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PTFE 超细粉 日本大金特性：

PTFE 超细粉 日本大金                      

PTFE 超细粉 日本大金

PTFE 超细粉 日本大金

PTFE 超细粉 日本大金

PTFE 超细粉 日本大金

PTFE 超细粉 日本大金

PTFE 超细粉 日本大金

填充PTFE
美国Allied Chemical公司        Halon TFE2015    Halon TFE1015    Halon TFE3060
    填充剂    石墨    玻纤    青铜粉
性能    熔融温度℃    331    331    331
    相对密度    2.12    2.22    3.97
    吸水率（23℃，24h）%        0.015    0.019
    拉伸强度MPa    20.7    23.4    13.1
    伸长率%    140    300    50
    弯曲强度MPa    17.9    13.8    23.1
    弯曲弹性模量GPa    1.31    1.07    2.00
    压缩弹性模量GPa    0.79    0.83    1.38
    邵氏硬度（D）    64    64    72
    缺口冲击J/m    165    133    123
    最高使用温度℃    间断    260    260    260
        续使    232    232    232
    线膨胀系数10-5/℃    8.3    5.6    8.1
    热导率W/(m.℃)    0.46    0.39    0.50
性能特点    填充PTFE主要品种有：玻纤填充PTFE，石墨填充PTFE，二硫化钼填充PTFE，氮化硼填充PTFE，碳纤维填充PTFE，青铜粉填充PTFE。
    玻纤填充PTFE    石墨填充PTFE    二硫化钼填充PTFE    氮化硼填充PTFE    碳纤维填充PTFE    青铜粉填充PTFE
    具有优良的机械性能和耐氧化性能，但耐碱性较差。玻纤还可与石墨或二硫化钼混合使用。    具有优良的耐化学药品性，耐压缩蠕变性，良好的热传导性和较高的抗冲击强度。磨擦因数小，但耐磨性比正经纤填充PTFE差。    能增加PTFE的表面硬度，降低磨擦因数和磨损量，而且耐蠕变性和电绝缘性也很好。    具有良好的耐磨损性，耐蠕变性和耐化学药品性。    具有优良的机械性能、耐热性和耐磨擦性能，线膨胀系数小，热导率高。与玻纤增强相比，碳纤维增加的PTFE的抗压强度、耐蠕变性以及在水中的耐磨性均得到大幅度提高。    具有优异的耐磨性和抗蠕变性，热导率高，但电绝缘性和耐化学药品性则明显下降。
成型/加工    模压
应用    主要应用于化学和机械工业领域。常用于制作轴承、轴瓦、活塞环、阀座、政治部体、导向环、机床滑动导轨、转动密封填料、密封圈、密封环、密封垫片及衬垫等。氟化锂填充PTFE可用于制热释光材料。

氟树脂/PPS
品名    RFG-2140U    RG-40JA    PA46
    氟树脂/PPS    PPS    PA46
    40%玻纤    40%玻纤    30%玻纤
性能    相对密度    1.74    1.64    1.40
    拉伸强度MPa    183.2    147.0    158.8
    伸长率%    2.2    1.4    4.8
    弯曲强度MPa    288.1    209.7    253.8
    弯曲弹性模量GPa    13.4    13.7    8.8
    冲击J/m    缺口    10.1    8.0    10.7
        无缺口    63    41    69
    落球试验（100*100*3，球高1.5m，重0.54Kg）    裂缝    断裂    断裂
    成型收缩率%    0.2    0.2    0.3
    线膨胀系数10-5/℃    1.4    1.5    2.8
    热变形温度（1.82MPa）℃    >260    >260    >260
    阻燃性UL94    V-0    V-0    HB
    熔体指数（300℃，载荷5Kg），g/10min    10    17    
    磨擦因数（对磨材料S45C钢）    0.23    0.45    0.41
    吸水率（23℃，24h）%    0.008    0.014    1.46
性能特点    耐冲击性是RFG-2140U最显著的特性之一。 RFG-2140U具有优异的磨擦磨损性能。 RFG-2140U的吸水率极低，耐热性优于PPS。合金的成型性相比氟树脂有了明显的改善。另外，合金的成型收缩率和尺寸精度与PPS处于同一水平上。
总之 RFG-2140U是一种兼具氟树脂的耐热性、耐化学药品性、耐冲击性和PPS的强度、成型性、尺寸精度的新材料，适用于要求具在各种良好组合性能的领域。
成型/加工    
应用    用于制造要求具有高强度、耐冲击性和耐化学药品性的机械设备的壳体、罩盖；要求具有高的强度、刚性、耐热性和尺寸稳定性的齿轮和插头座等。

PTFE 超细粉 日本大金

The mechanical properties of polytetrafluoroethylene are softer. Has a very low surface energy.

Polytetrafluoroethylene (F4, PTFE) has a series of excellent performance: high temperature - long-term use temperature of 200 to 260 degrees, low temperature - at -100 degrees when still soft; corrosion resistance - resistant to water and all organic solvents; (0.04); non-sticky - has the smallest surface tension in the solid material without adhering to any substance; no toxic - has a physiological inertness; has a physiologically inert life; Excellent electrical performance, is the ideal C-class insulation material, a thick layer of the newspaper will be able to block the 1500V high pressure; even more smooth than ice. PTFE materials, widely used in the defense industry, atomic energy, oil, radio, electrical machinery, chemical industry and other important departments. Products: polytetrafluoroethylene tetraethylene, pipe, sheet, turning sheet. Polytetrafluoroethylene is a polymer of tetrafluoroethylene. English abbreviation for PTFE. Structural formula: CF3 (CF2CF2) nCF3.20 late 30s found that the 40's into industrial production. The nature of polytetrafluoroethylene relative molecular mass is large, low for hundreds of thousands, high up to 10 million or more.

