Wallboard made from gypsum and plastic facing material

Details Wallboard made from gypsum and plastic facing material Wallboard made from gypsum and plastic facing material

B - Operations, Transporting

32

B

154/69

B32B 13/12 (2006.01) B32B 31/12 (1985.01)

Patent

CA 1189434

ABSTRACT This invention relates to a new improved gypsum wallboard product and to a novel method of making the improved gypsum wallboard product. The gypsum wallboard product comprises a gypsum core substantially enclosed within a water vapour permeable synthetic polymeric sheeting. The invention also relates to a process for the preparation of a gypsum wallboard product comprising spreading a fluid gypsum hemihydrate slurry between two substantially parallel vapour permeable polymeric sheets and allowing the gypsum hemihydrate to set and bond to the sheets.

396368

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