聚四氟乙烯网

      PTFE Detailed Properties

      2009-03-04  

    聚四氟乙烯英文资料,希望对大家有用。

    The table below lists a generally accepted summary of properties that we believe to be reliable. Please note that many of these resins are produced in several varieties and property characteristics may vary. Therefore, determination of resin is dependent on the application and this table is only meant to serve as a general guideline.

    Properties ASTM or Unit PTFE
    MECHANICAL PROPERTIES
    Specific Gravity D792 2.18
    Elongation % D638 200~450
    Tensile Strength (psi) D638 2,000~4,500
    Flexural Strength (psi) D790 no break
    Compressive Strength(psi) D695 3,500(24MPa)
    Tensile Elastic Modulus
    (Young's Modulus) (psi) D638 57,000
    (psi)
    Flexural Modulus
    103MPa (103kgf/cm2) D790 71,000~
    85,000
    D790 0.5-0.6
    (5.0-6.0)
    FlexLife
    (MIT cycles) D2176 >1,000,000
    Hardness Durometer
    Shore D D636 D50~65
    Coefficient of Friction on steel 0.02
    Abrasion Resistance
    1000 revs. Taber 12
    Impact Strength IZOD
    73°F/23°C, notched ft/lbs/in D256 3
    THERMAL PROPERTIES
    Melting Point °C
    (°F) 327
    (621)
    Upper Service
    Temperature(20,000h) °C
    (°F) 260
    (500)
    Flame Rating** UL 94 V-0


    Thermal Conductivity
    BTU/hr/ft2/deg F in 1.7
    cal/sec/cm2,ºC/cm 6 x 10-4
    Linear Coefficient of Thermal Expansion 10-5 °C D696 >11.6
    Heat of Fusion BTU/LB 29-37
    Heat of Combustion BTU/LB 2200
    Low Temperature Embrittlement °C
    (°F) -268
    (-450)
    ELECTRICAL PROPERTIES
    Dielectric Constant D150/103Hz 2.1
    D150/106Hz 2.1
    Dielectric Strength
    10 mil film D149 >1400
    Volume Resistivity ohm-cm D257 >1018
    Surface Resistivity
    ohm/sq. D257 >1017
    GENERAL PROPERTIES
    Chemical/Solvent
    Resistance D543 Excellent
    Water Absorption, 24h % <0.01
    Deformation Under Load *D621/100°C 5.0
    **D621/25°C 7.0
    Refractive Index 1.35
    Limiting Oxygen Index >95 >95
    Properties ASTM or Unit PTFE
    *6.8 MPa (986 psi),24h
    **13.7 MPa (1987 psi),24h

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