JP4977889B2 - Multi-layered laminated paper with luminescent printing - Google Patents

Description

  The present invention relates to a multi-layered laminated paper that has been subjected to luminescent printing and can be applied to valuable products such as banknotes, passports, securities, stamps, product tags, toll roads, and various valuable tickets. Is.

  Currently, various anti-counterfeiting technologies are used for bank tickets, passports, securities, stamps, product tags, coupon tickets for toll roads, various tickets, and the like. For example, one of anti-counterfeiting techniques applied to the paper itself is a multi-layered paper. Also, as one of the techniques applied by printing, printing is performed with a colorless light emitting ink that cannot be usually confirmed under visible light, and when irradiated with ultraviolet rays, R (red), G (green) or B (blue) System), and authenticity is determined by the presence or absence of the light emission.

  For multi-layered paper, a sheet is inserted into the intermediate layer on the endless paper web of the paper machine, and the upper and lower layers are sandwiched between multiple raw material streams to form a multilayer wet web on the endless paper web. Is a multi-layered laminated paper in which any one or more of optical, electrical or magnetic specific substances are mixed or printed in advance to form a pattern, etc. A technique relating to a manufacturing method and a multi-layered laminated paper manufacturing apparatus is disclosed (for example, see Patent Document 1).

  The fluorescent image forming product has at least one fluorescent image forming layer and at least one visible image forming layer on a substrate, and the fluorescent image forming layer emits fluorescence having a wavelength in the visible light region by ultraviolet irradiation. A fluorescent image forming material containing a phosphor that is substantially transparent to visible light and forms an image related to an image formed by the visible image forming layer, wherein the fluorescent image forming layer comprises: A fluorescent image formed product having three layers of a blue light emitting fluorescent image forming layer, a green light emitting fluorescent image forming layer, and a red light emitting fluorescent image forming layer is disclosed (for example, see Patent Document 2).

  An image printed matter having at least two image forming layers on a substrate, comprising a phosphor that emits fluorescence when irradiated with ultraviolet rays, and is substantially transparent to visible light A fluorescent image-forming layer, and a phosphor that emits fluorescence of a color different from the fluorescence emitted by the phosphor contained in the first fluorescent image-forming layer, and is substantially transparent to visible light There has been disclosed an image printed matter that has a configuration including a second fluorescent image forming layer and forms a fluorescent image by irradiating ultraviolet rays (see, for example, Patent Document 3).

  Further, in a sheet having a multilayer structure of at least two or more layers, a second fluorescent coloring material that develops a color with a hue different from that of the first fluorescent coloring material, in which the first fluorescent coloring layer containing the first fluorescent coloring material is close to the upper surface. And the second fluorescent color forming layer is provided at a position close to the lower surface, and when the ultraviolet ray is irradiated from the upper surface side, only the fluorescent color developing material of the first fluorescent color developing layer is colored and observed from the upper surface side, and the ultraviolet light from the lower surface side is observed. A forgery-preventing sheet, wherein at least the fluorescent coloring material of the second fluorescent coloring layer is colored and observed from the upper surface side, and different fluorescent coloring is observed by ultraviolet irradiation from a different irradiation surface. It is disclosed (for example, see Patent Document 4).

Japanese Patent Laid-Open No. 2003-13395 (first page, FIG. 1-9) Japanese Patent Laid-Open No. 10-250211 (page 1-10, FIG. 1) JP-A-10-250212 (page 1-11, FIG. 1) WO 00/20220 (page 1-22, FIG. 1-4)

  However, Japanese Patent Application Laid-Open No. 2003-13395 performs fluorescent printing on an intermediate layer, and does not form a fluorescent printed region having an emission color different from that of the intermediate layer on an upper layer and a lower layer. Japanese Laid-Open Patent Publication No. 10-250211, which is a technology for forming fluorescent printing regions having different emission colors on the upper layer, the lower layer, and the intermediate layer, has a configuration in which a fluorescent image forming layer is laminated on a substrate, while forming a fluorescent image. The image was confirmed with reflected light from only one side of the object. Further, in Japanese Patent Laid-Open No. 10-250212, since an ultraviolet absorbing layer is provided on a substrate, a printed image forms a fluorescent image only on one side. In WO00 / 20220, in which different fluorescent colors are observed by irradiation of ultraviolet rays from different irradiation surfaces, only the single emission color of the first fluorescent coloring material can be confirmed when ultraviolet rays are irradiated from the upper surface side. The emission color due to the color mixture of the fluorescent coloring material and the second fluorescent coloring material could not be confirmed.

  The present invention aims to solve the above-mentioned problems, and is irradiated with ultraviolet rays from the surface of the multi-layered paper, and the irradiation is different from that observed with the naked eye from the front or back surface of the multi-layered paper. The surface was irradiated with ultraviolet rays from the back side of the multi-layered paper, and the luminescent color of the luminescent printed image was confirmed differently when observed with the naked eye from the front or back side of the multi-layered paper. Multi-layered laminated paper is proposed.

  The present invention is a multilayer paper having an upper layer having an ultraviolet transmittance of 4 to 70%, an intermediate layer made of nonwoven fabric, and a lower layer having an ultraviolet transmittance of 4 to 70%. A first luminescent printed image applied to one side of the layer and a first luminescent printed image applied to at least one of the front surface of the multi-layered paper and the back surface of the multi-layered paper. The first light emission print image and the second light emission print image are arranged so as to overlap at least partially via the upper layer, the intermediate layer, and / or the lower layer. Multi-layered laminated paper that has been printed.

  Further, the present invention is a multilayer laminated paper comprising an upper layer having an ultraviolet transmittance of 4 to 70%, an intermediate layer made of a nonwoven fabric, and a lower layer having an ultraviolet transmittance of 4 to 70%. A first luminescent printed image applied to one side of the intermediate layer, a second luminescent printed image having a luminescent color different from that of the first luminescent printed image on the surface of the multilayer woven paper, and a multilayer woven paper A first luminescent printed image, a second luminescent printed image having a luminescent color different from the first luminescent printed image and the second luminescent printed image on the back side of the paper; The luminescent printed image is a multi-layered laminated paper on which luminescent printing has been performed, wherein the luminescent printed image is arranged so as to overlap at least partially via an upper layer, an intermediate layer, and / or a lower layer.

  The present invention also provides a fluorescent printing ink that emits fluorescence when a luminescent printed image is irradiated with a wavelength of ultraviolet longwave, a fluorescent printing ink that emits fluorescence when irradiated with a wavelength of medium wavelength of ultraviolet light, and a fluorescence that emits fluorescence when irradiated with a wavelength of ultraviolet shortwave. A multi-layered laminated paper subjected to light-emission printing, characterized by being printed with at least one printing ink.

  The present invention also provides a fluorescent printing ink that emits fluorescence when the first light-emitting printed image is irradiated with a wavelength of ultraviolet longwave, a fluorescent printing ink that emits fluorescence when irradiated with a wavelength of medium wavelength of ultraviolet light, and a fluorescence when irradiated with a wavelength of ultraviolet shortwave. Printed with one of the fluorescent printing inks that emit light, the second light emitting printed image is printed with an ink different from the fluorescent printing ink printed with the first light emitting printed image, and the third light emitting printed image is the first light emitting light A multi-layered laminated paper subjected to luminescent printing, characterized in that it is printed with an ink different from the fluorescent printing ink printed with the printed image and the second luminescent printed image.

  Further, the present invention is a multilayer laminated paper subjected to luminescent printing, characterized in that it has a fourth luminescent printed image on the other surface of the intermediate layer not subjected to the first luminescent printed image. .

  The present invention also relates to a multi-layered laminated paper subjected to luminescent printing, wherein the intermediate layer is mixed or printed with one or more of optical, electrical or magnetic specific substances. is there.

  Irradiate ultraviolet rays from the surface of the multi-layered paper and observe it with the naked eye from the front or back surface of the multi-layered paper. In the case of observing with the naked eye from the front or back side of the bonding paper, the light emission of the region (mixed color) where at least a part of the first light emission print image, the second light emission print image, and the third light emission print image overlap. The color is confirmed differently. Since the luminescent color of the region where at least a part of the luminescent printed image overlaps has a different visual effect, it becomes a multi-layered laminated paper that has been subjected to luminescent printing with a high anti-counterfeit effect.

  Further, fluorescent printing ink that emits fluorescence when irradiated with a wavelength of ultraviolet long wave (having a peak wavelength near 365 nm), fluorescent printing ink that emits fluorescence when irradiated with a wavelength of medium wave of ultraviolet light (having a peak wavelength near 302 nm), and ultraviolet light By irradiating a short wave (having a peak wavelength near 254 nm) with a fluorescent printing ink that emits fluorescence, each layer is formed differently to form a luminescent printed image of each layer. Irradiate medium-wave or ultraviolet shortwave and observe with the naked eye from the front or back surface of the multi-layered laminated paper, and irradiate ultraviolet longwave, ultraviolet medium-wave or short-wave ultraviolet light from the backside of the multi-layered laminated paper with different irradiation surface. In the case of observing with the naked eye from the front surface or the back surface of the multi-layered laminated paper, the first light emission printing image and the second light emission printing Emission color of at least partially overlapping regions of the image and the third light-emitting print image is confirmed different for each excitation wavelength. The first light emission print image, the second light emission print image, and the third light emission print image have a visual effect in which different light emission print images can be confirmed for each color and excitation wavelength, and light emission with high forgery prevention effect is obtained. Multi-layered laminated paper with printing.

