JPH08334917A - Thermal transfer paper for copying - Google Patents

Abstract

PURPOSE: To make it possible to directly thermally transfer designs to a fabric with good air permeability by laminating a top coating layer consisting of a thermoplastic resin on the surface of an undercoating layer compounded with a thermoplastic resin and wax resin at a specific ratio. CONSTITUTION: The surface of a paper substrate sheet 3, such as wood free paper, is provided with the undercoating layer consisting of the resin compsn. prepd. by compounding the thermoplastic resin and the wax resin at a solid content ratio by weight of 10:(1 to 10) and the top coating layer l consisting of thermoplastic resin is laminated thereon. The thermoplastic resin compounded with the undercoating layer 2 includes an ethylene-vinyl acetate copolymer resin, etc., and the wax resin includes polyethylene wax, etc. An antistatic agent, such as polypyrrole, is preferably incorporated into the resin compsn. constituting the undercoating layer 2. Thereby, the direct thermal transfer of the designs copied on the thermal transfer paper to the fabrics of T-shirts, etc., with good hand is made possible and the fabric surface transferred with the designs has air permeability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer paper for copying, and more specifically, a pattern copied on the thermal transfer paper can be directly transferred to a cloth such as a T-shirt by a heat press, and the transferred cloth is breathable. In addition, the present invention relates to a thermal transfer paper for copying which has a small amount of resin transferred in a portion where there is no toner and can transfer a pattern having a good texture.

[0002]

2. Description of the Related Art Conventionally, a thermal transfer paper on which a pattern is printed is transferred to a cloth such as a T-shirt by a heat press to easily transfer the pattern to the cloth. Recently, with the spread of high-performance color copiers, it has become possible to easily copy the desired pattern. Copying the pattern on the transfer paper with the color copier, and then thermally transferring this pattern to the cloth is performed. . Conventionally, as thermal transfer paper for copying, copy paper (paper in which thermoplastic resin is thinly coated on release paper),
A combination of three sheets of resin-coated paper (paper in which a large amount of resin is coated on release paper) and release paper is commercially available. This is done by making a copy with copy paper, lightly transferring it to the cloth, then covering it with resin-coated paper and heat-pressing, and finally putting release paper and heat-pressing to fix the toner to the cloth. Since it is a system, the work is complicated, and the finished product is overcoated with resin, so there is a drawback that it has no breathability and poor texture. Recently, a type that can handle one sheet has been put on the market, but problems such as poor copyability, poor air permeability after transfer, and difficulty in washing due to toner loss during washing There is.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation of the prior art, in which a pattern copied on a thermal transfer paper can be directly thermal transferred to a cloth such as a T-shirt,
An object of the present invention is to provide a thermal transfer paper for copying, which has air permeability on the transferred cloth, and has a small amount of resin transferred in a portion where there is no toner, and on which a good textured pattern can be transferred.

[0004]

Means for Solving the Problems As a result of intensive studies for solving the above problems, the present inventors have found that a thermoplastic resin and a wax-based resin are added to the surface of a paper base sheet at a solid content weight ratio of 10%. It was found that the above problems can be achieved by providing an undercoat layer made of a resin composition blended with 1 to 10 and laminating a topcoat layer made of a thermoplastic resin on the surface of the undercoat layer. Based on this, the present invention has been completed.

That is, according to the present invention, a thermoplastic resin and a wax resin are added to the surface of a paper base sheet in a solid content weight ratio of 1 to 1.
A thermal transfer paper for copying, characterized in that an undercoat layer made of a resin composition blended with 0: 1 to 10 is provided, and a topcoat layer made of a thermoplastic resin is laminated on the surface of the undercoat layer. It is provided.
Hereinafter, the present invention will be described in detail.

The thermal transfer paper for copying of the present invention is provided with an undercoat made of a resin composition in which a thermoplastic resin and a wax resin are mixed in a solid content weight ratio of 10: 1 to 10 on the surface of a paper base sheet. ing. Examples of the paper base sheet include high-quality paper, art paper, kraft paper, coated paper,
Various papers such as lightweight coated paper and impregnated paper can be mentioned, and preferably high quality paper, coated paper, art paper, impregnated paper and the like. The thickness of the paper substrate sheet is not particularly limited, usually it is sufficient in the range of 10 to 200 g / m ^2, preferably in the range of 30 to 150 g / m ^2.

