JP2002001881A - Fiber reinforced resin molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber reinforced resin molded article reduced in defoaming work, capable of being manufactured with good productivity and not generating the falling-off or peeling of a surface resin layer caused by residual air bubbles. SOLUTION: The fiber reinforced resin molded article is provided with a fiber reinforcing layer containing fluorosilicone oil containing poly (3,3,3- trifluoropropylmethylsiloxane).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber-reinforced resin molded product used for bathtubs, bathroom panels, and other housing equipment.

[0002]

2. Description of the Related Art Conventionally, many resin molded products have been used for housing equipment members. Among these, resin molded products requiring high strength, such as bathtubs and bathroom panels, are made of fiber-reinforced plastic (FR) containing fibers such as glass fibers.
P). In order to manufacture such a fiber-reinforced resin molded product, a surface resin layer formed by applying and curing a gel coat resin or the like on a molding surface of a molding die is first formed. The fiber reinforced layer is formed by supplying fibers such as glass fiber and resin to the surface of the surface resin layer by an up molding method, and then, before the resin of the fiber reinforced layer is cured, the fiber reinforced layer is formed with a roller or a brush. The surface was rubbed to remove bubbles so that no bubbles remained in the fiber reinforced layer.

However, in the aforementioned fiber-reinforced resin molded product,
Since it is difficult for air bubbles to escape from the fiber reinforced layer, a large amount of labor is required for the defoaming operation, which has been a detriment to improving productivity. Also,
In the above-mentioned fiber reinforced resin molded product, it is difficult to completely remove bubbles from the fiber reinforced layer by the defoaming operation, and bubbles remain between the surface resin layer and the fiber reinforced layer. When a thermal or mechanical shock is applied, there has been a problem that the surface resin at a portion corresponding to the bubble is missing or peeled, resulting in poor appearance.

[0004]

SUMMARY OF THE INVENTION According to the first and second aspects of the present invention, a defoaming operation is reduced, the production can be carried out with good productivity, and a fiber-reinforced resin molding which does not lose or peel off the surface resin layer due to residual air bubbles. Goods.

[0005]

DISCLOSURE OF THE INVENTION The present invention provides poly (3,3)
The present invention relates to a fiber-reinforced resin molded article provided with a fiber-reinforced layer containing a fluorosilicone oil containing (3,3-trifluoropropylmethylsiloxane) as a component. Further, the present invention relates to the fiber-reinforced resin molded product, wherein a surface resin layer is further formed on the surface of the fiber-reinforced layer.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The fiber reinforced layer is made of poly (3,3,3).
-Trifluoropropylmethylsiloxane) can be formed using a mixture of a resin and a fiber containing a fluorosilicone oil containing trifluorosilicone oil as a component. Examples of the resin include a thermosetting resin such as an unsaturated polyester resin and a vinyl ester resin. Examples of the fiber include glass fiber, and a glass chopped strand having a cut length of 25 mm can be suitably used.
It is preferable to use the fiber in such an amount that the content in the fiber reinforced layer is 10 to 50% by weight in view of strength, weight, price and the like.

As the fluorosilicone oil containing poly (3,3,3-trifluoropropylmethylsiloxane) as a component in the present invention, for example, F.S.
MS-121, FMS-123, FMS-131, FM
S-141 (weight-average molecular weight (measured by gel permeation chromatogram and converted to standard polystyrene) is from 800 to 16,000).

It is preferable that the content of the fluorosilicone oil be 0.1 to 3.0% by weight based on the resin. If the content is less than 0.1% by weight, the effect of eliminating or removing bubbles from the resin or the mixture tends to be insufficient. Further, if the content exceeds 3.0% by weight, the effect of eliminating and removing air bubbles existing in the resin or the mixture is not improved, so that the use amount is increased more than the necessary amount, which tends to be economically disadvantageous. There is.

[0009] The fiber-reinforced resin molded article of the present invention is, for example,
It can be manufactured as follows. (See FIGS. 1 and 2). First, a gel coating resin or the like is applied or sprayed on the surface of the mold 1 that has been subjected to a release treatment by applying a release agent or the like, and then cured to form a surface resin layer 2. The thickness of the surface resin layer 2 is preferably 0.3 to 0.8 mm. If the thickness is less than 0.3 mm, the strength of the surface resin layer 2 tends to be low and cracks and chips tend to occur. If the thickness is more than 0.8 mm, coating or forming for forming the surface resin layer 2 Spraying requires a long time or a large amount of resin, which tends to be disadvantageous in terms of productivity and economy.

