JP3651884B2 - Resin parts with suede-like coating and manufacturing method - Google Patents

Description

【００３４】
【発明の効果】
以上のように、高弾性のコート層を形成した上に起毛層を形成させたので、触感としてのしっとり感が得られると共に、樹脂部品に対して起毛層が安定して保持されるので、優れたスウェード調塗装を施した樹脂部品を提供することができる。
【図面の簡単な説明】
【図１】本発明の実施例を示すセンターピラーガーニッシュアッパー（ガーニッシュ１）の説明。
【図２】同部分拡大断面説明図。
【符号の説明】
１ ガーニッシュ
２ その室内側表面
３ ２の裏面側
５ クリップ座
６ 爪
７ ボス[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a resin component subjected to suede-like coating and a method for producing the same.
[0002]
[Prior art]
Conventionally, the surface of resin parts has been given a pattern or paint to improve its appearance and appearance. For example, a textured surface that is fine irregularities is formed on a molding die in advance, and resin parts are formed simultaneously with molding. There is known a method for transferring the texture on the surface of the film. However, even if it is textured, it has an appearance that can be seen as a resin at a glance, and it is difficult to obtain the texture of natural materials.
Japanese Patent Application Laid-Open No. 2-147668 discloses a technique for performing coating for the purpose of obtaining a suede-like appearance.
[0003]
[Problems to be solved by the invention]
However, this forms a coating film on the surface of the resin and deposits a pile on it, and can only form a coating film of several tens of μm on the surface of a hard resin. In other words, there is a problem that the appearance does not have a feeling of fleshiness, and there is a problem that sufficient film performance cannot be obtained in terms of abrasion resistance and scratch resistance of the pile.
[0004]
Under such circumstances, the present invention is a resin having a suede-like coating that is excellent in tactile sensation and appearance, is excellent in abrasion resistance and scratch resistance, and can stably hold a raised layer on a resin base material. The purpose is to provide parts.
[0005]
[Means for Solving the Problems]
An inventor who has made extensive investigations on the improvement of wear resistance and scratch resistance by preventing the pile from falling off from resin parts with the above-mentioned suede-like coating, is the base that supports the pile with specific dimensions of the pile. The present inventors have found that the physical properties of the coating film greatly contribute to the above performance and have completed the present invention.
[0006]
(1) A resin part in which a base coat is formed on a resin part, and short fibers are attached on the base coat. The base coat includes a first base coat having a film thickness of 10 to 50 μm, and the first base coat. The short fiber has a denier of 0.08 to 1.5 and a length of 0.2. The second base coat functions as a cushion layer having an elastic film thickness of 20 to 80 μm. A resin product with a suede-like coating characterized by being 0.6 to 0.6 mm;
(2) A resin product subjected to suede-like coating according to (1), wherein the second base coat is a coating film having an elongation of 110 ° C. or more and an initial elastic value of 300 kg / cm ² or more,
(3) The resin product subjected to suede-like coating according to the above (1) or (2), wherein the first base coat is colored and the second base coat is uncolored,
(4) The first base coat is applied on the resin component, the second base coat is then applied, and the short base fiber is sprayed with an air gun on the surface of the second base coat in an uncured state, and is raised. The production method of resin products with suede-like coating
(5) The method for producing a resin product subjected to suede-like coating according to (4), wherein the second base coat has an elongation of 110 ° C. or more and an initial elastic value of 300 kg / cm ² or more .
[0007]
As described above, in the present invention, the first base coat can impart adhesion to the resin base material. A pigment may be blended for coloring, and is preferably the same color as the short fiber. The resin base material can be concealed by coloring the first base coat. Further, by using the same color as the pile color, the appearance of the pile due to wear is not impaired. The second base coat has elasticity and contributes to providing a more natural suede feel by improving the soft feeling of the raised layer by the short fibers attached to the surface functioning as a cushion layer. Therefore, it is preferable that the second base coat does not contain a color 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 attaching short fibers in an uncured state.
[0008]
In the present invention, the second base coat is an elastic layer having a predetermined thickness, so that the external force applied to the short fibers is not concentrated on the joint surface with the coating surface due to the relationship between the short fibers and the coating surface that supports the short fibers. Therefore, the concentration of stress on the joint can be reduced, the wear resistance and the scratch resistance can be improved, and the fibers can be prevented 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, the tensile strength is 200 kg / cm ² or more, more preferably 220 kg / cm ² or more, and the initial elasticity. A paint that forms a coating film having a value of 300 kg / cm ² or more, more preferably 350 kg / cm ² or more is used.
[0009]
As the coating material forming the first base coat of the present invention, a one-component acrylic lacquer coating material such as MKX-727 manufactured by Mikasa Paint Co., Ltd. is preferable, and as the coating material forming the second base coating material, a highly elastic two-layer coating material is used. Liquid polyester urethane, for example, Human Clear 885 manufactured by Mikasa Paint Co., Ltd. is preferable.
[0010]
The short fibers deposited on the second base coat to form the raised layer are thin and short piles having a denier of 0.08 to 1.5 and a length of 0.2 to 0.6 mm. If the length is less than 0.2 mm, the soft feeling (texture) is low, and if it exceeds 0.6 mm, the spray coating is not uniform, which is not preferable. Although there is no restriction | limiting in particular as a material, Pile of polyester, nylon 66, rayon etc. is preferable at the point which obtains light resistance performance and a soft feeling.
[0011]
The short fibers are preferably attached 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 basis weight of the pile is excessive, which increases the cost. In contrast, according to the electrostatic spray method, the equipment cost is lower than that of the electrostatic flocking method, the weight of the pile is small, and a sufficient suede feel can be obtained with a small amount of pile. This is cost effective. In addition, if the material of the resin component used for this invention is a material which can be shape | molded, there will be no restriction | limiting in particular.
[0012]
【Example】
Example 1
