Partially divided fiber bundle and manufacturing method thereof, fiber-reinforced resin molding material and manufacturing method thereof

A fiber-reinforced resin and a technology for a manufacturing method, which are applied in the fields of partially split fiber bundles and their manufacturing, as well as fiber-reinforced resin molding materials and their manufacturing fields, to achieve the effects of productivity, continuous and stable cutting, and efficient manufacturing

Active Publication Date: 2021-07-30
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method involves forming a flow path in the fiber bundle to facilitate resin impregnation, and it is essentially a different technology from fiber splitting of fiber bundles such as large tows.

Method used

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  • Partially divided fiber bundle and manufacturing method thereof, fiber-reinforced resin molding material and manufacturing method thereof
  • Partially divided fiber bundle and manufacturing method thereof, fiber-reinforced resin molding material and manufacturing method thereof
  • Partially divided fiber bundle and manufacturing method thereof, fiber-reinforced resin molding material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] The fiber bundle [A-1] was unwound at a constant speed of 10 m / min using a winder, widened by a vibrating widening roll vibrating in the axial direction at 10 Hz, and passed through a width limiting roll of 60 mm width, This results in a widened fiber bundle with a width of up to 60 mm.

[0150] The obtained widened fiber bundles were continuously immersed in a sizing agent treatment liquid (which was obtained by diluting the sizing agent [S-1] with purified water), and the sizing agent was applied to the widened fiber bundles, and then heated to 150°C The widened fiber bundle coated with the sizing agent was supplied to a heated roll and a drying oven at 200° C., and dried to remove water. The resulting widened fiber bundle after the application of the sizing agent was calculated based on the measurement method of the aforementioned sizing agent adhesion amount, and it was 3.2%. In addition, this is the total adhesion amount including the sizing agent provided to the ...

Embodiment 2

[0157] The fiber bundle [A-1] was unwound at a constant speed of 10 m / min using a winder, widened by a vibrating widening roll vibrating in the axial direction at 10 Hz, and passed through a width limiting roll of 60 mm width, In this way, a widened fiber bundle widened to 60 mm was obtained, and the widened fiber bundle was subjected to a split treatment to obtain a partially split fiber bundle, and then the sizing agent was applied, and the evaluation was performed in the same manner as in Example 1. As a result, the sizing agent adhesion amount was 3.3%, the bending strength was 430 MPa, the bending elastic modulus was 27 GPa, and the CV8% of the bending elastic modulus.

Embodiment 3

[0159] The fiber bundle [A-1] was unwound at a constant speed of 10 m / min using a winder, dipped in the sizing agent treatment solution, and passed through a vibrating widening roll vibrating in the axial direction at 5 Hz to obtain a sizing agent coating After the completion of the widened fiber bundles, the widened fiber bundles after the sizing agent coating is completed are subjected to fiber splitting, so as to make part of the fiber bundles after the sizing agent coating is completed, and the resulting sizing agent coating is completed. Evaluation was carried out in the same manner as in Example 1 except that a part of the split fiber bundle was subjected to a drying step to obtain a part of the split fiber bundle. As a result, the sizing agent adhesion amount was 3.2%, the bending strength was 435 MPa, the bending elastic modulus was 28 GPa, and the CV of the bending elastic modulus was 7%.

[0160]As described above, it was confirmed that in any of Examples 1 to 3, exc...

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Abstract

A method for producing a partially divided fiber bundle, a partially divided fiber bundle obtained therefrom, a fiber-reinforced resin molding material using the same, and a method for producing the same, wherein the method for producing a partially divided fiber bundle includes: The partial fiber splitting process in which the fiber splitting section and the non-fiber splitting section that are divided into multiple bundles are alternately formed in the longitudinal direction of the fiber. In the partial fiber splitting process, a fiber splitting mechanism with a plurality of protrusions is inserted into the fiber bundle Thereby, the fiber splitting unit is formed, the fiber splitting mechanism is pulled out from the fiber bundle, the fiber splitting mechanism is inserted into the fiber bundle again, and the sizing agent is applied at any timing in the manufacturing process of the partially split fiber bundle. The fine fiber bundles and the thick fiber bundles can be mixed in the molding material in an optimal state, and the fluidity during molding and the mechanical properties of the molded product can be well-balanced.

Description

technical field [0001] The present invention relates to a method for producing a partially-divided fiber bundle, and the partially-divided fiber bundle obtained therefrom. When the fiber bundle of the bundle is subjected to a specific partial fiber splitting treatment (which can form a partially split fiber bundle with the best shape for the preparation of the molding material used in composite material molding), the sizing agent is given at an appropriate timing (in the original In the case where the fiber bundle has been given a sizing agent, it is an additional sizing agent.) The method for producing a partially divided fiber bundle, the partially divided fiber bundle obtained thereby, and the partially divided fiber bundle mat A fiber-reinforced resin molding material obtained by melting and impregnating a resin, and a manufacturing method including a series of steps until the fiber-reinforced resin molding material is produced. Background technique [0002] Molding in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D02J1/18B65H51/005
CPCB65H51/005D02J1/18B29B15/122D02J1/08B29C70/18
Inventor 本桥哲也桥本贵史馆山胜布施充贵松井明彦佐藤智麻
Owner TORAY IND INC
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