  Machine detection is possible for the first luminescent printed image, the second luminescent printed image, and the third luminescent printed image of the multilayer laminated paper that has been luminescent printed. For example, when the first light-emitting print image is mechanically detected at the time of ultraviolet long-wave irradiation, the second light-emitting print image is mechanically detected at the time of ultraviolet medium-wave irradiation, and the third light-emitting print image is mechanically detected at the time of ultraviolet short-wave irradiation. If the object is determined to be genuine, it can be determined to be false if it is not detected. In addition, the first light emitting printing is performed at the time of irradiation of ultraviolet long wave and ultraviolet ultraviolet wave, at the time of irradiation of ultraviolet medium wave and ultraviolet short wave, at the time of irradiation of ultraviolet long wave and ultraviolet short wave, or at the time of irradiation of ultraviolet long wave, ultraviolet ultraviolet medium wave and ultraviolet short wave. The overlapping region of the image, the second light emission print image, and the third light emission print image has different light emission colors, and the authenticity can be determined by the difference.

  The best mode for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the best mode for carrying out the invention described below, and includes various other embodiments within the scope of the technical idea described in the scope of claims.

  In the present invention, the light emission that forms a luminescent printed image includes fluorescent light emission when irradiated with ultraviolet light, phosphorescent light emission when irradiated with ultraviolet light, and phosphorescent light emission having afterglow after irradiation and phosphorescent light emission emitted in a dark room.

(Multilayer laminated paper A1 with luminescent printing)
FIG. 1 shows a multilayer laminated paper A1 and a sectional view thereof. FIG. 1 shows a lower paper layer 1 composed of a lower suspension paper layer obtained from a preceding paper material, an intermediate sheet 2 on which a first light-emitting printed image 4 is printed, and an upper layer material obtained from a rear paper material. It consists of an upper paper layer 3 consisting of a suspension-like paper layer, and a second light-emitting printed image 5 is printed on the surface of the multi-layered paper A1, and a third light-emitting printed image 6 on the back surface of the multi-layered paper A1 is printed. It is multilayer laminated paper A1 to which luminescent printing is performed. The lower paper layer 1 has an ultraviolet transmittance of 4 to 70%, the intermediate sheet 2 is a non-woven fabric made of rayon or PVA, and the upper paper layer 3 has an ultraviolet transmittance of 4 to 70%. The first luminescent printed image 4, the second luminescent printed image 5, and the third luminescent printed image 6 are at least partially overlapped via the lower paper layer 1, the intermediate sheet 2 and / or the upper paper layer 3. Arranged and has a mixed color area. For example, in the drawing, the first luminescent printed image 4 and the second luminescent printed image 5 are at least partially overlapped via the upper paper layer 3. In addition, the first luminescent printed image 4 and the third luminescent printed image 6 are at least partially overlapped with each other via the lower layer paper layer 1 and the intermediate layer sheet 2. The second luminescent printed image 5 and the third luminescent printed image 6 are at least partially overlapped with each other through the lower layer paper layer 1, the intermediate layer sheet 2, and the upper layer paper layer 3.

  A color mixture region where the first light emission print image 4 and the second light emission print image 5 overlap is defined as a first color mixture region c1. A color mixture area where the first light emission print image 4 and the third light emission print image 6 overlap is defined as a second color mixture area c2. A color mixture region where the second light emission print image 5 and the third light emission print image 6 overlap is defined as a third color mixture region c3. A color mixture region in which the first light emission print image 4, the second light emission print image 5, and the third light emission print image 6 overlap is defined as a fourth color mixture region c4. The first light-emission printed image 4 having no overlapping area is assumed to be a first monochrome area d1. The second light emitting print image 5 having no overlapping area is set as a second monochrome area d2. The third light emitting print image 6 having no overlapping area is assumed to be a third monochrome area d3. In FIG. 1, the first light emitting print image 4, the second light emitting print image 5, and the third light emitting print image 6 have a fourth color mixture region c <b> 4, which is a color mixture region. It is only necessary to have at least one set of mixed color areas of the image 4, the second luminescent printed image 5, and the third luminescent printed image 6. Alternatively, the first light-emitting print image 4, the second light-emitting print image 5, and the third light-emitting print image 6 may have only a mixed color region c4 where all the regions overlap.

  When observing with the naked eye by irradiating ultraviolet rays from the front surface of the multi-layered laminated paper A1 subjected to luminescent printing or from the rear surface which is a different irradiation surface, the first monochromatic region d1 and second of the first luminescent printed image In the second monochrome area d2 of the emission print image and the third monochrome area d3 of the third emission print image, the emission colors formed in the respective layers can be confirmed. However, in the second single color area d2 of the second light emission print image and the third single color area d3 of the third light emission print image, light is emitted when viewed from the front surface and viewed from the back surface. The strength is different. Similarly, the second monochromatic area d2 of the second luminescent printed image and the third monochromatic area d3 of the third luminescent printed image are irradiated from the back side, and light is emitted when viewed from the front side and from the back side. The strength is different.

  Next, the first color mixture region c1 where the first light emission print image 4 and the second light emission print image 5 overlap is the light emission color of the first light emission print image 4 and the light emission color of the second light emission print image 5. Can be confirmed. In the second color mixture region c2 where the first light emission print image 4 and the third light emission print image 6 are overlapped, the light emission color of the first light emission print image 4 and the light emission color of the third light emission print image 6 are mixed. I can confirm. In the third color mixture region c3 where the second light emission print image 5 and the third light emission print image 6 are overlapped, the light emission color of the second light emission print image 5 and the light emission color of the third light emission print image 6 are mixed. I can confirm. The fourth color mixture region c4 of the color mixture region in which the first light emission print image 4, the second light emission print image 5 and the third light emission print image 6 overlap is the light emission color of the first light emission print image 4, the second The mixed color of the emission color of the emission print image 5 and the emission color of the third emission print image 6 can be confirmed.

  Furthermore, the upper paper layer 3 has an ultraviolet transmittance of 4 to 70%, and the lower paper layer 1 has an ultraviolet transmittance of 4 to 70%. In the case of observing with the naked eye from the surface of the multi-layered laminated paper A1 or from the back surface, which is a different irradiation surface, and when observing with the naked eye from the backside, The light emission colors of the areas where the first light emission print image, the second light emission print image, and the third light emission print image overlap each other (mixed colors) are confirmed to be different. When the upper layer paper layer 3 is irradiated with ultraviolet rays, the hue of the emission color in the mixed color region is mainly the hue of the second emission printed image 5 formed on the upper layer paper layer 3. This is because the first light-emitting printed image 4 formed on the sheet 2 of the intermediate layer and the third light-emitting printed image 6 formed on the lower paper layer 1 have an ultraviolet transmittance of 4 to 70%. This is because the excitation light is partially absorbed by the lower paper layer 1 having an ultraviolet transmittance of 4 to 70%, and the emission intensity is lowered. When the lower layer paper layer 1 is irradiated with ultraviolet rays, the hue of the emission color in the mixed color region is mainly the hue of the third emission printed image 6 formed on the lower layer paper layer 1. This is because the first luminescent printed image 4 formed on the intermediate sheet 2 and the second luminescent printed image 5 formed on the upper paper layer 3 have an ultraviolet transmittance of 4 to 70%. This is because a part of the excitation light is absorbed by the lower paper layer 1 having an ultraviolet transmittance of 4 to 70%, and the emission intensity is lowered.

(Multilayer laminated paper A2 with luminescent printing)
FIG. 2 shows a multilayer laminated paper A2 and a sectional view thereof. FIG. 2 shows a lower paper layer 1 composed of a lower suspension paper layer obtained from a preceding paper stock, an intermediate sheet 2 on which a first light-emitting printed image 4 is printed, and an upper suspension obtained from a rear stock material. This is a layered laminated paper A2 which is composed of an upper layer paper layer 3 made of a turbid liquid paper layer and on which the second luminescent printed image 5 is printed on the back surface of the multilayered laminated paper. The lower paper layer 1 has an ultraviolet transmittance of 4 to 70%, the intermediate sheet 2 is a non-woven fabric made of rayon or PVA, and the upper paper layer 3 has an ultraviolet transmittance of 4 to 70%. The first luminescent printed image 4 and the second luminescent printed image 5 are arranged so that at least a part thereof overlaps with the lower paper layer 1 and the intermediate sheet 2 and has a mixed color region.

