Mitsubishi Rayon Company, Limited

Seiko Epson Corporation

Akira Motonaga

Hiroshi Fukushima

Jun Kamo

Hiroshi Hosokawa

Kensuke Kamada

Makoto Ookawa

Yukichi Konami

Masao Hamada

Akiyoshi Kogame

Eriko Suda

Mikito Nakajima

Katsuyoshi Takeshita

Yusuke Kutsukake

Susumu Sugitani

In a lens sheet, a lens portion () made of activation energy curing resin such as ultraviolet curing resin has a plurality of lens units, the lens portion () is disposed on at least one side of a transparent substrate () such as plastic sheet, a relaxation layer () is disposed between the transparent substrate () and the lens portion (), and the thickness of the relaxation layer () is within a range of 1% to 30% of the height (H) of the lens units. The relaxation layer () is made of activation energy curing resin and formed integrally with the lens portion (). The refractive index of the transparent substrate () is lower than that of the lens portion (). The lens units are elongated prisms each having a substantially triangular cross section. The thickness of the relaxation layer is within a range of 1 &#x3bc;m to 10 &#x3bc;m, for example. The prisms have the vertical angle of 50&#xb0; to 75&#xb0; and are arranged with a pitch of 10 &#x3bc;m to 150 &#x3bc;m. The lens sheet having the relaxation layer () is obtained by providing activation energy curing composition to an area between a lens portion transferring pattern surface of a lens forming mold and one side of the transparent substrate to form a composition layer between the lens forming mold and the transparent substrate, and making the thickness of the composition layer uniform with use of a nip roll disposed so as to confront the other side of said transparent substrate while nip pressure of the nip roll is regulated by pressure regulating means. Due to the relaxation layer (), the deformation of the surface of the lens portion caused by polymerization shrinkage of the activation energy curing composition is suppressed so as to prevent occurrence of the optical defect in the lens sheet such as spot pattern, glare, etc.

Lens sheet and method of manufacturing the same

In a lens sheet, a lens portion made if activation energy curing resin such as ultraviolet curing resin has a plurality of lens units, the lens portion is disposed on at least one side of a transparent substrate such as plastic sheet, a relaxation layer is disposed between the transparent substrate and the lens portion, and the thickness of the relaxation layer is within a range of 1% to 30% of the height of the lens units. The relaxation layer is made of activation energy curing resin and formed integrally with the lens portion. The refractive index of the transparent substrate is lower than that of the lens portion. The lens units are elongated prisms each having a substantially triangular cross section.

Lens sheet and method for producing the same

Disclosed herein is a polybutylene glycol dimethacrylate which provides various kinds of plastics having good flexibility and low water absorption. Disclosed also herein is a resin composition for cast polymerization which provides molded products which have high heat resistance, good flexibility, and low water absorption, without sacrificing impact resistance and surface hardness. They will find use as optical materials, lenses, etc.

Polybutylene glycol dimethacrylate and resin composition for cast

Composition for plastic lenses

Disclosed is a membranous gas separator comprising (a) a porous substrate having an average pore diameter of not greater than 100 .ANG. and (b) a .pi.-electron conjugated conducting polymer retained within at least a part of the pores of the porous substrate in such a way that the pores are not blocked characterized in that retaining the .pi. -electron conjugated conducting polymer within the pore is carried out by a chemical oxidative polymerization.

Membranous gas separator

Disclosed is a process for preparing a membranous gas separator comprising (a) a porous substrate having an average pore diameter of not greater than 100 .ANG. and (b) a .pi.-electron conjugated conducting polymer retained within at least a part of the pores of the porous substrate in such a way that the pores are not blocked, characterized in that retaining the .pi.-electron conjugated conducting polymer within the pore is carried out by a chemical oxidative polymerization.

Process for preparing a membranous gas separator

Growing community of inventors

Nagoya, Japan

Akira Motonaga