JP2522154Y2 - Decorative plastic plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a decorative plastic plate used for panel materials such as indoor walls and ceilings or interior decoration.

(Prior Art) As a decorative plastic plate, a decorative plastic plate having a printed layer formed directly on the surface of a transparent plastic plate by silk screen printing is used. In addition, although a technique of laminating a film printed on one side of a transparent resin film on a plastic plate with an adhesive is also known, it is insufficient for applications requiring semi-permanent durability such as panel materials. Met. That is, there is a disadvantage that the bonded portion is peeled off due to a change in environmental temperature or humidity over a long period of time.

(Problem to be Solved by the Invention) The present invention provides a decorative plastic plate having a high decorative value by transferring a precise print image obtained by a gravure printing method or the like. Another object of the present invention is to obtain such a decorative plastic plate economically.

(Means for Solving the Problems) The present invention will be described with reference to the drawings. The decorative plastic plate of the present invention includes a light-transmitting plastic plate (11), a primer layer (12), a transfer printing layer (13), and a cured resin. Layers (1
4) are sequentially formed.

The plastic plate (11) requires that the transfer printing layer (13) can be seen through the plastic plate. The thickness of the plastic plate (11) is not particularly limited.
Those having a thickness of mm are preferably used.

The material of the plastic plate (11) may be a material having light transmittance, such as polymethyl methacrylate, polycarbonate, polyethylene terephthalate, or the like.
Nylon, epoxy, polymethylpentene, and the like.

The primer layer (12) is a 1-100 μm paint resin layer formed on the surface of the plastic plate (11) so that the transfer printing layer (13) is firmly adhered to the plastic plate (11). The layer is a light-transmitting thermosetting polyurethane resin obtained by reacting and curing a composition containing a polyisocyanate and a polyol, which is applied on a plastic plate (11). In particular, a non-yellowing polyurethane coating using hexamethylene diisocyanate or the like as a polyisocyanate is preferable because it does not yellow when exposed to light for a long period of time. For applications used for outdoor walls and the like, a polyurethane resin containing a resin fluororesin-based polyol having excellent resistance is preferable.

The primer layer (12) also needs to be light-transmitting so that the transfer printing layer (13) can be seen through, and a clear paint is used for that purpose.

The transfer printing layer (13) is obtained by transferring a printed image on which an arbitrary pattern or the like is formed to the surface of the primer layer (12). For the transfer printing layer (13), a transfer sheet pre-printed on a base material such as a polyester film by a gravure printing method is used.
2) It can be formed by thermocompression bonding to the surface.

The cured resin layer (14) is formed to reinforce the transfer printing layer (13) and to improve the resistance as a decorative plastic plate. In particular, in order to sharpen the image of transfer printing, it is preferable to form the coating with a concealable paint using a pigment such as titanium white or carbon black. As the resin for the cured resin layer (14), the polyurethane paint used for the primer layer (12) may be used. However, any other curable paint that cures at room temperature or low temperature may be used. It can also be used. The thickness of the cured resin layer (14) is not particularly limited, but is preferably 5 μm or more.

The hard coat layer (15) is formed in order to prevent the surface of the plastic plate from being easily damaged and to provide a coating film having excellent scratch resistance. Hard coat layer (15)
Of course, a clear paint is used so that the transfer printing layer (13) can be seen through. The paint for forming the hard coat layer (15) is not limited as long as it provides a coating film having excellent scratch resistance after curing. Specifically, an organoalkoxysilane using a thermosetting silicone resin or an acrylic coating using an ultraviolet-curable epoxy, urethane, or polyester resin is used.

Example An example will be described below. In the examples, “%” represents “% by weight”.

Example 1 An ultraviolet-curable urethane-based acrylic paint was prepared according to the following formulation.

Urethane acrylate (Orester RA-1353 manufactured by Mitsui Toatsu Chemical Co., Ltd.) 30.0% 2,2'-dimethoxy-2-phenyldisetophenone 0.5 ethyl acetate 30.0 toluene 15.0 isopropyl alcohol 15.0 cellosolve acetate 9.5 5 mm thick polycarbonate plate The coating material prepared above is uniformly applied to one side with a spray gun, the solvent is removed with a hot-air oven, and the mixture is cured by irradiating ultraviolet rays for 3 seconds with a high-pressure mercury lamp (80 w / cm). The cured coating film was not damaged at all even when rubbed with steel wool # 0000, and a coating film having excellent scratch resistance was formed.

Next, a urethane resin clear coating was prepared according to the following formulation.

