JPH0255193A - Sublimated transfer image receiving sheet and manufacture thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a sublimation transfer image-receiving paper and a method for producing the same.
The present invention relates to a sublimation transfer image-receiving paper that is inexpensive and has good performance, and a method for producing the image-receiving paper that is more streamlined than conventional methods.

[Prior art and problems]

Conventionally, a transfer film coated with a dye layer containing a sublimable disperse dye or the like is heated by a thermal head in accordance with an image signal, and the dye is sublimated and dyed onto the image receiving layer of the overlaid sublimation transfer receiving paper. Attempts have been made to form desired images.

However, conventional sublimation transfer image-receiving paper is mainly manufactured by using film-method synthetic paper as the base material and coating and drying polyester resin as the image-receiving layer using a solvent-based coating method. be.

Furthermore, in order to improve the adhesion between the image-receiving layer and the base material, a brimer treatment is performed as a pre-process, and a release agent is coated on the image-receiving layer to improve the releasability from the transfer film. . Furthermore, in order to increase the thickness of image-receiving paper, synthetic paper is expensive, so attempts have been made to bond pulp paper and synthetic paper together, but this results in complicated curling due to changes in the environment.

As described above, the conventional method uses expensive synthetic paper, poses a risk of deterioration of the working environment and explosion due to the use of solvents, and is carried out by a solvent coating method that requires complicated steps. In addition, film method synthetic paper has low edge tear strength and low rigidity, and also has the problem that it becomes uneven due to the heat of the thermal head, causing large curls toward the image side.

On the other hand, attempts have been made to use paper as a base material instead of expensive synthetic paper and provide an image-receiving layer either directly or through a resin layer, but all of these have adopted a one-pack coating method.
The complexity of the above process and the dangers caused by the use of solvents are still unresolved.

[Means for solving problems]

In view of these circumstances, the present inventors have conducted extensive research to solve the above problems, and have streamlined the conventional manufacturing method by providing an image-receiving layer on a paper base material in one step using an extrusion lamination method. The present invention was successfully completed by successfully obtaining a sublimation transfer image-receiving paper that has a low amount of oxidation, high rigidity, and is inexpensive.

That is, the first aspect of the present invention is to provide a sublimation transfer image-receiving paper consisting of a paper base material and an image-receiving layer made of an extruded laminate film provided on an acid base layer. The third aspect of the present invention is a method for producing a sublimation transfer image-receiving paper characterized by extrusion laminating a resin composition to form an image-receiving layer. , and a method for producing a sublimation transfer image-receiving paper, which is characterized in that an image-receiving layer is formed on a paper base material via an adhesive resin layer.

The paper base material used in the present invention includes not only pulp paper but also specially processed paper, such as coated paper, laminated paper, size press processed paper, and super calendered paper. Preferably, a material with excellent surface smoothness is used, and specifically, when an image-receiving layer is provided, a material with a surface smoothness of 5000 seconds or more (Beck value) is suitable.

If the Benk smoothness of the surface is 50 (less than 10 seconds), areas where the image is not transferred (white spots) may occur.

In addition, the lower the tension of the layer, the better the insulation, so the thermal efficiency of the thermal head is better, and the transferred image has a higher density. Low paper and the like are particularly suitable for the present invention.

Any resin can be used for the image-receiving layer as long as it can be extruded and laminated, but polyester resins, polyamide resins, vinyl acetate resins, etc. are preferable in consideration of dyeability. In particular, polyester resins are suitable because they have good processability and are free from unevenness caused by the heat of the thermal head. Furthermore, since disperse dyes do not dye the crystalline portions of polyester resins, polyester resins with little crystallization are particularly suitable. Although these resins can also be used as dyes, more preferable results can be obtained by adding a dye concentration enhancer. Also, if you use a resin with a high glass transition point,
Fading and bleeding due to re-sublimation after dyeing are reduced.

