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PTFE Teflon Components

PTFE Teflon Components
Product Description

PTFE is a self lubricating engineering material of construction which can markedly improve the performance and service life of wear elements, seals and other key components of hydraulic pneumatic and mechenical system. when used in its virgin state, this materias offers the design engineer a unique set of basic properties including a co-effieient of friction lower than that of graphite, outstanding temperture resistance and corrosion and chemical reistance equal to of better than that of glass. when compounded with inorganic filers or when used as an internal lubricant for other thermoplastics, it possesses a wear resistance comparable to many softmetal alloys and superior to most other self lubrication materials. PTFE posseses many special properties which are the particular interest to the mechenical, hydraulic and pneumatic engineer, such as  freedom from stick slip, an exellent plastic memory and an ability to absorb contaminants. because of these basic and special property advantage. PTFE can used in many difficult application where hostile environment of operating restriction cause early failure of entirely preclude the use of lubricants and parts constructued form other materials. it can simplify the design and lower cost of system where there are no unusal application difficulties by eliminating the need for lubrication, permitting standrazation of construction materials and performaing a multiplicity of function. A potential application for PTFE exist in particularly any machanism involving sliding, oscillating or rotery contace between parts and any static application involving corrisive chemical severe weathering of exteme operating temperatures.

TYPICAL PROPERTIRES OF PTFE

PROPERTY

UNITS

METHOD

VALUES

Specific gravity

g/cm3

ASTM D 7792

2.14-2.18

Tensil strength

N/mm2 (1)

ASTM D 1457

20-35

Elongation at break

%

ASTM D 1457

210-400

Compressive Strength 1% deformation

%

ASTM D 1457

4-4,5

Deformation under load (14 N/mm2/24 hrs)

%

ASTM D 621

10-15

Flexural Strength (70 N/mm2) (1)

N/mm2 (1)

ASTM D 790

No breaking

Impact strength (izod)

N/mm2 (1)

 

 

 57C

 23C

 77C

 

J/Cm (1)

J/Cm (1)

ASTM D 256

ASTM D 256

ASTM D 256

 

ASTM D2561,1

1,6

3,3

Hardness (Shore D)

----

ASTM D 2240

50-60

Friction Coeficient

      Static

      Synamic

 

----

----

 

(2)

(2)

 

0.09

0.05

PTFE steel oil lubricant

 

 

0.02-0.06

Melting point

C

 

320-340

Increase in volume from room temperature to moltan state (340C)

%

----

27-28%

Coefficient of thermal expansion

   From 25 to 100 C

  From 20 to 200C

 

 

0C-1 X 10-5

0C-1 X 10-5

 

 

Dilatometer

Dilatometer

 

 

 

16

19

Thermal Conductivity

W/m 0K(1)

 Cenco-Fitch

0,23

Specific Heat

At 0C

At 50C

 

Kj/kg, 0K (1)

Kj/kg, 0K (1)

 

 

 

----

----

 

0,96

1.05

Temperature of distortion

 At 0.46 N/mm2 (1)

At 1.85 N/ mm2

 

 

C

C

 

 

ASTM D648

ASTM D648

 

 

 

130-140

50-60

Dielectric strength (Short time, air, thickness 0.5mm)

Kv/mm

ASTM D149

55

Dielectric Constant (50-10 Hz)

---

ASTM D150

2,1

Dissipation factor

----

ASTM D150

<0,0002

Volume resistancy

Ohm/cm

ASTM D257

1017

Surface resistance 100% r.h.

Ohm/cm

ASTM D257

1015

ARC-resistance 420sec

Sec

ASTM D495

Without defects

Water absorption

%

ASTM D570-

<0,01%

Inflammability

    ATB

    ATB

 

Sec

Mm

 

ASTM D635

ASTM D635

 

<5

<5