JPS60162632A - Manufacture of composite body - Google Patents

Abstract

PURPOSE:To engage a fiber material with a base material surface so as to improve considerably the adhesion between the base material and the FRP layer, by heating the surface of a thermoplastic synthetic resin base material to be softened, and pressing a fiber material thereon. CONSTITUTION:While a base material 11 of a thermoplastic synthetic resin in the shape of a pipe is rotated in the direction indicated at A and also moved in the direction indicated at B, only the surface of the base material 11 is heated by a burner 12 to be softened. A fiber material 13 in the form of a tape is wound around the surface of the base material 11 that is being rotated. Due to the tension when the fiber material 13 is wound, it is forced into the surface of the base material 11 and engaged therewith. As desirable fiber material can be mentioned felt, nonwoven fabric, raised fabric, etc. A glass fiber fabric 14A in the form of a tape is dipped in an impregnating liquid 14B consisting of a prepolymer or monomer and a hardening agent, and is wound on the fiber material 13. Thereafter, the prepolymer or the monomer is hardened to give a composite body 17. The composite body has therein a firm anchoring effect due to the fiber material 13 engaged into both the base material 11 and the FRP layer 14.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a composite in which a glass fiber reinforced plastic layer (FRP layer) is formed on a thermoplastic synthetic resin base material. It is required that the adhesion between the FRP layer and the FRP layer be good.

However, to date, satisfactory adhesion between the base material and FRPQ has not been achieved, especially when polyolefin with poor adhesiveness such as polyethylene or polypropylene is used as the material for the base material. There was a big problem with the adhesion with the FRP layer. However, the above-mentioned polyolefin has excellent chemical resistance and corrosion-resistant pipe, 1iIit.
It is extremely suitable as a base material for eclipse containers and the like.

Conventionally, in order to improve the adhesion between a polyolefin base material and an FRP layer, a fiber material containing an organic fiber material that can be fused to the base material when heated is wrapped around the surface of the polyolefin base material and heated. A method has been proposed in which a fibrous material is fused to the base material and an FRPi is formed thereon. However, according to this method, the entire base material wrapped with fiber material is seen, so an anchoring effect cannot be expected, and the base material and FR
Adhesion with the P layer is still not satisfactory.

The present invention aims to solve the above conventional problems,
The main idea is to soften the surface of a thermoplastic synthetic resin base material by heating and then press-bond a fiber material to the surface.

Since the present invention has the above-mentioned main points, the fiber material bites into the surface of the base material and exhibits a strong anchoring effect, thereby significantly improving the adhesiveness between the base material and the FRP layer.

The present invention will be explained in detail below.

The thermoplastic synthetic resin base material used in the present invention is mainly made of polyolefin such as polyethylene and polypropylene, but polyamide, polyvinyl chloride = A/
, polyvinylidene fluoride, polyvinylidene fluoride, polystyrene, polymethacrylate 1 acrylonitrile-butadiene-styrene copolymer, and other thermoplastic synthetic resins may also be used.

The fiber material used in the present invention is polyamide fiber,
Air f/L/@Ia, -19S #@W, yl! S:t
- Made of knitted fabrics, non-woven fabrics, fetish fabrics, etc. of 9-ethylene fibers, polypropylene fibers, aramid fibers, ceramic fibers, cotton, wool, recycled fibers, etc., preferably having toughness that does not cause brittle fracture. choose something. A preferred fiber material is Fe/L=l) as shown in FIG. The Feμ material (1) shown in the figure is made by bonding a non-woven fabric (1) B to both sides of a core material (1) A made of a woven fiber fabric by mechanical entanglement using an adhesive or needles, etc.
Polyester fibers are mainly used as the fiber material. Also non-woven fabric.

Raised fabrics and the like are also desirable fibrous materials in the present invention.

These desirable fibrous materials have raised or woven pores on their surfaces, which improves the anchoring effect.

