Daicel Chemical Industries, Ltd.

Daicel Abosisangyo Co.

Polyplastics Co., Ltd.

Yodogawa Sangyo Co., Ltd.

Mikuni Plastics

Yoshio Onisawa

Yoshinobu Yukinaga

Kohei Shimizu

Mitsunobu Haga

Hiroshi Hotta

Atsutoshi Wakabayashi

A plastic lens comprising the first acrylic hard coated layer formed on the outside surface of a plastic lens base and, on the inside surface, an antifogging coated layer while interposing of the second acrylic hard coated layer is obtained by coating both sides of a plastic lens base with an acrylic hard coating agent, masking the outside surface with a peelable masking agent (e.g., a coating composition containing poly(vinyl chloride) or a vinyl chloride-vinyl acetate copolymer), coating at least the inside surface with an antifogging agent, and removing the masking layer. As the hard coating agent or antifogging agent, use can be made of an ultraviolet-curable resin composition, and as the masking agent, a coating composition containing a poly-(vinyl chloride) or vinyl chloride-vinyl acetate copolymer may be employed.

Plastic lenses and method of producing the same

A plastic lens comprising the first acrylic hard coated layer formed on the outside surface of a plastic lens base and, in the inside surface, an antifogging coated layer with interposing of the second acrylic hard coated layer is obtained by coating the both sides of a plastic lens base with an acrylic hard coating agent, masking the outside surface with a peelable masking agent (e.g. a coating composition containing poly(vinyl chloride) or vinyl chloride-vinyl acetate copolymer), coating at least the inside surface with an antifogging agent, and removing the masking layer. As the hard coating agent or antifogging agent, use can be made of an ultraviolet-curable resin composition, and as the masking agent, a coating composition containing a poly(vinyl chloride) or vinyl chloride-vinyl acetate copolymer may be employed.

Improvement in a method for molding a plastic substrate for an optical disk having a concave-convex pattern on a side surface thereof including a step of feeding liquid resin into a molding cavity defined by a pair of mold halves, characterized in that, when the molded plastic substrate is released from the mold halves, the molded plastic substrate is released at least simultaneously in time from both of the mold halves in a mold-opening stage.

Apparatus for molding a formatted substrate for an optical disk

A process for manufacturing a parabolic antenna, which comprises arranging, in an injection mold beforehand, a thin sheet comprising a film layer having good weather resistance and a radio-reflecting layer coated with said film layer, and heat-plasticating a pellet-type thermoplastic resin composition with an injection molding machine to inject into the mold, whereby the parabolic antenna is integrally molded, said pallet-type thermoplastic resin composition comprising a fibrous inorganic filler which has a length substantially the same as a thermoplastic resin pellet and arranged approximately parallel to the longitudinal direction of said pellet.

Growing community of inventors

Hyogo, Japan

Yoshio Onisawa