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Prepreg, prepreg laminate, and method for producing prepreg

A manufacturing method and prepreg technology, applied in the field of prepreg, can solve the problems of long forming time and poor formability, and achieve the effect of excellent mechanical strength

Active Publication Date: 2022-01-18
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are technical problems in that the shape of the product is poor, or the molding time for complete curing is long.

Method used

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  • Prepreg, prepreg laminate, and method for producing prepreg
  • Prepreg, prepreg laminate, and method for producing prepreg
  • Prepreg, prepreg laminate, and method for producing prepreg

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0212] On both surfaces of the substrate (B-1), one sheet of the liquid crystal polymer film (A-1) cut to a width of about 240 mm was stacked so that the alignment direction of the liquid crystal polymer coincided with the alignment direction of the substrate. This laminate is continuously sent to the heating furnace of the above-mentioned prepreg production machine, and the liquid crystal polymer film is thermally melted at 300°C, and the liquid crystal polymer is melted and impregnated into the base material, thereby obtaining a prepreg material. The weight per unit area of ​​the obtained prepreg was 156 g / m 2 , the thickness is 0.1mm. The degree of molecular chain orientation of the liquid crystal polymer contained in the prepreg was also measured by the same method as the liquid crystal polymer film (A-1), and it was 48%.

[0213] The obtained prepreg was molded into a sheet shape of 140 mm×140 mm, and this was stacked 26 times in the 0° direction. This was press-molded...

Embodiment 2

[0215] A prepreg was obtained in the same manner as in Example 1 except for using the liquid crystal polymer film (A-3). The weight per unit area of ​​the obtained prepreg was 157 g / m 2 , the thickness is 0.99mm.

[0216] A prepreg laminate having a thickness of 2 mm in Example 2 was obtained in the same manner as in Example 1 except that the pressing temperature was 340° C. and the pressing pressure was 4 MPa. The volume content of the carbon fiber bundles in the prepreg laminate of Example 2 was 49%. Table 1 shows the contents of the liquid crystal polymer (A-3) and the base material (B-1) in the prepreg laminate of Example 2.

Embodiment 3

[0218] A prepreg was obtained in the same manner as in Example 1 except for using the liquid crystal polymer film (A-3).

[0219] The prepreg laminate of Example 3 was obtained by the same method as in Example 1 except that the pressing temperature was 340° C., the pressing pressure was 4 MPa, and the pressing time was 6 minutes. Table 1 shows the contents of the liquid crystal polymer (A-3) and the base material (B-1) in the prepreg laminate of Example 3.

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Abstract

The present invention relates to a substrate prepreg comprising an aligned liquid crystal polymer and a continuous carbon fiber bundle as a forming material, the liquid crystal polymer being a thermotropic liquid crystal polymer, relative to the liquid crystal polymer 100 Parts by mass include not less than 25 parts by mass and not more than 550 parts by mass of the substrate.

Description

technical field [0001] The present invention relates to a prepreg, a prepreg laminate, and a method for producing the prepreg. [0002] This application claims priority based on Japanese Patent Application No. 2016-147332 filed in Japan on July 27, 2016, the content of which is incorporated herein by reference. Background technique [0003] Carbon fiber-reinforced plastic (Carbon-Fiber-Reinforced Plastic, also known as CFRP) based on thermosetting resins such as epoxy resin, unsaturated polyester resin, and bismaleimide resin. Lightweight, specific strength, and specific elasticity Excellent modulus. Therefore, CFRP based on a thermosetting resin is used for aerospace applications, automotive applications, sports applications, and general industrial applications. [0004] CFRP based on thermosetting resin has excellent mechanical properties. However, when using this as a prepreg, low-temperature storage is required to suppress curing reaction. In addition, there are tech...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/04
CPCC08J5/042C08J2367/04C08J2300/12C08J2377/12C08J2367/00C08J5/243C08J5/04C08G63/605C08G2250/00
Inventor 小松晋太郎
Owner SUMITOMO CHEM CO LTD