JPS6320720B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat transfer sheet, particularly a heat transfer sheet for textiles and the like.

Conventionally, there is a hot stamp type transfer foil, and the entire surface of the support is coated with a hot melt type adhesive, and when the entire surface is to be transferred, it can be left in that state.
In addition, in the case of letters and line patterns, pressure transfer is performed using a heated letterpress mold, or hot-melt adhesive is not coated on the base material, and a heat-sensitive adhesive is applied to the material to be transferred. It is printed on the entire surface or in a pattern and then transferred. However, it has not yet been possible to find a pattern-shaped adhesive printed on the transfer foil.

With this type of material, if the material to be transferred is woven or knitted material, it is extremely difficult to print the adhesive in a delicate pattern on the material, and even if it is possible to print, The fabric is distorted during transfer, making it difficult to accurately represent the pattern.

FIG. 1 is an explanatory diagram showing the structure of a general hot stamp type transfer sheet, in which a release agent layer 2' is placed on a support 1' (mainly made of polyester film), and an ink layer or vapor deposited layer is placed on top of the release agent layer 2'. Layer 3' is placed on top of which a hot melt type adhesive layer 4' is placed.
It is composed of a coat of When this is transferred to cloth, the structure will be as shown in FIG. 2. a is the transfer material (cloth). In conventional methods, when transferring a pattern, the desired pattern is formed by printing with an ink layer, and the release layer and adhesive layer are either coated over the entire surface, including areas without the pattern, or are coated slightly larger than the pattern. One of the methods used is to apply by printing. However, in this case, the adhesive and release layer protruding from the ink layer are transferred, resulting in an unfavorable appearance.Therefore, there has long been a demand for a transfer sheet that can transfer only the ink layer.

The present invention is an improved method under these circumstances, and its gist is to coat a release agent layer on a foil-like support such as polyester, and to apply a non-tack ink layer thereon. Alternatively, a metal vapor-deposited layer is provided on the ink layer, and a hot-melt type adhesive and a non-tack ink containing a sublimable dye are printed on the ink layer, respectively, or the above-mentioned An ink layer or a metal vapor-deposited layer is provided on the release agent layer, and then a hot-melt adhesive is applied to the entire surface, and a non-tack ink containing a sublimable dye and a non-dye ink are added. A heat transfer sheet is made by printing a pattern on the non-transfer area with a non-tack resin varnish. That is, FIG. 3 and FIG. 4A are cross-sectional explanatory views of the thermal transfer sheet of the present invention, and FIG. 4B is a cross-sectional explanatory view of the transferred object after transfer.

In Figure 3, 1 is a foil-like support such as polyester, polypropylene, or cellophane, and 2 is a release agent layer, which is a synthetic material such as acrylic or polyamide that has releasable properties and does not basically adhere to the support. It is a coating layer of resin or cellulose-based polymer that is applied to the entire surface. 3 is an ink layer, a metal vapor-deposited layer on the ink layer, or a layer consisting only of a metal vapor-deposited layer. 4 is hot melt (heat sensitive)
This is a layer of mold adhesive printed in a pattern. 5 is
This layer is printed in a pattern with non-tack ink containing sublimable dye. An anchor coating is preferably used to provide the metal vapor deposited layer on the release agent layer. When aluminum is vapor-deposited by coloring this anchor coating agent with various coloring dyes or pigments, a colored vapor-deposited film of the desired color can be obtained (for example, when a yellow dye is used, the aluminum vapor-deposited layer exhibits a golden color). ). It goes without saying that the dye or pigment used in this case should be selected to have sufficient resistance to vapor deposition. Note that cellulose-based anchoring agents give good results. In this case, care must be taken because if the solvent used for the release layer, anchor layer, or ink layer is not completely evaporated, it will adversely affect the vacuum deposition of the metal. In addition, when printing patterns with heat-sensitive (hot melt type) adhesive, the adhesive becomes tackier when heated and needs to adhere to the transfer material, which requires a lot of adhesives. The adhesive should be selected based on a thorough knowledge of the material to be transferred, whether it is a film or other material. Generally, acrylic or polyamide synthetic resins, synthetic rubbers, etc. are convenient, and the amount of coating thereof greatly affects the adhesive strength.

In addition, when printing patterns with non-tack ink containing sublimable dyes, the sublimable dyes include disperse dyes, cationic dyes, oil-soluble dyes, etc. Specifically, Diamond Ceritone Pink B , Diamond Seriton Violet 3R (manufactured by Mitsubishi Kasei Corporation),
Sumikaron Yellow E-FG (manufactured by Sumitomo Chemical Co., Ltd.),
Eisen Cation Yellow 3GLH, Eisen Cation Red 6BF (manufactured by Hodogaya Chemical Co., Ltd.), Plastiviolet 8840 (manufactured by Arimoto Chemical Co., Ltd.), etc.
In addition, as the non-tack binder for ink, a cellulose-based binder is preferable, and a release resin such as silicone can also be used.

FIG. 4A is a cross-sectional explanatory diagram showing another example of the thermal transfer sheet of the present invention, in which a release layer 2 is provided on a foil support 1, an ink layer or a metal vapor deposition layer, or a metal vapor deposition layer is provided on the ink layer. The layers 3 are laminated, and a hot-melt adhesive 4 is applied on the entire surface, and each layer is printed with a non-tack ink 5 containing a sublimable dye and a non-tack varnish containing no dye. The materials are similar to the embodiment of FIG.
When the image is transferred using this transfer sheet, the resulting transferred object X becomes as shown in FIG. 4B. That is, (1) since the adhesive 4 is exposed in the areas where the ink 5 and varnish 6 are not present, the release layer 2 and the ink or vapor deposition layer 3 are transferred. (2) In the area where the ink 5 is present, only the dye is transferred to the transfer object, and a permeated image 5' is obtained. (3) No transfer occurs in the area where varnish 6 is present.