The thermoplastic resin blended in the undercoat layer is, for example, ethylene-vinyl acetate copolymer resin, polyolefin resin such as polyethylene or polypropylene, vinyl chloride resin, styrene resin, ABS.
Resin, polyvinyl alcohol, acrylic resin, acrylonitrile-styrene resin, vinylidene chloride resin, AA
Examples include various thermoplastic resins such as S resin, AES resin, polyurethane resin, polyvinyl butyral resin and modified products thereof, preferably ethylene-vinyl acetate copolymer resin, styrene resin, acrylic resin, polyurethane resin and modified products thereof. Is.

Examples of the wax resin blended in the undercoat layer include polyethylene wax, polyolefin glycol wax, poly-ε-caprolactone wax, lactone-modified epoxy resin wax, and the like, preferably polyethylene wax and polypropylene wax. is there.

The mixing ratio of the thermoplastic resin to the wax resin is 10: 1 to 10 in terms of solid content weight ratio, preferably 10: 2 to 5 and particularly preferably 10: 3.
~ 4. The thickness of the undercoat layer is usually 1 to 5 g.
It may be in the range of / m ^2, preferably in the range of 2 to 4 g / m ^2. The resin composition forming the undercoat layer preferably contains an antistatic agent. By adding the antistatic agent, it is possible to lower the volume resistivity, improve the toner loading on the copying machine, eliminate toner unevenness, and obtain a clearer copy.

As the antistatic agent, various kinds of antistatic agents can be used. For example, conductive polymer compounds such as polypyrrole, polyaniline, and polymer electrolyte, and conductive particles surface-treated with these antistatic agents, Cationic surfactants such as quaternary ammonium chloride, quaternary ammonium sulfate and quaternary ammonium nitrate, anionic surfactants such as alkyl sulfonates, alkyl phosphates, alkylbenzene sulfonates and alkyl sulfates, Examples thereof include amphoteric surfactants such as alkylbetaine, alkylalanine, and alkylimidazoline, and nonionic surfactants such as polyoxyethylene alkylamine, glycerin fatty acid ester, sorbitan fatty acid ester, and polyoxyethylene alkyl ether. The content of the antistatic agent is preferably 0.1 to 10% by weight of the undercoat layer, and particularly preferably 1 to 5% by weight.

In the thermal transfer paper for copying of the present invention, a topcoat layer made of a thermoplastic resin is laminated on the surface of the undercoat layer. As the thermoplastic resin contained in the top coat layer, the same thermoplastic resin as used in the undercoat layer can be used. This thermoplastic resin is preferably the same as the thermoplastic resin used for the undercoat layer.

The thermoplastic resin forming the top coat layer preferably contains an antistatic agent or is surface-coated. By adding the antistatic agent, the surface resistance and the volume resistivity can be reduced, the toner can be easily loaded on the copying machine, the toner unevenness can be eliminated, and a clearer copy can be obtained. As the antistatic agent, the same ones as described above can be used. The content of the antistatic agent is usually preferably 0.1 to 10% by weight, particularly preferably 1 to 5% by weight. The thickness of the top coat layer is not particularly limited, but is usually in the range of 10 to 100 μm, preferably 10 to 30 μm.

In the thermal transfer paper for copying of the present invention, it is preferable to provide a moisture-proof layer on the back surface of the paper base sheet. By providing the moisture-proof layer, it is possible to prevent the thermal transfer paper for copying from curling at the time of feeding and discharging when copying with a copying machine. As the moisture-proofing agent constituting this moisture-proofing layer, various moisture-proofing agents can be used, and examples thereof include polyolefin resins such as polyethylene and polypropylene, vinyl chloride resins, styrene resins, ABS resins, acrylic resins, acrylonitrile-styrene resins, vinylidene chloride. Resin, AAS resin, AE
S resin, polyurethane resin, poly-4-methylpentene-1 resin, polybutene-1 resin, vinylidene fluoride resin, vinyl fluoride resin, fluororesin, polycarbonate resin, polyamide resin, acetal resin, polyphenylene oxide resin, polybutylene terephthalate , Polyester resin such as polyethylene terephthalate, polyphenylene sulfide resin, polyimide resin, polysulfone resin, polyether sulfone resin, aromatic polyester resin, polyarylate resin and the like, and various thermoplastic resins such as modified products thereof, metal foil such as aluminum foil , And the like, preferably vinylidene chloride resin,
Examples thereof include styrene resin and acrylic resin.

