JP4464896B2 - Colored paper sheet products - Google Patents

Description

  The present invention relates to paper sheet products such as kitchen paper, toilet paper, and tissue paper, and more particularly to a paper sheet product that has been colored.

In general, paper sheet products such as tissue paper, toilet paper, kitchen paper, and decorative paper are provided to consumers in the form of a single sheet of paper or a stack of two or more sheets. .
By the way, in general, human beings are easily influenced by the visually recognized visual image, and, for example, products with excellent cosmetics are easy to purchase without resistance. For this reason, in order to improve the visual image, pattern printing using various color inks may be performed on the base paper sheet. Since this pattern printing can impart color, it further contributes to the improvement of cosmetics, and can further increase the consumer's willingness to purchase (see, for example, Patent Document 1).
International Publication 2005 / 0554577A1

However, the conventional colored products have problems such as lack of elegance and poor sensitivity due to being too vivid or too blurry.
Therefore, a main object of the present invention is to provide a product that is elegant, highly likable, and can further enhance the consumer's willingness to purchase.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
The watermark base paper is superimposed on at least one side of the colored base paper,
Each base paper is subjected to micro embossing having an embossing depth of 0.2 to 2.0 mm at an embossing density of 30 to 100 pieces / cm ² ,
At least one of the base papers is overlapped on a part of the micro emboss, and has an emboss density of 0.1 to 5 pieces / cm ^{2 and} an emboss depth of 0.3 to 2.5 mm deeper than the micro emboss. Design embossing with embossing depth of is given,
Each base paper is bonded with an adhesive colored on the top of the convex portion of the pattern embossing,
Further, on the side of the watermark base paper, the L value of the Hunter color system defined by JIS Z 8729 is 80 to 95, the a value is -4 to +7, and the b value is -4 to +3, respectively. The tsubo is 13-25 g / m ² and the opacity specified in JIS P 8149 is 30-80%.
A colored paper sheet product characterized by that.

<Invention of Claim 2>
The colored paper sheet product according to claim 1, wherein the colored base paper is colored by printing on at least one side surface.

<Invention of Claim 3>
The colored paper sheet product according to claim 1 or 2, wherein the colored base paper is colored by adding a dye to a pulp raw material.

<Invention of Claim 4>
A watermark base paper to which micro embossing having an emboss depth of 0.2 to 2.0 mm at an emboss density of 30 to 100 pieces / cm ² is applied , or a sheet obtained by laminating this watermark base paper;
A watermark base paper to which a pattern embossing having an embossing depth of 0.3 to 2.5 mm deeper than the micro embossing at an embossing density of 0.1 to 5 pieces / cm ² was applied, or this watermark base paper was laminated. The sheet is overlaid,
Adhered by a colored adhesive applied to the top of the design emboss,
And the L value of the Hunter color system defined in JIS Z 8729 on at least one side of the front and back is 80 to 95, the a value is -4 to +7, the b value is -4 to +3, and the watermark base paper A colored paper sheet product, characterized in that the basis weight is 13 to 25 g / m ² and the opacity specified in JIS P 8149 is 30 to 80%.

<Invention of Claim 5>
The colored paper sheet according to claim 1, wherein the watermark base paper is uncolored.

