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Home > Our Products Range > PTFE Products > Properties

GENERAL PROPERTIES OF PTFE:

PTFE mechanical properties are low compared to other plastics, but its properties remain at a useful level over a wide temperature range of -100 deg. F to +400 deg. F. (-73 deg. C to 204 deg. C) Mechanical properties are often enhanced by adding filters (see paragraph below). It has excellent thermal and electrical insulation properties and a low coefficient of friction. PTFE is very dense and cannot be melt processed - it must be compressed and sintered to form useful shapes.

FILLED GRADES:-

PTFE's mechanical properties can be enhanced by adding fillers such as glass fibers, carbon, graphite, molybdenum disulphide and bronze. Generally, filled PTFE's maintain their excellent chemical and high temperature characteristics, while fillers improve mechanical strength, stability and wear resistance.

The properties of 25% glass-filled and 25% carbon-filled PTFE grades are shown below for comparison purposes. There are literally dozens of different filled PTFE products and grades - too many to listed here. Please contact Boedeker Plastics for more information about other filled PTFE products for your application.

TYPICAL PROPERTIES OF PTFE:

PRODUCT

:

GLASS FIBRE REINFORCED FILLED PTFE.

IN-PUT SOURCE

:

PTFE

IDENTIFICATION

:

01

GRADE

:

"SUPER INDIA"

 

Sr. No CHARACTERISTICS TEST METHOD
(ASTM)
UNIT TEST VALUE
1. Flowability - - Semi free flow
2. Filler content (W/W) - % 25
3. Specific Gravity D4745 Gm/cm2 2.37
4. Bulk density D4745 g/I 578
5. Tensile Strength D4745 Kg/cm2 91
6. Elongation D4745 % 130
7. Shrinkage D4745 % 4.0
8. Hardness D2240 Shore D 63

PRODUCT

:

PTFE 25% CARBON

IN-PUT SOURCE

:

PTFE

IDENTIFICATION

:

24

GRADE

:

25% CARBON FILLED PTFE - SF

 

Sr. No CHARACTERISTICS TEST METHOD
(ASTM)
UNIT TEST VALUE
1. Flowability - - Semi free flow
2. Filler content (W/W) - % 25
3. Specific Gravity D4745 Gm/cm2 2.04
4. Bulk density D4745 g/I 520
5. Tensile Strength D4745 Kg/cm2 178
6. Elongation D4745 % 182
7. Shrinkage D4745 % 1.9
8. Hardness D2240 Shore D 68

 

PRODUCT

:

PTFE 60% BRONZE

IN-PUT SOURCE

:

PTFE

IDENTIFICATION

:

03

GRADE

:

60% BRONZE FILLED PTFE - SF

 

Sr. No CHARACTERISTICS TEST METHOD
(ASTM)
UNIT TEST VALUE
1. Flowability - - Semi free flow
2. Filler content (W/W) - % 60
3. Specific Gravity D4745 Gm/cm2 3.940
4. Bulk density D4745 g/I 1125
5. Tensile Strength D4745 Kg/cm2 188
6. Elongation D4745 % 2.1
7. Shrinkage D4745 % 260
8. Hardness D2240 Shore D 67

TYPE : FC-35 CA

35% Carbon / Graphite filled non free flow compound based on granular PTFE:

Properties

Typical Values

Units

Specific Gravity 2.00 g/cm2
Shrinkage 1.5 %
Tensile Strenght 14 MPa
Elongation 90 %
Bulk Density 500 g/ltr.
Hardness 66 Shore "D"

Recommended Processing Conditions

Moulding Pressure 70 MPa
Maximum Sintering Temperature 365 Deg. C.

TYPE : FC-15 GR

15% Graphite filled non free flow compound based on granular PTFE:

Properties

Typical Values

Units

Specific Gravity 2.1 g/cm2
Shrinkage 2.3 %
Tensile Strenght 20 MPa
Elongation 220 %
Bulk Density 460 g/ltr.
Hardness 64-65 Shore "D"

Recommended Processing Conditions

Moulding Pressure 50 MPa
Maximum Sintering Temperature 365 Deg. C.

TYPE : FC-15 GL 5 MO

15% Glass plus 5% molybdenum disulphide filled on non free flow compound based on granular PTFE:

Properties

Typical Values

Units

Specific Gravity 2.24 g/cm2
Shrinkage 2.3 %
Tensile Strenght 24 MPa
Elongation 270 %
Bulk Density 530 g/ltr.
Hardness 62 Shore "D"

Recommended Processing Conditions

Moulding Pressure 45 MPa
Maximum Sintering Temperature 365 Deg. C.

TYPE : FC-40 BR

40% Bronze filled non free flow compound based on granular PTFE:

Properties

Typical Values

Units

Specific Gravity 3.07 g/cm2
Shrinkage 2.5 %
Tensile Strenght 26 MPa
Elongation 270 %
Bulk Density 500 g/ltr.
Hardness 67-68 Shore "D"

Recommended Processing Conditions

Moulding Pressure 45 MPa
Maximum Sintering Temperature 365 Deg. C.

TYPE : FC-40 GL

40% Glass filled non-free flow compound based on granular PTFE:

Properties

Typical Values

Units

Specific Gravity 2.25 g/cm2
Shrinkage 10.9 %
Tensile Strenght 14 MPa
Elongation 200 %
Bulk Density 570 g/ltr.
Hardness 65 Shore "D"

Recommended Processing Conditions

Moulding Pressure 65 MPa
Maximum Sintering Temperature 365 Deg. C.

 

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