JPS6259031A - Carbon fiber composite pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is applicable to golf clubs, gateball, badminton,
This invention relates to a carbon fiber composite tube that can be used for shafts of tennis rackets, ski poles, etc.

<Prior Art> Carbon fiber composites made of synthetic resin have the characteristics of high strength and elasticity due to the amount of a, so they are used for golf shafts and fishing rods. It is used for ski poles, handles for various tools, and other industrial and transportation-related applications, and new uses are being developed.

<Problems to be solved by the invention> From the perspective of impact resistance, such composite pipes made mainly of carbon fibers also have the problem of the carbon fibers breaking or breaking due to strong impacts. I'm here.

In particular, carbon fiber itself has drawbacks in terms of bending resistance and impact resistance, and this has been a problem as a material for shafts and the like.

Means for Solving the Problems> Therefore, the carbon fiber composite pipe of the present invention was developed in order to solve the problems of carbon fiber by integrating the carbon fiber with other fibers.

Its structural feature is that the repeating unit is a laminate made of synthetic fiber paper and filament yarn layered with a laminated resin, or the repeating unit is the laminate and carbon fiber layer, and these are resin-molded into a tubular shape.

The filament threads herein include synthetic wI fiber filaments, synthetic fiber filaments 1-, and carbon fiber filaments, and vinylon filaments are particularly preferred as the synthetic fiber filaments.

The laminate is made of synthetic 1111! A synthetic fiber paper layer is formed on one or both sides of a single layer of fiber filament (see Figures 1 and 2), or a laminate in which a carbon fiber filament layer, a synthetic fiber filament layer, and a synthetic fiber paper layer are sequentially laminated. (Figure 5 (a)), a layer in which a synthetic iron fiber filament layer, a carbon fiber filament layer, and a synthetic fiber paper layer are sequentially laminated (Figure 5 (b)), a layer in which synthetic fiber filaments and carbon fiber filaments are alternately arranged. and synthetic fiber paper layer (same (C)), synthetic fiber filament and charcoal 1A
Ia fiber filament mixed layer and synthetic &&! 2) of waste paper! ! Those consisting of J ((d)), etc. can be listed. These are integrated using laminated resin.

Synthetic fiber filaments are vinylon and nylon.

These include polyester, acrylic, aramid fibers (trade name: Kevlar), and good examples include vinylon filament, synthetic mK, and vinylon Kt. Laminated 411! The fat is polyvinyl alcohol (lower PVA
(3) is preferable, but it is not limited to PVA as long as it can firmly integrate the fibers and the synthetic fiber paper at 1°C.

Synthetic fiber filaments have a light specific gravity and low elongation.
Any other material may be used as long as it is flexible and strong. The same applies to synthetic fiber paper. 1. Thermosetting resins, especially epoxy resins, are suitable for the molding resin of the tubular l\\.

This kind of h'tJ-built carbon fiber composite pipe overcomes the problem of carbon fibers breaking or breaking due to strong impact, which is a problem when using only carbon fibers, by combining synthetic fiber filaments and synthetic fiber paper. These properties solve the problem of carbon fiber itself having poor bending strength. In addition, synthetic fiber paper has the effect of improving directionality and impact resistance against the action of force.

<Example 1> Vinylon filament as a synthetic fiber filament (
3,600 denier), 4% I) as resin
A VA aqueous solution was applied and impregnated at a rate of 130 g/m, and the upper and lower sides were wrapped in a sandwich shape with 50 μm vinylon paper (trade name: Nislon, manufactured by Nakatari Paper Co., Ltd.), which is a synthetic fiber paper.

Spread the vinylon filament to a width of about 2m,
A fiber-reinforced sheet 1- as shown in FIG. 2 was obtained. The obtained fiber-reinforced sheet is flat and can be colored freely. In addition, FIG. 1 and FIG. 2 show examples of fiber-reinforced sheets.

FIG. 11M had a synthetic fiber paper layer on one side, and the latter had a synthetic fiber paper layer on both sides, which was used in this example.

When molding the U&fiber-reinforced sheet obtained above, it is used after being impregnated with a thermosetting resin, such as an epoxy resin or a polyester resin, as appropriate.

The situation is shown in Figure 3. The illustrated example is a sheet for making a tapered annular body, and the sheet (b) of the present invention is impregnated with an epoxy resin in contrast to the sheet (a) in which carbon fiber (1) is impregnated with an epoxy resin. It was pasted together.

This product was made into a tubular body as shown in FIG. In the figure, symbol (1) is carbon fiber, (2) is vinylon filament, and (3) is vinylon. Heat treatment of such a tubular body was first described by the present inventor in Utility Model Application No. 110/1983. The proposed heat treatment furnace was used.

The resulting tubular body is lightweight, has high strength, and is highly elastic.
There was no breakage or other accident.

