Abstract: Non-inflammable light-weighing tough boards to be used for structural and decorative material in housing and building, such as, decorative ceiling boards, sliding door overlays, partitions and so on, prepared by corrugating cardboard made of phosphated wood pulp and inorganic fiber and processing the so obtained corrugated board by impregnating with a toughening solution of inorganic toughening agent and then drying it.
Type:
Grant
Filed:
July 31, 1989
Date of Patent:
January 22, 1991
Assignees:
Keisuke Ueno, United Board Co., Ltd., K. S. Consult Service Co., Inc.