PTFE modified material is a reinforced polytetrafluoroethylene compound produced by compounding virgin PTFE suspension resin with functional fillers such as glass fiber, carbon fiber, graphite, bronze, molybdenum disulfide (MoS2), or barium sulfate (BaSO4). The result is a machinable material that keeps PTFE's chemical inertness and low friction while significantly improving compressive strength, creep resistance, thermal conductivity, and dimensional stability under load.
As a direct PTFE modified material manufacturer, Kaxite Sealing supplies filled PTFE compound in molded and skived form, machined into PTFE rods, PTFE sheets, PTFE tubes, seals, gaskets, bearing pads, and custom PTFE parts for mechanical seals, chemical processing equipment, valves, pumps, and precision instruments.
The performance of modified PTFE depends on the filler system. Kaxite Sealing supplies standard filled PTFE grades and custom formulations based on application requirements, including glass filled PTFE, carbon filled PTFE, graphite filled PTFE, and bronze filled PTFE.
| Filler | Content Range | Key Improvement | Typical Application |
|---|---|---|---|
| Glass Fiber | 15% – 25% | Compressive strength, creep resistance, dimensional stability | Hydraulic seals, valve seats, bearing pads |
| Carbon Fiber | 10% – 25% | Wear resistance, thermal conductivity, load capacity | Mechanical seals, piston rings, guide rings |
| Graphite | 5% – 15% | Low friction, thermal conductivity, chemical resistance | Bearings, valve seals, compressor rings |
| Bronze | 40% – 60% | Thermal conductivity, high load capacity, wear resistance | High-speed bearings, hydraulic applications |
| MoS2 | 3% – 10% | Friction reduction, wear resistance under dry running | Seals for dry running, valve seats |
| BaSO4 | 10% – 30% | Chemical resistance, dielectric strength, surface finish | Food and pharmaceutical seals, electrical insulators |
| Glass Microsphere | 10% – 20% | Dimensional stability, low deformation under load | Precision parts, valve components |
| Polyphenyl / POB | 5% – 15% | Compressive strength, creep resistance at elevated temperature | High-pressure seals, chemical equipment |
Typical performance ranges of Kaxite Sealing modified PTFE material. Actual values depend on filler type, filler content, and processing method.
| Property | Virgin PTFE | Modified PTFE (typical) | Test Standard |
|---|---|---|---|
| Density | 2.14 – 2.20 g/cm³ | 2.15 – 3.90 g/cm³ | ASTM D792 |
| Tensile strength | 25 – 35 MPa | 15 – 30 MPa | ASTM D4745 |
| Compressive strength | 12 MPa | 15 – 40 MPa | ASTM D695 |
| Deformation under load (10 MPa, 24 h) | 10% – 15% | 2% – 8% | ASTM D621 |
| Coefficient of friction | 0.05 – 0.10 | 0.08 – 0.20 | ASTM D1894 |
| Continuous service temperature | -200°C to +260°C | -200°C to +260°C | Material dependent |
| Chemical resistance | Universal (except molten alkali metals and fluorine) | Slightly reduced by filler, still excellent | ASTM D543 |
| Dielectric strength | 40 – 60 kV/mm | 15 – 50 kV/mm | ASTM D149 |
Primary and mating rings for pumps, mixers, and compressors requiring low friction and long service life. Commonly machined from PTFE parts.
Seals, gaskets, and liners exposed to aggressive acids, alkalis, and solvents at elevated temperature. See PTFE gaskets.
Valve seats, ball valve seats, diaphragms, and wear rings for corrosive and high-purity media.
Low-friction slideways and bearing pads requiring dimensional stability and stick-slip resistance.
Sliding bearing pads in bridge construction and heavy equipment requiring load capacity and durability.
Sealing components for high-temperature, high-corrosion pipe systems in energy and process industries, including PTFE packing.
Kaxite Sealing supplies modified PTFE material in multiple forms. Buy PTFE modified material in standard stock shapes or order custom machining to drawing, with bulk pricing and free samples available on request.
Direct control over resin sourcing, filler compounding, molding, and machining — no middleman markups.
Standard grades plus tailored filler systems for specific chemical, thermal, or wear conditions.
Each batch is documented for filler content, density, and mechanical properties.
Filler selection, seal design, and installation guidance from our technical team.
Serving chemical, oil & gas, semiconductor, food, and pharmaceutical customers worldwide.
Technical quotations within 24 hours, free samples for qualified bulk orders.
Send us your application details—media, temperature, pressure, wear conditions, and required form. Our engineers will recommend the correct filler system and provide a technical quotation with sample availability. Wholesale and bulk order pricing available.
Send InquiryAddress
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
