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通过对大豆粉采用碱处理使大豆蛋白质大分子结构展开,暴露出的官能团进一步与甲醛反应生成稳定的蛋白质,这种物质与苯酚共聚反应生成改性豆基蛋白胶黏剂。采用单因素实验方法,探讨了改性豆基蛋白胶黏剂压制杨木三层胶合板的胶合工艺。分析了热压温度、热压时间和涂胶量对胶合板胶合性能的影响。结果表明:采用改性后的豆基蛋白胶黏剂,在压力为1.4NPa,温度为165℃左右,热压时间为1.4～1.6min·mm~(-1),涂胶量为220g·m~(-2),压制的杨木胶合板胶合性能较佳且达到Ⅰ类胶合板的标准。
The soybean protein macromolecule structure is developed by alkaline treatment of the soybean flour, and the exposed functional groups further react with the formaldehyde to form a stable protein, and the substance is copolymerized with the phenol to generate a modified soy protein adhesive. The single factor experimental method was used to study the gluing process of the modified soybean protein adhesive for pressing three layers plywood. The effects of hot pressing temperature, hot pressing time and the amount of adhesive on the gluing performance of plywood were analyzed. The results showed that with the modified soybean protein adhesive, the pressure was 1.4NPa, the temperature was about 165 ℃, the hot pressing time was 1.4 ~ 1.6min · mm -1, the amount of glue was 220g · m ~ (-2), the pressed poplar plywood has better gluing performance and meets the standard of class Ⅰ plywood.