JPH04239643A - Thermal transfer print processing method - Google Patents

Abstract

PURPOSE:To provide a thermal transfer print processing method capable of applying good simultaneous print processing imparting different transfer areas by a single press mold having both large and small press protruding parts by adjusting the transfer pressures of the large and small press protruding parts at the time of the pressing of the mold and capable of simplifying the working process of print processing work. CONSTITUTION:A hot stamping foil H is arranged between an elastic sheet S and a press mold 40 having a large press protruding part 20 relatively large in the area of its press surface 20a and having protruding width L1 and a small press protruding part 30 relatively small in its press surface 30a and having protruding width L2 and set to L1>L2 in the height relation between both large and small protruding parts 20, 30 and, thereafter, the press mold 40 is pressed to the elastic sheet S to apply print processing to the surface S of the elastic sheet S.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal transfer printing method using a thermal transfer foil.

0002

[Prior Art] A general method for thermal transfer printing on an elastic transfer base material is to place a heat transfer foil such as a hot stamp foil between the elastic transfer base material and a pressing mold.
This press mold is then pressed against the elastic transfer base material to print on the surface of the elastic transfer base material. Conventionally, the press molds used for this have a flat pressing surface. The thermal transfer printing process was performed by applying uniform pressure to the elastic transfer base material.

0003

[Problems to be Solved by the Invention] As mentioned above, the pressing mold used in the conventional thermal transfer printing processing method has a flat pressing surface. When printing with a thermal transfer foil interposed between the press plate and the press plate, the press plate has a large press convex portion having a large press surface with a relatively large transfer area and a press small convex portion having a small press surface area. When using a mold, if both parts are printed simultaneously with one mold, good printing cannot be achieved because the pressing forces per unit area of the large pressing convex portion and the small pressing convex portion are different. In other words, if the printing process is performed by matching the transfer conditions to the large pressure convex part so that the thermal transfer by the large pressure convex part with a large transfer area is good, the pressure will be excessive and the thermal transfer will occur at the small pressure convex part. On the other hand, if the printing process is performed by matching the transfer conditions to small pressure convex parts with a small transfer area, the pressure on the large pressure convex parts with a large pressure surface will decrease, resulting in chips that are not transferred to the transfer area. This caused defective thermal transfer, making it impossible to print uniformly and neatly.

For this reason, conventionally, when printing multiple locations with different transfer areas on an elastic transfer base material, a plurality of pressing dies having large pressing convex portions or small pressing convex portions are used to print different transfer areas. Depending on the conditions, the printing process was done in multiple parts. The present invention was made against the background of such conventional technology, and is capable of performing good simultaneous printing processing with different transfer areas using a single pressing mold having large pressing convex portions and small pressing convex portions. It is an object of the present invention to provide a thermal transfer print processing method that can also simplify the printing process.

[0005]

[Means for Solving the Problems] The present invention provides an elastic transfer base material and a pressing surface having a relatively large area and a protrusion width of L1.
A pressing mold having a large pressing convex part and a pressing surface having a relatively small area and a small pressing part with a protruding width of L2, and the height relationship between the large and small convex parts is L1 > L2. The present invention provides a thermal transfer printing method characterized in that a thermal transfer foil is placed between the two, and then this press mold is pressed against the transfer substrate to print on the surface of the transfer substrate. be.

[0006]

[Operation] The present invention has an elastic transfer base material, a large pressing convex portion whose pressing surface has a relatively large area and a protruding width of L1, and a pressing surface which has a relatively small area and whose protruding width is L2. It has a pressing small convex part, and the height relationship of both large and small convex parts is L1 > L2
A heat transfer foil is placed between the mold and the pressed mold. After that, when printing is performed on the surface of the elastic transfer base material by pressing this press mold against the transfer base material, the height relationship of both large and small convex parts is L1 > L2, so the mold press By adjusting the transfer pressure of both large and small convex parts at the time of printing, it is possible to perform simultaneous printing with different transfer areas using a single press mold having both large and small convex parts, which simplifies the printing process. It is also possible to achieve

[0007]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In describing this embodiment, a thermal transfer printing method for a shoe cover material for sports shoes will be taken as an example.

