Carbon fiber, process for production thereof, prepregs, and golf club shafts

A manufacturing method and prepreg technology, applied to golf balls, golf clubs, fiber chemical characteristics, etc., can solve problems such as void traces, epoxy resin and other matrix resin hardening obstacles, and reduced appearance quality, etc., to achieve low bending Modulus of elasticity, improving the accuracy of playing, and improving the feeling of playing

Inactive Publication Date: 2007-03-14
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the composite material molded using this prepreg, traces of voids and wrinkles caused by moisture appear on the surface, causing deterioration of the appearance quality.
In addition, there is also a problem that the hardening of matrix resins such as epoxy resins is hindered.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0139] A copolymer containing 99.5 mol % of acrylonitrile and 0.5 mol % of acrylic acid was polymerized by a solution polymerization method using dimethyl sulfoxide as a solvent to obtain a spinning dope having a copolymer component content of 22% by weight. As the spinning spinneret, a spinneret with a spinning hole diameter of 0.15 mm and a spinning hole number of 3,000 was used. By spraying the spinning dope from the spinning air into the air at a temperature of 40°C, and passing it through the air about 4mm long, it is introduced into an aqueous solution containing 35% by weight of dimethyl sulfoxide at a temperature of 3°C. In the coagulation bath, coagulated fiber bundles are made by dry-wet spinning method. After washing the coagulated fiber bundle with water, it was stretched to 3.5 times in hot water at a temperature of 90° C., and then, an oil agent containing amino-modified silicone was applied to obtain a stretched fiber bundle with the oil agent. The drawn fiber ...

Embodiment 2

[0146] A carbon fiber bundle was produced in the same manner as in Example 1 except that the maximum temperature in the carbonization step was changed to 1,150°C. In addition, by the same method as in Example 1, a prepreg was produced from the produced carbon fiber bundles. Using this prepreg, a flat carbon fiber-reinforced composite material and a cylindrical CFRP rod were produced by the method described above, and their mechanical properties were measured. The production conditions of the carbon fiber bundles, the physical properties of the carbon fiber bundles, the mechanical properties of the flat plate composite material, and the mechanical properties of the cylindrical composite material in this example are shown in Tables 1 to 3.

Embodiment 3

[0148] Carbon fiber bundles were manufactured in the same manner as in Example 1, except that the maximum temperature in the carbonization step was changed to 1,100° C. and the temperature increase rate in the carbonization step was changed to 200° C. / min. In addition, by the same method as in Example 1, a prepreg was produced from the produced carbon fiber bundles. Using this prepreg, a flat carbon fiber-reinforced composite material and a cylindrical CFRP rod were produced by the method described above, and their mechanical properties were measured. The production conditions of the carbon fiber bundles, the physical properties of the carbon fiber bundles, the mechanical properties of the flat plate composite material, and the mechanical properties of the cylindrical composite material in this example are shown in Tables 1 to 3.

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PUM

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Abstract

A carbon fiber tow composed of many carbon filaments and having a strand tensile strength of 3.8 to 5.5 GPa, a strand tensile modulus of 180 to 220 GPa and a carbon crystal size (Lc) of 13 to 18 AA. This carbon fiber tow can be produced by subjecting a precursor fiber tow composed of many polyacrylonitrile filaments which have a lightness difference (DeltaL) of 50 or below and fineness of 1.1 to 1.7dtex to oxidative stabilization and subjecting the stabilized fiber tow to carbonization with the maximum temperature within the range of 1,100 to 1,300 1 / 2 C in an inert atmosphere while raising the temperature from 1,000 1 / 2 C to the maximum temperature at a temperature rise rate of 100 to 2,000 1 / 2 C / min.

Description

technical field [0001] The present invention relates to carbon fibers and methods for their manufacture. The present invention relates to a prepreg comprising such carbon fibers and a matrix resin. The present invention also relates to a golf club using the carbon fiber as one of the constituent materials. The golf club of the present invention is resistant to torsion and bending, and has excellent playing feeling. Background technique [0002] Golf clubs made of carbon fiber reinforced composite materials are generally lightweight and highly rigid. Therefore, a golf club including such a shaft has advantages such as being able to increase the club head speed (ヘツドドスピツド) at the time of hitting and increasing the flight distance of the ball, and is used by many golfers. [0003] Steel golf clubs generally have a low modulus of elasticity. Therefore, golf clubs including such shafts have high hit accuracy and good play feel. However, in order to obtain preferable bending s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22A63B53/10A63B102/32D04H1/00D04H1/42D04H3/00
CPCA63B53/10D01F9/225A63B2209/023D04H3/00Y10T428/249945Y10T428/2918Y10T428/2913Y10T428/249924D01F6/18D01F9/22
Inventor 远藤真泷山浩之安藤伸哉
Owner TORAY IND INC
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