Nissan Motor Company Limited

Daicel Corporation

Marui Industry Co., Ltd.

Taiji Yamabe

Takeo Tamura

Tadashi Takeuchi

Mirror using transparent synthetic resin plate

A mirror which utilizes a transparent synthetic resin such as a polymethyl methacrylate resin in place of glass and is suitable, e.g., as an automobile inside rearview mirror. The back side of the resin plate is coated with a reflective metal film by vacuum deposition, and at least the front side of the resin plate is coated with a surface-hardening film, which is inevitably somewhat permeable to humidity. To prevent warping of the resin plate resulting from its moisture absorption and swelling only in its front region, the reflective film and a back-coat layer covering this film are both made permeable to humidity substantially equally to the surface-hardening film. Preferred material for the reflective film is a Sn--Cu--Cr ternary alloy having high reflectivity and excellent resistance to moisture.

A low-loss optical fiber core for optical communications is covered with at least one layer of a polylaurolactam copolymer composed of 20 to 98 parts by weight of laurolactam and 80 to 2 parts by weight of a polyamide-forming monomer other than laurolactam, said copolymer having a melting point within a range of 100.degree. C. to 170.degree. C.

Growing community of inventors

Yokohama, Japan

Taiji Yamabe