Title:
PAPER-FREE PREPREGS
Document Type and Number:
WIPO Patent Application WO/2003/102055
Kind Code:
A1
Abstract:
A paper-free prepreg constituted of a reinforcing fiber-matrix layer prepared by impregnating a reinforcing fiber with a non-cured matrix resin and a releasing resin film which has a heavy surface exhibiting a high peel strength and a light surface exhibiting a low peel strength and adheres to one surface of the reinforcing fiber-matrix layer with the heavy surface being in contact with the reinforcing fiber-matrix layer, wherein the heavy surface exhibits a peel strength of 200 g/cm or below and the peel strength ratio of the heavy surface to the light surface is 3.0 or above; and a paper-free prepreg as described above which has a cover film adhering to the other surface thereof. When the cover film is a specific thermoplastic resin film made from polyamide 12, ionomer or the like, the prepreg can be molded without removing the cover film.
Inventors:
KAWAKAMI ATSUSHI (JP)
ENDO YOSHIHIRO (JP)
TOMINAGA HIDEAKI (JP)
HIKAWA ETSUHIRO (JP)
ENDO YOSHIHIRO (JP)
TOMINAGA HIDEAKI (JP)
HIKAWA ETSUHIRO (JP)
Application Number:
PCT/JP2003/006511
Publication Date:
December 11, 2003
Filing Date:
May 26, 2003
Export Citation:
Assignee:
TOHO TENAX CO LTD (JP)
KAWAKAMI ATSUSHI (JP)
ENDO YOSHIHIRO (JP)
TOMINAGA HIDEAKI (JP)
HIKAWA ETSUHIRO (JP)
KAWAKAMI ATSUSHI (JP)
ENDO YOSHIHIRO (JP)
TOMINAGA HIDEAKI (JP)
HIKAWA ETSUHIRO (JP)
International Classes:
B32B5/22; (IPC1-7): C08J5/24; B32B5/00
Foreign References:
| JPS5947277A | 1984-03-16 | |||
| JPH07246616A | 1995-09-26 | |||
| JPH10298315A | 1998-11-10 | |||
| JPS59135121A | 1984-08-03 | |||
| JPS5947278A | 1984-03-16 | |||
| JP2002105223A | 2002-04-10 | |||
| JPH08290514A | 1996-11-05 | |||
| JPH09216305A | 1997-08-19 |
Attorney, Agent or Firm:
Takahata, Yasuyo (MAISON-SUNSHINE 1-4, Higashi-Ikebukuro 3-chom, Toshima-ku Tokyo, JP)
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