The dye density enhancer used in the present invention refers to a nucleating agent, an internal lubricant, and the like. The nucleating agent may be either an inorganic nucleating agent or an organic nucleating agent, and known inorganic nucleating agents such as talc, silica, and calcium carbonate can be used. In particular, when a nucleating agent with a large oil absorption amount is used, the disperse dye is adsorbed and fixed to the nucleating agent, thereby preventing discoloration and bleeding due to re-sublimation after image formation. Further, organic nucleating agents can be used regardless of whether they are high molecular or low molecular, but those having a curling group (carboxyl group, hydroxyl group, etc.) are suitable for increasing the dye density.

As the internal lubricant, tuffifiers -a are used, and rosin, rosin ester, hydrogenated terpene resin, etc. are suitable. The blending amount of the dye/negativeness enhancer is 1.0 to 10.0 parts by weight per 100 parts by weight of the resin.

The resin composition of the present invention may further contain an antistatic agent and/or an ultraviolet absorber.

An antistatic agent is effective in reducing charging when sublimation transfer image-receiving papers are fed one on top of the other, and in order to improve paper feeding.

As the antistatic agent, nonionic, anionic, cationic, amphoteric surfactants, conductive resins, and the like can be used, but those with a large molecular weight that do not easily evaporate during lamination are preferred.

The blending amount is approximately 0.5 to 3°0 per 100 parts by weight of resin.
This is the range of double stars.

The ultraviolet absorber has the effect of preventing deterioration of the light resistance of the image-formed dye. For example, known ones such as salicylic acid ester type, henzotriadur type, hydroxyhensiphenone type, and acrylonitrile substituted type can be used. The blending amount is approximately 0.5 to 2.0 parts by weight per 100 parts by weight of the resin.

The above resin composition is directly extruded and laminated onto a paper base material to form an image-receiving layer. In this case, in order to facilitate release from the transfer film during transfer, a release agent is usually applied to the surface of the image-receiving layer.

The above coating treatment can be omitted by adding a mold release agent to the resin composition in advance.

There are no particular restrictions on such a mold release agent, but suitable are general silicone oils, silicone resins, and polymeric compounds such as α-olefin adducts of polymethylhydrodienesiloxane.

For extrusion lamination for carrying out the present invention, commonly used methods can be applied. For example, a paper base material is subjected to in-line corona discharge treatment or flame treatment, and an image-receiving resin composition extruded into a film form from a T-die is pressure laminated with a press roll and integrated.

Furthermore, if the adhesive strength between the paper base material and the image-receiving layer is low, it is necessary to interpose an adhesive layer. As this method, either a tandem method or a coextrusion method can be adopted.

When a void structure is formed in the image-receiving layer formed above, the void structure becomes a heat insulating layer, which improves the thermal head efficiency and increases dyeing density.

In addition, since the void structure has cushioning properties, the summer hem contacts the transfer film reliably, resulting in good image formation.

The method for forming a void structure in the image-receiving layer is as follows: 1. Adding a foaming agent to the resin composition of the image-receiving layer and foaming it by heat during extrusion lamination; 2. Containing crystallized water, adsorbed water, etc. in the resin composition. Any known foaming technique, such as blending an inorganic filler and foaming, may be used, and there are no particular limitations.

[Examples] Next, the present invention will be explained in more detail by giving Examples, but the present invention is not limited by these.

Example 1 The resin composition for forming the image-receiving layer contained 93 parts by weight of a polyester resin "Kodabond I'ETG 5116J (manufactured by Eastman Chemical, density 1.33 g/ct, crystal melting point 180°C), and an inorganic filler [ Jilton L
p-75cJ (made by Suikagaku Kagaku, oil absorption N240.l/100
g, average particle size 2.8 μm) 5 parts by weight, mold release agent solicon oil rSH-200J (manufactured by Toray Silicone, 100
(S)) 1 part by weight and the antistatic agent "Electro Stripper TS-64 (manufactured by Kao) 1x 1iNB" were put into a Hensoel mixer (manufactured by Kawuku), triblended, and then kneaded using an extruder rKcK80X2-35VEXJ.
(manufactured by KCK, outlet temperature 240°C) was pelletized. After drying the pelletized resin composition in a dehumidifying dryer (manufactured by Kawata, 120°C x 6 hours), the resin composition was dried in a T-die extruder (
The coated paper "Himano Kinrei Art" (weighing 129 g/m) was supplied with a corona discharge treatment and laminated (thickness 20 I!m) and sublimation transfer was performed using a corona discharge-treated coated paper "Himano Kinley Art" (weighing 129 g/m). Receiving paper was prepared.