  A color mixture region where the first light emission print image 4 and the second light emission print image 5 overlap is defined as a first color mixture region c1. The first light-emission printed image 4 having no overlapping area is assumed to be a first monochrome area d1. The second light emitting print image 5 having no overlapping area is set as a second monochrome area d2. In FIG. 2, the first luminescent print image 4 and the second luminescent print image 5 do not overlap in all areas, but the first luminescent print image 4 and the second luminescent print image 5 overlap in all areas. May be.

  When observing with the naked eye by irradiating ultraviolet rays from the front surface of the multilayer laminated paper A2 subjected to luminescent printing or from the back surface of a different irradiated surface, the first monochromatic region d1 and the second unicolor region d1 of the first luminescent printed image In the second monochrome region d2 of the luminescent printed image, the luminescent color formed in each layer can be confirmed. However, in the second monochromatic region d2 of the second luminescent printed image, the luminescence intensity is different between when viewed from the front side and when viewed from the back side. Similarly, in the second monochrome region d2 of the second light emitting print image, the light emission intensity is different between when viewed from the back side and when viewed from the back side.

  Next, the first color mixture region c1 where the first light emission print image 4 and the second light emission print image 5 overlap is the light emission color of the first light emission print image 4 and the light emission color of the second light emission print image 5. Can be confirmed.

  Furthermore, the upper paper layer 3 has an ultraviolet transmittance of 4 to 70%, and the lower paper layer 1 has an ultraviolet transmittance of 4 to 70%. When the mixed color region of the multilayer laminated paper A2 that has been printed is irradiated with ultraviolet rays from the front surface and when irradiated with ultraviolet rays from the back surface, the hue of the emission color of the mixed color region is different. When the upper layer paper layer 3 is irradiated with ultraviolet rays, the hue of the light emission color in the mixed color region is the first light emission printing formed on the sheet 2 of the intermediate layer because no light emission print image is formed on the upper layer paper layer 3. The hue of the image 4 is the main color. This is because the second luminescent printed image 5 formed on the lower paper layer 1 is excited by the upper paper layer 3 having an ultraviolet transmittance of 4 to 70% and the lower paper layer 1 having an ultraviolet transmittance of 4 to 70%. This is because part of the light is absorbed and the emission intensity is lowered. When the lower layer paper layer 1 is irradiated with ultraviolet rays, the hue of the emission color in the mixed color region is mainly the hue of the second emission printed image 5 formed on the lower layer paper layer 1. This is because the first luminescent printed image 4 formed on the sheet 2 of the intermediate layer partially absorbs excitation light by the lower layer paper layer 1 having an ultraviolet transmittance of 4 to 70%, and the luminescence intensity becomes low. is there.

(Multilayer laminated paper A3 with luminescent printing)
FIG. 3 shows a multilayer laminated paper A3 and a sectional view thereof. FIG. 3 shows a lower paper layer 1 composed of a lower suspension paper layer obtained from a preceding paper stock, an intermediate sheet 2 on which a first light-emitting print image 4 is printed, and an upper suspension obtained from a rear stock material. This is a multi-layered laminated paper A3 which is composed of an upper layer paper layer 3 made of a turbid liquid paper layer and which has been subjected to luminescent printing on which a second luminescent printed image 5 is printed on the surface of the multi-layered laminated paper. The lower paper layer 1 has an ultraviolet transmittance of 4 to 70%, the intermediate sheet 2 is a non-woven fabric made of rayon or PVA, and the upper paper layer 3 has an ultraviolet transmittance of 4 to 70%. The first light emission print image 4 and the second light emission print image 5 are arranged so as to overlap at least partially via the upper paper layer 3 and have a mixed color region.

  A color mixture region where the first light emission print image 4 and the second light emission print image 5 overlap is defined as a first color mixture region c1. The first light-emission printed image 4 having no overlapping area is assumed to be a first monochrome area d1. The second light emitting print image 5 having no overlapping area is set as a second monochrome area d2. In FIG. 3, the first luminescent print image 4 and the second luminescent print image 5 do not overlap in all areas, but the first luminescent print image 4 and the second luminescent print image 5 overlap in all areas. May be.

  The first monochromatic region d1 and the second light emission of the first light emission print image when the ultraviolet ray is irradiated from the front surface of the multilayer laminated paper A3 subjected to the light emission printing or the back surface of the different irradiation surface and observed with the naked eye. In the second monochrome region d2 of the printed image, the emission color formed in each layer can be confirmed. However, the emission intensity differs between when viewed from the front side and when viewed from the back side in the second monochromatic region d2 of the second luminescent printed image. Similarly, in the second monochrome region d2 of the second light emitting print image, the light emission intensity is different between when viewed from the back side and when viewed from the back side.

  Next, the first color mixture region c1 where the first light emission print image 4 and the second light emission print image 5 overlap is the light emission color of the first light emission print image 4 and the light emission color of the second light emission print image 5. Can be confirmed.

  Furthermore, the upper paper layer 3 has an ultraviolet transmittance of 4 to 70%, and the lower paper layer 1 has an ultraviolet transmittance of 4 to 70%. When the ultraviolet light is irradiated from the front surface to the mixed color region of the multilayer laminated paper A3 that has been printed, the hue of the emission color of the mixed color region is different when the ultraviolet light is irradiated from the back surface. When the lower layer paper layer 1 is irradiated with ultraviolet rays, the hue of the light emission color in the mixed color region is the first light emitting print formed on the sheet 2 of the intermediate layer because no light emission print image is formed on the lower layer paper layer 1. The hue of the image 4 is the main color. This is because the second luminescent printed image 5 formed on the upper paper layer 3 is excited by the upper paper layer 3 having an ultraviolet transmittance of 4 to 70% and the lower paper layer 1 having an ultraviolet transmittance of 4 to 70%. This is because part of the light is absorbed and the emission intensity is lowered. When the upper layer paper layer 3 is irradiated with ultraviolet rays, the hue of the emission color in the mixed color region is mainly the hue of the second emission printed image 5 formed on the upper layer paper layer 3. This is because the first luminescent printed image 4 formed on the sheet 2 of the intermediate layer is such that the excitation light is partially absorbed by the upper paper layer 3 having an ultraviolet transmittance of 4 to 70% and the luminescence intensity is lowered. is there.

The sheet 2 of the intermediate layer of the multilayer laminated papers A1, A2 and A3 subjected to the luminescent printing is a nonwoven fabric. The nonwoven fabric is preferably rayon or PVA. Basis weight of the sheet is about 10 to 30 g / m ² is preferred. As for the thickness of a nonwoven fabric, about 20-100 micrometers is preferable.

As for the basic weight of the lower layer paper layer 1 which forms the multi-layered laminated paper in which the light emission printing was performed, about 10-40 g / m < ² > is preferable. The basis weight of the upper paper layer 3 to form a multilayer combination papers which emission printing has been performed is about 10 to 40 g / m ² is preferred. FIG. 4A shows the ultraviolet transmittance when the basis weight of the upper paper layer or the lower paper layer is 40 g / m ² . When the ultraviolet transmittance is less than 4%, most of the ultraviolet rays are absorbed in the paper layer, making it difficult to exhibit a color mixing effect. Further, when the ultraviolet transmittance is 71% or more, a color mixing effect is exhibited, but it is difficult to obtain a hue in which the color of the mixed color differs between the front and back surfaces of the paper. Therefore, the amount of ultraviolet rays reaching each luminescent printed image varies depending on the density difference of the materials having ultraviolet transmissive and absorbing properties, so that the luminescence intensity of each luminescent printed image changes, and the mixed luminescent color of the mixed color region changes. It will change.

FIG. 4B shows the ultraviolet transmittance of the multilayer paper having a basis weight of the upper paper layer of 40 g / m ² and a basis weight of the lower paper layer of 40 g / m ² . The range of the ultraviolet transmittance that exhibits the color mixing effect in the multilayer paper is 0.5 to 53%. When the ultraviolet transmittance is less than 0.5%, most of the ultraviolet rays are absorbed in the paper layer, making it difficult to develop a color mixing effect. In addition, when the ultraviolet transmittance is 54% or more, a color mixing effect appears, but it is difficult to obtain a hue in which the color of the mixed color differs between the front and back surfaces of the paper. Moreover, if it is in this range, the variation of the color mixing effect increases by making not only the basis weights of the upper layer paper stock and the lower layer paper stock the same, but also making them different.

  The first luminescent printed image 4, the second luminescent printed image 5, and the third luminescent printed image 6 of the multi-layered laminated paper subjected to the luminescent printing of the present invention have different luminescent colors of at least one image. However, in order to enhance the color mixing effect, it is preferable that the emission colors of the respective emission print images are different.

  In the multilayer laminated paper subjected to the light emitting printing of the present invention, a fourth light emitting printed image may be provided on the other surface of the intermediate layer not subjected to the first light emitting printed image. In this case, the first luminescent printed image 4, the second luminescent printed image 5 and / or the third luminescent printed image 6 and the lower layer paper layer 1, the intermediate layer sheet 2 and / or the upper layer paper layer 3 are used. At least a part is arranged overlapping. Further, the fourth light emission print image is either the same color as the light emission color of the first light emission print image 4, the second light emission print image 5 or the third light emission print image 6, or a different light emission color. May be.

