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Notched pre-preg and notched pre-preg sheet

A technology of prepreg and prepreg, which is applied in the direction of synthetic resin layered products, vehicle parts, metal layered products, etc. It can solve the problems that it is difficult to apply molding pressure and prone to pores, so as to suppress wrinkles and pores Occurrence, excellent formability, and the effect of suppressing the decline in the strength of parts

Active Publication Date: 2017-05-24
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, it is difficult to apply molding pressure directly under the bridge, and porosity is prone to occur
The generation of this void is a more significant problem in low-pressure molding such as oven molding using a vacuum pump as a pressurization means.

Method used

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  • Notched pre-preg and notched pre-preg sheet
  • Notched pre-preg and notched pre-preg sheet
  • Notched pre-preg and notched pre-preg sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] 13 parts by mass of PES5003P was added and dissolved in 60 parts by mass of "Alaldite (registered trademark)" Y9655 and 40 parts by mass of "Epon (registered trademark)" 825 in a kneader, and 20 parts by mass were kneaded as Then, 45 parts by weight of "Arador (registered trademark)" 9664-1 was kneaded with fine particles of thermoplastic resin particles as a curing agent to prepare a thermosetting resin composition.

[0093] In addition, the above-mentioned microparticles were produced by the following method. 90 parts by mass of transparent polyamide (product name: グリルアミド (registered trademark)-TR55, manufactured by EMSER Werke Co., Ltd.), 7.5 parts by mass of epoxy resin (product name: Epicoat (registered trademark) 828, manufactured by Shell Petrochemical Co., Ltd.) and cured 2.5 parts by mass of a solvent (product name: Tomaid (registered trademark) #296, manufactured by Fuji Chemical Industry Co., Ltd.) was added to a solvent mixture containing 300 parts by mass o...

Embodiment 2

[0108] Toreka (registered trademark) prepreg P3252S-15 (reinforcing fiber: T700S, resin: 2592, volume content of reinforcing fiber: 56%, in A polyethylene film is laminated on one side, and a release paper is laminated on the other side) to make a notched prepreg sheet. Such as figure 2 As shown, the following pattern is formed, that is, slits are intermittently provided in the direction perpendicular to the reinforcement fiber, and the projected length Ws of the projection of the slit in the vertical direction of the reinforcement fiber is equal to the length Y of the slit, which is 1 mm. In the region surrounded by intermittent cuts in the longitudinal direction of the reinforcing fibers, substantially all of the reinforcing fibers were cut into reinforcing fibers having a fiber length L of 24 mm. A polyethylene film is pasted on the surface of the incision prepreg sheet, and when the prepreg is inserted into the incision along the fiber direction in the drum cutting machi...

Embodiment 3

[0111] In addition to cutting patterns such as image 3 A notched prepreg sheet was manufactured in the same manner as in Example 2, except that the fiber length L was 24 mm, and the angle formed by the incision and the reinforcing fiber was 14° in a continuous cut pattern, and the same evaluation was performed. The handleability of the incision prepreg sheet is that since the polyethylene film is cut into short strips along the incision, only the polyethylene film sheet bonded by the scotch tape is peeled off. Polyethylene film sheets require work. The expansion rate of the notched prepreg molding is 2.1, and the surface quality of the expanded molded product is that fluctuations in the flow of fibers can be seen in addition to the opening of the notch. The mechanical properties of the expanded molded product were that the tensile modulus was 46 GPa and the tensile strength was 710 MPa.

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Abstract

The purpose of the present invention is to provide: an intermediate substrate that has excellent handleability and followability for complex shapes, and also achieves good yield, excellent mechanical properties and low variation thereof, as well as excellent dimensional stability as a result of strength-reducing moulding defects, such as wrinkles and voids, occurring less readily when used in a fibre-reinforced plastic, even with low-pressure moulding; and a method for manufacturing a fibre-reinforced plastic, the intermediate substrate being used in said method. This pre-preg, which has a layer that contains reinforcing fibres impregnated with a resin composition, is characterised by: being a notched pre-preg; the rate of impregnation by the resin composition in the pre-preg being within a prescribed range; comprising reinforcing fibres, at least a portion of which is of a prescribed fibre length due to a plurality of notches; and having a reinforcing-fibre volume content Vf that is within a prescribed range.

Description

technical field [0001] The present invention relates to a notched prepreg having a plurality of notches, the prepreg having a layer containing reinforcing fibers impregnated with a resin composition. In more detail, the present invention relates to the above-mentioned notched prepreg, which can be used well as an intermediate base material for fiber reinforced plastics, which can be well suited for aerospace parts, automobiles Parts, sports equipment, etc. Background technique [0002] Fiber-reinforced plastics made of reinforcing fibers and matrix resins have high specific strength and specific modulus, excellent mechanical properties, and high functional properties such as weather resistance and chemical resistance. Therefore, they are attracting attention in industrial applications. , Spaceships, automobiles, railways, ships, electrical products, sports equipment, etc. are widely used in structural applications, and their demand is also increasing year by year. It is kn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24
CPCB32B5/12B32B3/266B29C43/12B32B5/022B32B5/024B32B5/026B32B5/26B32B7/04B32B15/08B32B15/082B32B15/085B32B15/088B32B15/09B32B15/14B32B15/20B32B27/10B32B27/12B32B27/281B32B27/283B32B27/285B32B27/286B32B27/288B32B27/302B32B27/304B32B27/308B32B27/32B32B27/322B32B27/34B32B27/36B32B27/365B32B29/02B32B2255/06B32B2255/10B32B2255/12B32B2255/205B32B2255/26B32B2260/023B32B2260/046B32B2262/0269B32B2262/10B32B2262/101B32B2307/54B32B2605/08B32B2605/18B32B27/08B32B2262/106B29B15/08B29C2793/0081C08J5/243B29C2793/0036B29C70/205C08J5/04B32B27/18B32B2305/076C08J5/24C08J2300/24C08J2300/22B32B5/10C08J5/042C08J2363/02C08J2377/00
Inventor 武田一朗藤田雄三荒井信之佐藤成道
Owner TORAY IND INC
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