JP3084262B2 - label - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label. A thermal transfer recording system is widely used as a recording system in a printer such as a computer and a word processor. In recent years, a thermal transfer system in which a thermal transfer layer containing a sublimable dye is provided on the surface of a substrate such as polyethylene terephthalate. Attempts have been made to record images such as natural photographic images by using cyan sheets, magenta, yellow, etc., in combination with sheets, and are used, for example, when directly recording images on a CRT display. It is getting. [0003] As such a heat transfer sheet, a resin having high heat resistance such as polyethylene terephthalate or a structure in which a porous paper-like layer made of a polypropylene-based resin is laminated on both sides of a polypropylene-based non-foamed film. There is known a configuration in which paper is used as a base material and a receiving layer is provided on one surface of the base material. [0004] However, the heat transfer sheet using polyethylene terephthalate or the like as a base material has a low transfer image density due to the high rigidity of the base material, and the sheet is fed smoothly in a transfer device. There may be no print misalignment, and as a result, color misalignment occurs when printing multiple times, such as color printing,
There is a disadvantage that a transferred image with high definition cannot be obtained. In the case of a heat transfer sheet based on a polypropylene-based synthetic paper having a three-layer structure having a porous paper-like layer on the screen, a non-foamed film and a porous paper-like layer constituting the base material are combined. Since the heat shrinkage rates are different and each of these layers is not so thick, heat at the time of transfer is transmitted so as to cause the heat shrinkage rate of each layer, and since the heating is performed only in one direction, it is located on the receiving layer side As the degree of heating increases, the substrate curls with the receiving layer side inward, resulting in a disadvantage that good transfer cannot be performed. [0006] The present invention has been made in view of the above points,
Provide a label in which the sheet feeding in the transfer device is performed smoothly, high density, and a clear transfer image without color misregistration can be obtained, and there is no danger of the substrate being curled by heat at the time of transfer. The purpose is to do. [0007] That is, the label of the present invention is:
A base material having a single-layer structure, and a receiving layer provided on one side of the base material for receiving dyes and pigments transferred from the thermal transfer sheet, wherein the base material is made of polyethylene terephthalate and inorganic or organic fine particles. stretching was added and the whole by generating voids this time around fine particles were porous, density 80% or less of the density of the non-foam of the same material, a polyethylene terephthalate film of 60% porosity Become
In addition, a support is provided on the non-receptive layer forming side of the base material via a pressure-sensitive adhesive so that the support can be peeled off. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the label of the present invention, wherein 1 is a substrate having a single-layer structure, 2 is a receiving layer, and 1
An intermediate layer 3 is provided between the and the receiving layer 2 as necessary,
Further, a support 4 is provided on the surface of the substrate 1 on which the receiving layer is not formed. [0010] The substrate 1 is entirely porous . this
The porous substrate 1 can be obtained by adding inorganic or organic fine particles to polyethylene terephthalate and stretching the film, thereby generating a void around the fine particles. The material of the substrate 1 is polyethylene
Phthalate can be used. The thickness of the substrate 1 is preferably about 50 to 200 μm. The density of the substrate 1 (the density obtained by dividing the weight per 1 m ² by the thickness) is 8 times the density of the non-foamed body of the same material.
