Sumitomo Rubber Industries Limited

Kao Corporation

Nitto-denko Corporation

Fuji Latex Co., Ltd.

Akihito Kuga

Yasuyuki Tanaka

Masaharu Hayashi

Shinichi Nakade

Eiji Kanamaru

Toshiaki Sakaki

Kenichi Ikeda

Kazuhiko Shibata

Atsuko Ochi

Yuji Nishida

Kazuhiro Sekiguchi

Process for preparing deproteinized natural rubber latex molding and

There are provided a deproteinized natural rubber latex which comprises a purified product of proteolytically treated natural rubber latex and contains fine particles of natural rubber latex, a deproteinized natural rubber which comprises a dehydrated product of the deproteinized natural rubber latex, and a process for the production of deproteinized natural rubber latex which comprises subjecting a latex solution prepared by (1) adding water and/or a surfactant to a natural rubber latex and then proteolytically treating the resulting latex solution or (2) proteolytically treating a natural rubber latex and then adding water and/or a surfactant to the treated natural rubber latex, to purification using a rotary plate membrane separation apparatus. The deproteinized natural rubber latex contains substantially no protein, is excellent in film-forming property, and provides a raw rubber film having excellent green strength, and the process can produce the deproteinized natural rubber latex in a high yield with high production efficiency.

Deproteinized natural rubber latex and its production process

Growing community of inventors

Tochigi, Japan

Akihito Kuga