As is well known, in the Hunter color system defined in JIS Z 8729, the L value is called the brightness index, and the a value and the b value are called the perceptual chromaticity index. In the present invention, the L value, the a value, and the b value on at least one side of the front and back sides are within a specific range, and the color of the colored portion (colored base paper or colored adhesive) appears on the outer surface through the watermark base paper. As will be apparent from the examples to be described later, it is particularly elegant and has high sensitivity.
In addition, when printing is used for coloring in the form in which the watermark base paper is superimposed on the colored base paper, the tastes on the front and back surfaces can be made different or the same. On the other hand, when the dye is added to the pulp raw material of the colored base paper and colored, the taste on the front and back surfaces can be made the same.
On the other hand, the watermark base paper of the present invention may be colored, but uncolored paper is preferable because final color adjustment becomes easy. In that case, the basis weight is 13 to 50 g / m ² , and JIS It is preferable that the opacity specified in P8149 is 30 to 80% because an elegant watermark is obtained.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
(About the base paper)
As the base paper, a base paper obtained by papermaking a raw pulp in which pulps such as NBKP, LBKP, BCTMP, and waste paper are blended at a ratio corresponding to a target product is used.
Specific physical properties of the base paper include a longitudinal strength (MDT) of 200 to 400 CN / 25 mm and a lateral strength (CDT) of 50 to 150 CN / 25 mm when the sheet product is toilet paper or tissue paper. (MDS) is preferably 10 to 30% (measurement conforms to JIS P 8113). In addition, in the case of sheet products that require strength (paper towels, napkins), the longitudinal strength (MDT) of a one-ply paper sheet (base paper) is 120 to 700 CN / 25 mm, and the lateral strength (CDT) is 45 to 270 CN / It is preferably 25 mm, and the longitudinal elongation (MDS) is preferably 5 to 30% (measurement conforms to JIS P 8113). When the strength of the base paper is below these lower limits, sheet breakage or the like occurs, and when it exceeds the upper limits, the texture deteriorates. When the elongation of the sheet is less than or equal to these lower limit values, the sheet breaks or the like.
The watermark base paper may be lightly colored in addition to the color of the uncolored pulp itself. In the latter case, it is preferable that the rice floor is 13 to 50 g / m ² because an elegant watermark is obtained. The weight of the colored base paper can be determined as appropriate according to the number of base papers stacked and the type of product, and the color is not particularly limited. Furthermore, the watermark base paper preferably has an opacity of 30-80% as defined in JIS P 8149. If it is smaller than the lower limit, the colored base paper or the printed part by coloring may be too vivid and the quality may be lost. On the other hand, if the value is larger than the upper limit value, the degree of watermark deteriorates and the image becomes too blurred.
The sheet product according to the present invention is in a form in which a plurality of base papers are stacked, but the number of sheets is not particularly limited, and may be appropriately changed to, for example, 2, 3, 4 or more. it can. However, since it is desirable that the number is 2 or 3 in terms of coloring visibility, an example thereof will be described below.

(Structural example 1)
1 and 2 show an example of a three-layer structure in which watermark base papers S3 and S5 are superimposed on both sides of the colored base paper S0. Although not shown, one or more other watermark base papers can be further stacked on the front or back surface to form four or more layers.

  In the example shown in FIG. 1, the colored base paper S0 is colored by printing P after paper making. The printing P can be performed on one side of the base paper S0 as shown, or on both sides although not shown. Further, the printing P can be applied to the entire coloring target surface as shown in the drawing, or can be applied to a part of the coloring target surface (not shown). In such a printing form, the degree of coloring of the front and back surfaces can be freely adjusted, and for example, coloring can be performed only on one surface as shown in the figure.

  On the other hand, FIG. 2 shows the case of colored base paper S0 colored by adding a dye to the pulp raw material. In this case, the entire colored base paper S0 is uniformly colored. Although not shown in the figure, coloring can be performed by combining printing with dyeing of raw pulp.

  When dyeing with a dye, add a cationic softener (and if necessary, a cationic paper strength agent) first to bind to the pulp, and then add an anionic dye to give a soft texture. This is preferable. For example, a pulp raw material and, for example, a pulp raw material and a cationic softening agent (including a cationic paper strength agent if necessary) are blended in the machine tank, and the dye is placed in front of the machine tank, the seed box, and the fan pump. It can be colored by blending.

  As the softener, fatty acid ester softener (US Pat. No. 3,296,065), quaternary ammonium salt type cationic softener (Japanese Patent Laid-Open No. 48-22701), urethane alcohol or a salt thereof, Or a cationized product (JP-A-60-139897), a non-cationic surfactant (JP-A-2-99690, JP-A-2-99691), a polyphosphate (JP-A-2-36288). And polysiloxane (JP-A-2-224626 and JP-A-3-900). Particularly preferred softeners are quaternary ammonium salt type cationic softeners and / or fatty acid ester softeners, all of which exhibit cationic properties. The dye is an azo dye exhibiting anionic property. If necessary, a dye fixing agent can be used in combination. Examples of paper strength agents (wet strength agents) include amino resins such as urea-formaldehyde resins and melamine-formaldehyde resins, polyamide epichlorohydrin resins, and dialdehyde starch.

