Title:
TUBULAR BODY
Document Type and Number:
Japanese Patent JP3219242
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the strength of a tubular body by setting a continuous reeling length of a main fiber of a pre-preg in its longitudinal direction at a twice-reeling length or less.
SOLUTION: A first pair of pre-pregs C1, C1' in which carbon fiber is used as a main reinforcing fiber and a resin-impregnation rate is about 10-20wt.%, are arranged in a manner such that its fiber direction is substantially parallel to the longitudinal direction of tubular body. A second pair of pre-pregs C2, C2' in which carbon fiber is used as a main reinforcing fiber and a resin- impregnation rate is about 50wt.% or less by weight, are arranged in a manner such that its fiber direction is substantially parallel to the circumferential direction of tubular body. An average resin impregnation rate when the first pair of pre-pregs are reeled up three times or more, is about 30wt.% by weight or less. A cutting operation is performed so that the number of continuous reeling of the first pre-pregs is at most twice, thereby obtaining a desired tubular body.
Inventors:
Nobuaki Takamatsu
Tomohiro Kurokawa
Tomohiro Kurokawa
Application Number:
JP24573996A
Publication Date:
October 15, 2001
Filing Date:
August 28, 1996
Export Citation:
Assignee:
Daiwa Seiko Co., Ltd.
International Classes:
A01K87/00; A63B49/10; A63B53/10; A63C11/22; B29C70/16; B29C70/32; B32B1/08; B32B5/00; B32B5/12; A63B102/02; A63B102/04; A63B102/32; B29K105/08; B29L23/00; (IPC1-7): B29C70/16; A01K87/00; A63B49/10; A63B53/10; A63C11/22; B32B1/08; B32B5/00; B32B5/12
Domestic Patent References:
| JP924554A | ||||
| JP8207166A |
Attorney, Agent or Firm:
Toshiro Ochi