Title:
METHOD FOR CONTROLLING EXPANSION RATIO OF FOAMED THERMOPLASTIC ELASTOMER, EXPANSION MOLDING OF THERMOPLASTIC ELASTOMER AND FOAMED THERMOPLASTIC ELASTOMER
Document Type and Number:
Japanese Patent JP3199951
Kind Code:
B2
Abstract:
PURPOSE: To enable the control of expansion ratio of a foamed material in the foaming of a thermoplastic elastomer using water as a foaming agent preferable from the viewpoint of environment and cost by varying the melt ductility of the thermoplastic elastomer.
CONSTITUTION: The expansion ratio of a foamed material is controlled in the foaming of a thermoplastic elastomer using water as a foaming agent by varying the melt ductility of the thermoplastic elastomer in a fluidized or plasticized state at the stage to generate or expand bubbles with steam preferably by adding a melt-ductility improving agent or varying the expansion foaming temperature. Concretely, e.g. in the case of using a polymer blend of PVC and a nitrobutadiene rubber as the thermoplastic elastomer, the expansion ratio of the elastomer can be varied by adding a polymer blend of polymethyl methacrylate and PVC as the melt-ductility improving agent.
Inventors:
Toshikazu Ito
Youichi Hirai
Youichi Hirai
Application Number:
JP7606294A
Publication Date:
August 20, 2001
Filing Date:
April 14, 1994
Export Citation:
Assignee:
Tokai Kogyo Co., Ltd.
International Classes:
C08J9/12; B29C47/00; B29K27/06; B29K105/04; (IPC1-7): C08J9/12; B29C47/00
Domestic Patent References:
| JP673222A | ||||
| JP58149937A | ||||
| JP6026029A | ||||
| JP51123275A | ||||
| JP6507128A |
Attorney, Agent or Firm:
Hidehiko Okada (2 outside)