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PTFE TE3859 美国杜邦特性：    

PTFE TE3859 美国杜邦                     

PTFE TE3859 美国杜邦

PTFE TE3859 美国杜邦

PTFE TE3859 美国杜邦

PTFE TE3859 美国杜邦

PTFE TE3859 美国杜邦

PTFE TE3859 美国杜邦

PTFE独特的性能使其在化工、石油、纺织、食品、造纸、医学、电子和机械等工业和海洋作业领域都有着广泛的应用。

1、防腐蚀性能的应用

由于橡胶、玻璃、金属合金等材料在耐腐蚀方面存在缺陷，难以满足条件苛刻的温度、压力和化学介质共存的环境，由此造成的损失相当惊人。而PTFE材料以其卓越的耐腐蚀性能，业已成为石油、化工、纺织等行业的主要耐腐蚀材料。其具体应用包括：输送腐蚀性气体的输送管、排气管、蒸汽管，轧钢机高压油管，飞机液压系统和冷压系统的高中低压管道，精馏塔、热交换器，釜、塔、槽的衬里，阀门等化工设备。

密封件的性能好坏对整个机器设备的效率与性能都有很大的影响。PTFE材料具有的耐腐蚀、耐老化、低摩擦系数及不粘性、耐温范围广、弹性好的特性使其非常适合应用于制造耐腐蚀要求高，使用温度高于100℃的密封件。如机器、热交换器、高压容器、大直径容器、阀门、泵的槽形法兰的密封件，玻璃反应锅、平面法兰、大直径法兰的密封件，轴、活塞杆、阀门杆、蜗轮泵、拉杆的密封件等等。

2、低摩擦性能在载荷方面的应用

由于有的设备的摩擦部分不宜加油润滑，比如在润滑油脂会被溶剂溶解而失效的场合或者造纸、制药、食品、纺织等工业领域的产品需要避免润滑油沾污，这就使填充PTFE材料成为机械设备零件无油润滑(直接承受载荷)的最理想材料。这是因为该材料的摩擦系数是已知固体材料中最低的。其具体用途包括用于化工设备、造纸机械、农业机械的轴承，用作活塞环、机床导轨、导向环；在土木建筑工程广泛用作桥梁、隧道、钢结构屋架、大型化工管道、贮槽的支承滑块，以及用作桥梁支座和架桥转体等。

3、在电子电气方面的应用

PTFE材料固有的低损耗与小介电常数使其可做成漆包线，以用于微型电机、热电偶、控制装置等；PTFE薄膜是制造电容器、无线电绝缘衬垫、绝缘电缆、马达及变压器的理想绝缘材料，也是航空航天等工业电子部件不可缺少的材料之一；利用氟塑料薄膜对氧气透过性大，而对水蒸汽的透过性小的这种选择透过性，可制造氧气传感器；利用氟塑料在高温、高压下发生极向电荷偏离现象的特性，可制造麦克风、扬声器、机器人上的零件等；利用其低折射率的特性，可制造光导纤维。

4、在医疗医药方面的应用

膨体PTFE材料是纯惰性的，具有非常强的生物适应性，不会引起机体的排斥，对人体无生理副作用，可用任何方法消毒，且具有多微孔结构，从而可用于多种康复解决方案，包括用于软组织再生的人造血管和补片以及用于血管、心脏、普通外科和整形外科的手术缝合。

5、防粘性能的应用

PTFE材料具有固体材料中最小的表面张力，不粘附任何物质，同时还具有耐高低温优良的特性，从而使其在诸如制造不粘锅的防粘方面的应用非常广泛。其防粘工艺主要包括两种：把PTFE部件或薄片安装在基体上，以及把PTFE涂层或与玻璃复合的漆布经过热收缩而套在基材上。

随着材料应用技术的不断发展，PTFE材料的三大缺点：冷流性、难焊接性、难熔融加工性正在逐渐被克服，从而使它在光学、电子、医学、石油化工输油防渗等多种领域的应用前景更加广阔

PTFE TE3859 美国杜邦

PTFE (polytetrafluoroethylene)

