JPS6131212A - Manufacture of fiber reinforced resin wire - Google Patents

Abstract

PURPOSE:To prevent core material from fluffing due to friction between fibers, to stabilize the fiber content and to improve the quality by winding a hardened beam of impregnated resin around the core material. CONSTITUTION:Several long fiber reinforced resin beams of hardened impregnated resin are wound simultaneously around the core material 6 supplied continuously, so as to form a wire 7. The wire 7 is then impregnated with a resin liquid to combine the core material 6 and the beam 1. For example, carbon fiber and blass fiber can be applied to FRB beams 1 as long fiber. The thickness of the fiber is not specifically limited but a roving having a thickness of less than which is composed of a bundle of 2,000 to 30,000 lines of about 7mum diameter carbon fiber or 13 to 23mum diameter glass fiber. This continuous fiber is impregnated with thermosetting resin such as epoxy resin, unsaturated polyester resin, phenol resin and etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an FRP wire used as a three-dimensional structure material.

[Prior art]

BACKGROUND ART In recent years, a technology has been developed in which a continuous beam made of continuous fibers such as carbon fibers and glass fibers impregnated with resin such as epoxy resin is wound around a winding die or jig and cured to be used as a large structure. However, the above fiber reinforced resin (FRP)
Beams have high tensile strength, but are easily torn by lateral forces, so it is preferable to use twisted fibers.

In order to manufacture wires from long fiber F-P, a single F-P beam with uncured impregnated resin is twisted, but due to the twisting force, the amount of resin liquid attached and, conversely, the fiber content The ratio (νf) changes, causing variations in quality. Further, since the resin is twisted in an uncured state, the fibers rub against each other and are cut, causing fuzz, which is unsightly, and furthermore, there is a problem in that the strength decreases.

[Purpose of the invention]

It is an object of the present invention to solve the above-mentioned problems and to provide a method for producing F-P wire with uniform fiber content (vf) and high strength.

[Structure of the invention]

The present inventors focused on the fact that the fiber content (νf) does not change even if the torsion applied to the beam changes after the impregnated resin has hardened, and the beam with the impregnated resin hardened is placed around the core material. It has been found that it is possible to produce nine-FBP wire with stable quality by winding the wire.

That is, in the method for manufacturing a PAP wire of the present invention, a plurality of long fiber reinforced resin beams made of hardened impregnated resin are simultaneously wound around a continuously supplied core material to form a wire, and then the wire is This method is characterized by bonding the core material and the beam by impregnating them with a resin liquid.

As the long fibers used in the present invention, those used in F-P beams, such as carbon fibers and glass fibers, can be used.The thickness of the fibers is not particularly limited, but carbon fibers with a thickness of about 7 μm, glass fibers, etc. can be used. For example, a thickness of 13 to 23 μm is 2,000 to sa, o
A bundle of aa threads (roving) with a thickness of less than 11 is used.

As the resin impregnated into these continuous fibers, thermosetting resins such as epoxy resins, unsaturated polyester resins, and phenol resins are used. The fiber content when fibers are impregnated with these resin liquids depends on the viscosity of the resin liquid.

That is, when the viscosity is high, a large amount of resin liquid adheres and the fiber content becomes low, while when the viscosity is low, the resin liquid flows and the fiber content becomes high. The viscosity required to make it % is 50 to 50
0 c-p.

Impregnation with the resin liquid is preferably carried out in an apparatus in a reduced pressure atmosphere, so that water and air in the fibers are removed and the resin liquid quickly permeates into the fibers. Nine F几P obtained in this way
Even if the beam is twisted after being hardened, since the thickness is less than 1, the resin layer will follow the fibers and will not break.

〔Example〕

Examples will be described below with reference to the drawings.

-4 = under reduced pressure of -750 ■ H2 by vacuum suction
A rowing rod with a thickness of about 1-1 consisting of 6,000 to 15,000 carbon fibers with a thickness of 7 μm is sent to a resin impregnating device, and impregnated with an epoxy resin liquid having a viscosity of 150 cm to prepare F-P with a fiber content of 45 to 55%. Got the beam. Next, this F-P beam is heated in a heating device at 100 to 120°C for 1 hour.
The hardened FR of the impregnated resin is passed through for 5 to 60 minutes.
It is made into a P beam 1 and wound onto a bobbin 2 shown in FIG.

To manufacture wire from the above-mentioned FR and P beams 1, for example, four bobbins 2 are set in the bobbin rotating section 4 of the wire manufacturing apparatus 3 as shown in FIG. A core material 6 is fed into the center hole 5 of the bobbin rotating section 4, and the PAP beam 1 taken out from the bobbin 2 is wound around the core material 6 to form a wire 7. Then, it is impregnated with resin again in a resin impregnation tank (not shown).

The FRP wire impregnated with resin in this way is either uncured and wound into a 5-roll mold or jig and then heated and hardened to form a structure, or the resin is heated and hardened immediately after impregnation and used as a general wire. Can be used.

The core material of the above FRB wire is selected from metal, rubber, resin, long fiber beam, etc. depending on the application, and the bobbin rotating section is provided in multiple stages and the rotation direction is alternately reversed. Even stronger wire can be produced.

〔Effect of the invention〕

As explained above, FbonP manufactured by the method of the present invention
When the wire is twisted, the impregnated resin is hardened, so there is no fuzzing due to friction between the fibers, and the fiber content is stable, making it excellent in quality.

Furthermore, when used as a structure, since it is several times thicker than conventional FRP beams, the number of times it is wrapped around a frame etc. is reduced, resulting in improved productivity.

[Brief explanation of the drawing]

FIG. 1 shows a perspective view of a bobbin, and FIG. 2 shows a perspective view of a wire manufacturing device. In the figure, 1...FRP beam 2...Bobbin 3.
...Wire manufacturing equipment 4...Bobbin rotating section 5...
・Hole 6... Core material 7... Wire

Claims (1)

[Claims] A plurality of long fiber reinforced resin beams made of hardened impregnated resin are simultaneously wound around the continuously supplied core material to form a wire, and the wire is further impregnated with resin liquid to form the core material and the beam. A method for manufacturing a fiber-reinforced resin wire, characterized by combining.