  The blending amount of the softening agent, paper strength agent (wet paper strength enhancing agent), and dye is 0 to 15 kg / t (preferably 0.3 to 3.0 kg / t) of softening agent per ton of paper. The strength agent is 0 to 25 kg / t (preferably 1.0 to 5 kg / t), and the dye is 0.05 to 15 kg / t (preferably 0.1 to 2 kg / t). For these materials, when the upper limit is exceeded, there is a problem that the paper strength is too low in the case of the softening agent, the paper becomes hard in the case of the paper strength agent, and the color is too dark (darkening) in the case of the dye. . In addition, when the dye content is less than the lower limit, there arises a problem that the color becomes light (not vivid).

  In the sheet product thus configured, the color of the colored base paper S0 appears on the outer surface through the watermark base papers S3 and S5, so that it becomes rich in elegance. In the case of single-sided printing, when viewed from the side opposite to the printing surface side, the colored base paper S0 itself also constitutes a part of the watermark.

  Further, when the colored base paper S0 is manufactured, sheet products having different front and back tastes can be obtained by performing single-sided printing or printing P with different front and back sides, or making the color and transparency of the watermark base paper different between the front and back sides. On the other hand, when the colored base paper S0 is manufactured, if the same printing P is applied to both sides or dyeing is employed and the color and transparency of the watermark base paper are the same, the sheet product having the same front and back taste may be obtained. it can.

(Structural example 2)
3 and 4 show examples of the structure in which the watermark base paper S3 is overlapped only on one side of the colored base paper S0. FIG. 3 shows a form colored by printing P, and FIG. 4 shows a form colored by dyeing raw pulp. The specific configuration of printing and dyeing is the same as that of Structural Example 1. When printing P is performed on one side of the colored base paper S0, the watermark base paper S3 is overlaid on the print surface as shown in FIG. 3, and although not shown, the watermark base paper can be overlaid on the non-print side to expose the print surface.

  In the second structural example, as shown in FIG. 3, when printing P is performed on one side of the colored base paper S0 and the watermark base paper S3 is overlapped on the printing surface, the colored portion is the watermark base paper S3 from the watermark base paper S3 side. And from the opposite side through the colored base paper S0 itself, it appears on the outer surface, so that it becomes rich in elegance. In this case, the front and back of the sheet product can be made substantially the same or close to the same taste, but it is suitable for different tastes.

  Further, as shown in FIG. 4, when the colored base paper S0 obtained by dyeing raw pulp is used, the colored portion appears on the outer surface through the watermark base paper S3 from the watermark base paper S3 side and directly from the opposite side. Become. In this case, it is suitable for the case where the front and back sides of the sheet product are remarkably different in color vividness. The same applies to the case where printing is performed on one side of the colored base paper S0 and the watermark base paper S3 is superimposed on the non-printing side to expose the printing side.

  On the other hand, as shown in FIG. 5, two or more watermark base papers S3 and S4 can be overlapped on one side of the colored base paper S0 to form a structure having three or more layers as a whole. In this case, the degree of watermark can be adjusted by the number of watermark base papers S3 and S4.

(Structural example 3)
6 to 8 show a form in which two watermark base papers S1 and S2 are overlapped and bonded with colored adhesives G1 and G2. The sheet product X of the present embodiment is a micro emboss (first embossing) having an embossing density of 30 to 100 pieces / cm ² and an embossing depth of 0.05 to 2.0 mm on two superimposed base papers S1 and S2. Emboss) M is given. In FIG. 6, the whole is drawn in a grain shape, but each point is drawn to correspond to a micro emboss (first emboss) M.

  These base papers S1 and S2 face each other, and as shown in FIG. 7, the micro-embossed convex surfaces and the concave surfaces face each other close to each other. Design embossing (the embossing density is sparser and the embossing depth is deeper than the microembossing M) E1 and E2 are formed on the base paper S1 and S2 on a part of the microembossing M. The design embosses E1 and E2 are formed so as to overlap the microemboss M of the base papers S1 and S2. The base papers S1 and S2 are joined at this overlapping portion. FIG. 7 is a diagram for explaining the principle. In reality, these shapes including the microemboss M in the embossed portions E1 and E2 of the design are such that the corners of the illustrated shape are broken. I will add.

  In this embodiment, as shown in FIG. 9, a “flower” pattern emboss E1 is given to the base paper S1, and a “leaf” pattern emboss E2 is given to the base paper S2. The design embossing is not particularly limited in size, shape, etc., and logo marks, numbers, characters, geometric patterns, etc. can be appropriately selected.