In the thermal transfer printing method according to the embodiment of the present invention, as shown in FIG. Large pressing convex portion 20 with area and protrusion width L1
and the pressing surface 30a has a small pressing convex portion 30 having a relatively small area and a protrusion width of L2, and both large and small convex portions 20,
Pressing die 40 with a height relationship of L1 > L2
A hot stamping foil (thermal transfer foil) H is placed between the two.

As the table 10, a commonly used base table used in thermal transfer printing processing can be adopted. The elastic sheet S is a base material layer S1 made of a fabric such as a woven fabric, non-woven fabric, or knitted fabric as shown in FIG. An intermediate layer S2 made of a foamed synthetic resin and having a foaming ratio of 10 to 500%, preferably 100 to 300%, and a surface layer S3 made of a soft vinyl chloride resin, polyurethane resin, acrylic resin, etc. are sequentially formed. General laminated synthetic leather or vinyl leather can be used, but it is not necessarily limited to this; for example, other elastic sheets such as rubber sheets can also be used, and even other materials such as hard inelastic sheets can be used. sheets, elastic or inelastic objects. Specific examples of this synthetic leather or vinyl leather include urethane synthetic leather Clarino (manufactured by Kuraray Co., Ltd.), Cordley (manufactured by Teijin Cordley Co., Ltd.), Cabron (manufactured by Achilles Co., Ltd.), and general foamed chlorinated leather. Examples include vinyl leather. Further, although the thickness of this elastic sheet S can be selected as appropriate, it is, for example, 0.5 to 5.0 mm, preferably 1 mm.
．． 0 to 3.0 mm, and if it is less than 0.5 mm, the elasticity of the elastic sheet will decrease and the effect of the present invention cannot be achieved significantly, while if it exceeds 5.0 mm, sufficient pressure will not be applied and it will not be uniform. cannot be transferred to

The pressing die 40 shown in FIG. 1 is a heating die for thermally transferring the vapor deposition foil H1 of the hot stamping foil H shown in FIG. 3 onto the surface S' of the elastic sheet S. The pressing surface 20a shown in FIG. 2 has a large pressing convex portion 20 with a relatively large area and a protruding width of L1, and the pressing surface 30a has a small pressing convex portion 30 with a relatively small area and a protruding width of L2. , and the height relationship between both the large and small convex portions 20, 30 is such that L1 > L2. The area ratio between the pressing surface 20a of the large pressing convex portion 20 and the pressing surface 30a of the small pressing convex portion 30 is 2:1 to 5,000:1, preferably 10:1 to 2,000:1. If it is less than 2:1, uniform transfer will be possible with L1 = L2, and there is no need to make the height relationship between the two large and small convex portions 20, 30 such that L1 > L2.On the other hand, if it exceeds 5,000:1, , L
Even if there is a difference between 1 and L2, uniform transfer will not be possible. Further, the height difference ΔL between the protruding width L1 of the large pressing convex portion 20 and the protruding width L2 of the small pressing convex portion 30 is 0.01 to
2.0 mm, preferably 0.1 to 1.0 mm, and 0
．． If it is less than 0.01 mm, the height difference ΔL has no effect; on the other hand, 2.
If it exceeds 0 mm, uniform transfer will not be possible.

As the hot stamping foil H, for example, a polyester base film H shown in FIG.
A vapor-deposited foil (metal-deposited foil and/or metal powder-containing ink) H1, in which a release coating layer H3, a color coating layer H4, an aluminum vapor-deposited layer H5, and an adhesive layer H6 are sequentially laminated on one side of 2, is used. However, it is not necessarily limited to this, but it can also be used, for example, in place of the aluminum vapor-deposited layer H5, a chromium vapor-deposited layer or a zinc vapor-deposited layer, metal powder foil (blocking foil), pigment foil, and even printed designs. You can also use printed thermal transfer paper. Thereafter, by pressing the pressing mold 40 shown in FIG. 1 against the elastic sheet S, a printing layer 50 is thermally transferred onto the surface S' of the elastic sheet S as shown in FIG. 4, thereby performing a printing process. At this time, the pressing load of the pressing die 40 shown in FIG. 1 is 0.1 to 10k.
g/cm2, preferably 0.5 to 5 kg/cm2; if it is less than 0.1 kg/cm2, uniform transfer will not be possible, while if it exceeds 10 kg/cm2, the pressing surface will sink into the elastic sheet S and uniform transfer will not be possible. It becomes impossible to do so.

