To enhance interlaminar strength (peel strength, out-of-plane strength and strength after impact), raise the impregnation efficiency of a matrix during the compositing and further eliminate resin-rich parts to be weak points in strength in a fiber substrate for composite materials.
A single substrate 4 knitted or woven from filaments and having a three-dimensional shape is used or the plurality of substrates 4 are superimposed to raise strength between layers or in joint surfaces. Permeability of the matrix is promoted near the surface and in the interior and a treatment of raising 5 is carried out in order to raise the smoothness of the surface. The treatment of raising is performed even on the fiber substrate for the composite materials prepared by superimposing a plurality of sheetlike substrates knitted or woven from the filaments or superimposing the plurality of the sheetlike substrates and substrates having the three-dimensional shape. The treatment of raising is carried out by needle punching. A fiber web, as necessary, is inserted between fiber constructions simultaneously with the treatment of raising. Thereby, the surface of the fiber substrate is subjected to a smoothing treatment.
NISHIYAMA SHIGERU
SHINYA MASAHIRO
FUKUOKA TOSHIYASU
ISHIBASHI MASAYASU
HASHIMOTO KOICHI
TANAMURA TAKESHI
SAKONJIYOU HIDEKI
HIROKAWA TETSURO
SHIKIBO LTD
| JPS55163132U | 1980-11-22 | |||
| JP2001096653A | 2001-04-10 | |||
| JPH05220861A | 1993-08-31 |
| WO2000056539A1 | 2000-09-28 | |||
| US4622254A | 1986-11-11 | |||
| GB2177345A | 1987-01-21 | |||
| GB2230491A | 1990-10-24 |
Hideka Tanaka
Yoshiyuki Shiraishi
Kunihiko Shiromura
Tsuyoshi Kumano
Hiroaki Yamane