轿车车门橡胶密封条的脱胶原因及解决措施

Reasons and Solutions for Degumming of Car Door Rubber Sealing Strips

针对轿车车门橡胶密封条的脱胶现象,根据双面胶粘带粘合机理和现场安装经验,分析影响橡胶密封条双面胶粘带粘合的主要因素,并进行橡胶密封条的受热伸长量对比试验。结果表明:脱胶严重的橡胶密封条受热伸长率大于脱胶较轻的橡胶密封条;受热伸长或降温冷缩使橡胶密封条粘合部位的局部剪切力过大,加之车门钣金漆面表面能不满足技术要求,导致了橡胶密封条脱胶现象的发生;橡胶密封条与胶粘带粘合部位增置玻璃纤维绳或提高胶粘带与钣金漆面的粘合力可以有效减少橡胶密封条脱胶现象。

In view of the degumming phenomenon of car door rubber sealing strips,the main factors affecting the adhesion of double-sided adhesive tapes of the rubber sealing strip were analyzed based on the adhesion mechanism of double-sided adhesive tapes and field installation experience,and the comparative test of heated elongation of the rubber sealing strip was carried out.The results showed that the elongation of the rubber sealing strip with severe degumming was greater than that with light degumming.The local shear force of the adhesive part of the rubber sealing strip was too large due to the thermal elongation or cold shrinkage,and the surface energy of the car door sheet metal paint did not meet the technical requirements,which led to the degumming phenomenon of the rubber sealing strip.Adding glass fiber rope at the bonding part of the rubber sealing strip and adhesive tape or improving the adhesive force between the adhesive tape and sheet metal paint surface could effectively reduce the degumming phenomenon of the rubber sealing strip.