Untersuchungen über das Dauerstandsverhalten formaldehydarmer bzw. formaldehydfrei verleimter Industriespanplatten. Prüfmethoden und Kurzzeiteigenschaften

13 industrial particleboards of emission class 1 were examined. Their low formaldehyde emission potential was reached by several methods, e.g. using special resins, formaldehyde scavengers as well as by subsequent treatment. 6 of these particleboards did not fulfill the requirements according to DIN 68763 regarding the 24 h thickness swelling resp. the bending strength, whereas the required minimum value of the transversal tensile strength partially was considerably exceeded. As far as their density profile is concerned the particleboard could be divided into 4 groups. All particleboards showed low perforator values. Some insignificant exceeding of the limit value of 10 mg/ 100 g dry board results from an increase in moisture due to conditioning of the samples (20/65) prior to testing. The creep behaviour of the particleboards in alternating climate (20/85-20/30) under constant loading was assessed according to the FESYP method.