聚乙二醇改性三聚氰胺甲醛树脂对汽车空气滤纸性能的影响

摘要

In order to manufacture the automobile air filter paper, the base filter paper was impregnated with styrene-acrylic latex containing the cross-linking agent of melamine formaldehyde resin which was modified with polyethylene glycol (PEG). The influence of various proportion of PEG (P), melamine (M) and formaldehyde (F), resin dose, and curing pH value on tensile strength, burst strength, water-resistance and air permeability of automobile air filter paper were investigated. The result showed that the optimum conditions were as follows: molar ratio of P/M 0.32, molar ratio of F/( M-Mp ) 2.8, dose of modified resin 4％ on styrene-acrylic latex solid content, and curing pH value 6 to 7 ( impregnated amount of styrene-acrylic latex 25％ ). The tensile strength of the filter paper was 4.51 kN/m, burst strength was 340 kPa, water-resistance was 39.4 min, and air permeability was 334 L/(m2 ·s) when pH value was 6.%采用聚乙二醇对三聚氰胺甲醛树脂进行改性,改性后的树脂用作交联剂添加到苯丙乳液中,并对汽车工业滤纸原纸进行浸渍加工处理.通过研究聚乙二醇(P)、三聚氰胺(M)、甲醛(F)的不同配比、树脂添加量及固化pH值,探讨了其作为乳液交联剂对汽车工业空气滤纸的抗张强度、耐破度、耐水性、透气度的影响.实验结果表明,当P与M的摩尔比为0.32,F与M-Mp的摩尔比为2.8,改性树脂添加量为苯丙乳液固含量的4%,固化pH值为6-7时,汽车工业空气滤纸的综合性能最佳(苯内乳液的上胶量为25%).当pH值为6时,滤纸的抗张强度为4.51kN/m,耐破度为340 kPa,耐水性为39.4min,透气度为334L(m2·s).