ZOR TUTUSABILEN CUBUK CEKME GOEVDELERI,BILHASSA CUBUK CEKME PLAKALARI ILE ZOR TUTUSABILEN,KONTRPLAK KAPLANMIS VEYA SIVANMIS CEKME CUBUK PLAKALARI,BUNLARIN IMALINE MAHSUS BIR USUL VE BUNLARIN KULLANILMASI

摘要

The disclosure relates to difficultly flammable wooden articles, especially chip boards comprising solid and pipe boards, prepared by extrusion from wooden chips and/or woody fibrous materials. The articles contain as a flame-retarding addend a product of (a) 50 to 99.5 weight % of a flame-retarding agent physically and chemically stable under extrusion conditions, preferably 75 to 99.5 weight % of a pulverulent, free-flowing ammonium polyphosphate of the general formula H(n-m)+2(NH4)mPnO3n+1 in which n stands for a whole number with an average value of about 20 to 800 and the ratio of m/n is about 1, and (b) about 0.5 to 50 weight % of a cured water-insoluble artificial resin encapsulating the individual particles of the flame-retarding agent or ammonium polyphosphate. The disclosure also relates to difficultly flammable boards veneered with wood or a laminate.