Modified PTFE Sheet
Model:KXT B4000Range
Modified PTFE Sheets are in order to meet the needs of customers to different working conditions, and reduce the cost. Kaxite research and design the modified ptfe sheets.
Modified PTFE Sheet – Engineered for Superior Creep Resistance & Sealing Performance
Kaxite Sealing, a leading China modified PTFE sheet manufacturer, offers advanced modified PTFE sheets engineered to overcome the inherent limitations of virgin PTFE – specifically creep relaxation and cold flow. By incorporating specially formulated fillers such as glass microspheres, barium sulfate, and glass fiber, our modified PTFE sheets deliver significantly improved bolt torque retention, reduced creep, and enhanced dimensional stability while maintaining the exceptional chemical resistance and wide temperature range (–196 °C to +260 °C) of pure PTFE. These high-performance gasket sheets are the preferred choice for demanding sealing applications in chemical processing, pharmaceutical, cryogenic, and petrochemical industries where sealing integrity under fluctuating pressure and temperature is critical.
What sets Kaxite apart? As a professional modified PTFE sheet factory in China, we employ advanced compounding and compression moulding technologies to ensure uniform filler dispersion and consistent material properties across every sheet. Our R&D team works closely with customers to develop custom formulations that meet specific application requirements – whether you need enhanced chemical resistance, improved wear properties, or optimized sealing performance for low bolt load applications. Every production lot undergoes rigorous testing for density, tensile strength, creep relaxation, and sealing performance to guarantee reliable operation in your most critical applications. Our ISO 9001:2015 certified facility ensures every modified PTFE sheet meets the highest quality standards.
With our custom OEM/ODM capabilities, we supply modified PTFE sheets in virtually any size and thickness – from standard sheets for gasket cutting to custom formulations for specialized equipment. Whether you need bulk wholesale quantities for industrial maintenance or custom-engineered sheets for demanding applications, Kaxite Sealing is your trusted PTFE sheet supplier. Request a free sample or get a bulk quote today.
Temp. Range–196 to +260 °C
Creep ResistanceSignificantly Improved
Bolt Torque RetentionExcellent
Chemical ResistancepH 0–14 (most media)
Available FillersGlass Microspheres, BaSO₄, Glass Fiber
Max Sheet SizeUp to 2000 x 2000 mm
Why Choose Kaxite Modified PTFE Sheets?
Superior Creep Resistance – Modified formulations significantly reduce creep relaxation and cold flow compared to virgin PTFE – maintains gasket integrity under sustained bolt load
Excellent Bolt Torque Retention – Engineered to maintain sealing pressure over time – reduces the need for frequent re-torquing and extends maintenance intervals
Broad Chemical Compatibility – Retains PTFE's exceptional chemical resistance – suitable for acids, alkalis, solvents, hydrocarbons, cryogenic fluids, and steam
Custom Filler Options – Available with glass microspheres, barium sulfate, glass fiber, and other fillers – tailored to your specific application requirements
Cost-Effective Performance – Longer service life reduces replacement frequency and downtime – provides excellent value for critical sealing applications
China Manufacturing Excellence – Produced in our ISO 9001:2015 certified facility – advanced production capabilities ensure consistent quality and competitive pricing
Modified PTFE Grades – Choose the Right Formulation
We offer three standard modified PTFE grades, each engineered with a specific filler to address different sealing challenges. Custom formulations are also available for your unique requirements.
Glass Microspheres Style KXT500 – Blue
- Excellent creep resistance and bolt torque retention
- Reduces product loss and waste
- Ideal for moderate acids, caustics, cryogenics, hydrocarbons, refrigerants, water, and steam
Barium Sulfate (BaSO₄) Style KXT533
- Superior chemical resistance for strong caustics and chlorine
- Excellent for cryogenic applications and aluminum fluoride
- Ideal for moderate acids, hydrocarbons, gases, water, and steam
Glass Fiber Style KXT611 – Blue
- Excellent chemical compatibility with strong caustics and acids
- Ideal for low bolt load applications and glass-lined equipment
- Suitable for hydrocarbons, plastic piping, chlorine, and cryogenics
Technical Specifications
| Property | Value / Range | Test Standard |
|---|---|---|
| Material | PTFE + Modified Filler (Glass Microspheres / BaSO₄ / Glass Fiber) | — |
| Temperature Range | –196 °C to +260 °C | Internal |
| Density | 2.10 – 2.40 g/cm³ (grade dependent) | ASTM D792 |
| Tensile Strength | ≥ 12 MPa | ASTM D638 |
| Creep Relaxation | Significantly reduced vs. virgin PTFE | Internal |
| Bolt Torque Retention | Excellent | Internal |
| Available Thickness | 1.5 – 120 mm (custom) | — |
| Max Sheet Size | 2000 x 2000 mm (custom) | — |
* Values are typical and may vary with filler content and manufacturing process. Request full technical data for your specific grade.
