JPH01188399A - Transfer paper and production thereof - Google Patents

Abstract

PURPOSE:To enable a reduction in equipment cost and enable multi-kind small- scale production, by transferring a rugged pattern on a sheet to the surface of a releasable layer of a release paper comprising a base and the releassable layer provided thereon. CONSTITUTION:A thermoplastic resin having a release property is extruded by a T-die extrusion laminating machine 1. As a base 4, a wood free paper is used which is preliminarily subjected to a corona discharge treatment on the side thereof for contact with the resin 5. A sheet 6 provided with a predetermined rugged pattern by embossing is placed so that the embossed side thereof is brought into contact with the resin 5. The base 4 and the sheet 6 are laminated with each other, with the resin 5 sandwiched therebetween, by a pressing roller 2. After cooling by a cooling roller 3, the resultant laminate 7 is taken up by a take-up machine 8. The sheet 6 is released from the resin surface of the laminate 7 thus taken up, whereby a transfer paper with the rugged pattern transferred accurately on the resin surface is obtained.

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a novel transfer paper for imparting a three-dimensional pattern and a method for producing the same, and more specifically, to a novel transfer paper for imparting a three-dimensional pattern, and more specifically to a transfer paper that can be inexpensively and easily provided with high gloss and directionality. The present invention relates to a transfer paper that can be provided with a three-dimensional pattern or a perspective pattern, and a method for manufacturing the same.

"Prior Art and Problems" Embossing has been widely used for a long time as a method of adding three-dimensional patterns to paper, flooring materials made of plastic sheets, synthetic leather, etc. Embossing is generally performed by preheating a sheet-like material, applying a concavo-convex pattern using a molded roll engraved with a predetermined pattern, cooling it, and winding it up.

However, with conventional embossing, it is necessary to prepare embossed rolls with the desired number of uneven patterns engraved on them, which not only increases equipment costs but also requires storage of heavy rolls. ■It is necessary to replace the imprinting roll every time the uneven pattern changes, which inevitably disadvantages work efficiency, which is especially fatal in the case of high-mix, low-volume production. It is fraught with problems such as becoming.

"Means for Solving the Problems" In view of the above circumstances, the present invention has been developed as a result of intensive research to solve the above problems.The present invention is based on the results of intensive research to solve the above problems. The inventors have discovered that the intended purpose can be achieved by indirectly transferring the image by using a photoreceptor, and have thus arrived at the present invention.

That is, the first aspect of the present invention is to create a three-dimensional pattern by transferring the uneven pattern of a sheet having an uneven pattern onto the release layer surface of a release paper consisting of a base material and a release layer provided on the surface thereof. A second aspect of the present invention provides a transfer paper for applying a thermoplastic resin by extruding a thermoplastic resin having mold releasability between a base material and a sheet having an uneven pattern. Each of these describes a method for manufacturing transfer paper, which is characterized by transferring the image onto the surface and then cooling it.

In the present invention, the term "transfer paper" also includes cases where a material other than paper is used as a base material.

In the present invention, the sheet on which the uneven pattern is applied is as follows:
Any synthetic resin that has enough heat resistance to withstand the temperature during embossing which imparts the uneven pattern onto the sheet using a molded roll, and the temperature during which the embossed uneven pattern is transferred to the release paper. There are no particular restrictions; for example, PB
Examples include sheets (or films) of polyesters such as T and PET, polyvinyl chloride, polyamide, polycarbonate, polyacetal, and polypropylene, and composites made by bonding these with bunker materials.

The base material used for the release paper of the present invention is the temperature at which the uneven pattern transferred to the release paper is transferred to a sheet such as a plastic sheet to which a three-dimensional pattern is to be imparted (hereinafter referred to as a three-dimensional pattern imparted sheet). There are no particular restrictions on materials as long as they have heat resistance that can withstand high temperatures, such as paper, cloth, PBT
%PET and other polyesters, polyamides, polycarbonates, polyacetals, polypropylene and other synthetic resin sheets (films), metal foils, metal foils and synthetic resin sheets (
Examples include lamination with a film). For example, when paper is used as the base material, the conventional embossing method usually uses a density in the range of 110 to 150 g/cd, but in the case of the present invention, about 40 to 60 g/rd is sufficient.