Example 2 “Kodabond PET” was used as the resin composition for forming the image-receiving layer.
92.8 parts by weight of G 5116J, "Jilton Lp75
5 parts by weight of "C", 1 part by weight of silicone oil "5H200", 1 part by weight of Electro Stripper TS-6J, and aluminum hydroxide "Hisilite H" as a foaming agent.
-43MJ (Showa light metal type, average particle size 0.6μm
) and 0.2 parts by weight were pelletized and laminated in the same manner as in Example I to produce a sublimation transfer image-receiving paper.

Example 3 “Kodabond PE” was used as a resin composition for forming the image receiving layer.
94 parts by weight of TG 5116J, "Jilton Lp75c"
” and [Electro Stripper TS-6J
1 part by weight was pelletized and laminated in the same manner as in Example 1 to produce a sublimation transfer image-receiving paper.

Next, apply silicone mold release agent rSD7226 on top of this image-receiving layer.
J (manufactured by Torre Silicone) 100 parts by weight and 0.
6 parts by weight mixed solution of toluene and hexane? (1 (toluene:hexane-1:1)), coated (solid content 0.4 g/m), and then heated at 120°C.
The mixture was dried for 1 minute to form a release layer, and a sublimation transfer image-receiving paper was produced.

Comparative example A commercially available sublimation transfer receiver paper was used as a comparison sample.

The image receiving papers of Examples 1 to 3 and Comparative Example 4 were supplied to a Hua transfer printer rVY-25J (Hitachi model),
Sublimation transfer was performed and the results are summarized in Table 1.

As is clear from the results in Table 1, the image-receiving paper according to the present invention has higher rigidity than commercially available image-receiving papers, and has fewer image irregularities and curls. An improvement in the degree of improvement was observed.

[Action/Effect]

As mentioned above, the sublimation transfer image-receiving paper of the present invention has higher rigidity than conventional paper, has no image irregularities, and has less curling after image formation.

In addition, because the extrusion lamination method is used for manufacturing, there is no risk of explosion or contamination of the working environment due to the use of solvents in the coating method. Furthermore, since a -1'lQ paper base material can be used, it is possible to produce a sublimation transfer image-receiving paper that is cheaper than one using a conventional synthetic paper as a base material.

Claims (1)

[Scope of Claims] 1. A sublimation transfer image-receiving paper comprising a paper base material and an image-receiving layer made of an extruded laminate film provided on the base material. 2. The sublimation transfer image-receiving paper according to claim 1, wherein the image-receiving layer is made of a resin composition containing a PET resin and an inorganic filler as main components. 3. The sublimation transfer image-receiving paper according to claim 2, wherein the resin composition contains a dye density enhancer. 4. Claim 2 or 3, wherein the resin composition contains a mold release agent.
Sublimation transfer receiver paper as described. 5. The sublimation transfer image-receiving paper according to claim 2, 3 or 4, wherein the resin composition contains an antistatic agent and/or an ultraviolet absorber. 6. The sublimation transfer image-receiving paper according to claim 1 or 2, wherein the image-receiving layer has a void structure. 7. A method for producing a sublimation transfer image-receiving paper, which comprises extrusion laminating an image-receiving resin composition on a paper base material to form an image-receiving layer. 8. A method for producing a sublimation transfer image-receiving paper, which comprises coextruding an adhesive resin and an image-receiving resin composition onto a paper base material to form an image-receiving layer on the paper base material via an adhesive resin layer. 9. The manufacturing method according to claim 7 or 8, wherein a void structure is formed in the extrusion laminated image receiving layer.