JPH06198734A - Treatment method for making surface of frp product uneven - Google Patents

Abstract

PURPOSE:To make uneven the bottom surface of an FRP bathtub and others on site, easily, in a short time, and at low costs. CONSTITUTION:The surface 1A of an FRP product 1 is roughened, and the roughened part 1B is coated with an uncured resin liquid 4. After particles, which are soluble in water and not soluble or hardly soluble in the resin liquid, being deposited on the surface of the resin liquid 4, the resin liquid is cured to form a cured resin layer. The cured resin layer 6 is then washed with water to remove the particles by dissolution. In this way, the cured resin layer is formed which has an irregular surface produced by the removal of the particles. The cured resin layer, since it is formed on the roughened part of the surface of the FRP product, has high adhesion to the FRP product to be hardly peeled off. In spite of its irregularities, the surface of the cured resin layer, as it still remains as a resin surface, can be cleaned easily from stains. Nonslip-treatment can also be done easily on site for the bottom surface of an FRP bathtub.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface roughening treatment method for FRP products, and more particularly to a surface roughening treatment method for FRP products which is effective for roughening the inner bottom surface of a bathtub.

[0002]

2. Description of the Related Art At present, a bathtub manufactured by integrally molding FRP is put into practical use. However, since the bottom surface of a bathtub made of FRP is slippery, it cannot be used by the elderly, infants, or persons with physical disabilities. It took a great deal of attention for people to take a bath.

As a method for preventing the bottom surface of this FRP bathtub from slipping, a work is added to the molding die to form fine irregularities on the bottom surface in the molding step. Stick non-slip tape. There is a method such as.

[0004]

However, in the method of making a work on the molding die, it is necessary to prepare a die for which a work is separately made for each product, and the die cost is high. Therefore, it is not suitable for producing a large number of products in small quantities.

On the other hand, although the method of sticking the anti-slip tape can be carried out easily and at low cost, it has drawbacks that the tape is easily soiled and easily peeled off.

The present invention solves the above-mentioned conventional problems, and FR
An object of the present invention is to provide a method for making unevenness on the surface of an FRP product, which can easily make unevenness on the bottom surface of a bathtub made of P or the like in the field.

[0007]

According to a first aspect of the present invention, there is provided a method for roughening a surface of an FRP product, wherein a step of roughening the surface of the FRP product and an uncured resin liquid are applied to the roughened portion. A step of adhering, a step of adhering water-soluble and insoluble or hardly soluble particles to the resin liquid on the surface of the resin liquid, and a step of curing the resin liquid to form a resin cured layer And a step of supplying water to the surface of the resin cured layer to dissolve and remove the particles.

In the method for treating the surface of the FRP product with unevenness according to claim 2, the surface of the FRP product is a part of the bottom surface of the bath, and only a predetermined part of the bottom surface is formed by using a template. It is characterized in that the periphery of the roughened portion is masked before the sanding to roughen the surface and then to cure the uncured resin liquid.

[0009]

[Function] The resin liquid is cured with water-soluble, insoluble or hardly soluble particles attached to the surface of the uncured resin liquid attached to the roughened portion of the FRP product. After that, when water is supplied to the surface of the formed resin cured layer,
The water-soluble particles are dissolved and removed.

As a result, a cured resin layer having a roughened surface due to the traces of removal of the water-soluble particles is formed. Since this resin cured layer is formed on the roughened portion of the FRP product, it has a high adhesion strength to the FRP product and is very difficult to peel off. The surface of the resin cured layer is uneven,
Since it is the surface where the resin liquid has been hardened, dirt hardly adheres,
Even if dirt adheres, it can be easily cleaned and removed.

According to the method of the second aspect, the bottom surface of the FRP bathtub can be easily treated to prevent slippage during on-site construction.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view for explaining an embodiment of a method for treating the surface of a FRP product according to the present invention.

The illustrated method is a method of roughening the bottom surface 1A of the FRP bath tub 1. First, the bottom plate 1A of the FRP bath tub 1 is covered with a template 2 (FIG. 1 (a)), and the bottom surface 1A. Roughening is performed by sanding only a predetermined portion of the roughened surface (FIG. 1 (b)), and then the periphery of the roughened surface 1B is masked with a mask 3 (FIG. 1 (c)). The uncured resin liquid 4 is attached to the surface 1B (FIG. 1).
(D)). Next, water-soluble and insoluble or sparingly soluble particles 5 are dispersed and attached to the surface of the uncured resin liquid 4 (FIG. 1 (d)). In this state, the resin liquid 4 is cured to form a resin cured layer, and after curing, the mask is removed and water (or hot water) is supplied to the surface of the resin cured layer 6 to dissolve and remove the particles 5 (see FIG. e)).