The moisture-proof layer preferably contains an antistatic agent. By adding the antistatic agent, the surface resistance and the volume resistivity can be reduced, the toner can be easily loaded on the copying machine, the toner unevenness can be eliminated, and a clearer copy can be obtained. As the antistatic agent, the same ones as described above can be used. The content of the antistatic agent is usually preferably 0.1 to 10% by weight, particularly preferably 1 to 5% by weight. The thickness of the moisture-proof layer is usually 1 to 1.
The range may be 0 g / m ² , preferably 2 to 6 g /
It is in the range of m ² . The undercoat layer, the top coat layer and the moisture-proof layer may contain various additives such as an antioxidant, an ultraviolet absorber and a plasticizer.

The method for producing a thermal transfer paper for copying according to the present invention comprises:
It is carried out by successively laminating an undercoat layer and a topcoat layer on the surface of the paper base sheet. When the moisture-proof layer is provided on the back surface of the paper base sheet, it may be provided on the paper base sheet before the undercoat layer and the top coat layer are sequentially laminated on the surface of the paper base sheet. An undercoat layer and a topcoat layer may be sequentially laminated on the surface of the sheet and then provided on the paper base sheet. Examples of the method for laminating the undercoat layer and the topcoat layer on the surface of the paper base sheet include various laminating methods such as coating, laminating and laminating. As a method for providing the moisture-proof layer on the back surface of the paper base sheet, for example, a method such as coating or laminating can be mentioned. Coating is performed by various coating means such as a roll coater, an air knife coater, a die coater, a comma coater, a knife coater, or a spray coater, which is a dispersion or solution obtained by dispersing or dissolving the components constituting each layer in water or a solvent. It can be performed by printing means.

Examples of the material to which the thermal transfer paper for copying of the present invention can be thermally transferred include clothes such as T-shirts and cloth. The method of thermally transferring the thermal transfer paper for copying of the present invention to a transfer target is performed by forming various patterns such as patterns and letters with toner on the surface of the top coat layer of the thermal transfer paper for copying of the present invention by copying, and It is carried out by pressing the material to be transferred, thermocompression bonding, and then peeling off the heat transfer paper while it is hot. The thermal transfer of the thermal transfer paper for copying of the present invention can be performed by various thermal press machines such as an automatic heat press machine, a manual heat press machine, and an iron. The temperature of thermal transfer is not particularly limited and may be selected according to the softening point of the thermoplastic resin used for the thermal transfer paper for copying. Usually, the temperature of thermal transfer is in the range of 100 to 200 ° C, preferably 140 to 180 ° C. The thermal transfer time is not particularly limited, but is usually 1 second to
It is 5 minutes, preferably 5 seconds to 1 minute.

[0017]

As described above, the thermal transfer to the cloth by the thermal transfer paper for copying of the present invention is carried out by forming a pattern with toner on the surface of the top coat layer of the thermal transfer paper for copying of the present invention,
It is carried out by pressing the design surface against a cloth, thermocompression bonding, and then peeling off the heat transfer paper while it is hot. When the thermal transfer paper is peeled off, a layer is formed in the portion on which the toner is placed by the undercoat layer or the topcoat layer close to the undercoat layer, and a large amount of resin film is formed on the surface of the toner transferred to the cloth. In the non-covered area, layering occurs near the surface of the top coat layer, and only a small amount of the resin coating is formed on the cloth. This is because the wax-based resin contained in the undercoat layer does not easily migrate to the topcoat layer in the portion where the toner is placed, and thus the undercoat layer or the topcoat layer close to the undercoat layer is layered, and It is presumed that the low softening point thermoplastic resin migrates to a portion near the surface of the topcoat layer in the portion where the mark is not present, and thus layering occurs near the surface of the topcoat layer. Due to such an effect, the texture of the pattern transferred to the fabric is extremely excellent, and the breathability of the transferred portion of the fabric is also excellent.

