JPS63310676A - Method for decorating hard base material - Google Patents

Abstract

PURPOSE:To remarkably improve the three-dimensional feeling of a rugged pattern by coating a primer on the rugged pattern of a specified shape by a curtain flow coater, removing the primer on the top surface of the protrusion, then spray-coating a top coat, and drying and curing the top coat. CONSTITUTION:The rugged pattern 3 having the horizontal top surface 4 of the protrusion and bottom surface 5 of the recess and having the sidewall 6 consisting of the sidewall 6a vertical to the top surface 4 of the protrusion and the sidewall 6b inclined by an angle of >=90 deg. is formed on the decorative surface 2 of the hard base material 1. The primer 7a is then coated on the rugged pattern 3 by a curtain flow coater, the uncured primer 7a on the top surface 4 of the protrusion is removed, and the top coat 8a is then spray-coated, dried, and cured to impart a contrast due to the primer 7a on the bottom surface 5 of the recess and sidewall 6. As a result, the three-dimensional feeling of the rugged pattern 3 can be remarkably improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cosmetic method in which an uneven pattern is formed on the decorative surface of a hard base material, and this uneven pattern is coated.

[Conventional technology]

Conventionally, decorative methods such as painting and printing have been used to add design to hard substrates such as thin metal plates and synthetic resin plates. However, in this case, it was not possible to eliminate the smoothness of the hard base material. In addition, attempts are being made to create three-dimensional windows by applying uneven patterns to hard substrates by embossing, etching, etc. However, the height of the uneven pattern is limited by the material of the hard substrate, and the uneven pattern cannot be seen at all due to the relationship with the light beam.For this reason, after printing on the hard substrate, embossing is applied to the uneven pattern. Patterns have also been applied.However, in this case, the printed pattern and the uneven pattern were independent of each other, and it was not possible to take full advantage of each other's strengths.

[Purpose of the invention]

In order to eliminate such drawbacks, the present invention aims to make the top surface of the convex part and the bottom surface of the concave part horizontal when applying a concavo-convex pattern by embossing, etching, etc., and the side wall has a vertical part and an inclined part. An undercoat is applied to this uneven pattern surface using a curtain flow coater, and then only the undercoat present on the top surface of the convex portions is removed, and then a topcoat is spray applied, which is dried and cured. This paper proposes a cosmetic method that can significantly improve the three-dimensional effect of an uneven pattern by adding contrast with an undercoat paint on the bottom surface of the recess and the side walls.

〔Example〕

The method for decorating a hard substrate according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a conceptual diagram of the process, and numeral 1 indicates a hard base material, such as a thin metal plate (color steel plate, copper plate, aluminum plate, etc.), gypsum board, slate board, inorganic board, synthetic resin board, etc. A is a concavo-convex processing step, which is a step of forming a concavo-convex pattern on the decorative surface 2 of the hard base material 1 by embossing, etching, pressing, etc. as shown in FIG. 2 fat. To explain further, this uneven pattern is created by making the top surface 4 of the convex part and the bottom surface 5 of the concave part horizontal, and the side wall 6 is set at θ1=9 with respect to the top surface 4 of the convex part, as shown in FIG. 2(a).
0″, 0g with respect to the so-called vertical side wall 6a and the top surface 4 of the convex part
The shape is made of a side wall 6b inclined at an angle of >90'. The main depth of the concavo-convex pattern is about 0.1 to 4u, the size is arbitrary, and the shape of the top surface 4 of the convex portion and the bottom surface of the concave portion 5 is also arbitrary.

