WE-LOCK CO. - | E-Showroom
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ASTM Standards |
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A. Specifications PTFE Resin Filled PTFE Compound- Primary Forms |
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Sr. No. |
Title |
No. |
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1 |
PTFE Resin |
D - 1457 D - 4894 |
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2 |
Filled PTFE Compounds |
D - 4745 |
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B. Test Procedure PTFE Resin - Primary Forms |
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1 |
Apparent Density |
D - 1895 |
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2 |
Bulk Factor |
D - 1895 |
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3 |
Pourability |
D - 1895 |
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4 |
Filler Content |
E - 1131 |
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5 |
Particle Size |
D - 4894 |
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6 |
Shrinkage |
D- 4894 |
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7 |
Flow Index (Powder Flow) |
D - 1855 |
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8 |
Colour / Appearance |
D - 6290 |
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9 |
Water Content |
D - 6980 |
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C. Specifications PTFE Products Secondary Forms |
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1 |
PTFE Molded Basic Shapes |
D - 3294 |
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2 |
PTFE Rod-Molded |
D - 1710 |
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3 |
PTFE Bush-Molded |
D - 1710 |
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4 |
PTFE Rod- Ram Extruded |
D - 3295 |
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5 |
PTFE Tube- Ram Extruded |
D - 3295 |
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6 |
PTFE Molded Sheet |
D - 3294 |
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7 |
PTFE Skived Sheet |
D - 3308 |
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8 |
PTFE Tube Paste Extruded |
D - 1710 |
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D. Test Procedure PTFE Products - Secondary Forms |
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1 |
Density |
D - 792 |
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2 |
Tensile Strength |
D - 638 |
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3 |
Elongation |
D - 638 |
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4 |
Compressive strength |
D - 695 |
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5 |
Deformation Under Load |
D - 621 |
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6 |
Flexural Strength |
D - 790 |
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7 |
Impact Strength |
D - 236 |
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8 |
Hardness Shore D |
D - 2240 |
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9 |
Coefficient of Friction |
D - 1894 |
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10 |
Water Absorption |
D - 570 |
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11 |
Heat Resistance |
D - 648 |
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12 |
Continuous Service Temperature |
D - 648 |
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13 |
Thermal Conductivity |
D - 696 |
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14 |
Linear Thermal Expansion |
D - 696 |
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15 |
Die-electric Strength |
D - 149 |
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16 |
Volume Resistivity |
D - 257 |
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17 |
Surface Resistivity |
D - 258 |
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18 |
Dimensional Stability |
D-1710 |
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19 |
Chemical Resistance |
D - 543 |
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20 |
Wear Rate |
D - 137 |
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British Standards PTFE Resin (Primary Form) Products(Secondary Form) |
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1 |
Specification of PTFE Materials (Primary Forms) |
BS ISO 12086 |
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2 |
Test Procedures of PTFE Resin (Primary Forms) |
BS ISO 12086 |
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3 |
Specification of PTFE Parts (Secondary Forms) |
BS EN ISO 13000 |
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4 |
Test Procedures of PTFE Parts (Secondary Forms) |
BS EN ISO 13000 |
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Indian Standards - PTFE Resin (Primary Form) |
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1 |
Polytetrafluoroethylene (PTFE) Materials for Moulding Extrusion |
IS-14635 |
Selection Guide of PTFE and Filled PTFE
PTFE is available in virgin & filled compounds to improve the basic characteristics to match very diverse applications & optimization for specific end users. The grade of PTFE is selected from Virgin & Filled PTFE grades of PTFE, based on required property for required service conditions / applications. The selection guide elaborates various grades of PTFE & Filled PTFE, filler content in PTFE, basic properties & relevant service conditions / End user applications
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Sr.No. |
Grade |
Filler Content by Weight % |
Standard Series |
Properties |
Applications |
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1 |
Virgin PTFE |
- |
Yes |
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Gaskets, Bellows, food / contact & medicine / human consumption applications. |
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2 |
Chemically Modified PTFE |
- |
Yes |
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Pumps, Diaphragms, Ball Valve Seats, Components of Mechanical Seals, Dipped Pipes for reaction vessels, Vessel Lining |
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3 |
Pigmented PTFE |
- |
No |
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Colour coded electrical cable sheathings |
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4 |
Glass filled PTFE |
15 - 25 |
Yes |
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Ball valve component, bridge bearing pads, ship launching pads,pipe supporting pads. |
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5 |
Carbon/Coke filled PTFE (soft amorphous/ hard fiber) |
25 - 35 |
Yes |
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