Title:
【発明の名称】平滑な一体のスキン層を有する微細細胞質のフォームプラスチック材料を製造する方法及び装置
Document Type and Number:
Japanese Patent JPH01500583
Kind Code:
A
Abstract:
The present invention is directed to the continuous production of microcellular plastic web material having integral unmodified laminar skin. In accordance with the invention a web of plastic material impregnated with an inert gas is delivered continuously to a degassing device in which the degree to which gas diffuses out of the surfaces of the web can be selectively and continuously controlled, whereupon the web enters a foaming station where it is reheated to induce foaming. The temperature of the reheated web and the duration of the foaming process prior to quenching are also selectively controllable to produce the desired web characteristics. The gas-impregnated plastic web can be produced initially by any of several novel means including a continuous device for impregnating a previously formed web and several versions of die devices which operate either by rapidly quenching the extruded gas-impregnated plastic material before any significant foaming has occurred or by maintaining the material above its foaming pressure within the die until the material has cooled to below the temperature at which foaming occurs.
Inventors:
Hardenbrook, Scott Burton
Halla Star, Louis Paul, Junior
Faulken Barry, Stephen Tennant
Bomba, Richard Dominique
Halla Star, Louis Paul, Junior
Faulken Barry, Stephen Tennant
Bomba, Richard Dominique
Application Number:
JP50635087A
Publication Date:
March 01, 1989
Filing Date:
January 19, 1988
Export Citation:
Assignee:
Eastman Kodak Company
International Classes:
B29C47/00; B29C44/00; B29C44/06; B29C44/34; B29C44/50; B29C44/56; B29K105/04; (IPC1-7): B29C47/00; B29C67/22; B29K105/04
Attorney, Agent or Firm:
Kyozo Yuasa (4 outside)