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Towpreg, method for manufacturing same, and method for manufacturing pressure container

A manufacturing method and impregnation technology, which is applied in the manufacture of cylinders, containers, and pressure vessels, can solve the problems of inability to increase fiber strength, increase winding speed, and increase product prices, etc., to achieve tensile strength utilization Excellent, excellent filament winding formability, excellent productivity effects

Inactive Publication Date: 2021-01-05
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the filament winding method is suitable for the manufacture of hollow containers and cylinders, but has the following problem: the method of winding the mandrel while impregnating the conventionally used liquid resin in situ (wet method) In this case, due to the scattering of liquid resin, it is difficult to increase the winding speed, the state of impregnation tends to be uneven, and there are cases where the original strength of the reinforcing fiber cannot be exhibited, etc.
As a method of winding onto a bobbin, there are methods of preventing self-adhesion between tow prepregs by using release paper, etc., and methods of not using release paper, etc., but auxiliary materials such as release paper will It is ideal to increase the price of the product without using release paper, etc.

Method used

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  • Towpreg, method for manufacturing same, and method for manufacturing pressure container
  • Towpreg, method for manufacturing same, and method for manufacturing pressure container

Examples

Experimental program
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Effect test

Embodiment 1

[0113] Mix 80 parts by mass of "jER (registered trademark)" 828 as material [A], 20 parts by mass of GAN as material [B], 7 parts by mass of "jERcure (registered trademark)" DICY7 as material [C], 2 mass parts as the DCMU99 of material [D], prepare epoxy resin composition according to the preparation method of above-mentioned epoxy resin composition.The viscosity (η of this epoxy resin composition at 25 ℃ 25 ) is 4.6Pa·s, the viscosity at 40°C (η 40 ) is 0.84Pa·s, their ratio (η 25 / η 40 ) is 5.4. The glass transition temperature (Tg) of the resin cured plate was 130°C. The evaluation result of the amount of resin loss during the production of the tow impregnation was A, the evaluation result of the unwinding property was A, and the evaluation result of the fiber winding formability was A. These three evaluation results are described in Table 1 as an index showing "productivity". The 0° tensile strength utilization rate of the tow impregnated cured product was 92%.

Embodiment 2～4

[0115] Except having changed the resin composition as shown in Table 1, the epoxy resin composition, the resin cured board, and the tow impregnated cured product were produced by the same method as Example 1. The evaluation results are shown in Table 1.

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Abstract

The present invention addresses the problem of providing: a towpreg that has superior bobbin unspoolability and process pass-through properties, and is capable of yielding a fiber-reinforced compositehaving extremely high 0-degree tensile strength utilization; and a pressure container using such a towpreg. The means for solving this problem is a towpreg obtained by impregnating a reinforcing fiber tow with an epoxy resin composition containing [A]-[D], wherein: the epoxy resin composition contains 10-90 parts by mass of [A] and 10-50 parts by mass of [B] per 100 parts by mass of the epoxy resin component; the epoxy resin composition has a 25 DEG C viscosity ([eta]25) of 1-40 Pa*s and a 40 DEG C viscosity ([eta]40) of 0.2-5 Pa*s; and the cured epoxy resin composition has a glass transitiontemperature (Tg) of 95 DEG C or higher. [A] A bisphenol epoxy resin [B] Unsubstituted or substituted N,N-diglycidyl aniline [C] Dicyandiamide [D] A cure accelerator.

Description

technical field [0001] The present invention relates to towpregs, which are particularly suitable for the manufacture of hollow containers, cylinders, made of fiber-reinforced composite materials. More specifically, it relates to a tow impregnating material capable of obtaining a fiber-reinforced composite material having excellent unwinding properties from a bobbin, excellent fiber winding formability, and extremely high 0° tensile strength utilization, and the use of A pressure vessel for this tow impregnation. Background technique [0002] Conventionally, fiber-reinforced composite materials composed of reinforcing fibers such as carbon fibers and glass fibers and thermosetting resins such as epoxy resins and phenolic resins are lightweight and have excellent mechanical properties such as strength and rigidity, heat resistance, and corrosion resistance. In many fields such as aviation / aerospace, automobiles, railway vehicles, ships, civil construction and sporting goods....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24F17C1/00
CPCY02E60/32C08J5/243C08J2363/02C08J5/04C08G59/4021C08K5/21F17C1/16B29D22/003B29C63/04C08J5/24C08K5/3155C08K5/0025C08J2363/00C08J2375/02
Inventor 都筑正博佐野健太郎釜江俊也
Owner TORAY IND INC