JP3226644B2 - Transfer sheet made of vinyl chloride resin molding for exterior material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer sheet used for forming a transfer layer on an exterior material made of a vinyl chloride resin molded article.

[0002]

2. Description of the Related Art As an exterior material made of a vinyl chloride resin molded article having a design property, a pattern is directly printed on the surface of an extruded molded article of a vinyl chloride resin by a gravure, offset, or other printing method. There are ones formed by forming a transparent clear protective resin layer, and ones formed by extruding molding raw materials mixed with coloring pigments, pearl pigments, etc., and are used, for example, for window frames, handrails, doors, sashimi, etc. I have.

[0003]

In the case of the above-mentioned conventional exterior material made of a vinyl chloride resin molded product having a design property, the one in which a pattern is directly applied to the surface of the former extruded molded product by a gravure, offset or other printing method is as follows: The smoothness of the surface of the extruded body, which is the surface to be printed, is poor, it is difficult to register the pattern, and not only can a clear pattern not be expressed, but also a drying step is performed for each printing of one color printing layer. This necessitates a low efficiency in the case of multicolor printing, and increases the cost due to the necessity of a post-process for forming the transparent clear protective resin layer.

On the other hand, the latter, which is formed by extruding a molding material mixed with a color pigment or a pearl pigment, cannot easily form a pattern and tends to be monotonous.

In view of such circumstances, the present invention provides a transfer sheet that can easily impart high design characteristics to an exterior material made of a vinyl chloride resin molded article.

[0006]

The above object is achieved by a transfer sheet for an exterior material comprising a vinyl chloride resin molded article of the present invention having the following structure. That is, the transfer sheet for an exterior material formed of the vinyl chloride resin molded article of the present invention is a release layer of an acrylic resin sequentially formed on one surface of the transfer sheet substrate, and printing using the acrylic resin as a vehicle. A decorative layer comprising an adhesive layer and an adhesive layer, wherein the adhesive layer has a secondary transition temperature (T
g) 65-85 ° C, weight average molecular weight 15,000-250
It is formed of a vinyl chloride-vinyl acetate copolymer resin of No. 00.

[0007] In the transfer sheet for an exterior material comprising the vinyl chloride resin molded article of the present invention having the above structure, the transfer sheet base material has good releasability from a release layer formed of an acrylic resin. Things are used. Specifically, a biaxially stretched polyethylene terephthalate film having a thickness of 10 to 100 μm is preferably made of a polyester film made of polyethylene terephthalate, polyethylene terephthalate-isophthalate copolymer, polybutylene terephthalate, or the like. The surface of the transfer sheet substrate may be subjected to a release agent treatment as necessary.

The release layer formed on one surface of the transfer sheet substrate is the uppermost layer of the transfer layer transferred to the vinyl chloride resin molded article as the transfer object. Acrylic resins having excellent weather resistance, such as polymethyl methacrylate, polyethyl methacrylate,
It is formed of a resin such as polyethyl acrylate and polybutyl acrylate. It should be noted that a fluorine-based resin such as polyvinylidene fluoride can be added to the acrylic resin.

When the function of protecting the surface of the transfer layer transferred to the exterior material made of the molded article of vinyl chloride resin, which is to be transferred, is fulfilled only by the above-mentioned release layer, the release layer is weighed 1 g (dry). ) / M ² or more.

An ultraviolet absorber for preventing deterioration due to ultraviolet rays is added to the release layer as needed. Specifically, 2
-(2'-hydroxy-3 ', 5'-di-tert-butylphenyl) -5-chlorobenzotriazole, 2-
(2′-hydroxy-3′-tert-butyl-5′-
Methylphenyl) -5-chlorobenzotriazole, 2
-(2'-hydroxy-3'-tert-amyl-5 '
-Isobutylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-isobutyl-5 '
-Methylphenyl) -5-chlorobenzotriazole,
2'-hydroxyphenyl-5-chlorobenzotriazole-based ultraviolet absorbers such as 2- (2'-hydroxy-3'-isobutyl-5'-propylphenyl) -5-chlorobenzotriazole, 2- (2'- Hydroxy-
2′-hydroxyphenylbenzotriazole-based ultraviolet absorbers such as 3 ′, 5′-di-tert-butylphenyl) benzotriazole and 2- (2′-hydroxy-5′-methylphenyl) benzotriazole; '-
Dihydroxy-4-methoxybenzophenone, 2,2 '
2,2′-dihydroxybenzophenone-based ultraviolet absorbers such as dihydroxy-4,4′-dimethoxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2, 2-hydroxybenzophenone UV absorbers such as 4-dihydroxybenzophenone, salicylate UV absorbers such as phenyl salicylate,
Further, inorganic UV absorbers such as ZnO having a particle size of 1 μm or less are used.

