JPH0412814A - Decorated panel and manufacture thereof - Google Patents

Abstract

PURPOSE:To obtain a panel having no recessed and protruding parts of patterns in its surface and having excellent durability and abrasion resistance of the patterns by preliminarily printing patterns in a first molding plate in use of ink containing a release agent and injection molding resin into the molding mold in which the patterns are turned inside and manufacturing a panel thereby. CONSTITUTION:On the one surface 1a of a sheet of inorganic glass 1, patterns 4 are printed by ink. The ink used herein consists of resin of being soluble into pigment, release agent, organic solvent, and the organic solvent. Next, for rendering the surface of the inorganic glass with printed patterns inside, a sheet of approximately identical inorganic glass 5 is opposed thereto and, for making the distance between the inorganic glasses 1 and 5 have a desired breadth, gaskets 2 made of flexible vinyl chloride or the like are inserted into the utmost outer peripheral parts of the inorganic glasses 1 and 5 and secured thereto by clips 3 and, into the mold constructed by an aforementioned manner, the molten resin of thermosetting resin is injected and then heat- cured, after that, removed from the molding mold for obtaining a painted panel 6. The thus obtained decorated panel 6 has utterly no recessed and protruded feelings because the ink part 4 is taken into the panel and therefore has a flat surface thereon. In consequence thereof, the painted parts are not likely to wear.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a painted panel in which a design pattern or a decorative pattern is applied to the surface portion of the panel, particularly for automobile windows or decorative panels, and residential use. This invention relates to a painted panel that can be used as a core, etc., and a method for manufacturing the same.

(Prior Art) Conventionally, spray painting methods, screen printing methods, hot stamping methods, and the like are known and widely used as methods for painting patterns on panel surfaces. In these methods, since a pattern is applied to a pre-formed resin using ink or the like, the surface of the resin has unevenness due to the pattern, and this unevenness causes wear of the pattern. Therefore, JP-A-61-12
The method disclosed in Publication No. 0'74 is to apply a hard coat film applied to prevent friction and a plastic film with a pattern printed on the surface of the resin, and to apply the hard coat film applied to the plastic film to the resin surface. This is a method of manufacturing patterned glass in which resin is laminated on the back side and molded so as to form a single piece. The surface of the patterned glass formed by this method is covered with a hard coat film, so the pattern does not easily wear out.

(Problems to be Solved by the Invention) However, the above-mentioned method has problems with the adhesion between the plastic film and the resin layer, and between the plastic film and the hard coat film. There was also the problem that the number of parts increased, and therefore the number of processes also increased. Therefore, the technical problem of the present invention is to provide a painted panel with excellent abrasion resistance without requiring a large number of parts or processes, and a method for manufacturing the same.

(Structure of the invention) (Means for solving the problem) The technical solution taken in the present invention to solve the above technical problem is that the ink part is embedded in a panel formed by casting molten resin. The method for manufacturing the panel includes (a) printing a pattern on at least one side of the first molded plate and the second molded plate with ink containing a release agent; A second molded plate is arranged in parallel so as to face the pattern-printed surface of the first molded plate, and the first molded plate and the second molded plate are arranged at the outermost periphery between the first molded plate and the second molded plate. (c) casting a molten resin into the mold to form a panel;
D) The method includes the step of taking out the puffer from the mold.

The first molding plate and the second molding plate constitute a part of the mold. The shape of the first molded plate can be appropriately selected depending on the shape of the panel to be manufactured, and the material is made of inorganic glass and resin such as polyethylene.

Ink is used to print designs, including pigments, release agents,
The ink composition is composed of an organic solvent and a resin soluble in the organic solvent, and a dispersant or the like may be added if necessary. The release agent is one that is soluble in the organic solvent contained in the ink composition and is hardly volatile or nonvolatile,
By enveloping the pigment or resin in the ink composition or during its drying process, a film that is easily peeled off from the mold is formed. Specifically, higher fatty acid esters, liquid paraffin, glycols, etc. are used, but other known components can also be used.

(Operation) The above technical solution operates as follows. That is,
In the process of manufacturing a panel by printing a design on the first molding plate in advance and casting resin into a mold that uses the design part of the first molding board inside, the ink is incorporated into the resin. The surface of the panel including the surface is along the first molded plate.

In this way, the unevenness of the pattern on the panel surface is eliminated, and a panel with excellent pattern durability and abrasion resistance can be manufactured.

(Example) An example of the present invention will be described based on FIGS. 1, 2, and 3. This embodiment is applied to a quarter window glass of an automobile.

Example 1 FIG. 1 shows an inorganic glass 1 serving as a first molded plate.

First, a pattern 4 is printed with ink on one side 1a of the inorganic glass 1. The ink used in Example 1 was composed of a pigment, a release agent, an organic solvent, and a resin compatible with the organic solvent. Specifically, 5 parts by weight of carbon black as a pigment, 10 parts by weight of n-butyl stearate as a release agent, 30 parts by weight of methyl ethyl ketone, 30 parts by weight of methyl isobutyl ketone as an organic solvent, and n-butyl acetate. This is an ink consisting of 20 parts by weight of the organic solvent, and 5 parts by weight of vinyl chloride-vinyl acetate copolymer as a resin soluble in the organic solvent. 4 in FIG. 2 shows the ink portion of the printed design.

Next, create a mold. Inorganic glasses 5 having substantially the same shape are placed opposite each other so that the surface 1a of the inorganic glass 1 on which the pattern is printed is on the inside. A soft vinyl chloride gasket 2 (sealing member) is attached to the outermost periphery of the inorganic glasses 1 and 5 and fixed with scissors clips 3 so that the gap between the inorganic glasses 1 and 5 has a desired width to form a mold.

