Heat and sound insulator of curved corrugated paperboard and...

Details Heat and sound insulator of curved corrugated paperboard and... Heat and sound insulator of curved corrugated paperboard and...

B - Operations, Transporting

32

B

154/80, 154/72.1

B32B 1/00 (2006.01) B29C 53/04 (2006.01) B29C 70/46 (2006.01) B29D 24/00 (2006.01) B32B 3/28 (2006.01) B32B 37/00 (2006.01) B32B 37/16 (2006.01) B60R 13/02 (2006.01) B63B 3/68 (2006.01) E04C 2/32 (2006.01) B60R 13/08 (2006.01)

Patent

CA 1076014

Abstract A plane plate of corrugated paperboard, which is produced by bonding a corrugated medium and at least one liner board with a thermoplastic resin, is shaped into a curved plate by means of n hot-press so that the resin fluidifies and allows the medium and each liner board to make individual and slipping movements during press-forming. The resin hardens upon subse- quent temperature reduction and affords the curved heat and sound insulator plate a good shape retentivity.

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