Mihulja Goran, Poljak Dominik, Sedlar Tomislav
Faculty of Forestry and Wood Technology, University of Zagreb, 10000 Zagreb, Croatia.
Drvodjelac d.o.o., 42240 Ivanec, Croatia.
Polymers (Basel). 2023 Aug 6;15(15):3318. doi: 10.3390/polym15153318.
Steaming beech wood is one of the most commonly used eco-based processes for wood color equilibration. In addition to color equalization, steaming has also been noticed to stabilize the final product (solid wood panels). The beech wood samples used in this study were steamed for two different periods. PVAc and polyurethane (PU) adhesives were used to analyze bonding strength and durability. The bonding strength was measured according to the EN 13354 standard. The samples were treated before testing according to the first part of the standard, i.e., immersion in water. The durability of the bonded joint was tested according to the ISO 9142 standard. The samples were treated before testing with two methods. The results of the bonding strength show the influence of the steaming process on the bonded joint. Short exposure to steam decreased bonding strength, and prolonged exposure increased bonding strength. From the results given and the statistical analysis, it can be concluded that a prolonged steaming period increases the stability of the beech wood and thus the durability of the bonded joints.
蒸汽处理山毛榉木是木材颜色均衡最常用的基于生态的工艺之一。除了颜色均衡外，人们还注意到蒸汽处理能使最终产品（实木板材）更加稳定。本研究中使用的山毛榉木样本进行了两个不同时长的蒸汽处理。使用聚醋酸乙烯酯（PVAc）和聚氨酯（PU）胶粘剂来分析粘结强度和耐久性。粘结强度根据EN 13354标准进行测量。在测试前，样本按照标准的第一部分进行处理，即浸入水中。粘结接头的耐久性根据ISO 9142标准进行测试。在测试前，样本用两种方法进行处理。粘结强度的结果显示了蒸汽处理工艺对粘结接头的影响。短时间蒸汽暴露会降低粘结强度，而长时间暴露则会增加粘结强度。从给出的结果和统计分析可以得出结论，延长蒸汽处理时间会提高山毛榉木的稳定性，从而提高粘结接头的耐久性。
