JPH04339838A - Resin molding - Google Patents

Abstract

PURPOSE:To provide a resin molding which can be produced at a low cost by a method in which the surface-covering treatment of a fiber-reinforced resin can be conducted efficiently. CONSTITUTION:A primer layer is formed from, for example, an acrylic resin on a base consisting of a fiber-reinforced resin in which fibers, e.g. glass fibers, have been incorporated, such as a sheet molding compound(SMC) or a fiber- reinforced plastics(FRP). The primer layer is coated with a coating composition which contains glass fibers as a filler and is, for example, of the acrylic-urethane type, thereby to form a coating layer. Thus, glass fibers exposed on the surface of the base are covered.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin molded product used, for example, as a tractor cabin.

0002

2. Description of the Related Art Conventionally, the base material constituting the cabin of a tractor is made of so-called fiber reinforced plastic (FRP). This FRP is, for example, a composite material in which glass fiber is blended with a thermosetting resin, and examples of the thermosetting resin include unsaturated polyester resin, epoxy resin, and the like.

As shown in FIG. 4, on the surface of the base material 11 made of FRP, glass fibers 1 having a length of about 100 μm or less are coated.
2 has come out and is in a rough state, so the leather 13 is pasted on the base material 11. That is, this base material 11
After applying an adhesive to the surface of the base material 11, the leather 13 is placed and pressed, thereby adhering the leather 13 to the surface of the base material 11, as shown in FIG.

0004

However, in the above structure, it is necessary to apply an adhesive to the entire surface of the base material 11 to attach the leather 13. In that case, there was a problem in that it was not easy to attach the leather 13 to the corners and uneven parts of the base material 11, and therefore the workability was poor. Furthermore, since the laser 13 is used, there is also a problem that the manufacturing cost increases.

The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a resin molded product that has good workability when coating the surface of fiber-reinforced resin and reduces manufacturing costs. Our goal is to provide the following.

[0006]

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a primer layer is provided on a base material made of fiber reinforced resin, and a coating layer containing a filler is provided on the primer layer. The gist of the product is a resin molded product that covers fibers coming out from the surface of the base material.

[0007]

[Function] Since the coating layer contains filler and has a predetermined thickness, the coating layer can cover up the fibers exposed on the surface of the fiber-reinforced resin, and the coating layer also has a predetermined thickness. The primer layer adheres to the fiber-reinforced resin.

[0008]

[Embodiment] An embodiment embodying the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a sectional view showing a coating layer 3 formed on the surface of a base material 1 constituting a tractor cabin as a resin molded product via a primer layer 2, and FIG. 2 is an enlarged sectional view of FIG. 1. be. As shown in both figures, the resin constituting the base material 1 is the above-mentioned FRP, glass fiber is used as the reinforcing fiber, and polyester resin is used as the thermosetting resin. The glass fibers 4 are fluffed on the surface of the base material 1. The length of the glass fiber 4 protruding from this surface ranges from 100 μm or less to 3
mm (however, if it is 100 μm or more, sanding is performed as necessary to reduce it to 100 μm or less).

[0009] On this base material 1, a primer layer 2 having a thickness of about 10 μm is provided. The primer for forming the primer layer 2 is a mixture of acrylic resin dissolved in thinner. Note that urethane resin or the like may be used instead of this acrylic resin. On this primer layer 2, a coating layer 3 having a thickness of about 100 to 200 μm is provided. The paint for forming this coating layer 3 is:
This is a mixture of acrylic-urethane resin paint and polyamide pile as a filler. Examples of the pile type and blending ratio are as follows. ■A black product containing 9% by weight of black pile (thickness 1.5 denier, length 0.4 mm). ■Beige pile (thickness 1.5 denier, length 0.
For colored articles, etc., it contains 8.7% by weight of black pile (thickness: 1.5 denier, length: 0.4 mm), 0.3% by weight, for a total of 9.0% by weight.