  In this way, each of the base papers S1 and S2 is individually subjected to the design embossing E1 and E2 processing, and the microembosses face each other, so that the bulk of the sheet product S formed by superimposing the base papers S1 and S2 is increased. Property is improved, and the absorbency and softness of the sheet are improved.

  On the other hand, the convex tops Et of the pattern embosses E1 and E2 have a color different from the base color of the base paper (of course, when the hue is different, only the saturation and lightness are different, the base color of the base paper and the colored paste application portion) In this case, the adhesives G1 and G2 are applied to the base paper S1 and S2, and the two base papers S1 and S2 are bonded to each other by the adhesives G1 and G2. In this embodiment, the red adhesive G1 is applied to the convex head top portion Et1 of the floral pattern emboss E1, and the green adhesive G2 is applied to the convex head top portion Et2 of the petal pattern emboss E2.

  The colored adhesives G1 and G2 are visually recognized from the front and back surfaces F and B of the sheet product X through the base papers S1 and S2, so that the design embosses E1 and E2 are visually recognized as colored designs. Is done. That is, it is visually recognized as a design in which the embossing of the red floral pattern and the embossing of the green leaf pattern are integrated.

  In this case, since the adhesives G1 and G2 are visually recognized from the front and back surfaces of the sheet product X, the design is configured. Therefore, the adhesives G1 and G2 are sufficiently clear from the front and back surfaces of the sheet product X. It is preferable that the opacity of the base papers S1 and S2 based on JIS P 8149 is 30 to 80%, preferably 60 to 70% so as to be visible. With this level of opacity, the color of the adhesive can be clearly recognized from the front and back surfaces of the sheet product.

  As specific examples of the adhesives G1 and G2, for example, an adhesive component such as PVA (polyvinyl alcohol) or CMC (carboxymethyl cellulose) that is colored with a coloring component such as a pigment can be used. When using a pigment, the pigment in the colored adhesive is preferably 0.01 to 50% by weight. If the pigment content is low, the embossed part of the pattern becomes mottled, making it difficult to show the design sharply (clearly), and fading of color tends to occur. There is a risk that it becomes difficult to satisfy the peel strength condition and color bleeding tends to occur. The viscosity of the colored adhesive is preferably 1 to 100 mpa, particularly 5 to 30 mpa.

  In the present invention and the present specification, the “adhesive” only needs to contain at least a pigment. For example, an ink itself containing a pigment is also used as an adhesive. Moreover, even if a substance having an adhesive effect such as PVA (polyvinyl alcohol), CMC (carboxymethyl cellulose), or an acrylic resin is separately added, the adhesive of the present invention is used as a whole as long as it contains at least a pigment. However, dye is not included. In the present invention and the present specification, “adhesive” and “colored adhesive” are synonymous.

In addition, the application amount of the adhesives G1 and G2 to the base paper S1 and S2 is preferably 0.01 to 2.0 g / m ² if the sheet product X is a toilet roll, for example. If it exceeds 2.0 g / m ² , it will become stiff, and if it is less than 0.01 g / m ² , adhesion between the base papers will be insufficient. The amount of glue applied can be increased or decreased as appropriate according to the type of sheet product.

  On the other hand, the sheet product X of the present embodiment can be manufactured as follows, for example. From the viewpoint of improving touch, the base papers S1 and S2 are preliminarily subjected to microembossing M processing by a microembossing roll device (not shown) over substantially the entire region of preferably 60% or more, more preferably 90% or more.

  Next, as shown in FIG. 8, each of the base papers S1 and S2 is made of metal convex embossing rolls 1S and 2S and rubber restraining rolls 1R for providing design embossing respectively installed for the base paper S1 and the base paper S2. , 2R are respectively passed through the design embossing rolls 1 and 2, each of which is provided with design embossing E1 and E2. In this embodiment, a “flower” pattern is formed on the metal embossing roll 1, and a “leaf” pattern is formed on the metal embossing roll 2. Each of the embossing of the “flower” pattern on the base paper S 1 and the “leaf” pattern on the base paper S 2. Design embosses E1 and E2 are given, respectively.

  The base papers S1 and S2 pass between the design embossing rolls 1 and 2 and are given embossing E1 and E2. Then, the base papers S1 and S2 are separated from the metal convex embossing rolls 1S and 2S and guided along the rubber holding rolls 1R and 2R. Then, the paste is applied to the embossed convex top portions Et1 and Et2. A pre-colored adhesive is applied by glue units G1 and G2 using a doctor chamber system, and finally transferred and applied by transfer rolls 31 and 32.

