JPH0520525Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Field of Application>> The present invention relates to a synthetic resin product having a partially matte metal layer formed thereon.

《Prior art》 Hot stamping or printing can be used to decorate the surface of synthetic resin products on which a metal layer has been formed, such as by vacuum evaporation. Not only is it difficult to decorate the matte portion, which has a textured appearance, at the same time, but even if it is decorated after vapor deposition, it is not possible to create a clear contrast. In addition, those with surface decorations lack depth in appearance and have very low surface strength.

For this reason, it is possible to partially roughen the inner surface of the mold by sandblasting, texturing, electrical discharge treatment, etc., and then vacuum-evaporate the product molded using this mold. When painted, the matte feel is lost, resulting in a product with poor contrast. Furthermore, the machined surface of the mold is usually slightly concave and does not rise, making it impossible to obtain a three-dimensional effect.

《Problems to be solved by the invention》 This invention was devised in view of the above-mentioned problems, and its purpose is to create a material that has a beautiful matte feel in some areas, has high surface strength, and has a three-dimensional matte appearance. To provide a synthetic resin product on which a metal layer with a textured feel is formed.

《Means for solving the problem》 In order to achieve the above-mentioned purpose, the synthetic resin product of the present invention with a partially matte metal layer formed is made of ABS resin, AS resin, PP resin, Apply 5wt% to 35wt of matting agent with a particle size of 1 to 10μ on the basic surface of synthetic resin products such as urea and phenolic resin.
The printing layer is partially printed using a screen plate with acrylic, epoxy, urethane, polyester, vinyl, rubber, melamine, alkyd, etc. printing ink containing 3% compounded urethane resin, epoxy resin, etc. An undercoat layer using thermosetting paint such as resin, vinyl resin or acrylic, acrylic modified paint such as polyester acrylic, urethane acrylic, or epoxy acrylic, or UV curing paint such as epoxy resin, and aluminum or gold. , vacuum deposition of chromium, hot stamping, sputtering, in-oplating,
A metal layer is formed by spray plating, etc., and a top coat layer is formed using a heat-drying paint such as urethane resin, epoxy resin, vinyl resin, or acrylic resin, and is cured by being irradiated with ultraviolet rays, electron beams, or radiation. It is formed by sequentially laminating a cured layer using a coating material.

<<Embodiments>> Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 indicates a base made of synthetic resin, which is generally made of ABS resin, AS resin, PP (polypropylene) resin, urea resin, phenol resin, etc.

In the present invention, a printing layer 2 is formed on the surface of the synthetic resin substrate 1 by partially printing printing ink containing a matting agent by screen printing. There are two types of matting agents: organic matting agents and inorganic matting agents.As organic matting agents, cross-linking agents such as cross-linked polystyrene, cross-linked polyethylene, and cross-linked acrylic, or beads or powder of phenolic resin are used. be done. Further, as the inorganic matting agent, powders of silica, calcium carbonate, precipitated barium chloride, etc. are used. The grain size of the above matting agent should be within the range of 1 to 10 μm. If it is less than this range, it will not be possible to produce a matte feeling, while if it exceeds this range, beautiful printing will not be achieved during screen printing using a fine mesh. cannot be administered. In addition, the content of the above-mentioned matting agent in the printing ink is set at 5wt% to 35wt%; if it is less than this range, it will not be possible to express a matte feeling, and if it exceeds this range, dispersion will be poor and pine unevenness will occur.
In addition, the adhesion with the substrate 1 and the undercoat layer described below decreases. In particular, in the case of an inorganic matting agent, if it exceeds the above range, the expansion rate will be significantly different from that of the ink, which may cause cracks on the printed surface when drying.

By selecting a printing ink that has good adhesion to the resin substrate 1, acrylic, epoxy, urethane, polyester, vinyl,
Rubber-based, melamine-based, and alkyd-based printing inks are preferred.

The most preferable among the above matting agents is crosslinked polystyrene beads with a particle size of about 6μ, and by setting the content to about 25wt% in the printing ink,
Maximum 35wt even with fine screen mesh
%.

In the present invention, beautiful screen printing can be performed on the substrate 1 by using an ink containing a matting agent within the above range, but various matt effects can be reproduced by changing the screen mesh. can. In other words, printing with a fine mesh gives a whitish matte feel, and printing with a coarse mesh gives a matte feel with a sparkling, pearlescent luster.