The release layer used in the present invention may be one that can withstand the temperature during transfer to a three-dimensional pattern-imparting sheet such as a plastic sheet, such as poly-4-methylpentene-1.
(TPX), thermoplastic resins having mold releasability such as polypropylene, ethylene-propylene copolymers, silicone resins, etc., and mixtures of these with additives for imparting mold releasability are preferably used. The thickness of the mold release layer is not particularly limited, but it does not need to be 25 μm or more thick as in the conventional embossing method. Although it is possible to use other methods, extrusion method is particularly suitable from the viewpoint of productivity and work efficiency.

In the present invention, the uneven pattern may be a pattern, a design, a character, a character, a symbol, etc., and there is no particular restriction on the pattern, and the method for forming the uneven pattern on the sheet may be any conventionally known method.

The uneven pattern of the sheet may be transferred to the release paper using a known method, such as appropriately preheating the release layer surface of the release paper and passing it between pressure rolls, or pressing with a pressure press. However, by using the extrusion method, the two steps of laminating the base material and the release layer, that is, manufacturing the release paper, and transferring the uneven pattern to the release layer, can be accomplished at once, which is extremely effective. It is advantageous.

When using an extrusion method, the most suitable is the so-called Santoifuti laminating method, in which a base material is fed from one side, a sheet having an uneven pattern is fed from the other, and a thermoplastic resin having mold releasability is extruded between the two. Of course, a method may also be suitably employed in which a thermoplastic resin having mold releasability is first extruded onto a base material to form a molten resin layer, and then the sheets are laminated to transfer the uneven pattern to the molten resin layer. In either case, by peeling and separating the linear sheet after cooling, it is possible to obtain a transfer paper in which the uneven pattern of the sheet is transferred to the surface of the release layer.

Various methods can be employed to impart a three-dimensional pattern using the transfer paper thus obtained.

For example, after a three-dimensional pattern-imparted sheet is heated with a preheating roll or an infrared heater, it is fed together with the transfer paper of the present invention in a pressure press or between pressure rolls, and the uneven pattern of the transfer paper is applied to the surface of the three-dimensional pattern-imparted sheet. After pressure transfer, the transfer paper is cooled and peeled and separated to obtain a sheet with an uneven pattern. In addition, in the case of resin, the resin layer is laminated on transfer paper by a coating method or extrusion method, and then cooled for 5 times, and in the case of ink (including resin) or metal vapor deposited layer, heating and pressure are applied from the back side. After that, a method of cooling and peeling off the transfer paper can be used. When the transfer paper of the present invention is applied to the metal vapor deposited layer, it has a matte gloss and color tone, and therefore the uneven pattern has a blurred appearance, giving it a heavy and elegant appearance.
Suitable for folding screens, sliding doors, wallpaper, ceilings, picture frames, tea utensils, Buddhist utensils, marking tapes, tack labels, etc. on the other hand,
When metal vapor deposition is applied directly to the transfer paper of the present invention, it is possible to create a more glossy and clear uneven pattern than in the case described above, and in addition to the above-mentioned uses, it can also be used as a light-reflecting sticker, etc. can provide materials suitable for Furthermore, when the metal vapor deposited on the uneven surface is transferred to a three-dimensional pattern imparted sheet using a transfer paper, the metal vapor deposited layer and the three-dimensional pattern imparted sheet are integrated, resulting in a product with good crack resistance due to tension. is obtained.

The three-dimensional pattern-imparting sheet is not particularly limited, and examples thereof include resin (including foam) sheets (films), metal vapor deposited layers, and the like.

The method for imparting a three-dimensional pattern using transfer paper of the present invention can also be used in combination with conventional embossing itself, and in this case, the present invention can create a micro and delicate three-dimensional effect due to the difference in gloss and the glossiness rich in directionality. It is possible to create a unique shape that has both a sense of perspective and a macro and dynamic three-dimensional effect due to the unevenness of embossing, and a sense of perspective, and - it is possible to provide an uneven pattern with a rich variety of layers.

"Example" The present invention will be described below with reference to Examples, but the present invention is not limited thereto in any way.

