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PTFE 7A X 美國(guó)杜邦，價(jià)格合理,誠(chéng)信經(jīng)營(yíng)，可全國(guó)供貨（廣東省內(nèi)免費(fèi)送上門(mén)）。支持物流，快遞和貨運(yùn);支持現(xiàn)金，銀行轉(zhuǎn)賬交易。

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PTFE 7A X 美國(guó)杜邦特性：   

PTFE 7A X 美國(guó)杜邦                          

PTFE 7A X 美國(guó)杜邦

PTFE 7A X 美國(guó)杜邦

PTFE 7A X 美國(guó)杜邦

PTFE 7A X 美國(guó)杜邦

PTFE 7A X 美國(guó)杜邦

PTFE 7A X 美國(guó)杜邦

PTFE獨(dú)特的性能使其在化工、石油、紡織、食品、造紙、醫(yī)學(xué)、電子和機(jī)械等工業(yè)和海洋作業(yè)領(lǐng)域都有著廣泛的應(yīng)用。

1、防腐蝕性能的應(yīng)用

由于橡膠、玻璃、金屬合金等材料在耐腐蝕方面存在缺陷，難以滿(mǎn)足條件苛刻的溫度、壓力和化學(xué)介質(zhì)共存的環(huán)境，由此造成的損失相當(dāng)驚人。而PTFE材料以其卓越的耐腐蝕性能，業(yè)已成為石油、化工、紡織等行業(yè)的主要耐腐蝕材料。其具體應(yīng)用包括：輸送腐蝕性氣體的輸送管、排氣管、蒸汽管，軋鋼機(jī)高壓油管，飛機(jī)液壓系統(tǒng)和冷壓系統(tǒng)的高中低壓管道，精餾塔、熱交換器，釜、塔、槽的襯里，閥門(mén)等化工設(shè)備。

密封件的性能好壞對(duì)整個(gè)機(jī)器設(shè)備的效率與性能都有很大的影響。PTFE材料具有的耐腐蝕、耐老化、低摩擦系數(shù)及不粘性、耐溫范圍廣、彈性好的特性使其非常適合應(yīng)用于制造耐腐蝕要求高，使用溫度高于100℃的密封件。如機(jī)器、熱交換器、高壓容器、大直徑容器、閥門(mén)、泵的槽形法蘭的密封件，玻璃反應(yīng)鍋、平面法蘭、大直徑法蘭的密封件，軸、活塞桿、閥門(mén)桿、蝸輪泵、拉桿的密封件等等。

2、低摩擦性能在載荷方面的應(yīng)用

由于有的設(shè)備的摩擦部分不宜加油潤(rùn)滑，比如在潤(rùn)滑油脂會(huì)被溶劑溶解而失效的場(chǎng)合或者造紙、制藥、食品、紡織等工業(yè)領(lǐng)域的產(chǎn)品需要避免潤(rùn)滑油沾污，這就使填充PTFE材料成為機(jī)械設(shè)備零件無(wú)油潤(rùn)滑(直接承受載荷)的最理想材料。這是因?yàn)樵摬牧系哪Σ料禂?shù)是已知固體材料中最低的。其具體用途包括用于化工設(shè)備、造紙機(jī)械、農(nóng)業(yè)機(jī)械的軸承，用作活塞環(huán)、機(jī)床導(dǎo)軌、導(dǎo)向環(huán)；在土木建筑工程廣泛用作橋梁、隧道、鋼結(jié)構(gòu)屋架、大型化工管道、貯槽的支承滑塊，以及用作橋梁支座和架橋轉(zhuǎn)體等。

3、在電子電氣方面的應(yīng)用

PTFE材料固有的低損耗與小介電常數(shù)使其可做成漆包線(xiàn)，以用于微型電機(jī)、熱電偶、控制裝置等；PTFE薄膜是制造電容器、無(wú)線(xiàn)電絕緣襯墊、絕緣電纜、馬達(dá)及變壓器的理想絕緣材料，也是航空航天等工業(yè)電子部件不可缺少的材料之一；利用氟塑料薄膜對(duì)氧氣透過(guò)性大，而對(duì)水蒸汽的透過(guò)性小的這種選擇透過(guò)性，可制造氧氣傳感器；利用氟塑料在高溫、高壓下發(fā)生極向電荷偏離現(xiàn)象的特性，可制造麥克風(fēng)、揚(yáng)聲器、機(jī)器人上的零件等；利用其低折射率的特性，可制造光導(dǎo)纖維。

4、在醫(yī)療醫(yī)藥方面的應(yīng)用

膨體PTFE材料是純惰性的，具有非常強(qiáng)的生物適應(yīng)性，不會(huì)引起機(jī)體的排斥，對(duì)人體無(wú)生理副作用，可用任何方法消毒，且具有多微孔結(jié)構(gòu)，從而可用于多種康復(fù)解決方案，包括用于軟組織再生的人造血管和補(bǔ)片以及用于血管、心臟、普通外科和整形外科的手術(shù)縫合。

5、防粘性能的應(yīng)用

PTFE材料具有固體材料中最小的表面張力，不粘附任何物質(zhì)，同時(shí)還具有耐高低溫優(yōu)良的特性，從而使其在諸如制造不粘鍋的防粘方面的應(yīng)用非常廣泛。其防粘工藝主要包括兩種：把PTFE部件或薄片安裝在基體上，以及把PTFE涂層或與玻璃復(fù)合的漆布經(jīng)過(guò)熱收縮而套在基材上。

隨著材料應(yīng)用技術(shù)的不斷發(fā)展，PTFE材料的三大缺點(diǎn)：冷流性、難焊接性、難熔融加工性正在逐漸被克服，從而使它在光學(xué)、電子、醫(yī)學(xué)、石油化工輸油防滲等多種領(lǐng)域的應(yīng)用前景更加廣闊

PTFE 7A X 美國(guó)杜邦

PTFE (polytetrafluoroethylene)

Perbance 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 bed on the surface of the grinding material, the wear of PTFE can be reduced to a considerable extent.

2. Thermal perbance, PTFE thermal stability in the engineering plastics is extremely prominent. At 200 ℃ to the melting point, the decomb rate is very slow, the decomb is also very small, heated at 200 ℃ for a month, the decomb 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 perbance, outstanding perbance 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 bl 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 perbance, 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.

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PTFE 7A X 美國(guó)杜邦