Kaxite Sealing manufactures PTFE rods (Teflon® rods) in virgin, glass-filled, carbon-filled and bronze-filled grades. We supply molded, extruded and isostatically pressed round bars in diameters from 3 mm to 500 mm, cut to length, and machined into finished seals, bushings, valve seats, insulators and wear parts. Procurement teams choose us for factory-direct pricing, documented material traceability and 7–15 day lead times on bulk orders.
Resin, molding, sintering, extrusion and CNC machining all run inside our Ningbo plant. No trading layer, so your PTFE rod price stays stable even on repeat bulk orders.
Every batch ships with resin lot records, density and tensile test reports, plus FDA 21 CFR 177.1550, RoHS and REACH declarations for regulated industries.
Send a drawing or list your diameters and lengths. We return custom PTFE rods and finished machined parts, not just standard stock bars.
Free cut samples for material evaluation, dedicated export packaging, and English-speaking engineers who review your media, load and temperature before quoting.
Precision paste-extruded virgin PTFE rod for high-volume CNC machining of seals, gaskets, valve seats and insulating rings. Density 2.14–2.20 g/cm³, tensile ≥25 MPa, dielectric strength >45 kV/mm, friction coefficient 0.04. FDA 21 CFR 177.1550, RoHS and REACH certified.
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Ram or paste extruded virgin PTFE round bar with consistent diameter tolerance and long standard lengths. Specific gravity 2.14–2.16 g/cm³, service range −200 to +250 °C, tensile 15–25 MPa, elongation 200–400%. Inert across pH 0–14 and more economical than molded rod for small and medium diameters.
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Compression-molded and free-sintered virgin or filled PTFE round bar with homogeneous, stress-relieved structure. Tensile 32.7 MPa, specific gravity 2.14, hardness 58 Shore D, 0% water absorption (ASTM D-570). The preferred choice for large-diameter precision machining and dimensional stability.
View specifications| Property | Test Standard | Unit | Virgin PTFE | Glass-Filled 15% | Bronze-Filled 40% |
|---|---|---|---|---|---|
| Density | ASTM D792 | g/cm³ | 2.15 – 2.20 | 2.20 – 2.30 | 3.00 – 3.20 |
| Tensile Strength | ASTM D638 | MPa (psi) | 25 – 35 (3625 – 5075) | 17 – 20 (2465 – 2900) | 14 – 17 (2030 – 2465) |
| Elongation at Break | ASTM D638 | % | 300 – 500 | 200 – 300 | 150 – 250 |
| Compressive Strength | ASTM D695 | MPa (psi) | 12 (1740) | 20 (2900) | 25 (3625) |
| Coefficient of Friction | ASTM D1894 | — | 0.05 – 0.10 | 0.10 – 0.15 | 0.10 – 0.18 |
| Continuous Service Temp. | — | °C (°F) | -200 to +260 | -200 to +260 | -200 to +260 |
| Dielectric Strength | ASTM D149 | kV/mm | > 60 | > 40 | > 15 |
Maximum chemical purity and dielectric strength, lowest coefficient of friction. Specify for ultra-pure chemical handling, semiconductor wet benches, food-contact parts and high-voltage insulators where FDA 21 CFR 177.1550 or USP Class VI certification is required.
MOQ is negotiable for trial and prototype orders. Free cut samples of standard diameters are available for material evaluation before bulk purchase.
7–15 days for standard rods; longer for custom diameters or machined parts. FOB Ningbo / Shanghai, CIF and DDP terms available. PE-wrapped and export-crated for sea and air freight.
Inspection report with every shipment. Third-party testing (SGS, TÜV) on request. FDA 21 CFR 177.1550, RoHS, REACH documentation and full traceability from resin lot to finished rod.
PTFE rods are machined into finished parts across chemical processing, oil and gas, food and beverage, pharmaceutical, semiconductor, electrical and general engineering sectors. Common components include PTFE gaskets, valve seats, piston rings, thrust washers, slide bearings, bushings and dielectric insulators. PTFE rod stock also feeds our in-house CNC department for custom parts that mirror the drawings you would otherwise source as PTFE sheets or PTFE tubes. You can review the full sector breakdown on our applications page.
Molded rods are compression-molded and sintered, giving isotropic properties and superior dimensional stability — ideal for large diameters. Extruded rods are produced by forcing paste-like PTFE through a die and then sintering, which is more economical for small and medium diameters but can show slight anisotropy. Kaxite supplies both.
Virgin PTFE tends to cold-flow under sustained load, so high-pressure static seals should use filled grades such as glass or bronze, which dramatically reduce creep. Anti-extrusion backup rings in a harder material are also recommended in the seal design.
PTFE has a thermal expansion rate roughly ten times that of steel, so wide-swing applications require allowance for expansion. At cryogenic temperatures PTFE becomes stiffer but remains non-brittle, making it suitable for LNG and aerospace duty.
PTFE is soft and ductile and requires sharp, highly polished carbide tooling. High thermal expansion means tight-tolerance parts should be machined in a temperature-controlled environment. Proper fixturing prevents deformation, and coolants are usually optional.
PTFE is inert to virtually all industrial chemicals, including strong acids, bases and solvents. Only molten alkali metals and certain fluorine compounds at elevated temperature and pressure can affect it — far outside normal industrial use.
Yes. We produce custom-compounded PTFE rods with tailored filler type and percentage to hit specific wear, conductivity or stiffness targets, and can color them with heat-stable pigments. Send your drawing or specification for a quote.
Store horizontally on a flat, supportive surface in a cool, dry place away from direct sunlight and heat. Keep the rods in their original protective packaging until ready for machining to prevent surface contamination or dents.
Yes. Precision fabrication is a core service. We CNC-turn and mill PTFE rods into finished seals, bushings, thrust washers, valve seats and insulators to your drawings, reducing lead time and eliminating material waste on your side.
Send us your diameter, length, grade, annual volume or finished-part drawing. Our export team replies within 24 hours and confirms lead time, packaging and documentation before you place a bulk order.