<Example 2> Carbon fiber filament (1) thinly spread in a planar shape (
7 μx 6000 pieces, made by Toshi ■, trade name: trading card), vinylon filament)-(2) (1200 denier x 3, made by Kuraray, trade name: Cremona) is placed in a layer on top of the layer,
This is impregnated with epoxy resin and vinylon paper (3) (
It was supplied onto a 50 μm thick sheet (manufactured by Nakao Paper Industries, trade name Nislon), squeezed and pressed between rollers, and wound onto release paper to obtain an IA fiber-reinforced sheet.

Such a fiber-reinforced sheet is shaped into a sheet with different widths between the ends as shown in Fig. 3, and is wound around a core metal in five layers, and then a polypropylene tape is wrapped under pressure on one surface, and the sheet is placed in the heat treatment furnace. heat treated inside.

After cooling this, the core metal was removed, and as shown in Figure 6, a tubular body with a multilayer structure consisting of vinylon paper (3), charcoal mmm filament (1), and vinylon filament (2) as repeating units was obtained. was obtained, and became the optimal shaft for golf clubs. In addition, it has become suitable for use in shafts for badminton and tennis rackets, gateball sticks, ski slats, table tennis rackets, Kendo shinai and other sports equipment, fishing rods, antennas, and the like.

<Example 3> Using the same material as in the previous example, carbon fiber filament (1) was first placed on vinylon paper (3), and then vinylon filament (2) was laminated in layers, and the same material was used as in the example above. Similarly, a laminate fiber-reinforced sheet as shown in FIG. 5(b), which was integrated with epoxy resin, was prepared.

Example 1 of this fiber-reinforced sheet (b) shown in Figure 3
The sheets 1 to 1 were stacked on a sheet (a) in which carbon fibers were impregnated with an epoxy resin, and the obtained sheets 1 to 1 were wound around a metal core and heat treated in a heat treatment furnace in the same manner as in the previous example.

After cooling it and removing the core metal, as shown in Figure 7, 2g of carbon! Fiber layer, vinylon fiber, carbon fiber,
A tubular body with a multilayer structure in which the vinylon paper layer is used as a green return unit is 1
1! It was done.

Like the tubular body obtained in the above embodiment, this tubular body is also suitable for shafts of various tools.

Effects of the Invention> The carbon fiber composite tube having the structure described in detail above is flexible and strong without being damaged by impact, so it can be used in many ways as a shaft of not only golf clubs but also other sports equipment. Can be used for

[Brief explanation of the drawing]

FIGS. 1 and 2 are end perspective views showing an example of a laminate. FIG. 3 is a plan view of the sheet before being wound around a core metal. FIG. 4, FIG. 6, and FIG. 7 are end cutaway perspective views of carbon fiber composite pipes obtained by the present invention. Figure 5(a)-(d)
is a longitudinal cross-sectional view of an example of a laminate. (1) Carbon fiber filament (2) Vinylon filament (3) Vinylon paper (a) Sheet made of carbon fiber impregnated with epoxy resin (b) Sli fiber reinforced sheet or higher

Claims (1)

[Scope of Claims] 1 Repeating units of a laminate made of synthetic fiber paper with filament yarns layered with a laminated resin, or repeating units of the laminate and carbon fiber layers, carbon fibers formed by resin molding into a tubular shape. Composite tube. 2. The carbon fiber composite tube according to claim 1, wherein the filament yarn is composed of a synthetic fiber filament or a synthetic fiber filament and a carbon fiber filament. 3. The carbon fiber composite tube according to claim 1, wherein the laminate is formed by sequentially laminating a carbon fiber filament layer, a synthetic fiber filament layer, and a synthetic fiber paper layer. 4. The carbon fiber composite tube according to claim 1, wherein the laminate is formed by sequentially laminating a synthetic fiber filament layer, a carbon fiber filament layer, and a synthetic fiber paper layer. 5. The carbon fiber composite pipe according to claim 1, wherein the laminate comprises two layers: a layer in which synthetic fiber filaments and carbon fiber filaments are alternately arranged, and a synthetic fiber paper layer. 6. The carbon fiber composite tube according to claim 1, wherein the laminate comprises two layers: a layer of a mixture of synthetic fiber filaments and carbon fiber filaments, and a synthetic fiber paper layer. 7. The carbon fiber composite pipe according to any one of claims 2 to 6, wherein the synthetic fiber filament is a vinylon filament. 8 Claim 1 that the synthetic fiber paper is vinylon paper
The carbon fiber composite pipe according to any one of Items 3 to 6. 9. The carbon fiber composite pipe according to claim 1, wherein the laminated resin is polyvinyl alcohol. 10. The carbon fiber composite pipe according to claim 1, wherein the tubular molding resin is an epoxy resin.