  Further, when the first luminescent printed image is irradiated with a wavelength of a fluorescent printing ink that emits fluorescence when irradiated with a wavelength of ultraviolet long wave (having a peak wavelength near 365 nm), a wavelength of ultraviolet medium wave (having a peak wavelength near 302 nm). Printed with either fluorescent printing ink that emits fluorescence or fluorescent printing ink that emits fluorescence when irradiated with a wavelength of ultraviolet shortwave (having a peak wavelength in the vicinity of 254 nm), the second light-emitting printed image is the first light-emitting printed image. The third luminescent printed image is printed with an ink different from the fluorescent printed ink printed with the first luminescent printed image and the second luminescent printed image. The surface of the multilayer laminated paper is irradiated with ultraviolet longwave, ultraviolet medium wave and ultraviolet shortwave from the surface or the back surface of the multilayer laminated paper subjected to the luminescent printing of the invention. When observed with the naked eye from the back side, different types of images of the first luminescent printed image, the second luminescent printed image, or the third luminescent printed image are confirmed for each excitation wavelength. The light emission colors of the areas where at least a part of the print image, the second light emission print image, and the third light emission print image overlap are confirmed to be different. The first light emission print image, the second light emission print image, and the third light emission print image have a visual effect in which different light emission print images can be confirmed for each color and excitation wavelength, and light emission with high forgery prevention effect is obtained. Multi-layered laminated paper with printing.

  For example, FIG. 5 shows that the first luminescent printed image 4 formed on the sheet 2 of the intermediate layer is printed with a fluorescent printing ink that emits red light when irradiated with a wavelength of ultraviolet midwave (having a peak wavelength near 302 nm). The second light-emitting printed image 5 formed on the upper paper layer 3 is printed on the lower paper layer 1 by printing with fluorescent printing ink that emits blue light when irradiated with a wavelength of ultraviolet long wave (having a peak wavelength near 365 nm). The third luminescent printed image 6 is a multi-layered laminated paper printed with fluorescent printing ink that emits green light when irradiated with a wavelength of ultraviolet shortwave (having a peak wavelength near 254 nm).

  As shown in FIG. 5A, only the second light-emission printed image 5 emits blue light when irradiated with ultraviolet long waves. As shown in FIG. 5 (b), when the ultraviolet medium wave is irradiated, only the first light-emitting printed image 4 emits red light. As shown in FIG. 5C, when the ultraviolet short wave is irradiated, only the third light emitting print image 6 emits green light. As shown in FIG. 5D, magenta light emission, which is a mixed color of the first light emission print image 4 and the second light emission print image 5, is emitted when the ultraviolet long wave and the ultraviolet light medium wave are simultaneously irradiated. As shown in FIG. 5E, when the ultraviolet long wave and the ultraviolet short wave are simultaneously irradiated, cyan light emission that is a mixed color of the second light emission print image 5 and the third light emission print image 6 is emitted. As shown in FIG. 5 (f), yellow light, which is a mixed color of the first light-emitting printed image 4 and the third light-emitting printed image 6, is emitted when ultraviolet medium waves and ultraviolet short waves are simultaneously irradiated. As shown in FIG. 5G, when the ultraviolet long wave, the ultraviolet medium wave, and the ultraviolet short wave are simultaneously irradiated, the first light emitting printed image 4, the second light emitting printed image 5, and the third light emitting printed image 6 are mixed colors. It emits white light. As described above, when the ultraviolet ray is irradiated from the upper layer surface and when the ultraviolet ray is irradiated from the lower layer surface, the upper layer 3 and / or the ultraviolet transmittance is 4 to 70%. Since the excitation light is partially absorbed by the lower paper layer 1, the colors can be confirmed differently.

  By changing the design of the image for each of the first light emission print image, the second light emission print image, and the third light emission print image, it is possible to check images with different designs for each excitation light and easily determine the authenticity. Can be. Moreover, a higher visual effect can be obtained by combining the above-described emission color that changes for each excitation light and the image design that changes for each excitation light, and the forgery prevention effect is improved. Further, the first light emission print image, the second light emission print image, and the third light emission print image of the multi-layered laminated paper subjected to light emission printing can be machine-detected. For example, the first light-emitting print image is mechanically detected at the time of ultraviolet long-wave irradiation, the second light-emitting print image is mechanically detected at the time of ultraviolet medium-wave irradiation, and the third light-emitting print image is mechanically detected at the time of ultraviolet short-wave irradiation. If it is determined that the object is genuine, it can be determined to be false if it is not detected. Further, when the design of the luminescent image is the same, the first luminescent color is mechanically detected when the ultraviolet light is irradiated, the second luminescent color is mechanically detected when the ultraviolet light is irradiated, and the third luminescent color is detected when the ultraviolet light is irradiated. It is possible to determine that the object is genuine when the emission color is detected mechanically, and to determine that the object is false when it is not detected. In addition, the first light emitting printing is performed at the time of irradiation of ultraviolet long wave and ultraviolet ultraviolet wave, at the time of irradiation of ultraviolet medium wave and ultraviolet short wave, at the time of irradiation of ultraviolet long wave and ultraviolet short wave, at the time of irradiation of ultraviolet long wave, ultraviolet medium wave and ultraviolet short wave. The overlapping region of the image, the second light emission print image, and the third light emission print image has different light emission colors, and the authenticity can be determined by the difference.

  The sheet of the intermediate layer is subjected to luminescent printing with improved anti-counterfeiting effect by mixing or printing any one or more of optical, electrical or magnetic specific materials with infrared absorbing ink etc. Multi-layered laminated paper.

  Further, any layer of the multi-layered paper subjected to the luminescent printing of the present invention is provided with colored fibers or strips, colorless luminescent fibers or strips, colored luminescent fibers or strips, magnetic fibers or strips, metal It is possible to mix at least one kind of fiber or strip, aluminum fiber or strip, fiber or strip having infrared absorption characteristics, fiber or strip having infrared reflection characteristics, thermochromic fiber or strip, etc. It is. Furthermore, a thread, a plurality of gaps, etc. can be applied. Further, the type or color of the paper material may be different between the paper material of the upper paper layer 3 and the paper material of the lower paper layer 1.

  Further, the first light emission print image 4, the second light emission print image 5, and the third light emission print image 6 can be printed by a general printing method. The printing method is not particularly limited.

  Naturally, a printed pattern can be applied to the front or back surface of the multilayer laminated paper subjected to light emission printing by a general printing method in addition to the light emission print image. In addition, on the front or back surface of the multi-layered paper, any one or more of optical specific substances such as infrared absorbing ink or the like, or magnetic specific substances using magnetic ink can be printed. The printing method is not particularly limited.

  The lower suspension-like paper layer obtained from the preceding stock and the upper suspension-like paper layer obtained from the subsequent stock are not particularly limited. For example, plant fibers such as wood and cotton are used. Any of pulps such as chemical pulps obtained by the KP method or SP method as raw materials, mechanical pulps such as GP, TMP, CTMP, CGP, and SCP, bleached pulp, and recycled recycled paper can be used.

  Next, an example of the alignment of the first light-emitting printed image 4 formed on the sheet of the intermediate layer in the case where the multilayer laminated paper B is produced in a web shape will be shown.

  An example of alignment of the first light-emitting printed image 4 formed on the sheet of the intermediate layer and the clearance applied to the lower paper layer 1 is shown.

  As shown in FIG. 6, the multi-layered laminated paper B is provided with a gap 7. The multilayer laminated paper B is first with respect to the position r of the slot 7 (in the drawing, it is the position of one corner of the slot 7 but may be the center position if determined beforehand). The light emission print image position q (in the drawing, the position of one corner of the first light emission print image 4 is used, but if it is determined in advance, it may be the center position or the like). A predetermined interval s between the first light emission print image position q and the position r of the gap 7 in the direction, and a predetermined interval t between the first light emission print image position q and the position r of the gap 7 in the width direction, The intermediate layer sheet 2 on which the first light emission print image 4 is printed is inserted and fixed so that the gap 7 and the first light emission print image 4 are in a predetermined position. That is, the sheet 2 of the intermediate layer on which the first luminescent printed image 4 is printed has a predetermined interval s between the first luminescent printed image position q in the longitudinal direction of the multi-layered laminated paper B and the position r of the gap 7 and One or both of the predetermined interval t between the first light emitting print image position q in the width direction and the position r of the gap 7 is adjusted and inserted. Therefore, the first light emitting print image 4 is fixed at the predetermined position with the gap 7.