Manufacturing Process FIG. 1 is an example of an interior part for an automobile, and is 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. An ABS resin (for example, Kaneka ABS E-1300) is injection-molded. The surface 2 facing the room is imprinted with imprints which are fine irregularities engraved in advance on the mold at the same time as molding, imitating leather. A clip seat 5, a claw 6, and a boss 7 are integrally formed on the surface 3 corresponding to the back side of the surface 2. The claws 6 and the bosses 7 are for accommodating and fixing an impact absorber (not shown) composed of lattice ribs or the like in the back surface 3 of the garnish 1.
[0013]
<Coat 1>
A first base coat is applied to the surface 2 of the garnish 1. A one-component acrylic lacquer (for example, MKX-727 manufactured by Mikasa Paint Co., Ltd.) is coated on the surface 2 to a thickness of about 20 μm using a spray gun. After coating, leave at room temperature for 5 minutes.
[0014]
<Coat 2>
A second base coat is applied to the first base coat. A highly elastic two-component polyester urethane such as Human Clear 885 (manufactured by Mikasa Paint Co., Ltd.) is coated using a spray gun so as to have a film thickness of about 40 μm. Clear paint that does not contain extender pigments and colored pigments such as talc and calcium carbonate is selected so that the elasticity of the paint itself is not diminished.
The physical properties of the formed coating film of Coat 2 are shown below.
[0015]
Elongation 150%
Tensile strength 240kg / cm ²
Initial elastic value 370 kg / cm ²
[0016]
<Brushing layer adhesion>
The coat 2 is wet, that is, immediately after the coat 2 is deposited, the resin pile is spray-coated with an air gun. The resin pile is polyester (fine denier manufactured by Nissen Co., Ltd .; trade name) and has a size of 0.08 d × 0.2 mm. Note that the base coat color and the pile color are matched to similar colors. After application, bake at 80 ° C. for 30 minutes.
The garnish 1 that has been taken out of the drying oven and allowed to cool and then cooled to room temperature is blown by blowing compressed air to remove the pile that has not taken root in the base coat (excess pile).
[0017]
Example 2
Manufacturing process Example 1 Instead of the ABS resin, a garnish 1 was obtained by injection molding in the same manner using a polypropylene resin (for example, Nippon Polychem RC0006).
[0018]
<Coat 1>
A first base coat is applied to the surface 2 of the garnish 1. A one-component chlorinated polyolefin-based paint (for example, P961L primer manufactured by Mikasa Paint Co., Ltd.) is coated on the surface 2 to a film thickness of about 15 μm using a spray gun. After coating, leave at room temperature for 5 minutes.
[0019]
<Coat 2>
A second base coat is applied to the first base coat. A highly elastic two-component polyester urethane such as Human Clear 885 (manufactured by Mikasa Paint Co., Ltd.) is coated using a spray gun so as to have a film thickness of about 40 μm. Clear paint that does not contain extender pigments and colored pigments such as talc and calcium carbonate is selected so that the elasticity of the paint itself is not diminished.
The physical properties of the formed coating film of Coat 2 are shown below.
[0020]
Elongation 150%
Tensile strength 240kg / cm ²
Initial elastic value 370 kg / cm ²
[0021]
<Brushing layer adhesion>
The coat 2 is wet, that is, immediately after the coat 2 is deposited, the resin pile is spray-coated with an air gun. The resin pile is polyester (fine denier manufactured by Nissen Co., Ltd .; trade name) and has a size of 0.08 d × 0.2 mm. Note that the base coat color and the pile color are matched to similar colors. After application, bake at 80 ° C. for 30 minutes.
[0022]
The garnish 1 that has been taken out of the drying oven and allowed to cool and then cooled to room temperature is blown by blowing compressed air to remove the pile that has not taken root in the base coat (excess pile).
FIG. 2 is a partially enlarged cross-sectional explanatory view of a molded product.
[0023]
The pillar garnish 1 obtained through the above steps has a raised surface, gives a soft image completely different from the appearance of the resin molded product, and has a moist feel. The following tests were conducted on the obtained suede-like painted resin parts. Test items 1 to 3 were performed on the resin components subjected to the following treatment.
[0024]
a Untreated b After low temperature treatment (after leaving at -40 ° C for 1.5 hours)
c After heat cycle treatment (after test item 4 treatment)
d After high temperature / high humidity treatment (after treatment of test item 5)
e After light irradiation treatment (after treatment of test item 7)
The test results are shown in Table 1.
[0025]
Comparative Example The coat 2 of the above example was omitted, the coat 1 was formed on the pillar garnish 1, and a brushed layer was applied thereto by the same method.
Although the obtained pillar garnish 1 has a raised surface and gives a soft image, the tactile sensation is harder than that of the example. The test results are shown in Table 1.
[0026]
The performance evaluation performance test method was as follows. Evaluation was performed as follows.
1. The wear test is performed by pressing and sliding the campus fabric with a wear-resistant traverse type wear tester.
A: No hair loss in the test area and no color difference with the surrounding area B: No hair loss in the test area and almost no color difference with the surrounding area C: No hair loss in the test area and no color difference with the surrounding area D: In the test area Evidence of remarkable hair loss and color difference from the surrounding area E: Remarkable hair loss is observed in the test site, and exposure of the substrate is observed. [0027]
2. The sharp piece is pressed with a scratch-resistant scratching tester and is drawn at a speed of 500 gf and 10 mm / min. Evaluation was performed as follows.
A: Almost no traces B: Traces are recognized, but can be easily leveled with fingers C: Traces can be easily detected with fingers, cannot be leveled D: Remarkable traces are observed, and hair around the traces falls E: Remarkable traces are observed In addition, exposure of the substrate is recognized due to hair loss [0028]
3. Peel strength test A 2 × 2 mm L steel material is bonded and pulled at a speed of 200 mm / min. As a result, a peel strength of 9.8 N / cm width or more was regarded as acceptable.
[0029]
4). Heat-resistant cycle 90 ° C x 4 hours to room temperature x 0.5 hours to -40 ° C x 1.5 hours to room temperature x 0.5 hours. After 4 cycles, if there is no harmful deformation, discoloration, hair removal, etc., pass It was.
[0030]
5. After holding at 70 ° C. × 95 RH × 24 hours in a moisture-resistant oven and leaving at room temperature for 30 minutes, a visual inspection was conducted.
[0031]
6). Chemical resistance Scrap with gauze after spot attachment of the following chemicals. As a result, if there was no gloss sink, stain, swelling, softening, peeling, etc., the test was accepted.
a. Gasoline b. Light oil c. Engine oil d. Gear oil e. AT oil f. Grease g. Kerosene h. Artificial sweat i. Detergent [0032]
7. The accelerated light-resistant sunshine weatherometer was exposed for 300 hours, and as a result, the grade A appearance and the grayscale grade 3 or higher were accepted.
[0033]
[Table 1]