In addition, θ2 of the inclined side wall 6b is not uniform, and 0g>9
0".B is the step of applying the undercoat paint 7a to the decorative surface 2 of the hard substrate 1 to form the undercoat layer 7, and is a step performed by a curtain flow coater. The undercoat 7a includes, for example, acrylic resin, polyurethane resin, epoxy resin, melamine resin, alkyd resin,
Polyester resin, furan resin, vinyl resin, urea resin, maleic acid resin, styrene resin, phenolic resin, oil-free polyester, styrenated alkyphide resin,
It is a room temperature curing type, heating, heat curing type paint, or ultraviolet curing type paint that uses aluminum paint, chilimen enamel, vinyl copolymer, polyvinyl butyral, ethyl cellulose, etc., and various pigments are added thereto, and has a viscosity of approx. 2
It is about 0 to 2000 centipoise. To explain further, this undercoat coating step B is carried out using a curtain flow coater while keeping the hard base material 1 horizontal as shown in FIG. 2(b). Therefore, in the uneven pattern, the undercoat N7 is formed on the top surface 4 of the convex portion, the bottom surface 5 of the concave portion, and the inclined side wall 6b portion, but is not applied on the vertical side wall 6a portion.

C is a wiping step, in which the top surface 4 of the convex portion is removed via the roller R as shown in FIG.
This is a step of removing the undercoat paint 7a on top. D is a top coat application process in which the top coat 8a is applied to the entire decorative surface 2 by spraying.Since it is performed by spraying, the top coat is applied to the entire surface including the vertical side walls 6a which were not coated in the undercoat application process B. This is the step of forming layer 8. The top coat 8a is mainly a clear paint, but metallic, varnish, enamel paint, etc. may also be used. E is the paint layer curing process, which uses a gas burner, an infrared heater, a far-infrared heater,
This is done using high frequency waves or ultraviolet lamps. As shown in Figure 2 (d+), the hard base material 1 coated through such a process has an uneven appearance that differs depending on the viewing angle because the undercoat layer 7 is not present on the vertical side wall 6a. Furthermore, due to the contrast between the top surface 4 of the convex portion and the bottom surface 5 of the concave portion, the uneven pattern 1 is emphasized, giving a three-dimensional effect.
The design quality is improved.

What has been described above is only one embodiment of the hard base material cosmetic method according to the present invention, and as shown by the dashed line in FIG. It is also possible to provide a preliminary curing step F and apply the top coat 8a after the undercoat layer 7 is cured to some extent.

In this case, even if the top coat 8a is applied by spraying under high pressure, it will not mix with the base coat 7a, which is preferable. Further, in FIG. 1, the steps A to curing the paint layer are shown as a continuous process, but it is also possible to separate the step A. Further, a molding step can be provided after the paint layer curing step E to form a construction panel or the like. Further, although the hard base material l is usually in the shape of a band, it is also possible to use one formed into a cut plate shape or a panel shape.

〔Effect of the invention〕

As mentioned above, according to the method for decorating hard substrates according to the present invention, ■Contrast between the coating surface with an uneven pattern formed by means such as embossing and the paint (lower and upper), and a mutual effect between colors; This promotes a three-dimensional effect. ■Since the undercoat is not present on the vertical side walls, the hard base material has a different appearance depending on the viewing angle, greatly improving the design. ■Since painting is performed on the hard base material after forming the uneven pattern, the weather resistance of the hard base material is improved. It has the following effects and characteristics.

[Brief explanation of drawings]

FIG. 1 is a process diagram for explaining the hard base material makeup method according to the present invention, and FIGS. 2(a) to 2(d) are explanatory diagrams for explaining each process. A...Irregularity processing process, B...Undercoat paint application process,
C... Wiping process, D... Top coat application process,
E...Paint layer curing step, 1...Hard base material, 3s...
Uneven pattern, 6...side wall. Figure 1 E, 4 flA klA and x- in Figure 2 (Den)

Claims (1)

[Claims] (1) In a cosmetic method in which a concave-convex pattern is provided on the decorative surface of a hard base material and then painted, the top surface of the convex part and the bottom surface of the concave part of the concave-convex pattern are made horizontal, and the side wall between the top surface of the convex part and the bottom surface of the concave part is made convex. The top surface of the part is formed so that it has a perpendicular part and a slope part, and an undercoat is applied to the uneven pattern using a curtain flow coater, and then, when the undercoat is in an uncured state, a base coat is applied to the top surface of the convex part. A method for making up hard substrates, which is characterized by removing an existing undercoat, then applying a topcoat by spraying, drying and curing.