A molten thermosetting resin (RAV7 manufactured by Mitsui Petrochemicals) was injected into this mold, heated and cured, and then removed from the mold to obtain a painted panel 6.

As shown in FIG. 3, the painted panel 6 obtained in this example has no unevenness in the design part because the ink part 4 is incorporated into the panel, and is as flat as the surface of the panel without the design part. has a certain side. Therefore,
The design part is less likely to wear out, and the design on which the painted panel was manufactured can be maintained for a long time. Also,
Since there is no need for materials such as hard coat films or plastic films to protect the designs from wear, panels with pictures can be obtained with fewer parts, the number of processes can be reduced, and the cost can be lowered. .

Example 2 Example 2 of the present invention will be described. The painted panel of Example 2 uses polyethylene resin for the first molded plate and the second molded plate, and the ink is made of pigment, release agent, organic solvent, and soluble in the organic solvent, as in Example 1. An ink made of resin was used. Specifically, 5 parts by weight of Shinian blue as a pigment, 10 parts by weight of liquid paraffin as a release agent, 50 parts by weight of ethanol as an organic solvent, 15 parts by weight of isopropyl alcohol, and n-
The ink is composed of 20 parts by weight of butanol and 5 parts by weight of polyvinyl butyral (Denka Butyral 3000-2 manufactured by Denki Kagaku Kogyo) as a resin soluble in the organic solvent. The method for forming the illustrated panel is the same as in Example 1.

In the illustrated panel according to Example 2, there is no unevenness in the patterned portion, and the patterned portion has a flat surface similar to the surface without the patterned portion of the panel, making the patterned portion resistant to wear.

Evaluation of Example 1 and Example 2 Regarding the illustrated panel of Example 1 and the illustrated panel of Example 2 described above, the surface roughness of the panel surface with a pattern was tested. The test was performed using a surface roughness meter. As shown in Table 1, the test results were 0 μm for both the illustrated panel of Example 1 and the illustrated panel of Example 2.

Furthermore, the abrasion resistance of the patterned panel surface of the illustrated panel of Example 1 and the illustrated panel of Example 2 was tested. The test was carried out using a Taber abrasion tester with a load of 500g.
The appearance after 000 rotations was observed. As a result of the test, no peeling of the design was observed in both the illustrated panel of Example 1 and the illustrated panel of Example 2.

Furthermore, the weather resistance of the panel surface with a pattern was tested for the illustrated panel of Example 1 and the illustrated panel of Example 2.

The test was conducted using an accelerated weathering tester, and the black panel temperature was 8.
After processing at 3 degrees for 1000 hours, the appearance was observed. As for the test results, no abnormality was observed in both the illustrated panel of Example 1 and the illustrated panel of Example 1, and the condition was the same as before the test.

Comparative Example 1 Next, as Comparative Example 1 of the present invention, inorganic glass was used as the first molded plate and the second molded plate in the same manner as in Example 1, but a pattern was not printed on the inorganic glass in advance. The panel was molded without any problems.

The formed panel was screen printed (200 meshes) using water-soluble acrylic ink to produce a panel with a picture.

Comparative Example 2 As Comparative Example 2 of the present invention, after printing a pattern on a polycarbonate resin panel using urethane paint,
A clear coat was applied to the entire surface of a polycarbonate resin panel using an acrylic heart coat agent to produce a panel with a picture.

Evaluation of Comparative Example 1 and Comparative Example 2 Regarding Comparative Example 1 and Comparative Example 2, the surface roughness, abrasion resistance, and weather resistance of the patterned panel surface were similarly tested. As shown in Table 1, the test results show that the surface roughness of Comparative Example 1 was 15 μm, and the surface roughness of Comparative Example 2 was 2 μm, with pattern irregularities appearing on the surface in both cases. Regarding abrasion resistance, no peeling of the design was observed in Comparative Example 2, but peeling of the design was observed in Comparative Example 1.

Furthermore, regarding weather resistance, peeling of the pattern was observed in Comparative Example 1, and peeling of the clear coating was observed in Comparative Example 2.

〔Effect of the invention〕

The painted panel obtained by the present invention has no unevenness in the design part because the ink part is incorporated into the panel, and has a flat surface similar to the surface of the panel without the design part. Therefore, the design part is less likely to wear out, and the design of the painted panel can be maintained for a long time. In addition, since there is no need for materials such as hard coat films or plastic films to protect the designs from wear, it is possible to obtain painted panels with fewer parts, reducing the number of processes, and lowering the cost. I can do it.

Table 1

[Brief explanation of drawings]

The first part shows the first molded plate used in manufacturing the painted panel of Example 1 of the present invention, Figure 2 shows a cross-sectional view of the manufacturing process of the painted panel, and Figure 3 shows a cross-sectional view of the painted panel after molding. show. Explanation of symbols 1: Inorganic glass (first molded plate), 2: Gasket (
Seal member), 3...Clip, 4...Ink part, 5
...Inorganic glass (second molded plate), 6...Panel with picture. Patent registration applicant Aisin Seiki Co., Ltd. Representative Shigeo Aiki

Claims (2)

[Claims] (1) A painted panel characterized in that an ink portion is embedded in a panel formed by casting molten resin. (2) (a) A step of printing a pattern on at least one side of the first molded plate and the second molded plate with ink containing a release agent, (
b) A second molded plate is arranged in parallel so as to face the pattern-printed surface of the first molded plate, and the first molded plate and the (c) forming a mold by disposing a sealing member so that the second molding plate has a desired spacing;
A method for manufacturing a painted panel, comprising the steps of: molding the panel; and (d) taking out the panel from the mold.