Main agent Acrylic polyol (Hitaloid 3008, manufactured by Hitachi Chemical Co., Ltd.) 67.0% Octixtin (manufactured by Nippon Chemical Industry Co., Ltd.) 0.1 Methyl ethyl ketone 20.0 Toluene 12.9 Hardener Hexamethylidisocyanate (Sumijur N-, manufactured by Sumitomo Bayer Urethane Co., Ltd.) 75) 100.0% The base resin and the curing agent are mixed at a weight ratio of 6 to 1 and uniformly applied to the other surface of the polycarbonate plate that has been subjected to the hard coating treatment on one side with a spray gun, and is heated in hot air at 80 ° C for 20 minutes. Let dry. The coating thickness was 10 microns. After that, a transfer film made by patterning and printing an ink using a vinyl chloride-vinyl acetate copolymer resin as a binder on a polyester film in advance is heated to 100 ° C. after the coating film applied to the polycarbonate plate is pressed. After cooling to 50 ° C., the polyester film was peeled off, and the pattern was transferred onto the urethane coating film. Next, a urethane resin white paint having the following formulation was prepared.

Main agent Acrylic polyol (Hitaloid 3008, manufactured by Hitachi Chemical Co., Ltd.) 50.0% Titanium white pigment (Taipeku R-82, manufactured by Ishihara Sangyo Co., Ltd.)
0) 20.0 Octic tin (manufactured by Nippon Kagaku Sangyo Co., Ltd.) 0.1 Methyl ethyl ketone 10.0 Toluene 9.9 Hardening agent Hexamethylesi diisocyanate (Sumidur N-75 manufactured by Sumitomo Bayer Urethane Co., Ltd.) 100.0% By weight ratio of main agent and curing agent The mixture was mixed at a ratio of 8 to 1 and uniformly applied to a polycarbonate plate having been subjected to a transfer treatment with a spray gun and dried in hot air of 80 ° C. for 30 minutes. The coating thickness was 10 microns.

The coated film thus patterned adhered firmly to the polycarbonate plate, and was 100/100 in a crosscut cellophane tape peel test.

Example 2 Thickness subjected to hard coating on one side in the same manner as in Example 1.
The urethane resin clear paint described in Example 1 was uniformly applied to the other surface of the 5 mm polycarbonate plate with a spray gun on a 5 mm thick polycarbonate plate and dried in hot air at 80 ° C. for 20 minutes. The coating thickness was 10 microns.
After that, a transfer film made by patterning and printing an ink using a vinyl chloride-vinyl acetate copolymer resin as a binder on a polyester film in advance is heated to 100 ° C. after the coating film applied to the polycarbonate plate is pressed. 50
After cooling to ℃, the polyester film was peeled off and the pattern was transferred onto the urethane coating film.

 Next, a urethane resin black paint was prepared according to the following formulation.

Main ingredient Acrylic polyol (Hitaloid 3008, manufactured by Hitachi Chemical Co., Ltd.) 50.0% Carbon black pigment (Carbon Black MA-100, manufactured by Mitsubishi Chemical Industry Co., Ltd.) 2.0 Octix tin 0.1 Methyl ethyl ketone 25.0 Toluene 22.9 Curing agent Diisocyanate used in Example 1 The main agent and the curing agent were mixed at a weight ratio of 8: 1, and the mixture was uniformly applied to a transfer-treated polycarbonate plate with a spray gun and dried in hot air at 80 ° C. for 30 minutes. The coating thickness was 10 microns.

The patterned coating was firmly adhered to the plastic, and the cross-cut cellophane tape peel test showed 10%.
It was 0/100.

(Effect of the Invention) Since the decorative pattern of the decorative plastic plate of the present invention can be formed by a gravure printing method or the like, the decorative value is high, and the transfer printing layer is sandwiched between the curable resin layers having excellent resistance. Since it is fixed, it has excellent durability and is highly practical as a panel material for indoor and outdoor walls that require semi-permanent use.

[Brief description of the drawings]

1 and 2 are sectional views of the decorative plastic plate of the present invention. The numbers are as follows: 11: plastic plate 12: primer layer 13: transfer printing layer 14: cured resin layer 15: hard coat layer

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-163709 (JP, A) JP-A-53-29811 (JP, A) JP-B-59-1111 (JP, B2) JP-B-61- 57199 (JP, B2)

Claims (2)

(57) [Scope of request for utility model registration] 1. A composition containing a polyisocyanate and a polyol is applied to one surface of a light-transmitting plastic plate, and an isocyanate group and a hydroxyl group in the composition are reacted with each other.
A decorative plastic plate which is cured, forms a primer layer made of a light-transmitting thermosetting polyurethane resin, and then sequentially forms a transfer printing layer and a curable resin layer having concealing properties on the primer layer. 2. The decorative plastic plate according to claim 1, further comprising a hard coat layer having excellent scratch resistance on the other surface of the light-transmitting plastic plate.