Kao Corporation

Asahi Glass Company, Limited

Agc Inc.

Yoshino Kogyosho Co., Ltd.

Hiroyuki Okawa

Yusuke Kobayashi

Hiroshi Mizushima

Makoto Sano

Nobuhiro Nakamura

Kenji Imakita

Nobutaka Aomine

Kazutaka Hayashi

Kazunobu Maeshige

Kiyoshi Tamai

Shinichi Inaba

Nao Ishibashi

Kazuhiko Yamanaka

Hitoshi Onoda

Tetsuhiro Osawa

The present invention provides a cover glass and a glass laminate which are reduced in warpage, and have excellent scratch resistance, low reflecting properties and excellent optical properties. According to the present invention, a cover glass and a glass laminate which are reduced in glass warpage, retain the effect of scratch resistance, and have low reflecting properties and excellent optical properties can be provided by alternately superposing a film including a high-refractive-index material and a film including a low-refractive-index material, in given amounts.

Cover glass and glass laminate

A chemically strengthened glass is disposed on a base, and an impacting object is dropped from above in a state where one surface of the chemically strengthened glass is in contact with an abrasive surface of a sandpaper containing an abrasive having a size of not smaller than a depth of a compressive stress layer.

Method for impact-testing chemically strengthened glass, method for reproducing cracks in chemically strengthened glass, and method for manufacturing chemically strengthened glass

A container has a valve (2) and a lid (3) which covers the valve (2) from the outside. The valve (3) includes a slit (23) which opens due to outward deformation of the valve (3) when the internal pressure of the body (1) is higher than atmospheric pressure, and which closes due to elasticity of the valve (3) when the internal pressure is approximately equal to atmospheric pressure. The container of the present invention further comprises a pushing structure (4) formed on the inside of the lid (3), this pushing structure (4) being shaped so as to come into contact with the valve (2) when the lid (3) is shut, thereby pushing the valve (2) slightly inwards to open the slit (23).

Container having slit valve

Growing community of inventors

Tokyo, Japan

Hiroyuki Okawa