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CELLULOSE GYPSUM BASED SUBSTRATE WITH INCREASED WATER RESISTANCE AND STRENGTH BY SURFACE APPLICATION OF POLYMERIC DIPHENYLMETHANE DIISOCYANATE
CELLULOSE GYPSUM BASED SUBSTRATE WITH INCREASED WATER RESISTANCE AND STRENGTH BY SURFACE APPLICATION OF POLYMERIC DIPHENYLMETHANE DIISOCYANATE
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机译:聚合物二苯二甲撑二异氰酸酯的表面应用增加了耐水性和强度的纤维素石膏基基质
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摘要
The disclosed invention consists of an improved gypsum based, cellulosic containing board and method for applying a resin to an untreated board at a spray station where pMDI resin is sprayed onto the front and back side of the board. A resin distribution system is used to supply the spray nozzles with pMDI. Optionally, a second spray station is included, if desired, to add additional pMDI resin over the surface of the board to achieve complete coverage. The improvement is an increased water resistance and flexural strength.
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