JP2006231136A - Delustering method, production method for surface-decorated article and surface-decorated article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a delustering method capable of certainly delustering a clear coat layer. <P>SOLUTION: The surface-decorated article 1 is provided with a resin molding 2; a printing layer 3 formed on the surface of the resin molding 2; and the clear coat layer 4 formed so as to cover the printing layer 3. Fine recession/projection 4a is formed on the surface of the clear coat layer 4 by performing an ice-particle blast treatment and the surface is delustered. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a matting method for removing the gloss of a clear coat layer, a method for producing a surface decoration product, and a surface decoration product.

  In automotive interior parts, many surface decorations (for example, console boxes, instrument panels, armrests, etc.) that add decoration to the surface of the molded body by hydraulic transfer to improve design and quality have been put to practical use. ing. Here, hydraulic transfer refers to a technology in which a special film is floated on the surface of the water, and a predetermined pattern (pattern such as a wood grain pattern or geometric pattern) printed on the film is transferred to the surface of the molded body by water pressure. Say. This technique has the advantage that printing on a three-dimensional curved surface can be performed accurately and easily.

  In the surface decoration product decorated by the hydraulic transfer, a clear coat layer for protecting the decoration is formed on the surface. In addition, there is a demand for the surface decoration product to be partially matted depending on the product concept. Specifically, some surface decorations of automobiles (for example, instrument panels) have a glossy transparent clear coat layer. It is necessary to perform matting to suppress reflection.

  When manufacturing this surface decoration product, two types of paints, a clear paint for gloss and a clear paint for matte, are required. Therefore, at the time of painting, when the clear paint is replaced, the coating machine must be washed, and productivity is lowered. In addition, matting clear paints such as silica are mixed in matting clear paint, but the matting agent sinks heavily into the paint, so it is difficult to maintain the matte quality without frequent stirring. Also, there is a problem that productivity is lowered to maintain the quality.

  In order to solve such problems, the present applicant has proposed a technology in which a clear coat layer is formed with a glossy clear paint, and the surface is made to have a number of dents to reduce its gloss. (For example, refer to Patent Document 1).

Furthermore, the present applicant has also studied a method of forming irregularities on the surface of the clear coat layer by sand blasting or shot blasting to reduce the gloss of the surface.
JP 2001-276725 A

  By the way, the technique currently disclosed by patent document 1 makes a dent on the surface of a clearcoat layer using a pressing die. Therefore, it is difficult to make a depression with a pressing die for a complicated shape having a three-dimensional curved surface, which is a shape that is good at hydraulic transfer, and the gloss of the clear coat layer cannot be accurately reduced.

  Also, according to the technique (so-called drive blast treatment) in which blasting material (sand particles or steel particles) is sprayed under dry conditions by sandblasting or shot blasting, irregularities are formed on the surface of the clear coat layer in products with complex shapes. It is considered possible to do it. However, since the clear coat layer is relatively soft, if a hard blast material is used, the clear coat layer is excessively shaved and the print layer is damaged, or the blast material remains on the surface of the clear coat layer. In this case, since the blast material is sprayed, static electricity is generated and dust or the like adheres to the surface of the resin molded body, which deteriorates the appearance quality of the product.

  Furthermore, a method of forming irregularities on the clear coat layer by chemical treatment using chemicals is also conceivable, but when the back surface of the resin molding is exposed, the resin molding is It may be possible to take damage.

  In the above, the case of a surface decoration product that is decorated by hydraulic transfer has been described, but in the case of a resin molded product having a complicated shape, the same problem arises when it is necessary to reduce the gloss of the clear coat layer on the surface. Arise.

  This invention is made | formed in view of said subject, The objective is to provide the matting method and the manufacturing method of a surface decorating product which can drop the glossiness of a clearcoat layer exactly. Another object of the present invention is to provide a surface decoration product having an appearance quality improved by accurately reducing the gloss of the clear coat layer.

  In order to solve the above-mentioned problem, in the invention according to claim 1, the clear coat layer formed on the surface of the resin molded body is subjected to wet blasting or blasting using a blasting material that can be vaporized at room temperature. The gist of the present invention is a matting method for removing the gloss of the clear coat layer.

