对比国内外拉伸增强管材的生产工艺,借鉴热缩管生产中的布管扩张法,研究开发一整套布管式PVC管材双向拉伸自增强的设备。设备解决了现有扩胀技术存在的缺点,并把非连续扩胀变为连续扩胀。通过实验表明:采用布管内压扩胀法可以得到外观均匀、管径稳定的扩胀管。由于高分子材料的取向作用,管材的环向拉伸强度和拉伸弹性模量都有大幅提高。 Contrasting the production technology of tensile reinforced pipe at home and abroad, drawing on the pipe expanding method in the production of heat-shrinkable pipe, a set of equipment for biaxial stretching self-reinforcing of pipe cloth PVC pipe is researched and developed. Equipment to solve the existing shortcomings of the expansion technology, and discontinuous expansion into a continuous expansion. Experiments show that: using pipe internal pressure expansion method can be uniform appearance, diameter stability of the expansion tube. Due to the orientation of the polymer material, the circumferential tensile strength and tensile modulus of the pipe have greatly increased.