0% or less, 60% or more. As the material of the receptor layer 2, any material which has been conventionally used for the receptor layer of this type of heat-receiving sheet can be used. ) To (e) may be used alone or in combination of two or more. (A) Those having an ester bond. Polyester resin, polyacrylate resin, polycarbonate resin, polyvinyl acetate resin, styrene acrylate resin, vinyl toluene acrylate resin. (B) Those having a urethane bond. Polyurethane resin and the like. (C) Those having an amide bond. Polyamide resin (nylon). (D) Those having a urea bond. Urea resin and the like. (E) Others having a highly polar bond. Polycaprolactone resin, polystyrene resin, polyvinyl chloride resin, polyacrylonitrile resin, etc. Alternatively, the receiving layer 2 may be composed of a mixed resin of a saturated polyester and a vinyl chloride / vinyl acetate copolymer. Vinyl chloride / vinyl acetate copolymer resin
With a vinyl chloride component content of 85 to 97% by weight and a degree of polymerization of 20
Those having about 0 to 800 are preferable. The copolymer is not limited to a vinyl chloride / vinyl acetate copolymer alone, but may contain a vinyl alcohol component, a maleic acid component and the like. Further, it may be composed of a styrene-based copolymer such as a styrene-acrylonitrile copolymer, styrene and maleic anhydride copolymer. If necessary, the receiving layer 2 may contain a release agent such as an ultraviolet absorber or silicone oil. Further, if necessary, the receiving layer 2
A release agent layer made of silicone oil or the like may be provided on a part of or the entire surface of the substrate. The intermediate layer 3 can be made of a resin such as polyester, vinyl chloride-vinyl acetate copolymer, acrylic resin, polyvinyl acetate and the like. When the intermediate layer 3 is provided, the print density can be further increased by this cushioning property. [0018] As the support 4, synthetic films, cellulose fibers, etc. of the white synthetic resin film or coated paper or cast-coated paper or the like for the additional inclusion of pigments such as titanium white is used as the above synthetic resin, a polyester
(Eg, polyethylene terephthalate, etc.), aliphatic poly
Amides (eg, 6-nylon, etc.), aromatic polyamides,
Polycarbonate, polyarylate, polyether sal
Phone, polyether ether ketone, polyether ether
Although high heat resistance such as imide and polyimide is preferable,
Polyolefins such as polyethylene and polypropylene,
Polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol
, Acrylic resin, cellulosic resin, styrene resin
Resin, ethylene-vinyl acetate copolymer, ethylene-vinyl
Alcohol copolymers, ionomers and the like are used, but other resins may be used. The support 4 synthetic resin film, when configuring a white synthetic resin film, Poriesu
Ter (for example, polyethylene terephthalate etc.), aliphatic
Polyamide (for example, 6-nylon), aromatic polyamide
, Polycarbonate, polyarylate, polyether
Sulfone, polyetheretherketone, polyether
Those having high heat resistance, such as polyimide and polyimide, are preferable.
Is a polyolefin such as polyethylene or polypropylene
, Polyvinyl chloride, polyvinylidene chloride, polyvinyl
Alcohol, acrylic resin, cellulose resin, styrene
Len-based resin, ethylene-vinyl acetate copolymer, ethylene
-It may be composed of a resin such as a vinyl alcohol copolymer or an ionomer, or may be composed of a resin of a different material. The support 4 is releasably laminated on the substrate 1 and has a function of improving the running property of the sheet in the transfer device at the time of transfer. Removed. The surface of the support 4 is subjected to a release treatment, and the support 4 is detachably provided via a strong adhesive, a heat-sensitive adhesive, or the like applied to the surface of the substrate 1 on which the receptor layer is not formed. After transfer recording on the receiving layer 2, the substrate 1 from which the support 4 has been peeled off is used as a label with an adhesive. A detection mark for positioning in the transfer device at the time of thermal transfer can be printed on the support 4.
Further, on the back surface of the support 4, a lubricating layer made of, for example, an acrylate-based resin or a methacrylate-based resin can be formed, or an antistatic layer can be formed with a surfactant or the like, in order to improve paper passing properties. Hereinafter, the present invention will be described in more detail with reference to specific examples. In the following, unless otherwise specified,
Parts or percentages are by weight. Example 1 A porous polyethylene terephthalate film having a density of about 80% of the density of a non-foamed film (thickness 75
μ, density 1.16 g / cm ³ , manufactured by Teijin Limited: commercially available as [Porous PET]. ) As a substrate, and applying the following composition for forming an intermediate layer to one surface thereof with a Myer bar,
It was dried (application amount after drying: 5 g / m ² ). Composition for forming an intermediate layer Polyester resin (Vylon 200: manufactured by Toyobo) 60 parts Polyester resin (Vylon 600: manufactured by Toyobo) 40 parts Solvent (methyl ethyl ketone / toluene = 1/1) 650 parts The composition for forming a receiving layer having the following composition was applied on the thus formed intermediate layer with a Myer bar and dried (coating amount after drying: 5 g / m ² ) to form a receiving layer. Composition for forming receiving layer Polyester resin (Vylon 200: manufactured by Toyobo) 70 parts Vinyl chloride-vinyl acetate copolymer (manufactured by Union Carbide: Vinyly VYHH) 30 parts Amino-modified silicone (manufactured by Shin-Etsu Chemical: KF- 393) 7 parts Epoxy-modified silicone (X-22-343, manufactured by Shin-Etsu Chemical Co., Ltd.) 7 parts Solvent (methyl ethyl ketone / toluene = 1/1) 700 parts An adhesive (Dai Nippon Ink Chemical Industry Co., Ltd .: Fine Tack SPS-1002) is applied to the coating and dried (applying amount after drying is about 20 g / m ² ), and then bonded to the release treated surface of a commercially available release paper. To form a heat transfer sheet. On the other hand, a 4.5 μm-thick polyester film (Lumirror, manufactured by Toray Industries, Inc.) having a heat-resistant lubricating layer made of a thermosetting acrylic resin provided on one side is used as a base material. The ink composition for forming a thermal transfer layer having the following composition was applied on the surface opposite to the side provided with the ink after drying in an amount of 1 g / g.
