一、概述由胶粘原理知道:极性胶粘剂对极性材料胶粘时,胶粘强度最高.而聚乙烯对金属的胶合采用极性胶粘剂仍达不到要求,这主要是由于聚乙烯的特殊性能所造成的.聚乙烯为非极性塑料,常温下系白色固体.结晶度很高,软化点随密度不同而异,一般为105～135℃,具有优良的介电性能,吸水率非常低,室温下能耐大多数酸碱,甚至氢氟酸的腐蚀(但60℃以上铬酸和硫酸 First, an overview by the principle of adhesive know: polar adhesive on the polar material adhesive, the highest adhesive strength.While polyethylene on the metal bonding using polar adhesive is still not up to requirements, mainly due to the special polyethylene Performance polyethylene caused by non-polar plastic, white solid at room temperature high degree of crystallinity, the softening point varies with density, generally 105 ~ 135 ℃, with excellent dielectric properties, water absorption is very low , Most of the acid and alkali resistant even at room temperature, and even the corrosion of hydrofluoric acid (but above 60 ℃ chromic acid and sulfuric acid