JP2002036410A - Resin part with suede coating and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin part with a suede coating which shows excellent touch feeling and has an improved abrasive resistance and a flaw resistance of a pile. SOLUTION: A resin part with a suede coating comprises a first coating, a highly elastic second coating laminated on the first coating and a pile adhering to the second coating wherein the pile is sprayed on the surface of the second coating by means of an air gun.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin part having a suede-like coating and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, a pattern or coating has been applied to the surface of a resin component to improve its appearance and appearance. For example, a grain having fine irregularities is previously formed on a molding die. A method of transferring the grain to the surface of a resin component simultaneously with molding is known. However, even when the grain is applied, the appearance is apparently a resin, and it is difficult to obtain the texture of a natural material to some extent. JP-A-2-1
No. 47668 discloses a technique for applying a coating to obtain a suede-like appearance.

[0003]

However, this method forms a coating film on the surface of the resin and attaches a pile thereon, and can only form a coating film of several tens μm on a hard resin surface. There is a problem that a sufficient soft feeling cannot be obtained in terms of tactile sensation, and there is a problem that the appearance does not have a solid feeling, and sufficient coating performance cannot be obtained in terms of pile abrasion resistance and scratch resistance. There's a problem.

[0004] Under such circumstances, the present invention provides a suede-like coating which is excellent in tactile sensation and appearance, excellent in abrasion resistance and scratch resistance, and can stably hold a raised layer on a resin substrate. It is an object of the present invention to provide a resin component which has been subjected to a resin treatment.

[0005]

Means for Solving the Problems The inventor of the present invention, which has studied diligently to prevent the pile from falling off and improve the abrasion resistance and the damage resistance of the resin parts coated with the above-mentioned suede-like coating, has a specific size of the pile. And found that the physical properties of the coating film serving as a base supporting the pile greatly contributed to the above performance, and completed the present invention.

That is, the present invention relates to (1) a resin part having a base coat formed on a resin part and short fibers adhered to the base coat, wherein the base coat has a first film thickness of 10 to 50 μm. A base coat having a thickness of 20 to 8 having elasticity provided on the first base coat;
Consists of two coats with a second base coat of 0 μm,
The short fibers have a denier of 0.08 to 1.5 and a length of 0.
A resin part having a suede-like coating of 2 to 0.6 mm, (2) the suede according to the above (1), wherein the first base coat is colored and the second base coat is uncolored. Resin parts that have been painted
(3) A first base coat is applied on a resin component, a second base coat is applied, and short fibers are sprayed on an uncured surface of the second base coat with an air gun to raise the surface. And a method for producing a resin part having a suede-like coating.

As described above, in the present invention, the first base coat can impart adhesion to a resin substrate. A pigment may be blended for coloring, and is preferably of the same color as the short fibers. By coloring the first base coat, the resin base material can be hidden. Further, by making the color the same as the pile color, the appearance due to worn out pile is not impaired. The second base coat is
It has elasticity and functions as a cushion layer to improve the softness of the raised layer by the short fibers attached to the surface, thereby contributing to giving a more natural suede-like touch. Therefore, it is preferable that the second base coat does not contain a coloring pigment that impairs the soft feeling, and it is more preferable to use a transparent matte paint. The second base coat has a function of adhering short fibers in an uncured state.

In the present invention, since the second base coat is an elastic layer having a predetermined thickness, the external force applied to the short fibers is concentrated on the joint surface between the short fibers and the coated surface because of the short fibers and the coated surface supporting the short fibers. Therefore, it is possible to reduce the concentration of stress at the joint, improve the wear resistance and the damage resistance, and prevent the fibers from falling off. In order to impart such physical properties to the second base coat, the elongation is preferably 110% or more, more preferably 140% or more, and the tensile strength is 200 kg.
/ Cm ² or more, more preferably 220 kg / cm ² or more,
Initial elasticity value 300 kg / cm ² or more, more preferably 3
A paint that forms a coating film exhibiting 50 kg / cm ² or more is used.

As the paint for forming the first base coat of the present invention, a one-pack acrylic lacquer paint, such as MKX-727 manufactured by Mikasa Paint Co., Ltd., is preferred. Elastic two-pack polyester urethane, for example, Human Clear 885 manufactured by Mikasa Paint Co., Ltd. is preferable.

The short fibers deposited on the second basecoat to form a raised layer are thin short piles of denier 0.08-1.5 and length 0.2-0.6 mm. If the length is less than 0.2 mm, the soft feeling (feel) is low, and if it exceeds 0.6 mm, the spray coat is not uniform, which is not preferable. The material is not particularly limited, but polyester and nylon 6 are used in terms of obtaining light resistance and softness.
6, piles such as rayon are preferred.

