Plywood manufacture using foamed glues

Details Plywood manufacture using foamed glues Plywood manufacture using foamed glues

B - Operations, Transporting

32

B

32/59, 154/96, 1

B32B 7/14 (2006.01) B05C 5/00 (2006.01) B32B 21/14 (2006.01)

Patent

CA 1055832

ABSTRACT OF THE DISCLOSURE Plywood is made by continuously propelling a liquid plywood glue in unfoamed condition at a predetermined flow rate, continu- ously foaming the flue as it is propelled, and continuously ex- truding or otherwise applying the foamed glue to the surface of a plurality of wood veneers. The flow rate of the unfoamed and foamed glue is maintained substantially the same on a unit weight of liquid glue per unit time basis. The veneers then are laid up in- to a plywood assembly and pressed, whereupon the pressure breaks the fo?? and unites the veneers. The method is applicable gener- ally to the production of laminar products by the application of a foamed liquid to a solid surface.

225620

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