Next, examples of the present invention will be described.

Example 1 A 25μ polyester film was coated entirely with acrylic release varnish using a 40μ depth gravure plate, and then an oil dye (yellow) was dissolved in a nitrocellulose vehicle and coated using a 40μ depth gravure plate. Coat the entire surface. Further, aluminum was vacuum-deposited thereon to obtain a releasable transfer foil. On this vapor-deposited surface, a polyamide paint is printed as a hot melt type heat-sensitive adhesive using a gravure plate with a small aperture pattern engraved at a printing depth of 45μ.
Furthermore, a gravure plate with a heart pattern engraved at a plate depth of 45 μm is printed with a non-tack ink made by dissolving Diamond Seriton Pink B in a nitrocellulose vehicle. A transfer sheet has been created that can transfer the image and heart pattern.

For the transfer, two rolls (one made of iron and the other made of rubber, paper, plastic, etc. with cushioning properties) are heated to 160°C. When passed between rolls) at a speed of 3 m/min with a linear pressure of 15 kg/cm, the small aperture pattern was transferred in gold, and only the dye in the heart pattern was transferred, giving it a luxurious appearance. We were able to obtain a transfer-printed cloth.
Although its fastness was slightly weak against dry cleaning, other qualities were equivalent to general pigment-printed fabrics and sufficiently durable for practical use.

Example 2 A release agent was applied to a 25μ polyester film by the method of Example 1, and then the entire surface was gravure printed in a blurred manner using an ink prepared by kneading a pigment into an acrylic high melting point vehicle. A pointillistic floral pattern was printed using a gravure plate with a plate depth of 40μ using a low-melting point polyamide heat-sensitive adhesive, and the non-tack ink containing the sublimable dye used in Example 1 and the plate were used. was used to obtain a transfer sheet.

When this material was transferred to polyester decine using the method of Example 1, the entire pattern was a blurred flower pattern, the ink density of each dot was different, and it had a pink heart pattern, which was conventional. It was a transfer-printed product with a unique taste.

Example 3 After aluminum was vapor-deposited as in Example 1, a heat-sensitive adhesive was applied over the entire surface, and then the non-tack ink containing the sublimable dye used in Example 1 was applied on top of it. Only the non-transferred areas were printed in a pattern with a non-tack varnish containing no dye, and transferred in the same manner as in Example 1. The non-tack varnish is preferably cellulose-based, and release resins such as silicone can also be used.

This transfer sheet is constructed as shown in the cross-sectional explanatory view of FIG. 4. 6 is a non-tack varnish layer.

The materials used in the above should be selected to match the performance of each layer; polyester or stretched propylene film are optimal as the base material (support) for the transfer sheet, and as a release varnish, Of course, flexibility is an essential condition, and consideration must also be given to foil breakage (fewer burrs, etc.), fastness, and deterioration. From this point of view, acrylic resin, polyamide resin, or cellulose-based release varnish is suitable. Further, the colorant layer may be an ink layer with good foil cutting, a metal vapor-deposited layer, or a metal vapor-deposited layer on the ink layer. When simply applying an ink layer, it is desirable that the vehicle used for the ink has strong heat resistance, and it is essential that the ink layer alone will not be transferred to the transfer material during transfer. For this purpose, a foil with good cutting properties that does not produce burrs is suitable, and specifically, acrylic resin or cellulose-based foils are suitable.

Further, as the sublimable dye, the above-mentioned ones can be used, but other dyes can also be used as long as they have thermal sublimation properties.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional diagram showing the structure of a conventional hot stamp type transfer sheet, FIG. 2 is a cross-sectional diagram showing the structure after transfer, and FIG. 3 is a cross-sectional diagram showing the structure of the transfer sheet according to the present invention. Explanatory diagram, Figure 4A
In place of the hot-melt adhesive layer printed in the pattern shown in Figure 3, a heat-sensitive adhesive is applied to the entire surface,
Further, Fig. 4B is an explanatory diagram showing the structure of the transfer sheet when a layer of non-tack ink containing a sublimable dye and non-tack varnish each printed in a pattern is provided thereon. FIG. 3 is a cross-sectional explanatory diagram of a transfer body. DESCRIPTION OF SYMBOLS 1... Foil-like support, 2... Peeling layer, 3... Ink layer or metal vapor deposited layer, or a metal vapor deposited layer on the ink layer, 4... Hot melt adhesive layer, 5... Sublimable dye 6... Non-tack varnish layer, a... Transferred material.

Claims (1)

[Scope of Claims] 1. A release layer is coated on a foil-like support such as polyester, and a non-tack ink layer is formed on the release layer, or a metal vapor-deposited layer is formed on the ink layer, or only a metal vapor-deposited layer is formed. A heat transfer sheet formed by providing a layer and printing thereon with a hot-melt adhesive and a non-tack ink containing a sublimable material and a cellulose-based or silicone-based binder. 2. A release layer is coated on a foil-like support such as polyester, and an ink layer, a metal vapor-deposited layer on the ink layer, or a layer consisting only of a metal vapor-deposited layer is then provided, and then a hot-melt adhesive is applied. After coating the entire surface, a non-tack ink containing a sublimable material and a cellulose-based or silicone-based binder and a non-tack varnish containing a cellulose-based or silicone-based binder that does not contain dye are applied to the non-transfer areas. A heat transfer sheet made by printing and coating a pattern on the paper.