(Modification 1)
As shown in FIG. 7, the multi-layered laminated paper B has a white mark register mark or an IJP (inkjet printer) mark 8 as indicated by a cross mark in a predetermined positional relationship with the gap 7. It is given to multiple places at regular intervals in the paper making direction. In the first modification, attention is paid to the register mark or the mark 8 by IJP. The multilayer laminated paper B has a first emission print image position q (in the drawing, one corner portion of the first emission print image 4) with respect to the position v of the mark 8 (intersection center point of the cross mark). The center position or the like may be used if it is determined in advance.) Is defined as a predetermined interval s between the first light emitting print image position q and the position v of the mark 8 in the longitudinal direction of the multi-layered laminated paper B. The first light emitting print image is determined so as to have a predetermined interval t between the first light emitting print image position q and the position v of the mark 8 in the width direction so that the gap 7 is located at a predetermined position with the first light emitting print image 4. The intermediate sheet 2 provided with 4 is inserted and fixed. That is, the sheet 2 of the intermediate layer on which the first light emitting print image 4 is printed has a predetermined interval s between the first light emitting print image position q in the longitudinal direction of the multilayer laminated paper B and the position v of the mark 8, and One or both of the predetermined interval t between the first light emitting print image position q in the width direction and the position v of the mark 8 is adjusted and inserted. Therefore, the first light emitting print image 4 is fixed at the predetermined position with the gap 7.

  When the multi-layered paper B taken up by the winding device is cut, the first light-emission printed image position is determined from the position of the side of the multi-layered paper that has been subjected to a cut to be cut later. Cut so that up to q is a predetermined interval.

  The second light-emitting printed image 5 and / or the second light-emitting printed image 5 and / or the second light-emitting printed image 4 applied to the front and back surfaces of the multilayer laminated paper B so as to at least partially overlap the first light-emitting printed image 4 formed on the sheet 2 of the intermediate layer. 3 may be printed before being wound by the winding device or before being cut at a predetermined interval. Alternatively, the second light emitting print image 5 and / or the third light emitting print image 6 may be printed after being cut into sheets.

(Manufacturing equipment)
Next, an apparatus for producing multilayer laminated paper B of the best mode for carrying out the present invention will be described with reference to FIG. FIG. 8 is a diagram showing an overall configuration of a multilayer laminated paper manufacturing apparatus. In FIG. 8, a multi-layered laminated paper manufacturing apparatus 9 is composed of a web band and has an endless paper making wire 10 that circulates. The wire 10 is bridged between the driven pulley 11 and the driving pulley 12 and is supported by a plurality of supporting and guiding rolls arranged inside the wire 10 along the wire 10 and not guided. Has been circulating.

  A lower layer material supply tank 14, an intermediate layer sheet supply device 15, and an upper layer material supply tank 16 are spaced from the upstream side to the downstream side of the upstream portion 13 (movement start end portion on the upper surface of the wire) of the wire 10. Are arranged sequentially.

  The lower layer stock supply tank 14 and the upper layer stock supply tank 16 are filled with a lower suspension stock 17 and an upper suspension stock 18, respectively, and are appropriately supplied from a supply source (not shown). The liquid level is controlled to be maintained at a predetermined level. The lower suspension paper stock 17 and the upper suspension paper stock 18 are materials used as the raw material of the lower paper layer 1 and the upper paper layer 3, and are mainly composed of pulp fibers, water, and additives.

  In each of the downstream portions of the lower layer material supply tank 14 and the upper layer material supply tank 16, a lower sheet material sealing plate 19 and an upper layer material sealing plate 20 are arranged. The lower layer suspension material 17 and the upper layer suspension material 17 are placed on the wire 10 through the gaps between the lower layer material sealing plate 19 and the upper layer material sealing plate 20 and the wire 10, respectively. 18 is supplied to enable papermaking.

  The sheet supply portion of the intermediate layer by the intermediate sheet supply apparatus 15 is provided on the downstream side of the lower layer material supply tank 14 and on the upstream side of the upper layer material supply tank 16. It is supplied toward the lower suspension-like paper layer 21 formed on the wire 10. The intermediate layer sheet supply device 15 corrects the insertion position of the intermediate layer sheet 2 on which the intermediate layer sheet supply drum 22, the tension roll 23 and the first light emitting print image 4 are printed in the paper making direction. A position correction roll 27 in the position correction device 24 is provided.

  A belt-like intermediate layer sheet 2 is wound around the intermediate layer sheet supply drum 22, and the intermediate layer sheet 2 is supplied while being fed toward the wire 10. As described above, the first light-emission printed image 4 is printed on the belt-shaped intermediate layer sheet at a predetermined interval in the longitudinal direction. However, when the first light emitting print image 4 is not applied to the intermediate layer sheet, the intermediate layer sheet 2 is fed from the intermediate layer sheet supply drum 22 while being fed out toward the wire 10. The first light-emission printed image 4 is printed on the sheet at a certain interval in the longitudinal direction by the printing device 36.

  The width of the belt-like intermediate layer sheet 2 supplied from the intermediate layer sheet supply device 15 is the lower layer suspension formed by being supplied from the lower material sealing plate 19 to the upper surface (conveying surface) of the wire 10. It is substantially the same as the width of the liquid paper layer 21, and is further supplied to the upper surface of the lower suspension-like paper layer 21 from the upper-layer paper seal plate 20, and is formed as an upper suspension-like paper layer 25. It is almost the same as the width of.

  The intermediate sheet position correcting device 24 includes a position controller 26 for controlling the position correcting roll 27. The position correction roll 27 is inserted into the first light emitting print image position q in which the interval between the position r of the cut 7 of the multi-layered paper B and the first light emitting print image position q is set in the longitudinal direction in advance. 7 is adjusted from the predetermined interval s at the position r, the feeding speed of the sheet 2 of the intermediate layer is adjusted to correct the shift of the first light emitting print image position in the longitudinal direction. In the first modification, the interval between the first light emission print image position q and the register mark or IJP mark position v is a predetermined interval between the first light emission print image position q and the mark position v set in advance in the longitudinal direction. When it deviates from s, the feeding speed of the intermediate layer sheet 2 is adjusted to correct the displacement of the first light emitting print image position in the longitudinal direction.

  The position correcting roll 27 is driven by a motor capable of speed control by a control signal from the position controller 26, and is configured by a roll capable of feed control capable of positively increasing or decreasing the feed speed of the sheet 2 of the intermediate layer.

  The intermediate layer sheet supply drum 22 is not shown so that it can be moved in the longitudinal direction of its axis, that is, in the width direction of the intermediate layer sheet 2 so that the intermediate layer sheet can be moved and adjusted in the width direction. It is configured to be adjusted by the sheet supply drum width direction position adjusting device of the intermediate layer. Thereby, the sheet supply drum width direction position adjusting device of the intermediate layer has the first light emission print image position q in which the interval between the first light emission print image position q and the position r of the scraping 7 is preset in the width direction. When the gap 7 deviates from the predetermined interval t at the position r, the intermediate sheet 2 is moved in the width direction with respect to the multi-layered laminated paper B, and the first light emitting print image position in the width direction is shifted. To correct. In the first modification, the interval between the first light emitting print image position q and the register mark or IJP mark position v is a predetermined interval between the first light emitting print image position q and the mark position v preset in the width direction. When it deviates from t, the sheet 2 of the intermediate layer is moved in the width direction with respect to the multi-layered laminated paper B to correct the deviation of the first light emitting print image position in the width direction.

  A water squeezing box 28 is arranged below the downstream portion of the wire 10 (the movement end portion on the upper surface of the wire). In the downstream portion of the wire 10 in the paper making process, the water squeezing box 28 removes water contained in the lower suspension paper layer 21, the intermediate sheet 2 and the upper suspension paper layer 25. The water is sucked and squeezed.

  The multi-layered paper B formed with the wire 10 is guided by a guide roll (not shown) and taken up by a take-up roll as a final product. A press roll is provided between the wire 10 and the take-up roll from the upstream side. 29, a drying device 30 (indicated by an imaginary line in FIG. 8) and a misalignment detection device 31 are provided. The press roll 29 squeezes the multilayer laminated paper.

  The press roll 29 sandwiches the multi-layered paper B and feeds it further to the downstream winding roll side. The gap is formed by a known press roll 29 or dandy roll 33. The drying device 30 uses a known drying device.

  The positional deviation detection device 31 includes a position detector 32 and a positional deviation discriminator 34. The position detector 32 is a detecting means that can detect a transmitted light image having a CCD camera or the like, and uses transmitted light from a light table 35 arranged on the opposite side of the multilayer laminated paper B to be detected. By detecting the position r of the gap 7 and the first light emitting print image position q, the distance between them is measured, and this is sent to the misregistration discriminator 34 as an electrical signal. In the first modification, the register mark or IJP mark position v and the first light emitting print image position q are detected.

  The misregistration discriminator 34 includes the interval between the first light emitting print image position q sent from the position detector 32 and the position r of the squeeze 7 and the first light emitting print image position in the longitudinal direction set in advance. The difference between q and the predetermined interval s between the position r of the gap 7 and / or the first light emitting print image position q in the width direction and the predetermined interval t between the position r of the gap 7 and the direction of the deviation are determined. Then, it is sent to the position controller 26 as positional deviation information. In the first modification, the interval between the first light emitting print image position q and the position v of the register mark or IJP mark 8 and the preset first light emitting print image position q and the position v of the mark 8 in the longitudinal direction are set. And determining the direction and direction of the deviation between the predetermined light emitting print image position q in the width direction and / or the first light emitting print image position q in the width direction and the predetermined distance t in the position v of the mark 8 This is an example sent to the controller 26.

