热处理工艺对PTFE微孔带蠕变性能的影响研究

Study on influence of heat treatment on creep behavior of PTFE microporous zone

以聚四氟乙烯(PTFE)微孔带为研究对象,采用热处理工艺对其进行加工处理,考察淬火温度、退火温度和保温时间等参数对其结晶度与蠕变性能的影响。结果表明:随淬火温度或退火温度的升高,PTFE微孔带的结晶度先增加后减少,蠕变量先减小后增加;当淬火温度为290℃或退火温度为320℃时,微孔带的结晶度最大,蠕变量最小且不易蠕变。淬火和退火工艺相比,后者可赋予PTFE微孔带较好的抗蠕变性能。保温时间越长,PTFE微孔带的结晶度越高,蠕变量越低使得其抗蠕变性能越好。

The effects of quenching temperature,annealing temperature and holding time on the crystallinity and creep properties of PTFE microporous zone were investigated by using PTFE microporous zone as the research object.The results show that with the increase of quenching temperature or annealing temperature,the crystallinity increases first and then decreases,and the creep quantity decreases first and then decreases.When the quenching temperature is 290℃or the annealing temperature is 320℃,the crystalline is the largest,the creep variable is the smallest,and the microporous zone is difficult to creep.Compared with the quenching process,the annealing process can give PTFE microporous zone good creep resistance property.The longer the holding time,the higher the crystallinity,the lower the creep,so the better the creep resistance.