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Production and characterisation of wood-fibre insulation boards (WFIB) from hardwood fibres and fibre blends
Wood Material Science & Engineering ( IF 2.2 ) Pub Date : 2021-08-01 , DOI: 10.1080/17480272.2021.1958919
Arne A. P. Imken 1 , Redelf Kraft 2 , Carsten Mai 1
Affiliation  

ABSTRACT

Due to the rapid decline in coniferous (softwood) stands in Europe, the wood-based panel industry will be forced to adapt its products to the wood market supply. The production of wood fibre insulation boards (WFIB), which are usually made with softwood fibres, must therefore be converted to the use of hardwood fibres. The objective of this study was to investigate the properties of WFIB made from hardwood fibres and blends of softwood and hardwood fibres produced in a refiner by thermo-mechanical pulping (TMP). WFIB with a raw density of 100 kg m−3 were produced in a dry process with hot-air and hot-steam. The binder used was polymeric diphenylmethane diisocyanate (pMDI, 5 wt% related to the weight of dry fibre material) for stiff boards or 7 wt% bi-component (Bico) fibres for flexible mats. Mechanical strength results for pure hardwood fibres were significantly lower than for softwood fibres and for fibre blends, while water absorption was significantly higher. However, the thermal conductivity for pure hardwood fibres was higher than for softwood fibres and for fibre blends. The results showed that it is possible to produce WFIB from hardwood fibres with satisfactory properties. WFIB made from hardwood fibre blends with at least 20% softwood fibre content showed comparable results to those made from pure softwood fibres.



中文翻译:

用硬木纤维和纤维混合物生产和表征木纤维绝缘板 (WFIB)

摘要

由于欧洲针叶树(软木)林的快速减少,人造板行业将被迫调整其产品以适应木材市场供应。因此,通常由软木纤维制成的木纤维保温板 (WFIB) 的生产必须转而使用硬木纤维。本研究的目的是研究由硬木纤维以及在精磨机中通过热机械制浆 (TMP) 生产的软木和硬木纤维混合物制成的 WFIB 的特性。原始密度为 100 kg m −3的 WFIB采用热空气和热蒸汽的干燥工艺生产。使用的粘合剂是用于硬板的聚合二苯甲烷二异氰酸酯(pMDI,占干纤维材料重量的 5 wt%)或用于柔性垫的 7 wt% 双组分 (Bico) 纤维。纯硬木纤维的机械强度结果明显低于软木纤维和纤维混合物,而吸水率明显更高。然而,纯硬木纤维的导热系数高于软木纤维和纤维混合物。结果表明,可以用硬木纤维生产性能令人满意的 WFIB。由含有至少 20% 软木纤维的硬木纤维混合物制成的 WFIB 显示出与由纯软木纤维制成的结果相当的结果。

更新日期:2021-08-01
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