[0034]
【The invention's effect】
As described above, since the raised layer is formed on the highly elastic coating layer, a moist feeling as a tactile sensation is obtained, and the raised layer is stably held against the resin component, which is excellent. Resin parts with suede-like coating can be provided.
[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 cross-sectional explanatory view of the same part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Garnish 2 The indoor side surface 3 The back surface side 2 2 Clip seat 6 Claw 7 Boss

Claims (5)

A resin part in which a base coat is formed on a resin part, and short fibers are attached on the base coat. The base coat is provided on a first base coat having a film thickness of 10 to 50 μm and the first base coat. It is composed of two coats with a second base coat that functions as a cushioning layer having an elastic film thickness of 20 to 80 μm, and the short fibers have a denier of 0.08 to 1.5 and a length of 0.2 to 0.00. Resin product with suede-like coating, characterized by being 6 mm. The second base coat has an elongation of 110% or more and an initial elastic value of 300 kg / cm. ² The resin product having a suede-like coating according to claim 1, which is the above-mentioned coating film.   The resin product having a suede-like coating according to claim 1 or 2, wherein the first base coat is colored and the second base coat is uncolored.   A first base coat is applied on a resin part, then a second base coat is applied, and then a short fiber is sprayed with an air gun on the surface of the second base coat in an uncured state and raised, A method for producing painted resin products. The second base coat has an elongation of 110 ° C. or higher and an initial elastic value of 300 kg / cm. ² The method for producing a resin product having a suede-like coating according to claim 4, which is the above-mentioned coating film.

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