Walkiewicz Joanna, Kawalerczyk Jakub, Mirski Radosław, Dziurka Dorota, Wieruszewski Marek
Department of Mechanical Wood Technology, Faculty of Forestry and Wood Technology, Poznań University of Life Sciences, Wojska Polskiego 38/42, 60-627 Poznań, Poland.
Materials (Basel). 2022 Oct 15;15(20):7201. doi: 10.3390/ma15207201.
The aim of the presented study was to apply various bark species (birch, beech, maple, pine and spruce) as fillers for urea-formaldehyde (UF) resin in three-layer plywood manufacturing. For this purpose, all types of bark were ground and added to the adhesive mixture. The resultant plywood was subjected to investigations of the following: tensile strength, modulus of elasticity (MOE), bending strength (MOR) and formaldehyde emission. The results indicate a reduction in the tensile strength. Moreover, the lack of significant improvement in strength parameters can be explained by too high a load of the filler (20 wt%). In the case of formaldehyde emissions, a reduction was observed for birch (B-1), beech (B-2), maple (B-3) and pine bark (B-4). In addition, an increase in the emission of formaldehyde was recorded only for spruce bark.
本研究的目的是将各种树皮种类（桦木、山毛榉、枫木、松木和云杉）用作三层胶合板制造中脲醛（UF）树脂的填料。为此，将所有类型的树皮磨碎并添加到粘合剂混合物中。对所得胶合板进行了以下研究：拉伸强度、弹性模量（MOE）、弯曲强度（MOR）和甲醛释放量。结果表明拉伸强度有所降低。此外，强度参数缺乏显著改善可以用填料负载过高（20重量%）来解释。在甲醛释放方面，观察到桦木（B-1）、山毛榉（B-2）、枫木（B-3）和松树皮（B-4）的甲醛释放量有所降低。此外，仅云杉树皮的甲醛释放量有所增加。
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