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A polytetrafluoroethylene and fiber technology, applied in the field of polytetrafluoroethylene fibers, can solve the problems of affecting the chemical properties of materials, large linear expansion coefficient, poor thermal conductivity, etc., to improve dimensional stability, increase hardness, and reduce linear expansion coefficient Effect
Active Publication Date: 2017-12-15
JIANGSU WENFENG CHEM FIBER GROUP
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[0003] However, due to the large linear expansion coefficient, low hardness, and poor thermal conductivity of PTFE fibers, the volume of PTFE fibers increases at high temperatures, which affects the coordination between PTFE fibers and other materials. Affects the embodiment of the chemical properties of its materials
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Embodiment 1
[0012] The present embodiment provides polytetrafluoroethylene fiber, including each component of following parts by weight:
[0013] 85 parts of polytetrafluoroethylene, 17 parts of glass fiber, 24 parts of carbon fiber, 5 parts of aluminum oxide, 18 parts of graphite, 11 parts of silicon dioxide, 5 parts of molybdenum disulfide, 9 parts of polyphenylene sulfide, ethyl trimethyl 7 parts of oxysilane, 4 parts of copper powder.
Embodiment 2
[0015] The present embodiment provides polytetrafluoroethylene fiber, including each component of following parts by weight:
[0016] 90 parts of polytetrafluoroethylene, 20 parts of glass fiber, 20 parts of carbon fiber, 6 parts of aluminum oxide, 16 parts of graphite, 8 parts of silicon dioxide, 5 parts of molybdenum disulfide, 8 parts of polyphenylene sulfide, ethyl trimethyl 6 parts of oxysilane, 4 parts of copper powder.
Embodiment 3
[0018] The present embodiment provides polytetrafluoroethylene fiber, including each component of following parts by weight:
[0019] 88 parts of polytetrafluoroethylene, 18 parts of glass fiber, 23 parts of carbon fiber, 4 parts of aluminum oxide, 17 parts of graphite, 10 parts of silicon dioxide, 4 parts of molybdenum disulfide, 8.5 parts of polyphenylene sulfide, ethyl trimethyl 7.5 parts of oxysilane, 5 parts of copper powder.
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Abstract
The invention discloses a polytetrafluoroethylene fiber, which comprises the following components in parts by weight: 80-90 parts of polytetrafluoroethylene, 15-23 parts of fiberglass, 20-24 parts of carbon fiber, 2-6 parts of aluminium oxide, 14-18 parts of graphite, 8-12 parts of silicon dioxide, 3-6 parts of molybdenum disulfide, 8-10 parts of polyphenylene sulfide, 6-9 parts of ethyl trimethoxy silane and 3-6 parts of copper powder. According to the polytetrafluoroethylene fiber provided by the invention, polytetrafluoroethylene is modified, special filler is used as an auxiliary material, the strength of the obtained polytetrafluoroethylene fiber is 20-30cN / dtex, the coefficient of linear expansion of the obtained polytetrafluoroethylene fiber is (2.13-3.38)*10<-5>k<-1>, hardness is obviously improved, and heat-conducting property is increased. In addition, since the coefficient of linear expansion is lowered, the volume change degree of the polytetrafluoroethylene fiber within the temperature of 250DEG C is also lowered, and the dimensional stability of the polytetrafluoroethylene fiber is also improved.
Description
technical field [0001] The present disclosure generally relates to the technical field of polymer materials, in particular to filter materials, especially to polytetrafluoroethylene fibers. Background technique [0002] Polytetrafluoroethylene fiber (PTFE for short), known as fluorine fiber in our country, is one of the best corrosion-resistant materials in the world today. It also has a high degree of chemical stability and excellent chemical corrosion resistance, such as resistance to strong acids, Strong alkali, strong oxidant, etc., have outstanding heat resistance, cold resistance and friction resistance, and can be used for a long time in an environment of 250 ° C, making PTFE fiber an exhaust purification filter material in the fields of waste incinerators and coal boilers first choice. For example, high-temperature dust filter bags made of PTFE fibers have been widely used as filter bags for municipal waste incinerators. However, the thermal power generation, chemi...
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