Typical Applications & Industries
Chemical Processing Flange gaskets for pipes, reactors, and vessels handling moderate acids, caustics, hydrocarbons, and chlorine – modified PTFE provides superior chemical resistance and creep resistance.
Also explore our PTFE sheet range for other sealing applications.
Pharmaceutical & Biotech Sanitary flange seals and equipment gaskets – modified PTFE grades meet FDA requirements for food-contact and pharmaceutical applications.
Cryogenic & Low-Temperature Sealing for LNG, liquid nitrogen, and other cryogenic applications – modified PTFE maintains flexibility and sealing integrity at –196 °C.
Petrochemical & Refining Gaskets for pipelines, heat exchangers, and pressure vessels – excellent bolt torque retention ensures long-term sealing under thermal cycling.
Glass-Lined Equipment Low bolt load sealing for glass-lined reactors and vessels – glass fiber filled grade prevents damage to fragile glass surfaces.
Food & Beverage FDA-compliant grades for processing equipment, piping, and storage tanks – non-stick and easy to clean.
Product Gallery
Glass Microspheres Filled (KXT500)
Barium Sulfate Filled (KXT533)
Glass Fiber Filled (KXT611)
Quality Assurance & Industry Compliance
Kaxite Sealing operates an ISO 9001:2015 certified manufacturing facility in China. Our modified PTFE sheets are produced under strict process controls – from raw material compounding and moulding to post-cure annealing and final inspection. Every batch is tested for density, tensile strength, creep relaxation, and dimensional accuracy to ensure consistent quality. We provide material test certificates with every shipment, ensuring full traceability from raw material to finished sheet.
- ISO 9001:2015 Certified
- Premium PTFE Resin
- FDA 21 CFR 177.1550 (on request)
- REACH & RoHS Compliant
- Full Material Traceability
Trusted by engineers worldwide – our modified PTFE sheets are specified in projects across 40+ countries, backed by responsive technical support and fast global delivery from our China factory.
Customisation & OEM Services – Get a Free Quote from China's Leading Manufacturer
As a professional modified PTFE sheet supplier in China, we offer complete customisation to meet your exact requirements. Request a free sample or bulk quote today:
- Custom filler type and ratio
- Custom sheet size (up to 2000 x 2000 mm)
- Custom thickness (1.5 – 120 mm)
- FDA-compliant grades (on request)
- Bulk wholesale pricing for volume orders
- PTFE machining and custom components
Get a free sample or request a tailored bulk quote – our team responds within 24 hours with competitive China factory pricing and lead-time estimates.
Frequently Asked Questions
- Q: What is modified PTFE and why is it better than virgin PTFE for sealing applications?
- A: Modified PTFE is a PTFE-based material enhanced with special fillers such as glass microspheres, barium sulfate, or glass fiber. These fillers significantly reduce creep relaxation and cold flow – the primary limitations of virgin PTFE – while improving bolt torque retention and dimensional stability. This makes modified PTFE ideal for critical sealing applications where maintaining gasket compression over time is essential. As a leading China modified PTFE sheet manufacturer, Kaxite offers tailored formulations to meet your specific requirements.
- Q: What filler options are available for modified PTFE sheets?
- A: We offer three standard modified PTFE grades: Glass Microspheres (KXT500) – ideal for general-purpose sealing with excellent creep resistance; Barium Sulfate (KXT533) – designed for strong caustics and cryogenic applications; and Glass Fiber (KXT611) – optimized for low bolt load and glass-lined equipment. Custom formulations are also available upon request. Contact us to discuss your specific application.
- Q: Is modified PTFE FDA-compliant for food contact?
- A: Yes. We offer FDA 21 CFR 177.1550 compliant modified PTFE grades for food-contact and pharmaceutical applications. Please specify the FDA requirement when ordering and we will provide the appropriate certification documentation. Our China factory can produce FDA grades with custom formulations.
- Q: What sizes and thicknesses are available?
- A: We manufacture modified PTFE sheets from 1.5 mm to 120 mm thick, with maximum dimensions of 2000 mm x 2000 mm. Custom sizes and shapes are available upon request. Contact us with your requirements for a quick quote and competitive China factory pricing.
- Q: Can modified PTFE be used in cryogenic applications?
- A: Absolutely. Modified PTFE sheets operate continuously from –196 °C to +260 °C. Grades like KXT533 (barium sulfate filled) and KXT500 (glass microspheres) are particularly well-suited for cryogenic applications including LNG, liquid nitrogen, and other low-temperature services.
- Q: Do you provide samples before bulk orders?
- A: Yes. We supply free material samples for you to evaluate quality, creep resistance, and sealing performance. Request a free sample – sample orders are processed within 3–5 working days from our China factory.
Partner with Kaxite Sealing – your trusted modified PTFE sheet manufacturer in China. With decades of PTFE compounding and moulding expertise, advanced manufacturing capabilities, and an unwavering commitment to quality, we deliver modified PTFE sheets that perform reliably in the most demanding sealing applications. Request a free sample or get a tailored bulk quote today – our engineers respond within 24 hours.
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Contact Info
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Address
No. 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
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