[0011] Furthermore, the heating temperature of the press mold 40 is 80 to 80℃.
180°C, preferably 100-150°C, and 80°C
If it is less than 180° C., the temperature will be too low and the elastic sheet S and the hot stamping foil H will not come into close contact with each other. On the other hand, if it exceeds 180° C., the temperature will be too high and uniform transfer will not be possible. Furthermore, the pressing time with the pressing mold 40 is 0.5 to 10 seconds,
Preferably, the time is 1 to 5 seconds; if it is less than 0.5 seconds, the heat of the pressing mold will not be sufficiently transferred to the hot stamping foil H, while if it is more than 10 seconds, the transfer part will be crushed, making it impossible to obtain the desired transfer product. becomes. However, the transfer conditions of the thermal transfer printing method, such as the pressing force of the pressing mold 40, heating temperature, and pressing time, are appropriately selected depending on the elastic transfer substrate, the type and characteristics of the thermal transfer foil, the transfer area, and the like. In this way, the pressing surfaces 20a, 30a of both large and small convex portions 20, 30
Depending on the area ratio of
By adjusting the transfer pressure of both large and small convex parts 20 and 30 when pressing the mold by attaching L, it is possible to perform good simultaneous printing with different transfer areas using a single pressing mold 40 having both large and small convex parts 20 and 30. This eliminates the need to perform printing in multiple steps under different transfer conditions using a plurality of pressing molds 40 having large pressing convex portions 20 or small pressing convex portions 30, as in the past. Therefore, it is possible to simplify the printing process.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and even if the structure and operation are changed without changing the gist, it is included in the present invention. . For example, in the embodiment, a thermal transfer printing method for a shoe cover material for sports shoes is taken as an example, but for example, shoe cover materials for other shoes such as children's shoes and men's shoes, as well as hats, gloves, socks, clothes, etc. It can be used for thermal transfer printing processing of any transfer target substrate such as bags.

[0013]

Effects of the Invention The thermal transfer printing method of the present invention has the advantage that the elastic transfer substrate, the large pressing convex portion with a relatively large area of the pressing surface and the protrusion width L1, and the pressing surface are relatively large. A thermal transfer foil is placed between the press die and the press die, which has a small pressing convex portion with a small area and a protrusion width of L2, and the height relationship between the large and small convex portions is L1 > L2, and then By pressing this press mold against the transfer base material, printing is performed on the surface of the transfer base material, and the transfer pressure of both large and small convex parts is adjusted when the mold is pressed, so that both large and small convex parts are formed. Simultaneous printing with different transfer areas can be performed using a single press mold, and this has the effect of simplifying the printing process.

[0014]

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a printing process of a thermal transfer printing method according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of an elastic transfer substrate used in the thermal transfer printing method according to the embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a thermal transfer foil used in a thermal transfer printing method according to an embodiment of the present invention.

FIG. 4 shows an enlarged cross-sectional view of a transfer substrate printed by the thermal transfer printing method of the embodiment of the present invention.

[Explanation of symbols]

S; Elastic sheet (elastic transfer base material) S'; Surfaces L1, L2; Projection width H; Hot stamping foil (thermal transfer foil) 20; Large pressing convex portion 30; Small pressing convex portions 20a, 30a; Pressing surface 40; press mold

Claims (1)

[Claims] 1. An elastic transfer substrate, a large pressing convex portion with a relatively large pressing surface and a protruding width of L1, and a pressing surface with a relatively small area and a protruding width of L2. It has a small convex part, and the height relationship of both large and small convex parts is L1 > L2
Thermal transfer printing is characterized in that a thermal transfer foil is placed between the molded press mold and the press mold is then pressed onto the transfer base material to print on the surface of the transfer base material. Processing method.