Example 1 Using the apparatus shown in Fig. 1, polypropylene (rLA221 manufactured by Mitsui Petrochemical Co., Ltd.
J) using a T-die extrusion laminating machine (l) (diameter 115
Tsuru (L/D25) was used for extrusion under the conditions of a T-die outlet resin temperature of 290° C. and a screw rotation speed of 13 Orpm. Base material (4
) using high-quality paper (52.3 g/n?), the surface in contact with the resin (dissolved film) (5) was previously subjected to corona discharge treatment (30 W/i/win), and on the other hand, a predetermined unevenness was applied. A sheet (6) having a concavo-convex pattern arranged so that the surface embossed with the pattern is in contact with the resin (5) is
sandwiched in the center (commonly called polysand)
and press it with a press roll (2) (pressure: 35k).
g/-), processing speed 150 m/win, resin thickness 2
Lamination was performed with a processing width of 0 μm and a processing width of 1600 m, and after cooling with a cooling roll (3), the laminate (sheet with an uneven pattern/resin/base material) (η) was wound up as one piece with a winder (8).

The rolled laminate (from the resin surface of η to the above sea) (
6) was peeled off to obtain a transfer paper in which the intended uneven pattern was accurately copied onto the resin surface.

When this transfer paper was coated with urethane resin and peeled off after cooling, a urethane resin sheet with a delicate three-dimensional pattern was obtained.

When the obtained urethane resin sheet with a three-dimensional pattern was subjected to metal vapor deposition, a sheet suitable for marking tapes, tack labels, etc. was obtained.

Example 2 When metal vapor deposition was applied directly onto the uneven surface of the transfer paper having the uneven pattern obtained in Example 1, a metal-like marking tape with gloss difference and directionality suitable for tack labels, etc. was obtained. A sheet was obtained. Example 3 A urethane resin is coated on the transfer paper with metal vapor deposition on the uneven surface of Example 2, and when peeled off after cooling, a gold-It tone urethane sheet with a subtle three-dimensional pattern with different gloss and directionality is produced. was gotten. In addition, this metal-like urethane sheet has a metal vapor-deposited layer and a urethane resin layer integrated, and has improved tensile resistance compared to conventional metal-deposited layers that are thermally transferred to the surface of the urethane sheet via a heat-sensitive adhesive. It had good crack resistance.

Example 4 The heat-sensitive adhesive side was coated on the transfer paper in which metal vapor deposition was applied on the uneven surface of Example 2, and the metal vapor deposited layer was thermally transferred to an ABS resin plate with a thickness of 2 cm. A metal-like ABS resin plate with a complex three-dimensional pattern with different gloss and directionality, which cannot be obtained by metal vapor deposition transfer, was obtained.

"Operation/Effect" As mentioned above, the present invention does not directly transfer the uneven pattern by embossing, but indirectly transfers the uneven pattern of the sheet by using a sheet having an uneven pattern obtained by embossing etc. It is characterized by transferring images, and has many advantages as described below.

■Since you only need to prepare a sheet with an uneven pattern instead of the conventional embossed roll, there is no need to stock a large number of heavy embossing rolls, and equipment costs can be significantly reduced. By combining it with embossing, a unique pattern is created that combines the micro and delicate three-dimensional effect and perspective created by the indirect transfer of the present invention, and the macro and dynamic three-dimensional effect and perspective created by the direct transfer of embossing. - The uneven pattern can be changed by simply replacing the sheet with the uneven pattern, so it is particularly suitable for high-mix, low-volume production. - Compared to the conventional embossing method, the base material and release layer are thinner. Because it is good, material costs are drastically reduced and it is economically advantageous. - Folding screens and sliding doors are made by joining multiple sheets of metal foil, which requires a high level of skill and is extremely low in productivity. By using the transfer paper of the present invention, it is possible to easily produce a large quantity of metal-bonded sheets with the same appearance as conventional metal foils, making it possible to produce inexpensive folding screens without requiring a high degree of skill. and fusuma can be provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of the apparatus used in Example 1. 1... Extrusion laminating machine 2... Press roll 3... Cooling roll 4... Base material 5... Resin (molten film) 6... Sheet with uneven pattern 7... Laminate (uneven pattern) Sheet with pattern/resin/base material) 8... Winder

Claims (1)

[Claims] 1. A three-dimensional pattern is provided by transferring the uneven pattern of a sheet having an uneven pattern onto the release layer surface of a release paper consisting of a base material and a release layer provided on the surface thereof. Transfer paper for. 2. A thermoplastic resin having releasability is extruded between a base material and a sheet having an uneven pattern, and the uneven pattern of the sheet is transferred to the surface of the thermoplastic resin, and then cooled. Method of manufacturing transfer paper.