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一、TFA填料的组成及技术指标 密封填料应具有弹性和抗磨性。对一种密封填料的评价好坏,关键在于这两项指标是否能满足使用要求。 碳纤维增强聚四氟乙烯自润滑密封填料(简称TFA填料)是以石棉绳和碳纤维增强的聚四氟乙烯组成。原来使用的聚四氟乙烯具有较好的耐低、高温性能(可在180～250℃范围内长期工作)。有突出的化学稳定性。但由于它自身缺乏弹性,因而用作密封填料,有一定的局限性。如我厂三车间主机输入和输出轴用它作动密封,效果不太好。 碳纤维由于本身是乱层石墨结构,不仅具有石墨的自润滑性能,而且有许多指标优于石墨。故用于增强各种基体,制得相应的复合材料。
First, the composition of TFA filler and technical indicators Sealed filler should be flexible and wear resistance. Evaluation of a sealed packing is good or bad, the key is whether these two indicators can meet the requirements. Carbon fiber reinforced PTFE self-lubricating sealing filler (referred to as TFA filler) is made of asbestos rope and carbon fiber reinforced PTFE composition. The original use of PTFE has good low resistance, high temperature performance (in the range of 180 ~ 250 ℃ long-term work). Prominent chemical stability. However, due to its own lack of flexibility, which is used as a sealing filler, there are some limitations. If I plant three host input and output shaft with its action seal, the effect is not very good. Carbon fiber itself is a random graphite structure, not only has the self-lubricating properties of graphite, and there are many indicators superior to graphite. It is used to enhance a variety of substrates, obtained the corresponding composite materials.