JPH0453795A - Method for manufacturing transfer sheets and painted molded products - Google Patents

Abstract

PURPOSE:To obtain a transfer sheet capable of imparting a design having gloss and rich in a three-dimensional feeling, especially, a design large in one unit of an uneven pattern by successively providing a release layer, a gloss layer, a partial printing layer of heating foamable ink and an adhesive layer on transfer pasteboard. CONSTITUTION:A release layer 2, a gloss layer 3, a partial printing layer 4A of heating foamable ink and an adhesive layer 5 are successively provided on transfer pasteboard l. The gloss layer can be formed by the vapor deposition of a metal or the solid printing of ink containing bright pigment. The heating foamable ink used in the printing of a partial printing layer is prepared by adding an appropriate foaming agent to usual ink using an ethylene/vinyl acetate copolymer, polyamide, polyvinyl chloride, polyurethane, an acrylic resin, styrene rubber, nitrile rubber, polyvinyl butyral or polyethylene as vehicle. A pattern printing layer 6 may be provided between the release layer 2 and the glossy layer 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transfer sheet 1 to a method for manufacturing a molded product using the same.

(Conventional technology 1) Transfer sheets are preferably used for painting plastic molded products such as home appliances. Many have a glossy layer created by metal vapor deposition. However, designs created using conventional transfer sheets are monotonous because the glossy layer is flat.

Therefore, as a countermeasure for painting with a varying design, there is a method of making the glossy layer appear uneven by printing, and a method of giving unevenness to the surface of the transfer mount to make the transfer. The method of covering the surface with unevenness, or the setting of a hardened transparent ink layer on top or bottom of the glossy layer (
) and embed it in a glossy layer using pressure during transfer to give a three-dimensional effect.

The first method has a slightly more three-dimensional effect than the one without printing, but it is far from meeting the demand.

With the second method, the surface becomes matte A7, and the purpose of providing a glossy layer is diminished. The third method can provide a beautiful appearance, but depending on the uneven pattern, the three-dimensional effect may be insufficient. This is because, in this manual processing, one unit of the pattern can only provide human-sized unevenness on the glossy layer.

[Problems to be Solved by the Invention] An object of the present invention is to provide a transfer sheet capable of giving a glossy and three-dimensional design, especially a design in which each unit of the uneven pattern is large, and to The purpose of the illustrations used is to provide a method for manufacturing molded products.

[Means for Solving the Problems] The transfer sheet of the present invention basically has a release agent layer (2), a gloss layer (3) on a transfer mount (1), as shown in FIG.
), a partial printing layer (4A) of heat-foamable ink, and an adhesive layer (5) are provided in this order.

Transfer mounts include films made of polyester, polypropylene, polystyrene, cellophane, and other transfer sheets.
It is best to use what is commonly used as a mount for ~.

The release agent layer can be formed using any known release agent, such as a modified phenol resin, acrylic resin, xy resin, nitrocellulose, rosin, or wax. good.

The glossy layer can be formed by metal vapor deposition or solid printing with an ink containing a glittering pigment. The metals used for vapor deposition are 1, 6. +1. Commonly used materials such as Cr and Cu may be used. Examples of bright pigments are as follows. (a) Pearl pigments, specifically the inner parts of shells, crushed pearls, mica, and fine particles of mica have T! 02 or baked with iron oxide,
(b) Metal powder, specifically fine particles of copper, aluminum, brass, bronze, gold, silver, etc., preferably 1 to 120μ in size; (c) Pieces of vapor-deposited plastic film, such as boliethylene terephthalate triilium. Metals like nihen, usually aluminum, are vapor-deposited and crushed (silver powder), and metals that are vapor-deposited and then coated with transparent yellow paint are crushed (golden powder).

The heat-foamable ink used for printing the partial printing layer is a conventional ink using ethylene-vinyl acetate copolymer, polyamide, polyvinyl chloride, polyurethane, acrylic resin, styrene rubber, nitrile rubber, polyvinyl butyral, polyethylene, etc. as a vehicle. A suitable foaming agent is added to printing ink. The foaming agent to be added is
Chemical blowing agents that generate gases such as nitrogen and carbon dioxide when heated, such as azobiscyclohexanilyl,
In addition to known azodicarbonamide, dinitropentamebrenetetramine, p-toluenesulfuryl hydrazide, azobisisobutyronitrile, and sodium bicarbonate, there are also microcapsules that enclose gas such as air, and the present invention also uses these. Select and use at will. The expansion ratio of the ink is preferably in the range of 1.5 to 5.0.

In addition, a foaming accelerator, an anti-oxidizing agent, a thickening agent, and the like are added to the ink as necessary.

The thickness of this printing layer depends on the expansion ratio of the ink and the pattern to be printed, but is generally in the range of 3 to 50 .mu.m. Printing may be performed by known means such as gravure method or screen method.

An appropriate adhesive is selected depending on the material of the base H to be transferred. For example, acrylic resin, vinyl chloride vinegar copolymer,
The vehicle is polyolefin, rubber resin, or styrene resin.

