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Resin composition for carbon fiber composite material, towpreg

A technology of composite materials and prepregs, applied in the field of tow prepregs, which can solve the problems of difficulty in maintaining the shape of tow prepregs and the inability to achieve width accuracy

Pending Publication Date: 2021-09-07
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, when using low-viscosity resins, it is difficult to maintain the shape of the tow prepreg, and the width accuracy required for automatic lamination cannot be achieved

Method used

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  • Resin composition for carbon fiber composite material, towpreg

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Using 50 parts by mass of "Araldite (registered trademark)" MY0510 and 50 parts by mass of "EPICLON (registered trademark)" HP4710 as an epoxy resin, and using 45.9 parts of "Aradur (registered trademark)" 9664-1 as a curing agent, 10 parts by mass of "SUMIKAEXCEL (registered trademark)" PES 2603MP as thermoplastic resin and 3 parts by mass of "Garamite (registered trademark)"-7305 as inorganic particles were prepared as described above in Epoxy resin composition, and then a tow prepreg having a resin content of 34% by weight was prepared as described above in .

[0121] Table 1 below shows the state and width accuracy of the tow prepreg after high-speed unwinding, winding test, pressure deformation test, glass transition temperature after curing at 180°C for 2 hours, epoxy resin composition at 60°C The thixotropic coefficient at , the storage modulus at 1 Hz and 23°C, and the glass transition temperature after curing at 180°C for 2 hours.

Embodiment 2 to 4

[0123] An epoxy resin composition and a tow prepreg with a resin content of 34% by weight were prepared in the same manner as in Example 1, except that the components and blending amounts of the epoxy resin composition were changed to Table 1 those shown.

[0124] For the tow prepreg and epoxy resin composition of each example, the following Table 1 shows the state and width accuracy of the tow prepreg after high-speed unwinding, winding test, pressure deformation test, at 180°C Glass transition temperature after curing for 2 hours, thixotropic coefficient of epoxy resin composition at 60°C, storage modulus at 1 Hz and 23°C, and glass transition temperature after curing at 180°C for 2 hours .

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Abstract

A towpreg that is easy to unwind from a bobbin, has good width accuracy after unwinding and can produce a composite material with excellent heat resistance, and a resin composition that gives such a towpreg. A towpreg is characterized by being impregnated with an epoxy resin that contains an epoxy resin which is solid at 23 DEG C in an amount of 30 parts or more in 100 parts by mass of total epoxy resin components, contains a polyfunctional amine type epoxy resin which is liquid at 23 DEG C in an amount of 20 parts or more in 100 parts by mass of total epoxy resin components, and further contains a clay mineral.

Description

technical field [0001] The present invention relates to a tow prepreg having excellent unwinding properties from a bobbin and width accuracy after unwinding and obtaining a composite material excellent in heat resistance, and to a method for obtaining such a tow prepreg material resin composition. Background technique [0002] In the production of fiber-reinforced composite materials, prepregs are generally used, which are intermediate materials in which reinforcing fibers or sheet-like materials, such as woven or non-woven fabrics, arranged in one direction are impregnated with a thermosetting resin. On the other hand, in addition to sheet prepregs, there are also narrow intermediate materials called tow prepregs, filamentary prepregs, prepreg yarns, or thread prepregs, which contain A reinforcing fiber bundle of thousands to tens of thousands of filaments aligned in one direction is impregnated with a thermosetting resin. [0003] Examples of the lamination method of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24C08J5/04
CPCC08J5/042C08J2363/00C08J2481/06C08J5/243C08J5/249C08J3/242C08L63/00
Inventor 高岩玲生武田一朗
Owner TORAY IND INC