As a result, the cured resin layer 6 having a roughened surface 6A due to the traces of particle removal is formed. Since the resin cured layer 6 is formed on the roughened surface 1B of the bath 1, it has high adhesive strength and is hard to peel off. Further, since it is the resin surface, dirt is unlikely to adhere, and even if dirt adheres, it can be easily removed.

In the present invention, the roughening treatment can be performed by sandblasting or sandpaper treatment.

The resin liquid may be either a room temperature curing type or a heat curing type, but it is preferable to use a room temperature curing type in the case of on-site construction. As resin, FRP
FR by using the same color or colorless as the product
It is possible to enhance the sense of unity between the P product and the cured resin layer.

The amount of the resin liquid used is such that a resin cured layer having a desired thickness is formed. This cured resin layer
The thickness of the FRP product is appropriately determined depending on the type of FRP product to be formed, the purpose of use, etc., but in general, the thickness is about 0.3 to 2 mm.

When the resin liquid is adhered in a masked state using a mask after roughening the surface using the template, the size of the opening of the template (for example, (FIG. 1 (a))).
Size of the opening of the mask with respect to the diameter d _{1 of}
The diameter d _{2 in} FIG. 1 (c) is slightly larger, for example d ₂
= D ₁ +1 mm is preferable.

As described above, the particles to be adhered to the resin liquid are not particularly limited as long as they are water-soluble and insoluble or hardly soluble in the resin liquid. Specifically, granulated sugar, sugar and the like can be used. The particle size is appropriately determined according to the degree of unevenness of the uneven surface to be formed, but in general, a particle size of 50 to 500 μm is used.

The present invention will be described in more detail with reference to specific examples.

Example 1 According to the method shown in FIG. 1, the bottom surface of the existing FRP bath was roughened.

First, the bottom of the FRP bathtub has a diameter of 29 mm.
Was covered with a template in which the openings were formed, and the openings were sanded to roughen the surface. Then, a mask with an opening having a diameter of 30 mm is covered, and the surface of the roughened surface is treated with the FRP
A room temperature curable resin liquid (acrylic urethane liquid + curing agent + thinner) of the same color as the bath tub was applied with a brush to a thickness of about 0.5 mm.

Granulated sugar was sprinkled on the surface of the resin solution and left at room temperature for 24 hours to cure the resin.

After curing, hot water was poured into the cured resin layer and washed with water. As a result, the granulated sugar was dissolved and a resin cured layer having a fine uneven surface with traces of granulated sugar particles was obtained.

The cured resin layer did not come off during bathing or cleaning, and it was difficult for dirt to adhere. Further, the adhered dirt could be easily removed with a bath detergent.

In this embodiment, a hardened layer of roughened resin having a diameter of 30 mm is formed on the bottom surface of the bath by such a method.
Two pieces were formed in a dotted pattern, and a good anti-slip effect could be obtained.

The above embodiment is an example in which the method of the present invention is applied to the roughening of the bottom surface of the bathtub, but it goes without saying that the present invention is not limited to the bathtub and can be applied to various other FRP products.

[0029]

As described in detail above, according to the method for treating the surface of an FRP product with unevenness according to the present invention, a hardened resin layer on the surface of the FRP product is less likely to become contaminated and can be easily removed by cleaning. The uneven surface due to the high adhesion strength,
It can be formed easily and at low cost.

According to the method of the second aspect, the bottom surface of the FRP bathtub can be easily treated to prevent slippage during on-site construction.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a method of an example of a method for treating the surface of a FRP product according to the present invention.

[Explanation of symbols]

 1 FRP product 2 template 3 mask 4 uncured resin liquid 5 particles 6 resin cured layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuaki Matsumoto 5-1, Koi Ehoncho, Tokoname City, Aichi Prefecture Inax Co., Ltd. (72) Inventor Tomiichiro Iida 5-1-1, Koiemotocho, Tokoname-shi, Aichi Stock Company Inside Inax (72) Inventor Masahito Sugino 5-1-1 Koiemotocho, Tokoname City, Aichi Prefecture Inside Inax Co., Ltd.

Claims (2)

[Claims] 1. A step of roughening the surface of an FRP product, a step of adhering an uncured resin liquid to the roughened portion, a surface of the resin liquid being water-soluble, and A step of adhering particles that are insoluble or hardly soluble in the resin liquid, a step of curing the resin liquid to form a resin cured layer, and supplying water to the surface of the resin cured layer to dissolve and remove the particles And a step of applying the unevenness treatment to the surface of the FRP product. 2. The surface of the FRP product is a part of the bottom surface of the bathtub according to claim 1, and only a predetermined portion of the bottom surface is sanded and roughened by using a template, and then the uncured resin liquid is used. A method for making unevenness on the surface of an FRP product, characterized in that the periphery of the roughened portion is masked before being cured.