Particleboards from Recycled Thermally Modified Wood

In recent years, the production and consumption of thermally modified wood (TMW) has been increasing. Offcuts other waste generated during TMWs processing into products, as well already disposed products based on can be an input recycled raw material for particleboards (PBs). a laboratory, 16 mm thick 3-layer PBs bonded with urea-formaldehyde (UF) resin were produced at 5.8 MPa, 240 °C 8 s pressing factor. PBs, particles from fresh spruce mixed offcuts pine, beech, ash combined in weight ratios 100:0, 80:20, 50:50 0:100. Thickness swelling (TS) water absorption (WA) decreased increased portion TMW particles, i.e., TS after 24 h maximally about 72.3% WA 64%. However, mechanical properties worsened proportionally higher content TMW—apparently, modulus rupture (MOR) up to 55.5% internal bond (IB) 46.2%, while negative effect elasticity (MOE) was milder. Decay resistance brown-rot fungus Serpula lacrymans (Schumacher ex Fries) S.F.Gray if they contained 45%, mould containing improved only first days test. summary, improve decay exposed humidity environment. worsening their could appear, well.