Next, a glass fiber and a resin are sprayed on the surface of the surface resin layer 2 using a known spray device, and thereafter, the resin is cured to form a fiber reinforced layer 3 (FIG. 1). The thickness of the fiber reinforced layer 3 is preferably 2 to 6 mm.
If the thickness is less than 2 mm, the strength tends to be low, and if the thickness is more than 6 mm, productivity and economy tend to be disadvantageous. After forming the fiber reinforced layer 3, it is released from the mold 1 to obtain a fiber reinforced resin molded product having a sectional configuration as shown in FIG. It is preferable to use a sandwich gun type spray-up device as the spray device from the viewpoints of air bubble reduction, productivity and workability.

[0011]

Next, the present invention will be described by way of examples.

Example 1 As a resin forming a surface resin layer, a colored gel coat resin containing 8% by weight of a toner as a colorant in an unsaturated polyester resin of isophthalic acid was used. The resin that forms the fiber reinforced resin layer is fluorosilicone oil (Chisso
FMS-121 manufactured by Co., Ltd., weight average molecular weight 800 to 1,0
(00) was used in an isophthalic acid-based unsaturated polyester resin. For the fiber forming the fiber reinforced layer, a glass roving having a weight per unit length of 2310 g / km was cut into 25 mm with a cutter of a sandwich gun type spray-up device and used.

First, a mold release agent is applied to the molding surface of the mold and subjected to a mold release treatment. The colored gel coat resin is sprayed on the molding surface and cured to form a surface resin layer having a thickness of 0.4 mm. did. Next, the above-mentioned resin and fibers are sprayed on the surface of the surface resin layer using a spray-up device of a sandwich gun type, and after defoaming, the resin is cured to obtain a 30 mm weight for a thickness of 3.5 mm. % Fiber was formed. Thereafter, the mold was removed to produce a box-shaped fiber-reinforced resin molded product having an open upper surface such as a bathtub. The residual air bubbles were visually checked after spraying a mixture obtained by spraying a resin and a fiber forming the fiber reinforced layer on the surface of the surface resin layer 2 and after defoaming. Further, the porosity of the produced fiber-reinforced resin molded product was measured according to JIS K 7053 (a method of measuring the porosity of glass fiber reinforced plastic). Table 1 shows the results.

Example 2 As the resin forming the surface resin layer, the same colored gel coat resin as in Example 1 was used. The resin forming the fiber reinforced resin layer includes fluorosilicone oil (Fiss made by Chisso Corporation).
MS-123, weight average molecular weight 2,300-2,50
Orthophthalic acid-based unsaturated polyester resin containing 0.6% by weight of 0) was used. For the fibers forming the fiber reinforced layer, a glass roving of 2310 g / km per unit length was cut into 25 mm with a cutter of a sandwich gun type spray-up device and used.

First, a release agent was applied to the molding surface of the mold and subjected to a mold release treatment. The colored gel coat resin was sprayed and cured on the molding surface to form a surface resin layer having a thickness of 0.5 mm. . Next, the above-mentioned resin and fibers are sprayed on the surface of the surface resin layer using a spray-up device of a sandwich gun type, and after defoaming, the resin is cured so as to have a thickness of 4.
A fiber reinforced layer having a thickness of 5 mm and containing 30% by weight of the fiber with respect to the resin was formed. Thereafter, the mold was removed to produce a box-shaped fiber-reinforced resin molded product having an open upper surface such as a bathtub. The method for evaluating the residual air bubbles was the same as the method described in Example 1. The results are shown in Table 1.

Example 3 As the resin forming the surface resin layer, the same colored gel coat resin as in Example 1 was used. The resin forming the fiber reinforced resin layer includes fluorosilicone oil (Fiss made by Chisso Corporation).
MS-131, weight average molecular weight of 4,500 to 4,80
A terephthalic acid-based unsaturated polyester resin containing 0.5% by weight of 0) was used. For the fibers forming the fiber reinforced layer, a glass roving of 2310 g / km per unit length was cut into 25 mm with a cutter of a sandwich gun type spray-up device and used.

