An impact of surface spray and pressing temperature on the properties of high density fibreboards
| Autor: | Grzegorz Kowaluk, Conrad M. Sala |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Annals of WULS, Forestry and Wood Technology. 112:36-53 |
| ISSN: | 2719-6518 1898-5912 |
| DOI: | 10.5604/01.3001.0014.7355 |
| Popis: | An impact of surface spray and pressing temperature on the properties of high density fibreboards. The objective of this study was to investigate the effects of chosen process parameters: water spray amount and 3rd press heating section temperature on the mechanical, physical properties of ultrathin (2.5 mm) industrial high-density fibreboards (HDF) produced with 5% of recovered HDF (rHDF) addition. Boards were produced with 0 ml/m2 – V0, 8 ml/m2 – V8, 16 ml/m2 – V16 and 32 ml/m2 – V32 of surface water spray addition on top and bottom side in industrial hot continuous press with 3rd heating section temperature setups: 145oC (V45), 160oC (V60) and 175oC (V75). After variants examination with different surface water spray amount it was found, that there is roughly linear positive correlation for MOR increase for up to 10% comparing V0 to V32 and for surface roughness decrease for up to 31%. Surface water spray improved IB for up to 21% while WA decreased for up to 9% for V8 comparing to HDF produced without surface water spray addition. According to 3rd press heating section temperature influence – MOR and MOE has increased while other mechanical properties worsen with pressing temperature increase – drop in IB and SS. |
| Databáze: | OpenAIRE |
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