  Next, the superimposing roll 4 prevents the floral pattern embossing E1 of the base paper S1 and the leaf pattern embossing E2 of the base paper S2 from overlapping each other, and the convex surface of the micro embossing faces the floral pattern embossing E1 and the leaf pattern embossing E2. Thus, both base papers S1 and S2 are overlapped and bonded.

  Thus, the color of the adhesive G1, G2 is visually recognized from the front and back surfaces F, B of the sheet product X, and the color of the adhesive is provided with the floral pattern emboss E1 colored red and the leaf pattern embossed E2 colored green. A sheet product X having an unprecedented cosmetic appearance in which a design with an embossed pattern is formed is manufactured.

  In addition, if the metal embossing roll which has two or more types of embossing patterns from which an embossing depth (it is also height) differs is used, it is possible to give two or more types of embossing from which height differs. In this case, as can be immediately seen from the transfer system of FIG. 8, the adhesive can be applied only to the embossment having a high embossing height, and the embossed convex top portion to which the adhesive is applied and the adhesive are applied. Unembossed convex tops can be formed.

  In the above embodiment, the design embosses of the base paper S1 and the base paper S2 are different from each other, and the base papers S1 and S2 are overlapped so that the design embosses E1 and E2 do not overlap. FIG. 13 shows a cross-sectional view. In this way, even in the form of the sheet product X2 in which the design embosses E1 and E2 of the same design are given to the base papers S1 and S2 and the design embossings E1 and E2 are overlapped with each other, the base papers S1 and S2 are bonded. Good.

  Here, the present embodiment is particularly effective when applied to toilet paper or tissue paper (including cosmetics).

  That is, conventionally, coloring of the entire sheet and pattern printing with ink are known. However, when embossing the latter pattern printed base paper, the pattern printing is a separate process, or even if the pattern printing is done online, the pattern portion and the embossed portion are linked due to the elongation and error of the base paper. It is practically impossible. Therefore, since there is no relationship between the pattern portion and the embossed portion, the design portion is inevitably dry.

  On the other hand, according to the present invention, since the adhesive colored with pigment is applied to the design embossed part, the uneven part and the coloring are integrated and partitioned from the peripheral region, thereby clarifying the area. It will appear as a modern design.

  Toilet paper or tissue paper is not preferred for extreme or excessive coloration, but according to the present invention, the design embossing is integrated with the colored part so that the design appears. One layer), even if it is lightly colored, it can appear as a clear design.

Toilet paper or tissue paper is preferably a two-ply product, and the basis weight according to JIS P8124 of the one ply is preferably 10 to 25 g / m ² . The reason why the lower limit is defined as 10 g / m ² is that if it is less than 10 g / m ² , it is preferable from the viewpoint of improving softness, but the strength cannot be ensured properly. Further, the upper limit was defined as 25 g / m ^2, when greater than 25 g / m ^2, too hard, because the feel is deteriorated.

As described above, microembossing (first embossing) M having an embossing depth of 0.2 to 2.0 mm at an embossing density of 30 to 100 pieces / cm ² is applied to the base paper.

The design embosses E1 and E2 having a lower embossing density and a deeper embossing depth than the microembossing M are respectively formed on a part of the microembossing M of the base paper S1 and S2. As the design embosses E1 and E2, those having an emboss depth of 0.3 to 2.5 mm at an emboss density of 0.1 to 5 pieces / cm ² are desirable. When the number is small, the cosmetics are poor, and when the number is large, the strength of the paper may be lowered due to the embossing. Furthermore, if the emboss depth is shallow, it is difficult to ensure clarity as a design, and if it is too deep, the touch is impaired.

The area occupied by the design embossing is preferably 0.5 to 30%, particularly 3 to 15% per 1 m ² . If the area ratio is small, it may appear as a design, and if it is too large, it will become an excessive design, which is undesirable as a product design.

  The base papers S1 and S2 are bonded with an adhesive. The peel strength [CN / 50 mm] of the base papers S1 and S2 is preferably 5 to 100. The reason why the lower limit is defined as 5 CN / 50 mm is that when the thickness is less than 5 CN / 50 mm, the base papers S1 and S2 cannot be properly bonded to each other. The upper limit is defined as 100 CN / 50 mm because when it exceeds 100 CN / 50 mm, it becomes too hard as toilet paper or tissue paper and the touch is deteriorated.