First, a mold release agent was applied to the molding surface of the mold and subjected to mold release treatment. The colored gel coat resin was sprayed and cured on the molding surface to form a surface resin layer having a thickness of 0.4 mm. . Next, the above-mentioned resin and fibers are sprayed on the surface of the surface resin layer using a spray-up device of a sandwich gun type, and after defoaming, the resin is cured to a thickness of 3.
A fiber-reinforced layer having a thickness of 0 mm and containing 30% by weight of fibers with respect to the resin was formed. Thereafter, the mold was removed to produce a box-shaped fiber-reinforced resin molded product having an open upper surface such as a bathtub. The method for evaluating the residual air bubbles was the same as the method described in Example 1. The results are shown in Table 1.

Example 4 As the resin forming the surface resin layer, the same colored gel coat resin as in Example 1 was used. The resin forming the fiber reinforced resin layer includes fluorosilicone oil (Fiss made by Chisso Corporation).
MS-141, weight average molecular weight of 13,000-15,
000) was used in an isophthalic acid-based unsaturated polyester resin. For the fibers forming the fiber reinforced layer, a glass roving of 2310 g / km per unit length was cut into 25 mm with a cutter of a sandwich gun type spray-up device and used.

First, a mold release agent was applied to the molding surface of the mold and subjected to a mold release treatment. The colored gel coat resin was sprayed and cured on the molding surface to form a surface resin layer having a thickness of 0.3 mm. . Next, the above-mentioned resin and fibers are sprayed on the surface of the surface resin layer using a spray-up device of a sandwich gun type, and after defoaming, the resin is cured to a thickness of 3.
A fiber-reinforced layer having a thickness of 0 mm and containing 30% by weight of fibers with respect to the resin was formed. Thereafter, the mold was removed to produce a box-shaped fiber-reinforced resin molded product having an open upper surface such as a bathtub. The method for evaluating the residual air bubbles was the same as the method described in Example 1. The results are shown in Table 1.

Comparative Example 1 An unsaturated polyester resin of isophthalic acid type containing no fluorosilicone oil (FMS-121 manufactured by Chisso Corporation) was used as the resin for forming the fiber reinforced layer.
A fiber-reinforced resin molded product was produced in the same manner as in Example 1. The method for evaluating the residual air bubbles was the same as in Example 1, and the results are shown in Table 1.

Comparative Example 2 Same as Example 2 except that an orthophthalic unsaturated polyester resin containing no fluorosilicone oil (FMS-123 manufactured by Chisso Corp.) was used as the resin for forming the fiber reinforced layer. A fiber-reinforced resin molded product was produced.
The method for evaluating the residual air bubbles was the same as in Example 2, and the results are shown in Table 1.

Comparative Example 3 A terephthalic acid-based unsaturated polyester resin containing no fluorosilicone oil (FMS-131 manufactured by Chisso Corp.) was used as the resin for forming the fiber-reinforced layer.
A fiber-reinforced resin molded product was produced in the same manner as in Example 3. The method for evaluating the residual air bubbles was the same as in Example 3, and the results are shown in Table 1.

Comparative Example 4 An unsaturated polyester resin of isophthalic acid containing no fluorosilicone oil (FMS-141 manufactured by Chisso Corporation) was used as the resin for forming the fiber reinforced layer, except that
A fiber-reinforced resin molded product was produced in the same manner as in Example 4. The method for evaluating the residual air bubbles was the same as in Example 4, and the results are shown in Table 1.

[0024]

[Table 1]

[0025]

According to the first and second aspects of the present invention, the defoaming operation is reduced, the production can be performed with high productivity, and the surface resin layer is not lost or peeled off due to residual air bubbles.

[Brief description of the drawings]

FIG. 1 is a schematic view of a method for producing a fiber-reinforced resin molded product of the present invention.

FIG. 2 is a schematic view of a method for producing a fiber-reinforced resin molded product of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mold 2 Surface resin layer 3 Fiber reinforced layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) // C08L 83:08 C08L 83:08 F term (Reference) 2D032 AB02 4F072 AA04 AA08 AB09 AB28 AD08 AD38 AD47 AL06 4F100 AG00 AK01B AK45 AK52A AK52K BA02 DG01A DG03 DH00A EH61 EJ82A EJ96 GB07 HB06 JL02 JL10

Claims (2)

[Claims] 1. A fiber-reinforced resin molded article comprising a fiber-reinforced layer containing a fluorosilicone oil containing poly (3,3,3-trifluoropropylmethylsiloxane) as a component. 2. The fiber reinforced resin molded product according to claim 1, wherein a surface resin layer is further formed on the surface of the fiber reinforced layer.