醋酸乙烯酯共聚乳液/异氰酸酯木材胶粘剂胶接工艺与性能的研究

采用正交实验法,研究了以醋酸乙烯酯(VAc)共聚乳液为主剂、多亚甲基多苯基多异氰酸酯(PAPI)为交联剂的双组分木材胶粘剂的胶接工艺与性能。研究结果表明,在常温下,PAPI用量对胶接性能的影响最显著,其次是加压时间,淀粉用量和压力对其影响不显著。综合考虑产品质量和生产成本,确定集成材生产的最佳工艺为:w(PAPI)=15%、加压时间为15min、w(淀粉)=5%和压力为2MPa;由此制得的集成材具有优良的胶接性能和耐水性能,能够满足日本集成材检测标准和室内非结构集成材用胶标准,其应用前景非常广阔。

Study on bonding technology and performance of vinyl acetate copolymerize emulsion/isocyanate adhesive for wood

With vinyl acetate(VAc) copolymerize emulsion as main agent and polyaryl polymethylene for wood were studied by orthogonal experiment method. The research results showed that the effect of PAPI content was most prominent on bonding performance at the normal temperature,the stress time was secondly,the effects of starch content and stress were non obvious on bonding performance.In view of product quality and producing cost,the producing technics of glulam was optimum when the mass fraction of PAPI and starch...