JP2013146864A - Decorative resin molding and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative resin molding which has high metallic luster and metal texture using a printing technique, and is excellent in rigidity and strength.SOLUTION: In a decorative resin molding 10, a plated layer 2, a base coat layer 3, a decorative layer 4, and a top coat layer 5 are sequentially formed on a resin substrate 1. The decorative layer 4 is formed by transferring a pattern printed in the film with a hydraulic transfer method. The high rigidity and high strength are obtained by forming the plated layer 2 on the resin substrate 1. The metallic luster and metal texture are imparted to the transferred pattern by forming the decorative layer 4 on the upper side above the plated layer 2 with the hydraulic transfer method.

Description

  The present invention relates to a decorative resin molded product having a decorative layer formed on the surface, and a method for producing the same.

Conventionally, a metallic coating film or a plating film by metal plating is formed on a substrate made of a resin molded product, or a metal thin film is formed by physical vapor deposition or chemical vapor deposition such as sputtering. A decorative resin molded product that has been decorated is known (for example, Patent Document 1).
On the other hand, a decorative resin molded product in which a decorative layer is formed on a design surface of a resin base material or a surface of a base coat layer formed on the design surface by a hydraulic transfer method is known (for example, Patent Document 2).

JP 2009-061750 A JP 2003-300247 A

A printing technique such as a hydraulic transfer method is a technique for transferring a design such as a wood grain or an abstract pattern printed on a film to a design surface of a resin base material or a surface of a base coat layer as a base layer. By using this printing technique, various patterns such as a wood grain pattern and an abstract pattern can be added to the resin molded product. In addition, the hydraulic transfer method is particularly suitable for application to a small variety of products.
However, it is difficult to achieve high metallic luster and metallic texture with printing technology. Moreover, there exists a problem that high rigidity and high intensity | strength like a metal cannot be obtained.

  The present invention was created in view of the above points, and its purpose is to use a printing technique to provide a decorative resin molding having a high metallic luster and a metallic texture, and having excellent rigidity and strength. Is to provide goods.

  The decorative resin molded product of the present invention was formed on a resin base material, a plating layer formed on the resin base material, a base coat layer formed on the plating layer, and a base coat layer, and printed on a film. A decorative layer in which the handle is transferred by a hydraulic transfer method and a top coat layer formed on the decorative layer are provided.

  The plating layer formed on the resin substrate generally includes a copper plating layer as a base layer, a nickel plating layer as an intermediate layer, and a chromium plating layer as a surface layer. High rigidity and high strength can be obtained by forming the plating layer on the resin base material. Moreover, a metallic luster and a metal texture can be provided to the transferred pattern by forming the decorative layer above the plating layer by a hydraulic transfer method.

  Moreover, the adhesive force of a plating layer and a decoration layer is securable by forming a decoration layer via a basecoat layer on a plating layer.

The present invention also provides a method for producing a decorated resin molded product.
This manufacturing method includes (1) a step of forming a resin base material, (2) a step of forming a plating layer on the resin base material, (3) a step of forming a base coat layer on the plating layer, and (4 ) A step of transferring the pattern printed on the film on the base coat layer by a hydraulic transfer method to form a decorative layer; and (5) a step of forming a top coat layer on the decorative layer.
By such a method, there exists an effect similar to the invention which concerns on said decorative resin molded product.

It is a notch expanded sectional view of the decorative resin molded product by one Embodiment of this invention. It is explanatory drawing of the hydraulic transfer process for forming the decorating layer by one Embodiment of this invention. It is a notch expanded sectional view of the decorative resin molded product of a 1st comparative example. It is a notch expanded sectional view of the decorative resin molded product of the 2nd comparative example. It is explanatory drawing of the in-mold shaping | molding process used for manufacture of a 2nd comparative example.

(One embodiment)
A decorative resin molded product according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. This decorative resin molded product is used, for example, as an interior part of an automobile.
As shown in FIG. 1, in a decorative resin molded product 10, a plating layer 2, a base coat layer 3, a decorative layer 4, and a top coat layer 5 are formed on a resin base material 1 in order.

  The resin base material 1 is formed by injection molding, for example, ABS (acrylonitrile-butadiene-styrene) resin, PC (polycarbonate) -ABS resin, or the like. ABS or PC-ABS is an amorphous plastic and is characterized by high impact strength and good surface gloss. ABS and PC-ABS are widely used for interior and exterior parts such as automobile radiator grills and instrument panels.

The plating layer 2 is generally formed by a plating process applied to an ABS resin, and by electroplating after pretreatment, the base layer is a copper plating layer, the intermediate layer is a nickel plating layer, and the surface layer is a chromium plating layer. Are sequentially formed.
The base coat layer 3 is a coating film applied as a base layer of the decorative layer 4 and ensures adhesion between the plating surface of the plating layer 2 and the decorative layer 4.
The decorative layer 4 is transferred with a wood grain pattern or an abstract pattern printed on the film by using a hydraulic transfer method which is one of printing techniques.
The top coat layer 5 is a transparent coating film (clear coat), and is formed as a protective layer for the decorative layer 4.

