摘要
以水曲柳为薄木原料,三聚氰胺甲醛树脂(MF)为浸渍液体,研究了薄木的浸渍工艺,包括不同干燥温度、干燥时间、固化剂添加量以及耐磨剂种类和添加量;通过树脂含量、挥发物含量和预固化度3个主要指标评价了不同浸渍工艺生产的浸渍薄木的性能,结合浸渍薄木贴面后的表面耐磨性能,对不同耐磨剂进行了比较。结果表明,当干燥时间一定时,浸渍薄木的挥发物含量随干燥温度的上升呈下降趋势,浸渍薄木的预固化度随着干燥温度的上升而增大。在一定的干燥温度和固化剂条件下,干燥时间越长,挥发物含量越低,预固化度越高。其他条件不变,固化剂施加量越大,浸渍薄木的挥发物含量越低,预固化度越高。使用氧化铝作为耐磨剂的效果优于铝粉,比纯MF浸渍的耐磨性能提高了3.8倍,虽然贴面后的耐磨性能比耐磨纸差,但达到了浸渍纸层压木质地板家用Ⅱ级标准。研究表明,参照浸渍纸工艺生产浸渍薄木是可行的,采用添加3‰固化剂、干燥温度120℃、干燥时间120 s和氧化铝为耐磨剂(添加量为35 g/m2)的工艺时,产品性能最优。
Overlaid with veneers is one of the commonly used surface decoration methods for wood-based panels,which can not only protect the substrate,but also increase the added value of the product.Compared with the impregnated paper overlay,it is usually necessary to carry out secondary treatment of painting after the veneer is overlaid.If the impregnated veneer is processed with the procedure of the impregnated paper,the advantages of the veneer decoration and the impregnated paper overlay can be combined.Impregnating process of thin veneers of manchurian ash(Fraxinus mandshurica)with melamine formaldehyde resin includes the variety of drying temperature,drying time,addition of different curing agents and amount of wear-resisting agent were investigated in this study.The properties of thin veneers with melamine formaldehyde resin were evaluated by the resin content,volatile content and pre-curing degree.Different wear-resistant agents were compared by surface abrasion resistance after overlaid the impregnated veneer.The results showed that the volatile content of thin veneers with melamine formaldehyde decreased with the increase of drying temperature,and the pre-curing degree increased with the increase of drying temperature,when the drying time remained constont.The volatile content of thin veneers with melamine formaldehyde decreased with the increase of drying time,and the pre-curing degree increased with the increase of drying time,when the drying temperature and addition of curing agent remained constont.With the increase of the amount of curing agent,the volatile content of thin veneers with melamine formaldehyde decreased and the pre-curing degree increased,when other conditions remained constont.The use of aluminum oxide as a wear-resistant agent was superior to the aluminum powder,which was 3.8 times than the pure MF impregnation.Although the wear resistance after overlaying impregnated veneer with aluminum oxide was worse than that of the wear-resistant paper,it reached the requirement of laminate flooring.Th
作者
汤正捷
詹先旭
杨勇
闫文雯
徐信武
TANG Zhengjie;ZHAN Xianxu;YANG Yong;YAN Wenwen;XU Xinwu(College of Materials Science and Engineering,Southwest Forestry University,Kunming 650224,China;Dehua TB New Decoration Materials Co.Ltd.,Deqing 313200,Zhejiang,China;College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China)
出处
《林业工程学报》
北大核心
2018年第6期32-37,共6页
Journal of Forestry Engineering
基金
浙江省重点研发计划项目(2017C01117)。
关键词
薄木贴面
浸渍工艺
三聚氰胺甲醛树脂
表面耐磨性
overlaid thin veneers
impregnating
melamine formaldehyde resin
wear resistance