According to the first aspect of the present invention, unevenness is formed on the surface of the clear coat layer by the wet blasting process or the blasting process using a blasting material that can be vaporized at room temperature, and the gloss of the surface is lowered. In these two types of blasting, unlike the drive blasting using a hard blasting material such as sand blasting or shot blasting, static electricity is not generated on the surface of the resin molding. Therefore, adhesion of dust or the like is prevented, and the appearance quality of the molded body surface can be kept good. Furthermore, since the unevenness | corrugation can be formed only in the surface side clearcoat layer, without damaging the back surface side, when the back surface of the resin molding is exposed, the gloss of a clearcoat layer can be dropped accurately.
Here, examples of the wet blasting process include an ice grain blasting process. Since the blasting material in this case is a grain of ice, it is much softer than the blasting material for sand blasting and the blasting material for shot blasting, and the impact given to the clear coat layer is also small. Examples of the blasting process using a blasting material that can be vaporized at room temperature include a dry ice blasting process (CO ₂ blasting process). Since the blasting material in this case is a grain of dry ice, it is much softer than the blasting material for sand blasting or the blasting material for shot blasting, and the impact given to the clear coat layer is also small.

  The invention according to claim 2 includes a step of forming a printed layer on the surface of the resin molded body, a step of applying a transparent clear paint for gloss, and forming a clear coat layer covering the printed layer, The gist of the method for producing a surface-decorated article is characterized by including a step of removing the gloss of the clear coat layer by performing wet blasting on the surface of the clear coat layer.

  According to the invention described in claim 2, the printed layer is formed on the surface of the resin molded body, and the clear coat layer for covering the printed layer is formed by applying the glossy transparent clear paint. . And an unevenness | corrugation is formed in the surface of a clearcoat layer by performing the wet blast process with respect to the surface of the clearcoat layer. In this wet blast treatment, soft processing can be performed, and irregularities can be formed on the clear coat layer so as not to reach the print layer. Therefore, the gloss of the clear coat layer can be accurately lowered without damaging the decoration.

  In addition, as a surface decoration product in this invention, an automotive component, a decorative component for houses, etc. can be mentioned.

  The gist of the invention described in claim 3 is that, in claim 2, the wet blasting process is an ice grain blasting process.

  According to a third aspect of the present invention, the wet blasting process is preferably an ice grain blasting process. The ice grains used in this ice grain blasting process are moderately hard to form irregularities on the surface of the clear coat layer, and after the treatment the ice grains melt and become water, so they remain on the surface of the clear coat layer. I don't have to. Further, in the ice particle blasting process, the surface of the clear coat layer can be washed with water in which the ice particles are dissolved. Thus, the glossiness of the clear coat layer can be accurately reduced by forming irregularities on the surface of the clear coat layer by the ice blast treatment.

  The gist of the invention of claim 4 is that, in claim 2 or 3, the resin molded body has a curved surface, and the printing layer is hydraulically transferred onto the curved surface.

  According to invention of Claim 4, a printing layer is hydraulically transferred on the curved surface of a resin molding, and a clearcoat layer is formed so that the printing layer may be covered. As described above, even when the clear coat layer is formed on the curved surface of the resin molded body, the gloss can be accurately reduced by forming irregularities on the clear coat layer by wet blasting.

  According to a fifth aspect of the present invention, there is provided a resin molded body, a printed layer formed on the surface of the resin molded body, and a matting agent formed so as to cover the printed layer and made of inorganic particles. A surface decoration product characterized by comprising a matte clear coat layer having fine irregularities formed on the surface thereof by wet blasting or blasting using a blasting material that can be vaporized at room temperature. The gist.

  According to the invention described in claim 5, the printing layer is formed on the surface of the resin molded body, and the matte clear coat layer is formed so as to cover the printing layer. The clear coat layer does not substantially contain a matting agent composed of inorganic particles, and has fine irregularities formed by wet blasting or blasting using a blasting material that can be vaporized at room temperature. In this surface decoration product, the gloss of the clear coat layer can be accurately reduced without damaging the decoration, and the appearance quality can be improved.

  As described above in detail, according to the inventions described in claims 1 to 4, it is possible to provide a matting method capable of accurately dropping the gloss of the clear coat layer and a method for producing a surface decoration product. According to the fifth aspect of the present invention, it is possible to provide a surface decoration product having an appearance quality improved by accurately reducing the gloss of the clear coat layer.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing a schematic configuration of a surface decorative article 1 in the present embodiment. This surface decoration 1 is an instrument panel used as an automobile part, for example.

  As shown in FIG. 1, the surface decoration 1 includes a resin molded body 2, a printed layer 3 formed on the surface of the resin molded body 2, and a clear coat formed so as to cover the printed layer 3. Layer 4.