  The peel strength is measured according to the tensile test method of JIS P 8113. Among them, it shall be cut into a width of 50 mm in the vertical direction under the standard conditions specified in JIS P8111. After cutting, the sample is peeled in the vertical direction, and the peeled load cell (TG200N, manufactured by Minebea) is fixed to the upper gripping tool and the other to the lower gripping tool. The interval is 8 cm. Next, it is pulled at a rate of 100 mm / min in the vertical direction and further peeled by 5 cm, and the strength at that time is measured to obtain the peel strength.

(Structural example 4)
10 to 12 show a structural example 4 in the case of using a colored adhesive and three watermark base papers. This Structural Example 4 is a sheet product in which three watermark base papers S3, S4, and S5 are overlaid. In this case, the basis weight per ply is preferably 10 to 25 g / m ² .

  This example can be manufactured as shown in FIG. 11, for example. That is, the two base papers S3 and S4 are laminated at an appropriate stage. The laminated sheet SW has a macro emboss E3 having a large area and a deep depth, and a micro emboss E4 having a small area and a shallow depth. For example, it is formed by pressing with a metal convex embossing roll 51S against the rubber holding roll 51R. The pressing of the metal convex embossing roll 51S is preferably 15 to 30 kg / cm. If the pressure is small, the bulk is difficult to be produced, which leads to the cause of inhibiting the liquid absorption. On the other hand, if it is large, the sheet tends to break at the embossed portion of the sheet.

  On the other single base paper S5, a micro emboss having a small area and a shallow depth is formed by pressing the metal pressing embossing roll 61S against the rubber restraining roll 61R.

  In addition, the glue unit G3 and the transfer roll 33 are arranged facing the metal convex embossing roll 51S, and the adhesive G3 colored with the pigment is transferred to the top of the convex part of the macro embossing E3 by the doctor chamber method. Applied.

  The laminated sheet SW on which the macro embossing E3 is formed is guided between the single base paper S5 and the superposing roll 70 facing the metallic convex embossing roll 51S, and as shown in FIG. 12, the laminated sheet SW and the single base paper. S5 is nipped, and both are bonded by the adhesive paste G3. After that, after being wound around a long paper tube, it is made into a toilet paper roll having a narrow width, or led to an inter-holder to be made into a sheet product such as tissue paper.

  Here, it is desirable that the nip clearance between the overlapping rolls 70 facing the metal convex embossing roll 51S is 5 to 200 μm, and the nip pressure is 3 to 20 kg / cm. If the clearance and the nip pressure are small, the adhesiveness is poor. If the clearance and the nip pressure are large, the emboss is deformed, and excessive penetration of the adhesive into the other base paper increases, which causes roughness.

  The formation of the macro emboss E3 and the micro emboss E4 in the structural example 4 can be selected as appropriate, and an example thereof is shown in FIG. The example of FIG. 10 is an example in which a macro emboss E3 is formed in the curve of the inter-defect and the petal portion, and a micro emboss E4 is formed in a region surrounded by the curve of the inter-defect. Therefore, as in Structure Example 3, the macro emboss is not superimposed on the micro emboss, but may be superimposed. The design is not basically limited in the present invention.

  Structure Example 4 is suitable as a toilet paper roll, and the outer surface side of the roll is a laminated sheet SW and the inner surface side is a single base paper S5, which is suitable for impressing the bulkiness to consumers.

  In this structural example 4, a colored adhesive is used only between some of the base papers, but a colored adhesive may be used between all the base papers. As can be seen from this, four or more base papers are used. In the overlapping form, a colored adhesive can be used between a part (one or a plurality) or all of the base papers.

(About color)
As described above, in the present invention, the L value of the Hunter color system is 65 to 100, and the a value and the b value are -10 to +10, respectively, on at least one side of the front and back. Such a color is adjusted by combining the number of base paper layers, the coloring method, the type of color, the color density, the color area, the opacity of the watermark base paper, the color combination of the colored base paper and the watermark base paper, alone or in combination. It can be achieved by selecting.
Further, when the colored base paper and the watermark base paper are bonded in the form in which the color of the colored base paper appears on the outer surface through the watermark base paper as in the structural example 1 and the structural example 2, the hue is adjusted by adjusting the adhesive strength. For example, by weakening the adhesive strength, it is possible to weaken the watermark and improve the elegance.