The FRP layer used in the present invention is unsaturated polyester μ,
Styrene monomer, diaryμ phthalate, etc., containing polymerizable sub-carbon double bonds: Li-r-,
Glass fibers are dispersed in monomers or mixtures thereof, or non-woven fabrics made of glass fibers.

The knitted fabric is impregnated with the above-mentioned prepolymer, monomer, and a mixture thereof, such as Pencil μ peroxide and lauroyl peroxide. It is well known to be obtained by curing with a curing agent such as cumene hydroperoxide or, if desired, a mixture of said curing agent and an accelerator.

The manufacturing method of the present invention consists of the following three steps.

Step 1 of heating and softening the surface of the thermoplastic synthetic resin base material; Step 2 of compressing a fiber material onto the surface of the thermoplastic synthetic resin base material that has been softened by heating; Step 2: Reinforcing glass fiber on the pressed fiber material layer. Step 3 of forming a plastic layer The manufacturing method of the present invention will now be described in the order of the steps described above, based on an embodiment shown in FIGS. 2 and below.

In step 1, the base material 0η, which is a pipe made of thermoplastic synthetic resin, is rotated in the direction of the arrow A and moved in the direction of the arrow A, and only the surface of the base material ON) is placed in a burner as shown in FIG. (2) Heating and softening. At this time, the important thing is to heat and soften only the surface of the base material αυ as much as possible. If the softening extends to the deep part of the base material OD, the base material 01) may be deformed.

In step 2, the tape-shaped fiber material is wound around the surface of the rotating base material 09. At this time, base material 09
The surface is in a softened state, and the fibrous material (a) is pressed onto the surface of the base material (11) and digs into it by the tension blowing during winding. If desired, the fibrous material a3 may be crimped with pressure rolls or the like.

In step 3, as shown in FIG. 3, a tape-shaped glass fiber woven fabric α→mu is immersed in an impregnating solution Q4)B consisting of the above prepolymer and/or monomer and a curing agent, and then the woven glass fiber fabric α→mu is immersed in an immersed roll (2). Then, the mixture is wound on the fiber material wrapped around the surface of the base material 0 while adjusting the amount of impregnation through the mung μαQ.

Thereafter, the prepolymer and the L-strapping monomer are cured at room temperature or by heating.

Thus, as shown in FIG. 4, the base material 01) and the FRP layer Q4
A composite αη is obtained in which a fiber material (to) is interposed. In the composite, the fiber material (to) is the base material αp
It penetrates into both the FRP layer and the α-layer, and exerts a strong anchoring effect.

The present invention is not limited to the above examples,
For example, the base material may be in the shape of a container or a flat plate. Further, in addition to a burner, a far infrared heater, an electric heater, etc. may be used to heat and soften the surface of the base material, but as mentioned above, heating at a high temperature and for a short time is desirable in order to heat and soften only the surface of the base material as much as possible.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of felt desirable for the present invention, Fig. 2 and the following are related to one embodiment of the present invention, Fig. fs2 is an explanatory diagram of steps 1 and 2, and Fig. 3 is an explanatory diagram of step 3. FIG. 4 is a cross-sectional view of the layers of the obtained composite. In the figure, 01)...Base material, 02...Burner, 0
...Fiber material, Q4...FRP layer, Q'? )・
...Composite patent applicant: Aron Kasei Co., Ltd. 1. Figure 3.

Claims (2)

[Claims] (1) Process of heating and softening the surface of the thermoplastic synthetic resin base material 1゜Step of pressing the fiber material onto the surface of the thermoplastic synthetic resin base material which has been heated and softening 2゜ Step of pressing the fiber material onto the pressed fiber material layer Method for manufacturing a bonded body consisting of steps 1 and 2.3 of 3° or more step of forming a glass fiber reinforced plastic layer (2) The method for producing a composite according to claim (1), wherein the fiber material is selected from felt, nonwoven fabric, and raised fabric.