The attachment of the short fibers is preferably performed by spraying the uncured second base coat with an electrostatic air gun. The electrostatic flocking method may be used, but in this case, the equipment cost is increased, and the weight per unit area of the pile is increased, resulting in an increase in cost. On the other hand, according to the electrostatic spraying method, the equipment cost is lower than the electrostatic flocking method, the weight per pile is small, and a sufficient suede feel can be obtained with a small amount of piles. Yes, it is cost effective. The material of the resin component used in the present invention is not particularly limited as long as it is a material that can be molded.

[0012]

EXAMPLE 1 Manufacturing Process FIG. 1 shows an example of an automobile interior part, and an upper half of a garnish (center pillar garnish upper, hereinafter referred to as garnish 1) covering the interior side of a center pillar of a vehicle body.
It is. ABS resin (for example, Kaneka ABS E-130)
0) by injection molding. On the surface 2 facing the interior of the room, a grain, which is a fine unevenness previously engraved in a mold, is transferred at the same time as the molding, so as to imitate leather. A clip seat 5, a claw 6, and a boss 7 are integrally formed on a surface 3 corresponding to the back side of the surface 2. The claw 6 and the boss 7 are for accommodating and fixing an impact absorber (not shown) formed of a grid-like rib or the like in the back surface 3 of the garnish 1.

<Coat 1> Surface 2 of this garnish 1
A first base coat. The surface 2 is coated with a one-part acrylic lacquer (for example, MKX-727 manufactured by Mikasa Paint Co., Ltd.) to a thickness of about 20 μm using a spray gun. After coating, it is allowed to stand at room temperature for 5 minutes.

<Coat 2> A second base coat is applied to the first base coat. Using a spray gun, a highly elastic two-pack polyester urethane, for example, Human Clear 885 (manufactured by Mikasa Paint Co., Ltd.) with a film thickness of 40 μm.
m. Select a clear paint that does not contain an extender such as talc or calcium carbonate or a coloring pigment so that the elasticity of the paint itself is not reduced. The physical properties of the coating film of the formed coat 2 are shown below.

Elongation 150% Tensile strength 240 kg / cm ² Initial elasticity 370 kg / cm ²

<Adhesion of Raised Layer> The resin pile is spray-coated with an air gun immediately after the coat 2 is adhered. Resin pile is polyester (fine denier manufactured by Nissen Corporation; trade name)
Is a size of 0.08 d × 0.2 mm. The base coat color and the pile color are set to have similar color tones. After application, bake at 80 ° C. for 30 minutes. The garnish 1 that has been cooled out of the drying oven and cooled to room temperature is blown by blowing compressed air to remove piles that have not been rooted in the base coat (excess piles).

Example 2 Production process A garnish 1 was obtained by injection molding in the same manner as in Example 1 except that a polypropylene resin (for example, Nippon Polychem RC0006) was used instead of the ABS resin.

<Coat 1> Surface 2 of this garnish 1
A first base coat. One-part chlorinated polyolefin paint (for example, P961 manufactured by Mikasa Paint Co., Ltd.)
(L primer) is coated on the surface 2 using a spray gun so as to have a thickness of about 15 μm. After coating, it is allowed to stand at room temperature for 5 minutes.

<Coat 2> A second base coat is applied to the first base coat. Using a spray gun, a highly elastic two-pack polyester urethane, for example, Human Clear 885 (manufactured by Mikasa Paint Co., Ltd.) with a film thickness of 40 μm.
m. Select a clear paint that does not contain an extender such as talc or calcium carbonate or a coloring pigment so that the elasticity of the paint itself is not reduced. The physical properties of the coating film of the formed coat 2 are shown below.

Elongation 150% Tensile strength 240 kg / cm ² Initial elasticity 370 kg / cm ²

<Adhesion of Raised Layer> The coat 2 is in a wet state, that is, immediately after the coat 2 is adhered, a resin pile is spray-coated with an air gun. Resin pile is polyester (fine denier manufactured by Nissen Corporation; trade name)
Is a size of 0.08 d × 0.2 mm. The base coat color and the pile color are set to have similar color tones. After application, bake at 80 ° C. for 30 minutes.

The garnish 1 which has been cooled out of the drying oven and cooled to room temperature is blown by blowing compressed air to remove piles (excess piles) not rooted in the base coat. FIG. 2 is a partially enlarged sectional explanatory view of a molded product.

The pillar garnish 1 obtained through the above steps has a brushed surface, gives a soft image completely different from the appearance of the resin molded product, and has a moist touch. The following tests were performed on the obtained suede-coated resin parts. Test items 1 to 3 were performed on the resin components that were subjected to the following processing.