  The printing layer 3 is produced by performing gravure printing on a water-soluble film (not shown), and decorates the surface of the molded body by being transferred onto the surface of the resin molded body 2 by hydraulic transfer. Examples of the pattern of the print layer 3 include a wood grain pattern and a geometric pattern.

  The clear coat layer 4 is a matte clear coat layer substantially free from a matting agent (for example, silica) made of inorganic particles and having fine irregularities 4a on the surface thereof. The unevenness 4a of the clear coat layer 4 in the present embodiment is formed by spraying sliver-shaped ice particles on the surface of the clear coat layer 4 by an ice particle blasting device (not shown). The size of the unevenness 4a in the clear coat layer 4 is adjusted so that the glossiness is 90% or less, preferably 10% to 50%.

  The ice blasting device is equipped with an injection gun for ejecting ice particles attached to the robot arm, and the robot arm is driven so that the spray direction and position of the ice particles can be changed according to the product shape. Yes. In the front surface decorative article 1 of the present embodiment, the printed layer 3 and the clear coat layer 4 are not formed on the back surface (the bottom surface in FIG. 1), and the back surface of the resin molded body 2 is exposed. Therefore, the ice particle blasting apparatus sprays ice particles only on the surface side clear coat layer 4 of the resin molded body 2 so as not to damage the exposed resin molded body 2.

  Next, the manufacturing method of the surface decoration 1 of this embodiment is demonstrated according to FIG.

  First, a resin molded body 2 molded into a predetermined shape using a resin material (for example, ABS resin) is prepared. Then, as shown in FIG. 2A, the printing layer 3 is hydraulically transferred onto the surface of the resin molded body 2. Here, a transfer film (for example, a water-soluble film mainly composed of polyvinyl alcohol) is floated on the water surface of a water tank of a transfer device (not shown), and the surface of the resin molded body 2 is pressed against the transfer film. At this time, a predetermined pattern printed on the transfer film is transferred onto the surface of the resin molded body 2 by water pressure.

  Then, the transfer film that has become unnecessary is washed with water and dried, and moisture and solvent adhering to the transfer are dried. Then, as shown in FIG. The clear coat layer 4 having a predetermined thickness (about 30 μm) is formed by applying the clear paint one or more times. As the transparent clear paint, for example, a two-component urethane paint (a two-component urethane resin paint in which a main agent and a curing agent are mixed and cured) is used.

  As shown in FIG. 2 (c), ice particles 6 are sprayed onto the surface of the clear coat layer 4 from an ice particle blasting device (not shown). As a result, as shown in FIG. 2D, fine irregularities 4a are formed on the surface of the clear coat layer 4, and the gloss of the clear coat layer 4 is lowered.

  As shown in FIG. 3, even when the resin molded body 2 has a curved surface, the printing layer 3 is hydraulically transferred onto the curved surface, and the clear coat layer 4 is formed so as to cover the printing layer 3. And by the ice particle 6 being sprayed according to the curved surface shape of the resin molding 2, the unevenness | corrugation 4a is formed in the surface of the clearcoat layer 4, and the glossiness of the clearcoat layer 4 is dropped.

  Therefore, according to the present embodiment, the following effects can be obtained.

  (1) In the present embodiment, soft processing can be performed by spraying the ice particles 6 by ice particle blasting, and the surface of the relatively soft clear coat layer 4 does not reach the printing layer 3. The unevenness 4a can be formed. Further, in this ice particle blasting treatment, static electricity is not generated on the surface of the resin molded body 2, so that dust or the like can be prevented from adhering to the surface, and further, the water of the ice particles 6 has been dissolved and water of the clear coat layer 4 is removed. The surface can also be cleaned. As described above, the gloss of the clear coat layer 4 can be accurately reduced by forming the irregularities 4a on the surface of the clear coat layer 4 by the ice particle blasting process.

  (2) As shown in FIG. 3, even if the resin molded body 2 has a complicated shape having a curved surface, the ice particle blasting device controls the spraying direction of the ice particles 6 so that the clear coat layer 4 The unevenness 4a can be formed on the surface, and the gloss of the clear coat layer 4 can be accurately removed.

  (3) In the case of the present embodiment, the gloss of the clear coat layer 4 can be reduced by controlling the spraying position of the ice particles 6 by the ice particle blasting device. When partially matting in this way, the conventional technology requires two types of clear paints (glossy and non-glossy clear paints), whereas in this embodiment only glossy clear paints are used. And the productivity of the surface decorative article 1 can be increased. Since the glossy clear paint does not substantially contain a matting agent such as silica, the matte quality can be easily controlled. Specifically, in the ice particle blasting apparatus, the size of the unevenness 4a in the clear coat layer 4 can be adjusted by controlling the size of the ice particles 6, the spraying time of the ice particles 6, and the like. The gloss of 4 can be accurately removed.