The decorative layer is composed of a printed layer using an acrylic resin having excellent weather resistance as a vehicle.
In the printing ink for forming the printing layer, there is a method of improving the printability or giving the printing layer flexibility to prevent the printing layer from cracking during transfer or use. A vinyl-vinyl acetate copolymer can also be added. The colorant in the printing ink used to form the decorative layer may be a colorant used in ordinary gravure inks. For example, red color, titanium dioxide, vermilion, ultramarine,
By using inorganic pigments such as patina (basic copper carbonate) and carbon, and organic pigments such as quinacridone, azo type, cyanine and isoindolinone, etc., it can be used for decorative layers having excellent properties in terms of weather resistance. Become.

The adhesive layer is formed of a vinyl chloride-vinyl acetate copolymer resin in order to provide the transfer layer with heat resistance and water resistance.

As the vinyl chloride-vinyl acetate copolymer resin for forming the adhesive layer, a resin having a secondary transition temperature (Tg) of less than 65 ° C. or having a weight average molecular weight of 15,000 is used. When the one having a secondary transition temperature (Tg) of more than 85 ° C. or the one having a weight average molecular weight of more than 25,000 is used, a vinyl chloride resin is used. The initial adhesion between the outer layer material formed of the extruded product and the transfer layer becomes poor.

[0014] In the transfer sheet of the present invention, between the release layer made of an acrylic resin formed on one surface of the base material for the transfer sheet and the decorative layer consisting of a printing layer using the acrylic resin as a vehicle. By providing a transparent clear protective resin layer, the transfer layer may be provided with better abrasion resistance and the like.

In order to make the transparent clear protective resin layer to have a small amount of coating and high physical properties, it is preferable to form the transparent clear protective resin layer with a curable resin such as a thermosetting resin or an ionizing radiation curable resin. In addition, it is preferable to use two-component reaction-curable polyurethane, unsaturated polyester, epoxy resin, or the like.

The coating amount of the transparent clear protective resin layer is adjusted depending on the physical properties required for the transfer layer. For example, in order to maintain a level at which the handle cannot be removed with a Taber wear CS-17 wear wheel of 500 g load and 200 rotations, 2
It has been confirmed that a coating amount of g / m ² is necessary.

The decorative layer may be protected by adding an ultraviolet absorber as necessary to the transparent clear protective resin layer.

[0018]

According to the transfer sheet of the present invention, by utilizing a general transfer technique, the initial adhesion to the exterior material made of a vinyl chloride resin molded article is good, and
A transfer layer having high robustness in terms of heat resistance and water resistance can be formed, and a clear pattern can be easily and accurately formed.

[0019]

EXAMPLES The specific structure of a transfer sheet for an exterior material comprising the vinyl chloride resin molded article of the present invention will be described below with reference to examples.

Example 1 In FIG. 1, an acrylic resin for a release layer was formed on one surface of a transfer sheet substrate 2 made of a 25 μm thick polyethylene terephthalate film “Toray Co., Ltd .: x-45”. The release layer 3 was obtained by overprinting "Showa Ink Industry Co., Ltd .: Haklinis 46-7" three times with a gravure solid plate made by machine engraving (number of lines: 48 lines / cm, angle setting: 0 degree). Was formed.

Subsequently, a gravure ink using an acrylic resin as a vehicle, a pattern printing layer M using "Showa Ink Industries Co., Ltd .: GG Ink", and a gravure ink, also using an acrylic resin as a vehicle, "Showa Ink Co., Ltd." Industrial place: BC72 ink "and a solid printing layer 4 to form a decorative layer.

Thereafter, a vinyl chloride-vinyl acetate copolymer resin (Tg: 72 ° C., weight average molecular weight 21,000)
Heat sealant "The Inktec Co., Ltd .: FH
S-No. 1) a gravure solid plate made by machine engraving (number of lines:
The coating was performed at 40 lines / cm at an angle of 0 ° to form the adhesive layer 5, thereby obtaining a transfer sheet 1 according to one embodiment of the present invention.