In the present invention, an undercoat layer 3 is formed by coating on the surface of the substrate 1 on which the partially printed layer 2 has been applied as described above. This undercoat layer is applied to protect the substrate 1 and the printing layer 2 and to improve the adhesion of metal layers by vacuum deposition, etc., which will be described later. Alternatively, a thermosetting or ultraviolet curing paint such as acrylic resin is used. As UV-curable paints, acrylic modified polyester acrylics, urethane acrylics, epoxy acrylics, and epoxy resins are used. Incidentally, an ultraviolet curable coating material is preferable because it takes a shorter curing time and has a higher surface hardness than a thermosetting coating material.

A metal layer 4 is further formed on the upper surface of the undercoat layer 3 described above. This metal layer 4 is aluminum,
It is formed by vacuum evaporation of gold, chromium, etc., hot stamping, sputtering, ion plating, spray plating, etc., but in any case, uniform adhesion with the undercoat layer 3 is required, and vacuum evaporation Formation of metal layer 4 is most preferred. When the metal layer 4 is applied in this way, the portion of the metal layer closely stacked on the printed layer 2 using the matting agent has a matte matte feel,
A clear contrast is obtained with the parts of the metal layer which are not stacked on top of the printed layer 2.

Furthermore, in the present invention, a top coat layer 5 is formed on the metal layer 4 using a heat-drying paint such as urethane, epoxy, vinyl, or acrylic. This top coat layer 5 is for adhering to and covering the metal layer 4, but since it itself does not have sufficient hardness, a hardened layer 6 is further formed on top coat layer 5. As this hardened layer 6, a paint similar to that described above is used, which is hardened by being irradiated with ultraviolet rays, electron beams, or radiation.

Experimental example After screen printing onto an ABS resin molded product using acrylic ink containing 25% cross-linked polystyrene beads with a particle size of 6μ as an organic matting agent,
In a synthetic resin product in which an undercoat layer is formed with a urethane resin, and then a top coat layer and a hardened layer are formed on the undercoat layer, the metal layer on the printed layer 2 partially applied on the substrate 1 is used. Only the layer 4 part had a matte, matte metallic tone and was beautifully revealed. The principle behind the beautiful appearance of the metallic matte feeling is that this matting agent has a uniform and very fine spherical shape, and is organic resin beads that have very good dispersibility in the ink. This is because the surface has a large bulge, and the difference in gloss of the metal vapor deposited layer becomes large between the printed part and the non-printed part.

<<Effect>> As described above, in the synthetic resin product according to the present invention, printing ink containing 5 wt% to 35 wt% of a matting agent is printed on the synthetic resin substrate 1 and then vacuum evaporated via an undercoat layer. Because the metal layer is formed by the above-mentioned metal layer, the metal layer stacked on the printed area can have a clear matte feel, creating a great contrast with other shiny metal layers. . In particular, in the present invention, since the printing ink can be applied by screen printing, extremely complex patterns such as pine and other patterns can be produced. Furthermore, in the synthetic resin product of the present invention, the screen-printed area is raised relatively larger than other areas due to the matting agent, creating a pine pattern with a three-dimensional and deep feel. be able to. Further, since the printing layer of the present invention is directly formed on the synthetic resin substrate 1, and the upper part is protected by a top coat layer and a hardening layer, a matte pattern with excellent surface strength can be produced.

[Brief explanation of the drawing]

The figure is a sectional view of a synthetic resin product having a partially matte metal layer according to the present invention. DESCRIPTION OF SYMBOLS 1...Substrate, 2...Printing layer, 3...Undercoat layer, 4...Metal layer, 5...Top coat layer,
6...Hardened layer.

Claims (1)

[Scope of utility model registration request] 5wt% to 35wt% of a matting agent with a particle size of 1 to 10μ is applied to the basic surface of synthetic resin products such as ABS resin, AS resin, PP resin, urea, and phenol resin.
Contains acrylic, epoxy, urethane,
Printing layer partially printed with polyester, vinyl, rubber, melamine, alkyd, etc. printing ink using a screen plate, and thermosetting resin such as urethane resin, epoxy resin, vinyl resin, or acrylic resin. An undercoat layer using a mold or an ultraviolet curing paint such as polyester acrylic, urethane acrylic, or epoxy acrylic, or an epoxy resin, and vacuum deposition, hot stamping, sputtering, etc. of aluminum, gold, chromium, etc. ion plating,
A metal layer is formed by spray plating, etc., and a top coat layer is formed using a heat-drying paint such as urethane resin, epoxy resin, vinyl resin, or acrylic resin, and is cured by being irradiated with ultraviolet rays, electron beams, or radiation. A synthetic resin product that has a partially matte metal layer formed by sequentially laminating a hardened layer using a paint that has a matte finish.