(Other)
In the present invention, a part or all of the structures in the above structural examples can be combined with other structural examples. For example, embossing can be given in the form of structural examples 1 and 2. Moreover, also in the form of the structural examples 1 and 2, each base paper can be adhere | attached with the adhesive agent containing adhesive components, such as PVA (polyvinyl alcohol) and CMC (carboxymethylcellulose). Moreover, coloring with an adhesive and coloring by printing or coloring by dyeing raw material pulp can be used in combination.

  Measure the L value, a value, and b value by overlaying the watermark base paper on the colored base paper that has been dyed on the entire surface, and have many consumers choose what looks elegant from the watermark base paper side. The results are shown in Tables 1-17. From this result, it was found that those having the watermark structure and color according to the present invention are particularly elegant and have high sensitivity.

  The present invention is suitable for general paper sheet products for wiping such as kitchen paper, toilet paper, and tissue paper.

2 is a cross-sectional view of a sheet product according to Structural Example 1. FIG. 2 is a cross-sectional view of a sheet product according to Structural Example 1. FIG. It is sectional drawing of the sheet product which concerns on the structural example 2. FIG. It is sectional drawing of the sheet product which concerns on the structural example 2. FIG. It is sectional drawing of the sheet product which concerns on the structural example 2. FIG. It is a front view of the sheet product which concerns on the structural example 3. FIG. It is sectional drawing of the sheet product which concerns on the structural example 3. FIG. It is the schematic which shows the manufacturing process of the sheet product which concerns on the structural example 3. FIG. FIG. 10 is an exploded view of a sheet product according to Structural Example 3. It is a front view of the sheet product concerning Structural Example 4. It is the schematic which shows the manufacturing process of the sheet product which concerns on the structural example 4. FIG. It is the schematic which shows the manufacturing process of the sheet product which concerns on the structural example 4. FIG. It is sectional drawing of another sheet product.

  S0 ... colored base paper, S3, S4, S5 ... watermark base paper, G1, G2, G3 ... colored adhesive, 1 ... top surface, 2 ... concave portion, 3 ... ridge line portion.

Claims (5)

The watermark base paper is superimposed on at least one side of the colored base paper,
Each base paper is subjected to micro embossing having an embossing depth of 0.2 to 2.0 mm at an embossing density of 30 to 100 pieces / cm ² ,
At least one of the base papers is overlapped on a part of the micro emboss, and has an emboss density of 0.1 to 5 pieces / cm ^{2 and} an emboss depth of 0.3 to 2.5 mm deeper than the micro emboss. Design embossing with embossing depth of is given,
Each base paper is bonded with an adhesive colored on the top of the convex portion of the pattern embossing,
Further, on the side of the watermark base paper, the L value of the Hunter color system defined by JIS Z 8729 is 80 to 95, the a value is -4 to +7, and the b value is -4 to +3, respectively. The tsubo is 13-25 g / m ² and the opacity specified in JIS P 8149 is 30-80%.
A colored paper sheet product characterized by that.   The colored paper sheet product according to claim 1, wherein the colored base paper is colored by printing on at least one side surface.   The colored paper sheet product according to claim 1 or 2, wherein the colored base paper is colored by adding a dye to a pulp raw material. A watermark base paper to which micro embossing having an emboss depth of 0.2 to 2.0 mm at an emboss density of 30 to 100 pieces / cm ² is applied , or a sheet obtained by laminating this watermark base paper;
A watermark base paper to which a pattern embossing having an embossing depth of 0.3 to 2.5 mm deeper than the micro embossing at an embossing density of 0.1 to 5 pieces / cm ² was applied, or this watermark base paper was laminated. The sheet is overlaid,
Adhered by a colored adhesive applied to the top of the design emboss,
And the L value of the Hunter color system defined in JIS Z 8729 on at least one side of the front and back is 80 to 95, the a value is -4 to +7, the b value is -4 to +3, and the watermark base paper A colored paper sheet product, characterized in that the basis weight is 13 to 25 g / m ² and the opacity specified in JIS P 8149 is 30 to 80%.   The colored paper sheet according to claim 1, wherein the watermark base paper is uncolored.

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