The means for applying the adhesive is the same as the conventional one.

As shown in FIG. 2, the transfer sheet of the present invention may have a pattern printing layer (6) in a stepped structure between the release agent layer (2) and the glossy layer (3). This pattern may be printed by known means using transparent or opaque ordinary printing ink. It is also possible to add color to the glossy layer by installing a transparent colored solid printing layer, and in the present invention, the term "picture printing layer" includes such a layer.

As shown in Figure 2, a protective layer (7) made of acrylic resin, di-cellulose, urethane resin, etc. may be provided on top of the release agent layer (2). It is similar to the transfer sheet.

The method of manufacturing a molded article according to the present invention using the above-mentioned transfer sheet is shown in FIG. Overlay any of the above transfer sheets 1 to 1 on the molded product J(8),
Roll press machine or flat plate press machine (9△.

9B> etc., the partial printing layer (4A) is foamed to give unevenness to the glossy layer (3),
It consists of peeling off the transfer mount (1). In this way, a molded article 1Q, shown in FIG. 4, having a three-dimensional appearance due to the hollow, foamed partial printing layer (4B) is produced.

The thermopressure transfer may be performed simultaneously with the molding of the base material by using a press machine or by placing the transfer sheets 1 to 1 in a mold for molding the base material.

[Function] In the transfer sheet of the present invention, the partial printed layer of the heat-foamable ink foams due to the heat during transfer and pushes up the glossy layer, thereby realizing a three-dimensional design.

The method of the present invention utilizes this to produce a molded article with a three-dimensional and glossy design.

[Example] Polyethylene terephthalate film with a thickness of 25 μm
Lumirror" (manufactured by Toshi) was used as a transfer mount, and one side thereof was gravure coated with an acrylic resin release agent "Hakuri 45" (manufactured by Showa Ink Kogyosho) to a thickness of 1 μm.

On top of that, a colorless and transparent acrylic resin paint [so-resistant, I
ACJ (same) for l is gravure coated to a thickness of 1μ.
A protective layer of m was provided. On top of the protective layer, a granite-like pattern resembling pyrotechnic rock was gravure printed using acrylic resin printing ink rGGJ (same).

On the printed surface of the sheets 1 to 1 above, a glossy layer with a thickness of 500 mm is provided by vapor-depositing aluminum, and heat-foamable ink rPTF is applied.
-NQ3J (same), rejection of a pattern similar to the picture 1
A partial printing layer of 0 μm was installed using the gravure method. 1 loaf of acrylic resin adhesive RL-13320J (same)
The transfer sheet of the present invention was obtained by gravure printing so as to have a particle diameter of 0 μyn.

This transfer sheet was layered on an acrylic resin-like base material, and the roll press method (roll temperature: 200'C1 feeding speed: 4
771. A molded article with a pattern was obtained by heat-pressure transfer at a pressure of 1 ONg/min and a pressure of 1 ONg/cm.

(Effects of the invention) According to the transfer sheet and method of the invention, it is glossy and
Furthermore, it is possible to produce designs with a rich three-dimensional effect.

The transfer sheets 1 to 1 of the present invention can provide a design with a personal uneven pattern, and realize a molded product having, for example, a granite-like appearance.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view for explaining the basic aspects of the transfer sheets 1 to 1 of the present invention. FIG. 2 is a diagram similar to FIG. 1 for explaining another aspect of the transfer sheet of the present invention. FIG. 3 is a diagram for explaining an example of the manufacturing method of the present invention. , a diagram similar to FIG. 1. FIG. 4 is a schematic cross-sectional view of a molded product made by the method of the present invention. 1... Transfer mount 2... Release agent layer 3.
...Glossy layer 4A...Partial printing layer (before foaming) 4B...Partial printing layer (foaming (fresh)) 5...Adhesive layer 6...Picture printing layer 7
...Protective layer 8...Base material 9A, 9
B...Plate press machine patent applicant Dai Nippon Printing Co., Ltd. Agent Patent attorney Souo Suga 1st 2nd figure

Claims (5)

[Claims] (1) A transfer sheet comprising a release agent layer, a glossy layer, a partial printing layer of heat-foamable ink, and an adhesive layer provided in this order on a transfer mount. (2) The transfer sheet according to claim 1, wherein a pattern printing layer is provided between the release agent layer and the glossy layer. (3) Claim 1 or 2, wherein a protective layer is provided on the release agent layer.
transfer sheet. (4) Layering the transfer sheet according to any one of claims 1 to 3 on the molded base material and applying heat and pressure to transfer the sheet, and
A method for producing a decorated molded article, which comprises foaming a partial printing layer of heat-foamable ink to make a glossy layer uneven, and then peeling off a transfer mount. (5) The manufacturing method according to claim 4, wherein the transfer sheet according to any one of claims 1 to 3 is placed in a molding die, and the heat-pressure transfer is carried out at the same time as molding the base material.