真空包压敏耐高温(200℃)密封胶条研制

Study of pressure-sensitive high-temperature-resistant(200℃)sealant tape for vacuum bagging

使用丁基橡胶、酚醛硫化剂、氧化钙、聚异丁烯和滑石粉为原料,制备真空包压敏耐高温(200℃)密封胶条,研究了各原料对密封胶条性能的影响。结果表明,制备的密封胶条有较好的力学性能、密封性能和耐高温性能。室温拉剪强度>0.17 MPa,拉断伸长率>700%,200℃、6 h加热后室温拉剪强度为0.19~0.35 MPa,高温使用后室温剥离不留残余。200℃真空包固化12 h内不泄漏,抽真空压强接近0.1 MPa。

The pressure-sensitive high-temperature-resistant（200 ℃） sealant tape for vacuum bagging was prepared successfully by using the butyl rubber, phenolic vulcanizing agent, CaO, polyisobutylene and talc as the raw materials, and the effect of raw materials on the properties of sealant tape was studied. The results showed that the sealant tape had good mechanical and sealing properties. The lap tensile shear strength at room temperature was over 0.17 MPa, the elongation at break at room temperature was over 700%, the tensile tear strength at room temperature was between 0.19 - 0.35 MPa after heating at 200 ℃ for 6 h, and when room temperature peeling there was no residue after high temperature use. The vacuum bagging had no leak at 200 ℃ for 12 h when the exhausted pressure remained about 0.1 MPa.