m ² to obtain a thermal transfer sheet. Cyan ink composition for forming thermal transfer layer Disperse dye (Kayaset Blue 714: manufactured by Nippon Kayaku) 5 parts Polyvinyl butyral resin (ESREC BX-1: manufactured by Sekisui Chemical) 4 parts Methyl ethyl ketone 46 parts Toluene 45 parts Magenta ink composition for forming thermal transfer layer Disperse dye (MS Red G: manufactured by Mitsui Toatsu Chemicals) (Disperse Red 60) 2.6 parts Disperse dye (Macrolex Violet R: manufactured by Bayer) (Disperse Violet 26) 1.4 parts Polyvinyl butyral resin (ESREC BX-1: Sekisui Chemical) 4.3 parts Methyl ethyl ketone 45 parts Toluene 45 parts [0030] Yellow ink composition for thermal transfer layer formation Disperse dye (Macrolex Yellow 6G: Bayer) (Disperse Yellow 201) 5.5 parts Polyvinyl butyral resin (S-LEC BX-1: manufactured by Sekisui Chemical) 4.5 parts This heat transfer sheet was used together with the heat transfer sheet, and a color video printer having a thermal head with a dot density of 6 dots / mm: VY-50 (manufactured by Hitachi, Ltd.) was used under the following conditions. As a result of printing, the image density was high, there was no color shift of three colors, and after releasing the release paper, it was suitable as a decorative label. Printing conditions Printing speed: 33.3 ms / line feed pitch: 0.166 mm Pulse width: 12.0 ms Head applied voltage: 11.0 V Comparative Example 1 Non-foamed white polyethylene terephthalate film (thickness) A heat transfer sheet was obtained in the same manner as in Example 1 except that 75 μm, a density of 1.42 g / cm ³ , and E-20) manufactured by Toray Industries, Inc. were used. When printing was performed on this sheet in the same manner as in Example 1, the image density was lower than in Example 1, there was roughness in the halftone image, and three color shifts were also recognized. The label of the present invention is stretched by adding inorganic or organic fine particles to polyethylene terephthalate, and at this time, forming a void around the fine particles to make the whole porous, and the density of a non-foamed material of the same material density By using a base material having a single-layer structure made of a porous polyethylene terephthalate film of 80% or less and 60% or more, a high-density transfer image can be formed by a cushioning effect of the base material, and the image is transferred in a transfer device. In such a case, there is no fear that a printing shift due to uneven feeding and a color shift during color printing may occur. Moreover, since the base material has a single-layer structure, there is a possibility that the base material may be curled by heat during printing, as in the case of using a three-layer structure base material in which paper layers are laminated on both sides. It has effects such as no.

[Brief description of the drawings] FIG. 1 is a longitudinal sectional view showing an example of the label of the present invention. [Explanation of symbols] 1 Substrate 2 Reception layer 4 Support

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B41M 5/38-5/40 B42D 15/10 G09F 3/02

Claims (1)

(57) [Claims] A base material having a single-layer structure, and a receiving layer provided on one side of the base material for receiving dyes and pigments transferred from the thermal transfer sheet, wherein the base material is made of polyethylene terephthalate and inorganic or organic fine particles stretching was added and the whole by generating voids this time around fine particles were porous, density 80% or less of the density of the non-foam of the same material, a polyethylene terephthalate film of 60% porosity A label, wherein a support is detachably provided on the side of the substrate on which the receptor layer is not formed, via an adhesive.