  The first luminescent printed image 4 formed on the sheet 2 of the intermediate layer is applied to the front and back surfaces of the multilayer laminated paper B obtained by the manufacturing apparatus shown in FIG. The second light emission print image 5 and / or the third light emission print image 6 may be printed before being wound by the winding device and before being cut at a predetermined interval. Alternatively, the second light emitting print image 5 and / or the third light emitting print image 6 may be printed after being cut into sheets.

(Production method)
A method for producing a multi-layered laminated paper that has been subjected to luminescent printing will be described in turn below.

(1) The lower-layer suspension-like stock 17 in the lower-layer stock supply tank 14 passes through the gap between the lower-layer stock supply plate 19 and the wire 10 from the lower-layer stock supply tank 14 and circulates the wire 10. Is supplied to the upper surface of the substrate. The lower suspension-like paper layer 21 supplied on the wire 10 is sent as the lower suspension-like paper layer 21 in the paper making direction.

(2) The belt-like intermediate layer sheet 2 on which the first light-emitting print image 4 is printed is continuously supplied from the intermediate layer sheet supply device 15 to the upper surface of the lower suspension-like paper layer 21. The However, when the first light-emitting print image 4 is not printed on the intermediate layer sheet in advance, the intermediate layer sheet 2 is fed from the intermediate layer sheet supply drum 22 while being fed toward the wire 10. The first light-emission printed image 4 is applied to the layer sheet at a certain interval in the longitudinal direction by the printing device 36. Then, the belt-like intermediate layer sheet 2 overlaps with the lower suspension paper layer 21 while being fed in the paper making direction on the wire 10, and the lower suspension paper stock 17 is a fiber of the intermediate layer sheet 2. The pulp fibers of the lower-layer suspension-like stock 17 and the fibers of the sheet 2 of the intermediate layer are entangled with each other.

(3) Next, the upper suspension stock 18 in the upper stock supply tank 16 passes through the gap between the upper stock supply plate 20 and the wire 10 from the upper stock supply tank 16 and is suspended in the lower layer. It is supplied to the upper surface of the sheet 2 of the belt-shaped intermediate layer that is overlapped with the pulp fibers of the turbid liquid stock 17. Then, the upper suspension paper stock 18 is overlapped with the intermediate sheet 2 while being sent in the paper making direction as the upper suspension paper layer 25 on the wire 10, and the upper suspension stock 18. Enters between the fibers of the sheet 2 of the intermediate layer. In this way, the lower layer suspension material 17, the intermediate layer sheet 2 on which the first light emitting print image 4 is printed, and the upper layer suspension material 18 are sequentially supplied on the wire 10. Make paper in multiple layers. The region of the intermediate sheet 2 on which the first light-emitting printed image 4 is applied is intertwined with the fibers of the lower suspension-like stock 17 and the fibers of the upper suspension-like stock 18 entangled with each other. Then, the multi-layered laminated paper B is made.

(4) The multi-layered laminated paper B passes through the water squeezing box 28 and is subjected to the pouring 7 by the press roll 29. The gap 7 is a position at a predetermined interval s between the first emission print image position q preset in the longitudinal direction of the multilayer laminated paper B from the first emission print image position q and the position r of the penetration 7. To be applied. By adjusting in this way, the gap 7 is arranged at a predetermined position with the first light emitting print image 4. That is, the gap 7 is formed by controlling the rotational speed of the press roll and the like in consideration of the wire feed speed and the first light emitting print image position in the intermediate layer sheet. However, in actuality, when the sheet of the intermediate layer is inserted, the first light emitting print image position q is set to the first light emitting print image position q in the longitudinal direction that is set in advance with respect to the position r of the planned filling 7. Since there is a case where the predetermined distance s of the position r of the clearance 7 and / or the first light emitting print image position q in the width direction is shifted from the position of the predetermined distance t of the position r of the clearance 7, there is a shift as described later. Position correction is required.

(5) The multilayer laminated paper B formed in this way is further dried by passing through a drying device to be completed as a final product. Then, in the middle of sending the multi-layered paper B as a product to the winding device, the misalignment detecting device 31 causes the position 7 of the multi-layered paper to be inserted 7 and the first light emitting print image position q. The predetermined interval s between the first light-emitting print image position q in the longitudinal direction and the position r of the clearance 7 and / or the first light-emitting print image position q in the width direction and the clearance are set in advance. 7 is detected, the position shift information is also generated and sent to the position controller 26 of the position correction device 24.

  In the case where alignment is not performed by scavenging, the registration mark or IJP mark position v and the first light emitting print image position q are detected by the misregistration detection device 31 while being sent to the winding device that takes up as a product. Regarding the actual interval, a predetermined interval s between the first light emitting print image position q in the longitudinal direction and the mark position v and / or the first light emitting print image position q in the width direction and the mark position v are set in advance. The amount of deviation from the predetermined interval t is detected and position deviation information is generated and sent to the position controller 26 of the position correction device 24.

(6) The position controller 26 receives the positional deviation information and controls the position correction roll 27 to control the feeding of the intermediate sheet 2. That is, the position correction roll 27 can increase or decrease the feeding speed of the belt-shaped intermediate layer sheet 2 by adjusting the feeding speed via a motor according to a command from the position controller 26. Therefore, with respect to the position of the first light emitting print image applied to the intermediate sheet 2, the relative position in the paper making direction with respect to the lower suspension-like paper layer 21 can be adjusted. When the position correcting roll 27 deviates from the predetermined interval s, the interval between the first light emitting print image position q in the longitudinal direction and the position r of the gap 7 or the first light emitting print image position q and the register mark or IJP. The interval between the mark positions v by the predetermined first emission print image position q in the longitudinal direction and the position r of the squeeze 7 or the predetermined interval s between the first emission print image position q and the mark position v. The feed rate of the intermediate layer sheet 2 is adjusted so that the displacement of the first light emitting print image position in the longitudinal direction is corrected.

  The intermediate layer sheet supply drum 22 is moved in the longitudinal direction of its axis, that is, in the width direction of the intermediate layer sheet 2, so that the intermediate layer sheet supply drum 22 can be moved for each intermediate layer sheet and adjusted in position in the width direction. The intermediate layer can be adjusted by a sheet feeding drum width direction position adjusting device. The sheet feeding drum width direction position adjusting device of the intermediate layer, when deviating from the predetermined interval t, the interval between the first light emitting print image position q and the position r of the cleaning 7 in the width direction or the first light emitting print image position. The interval between q and the register mark or IJP mark position v is set in advance between the first light emitting print image position q and the position r of the gap 7 in the width direction, or between the first light emitting print image position q and the mark. The sheet 2 of the intermediate layer is moved in the width direction so that the predetermined interval t at the position v is reached, and the displacement of the first light emitting print image position in the width direction is corrected. By adjusting in this way, the gap 7 is arranged at a predetermined position with the first light emitting print image 4.

(7) a second light-emitting printed image 5 that is applied so that at least a part of the first light-emitting printed image 4 formed on the sheet 2 of the intermediate layer overlaps the front and back surfaces of the multi-layered paper B; The third light emitting print image 6 may be printed before being wound by the winding device or before being cut at a predetermined interval. Alternatively, the second light emitting print image 5 and / or the third light emitting print image 6 may be printed after being cut into sheets.

  The multi-layered laminated paper can be made to have different color, basis weight, or fiber configuration by changing the stock characteristics of the raw material stored in the lower layer stock supply tank 14 or the upper layer stock supply tank 16. The color can be adjusted by operations such as differences in fiber types, mixing of pigments and dyes, and bleaching or unbleaching. The basis weight can be adjusted by adjusting the raw material concentration and the raw material discharge section. The fiber configuration can be adjusted by changing the fiber type, blending ratio, fiber length, beating degree, and the like.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, the content of this invention is not limited to the range of these Examples.

Example 1
The multilayer laminated paper on which the light emitting printing of Example 1 was performed was produced using the multilayer laminated paper manufacturing apparatus shown in FIG. First, the beating degree of the softwood bleached kraft pulp was adjusted to 550 ml of Canadian Standard Freeness, and the lower layer suspension-like stock 17 was obtained. The lower-layer suspension-like stock 17 passes through the gap between the lower-layer stock supply plate 19 and the wire 10 from the lower-layer stock supply tank 14, and the lower-layer suspension-like stock 17 is circulated through the lower-layer suspension-like stock 17. The lower suspension paper stock 17 supplied to the upper surface and supplied onto the wire 10 was sent in the paper making direction as a lower suspension paper layer 21.

