Patent ID: 6767490
Filing Date: 2004-07-27
Classification: B27N,B32B,Y10T

Abstract:
A method of producing a strand board having an average density of between 450 and 550 kg/m3 comprising: conditioning a first set of strands to a moisture content of between 20 and 50% based on the dry weight of said strands and coating a bonding resin to the surfaces of said strands to provide a first set of resinated strands, conditioning a second set of strands to a moisture content of between 2 to 15%, based on the dry weight of strands in said second set of strands and coating a bonding resin to the surfaces of said strands of said second set of strands to provide a second set of resinated strands, forming a mat lay-up having a core layer formed of said second set of resinated strands sandwiched between a pair of surfaces layers each formed from said first set of resinated strands, pressing said mat lay-up between heated platens to form a consolidated panel having an average density of between 450 and 550 kg/m3, said pressing including closing said platens to the thickness of said consolidated panel in less than 30 seconds and raising temperature of said core layer to 100Â° C. in less than 35 seconds without increasing the core gas pressure above 0.17 MPa.