B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
154/96
B32B 21/00 (2006.01) B32B 21/13 (2006.01) C08G 16/02 (2006.01) C08L 61/10 (2006.01) C08L 97/00 (2006.01) C08L 97/02 (2006.01) C09J 5/06 (2006.01) C09J 161/00 (2006.01) C09J 161/06 (2006.01)
Patent
CA 1153294
ABSTRACT OF THE DISCLOSURE A method of bonding wood plies to form plywood panels is disclosed. The method utilizes resins produced from wood chemicals rather than solely utilizing a resin from non renewable petrochemical sources. In the method a water soluble phenol formaldehyde resole resin in liquid form having a pH of at least about 9 is applied to at least one bonding surface between the plies. Methylolated kraft lignin organic solids in a liquid form having a pH of at least about 10 is applied to at least one bonding surface between the plies, wherein the methylolated kraft lignin organic solids are up to about 60% by weight of the total phenol formaldehyde resole resin and methylolated kraft lignin organic solids applied to at least one bonding surface. The plies are sandwiched to- gether and subjected to pressure and heat simultaneously to bond the plies together to form plywood panels.
344464
Fetherstonhaugh & Co.
Macmillan Bloedel Limited
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