Claims
- 1. A method for stretching a fiber-reinforced resin sheet as a starting material in intimate contact with a thermoplastic resin sheet which has a tensile strength larger than the tensile strength of the resin of the starting material fiber-reinforced resin sheet, which comprises heating the fiber-reinforced resin sheet at a temperature at which the resin in the fiber-reinforced resin becomes sticky and subjecting the sheets to a uniform compressive force to adhere the fiber-reinforced resin sheet to the thermoplastic resin sheet such that the fibers are uniformly distributed and are substantially unidirectional, and then stretching both the fiber-reinforced resin sheet and the thermoplastic resin sheet simultaneously, more than 1.5 times the original length of the thus-adhered fiber-reinforced resin sheet and thermoplastic resin sheet in the stretching direction, while they are adhered together to thereby form a thin fiber-reinforced resin sheet due to reduction in thickness by stretching wherein the direction of stretching is perpendicular to the direction of the reinforcing fibers of the fiber-reinforced resin sheet.
- 2. A method according to claim 1 in which the starting material fiber-reinforced sheet is a prepreg sheet in which continuous fibers are arranged unidirectionally therein.
Priority Claims (1)
Number |
Date |
Country |
Kind |
62-14629 |
Jan 1987 |
JPX |
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Parent Case Info
This application is a continuation of now abandoned application Ser. No. 07/357,652 filed on May 25, 1989, which in turn is a continuation of application Ser. No. 07/136,631, filed Dec. 22, 1987, both applications now abandoned.
US Referenced Citations (16)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2282985 |
Mar 1976 |
FRX |
Continuations (2)
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Number |
Date |
Country |
Parent |
357652 |
May 1989 |
|
Parent |
136631 |
Dec 1987 |
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