Next, a roll on which a first light-emitting print image 4 is printed in advance, which is composed of PVA fibers having a basis weight of 12 g / m ² , a thickness of 35 μm, and a high air permeability that is equal to or less than a measurement limit according to the JIS air permeability test method. The intermediate sheet 2 is set on the intermediate sheet supply drum 22, and the first light emitting printing is performed in advance on the upper surface of the lower suspension-like paper layer 21 from the intermediate sheet supply device 15. A belt-shaped intermediate layer sheet 2 provided with the image 4 was continuously fed. The preprinted first luminescent printed image 4 was printed with a screen printer using a screen ink prepared at the following blending ratio. The luminescent pigment emits red light. FIG. 9 shows the spectrum of SPD-116S.
Luminescent pigment (Toshiba, SPD-116S) 25 parts by weight Medium (Seiko Advance, UVA 9117) 74.9 parts by weight Antifoam (Toray Dow Corning Silicone, SC5540)
0.1 parts by weight

  On the upper surface of the sheet 2 of the belt-shaped intermediate layer laminated with the pulp fiber of the lower suspension-like stock 17, the upper suspension-like stock obtained by adjusting unbleached kraft pulp to 570 ml of Canadian standard freeness 18 was supplied from the upper layer stock supply tank 16 through the gap between the upper layer stock plug 20 and the wire 10.

The multi-layered laminated paper passed through the squeezing box 28 and was subjected to crease 7 by a press roll 29. The relationship between the position of the first light emitting print image position and the gap 7 is the first interval preset in the width direction and the predetermined interval between the position of the first light emitting print image position and the gap 7 preset in the longitudinal direction. A predetermined interval between the position of the light emitting print image and the position of the gap 7 was set. Furthermore, it passed through the drying apparatus and was dried to complete a multi-layered laminated paper. The multi-layered laminated paper to be wound was cut at a predetermined position to obtain a multi-layered laminated paper on which a sheet was subjected to light emission printing. The basis weight of the upper paper layer is 15 g / m ² . The basis weight of the lower paper layer is 15 g / m ² . When the basis weight was 15 g / m ² , the ultraviolet transmittance was about 57% for 365 nm irradiation, 48% for 302 nm irradiation, and about 41% for 254 nm irradiation.

The obtained multilayer laminated paper was printed on the surface of the multilayered laminated paper with a screen printer by using the screen ink prepared at the following blending ratio, using a screen printer. The luminescent pigment emits blue light. The spectrum of D1230 is shown in FIG.
Luminescent pigment (manufactured by Nemoto Special Chemical Co., Ltd., D1230) 16 parts by weight Medium (manufactured by Seiko Advance, UVA 9117) 83.9 parts by weight Defoaming agent (manufactured by Dow Corning Silicone, SC5540)
0.1 parts by weight

Moreover, the obtained multilayer laminated paper printed the 3rd light emission printing image 6 with the screen printing machine with the screen ink produced in the following compounding ratio on the back surface of the multilayer laminated paper. The luminescent pigment emits green light. FIG. 11 shows a spectrum of green emission.
Luminescent pigment (manufactured by Nemoto Special Chemical Co., Ltd .: green light emission) 3 parts by weight Medium (Seiko Advance, UVA 9117) 96.9 parts by weight Defoaming agent (Toray Dow Corning Silicon, SC5540)
0.1 parts by weight

  When an ultraviolet ray irradiation lamp (ULTRA-VIOLET PRODUCTS, Inc .: 3UV-34) is used and an ultraviolet ray having an excitation wavelength of 365 nm is irradiated, the first light emission print image, the second light emission print image, and the third light emission print image Different light emission colors were confirmed on the front and back sides where either of them overlapped. The upper layer paper layer 3 had an ultraviolet transmittance of about 57%, and the lower layer paper layer 1 had an ultraviolet transmittance of about 57%. In the fourth color mixture region c4 having the configuration shown in FIG. 1, since ultraviolet rays are absorbed every time they pass through the upper paper layer 3 and the lower paper layer 1, purple is confirmed when irradiated from the upper surface and viewed from the lower surface. did. On the contrary, when irradiating from the lower layer surface and visually recognizing from the upper layer surface, a reddish light blue color was confirmed.

  Second light-emitting print image 5 formed with an ink containing a light-emitting pigment (D1230) in the upper layer, and first light-emitting print image 4 formed with an ink containing a light-emitting pigment (SPD-116S) in the intermediate layer 1 using the multi-layered laminated paper of FIG. 1 composed of the third light-emitting printed image 6 formed with an ink containing a light-emitting pigment (green light-emitting) in the lower layer, The spectrum (from Hitachi High-Technologies Corporation: F-4500 spectrofluorometer) from the front and back of the laminated paper was measured. FIG. 13 shows the spectral spectra of the front and back of the paper when irradiated with long-wave ultraviolet light. It was a multi-layered laminated paper that can confirm from the spectral spectrum that the mixed color effect of the luminescent printed image in the mixed color region and the color of the mixed color differ between the front and back sides. FIG. 14 shows the spectral spectra of the front and back sides of the paper when irradiated with medium-wave ultraviolet rays, and FIG. 15 shows the spectral spectra of the front and back sides of the paper when irradiated with short-wave ultraviolet rays.

  Next, in FIGS. 13 and 14, the light emission intensity in the vicinity of 650 nm was almost the same on both sides. By using this effect, authentication is based on the coincidence of the emission spectra on the front and back of the paper, unlike conventional mechanical authentication technology that uses the peak of emission intensity of the light emitter itself and authentication technology that limits the authentication wavelength. It becomes possible. For this reason, an authentication method using two wavelengths of a long wave and a medium wave is possible without being affected by a change in light emission intensity accompanying a change with time. Therefore, a multi-layered paper with improved authentication accuracy and a high anti-counterfeit effect was obtained.

  In addition, since the paper has a structure in which a substance having ultraviolet transmissivity and absorbency is sandwiched, the rate of decrease in light emission intensity over time of the light emitter is lower than that exposed on the paper surface. As a long life.

(Example 2)
Example 2 is an example in which a luminescent printed image was printed with an ink different from Example 1 in the same manner as Example 1. On the sheet 2 of the intermediate layer, a first light-emitting print image 4 that emits light with ultraviolet rays having excitation wavelengths of 302 nm and 254 nm was printed. The preprinted first luminescent printed image 4 was printed with a screen printer using a screen ink prepared at the following blending ratio. The luminescent pigment emits red light. FIG. 12 shows the spectrum of YPV-F.
Luminescent pigment (manufactured by Nemoto Special Chemical Co., Ltd., YPV-F) 0.75 parts by weight Medium (Seiko Advance Co., Ltd., UVA 9117) 99.15 parts by weight Defoaming agent (manufactured by Dow Corning Silicone, SC5540)
0.1 parts by weight

  Using a multi-layered sheeting device, a multi-layered paper sheet that has been subjected to light-emission printing is prepared. Printed.

The obtained multi-layered paper was printed on the surface of the multi-layered paper with the second light-emitting printed image 5 using a screen ink prepared at the following blending ratio. The luminescent pigment emits blue light.
Luminescent pigment (manufactured by Nemoto Special Chemical Co., Ltd., D1230) 16 parts by weight Medium (manufactured by Seiko Advance, UVA 9117) 83.9 parts by weight Defoaming agent (manufactured by Dow Corning Silicone, SC5540)
0.1 parts by weight

Moreover, the obtained multilayer laminated paper printed the 3rd light emission printed image 6 with the screen ink produced in the following mixture ratio on the back surface of the multilayer laminated paper. The luminescent pigment emits green light.
Luminescent pigment (manufactured by Nemoto Special Chemical Co., Ltd., green light emission) 3 parts by weight Medium (manufactured by Seiko Advance, UVA 9117) 96.9 parts by weight Defoaming agent (manufactured by Dow Corning Silicone, SC5540)
0.1 parts by weight

  When an ultraviolet ray irradiation lamp (ULTRA-VIOLET PRODUCTS, Inc .: 3UV-34) was used and irradiated with ultraviolet rays having an excitation wavelength of 302 nm, different emission colors were confirmed on the front and back sides where the emission print images overlapped. The ultraviolet transmittance of the upper paper layer 3 was about 48%, and the ultraviolet transmittance of the lower paper layer 1 was about 48%. In the fourth color mixture region c4 having the configuration shown in FIG. 1, since ultraviolet rays are absorbed every time the upper layer paper layer 3 and the lower layer paper layer 1 are passed through, the pink color is confirmed when irradiated from the upper layer surface and viewed from the lower layer surface. . On the contrary, when irradiating from the lower layer surface and visually recognizing from the upper layer surface, white was confirmed.

  In addition, when an ultraviolet irradiation lamp (ULTRA-VIOLET PRODUCTS, Inc .: 3UV-34) was used and irradiated with ultraviolet rays having an excitation wavelength of 254 nm, different emission colors were confirmed on the front and back sides where the emission printed images overlapped. The upper layer paper layer 3 had an ultraviolet transmittance of about 41%, and the lower layer paper layer 1 had an ultraviolet transmittance of about 41%. In the fourth color mixing region c4 having the configuration shown in FIG. 1, since ultraviolet rays are absorbed every time they pass through the upper paper layer 3 and the lower paper layer 1, it is confirmed to be bluish purple when irradiated from the upper layer surface and viewed from the lower layer surface. did. On the contrary, when irradiating from the lower layer surface and visually recognizing from the upper layer surface, a greenish light blue color was confirmed.

