Kaxite Sealing manufactures PTFE sheet in three forms — compression molded (thick sheet 3–50 mm for gaskets and machining), skived (thin film 0.5–3 mm) and expanded ePTFE (soft, conformable for low bolt load). Virgin PTFE density 2.15–2.20 g/cm³, tensile strength 3000–5000 psi, dielectric strength above 60 kV/mm, service temperature -200 to +260 °C, chemically inert across pH 0–14. Four filled grades available: 25% glass, 15% carbon, 40% bronze and 5% MoS2 — each engineered for a distinct combination of wear resistance, PV limit and thermal conductivity. Standard sheet sizes 1000×1000 mm and 1200×1200 mm, custom sizes and CNC-cut gaskets to drawing. FDA 21 CFR 177.1550 compliant grades, free samples and 7–15 day lead times.
Each manufacturing form is engineered for a distinct combination of thickness, tolerance and mechanical property. Use this guide to shortlist the right form before requesting a quotation.
Thick sheet 3–50 mm for gaskets, backing rings and precision machining. Highest density and tensile strength — the standard for demanding mechanical duties.
Thick gaskets · Precision machining · High loadThin film 0.5–3 mm, precision skived for tight tolerance. Flexible and easy to cut — the standard form for flange gaskets, linings and insulators.
Thin gaskets · Linings · Electrical insulationSoft, highly conformable structure for low bolt load sealing. Multi-directional strength and excellent creep resistance for delicate flanges and glass-lined equipment.
Low bolt load · Fragile flanges · Chemical sealing
Available in compression molded, skived and expanded ePTFE forms from virgin PTFE or filled compounds. Chemically inert, non-stick and self-lubricating — the standard choice for gaskets, linings, insulators and precision-machined components.
Each grade is engineered for a distinct combination of wear resistance, PV limit, thermal conductivity and chemical purity. Use this data table to shortlist the right compound before requesting a quotation.
| Property | Virgin PTFE | 25% Glass | 15% Carbon | 40% Bronze |
|---|---|---|---|---|
| Density (g/cm³) | 2.15 – 2.20 | 2.25 – 2.30 | 2.10 – 2.15 | 3.00 – 3.10 |
| Tensile Strength (psi) | 3,000 – 5,000 | 2,500 – 3,500 | 2,200 – 3,000 | 2,000 – 2,800 |
| Elongation at Break (%) | 300 – 500 | 200 – 300 | 150 – 250 | 100 – 200 |
| Coefficient of Friction | 0.05 – 0.10 | 0.10 – 0.15 | 0.08 – 0.12 | 0.12 – 0.18 |
| PV Limit (psi × fpm) | 1,000 – 2,000 | 8,000 – 12,000 | 7,000 – 10,000 | 15,000 – 25,000 |
| Service Temperature | -200 ~ +260 °C | -200 ~ +260 °C | -200 ~ +260 °C | -200 ~ +260 °C |
| Primary Applications | Chemical linings · Seals · Insulators | Bearings · Bushings · Wear pads | Fuel / oil seals · Conductive parts | High-load bearings · Thrust washers |
Six industries where virgin, filled or expanded PTFE sheet replaces rubber, metal or graphite in sealing, lining and insulating duty.
Gaskets, tank linings, pipe linings, bellows and spacer rings in pumps and valves handling corrosive fluids. Pairs with our pure PTFE gaskets for flanged joints.
Non-stick conveyor belts, wear plates, seals and guides where hygiene and FDA 21 CFR 177.1550 compliance are mandatory. Zero extractables and no oil carry-over.
Seals and diaphragms in sterile processing equipment where high purity and cleanability matter. USP Class VI grades available on request. See our PTFE envelope gaskets for sanitary flanges.
Insulating spacers, coil bobbins, wafer carriers and high-frequency circuit components. Dielectric strength above 60 kV/mm. Pairs with our PTFE tubes for full flow-path purity.
Fuel system seals, O-rings, bearing pads and insulating components in engines and airframes. Wide temperature stability from cryogenic to +260 °C.
Wear strips, slide plates and low-friction liners for chutes and hoppers. Bronze-filled grades for high PV; carbon-filled grades for conductive duty. Pairs with our PTFE packing in dynamic sealing assemblies.
Virgin PTFE sheet is 100% pure resin — best chemical resistance, electrical properties and lowest friction. Filled PTFE sheet incorporates glass, carbon, graphite or bronze to significantly improve wear resistance, creep resistance and thermal conductivity, but slightly reduces chemical resistance and increases friction. The choice depends on whether absolute chemical inertness or enhanced mechanical performance is the priority.
Compression molded sheet (3–50 mm) offers the highest density and tensile strength for thick gaskets and precision machining. Skived sheet (0.5–3 mm) is precision cut for thin gauges, flexible and easy to fabricate. Expanded ePTFE sheet is soft, conformable and multi-directionally strong — ideal for low bolt load and fragile flanges.
Yes. PTFE sheet material machines with standard workshop tools — cut, drilled, turned, milled and punched — though sharp tooling is recommended for clean edges. Kaxite Sealing supplies sheets in multiple thicknesses and can provide custom pre-fabricated parts based on customer drawings, saving time and reducing material waste.
PTFE remains flexible and functional down to -200 °C and stable up to +260 °C continuously, with short-term peaks up to 300 °C. Unlike many plastics it does not become brittle at cryogenic temperatures. Above 260 °C it begins to slowly degrade and release fumes — always consider the specific application temperature when selecting a grade.
Virgin, high-purity PTFE that is properly processed is generally recognized as safe for food contact and complies with FDA 21 CFR 177.1550. It is inert, non-toxic and does not leach into food products. Always source from a reputable manufacturer who can provide documentation and confirm the material is free from processing aids that could contaminate food.
Store in a cool, dry place away from direct sunlight and heat sources. Keep sheets flat to prevent curling or warping, especially thinner skived films. While chemically resistant, keep surfaces clean from contaminants before fabrication. No special handling precautions are needed beyond standard workshop safety for cutting and machining.
Send us your sheet form (molded, skived or expanded ePTFE), thickness, sheet size, material grade (virgin, glass-filled, carbon-filled or bronze-filled), quantity, operating media, temperature and pressure — or a finished-part drawing. Our export team replies within 24 hours and confirms grade selection, lead time, packaging and documentation before you place a bulk order.
