聚四氟乙烯英文性能指标
PTFE Detailed Properties(Polytetrafluoroethylene)
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
物理性能：聚四氟乙烯塑料表面光滑，蜡状，极梳水。一般为乳白色不透明。但淬火制品具有一定的透明性。平均密度为2.2。
力学性能：抗拉强度20.0~30.0MPa，断裂伸长率300%~400%。弹性模量400 Mpa。表面硬度大约为55-70HS。PTFE之间的摩擦系数大约为0.1-0.2。
化学性能：能耐绝大部分强腐蚀性物质，至今尚无一种能在300℃以下溶解它的溶剂。耐候性强。可存放10年以上。
页:
[1]