[0018]

EXAMPLES Next, the present invention will be described more specifically by way of examples. The present invention is not limited to these examples.

Example 1 Ethylene-vinyl acetate resin as a thermoplastic resin (trade name: Aquatex HA1100, Chuo Rika Kogyo Co., Ltd.)
Made) and polyethylene wax (trade name: Permalian PN, manufactured by Sanyo Chemical Industry Co., Ltd.) as a wax-based resin, and Chemistat 6120 (trade name, manufactured by Sanyo Chemical Industry Co., Ltd.) as an antistatic agent in a weight ratio of 10: A dispersion liquid (solid content: 20% by weight) blended in a ratio of 3: 0.26 was produced. A roll coater was used to disperse this dispersion into a piece of general high-quality paper (8
0 g / m ² ) coated on one side with a thickness of 3 g / m ² after drying,
After drying, an undercoat layer was provided on one side of a general high-quality paper. Next, an ethylene-vinyl acetate resin for extrusion (trade name: Hirodyne 7575, manufactured by Hirodyne Industry Co., Ltd.) is melt-kneaded by an extruder and extruded from a T-die, and laminated on the surface of this undercoat layer to have a thickness of 25 μm. Of the top coat layer.

Next, vinylidene chloride resin (trade name: Sarantex L536B, manufactured by Asahi Kasei Kogyo Co., Ltd.) and Chemistat 6120 (trade name, manufactured by Sanyo Kasei Co., Ltd.) as an antistatic agent are used at a weight ratio of 10: 0. A dispersion liquid (solid content: 20% by weight) blended in a ratio of 0.20 was produced. This dispersion was applied by a roll coater to the back surface of the above-obtained laminate of general high-quality paper to a dry thickness of 4 g / m ² , and dried to form a moisture-proof layer. FIG. 1 shows a cross section of a thermal transfer paper for copying obtained by the above method. An undercoat layer 2 is provided on one surface of a paper base sheet 3, and the undercoat layer 2 has a top surface. The coat layer 1 is laminated. On the other hand, the moisture-proof layer 4 is provided on the back surface of the paper base sheet 3.

FIG. 2 is a cross-sectional view showing a pattern copied on a thermal transfer paper for copying obtained by the above method by a color copying machine. The pattern is formed on the surface of the top coat layer 1. Toner 5 is on. The copy transfer paper on which the above pattern was copied was placed on a T-shirt cloth and heat-pressed at 160 ° C. for 15 seconds with a heat-pressing machine. Next, the T-shirt was taken out from the heat press, the heat transfer paper was peeled off, and the design was transferred to the T-shirt. The transferred pattern surface did not shine, and had a good texture and a texture close to that of printing finish. Furthermore, the breathability of the design surface is good,
The washability was also good.

[0022]

According to the thermal transfer paper for copying of the present invention, the transferred cloth has air permeability, and the portion without toner has a small transfer amount of resin, and a good textured pattern can be transferred. Furthermore, the toner does not fall off during washing, the texture of the pattern is good even after repeated washing, and the washability is excellent.

[Brief description of drawings]

FIG. 1 is a sectional view showing a thermal transfer paper for copying which is an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a copy of a thermal transfer paper for copying which is an embodiment of the present invention and is provided with a pattern by copying with a color copying machine.

[Explanation of symbols]

 1 Topcoat layer 2 Undercoat layer 3 Paper base sheet 4 Moisture-proof layer 5 Toner

Claims (4)

[Claims] 1. An undercoat layer comprising a resin composition in which a thermoplastic resin and a wax resin are mixed in a solid content weight ratio of 10: 1 to 10 on the surface of a paper base sheet,
A thermal transfer paper for copying, wherein a topcoat layer made of a thermoplastic resin is laminated on the surface of the undercoat layer. 2. The thermal transfer paper for copying according to claim 1, wherein the resin composition of the undercoat layer contains an antistatic agent. 3. The thermal transfer paper for copying according to claim 1, wherein a moisture-proof layer is provided on the back surface of the paper base sheet. 4. The thermal transfer paper for copying according to claim 3, wherein the moisture-proof layer contains an antistatic agent.