Kaxite Sealing manufactures PTFE fiber from 100% virgin PTFE polymer as multifilament high-tenacity yarn in standard deniers 200, 400, 800, 1200 and 2000. Tensile strength ≥3.5 g/denier, tenacity ≥3.0 cN/dtex, elongation at break 10–25%, coefficient of friction 0.05–0.10 and dielectric strength above 40 kV/mm. Service temperature -268 to +260 °C with no melting point, chemically inert across pH 0–14, moisture regain approximately 0% and outstanding UV resistance. Supplied as multifilament yarn, staple fiber, needle felt and woven fabric. FDA 21 CFR 177.1550 compliant grades. Used in braided packing, high-temperature filter bags, electrical sleeving, expansion joints, medical sutures and composite reinforcement. Free samples, bulk wholesale and 7–15 day lead times.
Beyond generic "PTFE is chemical resistant" claims, four properties determine whether PTFE fiber succeeds or fails in braided packing, high-temperature filtration or electrical insulation. These are the four we engineer for.
Tensile strength ≥3.5 g/denier and tenacity ≥3.0 cN/dtex — engineered for weaving, braiding and sewing without filament breakage or fraying.
Braiding · Weaving · SewingContinuous service from -268 °C to +260 °C with no melting point — degradation only above 327 °C. Does not become brittle at cryogenic temperatures.
Cryogenic · High-heat · Filter mediaInert to virtually all industrial chemicals, solvents and acids — including aqua regia and fuming sulfuric acid. Chemically stable across pH 0–14.
Chemical · Petrochemical · PharmaNaturally repels water and oils with approximately 0% moisture regain. Carbon-fluorine bonds resist UV degradation for decades of outdoor exposure.
Outdoor · Filtration · Architectural
Multifilament high-tenacity yarn from 100% virgin PTFE polymer, plus staple fiber, needle felt and woven fabric forms. Chemically inert, thermally stable and non-flammable — the standard choice for braided packing, high-temperature filtration and electrical insulation.
| Parameter | Specification | Test Method / Notes |
|---|---|---|
| Fiber Type | Multifilament, High-Tenacity | Staple fiber and other forms on request |
| Standard Denier | 200, 400, 800, 1200, 2000 | Custom deniers engineered to specification |
| Tensile Strength | ≥3.5 g/denier | ASTM D2256 |
| Tenacity | ≥3.0 cN/dtex | Strength-to-weight ratio |
| Elongation at Break | 10% – 25% | ASTM D2256 |
| Coefficient of Friction | 0.05 – 0.10 (dynamic, fiber-on-metal) | ASTM D1894 |
| Dielectric Strength | >40 kV/mm | ASTM D149 |
| Continuous Service Temperature | -268 to +260 °C (-450 to +500 °F) | No melting point; degrades above 327 °C |
| Moisture Regain | ~0% | Practically non-hygroscopic |
| Color | Natural white (off-white) | Pigmented fibers available for coding |
Six industries where virgin or blended PTFE fiber replaces aramid, glass and graphite yarns in braided packing, filtration and electrical insulation.
Pumps, valves and agitators in chemical, pharmaceutical and power generation industries. Handles abrasive slurries and corrosive fluids. See our PTFE packing for finished braided gland packing.
Needle felts and woven fabrics for baghouse filters in cement kilns, incinerators and coal-fired boilers. Pairs with our PTFE filter bag for finished filtration media.
Sleeving, lacing cords and woven tapes for wire and cable insulation in aerospace, automotive and high-temperature electronics.
Woven fabrics for industrial expansion joints, pump diaphragms and valve seals requiring flexibility, chemical resistance and long fatigue life. Pairs with our PTFE hoses in flexible connection lines.
Sutures, surgical meshes and ligament repairs due to biocompatibility and strength. USP Class VI grades available. See our pure PTFE gaskets for sterile process equipment.
Reinforcing fiber in PTFE-coated fabrics, architectural membranes and conveyor belts. Enhances tear strength and dimensional stability. Pairs with our expanded PTFE tape in sealing applications.
PTFE fiber is a textile product, spun into continuous filaments or staple fibers that can be woven, braided or felted — a linear, high-strength yarn. Expanded ePTFE is a microporous membrane created by stretching PTFE, with a node-and-fibril structure. Fiber form offers superior tensile strength and abrasion resistance for mechanical applications; ePTFE excels at membrane filtration and waterproof breathability.
Standard PTFE fiber is difficult to dye using conventional processes due to extreme chemical inertness. We offer pigmented fibers by adding heat-stable inorganic pigments during polymerization or spinning — commonly black, gray and other colors — with color integrated throughout the material so it does not wear or wash off.
Pure virgin PTFE polymer is biologically inert and FDA compliant for food contact under specific conditions. For medical implants, expanded PTFE fiber has a long history of use as vascular grafts. Compliance is application-specific — we can provide USP Class VI testing or FDA compliance statements for sensitive applications.
Low friction coefficient and high stiffness compared to natural fibers can pose challenges. Use specialized needles (spear point), reduce machine tension and consider a light finish or sizing to improve processability. For weaving, appropriate loom settings and heddle / reed selection are crucial. Our technical team provides processing guidelines.
Outstanding. Unlike many polymers that chain-scission and embrittle under sunlight, carbon-fluorine bonds in PTFE are highly resistant to UV degradation. This makes PTFE fiber ideal for outdoor architectural fabrics, solar panel components and any application requiring decades of exposure without loss of mechanical properties.
Yes, it is commonly blended or co-woven with aramid (Kevlar), fiberglass or PBI to create hybrid materials. Blending with aramid increases cut resistance; combining with fiberglass enhances compressive strength in a composite. We can collaborate on developing custom hybrid yarns for specific performance profiles.
Send us your fiber form (multifilament yarn, staple fiber, needle felt or woven fabric), denier, filament count, color, quantity, operating temperature, chemical media and any certifications required (FDA, USP Class VI) — or a finished-part drawing. Our export team replies within 24 hours and confirms specification, lead time, packaging and documentation before you place a bulk order.
