Toray Industries, Inc.

Toshiaki Higashi

Masahiko Hayashi

Hajime Kishi

Nobuyuki Odagiri

Ryuji Sawaoka

Toshio Muraki

Tokuo Tazaki

Masazumi Tokunou

A woven fabric prepreg comprising at least &lsqb;A&rsqb; a woven fabric as reinforcing fibers, &lsqb;B&rsqb; a thermosetting resin or thermosetting resin composition and &lsqb;C&rsqb; fine particles of a resin and having a cover factor of 95% or more, and a honeycomb sandwich panel, comprising skin panels fabricated by said woven fabric prepreg and &lsqb;D&rsqb; a honeycomb core can be obtained. The woven fabric prepreg little changes in tackiness with the lapse of time and has moderate drapability, being excellent in self adhesiveness to the honeycomb core when used as skin panels of a honeycomb sandwich panel. Furthermore, the honeycomb sandwich panel obtained has a small porosity in the skin panels fabricated by the cured prepreg and has excellent surface smoothness with few pits and depressions on the surfaces of the skin panels.

Prepreg fabric and honeycomb sandwich panel

Resin compositions for fiber-reinforced composite materials and

A prepreg precursor including a carbon fiber woven fabric having applied to the fabric between about 0.5 to about 10 wt % of a stabilizer material for stabilizing the structural form of the fabric. Prepregs can then be produced using the woven fabric. Undesired settlement of matrix resin from the surface of the woven fabric is thus prevented. Hence, compared with a prepreg prepared using conventional woven fabric, a prepreg prepared by using the woven fabric of the invention can hold its tackiness for a long time and can be used to produce a fiber reinforced composite material excellent in smoothness without being devoid of surface resin.

Woven carbon fiber fabric

Growing community of inventors

Ehime, Japan

Toshiaki Higashi