PTFE Virgin Sheet and Rod | Chemours PTFE Sheet and Rod
PTFE Sheet | Chemours Sheet, polytetrafluoroethylene, more commonly known as Chemours PTFE, is one of the three fluorocarbon resins in the fluorocarbon class composed wholly of fluorine and carbon. The other resins in this group, are PFA and FEP and is reviewed under that heading.
The forces binding the fluorine and carbon together provide one of the strongest known chemical linkages in a compact symmetrical arrangement of atoms. The result of this bond strength plus the chain configuration is a relatively dense, chemically inert, thermally stable polymer.
PTFE material resists attack by heat and virtually all chemicals. It is insoluble in all organics with the exception of a few exotic strong base chemicals. Its electrical properties are excellent. Although it has high impact strength, its resistance to wear, tensile strength and creep resistance are low in comparison to other engineering type thermoplastics. Mechanical properties can be improved by adding fillers such as glass fibers, bronze, Delrin, carbon, and graphite.
PTFE rod, sheet and tube exhibits the lowest electric constant and lowest dissipation factors of all solid materials. Because of its strong chemical linkage, PTFE tube, rod and sheet shows very little attraction for dissimilar molecules. This results in a coefficient of friction as low as 0.05. Once again, because of this chemical bonding, PTFE plastic resins are virtually insoluble.
Properties, Applications and Availabilities for the PTFE Sheet and Rod - Chemours PTFE Sheet and Rod
| Properties | Applications | Availabilities |
|---|---|---|
| Inertness to most chemicals | Non lubricated bearings | Rod: .062″ to 9.000″ |
| Resistance to high temperatures | Valve components | Sheet: .032″ to 2.000″ |
| Low coefficient of friction | High temp electrical parts | Film: .001″ to .032″ |
| Excellent dielectric properties | O-rings | Tubing: from .125″ I.D. to 9.000 O.D. |
| Chemically resistant | Packings | Standard Color:Natural/White |
| Relatively insensitive to power frequency | Seals | Specification: AMS-3651 & Mil-P-22241 |
| Zero moisture absorption | Gaskets | |
| Excellent radiation resistance | Baffles | |
| Coaxial cable connectors | ||
| Capacitors | ||
| Transformer |
Military and Commercial Specification:
| Extruded and Molded Rod: | Mil-P-19468 cancelled and superseded to ASTM D 1710 |
|---|---|
| Mil-P-22296 cancelled and superseded tp ASTM D 1710 | |
| Mil-R-8791 replaced by AS8791 | |
| AS8791 (SAE) Specification is for finished PTFE parts | |
| ASTM D 1710 Type 1, Grade 1, Class A | |
| Type 1 premium grade, Virgin | |
| Type 2 General Purpose, Virgin | |
| Type 3 Non-Critical, Mechanical grade | |
| Type 4 Utility Grade, Mechanical Grade | |
| Grade 1 Virgin PTFE | |
| Grade 2 Mechanical PTFE | |
| Class A Normal dimensional stability | |
| Class B Special Quote | |
| Class C X ray, No Quote | |
| Class D X ray, No Quote | |
| ASTM D 4894 Resin specification only Type III, & Type IV | |
| AMS 3651 replaced by AMS 3656 | |
| AMS 3656 Rev E Extruded Rod and Tubes | |
| Type 1 requires additional radiographic & dielectric testing | |
| Type 2 requires additional radiographic testing | |
| Type 3 Finished parts with additional dielectric testing | |
| Type 4 Finished Parts less test and report | |
| AMS 3658C Premium Strength, SR, radiographic testing (Special Quote) | |
| AMS 3659 Premium Strength, Sintered, (SR) Stress Relieved | |
| AMS 3660 Molded, General Purpose Virgin unfilled rod, tube & shapes | |
| Type 1 Dielectric testing required, (extra cost) | |
| Type 2 Physical Properties apply, no extra testing required | |
| AMS 3668C Virgin unfilled Molded Rod, Tube, Shapes; Testing required | |
| Type 1 Dielectric & Physical tests required | |
| Type 2 4000 psi physical test required | |
| AMS 3678 Virgin molded or extruded rods, tube, unfilled; pigmented | |
| Type 1 Virgin only | |
| Filled PTFE Molded & Extruded Rods | ASTM D 4745-01 Molded and extruded Filled Compounds |
| Type 1 15% Glass Fiber | |
| Type 2 25% Glass Fiber | |
| Type 3 35% Glass Fiber | |
| Type 4 5% Glass, 5% MoS2 (Moly) | |
| Type 5 15% glass, 5% MoS2 (Moly) | |
| Type 6 10% Graphite | |
| Type 7 15% Graphite | |
| Type 8 25% Carbon, graphite (LCG 3030) | |
| Type 9 32% Carbon, Graphite | |
| Type 10 40% Bronze | |
| Type 11 60% Bronze | |
| Type 12 55% Bronze, 5% MoS2 (Moly) | |
| Type 13 50% Stainless Steel | |
| AMS 3678 Molded and Extruded Filled Rod and shapes | |
| Type 1 Virgin PTFE | |
| Type 2 15% Graphite | |
| Type 3 15% Glass Fiber, 5% MoS2 (Molly) | |
| Type 4 25% Glass Fiber | |
| Type 5 inorganic pigments | |
| Type 6 60% Bronze Powder | |
| Extruded hexagonal and square stock: | AMS 3651 replaced by AMS 3667 |
| AMS 3656 | |
| Mil-C-17 (for type F dielectric) | |
| Mil-P-19468 | |
| Extruded Sheet: | AMS 3651C |
| L-P-403A | |
| Mil-P-22241A replaced by ASTM D 3293, withdrawn and replaced with ASTM D 3294 | |
| Molded Sheet: | ASTM D 3294 Type 2, Grade 1, Class B or C |
| 1/4″ thick and over | ASTM D 4894 ” Resin Specification” Type IV resin properties |
| AMS 3651, Replaced by AMS 3667 | |
| AMS 3667 Molded Sheet | |
| Type 1 requires additional testing cost | |
| Type 2 no testing required, less test and reports | |
| AMS 3669 Molded Sheet | |
| Type 1 requires additional testing cost | |
| Type 2 no testing required, less test and reports | |
| AMS 2491 Etched PTFE process | |
| Skived Virgin PTFE Sheet: | ASTM D 3308 Type 2, Grade 1 |
| L-P-403A Cancelled & replaced by ASTM D 1457, Cancelled and Replaced by ASTM D 3308 | |
| Mil-P-22241B replaced by ASTM D 3293, withdrawn and replaced by ASTM 3308 | |
| ASTM D 4894 Type II resin specification only | |
| ASTM D3369 .001″ – .005″ Cast Film, (special quote) | |
| AMS 3652 Film, Non-Critical | |
| AMS 3662 General Purpose Film, Will Certify plus testing cost | |
| Other Certifications (Partial list) | FDA 21 CFR 177.1550 |
| RoHS Compliant | |
| REACH Compliant | |
| Mercury Free | |
| NSF 61(*) | |
| W270 Drinking Water (Virgin PTFE) |