Kaxite Sealing manufactures PTFE skived sheet by precision-peeling a continuous film from a compression-molded and sintered PTFE cylinder. The process aligns the polymer in the machine direction, producing thin, uniform, stress-free sheet with a smoother surface and tighter thickness tolerance than molded or calendered sheet — ideal for gasket cutting, lining and electrical insulation where 0.1–5.0 mm precision matters. We supply virgin white as standard, plus glass, carbon, graphite and bronze-filled grades. Procurement teams choose us for factory-direct bulk pricing, documented traceability and 7–15 day lead times.
Three PTFE sheet formats, three different jobs. Choosing the right one up front saves you tooling time and scrap.
Continuous-peeled from a compression-molded PTFE cylinder, producing a thin uniform sheet with consistent thickness and fewer surface defects than molded sheet. Available in 4 grades — 53-G (virgin), GF (glass fiber), C (carbon) and B (bronze). Thickness tolerance is +0/−0.03 mm at 0.5 mm and +0/−0.10 mm at 6 mm. One-side or two-side etched surface available for adhesive bonding.
Precision-peeled virgin PTFE with tighter thickness tolerance and smoother surface than molded or expanded PTFE. Sheet thickness 0.5–10 mm (down to 0.25 mm on request), sheet sizes 1M×1M, 1.2M×1.2M and 1.5M×1.5M, plus roll format at 1M×50M, 1.2M×50M and 1.5M×50M. Service temperature −260 °C to +260 °C, density 2.14–2.20 g/cm³, dielectric strength above 45 kV/mm.
| Property | ASTM Method | Metric | Imperial | Typical Value |
|---|---|---|---|---|
| Density | D792 | g/cm³ | lb/in³ | 2.14 – 2.20 |
| Tensile Strength | D638 | MPa | psi | 20 – 35 |
| Elongation at Break | D638 | % | % | 200 – 400 |
| Compressive Strength | D695 | MPa | psi | 12 – 15 |
| Flexural Modulus | D790 | MPa | psi | 500 – 700 |
| Izod Impact (Notched) | D256 | J/m | ft-lb/in | 160 – 190 |
| Hardness (Shore D) | D2240 | Scale D | Scale D | 50 – 60 |
| Friction Coefficient (dynamic) | D1894 | — | — | 0.05 – 0.10 |
| Thermal Conductivity | C177 | W/m·K | BTU·in/(hr·ft²·°F) | 0.24 – 0.26 |
| Linear Thermal Expansion | D696 | 10⁻⁵/°C | 10⁻⁵/°F | 12 – 16 |
| Service Temperature | — | °C | °F | -200 to +260 |
| Dielectric Strength | D149 | kV/mm | V/mil | 40 – 60 |
100% pure PTFE. Ultimate chemical purity, best electrical insulation, FDA compliant. For aggressive chemical gaskets, semiconductor liners and food processing seals.
15–25% glass fibre. Improved compressive strength, reduced creep and better wear resistance. For heavy-duty gaskets, bushings and thrust washers.
Superior wear resistance, thermal conductivity and anti-static properties. For piston rings, compressor rings and dry-running seals.
Enhanced lubrication, lower friction and improved thermal conductivity. For packing rings, valve seats and self-lubricating applications.
Greatly improved thermal conductivity and wear resistance, high load-bearing capacity. For bearings at high loads and low speeds, plus wear plates.
One-side or two-side etched surface for reliable adhesive bonding to metal, rubber or foam. Supplied with controlled etch depth to preserve mechanical properties.
The skiving process produces a sheet that sits flat, cuts clean and holds tight gauge — exactly what you need when downstream operations are die-cutting, waterjet cutting or laminating. Skived sheet also bonds reliably after sodium etching, making it the base material of choice for adhesive-backed gaskets, slide pads and diaphragm seals.
Die-cut into pure PTFE gaskets and lined envelope constructions for chemical, oil & gas and pharmaceutical service.
Hot-bonded to steel or FRP vessels via sodium-etched backing. Full pH 0–14 inertness for pickling tanks and reactors.
Barriers, slot liners and coil insulation. Dielectric strength 40–60 kV/mm across a wide frequency range.
Heat-sealing bars, chute liners and packaging belts where release and cleanability matter. FDA grade available.
Supplied pre-etched and laminated to pressure-sensitive adhesive for slide bearings and low-friction pads.
Used as the barrier ply in pump and valve diaphragms. Pairs with our expanded PTFE sheet in hybrid constructions.
Thickness, sheet size, roll or cut sheet, grade, etch requirement, annual volume or drawing.
Our engineers confirm virgin vs. filled grade based on media, load and temperature before quoting.
Free cut samples of standard grades and etched variants for bonding and die-cutting trials.
7–15 days for standard stock; FOB Ningbo / Shanghai, CIF and DDP available. Inspection report with every shipment.
Skived sheet is continuously peeled from a molded cylinder, which produces thin, uniform gauge, a smoother surface and tighter thickness tolerance than molded sheet. It is denser and less porous than calendered sheet, giving better sealing performance and creep resistance. For thin gaskets, liners and electrical barriers, skived is generally the most cost-effective format.
Our standard tolerance is +0/−0.03 mm at 0.5 mm thickness and +0/−0.10 mm at 3–6 mm. This is significantly tighter than calendered or molded sheet and is one of the main reasons skived sheet is specified where consistent compression across a gasket is critical.
Yes. Skived sheet cuts, punches, stamps and die-cuts cleanly with standard workshop tooling. Keep blades sharp — PTFE is soft and will deform rather than cut with dull edges. For turning or milling, use sharp carbide tooling with high cutting speeds and low feed rates.
Creep is the tendency of a material to deform permanently under sustained load. Virgin PTFE is prone to creep, especially in bolted flange joints. Adding glass fibre, carbon, graphite or bronze significantly improves compressive strength and reduces creep, making filled grades the right choice for bearing plates, thrust washers and high-load gasket service.
For pure oxygen and strong oxidisers at elevated temperature and pressure, specially processed and tested grades are needed. Disclose the full operating conditions to our technical team before specifying — we supply dedicated oxygen-service material on request.
PTFE is easy to clean — most contaminants wipe off. For thorough cleaning, use warm water with a mild detergent or isopropyl alcohol. Avoid abrasive pads that could scratch the surface. Store flat in a cool, dry, dark place away from direct sunlight, and keep sheets in their original packaging until use to avoid contamination.
Yes, but the surface must be pretreated. Sodium-etching (sodium naphthalenide) or plasma treatment is required to create a bondable surface. After treatment, standard epoxy and acrylic adhesives bond reliably. We can supply pre-etched sheet or finished laminated components to your specification.
Yes. Precision fabrication is a core service. We die-cut, waterjet cut and CNC-machine finished gaskets, seals, washers and liners from skived sheet to your drawings — reducing your lead time and eliminating scrap on your side. Send your drawing for a quotation.
Send us your thickness, sheet size, grade, etch requirement, annual volume or 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.
