High-Quality Expanded PTFE Sheet Solutions for Bulk OEM and ODM Manufacturing in China
Expanded PTFE Sheet – High-Performance Sealing & Gasket Material for Demanding Applications
Kaxite Sealing, a leading expanded PTFE sheet manufacturer in China, supplies premium ePTFE sheets engineered for superior sealing performance in the most demanding industrial environments. Our expanded polytetrafluoroethylene sheets are manufactured through a proprietary stretching and sintering process that creates a microporous structure of interconnected fibrils and nodes – delivering exceptional conformability, compressibility, and chemical resistance while retaining the inherent non‑stick and thermal stability of PTFE. With a service temperature range of -240°C to +315°C, densities from 0.4 to 0.9 g/cm³, and outstanding stress relaxation (<25% after 24 hours), Kaxite ePTFE sheets provide reliable, leak‑free sealing for flanges, heat exchangers, pumps, and valves in chemical processing, petrochemical, semiconductor, pharmaceutical, and power generation industries. Available in multiple grades – virgin, filled, adhesive‑backed, and laminated – with standard sheet rolls, cut sheets, tapes, and custom die‑cut parts. ISO 9001:2015 certified, with full traceability and competitive factory pricing – request a free sample or bulk quote today.
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Microporous Structure
Expanded matrix provides superior conformability and sealing on irregular surfaces.
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Chemical Inertness
Resistant to virtually all industrial chemicals, acids, alkalis, and solvents.
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Extreme Temperature Range
Continuous service from -240°C to +315°C – ideal for cryogenic and high‑heat environments.
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Low Stress Relaxation
<25% relaxation after 24h – maintains sealing force over time.
Expanded PTFE Sheet Grades – Selection Guide
Kaxite offers a comprehensive range of ePTFE sheet grades to match your specific sealing requirements, from high‑purity chemical service to high‑load flange applications.
| Grade Code | Composition | Density (g/cm³) | Compressibility (%) | Recovery (%) | Key Application |
|---|---|---|---|---|---|
| KX-ePTFE-PURE | 100% Virgin ePTFE | 0.6 – 0.9 | 20 – 35% | 45 – 55% | Chemical processing, semiconductor, pharmaceutical |
| KX-ePTFE-FILLED | ePTFE + Graphite/Carbon | 0.7 – 0.9 | 15 – 25% | 50 – 60% | High‑load flanges, heat exchangers, color‑coded systems |
| KX-ePTFE-ADH | ePTFE + PSA Backing | 0.5 – 0.8 | 25 – 40% | 40 – 50% | EMI/RFI shielding, cabinet seals, vibration damping |
| KX-ePTFE-LAM | ePTFE Laminated to Rubber/Foam | Varies | Varies | Varies | Automotive, aerospace, electronics enclosures |
Custom formulations and hybrid grades available for specialized applications. Contact our engineering team for assistance.
📋 Physical Properties (Typical Range)
| Density | 0.4 – 0.9 g/cm³ |
| Tensile Strength (MD) | 15 – 40 MPa |
| Tensile Strength (XD) | 10 – 30 MPa |
| Elongation at Break | 50 – 300% |
| Compressibility | 15 – 40% |
| Recovery | 40 – 60% |
| Stress Relaxation (24h @ RT) | < 25% |
| Operating Temperature | -240°C ~ +315°C |
*Values vary with density and expansion ratio. Contact us for grade‑specific data.
📐 Standard Dimensions & Forms
Kaxite offers expanded PTFE sheets in a variety of forms for convenience and efficiency:
- ▸ Sheet Rolls: Width 1m – 1.5m, continuous lengths up to 50m
- ▸ Cut Sheets: 1m×1m, 1.2m×1.2m, 1.5m×1.5m (custom sizes available)
- ▸ Tapes & Strips: Slit to specific widths, with or without adhesive
- ▸ Die‑Cut Parts: Custom gaskets and seals to your CAD drawings
OEM/ODM – provide drawings for a fast, accurate quotation.
🏭 Typical Applications
- ▸ Chemical Processing: Flange gaskets, pump and valve seals, heat exchanger gaskets
- ▸ Pharmaceutical & Biotechnology: Sanitary gaskets, sterile barrier seals
- ▸ Semiconductor & Electronics: Ultra‑pure chemical seals, dielectric insulation
- ▸ Oil & Gas / Petrochemical: High‑pressure pipeline flanges, compressor seals
- ▸ Power Generation: Turbine and boiler gaskets, thermal insulation
- ▸ Filtration & Venting: Breathable membranes, water‑proof barriers
Explore our full range of expanded PTFE products and PTFE gaskets.
🏅 Why Source from Kaxite?
- ✔ China-based ePTFE expert – 25+ years of fluoropolymer manufacturing.
- ✔ ISO 9001:2015 certified – consistent quality and full traceability.
- ✔ Proprietary expansion technology – uniform microstructure and porosity.
- ✔ Wholesale factory pricing – competitive for bulk and OEM orders.
- ✔ Exported to 40+ countries – reliable logistics (FOB Ningbo / CIF).
🏗️ Proprietary Expansion & Sintering Technology
Our advanced manufacturing process ensures uniform expansion, consistent pore structure, and exceptional mechanical properties across every batch. Each production lot is rigorously tested for density, tensile strength, compressibility, and recovery to guarantee reliable performance in critical applications.
ISO 9001:2015 Full Traceability
📦 How to Order Expanded PTFE Sheets – OEM & Bulk
1 Select Grade
PURE, FILLED, ADH, or custom formulation.
2 Specify Size
Thickness, width, length – custom dimensions accepted.
3 Quantity
Low MOQ – from prototypes to high‑volume production.
4 Shipping
FOB Ningbo, CIF, or EXW – express air or sea freight.
Frequently Asked Questions
Q: What is the difference between expanded PTFE and standard PTFE sheet?
A: Standard PTFE is a solid, non‑porous material with relatively high creep. Expanded PTFE has a microporous structure that provides superior conformability, compressibility, tensile strength, and reduced stress relaxation – making it a far more effective sealing material.
Q: How do I select the correct density for my gasket application?
A: Lower density (0.4‑0.6 g/cm³) is ideal for sealing uneven or warped flanges. Medium density (0.6‑0.8 g/cm³) offers a balance of conformability and strength. Higher density sheets provide maximum structural integrity for high‑pressure systems.
Q: Is ePTFE sheet suitable for food or pharmaceutical contact?
A: Yes, pure expanded PTFE is biologically inert and meets FDA, USP Class VI, and EU regulations for food and medical device contact. Kaxite's KX-ePTFE-PURE grade is ideal for these sensitive industries.
Q: Do you provide material certificates?
A: Absolutely. Every batch is supplied with a material test certificate detailing density, tensile strength, compressibility, recovery, and other key properties per international standards.
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