Next, steps (a) to (e) of the hydraulic transfer method will be described with reference to FIG.
(A) A floating solvent 83 is applied to the film 40 on which the pattern is printed on the water 82 put in the water tank 81. On the other hand, the primary intermediate product 8 in which the plating layer 2 is formed on the resin base material 1 and the base coat layer 3 is formed on the plating layer 2 is prepared.
(B) The design surface of the primary intermediate product 8 is pressed against the film 40 coated with the solvent 83 to transfer the pattern of the film 40.

(C) A shower 84 is passed through the secondary intermediate product 9 on which the decorative layer 9 is formed, and the surface is washed.
(D) The secondary intermediate product 9 is placed in a drying furnace and dried, and then sprayed with a spray 85 such as a clear paint.
(E) The secondary intermediate product 9 to which the clear paint is applied is placed in a drying furnace or the like and subjected to a baking treatment, thereby forming a top coat layer 5 by a clear coat. Thereby, the decorative resin molded product 10 is completed.

The manufacturing process of the decorative resin molded product 10 of this embodiment is shown as follows.
(1) A step of forming the resin base material 1 by injection molding,
(2) The process of forming the plating layer 2 on the resin base material 1,
(3) forming a base coat layer 3 on the plating layer 2 to form a primary intermediate product 8;
(4) forming a decorative layer 4 on the primary intermediate product 8 by a hydraulic transfer method to form a secondary intermediate product 9;
(5) A step of forming the topcoat layer 5 on the decorative layer 4.

The feature of the decorative resin molded product of the present embodiment having the above configuration will be described in comparison with a comparative example.
As shown in FIG. 3, the decorative resin molded product 18 of the first comparative example is formed directly on the resin substrate 1 or via the base coat layer without forming a plating layer on the resin substrate 1. The decorative layer 4 is formed by a hydraulic transfer method.

In the first comparative example, the wood grain pattern and the abstract pattern printed on the film can be transferred onto the resin substrate 1 by hydraulic transfer, but it is difficult to impart a metallic luster and a metallic texture. Further, high rigidity and high strength cannot be obtained.
On the other hand, in this embodiment, high rigidity and high strength are obtained by forming the plating layer 2 on the resin base material 1. Further, by forming the decorative layer 4 on the upper side of the plating layer 2 by a hydraulic transfer method, it is possible to impart a metallic luster or a metallic texture to the transferred pattern.

Specifically, Table 1 shows physical property values before and after plating when the resin substrate 1 is an ABS resin. “Before plating” corresponds to the first comparative example, and “after plating” corresponds to one embodiment of the present invention. The physical property values in Table 1 are provided by the resin material manufacturer, and the measurement method of the physical property values conforms to ASTM (American Society for Testing and Materials) standards.
From Table 1, the tensile strength after plating is about 1.1 times the tensile strength before plating, and the bending strength after plating is about 1.5 times the bending strength before plating. I understand.

  Next, as a second comparative example, a decorative resin molded product using an in-mold molding method is shown in FIG. As shown in FIG. 4, the decorative resin molded product 19 of the second comparative example forms a layer of the film 45 on the resin substrate 1 by an in-mold molding method. The in-mold molding method is a technology classified as one of the printing technologies, like the hydraulic transfer method.

With reference to FIG. 5, the steps (a) to (c) of the in-mold molding method will be described.
(A) The film 45 is set between the fixed mold 91 and the movable mold 92 of the resin mold, and preliminarily molded while evacuating (arrow Vc) from the movable mold 92 side. Adhere to the surface.
(B) Immediately thereafter, a resin material is injected from the gate of the fixed mold 91, and the resin base material 1 and the film 40 are integrally formed. At the time of mold opening, the film 45 is trimmed around the product portion (illustrated by a triangle Tr). Alternatively, trimming may be performed in a later process instead of in-mold trimming.
(C) In this way, a decorative resin molded product 19 in which the film 45 is laminated on the resin substrate 1 is obtained.

In the in-mold molding method, a metal vapor deposition layer can be formed by using a metal vapor deposited film 45. However, with this method, even if a pseudo metal surface is obtained to some extent, it is not possible to obtain a metal texture rich in real feeling as in this embodiment.
On the other hand, this embodiment is characterized in that the plating layer 2 is formed between the resin substrate 1 and the decorative layer 4. Thereby, the solution subject of this invention of having a high metallic luster and a metallic texture, and providing the decorative resin molded product excellent in rigidity and intensity | strength can be achieved.

  As mentioned above, this invention is not limited to such embodiment, In the range which does not deviate from the meaning of invention, it can implement with a various form.

1 ... resin base material,
2 ... plating layer,
3 ... base coat layer,
4 ... decoration layer,
5 ... top coat layer,
10: Decorated resin molded product.

Claims (2)

A resin substrate (1);
A plating layer (2) formed on the resin substrate;
A base coat layer (3) formed on the plating layer;
A decorative layer (4) formed on the base coat layer and transferred onto the film by a hydraulic transfer method;
A topcoat layer (5) formed on the decorative layer;
A decorative resin molded product (10) comprising: Forming a resin substrate;
Forming a plating layer on the resin substrate;
Forming a base coat layer on the plating layer;
On the base coat layer, a pattern printed on the film is transferred by a hydraulic transfer method to form a decorative layer;
Forming a topcoat layer on the decorative layer;
The manufacturing method of the decorative resin molded product characterized by including.

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