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胶合板预压工艺是胶合板在热压前预先经过短时间的冷压,在树脂不固化的情况下,使板坯牢固粘住。因此,热压时无需用金属垫板,有利于提高生产连续化程度,改善劳动条件,降低劳动强度;提高劳动生产率,降低成本,并能防止芯板滑动,保证产品质量。1973年中国农林科学院和上海木材一厂协作,首先进行了预压胶及预压工艺的试验。1975年和1976年在上海木材一厂、长春胶合板厂、绥化木材综合加工厂先后进行了车间大型试验,并逐步被我国的胶合板工业所采用。
Plywood pre-press process is plywood before pressing in advance after a short period of cold, the resin is not cured, so that the slab firmly stick. Therefore, the hot pressing without the need for metal plate is conducive to improving the level of production continuity, improve working conditions and reduce labor intensity; improve labor productivity and reduce costs, and to prevent the core sliding to ensure product quality. In 1973, the Chinese Academy of Agriculture and Forestry and the Shanghai Timber Factory collaborated. The experiments of pre-pressing and pre-pressing were carried out firstly. 1975 and 1976 in Shanghai Timber Factory, Changchun plywood factory, Suihua integrated wood processing plant has carried out large-scale workshop, and gradually being used by China’s plywood industry.