Title:
LAMINATED FOAM AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JPH04270643
Kind Code:
A
Abstract:
PURPOSE: To obtain a laminated foam consisting of laminated thermoplastic resin foamed sheets with general-purpose applicability and high pressure-resistant strength.
CONSTITUTION: Foamed sheets A1, A2 to be laminated are thermally fused by thrusting a heating rod 12 into specified spots, and holes 1 are formed in a scattered pattern through the entire layers of the foamed sheet. Then the surroundings off these holes 1 become resinified and fused continuously into a cylinder form as a single body. Further, the foamed sheets A1, A2 of this cylinder part 2 are joined together and laminated. Thus the pressure-resistant strength when compressed beyond a certain level is increased.
Inventors:
SUGIMURA SADAO
Application Number:
JP3085491A
Publication Date:
September 28, 1992
Filing Date:
February 26, 1991
Export Citation:
Assignee:
SEKISUI PLASTICS
International Classes:
B32B3/24; B32B5/18; B32B7/02; B32B7/04; B32B37/00; (IPC1-7): B32B3/24; B32B5/18; B32B7/02; B32B7/04; B32B31/14; B32B31/16
Domestic Patent References:
| JPS5136306A | 1976-03-27 | |||
| JPS5493074A | 1979-07-23 |
Attorney, Agent or Firm:
Hitoko Tsuda (1 person outside)