Performance relative density 2.14 ~ 2.2

    Water absorption (23 ℃, 24h)% <0.01

    Tensile strength MPa 22 ~ 35

    Elongation% 200 ~ 400

    Tensile elastic modulus GPa 400

    Bending elastic modulus MPa 420

    Compression elastic modulus GPa 500

    Notched impact strength J / m 163

    Heat distortion temperature ℃ 0.45MPa 121

        1.82MPa 55

    Linear expansion coefficient 10-5 / ℃ 10

    Flame retardant (UL94) V-0

    Volume resistivity Ω.cm 1017 ~ 1018

    Dielectric constant <2.1

    Dielectric loss tangent <2 × 10-4

    Dielectric strength KV / mm> 17

    Arc resistance s> 300

Features 1. Physical and mechanical properties, PTFE relative density is large, almost no water. Tough and resilient. Has a very small friction factor, showing excellent lubricity. The static friction factor of PTFE is smaller than the dynamic friction factor, and the friction factor remains almost constant from the ultra-low temperature to the melting point. But PTFE hardness is easy to be worn by other materials. If a layer of PTFE film can be formed on the surface of the grinding material, the wear of PTFE can be reduced to a considerable extent.

2. Thermal performance, PTFE thermal stability in the engineering plastics is extremely prominent. At 200 ℃ to the melting point, the decomposition rate is very slow, the decomposition is also very small, heated at 200 ℃ for a month, the decomposition of less than one millionth, can be ignored. PTFE at -250 ℃ is still not brittle Can be used in the -250 ~ 260 ℃ long-term use.

3. Electrical properties, PTFE is a highly non-polar material, with excellent excellent performance, outstanding performance at 0 ℃ above, the dielectric properties do not affect the frequency and temperature, nor the impact of humidity and corrosive gases The The volume resistivity and surface resistivity of PTFE are the highest of all engineering plastics, and even if they are immersed in water for a long period of time, they do not degrade significantly. In 100% relative humidity, the surface resistivity remains the same. When the crystallinity of PTFE is between 50% and 80%, the dielectric strength is almost independent of crystallinity and has the lowest dielectric constant. PTFE is excellent in arc resistance.

4. Chemical resistance, PTFE has excellent chemical stability, almost no erosion of any chemical substances, many strong corrosive, strong oxidizing chemicals, it almost does not work, so there is the name of the plastic king The Only the alkali metal in the molten state can remove the fluorine atoms in the PTFE and make the surface discolored.

5. Other properties, PTFE resistance to atmospheric aging is very prominent, even if exposed to the atmosphere in the long term, the surface will not produce any changes. PTFE flame retardant is also very prominent, it is up to 95% oxygen index, ranking first, flame retardant UL94 V-0 level. Non-sticking is another important feature of PTFE, almost no solid material can not adhere to its surface. But the role of high-energy radiation on it obvious.

Molding / processing molding, extrusion, coating and calendering.

Application of PTFE a series of unique performance, is unmatched by other engineering plastics, therefore, widely used in machinery, electrical appliances, chemical equipment, medical equipment and construction and other fields.

1. Machinery, a large number used in the manufacture of bearings, piston rings, machine tool rails, sealing materials.

2. Electronic appliances, the most important use is to create a variety of wire and cable insulation, such as coaxial RF cables, battery electrodes, battery separator, printed circuit boards, acoustic film, high-precision capacitors.

3. Chemical equipment, such as pipes, valves, heat exchangers and so on.

4. Medical equipment, PTFE heat resistance, no side effects on the biological, from the body erosion and other characteristics, can manufacture a variety of medical equipment, such as skin covering materials, tissue repair materials.

5. Construction, can be used to manufacture bridges, tunnels, steel roof trusses, highways and large storage tanks, such as support sliders.

6. In the automotive industry, the manufacture of automotive power steering equipment seal ring; in the military industry, the right to create the engine internal parts, bushings, electrical connectors, etc .; can also be combined with other fabrics can be made corrosion-resistant Filter bags, waterproof, breathable, windproof and warm warm raincoats, as well as sportswear, mountaineering suits, diving suits and light military tents.

如需了解更多关于PTFE TE3859 美国杜邦及 的详细信息，欢迎致电联系。

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PTFE TE3859 美国杜邦