  (4) After the ice blast treatment, the ice spheres 6 melt and become water, so there is an impact on the environment compared to the case of using the hard blast material (sand grains or steel grains) shown in the prior art. Absent. Further, by using the ice particles 6 as the blast material, there is no need to collect the blast material, and the running cost of the blast device can be reduced.

  In addition, you may change embodiment of this invention as follows.

  -In the above-mentioned embodiment, although it embodyed in surface decoration 1 which adds decoration to the surface of resin fabrication object 2 by water pressure transfer, it is not limited to this. As shown in FIG. 4, a resin molded product 11 in which the clear coat layer 13 is directly formed on the surface of the resin molded body 12 may be embodied. Also in the resin molded product 11, the gloss of the clear coat layer 13 can be accurately reduced by performing the ice particle blasting process on the clear coat layer 13.

  -In the surface decoration 1 of the said embodiment, although the printing layer 3 was formed by hydraulic transfer, you may form the printing layer 3 by other methods, for example, screen printing.

  In the above embodiment, the two-component urethane paint is used as the clear paint, but a one-component urethane paint may be used. Of course, a clear paint such as an acrylic paint may be used in addition to the urethane paint.

  -In the said embodiment, although decoration was added to the surface of the resin molding 2 which consists of ABS resin, decoration on the surface of resin moldings, such as an acrylic resin, a polypropylene resin, a vinyl chloride resin other than ABS resin, was carried out. May be added.

In the above embodiment, the surface of the surface is formed by performing ice blasting, which is a kind of wet blasting process. For example, the surface of the surface is formed by performing dry ice blasting using a dry ice blasting apparatus. May be. The blasting material in this treatment is dry ice particles, and has an appropriate hardness to form the unevenness 4a on the surface of the clear coat layer 4. Further, since the dry ice particles are vaporized at room temperature (sublimation) after the treatment, they do not remain on the surface of the clear coat layer 4.
Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the embodiment described above are listed below.

  (1) A matte method for removing the gloss of the clear coat layer by performing wet blast treatment or blast treatment using a blast material that can be vaporized at room temperature on the surface of the clear coat layer that protects the printing layer.

  (2) The method for producing a surface decorative article according to any one of claims 2 to 4, wherein the resin molded body has a back surface exposed.

  (3) The method for producing a surface-decorated article according to any one of claims 2 to 4, wherein the unevenness does not reach the printed layer.

  (4) The method for producing a surface decoration product according to any one of claims 2 to 4, wherein the surface decoration product is an automobile part.

  (5) The surface decorative article according to claim 5, wherein the matte clear coat layer has a glossiness of 10% to 50%.

Sectional drawing which shows the surface decorating product of one Embodiment which actualized this invention. (A)-(d) is explanatory drawing which shows the manufacturing method of the surface decorating article of FIG. Sectional drawing which shows the surface decorations which have a curved surface. Sectional drawing which shows the resin molded product of another embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Surface decoration 2 ... Resin molded object 3 ... Printed layer 4 ... Clear coat layer 4a ... Concavity and convexity 6 ... Ice grain 12 ... Resin molded object 13 ... Clear coat layer

Claims (5)

  A matte method for reducing the gloss of the clear coat layer by performing wet blast treatment or blast treatment using a blast material that can be vaporized at room temperature on the clear coat layer formed on the surface of the resin molded body. Forming a printed layer on the surface of the resin molded body;
Applying a clear clear paint for gloss and forming a clear coat layer covering the printed layer; and
And a step of removing the gloss of the clear coat layer by performing wet blasting on the surface of the clear coat layer.   The method for producing a surface-decorated article according to claim 2, wherein the wet blasting process is an ice grain blasting process.   The method for producing a surface decorative article according to claim 2 or 3, wherein the resin molded body has a curved surface, and the printing layer is hydraulically transferred onto the curved surface. A resin molded body;
A printed layer formed on the surface of the resin molded body;
The surface is formed with fine irregularities formed by blasting using a blasting material which is formed so as to cover the printing layer and substantially does not contain a matting agent composed of inorganic particles and which can be vaporized at room temperature. A surface decoration product comprising a matte clear coat layer.

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