脲醛树脂凝胶再生研究

Study on regeneration of ureaformaldehyde gel

选用正交L9(33)试验研究了脲醛树脂凝胶的再生树脂,分析试验结果得出了脲醛树脂凝胶的再生树脂的最佳工艺条件:甲醛(37%)与树脂凝胶质量比为2·5∶1,再生树脂的甲醛与尿素终物质的量比1·3∶1。并应用此条件制取的再生树脂压制杨木多层板,胶合强度达到Ⅱ类板要求。

By using the othogonal test of L9（3^3） , the regeneration of ureaformaldehyde gel, was studied and the optimum operation conditions were determined：the mass ratio of formaldehyde（37 % ） to gels is 2.5：1, the final motar ratio of regenerative resin is 1.3：1 （F：U）. Bond strength of poplar plywood pressed inlaboratory achieved Ⅱ grade.