WALLBOARD MADE FROM GYPSUM AND PLASTIC FACING MATERIAL

摘要

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.