In the transfer sheet 1, the release layer 3
The pattern printing layer M, the solid printing layer 4, and the adhesive layer 5 are the transfer layer 6.

[Experiment 1] The adhesive layer 5 of the transfer sheet 1 was brought into contact with the surface of a cage, which is an exterior material made of an extruded body of a vinyl chloride resin, and the transfer layer of the transfer sheet 1 was heated and pressed. As a result of transfer of No. 6, a high design property was imparted to the exterior material formed of the vinyl chloride resin molded article.

Example 2 In FIG. 2, an acrylic resin for a release layer was formed on one surface of a transfer sheet substrate 12 made of a 25 μm thick polyethylene terephthalate film “Toray Co., Ltd .: x-45”. "Showa Ink Industry Co., Ltd .: Haklinis 46-7" was applied with a gravure solid plate made by machine engraving (line number: 48 lines / cm, angle setting: 0 degree) to form a release layer 13.

Subsequently, a two-part curable acrylic resin "Co., Ltd."
Showa Ink Kogyosho: Anti-Sol Anchor ”was replaced with a gravure solid plate made by machine engraving (number of lines: 54 lines / cm, angle setting: 0).
) To form a transparent clear protective resin layer 14.

Next, a gravure ink using an acrylic resin as a vehicle, a pattern printing layer m using "Showa Ink Industries, Ltd .: GG Ink" and a gravure ink using an acrylic resin as a vehicle, "Showa Ink Industries, Ltd." Location: BC72 ink "and a solid printing layer 15 to form a decorative layer.

Thereafter, a vinyl chloride-vinyl acetate copolymer resin (Tg: 72 ° C., weight average molecular weight 21,000)
Heat sealant "The Inktec Co., Ltd .: FH
S-No. 1) a gravure solid plate made by machine engraving (number of lines:
(40 lines / cm, angle setting: 0 degree), and the adhesive layer 16 was formed to obtain a transfer sheet 11 which is another example product of the present invention.

In the transfer sheet 11, the release layer 13, the transparent clear protective resin layer 14, the picture printing layer m, the solid printing layer 15, and the adhesive layer 16 are the transfer layer 17.

[Experiment 2] The adhesive layer 16 of the transfer sheet 11 was brought into contact with the surface of an exterior material formed of an extruded body of a vinyl chloride resin.
When the transfer layer 17 of the transfer sheet 11 was transferred by heat and pressure, a high design property was imparted to the exterior material formed of the vinyl chloride resin molded article.

[0031]

According to the transfer sheet of the present invention, a decorative layer having excellent initial adhesion to a vinyl chloride resin molded article and excellent heat and water resistance properties by a transfer step using a normal transfer sheet. An exterior material made of a vinyl chloride resin molded article subjected to the above is obtained.

Further, according to the transfer sheet of the present invention, similarly, a clear pattern having high robustness can be accurately expressed on an exterior material formed of an extruded body of a vinyl chloride resin having poor surface smoothness. Therefore, it has an excellent effect in practicality.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a transfer sheet according to one embodiment of the present invention.

FIG. 2 is a model cross-sectional view of another embodiment of the transfer sheet of the present invention.

[Explanation of symbols]

 1 ··· Transfer sheet composed of transfer sheet base material and transfer layer 2 ··· Transfer sheet base material 3 ··· Release layer M ··· Picture print layer in decorative layer 4 ···・ Solid printing layer in decoration layer 5 ・ ・ ・ ・ Adhesive layer 6 ・ ・ ・ ・ Transfer layer

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B32B 1/00-35/00 B44C 1/16-1/175 B41M 3/00-3/18

Claims (1)

(57) [Claims] 1. A transfer sheet substrate comprising: a release layer of an acrylic resin sequentially formed on one surface of a transfer sheet substrate; a decorative layer of a print layer using an acrylic resin as a vehicle; and an adhesive layer. And the adhesive layer has a secondary transition temperature (Tg) of 65 to 85 ° C. and a weight average molecular weight of 15,000.
A transfer sheet for an exterior material, comprising a vinyl chloride resin molded article, which is formed of a vinyl chloride-vinyl acetate copolymer resin.