  Second luminescent printed image 5 formed with an ink containing a luminescent pigment (D1230) in the upper layer, and first luminescent printed image 4 formed with an ink containing a luminescent pigment (YPV-F) in the intermediate layer. 1 using the multi-layered laminated paper of FIG. 1 composed of the third light-emitting printed image 6 formed with an ink containing a light-emitting pigment (green light-emitting) in the lower layer, The spectrum (from Hitachi High-Technologies Corporation: F-4500 spectrofluorometer) from the front and back of the laminated paper was measured. FIG. 17 shows the spectrum on the front and back of the paper when irradiated with medium-wave ultraviolet light, and FIG. 18 shows the spectrum of the paper on the front and back when irradiated with short-wave ultraviolet light. Even when the excitation wavelength of the ultraviolet rays was changed, a multilayered laminated paper in which the mixed color effect of the luminescent printed image on the front and back of the multilayered laminated paper and the color change were obtained. FIG. 16 shows the spectral spectra of the front and back of the paper when irradiated with long-wave ultraviolet light. It was confirmed that the color mixing effect and the color change can be obtained even in the color mixing region by the light emitting printed images on the front and back sides of the paper without using the light emitting printed image of the intermediate layer.

  Next, in FIG. 17, the emission intensity in the vicinity of 620 nm was the same on both sides. By using this effect, it is possible to perform the authentication based on the coincidence of the emission spectra from the front and back of the paper, not the authentication technique using the emission intensity peak of the light emitter itself, which is a conventional machine authentication technique. For this reason, the authentication method which does not affect the change of the emitted light intensity accompanying a time-dependent change is attained.

  In addition, since the paper produced in Example 1 and Example 2 is targeted for a form in which printing suitability, print quality, and paper thickness are maintained to some extent, the light emitting printed image of the intermediate layer does not emit light by ultraviolet shortwave, and ultraviolet light Although the machine authentication of the intermediate layer by shortwave does not function, the medium is changed to an aqueous varnish with low UV shortwave absorption capacity, and the paper basis weight of the upper and lower layers is reduced, so that the intermediate layer image is emitted even by the ultraviolet shortwave. Needless to say, machine authentication can be performed.

It is multilayer laminated paper A1 to which luminescent printing was performed, and its sectional view. It is the multilayer laminated paper A2 to which the luminescent printing was given, and its sectional drawing. It is multilayer laminated paper A3 to which luminescent printing was given, and its sectional view. It is a figure which shows the ultraviolet-ray transmittance by a single layer paper or a multilayer paper. It is an example of the luminescent color at the time of irradiating the wavelength of an ultraviolet long wave, an ultraviolet medium wave, and an ultraviolet short wave to the multilayer paper-sheet to which the light emission printing was performed. It is a figure which shows the X-X 'cross section when the strip | belt-shaped multilayer laminated paper B is observed in a longitudinal direction. It is a figure which shows the example in which the register | resistor mark which consists of white crease, or the mark 8 by IJP (ink-jet printer) is provided to the several places at fixed intervals in the papermaking direction. It is a figure which shows the manufacturing apparatus of the multilayer laminated paper of the best form for implementing this invention. It is a figure which shows the spectrum of SPD-116S. It is a figure which shows the spectrum of D1230. It is a figure which shows the spectrum of green light emission. It is a figure which shows the spectrum of YPV-F. It is a figure which shows the spectral spectrum of the paper front and back at the time of the long wave ultraviolet irradiation of the multilayer laminated paper in which the light emission printing of Example 1 was given. It is a figure which shows the spectral spectrum of the paper front and back at the time of medium wave ultraviolet irradiation of the multilayer laminated paper in which the light emission printing of Example 1 was given. It is a figure which shows the spectrum of the paper front and back at the time of the short wave ultraviolet irradiation of the multilayer laminated paper in which the light emission printing of Example 1 was performed. It is a figure which shows the spectral spectrum of the paper front and back at the time of the long wave ultraviolet irradiation of the multilayer laminated paper in which the light emission printing of Example 2 was given. It is a figure which shows the spectrum of the paper front and back at the time of medium wave ultraviolet irradiation of the multilayer laminated paper in which the light emission printing of Example 2 was given. It is a figure which shows the spectrum of the paper front and back at the time of the short wave ultraviolet irradiation of the multilayer laminated paper in which the light emission printing of Example 2 was performed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lower layer paper layer 2 Middle layer sheet 3 Upper layer paper layer 4 1st light emission printing image 5 2nd light emission printing image 6 3rd light emission printing image 7 Interposition 8 Register mark or mark by IJP 9 Multi-layered laminated paper Manufacturing machine 10 Paper making wire 11 Driven pulley 12 Drive pulley 13 Upstream part of wire 14 Lower layer material supply tank 15 Intermediate layer sheet supply device 16 Upper layer material supply tank 17 Lower layer suspension material 18 Upper-layer suspension stock 19 Seal plate for lower-layer stock 20 Seal plate for upper-layer stock 21 Lower-layer suspension-like paper layer 22 Intermediate-layer sheet supply drum 23 Tension roll 24 Position correction device 25 Upper-layer stock Suspension-like paper layer 26 Position controller 27 Position correction roll 28 Squeezing box 29 Press roll 30 Drying device 31 Misalignment detection device 32 Position detector 33 Ndyroll 34 misregistration discriminator 35 light table 36 printing equipment A1, A2, A3 Multi-layered laminated paper subjected to light-emission printing B multi-layered laminated paper q First light-emission printed image position r Position of insertion v Marking Position s Predetermined interval in the longitudinal direction t Predetermined interval in the width direction c1 First mixed color region c2 Second mixed color region c3 Third mixed color region c4 Fourth mixed color region d1 First single color region d2 Second single color region d3 Third monochromatic area

Claims (6)

Upper ultraviolet transmittance of 4-70% in the wavelength range of ultraviolet radiation having a peak wavelength around 254nm to ultraviolet radiation having a peak wavelength around 365 nm, the lower intermediate layer and the ultraviolet transmittance of 4-70% consists of non-woven fabric A multi-layered paper comprising the first light-emitting printed image applied to one side of the intermediate layer, the surface of the multi-layered paper, and the multi-layered paper A second light-emitting image having a light emission color different from the first light-emitting print image applied to at least one of the back surfaces of the paper, the first light-emitting print image and the second light-emitting print image are: A multi-layered laminated paper subjected to luminescent printing, characterized in that at least a part of the upper layer, the intermediate layer, and / or the lower layer is disposed so as to overlap each other. Upper ultraviolet transmittance of 4-70% in the wavelength range of ultraviolet radiation having a peak wavelength around 254nm to ultraviolet radiation having a peak wavelength around 365 nm, the lower intermediate layer and the ultraviolet transmittance of 4-70% consists of non-woven fabric A multi-layered paper, wherein the multi-layered paper comprises a first luminescent printed image applied on one side of the intermediate layer and the first luminescent paper on the surface of the multi-layered paper. A second light-emitting print image having a light emission color different from the print image, and a third light emission having a light emission color different from that of the first light-emission print image and the second light-emission print image on the back surface of the multilayer laminated paper. The first luminescent printed image, the second luminescent printed image, and the third luminescent printed image are at least partially through the upper layer, the intermediate layer, and / or the lower layer. Overlap Multilayer combination papers which emission printing has been performed, characterized in that the location. The luminescent printed image is a fluorescent printing ink that emits fluorescence when irradiated with a wavelength of ultraviolet long wave having a peak wavelength near 365 nm, a fluorescent printing ink that emits fluorescence when irradiated with a wavelength of ultraviolet medium wave having a peak wavelength near 302 nm, and 254 nm. multilayer combination papers which emission printing is performed according to claim 1 or 2, wherein the printed with at least one fluorescent printing ink fluoresce when irradiated with ultraviolet wavelengths shortwave having a peak wavelength around . The first light-emitting print image, a fluorescent printing ink fluoresce when irradiated with a wavelength of the ultraviolet longwave fluorescence emission when irradiated with the wavelength of the fluorescent printing inks and the ultraviolet short that fluoresce when irradiated with a wavelength of the ultraviolet MF Printed with one of the fluorescent printing inks, the second light-emitting printed image is printed with an ink different from the fluorescent printing ink printed with the first light-emitting printed image, and the third light-emitting printed image is paper making multi-layered light-emitting printing is performed according to claim 2 or 3, wherein the printed in different inks and fluorescent printing ink was printed by the first light-emitting print image and the second light-emitting print image Laminated paper. 5. The light emitting printing according to claim 1, wherein the fourth light emitting printing image is provided on the other surface of the intermediate layer not subjected to the first light emitting printing image. Multi-layered laminated paper. The light emitting printing according to claim 1, 2, 3, 4, or 5, wherein the intermediate layer is mixed or printed with one or more of optical, electrical or magnetic specific substances. Multi-layered laminated paper.

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