Although the carbon-carbon bonds and carbon-fluorine bonds in the perfluorocarbons need to absorb energy 346.94 and 484.88kJ / mol, respectively, but the decomposition of polytetrafluoroethylene to produce 1mol of tetrafluoroethylene only energy 171.38kJ. So in the pyrolysis, the main depolymerization of tetrafluoroethylene tetrafluoroethylene. The weight loss rate (%) of polytetrafluoroethylene at 260, 370 and 420 ° C is 1 × 10-4.4 × 10-3 and 9 × 10-2, respectively. It can be seen that polytetrafluoroethylene can be used at 260 ℃ for a long time. Due to high temperature cracking also produce highly toxic byproducts Fluorocarbon and perfluoroisobutylene, etc., so pay special attention to safety protection and to prevent the exposure of Teflon open flame.

Mechanical properties

Its friction coefficient is very small, only 1/5 of polyethylene, which is an important feature of the perfluorocarbon surface. And because the fluorine - carbon chain between the molecular force is very low, so polytetrafluoroethylene has a non - stick.

Polytetrafluoroethylene in the -196 ~ 260 ℃ wide temperature range to maintain excellent mechanical properties, perfluorocarbon polymer is one of the characteristics of the low temperature does not brittle.

PTFE density is large, 2.14 a 2. 20g / cm3, almost no water, the balance of water absorption is less than 0. 01%.

Polytetrafluoroethylene is a typical soft and weak polymer, macromolecules between the smaller gravitational attraction, stiffness, hardness, strength are small, in the long-term stress will be deformed.

Teflon is prone to creep when loaded, and is a typical plastic with cold flow. The creep of PTFE varies with compressive stress, temperature and crystallinity, and the higher the temperature, the greater the creep. The crystallinity of PTFE is between 55% and 80%, and the creep is not more than 2%. When the crystallinity is below 55% and 80%, the creep increases rapidly.

Teflon mechanical properties of the excellent characteristics of the friction factor is small, between 0. 01 and 0.10, in the existing plastic materials, and even the smallest of all engineering materials.

The friction factor of PTFE increases with the increase of the sliding rate, and when the linear velocity reaches 0. 5 to 1. 0 m / s or more, and the static friction factor is smaller than the dynamic friction factor, this characteristic is used for bearing manufacturing. Reduce its starting resistance, so that from start to operation are very smooth. The friction factor of PTFE decreases with increasing load, and tends to be constant when the load reaches 0. 8 MPa or more. At high speed and high load, the friction coefficient of PTFE is less than 0. 01. From ultra-low temperature to PTFE melting point,

Its friction factor is almost unchanged, only when the surface temperature is higher than the melting point, the friction factor is only a sharp increase.

Due to the small intermolecular gravity, PTFE hardness is low, easy to be worn by other materials. However, as long as the surface roughness of the grinding material is appropriate, the amount of wear of PTEF can be reduced to a considerable extent.

Weatherability

Polytetrafluoroethylene has a high chemical resistance, such as concentrated sulfuric acid, nitric acid, hydrochloric acid, and even boiled in aqua regia, its weight and performance are no change, almost insoluble in the vast majority of solvents, only 300 ℃ Or more slightly soluble in the whole alkane (about 0.1 g / 100 g). Polytetrafluoroethylene does not absorb moisture, non-combustible, oxygen, UV are very stable, so it has excellent weather resistance.

It is noteworthy that polytetrafluoroethylene can not tolerate a strong reducing atmosphere

Molten alkali metal, ammonia alkali solution (alkali metal dissolved in liquid ammonia), some fluoride (such as TFA), naphthalene sodium salt and so can quickly corrosion polytetrafluoroethylene products

Electrical performance

Polytetrafluoroethylene in a wide frequency range of dielectric constant and dielectric loss are very low, and the breakdown voltage, volume resistivity and arc resistance are higher.

Radiation resistance

Polytetrafluoroethylene has poor radiation resistance (104 rad), degraded by high energy radiation, and the electrical and mechanical properties of the polymer are significantly reduced.

polymerization

Polytetrafluoroethylene is produced by free radical polymerization of tetrafluoroethylene. The industrial polymerization is carried out in the presence of a large amount of water to disperse the heat of reaction and to facilitate the control of the temperature. The polymerization is generally carried out at a pressure of 40 to 80 ° C and a pressure of 3 to 26 kgf / cm 2, and an inorganic persulfate, an organic peroxide as an initiator and an oxidation-reduction initiator system may be used. Approximately 171.38 kJ of polymerisation per mole of tetrafluoroethylene. Dispersed polyesters should be added with perfluorinated surfactants such as perfluorooctanoic acid or salts thereof.

Coefficient of expansion

(25 to 250 ° C) 10 to 12 × 10 -5 / ° C

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PTFE 超细粉 日本大金