Toray Industries, Inc.

Kousuke Yoshimura

Makoto Endo

Toshihide Sekido

Takao Sano

Hiroshi Odani

Yutaka Ochi

Toshihiro Ito

Shintaro Tanaka

Toru Kato

Atsushi Ochi

Kimio Mitani

A sound-proof wall made of FRP in the form of a sound-proof wall panel that includes a core and skin members made of FRP positioned on both sides of the core and whose weight per nit area is within the range of 10-60 kg/m; and a method of producing the same. This sound-proof wall, though light in weight, has a superior sound insulation property and will never corrode because it is made of FRP. Further, it has a high degree of freedom of engineering design including sound-proof property, design, and shape, capable of producing a desired sound-proof wall with case. Further, since it has a high specific strength, it is possible to attain a drastic weight reduction while retaining the necessary strength, and facilitate working, shorten construction time, and reduce construction cost.

Sound-proof wall made of FRP, and method of producing the same

A continuous precursor fiber bundle for manufacture of carbon fibers comprising a plurality of precursor fiber bundles each of which comprises at least 30,000 filaments, having a joined portion formed by joining at the terminal end of one of the precursor fiber bundles and the starting end of another one of the fiber bundles directly or through an intervening fiber bundle comprising a plurality of filaments, wherein the individual filaments at the joined portion are substantially uniformly interlaced with each other and wherein the interlacing of filaments is in a pattern selected from the group consisting of continuous substantially uniform interlacing in the transverse direction of said fiber bundles, interlacing at many joints on the joining portion, and interlacing of the entire face of said joining portion.

Precursor fiber bundle for manufacture of carbon fiber, manufacturing apparatus and method of manufacturing carbon fiber bundle

Growing community of inventors

Otsu, Japan

Kousuke Yoshimura