Patents Assigned to Lonseal Kogyo Co., Ltd.
  • Process for forming open cell sheet, sheet formed by process, intermediate for forming said sheet and process for forming said intermediate
    Patent number: 4423110
    Abstract: A process for producing an open cell foam. The process comprises mixing a polyvinyl chloride composition, plasticizer, at least one stabilizer, and a foaming agent to form a blend; gelling the blend; forming the gelled blend into a sheet; and heating the sheet to decompose the foaming agent thereby forming the open cell foam. The sheet formed by the process. The process for forming an intermediate used in the process and the intermediate itself.
    Type: Grant
    Filed: March 27, 1980
    Date of Patent: December 27, 1983
    Assignee: Lonseal Kogyo Co., Ltd.
    Inventor: Akira Sato