Particle board and use thereof
AssigneePerstorp Flooring AB
InventorsRoland Larsson, Peter Ringo
Life of this patent
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Abstract
A particle board including wood particles having a maximum particle size of 3 mm and an average particle size of between 0.2 mm and 2.0 mm. The wood particles are combined with a glue, present in a concentration of 5% to 18% by weight, and 0.1% to 1% by weight of a sizing agent. The particle board components are subjected to a pressure of 15 to 50 kp/cm.sup.2 and a temperature of 120.degree. to 210.degree. C. to produce a particle board having a density of 600 to 1200 kg/m.sup.3 and a water absorption of 14% to 30% by weight, said swelling and absorption measured after 24 hours in water, a bending strength of 18 to 35 MPa and an internal bond strength of 1.2.
Claims13
A particle board comprising wood particles having a maximum particle size of 3 mm and an average particle size of between 0.2 mm and 2.0 mm combined, at a temperature of 10.degree. C. to 30.degree. C., with a glue, present in a concentration of 5% to 18% by weight, calculated as dry glue on dry particles, and 0.1% to 1% by weight of a sizing agent, said components combined into a mat of 1 to 5 layers which is flat pressed, at a pressure of 15 kp/cm.sup.2 to 50 kp/cm.sup.2 and a temperature of 120.degree. C. to 210.degree. C., after, optionally, being prepressed whereby a particle board having a density of 600 kg/m.sup.3 to 1200 kg/m.sup.3, a thickness swelling of 3% to 12%, a water absorption of 14% to 30% by weight, said swelling and absorption measured after 24 hours in water, a bending strength of 18 MPa to 35 MPa and an internal bond strength of 1.2 MPa to 3.2 MPa is formed.
Dependencies are inferred from the claim text.