A Untreated b After low temperature treatment (after leaving at -40 ° C for 1.5 hours) c After heat cycle treatment (after treatment of test item 4) d After high temperature and high humidity treatment (after treatment of test item 5) e After light irradiation treatment (after treatment of test item 7) Table 1 shows the test results.

COMPARATIVE EXAMPLE The coat 2 of the above example was omitted, and the pillar garnish 1
A coat 1 was formed thereon, and a raised layer was applied thereto in the same manner. The obtained pillar garnish 1 has a brushed surface and gives a soft image, but has a hard touch as compared with the examples. Table 1 shows the test results.

Performance Evaluation The performance test method was as follows. The evaluation was performed as follows. 1. Abrasion resistance A campus cloth is pressed and slid with a traverse abrasion tester to perform a wear test. A: Hair loss in the test area, no color difference with the surroundings is observed. B: Hair loss in the test area, almost no color difference with the surroundings is observed. C: Hair loss in the test area, a color difference with the surroundings is recognized. D: Test area. Remarkable hair loss and color difference from the surroundings are recognized. E: Remarkable hair loss is recognized in the test part and the substrate is exposed.

2. Scratch resistance Press a sharp piece with a scratch tester at 500 gf, 10
Draw at a speed of mm / min. The evaluation was performed as follows. A: A trace is hardly recognized B: A trace is recognized, but it is easily leveled with a finger C: A trace is recognized, and it is not leveled with a finger D: A remarkable trace is recognized, and the hair around the trace falls down E: A remarkable trace is recognized Exposure of substrate due to hair loss

3. Peel strength test A 2 × 2 mm L steel material is adhered and pulled at a speed of 200 mm / min. As a result, a peel strength of 9.8 N / cm width or more was judged to be acceptable.

4. Heat resistance cycle 90 ° C x 4 hours-room temperature x 0.5 hours--40 ° C x 1.5
After 4 cycles of 1 cycle from time to room temperature × 0.5 hour, if there was no harmful deformation, discoloration, hair removal, etc., the test was passed.

5. Room temperature 30 after holding at 70 ° C x 95RH x 24 hours in an oven
Allowed to stand for a minute and visually inspected. As a result, if there was no deformation, discoloration, hair removal, etc., it was judged as acceptable.

6. Chemical resistance Rub with gauze after spot adhesion of the following chemicals. as a result,
If there was no gloss sink, stain, swelling, softening, peeling, etc., it was judged as acceptable. a. Gasoline b. Light oil c. Engine oil d. Gear oil e. AT oil f. Grease g. Kerosene h. Artificial sweat i. detergent

7. Accelerated lightfastness Exposure to sunshine weatherometer for 300 hours. As a result, a grade A external appearance and a gray scale third grade or higher were evaluated as acceptable.

[0033]

[Table 1]

[0034]

As described above, since the raised layer is formed on the high elasticity coating layer, a moist feeling as a tactile feeling is obtained, and the raised layer is stably held on the resin component. Therefore, it is possible to provide a resin part having excellent suede-like coating.

[Brief description of the drawings]

FIG. 1 is an illustration of a center pillar garnish upper (garnish 1) showing an embodiment of the present invention.

FIG. 2 is a partially enlarged sectional explanatory view of the same.

[Explanation of symbols]

 Reference Signs List 1 garnish 2 indoor side surface 3 back side of 2 5 clip seat 6 claw 7 boss

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08J 7/04 CER C08J 7/04 CRE C09D 5/00 C09D 5/00 D 5/28 5/28 201 / 00 201/00 // C08L 101: 00 C08L 101: 00 F term (reference) 4D075 AA02 AA09 AE06 DB31 EB22 EB35 EB38 EC22 EC51 4F006 AA04 AA12 AA15 AA22 AA58 AB24 AB37 BA01 BA02 CA04 DA04 4F100 AK01B AK01 BAK07 AT04AK42 BA10A BA10D CC00B CC00C DG03D DG08D GB33 HB00B JK07C JK09 JL00 JL10B 4J038 BA092 CG001 DD002 DH002 KA08 KA19 NA01 PA07 PC08

Claims (3)

[Claims] A base coat is formed on a resin component,
A resin component having short fibers adhered on the base coat, wherein the base coat has a first thickness of 10 to 50 μm.
And a second base coat having an elastic film thickness of 20 to 80 μm provided on the first base coat. The short fiber has a denier of 0.1.
A resin part having a suede-like coating, wherein the resin part has a length of 08 to 1.5 and a length of 0.2 to 0.6 mm. 2. The method according to claim 1, wherein the first base coat is colored,
2. The resin part according to claim 1, wherein the second base coat is non-colored. 3. A method of applying a first base coat on a resin part, applying a second base coat, and spraying short fibers on an uncured surface of the second base coat with an air gun to raise the hair. A method for producing resin parts with a characteristic suede-like coating.