B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 13/02 (2006.01) B05B 9/04 (2006.01) B28B 1/32 (2006.01) B32B 5/22 (2006.01) C04B 16/02 (2006.01) E04C 2/04 (2006.01) B05B 15/06 (2006.01)
Patent
CA 2355730
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.
L'invention divulguée a trait à un carton amélioré, contenant de la cellulose, à base de gypse, et à une méthode pour l'application d'une résine sur un carton non traité à une station de pulvérisation où une résine de pMDI est pulvérisée sur la face avant et la face arrière du carton. Un dispositif de distribution de la résine est employé pour alimenter les buses de pulvérisation en pMDI. De manière facultative, une deuxième station de pulvérisation est incluse, si on le souhaite, pour ajouter de la résine de pMDI sur la surface de carton et assurer une couverture complète. L'amélioration est la résistance accrue à l'eau et la résistance à la flexion.
Nelson Christopher R.
Scalf Mark B.
Company United States Gypsum
Gowling Lafleur Henderson Llp
LandOfFree
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