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Partially divided fiber bundle and its manufacturing method

A manufacturing method and a technology of fiber bundles, which are applied in the field of partially split fiber bundles and their manufacture, can solve the problems of being unable to control the length of the split treatment section and the non-fiber treatment section, and difficult to obtain the split fiber bundles.

Active Publication Date: 2021-04-23
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this method, the peripheral speed of the roller and the conveying speed of the fiber bundle are basically the same speed synchronously, so it is impossible to control the lengths of the fiber-splitting treatment section and the non-fiber-splitting treatment section, etc., and it is difficult to obtain the optimal form of partial fiber splitting. fiber bundle

Method used

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  • Partially divided fiber bundle and its manufacturing method
  • Partially divided fiber bundle and its manufacturing method
  • Partially divided fiber bundle and its manufacturing method

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Embodiment

[0131] Next, examples and comparative examples of the present invention will be described. It should be noted that the present invention is not limited in any way by the examples and comparative examples.

[0132] [raw materials to use]

[0133] Fiber bundle [A-1]:

[0134] A continuous carbon fiber bundle (manufactured by ZOLTEK, "PANEX (registered trademark) 35") with a fiber diameter of 7.2 μm, a tensile modulus of elasticity of 240 GPa, and a filament number of 50,000 was used.

[0135] Base resin [M-1]:

[0136] The resin compound obtained in the following manner was used: 100 parts by weight of vinyl ester resin (manufactured by Dow Chemical Co., Ltd., "Derakane (registered trademark) 790"), tert-butyl peroxybenzoate (NOF Co., Ltd., "Perbutyl (registered trademark) Z") 1 part by weight, magnesium oxide (manufactured by Kyowa Chemical Industry Co., Ltd., MgO#40) 4 parts by weight as a thickener, stearin as an internal mold release agent 2 parts by weight of zinc acid ...

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Abstract

Partially divided fiber bundle along a fiber bundle formed of a plurality of monofilaments, and method for producing the same, and fiber-reinforced resin molding material using the partially divided fiber bundle, and method for producing the same The length direction of the partly divided fiber bundle formed by being divided into at least three fiber-divided treatment sections and the non-fiberized treatment section alternately, is characterized in that, in the longitudinal direction of the partially divided fiber bundle In an arbitrary cross-section in the width direction, the ratio of monofilaments contained in a region where adjacent split fiber bundles are bonded by the non-fiber-divided portion is 67% or less of all monofilaments in the cross-section in the width direction. It is possible to control the ratio of thin fiber bundles and thick fiber bundles to an optimal range and optimal distribution state when making partially divided fiber bundles into an intermediate base material of discontinuous fiber bundles used in composite material molding , it can express the fluidity during molding and the mechanical properties of the molded product in a good balance.

Description

technical field [0001] The present invention relates to a partially divided fiber bundle and a method for producing the same. More specifically, it relates to an inexpensive large tow with a large number of single filaments that has not been considered to be divided without causing fiber breakage. Partially divided fiber bundle capable of being continuously divided to form an optimal form for making molding materials used in composite material molding, method for producing the same, and fiber-reinforced resin molding material obtained by felting and impregnating the same with resin , and a manufacturing method comprising a series of steps until the fiber-reinforced resin molding material is produced. Background technique [0002] Molding in which a desired shape is produced by heating and press molding using a molding material formed of discontinuous reinforcing fiber (for example, carbon fiber) bundle-like aggregates (hereinafter sometimes referred to as fiber bundles) and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02J1/18B65H51/005
CPCD02J1/18B29B15/122C08J5/248B65H51/005B29B15/105B29K2101/10C08J5/042C08J5/18C08J2333/04D02J1/06D04H1/64D04H1/732D06H3/02D06H7/02D10B2505/02
Inventor 本桥哲也桥本贵史野口泰干河原好宏铃木保佐藤智麻
Owner TORAY IND INC
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