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Decorative resin molded article and its production method

a technology of decorative resin and molded articles, which is applied in the direction of instruments, electric/magnetic/electromagnetic heating, other domestic articles, etc., can solve the problems of difficult drawing out of the mold of the article, difficulty in operation, and difficulty in imparting concave and convex patterns to the side section including curved surface shape parts

Inactive Publication Date: 2012-08-02
SEIREN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]A decorative resin molded article of an embodiment includes a resin sheet having, as formed on one side thereof, one or more convex projections made of an ink containing a UV-curable resin and a colorant, and therefore having, on that one side thereof, a design of a color pattern and a concave and convex pattern synchronizing with each other, and a resin injection-molded body as laminated and integrated on the other side of the resin sheet through. injection molding of a synthetic resin thereon.
[0013]A method for producing a decorative resin m

Problems solved by technology

In this method, the concave and convex pattern could be given to the planar section of the molded article, however, the concave and convex pattern is difficult to impart to the side section including curved surface shape parts thereof.
This is because, when the molded article is drawn out from the mold and when the molded article has concaves and convexes on the side thereof, then the article is difficult to draw out from the mold, therefore bringing about a problem in operation.

Method used

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  • Decorative resin molded article and its production method
  • Decorative resin molded article and its production method
  • Decorative resin molded article and its production method

Examples

Experimental program
Comparison scheme
Effect test

example 1

1. Preparation of Coating Material for Forming Base Layer

Preparation of Pigment Concentrate for Coating Material for Forming Base Layer

[0074]1) trade name “BPZ 6340” (Toyo Aluminium's aluminium paste): 20 parts by weight

2) trade name “Acrydic WXU-880” (DIC's acrylic resin): 50 parts by weight

3) trade name “Acrydic WXU-616” (DIC's acrylic resin): 70 parts by weight

4) methyl isobutyl ketone: 12.5 parts by weight

5) xylene: 12.5 parts by weight

[0075]The above-mentioned materials were mixed in a mixer, and dispersed in a bead mill for 3 hours to prepare a pigment concentrate for a coating material for base layer formation.

Preparation of Coating Material for Forming Base Layer

[0076]1) the pigment concentrate prepared above: 100 parts by weight

2) methyl isobutyl ketone: 25 parts by weight

3) xylene: 25 parts by weight

4) butyl acetate: 25 parts by weight

5) toluene: 25 parts by weight

6) trade name “Burnock DN-980” (DIC's crosslinking agent, polyisocyanate prepolymer): 10 parts by weight

[0077]...

example 2

1. Preparation of Coating Material for Forming Top Layer

[0091]1) trade name “Piagiass #8000 TC-307” (Dai Nippon Toryo's acryl / urethane resin coating material): 100 parts by weight

2) trade name “TXIB” (Eastman Chemical Japan's diluent for curing agent, 2,2,4-trimethyl-1,3-pentanediol diisobutyrate): 1 part by weight

3) trade name “Parkadox 16” (Kayaku Akzo's curing agent, di-(4-tert-butylcyclohexyl)peroxy dicarbonate, 4-(1,1-dimethylethyl)cyclohexanol): 1 part by weight

[0092]Of the above-mentioned materials, 2) and 3) were stirred and defoamed in a rotation / revolution mixer in vacuum, then the material 1) was added thereto and further stirred and defoamed to prepare a coating material for top layer formation.

2. Formation of Top Layer

[0093]In the same manner as in Example 1, a base layer and convex projections were formed on a polycarbonate film, which was then die-cut, and integrated with a resin injection-molded body according to an insert molding method; and then the coating materia...

example 3

1. Preparation of Coating Material for Forming Top Layer

Preparation of Liquid A

[0096]1) trade name “Sorless Clear NDP-300 UT” (Hamani Paint's polyester resin coating material): 50 parts by weight

2) trade name “Sorless Diluent No. 1000” (Hamani Paint's diluent for polyester resin): 5 parts by weight

3) trade name “Parmeck N” (NOF's curing agent for polyester resin): 2.8 parts by weight

[0097]The above-mentioned materials were mixed with a spatula to prepare 57.8 parts by weight of a liquid A.

Preparation of Liquid B

[0098]1) trade name “Sorless Clear NDP-300 UT” (Hamani Paint's polyester resin coating material): 50 parts by weight

2) trade name “Sorless Diluent No. 1000” (Hamani Paint's diluent for polyester resin): 5 parts by weight

3) cobalt octylate: 1 part by weight

[0099]The above-mentioned materials were mixed with a spatula to prepare 56 parts by weight of a liquid B.

[0100]The above-prepared liquid A and liquid B were mixed with a spatula to prepare a coating material for top layer f...

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Abstract

A decorative resin molded article includes a resin sheet having, as formed on one side thereof, convex projections made of an ink containing a UV-curable resin and a colorant, and therefore having, on that one side thereof, a design of a color pattern and a concave and convex pattern synchronizing with each other, and a resin injection-molded body as laminated and integrated on the other side of the resin sheet through injection molding of a synthetic resin thereon.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2011-16593, filed on Jan. 28, 2011; the entire contents of which are incorporated herein by reference.BACKGROUND[0002]1. Technical Field[0003]The disclosure relates to a decorative resin molded article given an appearance with a concave and convex impression on the surface thereof, and to a method for producing the article.[0004]2. Related Art[0005]Heretofore, for imparting an appearance with a concave and convex impression to the surface of a synthetic resin molded article, there is known a method of previously forming concaves and convexes on the cavity surface of an injection mold and giving the concave and convex pattern to the surface of the injection molded article. In this method, the concave and convex pattern could be given to the planar section of the molded article, however, the concave and convex pattern is difficul...

Claims

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Application Information

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IPC IPC(8): B32B3/00B29C59/16
CPCB29C45/14688B29C45/14811B29C2037/0042Y10T428/24802B29C2045/14729B29K2995/002B29C2045/14704B29C45/1671B29L2031/722
Inventor TANIDA, IKUHIROUEKI, TAKAAKI
Owner SEIREN CO LTD