Nippon Oil Company

Hidetoshi Takagi

Kenichi Aoyagi

Hiroshi Onoda

Kazuo Morohashi

Tetsufumi Ikeda

Kunihiko Sato

A fiber-reinforced composite cylindrical form formed by winding up unidirectional prepreg sheets around a mandrel according to such four patterns as to set the fiber winding angles of the resulting layers thereof at 0.degree., 90.degree., 40.degree. to 50.degree., and -40.degree. to -50.degree. with the longer direction thereof, and then heat-curing said layers of said prepreg sheets.

Fiber-reinforced composite cylindrical form

This invention is to provide a lightweight, inexpensive reflecting mirror. A reflecting layer is formed on the front surface of a carbon fiber-reinforced plastic substrate. An reflecting mirror includes a first substrate consisting of a carbon fiber-reinforced plastics, a reflecting layer formed on the front surface of the first substrate, a second substrate formed on the rear surface of the first substrate, an edge member formed at edges of the first and second substrates, and a foamed body filled in a space defined by the first and second substrates and the edge member. The second substrate and the edge member preferably consist of a carbon fiber-reinforced plastics.

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Yokohama, Japan

Hidetoshi Takagi