Composite paper hardboard panel and method of making same

Details Composite paper hardboard panel and method of making same Composite paper hardboard panel and method of making same

B - Operations, Transporting

32

B

154/97

B32B 21/02 (2006.01) B27N 1/00 (2006.01) B27N 3/06 (2006.01) B32B 21/06 (2006.01) C08K 5/04 (2006.01)

Patent

CA 1069034

ABSTRACT OF THE DISCLOSURE A composite dry process hardboard includes a hardboard panel consisting of pressed defibrated and refined wood chips, plus a surface layer of paper cemented to the hardboard by a cured resin made from phenolic resin mixed with water and ethylene glycol. If desired, an embossed pattern may be incorporated into pressing the paper overlay. In the subject process, first a mass of defibrated wood chips is mixed with a binding agent, the mass is then formed into a mat which is coated with a mixture of phenolic resin and a polyhydric compound such as a polyhydric alcohol having a boiling point higher than water. Then, a dry sheet of paper is laid on the mat and the composite structure is then cured by the application of heat and pressure.

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