Note that instead of the acrylic-urethane resin paint, an acrylic resin or urethane resin paint may be used. The blending ratio of the polyamide pile is preferably in the range of 6 to 10% by weight. If it is less than 6% by weight, the thickness of the coating layer 3 tends to become thin, and if it exceeds 10% by weight, the surface of the coating layer 3 tends to become rough.

As mentioned above, the primer layer 2 is formed on the base material 1.
This is used to ensure adhesion between the coating layer 3 and the coating layer 3. In addition, since the coating layer 3 contains polyamide pile, its thickness is increased, and as a result, the base material 1
The glass fibers 4 protruding from the surface can be surely covered. Next, a method for forming the primer layer 2 and the coating layer 3 on the surface of the base material 1 will be explained.

First, the primer layer 2 is applied by spraying the primer onto the base material 1 with a spray gun,
Formed by drying at ℃ for 30 minutes. Next, after spraying the paint with a spray gun,
A coating layer 3 is formed on the primer layer 2 by drying at 50 to 80°C for 40 to 60 minutes. This coating layer 3
contains the pile, so a thickness of 100 to 200 μm can be obtained by one spray coating.

As described above, since the glass fibers 4 fluffing from the surface of the FRP base material 11 are 100 μm or less, the coating layer 3 can completely cover the glass fibers 4. When the pile ■ is used, the coating layer 3 becomes black, and when the pile ■ is used, the coating layer 3 becomes beige. Therefore, the appearance of the tractor cabin is maintained well. Moreover, since the coating is sprayed with a spray gun, even the uneven parts and corners of the surface of the base material 1 can be easily coated. Further, by changing the color of the pile, a desired color tone such as blue or red can be easily set.

As described above, in this embodiment, when coating the surface of the base material 1 made of FRP, the primer layer 2 is formed by spraying a primer, and then the paint is spray-painted. Therefore, the coating layer 3 can be easily formed even on the corners and uneven parts of the base material 1, and therefore, the workability is excellent. In addition, when forming the coating layer 3 as in this embodiment, it is easier than pasting the leather with an adhesive as in the past, and since expensive leather is not used, manufacturing costs can be reduced. is planned.

The present invention is not limited to the above-mentioned embodiments, but may be configured as follows without departing from the spirit of the invention. (1) As the filler contained in the paint, polyester piles, polyurethane beads, etc. may be used instead of polyamide piles. When polyurethane beads are blended, the thickness of the coating layer 3 becomes thinner than when the pile is blended, but the glass fibers 4 do not come out from the surface of the coating layer 3. (2) As the base material 1, a so-called sheet molding compound (hereinafter referred to as SMC) may be used instead of the FRP. This SMC is produced by cutting reinforcing fibers such as glass fibers, impregnating the dispersed strands with a resin solution containing a thermosetting resin such as unsaturated polyester resin, a thickener, filler, pigment, etc. It is a sheet-shaped molding material whose both sides are covered with sheets of (3) In the above example, a tractor cabin was used as a resin molded product, but SMC and F
It may also be a resin molded product using RP.

[0016]

Effects of the Invention The resin molded article of the present invention has excellent workability when coating the surface of fiber-reinforced resin, and has the effect of reducing manufacturing costs.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an example of the present invention, showing a state in which a primer layer and a coating layer are provided on the surface of a base material.

FIG. 2 is an enlarged cross-sectional view of the main part of FIG. 1;

FIG. 3 is a sectional view illustrating a conventional example, showing a state in which leather is pasted on a base material.

FIG. 4 is a cross-sectional view showing the state before the leather is pasted on the base material.

[Explanation of symbols] 1...Base material, 2...Primer layer, 3...Coating film layer, 4...Glass fiber.

Claims (1)

[Claims] 1. A primer layer (2) is provided on a base material (1) made of fiber-reinforced resin, and a coating layer (3) containing a filler is provided on the primer layer (2). Material (1
) A resin molded product characterized by being coated with fibers (4) coming out from the surface of the resin molded product.