Why Choose Kaxite Sealing?

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High-Purity Resin

We source premium PTFE resin from global top brands, ensuring superior chemical stability and mechanical strength.

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Advanced ePTFE Tech

Proprietary bi-axial stretching creates a micro-fibrous structure for excellent flexibility and sealing performance.

Strict QC System

ISO 9001:2015 certified. Rigorous testing on density, tensile strength, and compression set at every stage.

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Expert R&D Team

20+ years of sealing industry experience. We provide professional material selection and engineering support.

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Fast Delivery

Standard products shipped within 3 days. Custom orders delivered in 7–15 days with efficient production management.

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Global Approvals

FDA, UL, and DVGW approved. Meeting strict standards for food, gas, and semiconductor industries.

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Custom Solutions

Custom sizes, thicknesses, and shapes. One-stop service from design drawing to mold development.

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Eco-Friendly

Committed to sustainable sealing. All products comply with RoHS and REACH environmental regulations.

Certified Quality – Global Standards

Kaxite products meet the most rigorous international requirements

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ISO 9001:2015
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FDA 21 CFR 177.1550
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USP Class VI
UL Recognized
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RoHS / REACH
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DVGW (Gas)

Industries We Serve

Kaxite expanded PTFE products are trusted in demanding applications worldwide

🧪 Chemical Processing
💊 Pharmaceutical & Biotech
🍽️ Food & Beverage
🔬 Semiconductor
🛢️ Oil & Gas
✈️ Aerospace
💧 Water Treatment
⚡ Power Generation

Need a Customized Solution?

Get a free sample and tailored quote within 24 hours.

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20+
Years of Experience
40+
Countries Exported
24/7
Technical Support
0
MOQ – Samples Free

Frequently Asked Questions

Quick answers to the most common questions about our expanded PTFE products and services.

What is expanded PTFE (ePTFE) and how does it differ from standard PTFE? +

Expanded PTFE (ePTFE) is produced through a bi‑axial stretching process that creates a micro‑porous, fibrous structure. This gives it superior compressibility, conformability to irregular flanges, and better sealing performance compared to standard (skived or molded) PTFE sheets. Kaxite ePTFE products maintain the same excellent chemical resistance and wide temperature range (-200°C to +260°C) as conventional PTFE.

What certifications do your expanded PTFE products hold? +

Our ePTFE products are manufactured under ISO 9001:2015 quality management. They comply with FDA 21 CFR 177.1550 and USP Class VI for food/pharmaceutical contact, and are RoHS and REACH compliant. Gas-grade tapes meet DVGW standards. We also offer UL-recognized grades for electrical insulation applications.

What are the typical temperature and chemical resistance limits? +

Kaxite expanded PTFE products can operate continuously from -200°C to +260°C, with short-term peaks up to 300°C. They are chemically inert to virtually all media (pH 0–14), except molten alkali metals and elemental fluorine at high temperatures. This makes them ideal for aggressive chemicals, solvents, acids, and bases.

Do you offer custom sizes and shapes? +

Yes, we specialize in custom solutions. You can specify custom thickness (0.5–50 mm), sheet dimensions (up to 1500×1500 mm), tape widths/lengths, rod diameters, tube IDs/ODs, and gasket shapes. We also offer surface treatments: sodium etching (one or two sides), acrylic adhesive backing, and custom color options. Just provide your drawing or requirements, and our engineering team will assist.

What is the minimum order quantity (MOQ) and sample policy? +

We offer low MOQ for standard products – often as low as 1 roll of tape or 1 sheet. Free samples are available upon request (shipping cost may apply). For custom orders, MOQ depends on the complexity, but we always support trial orders to help you qualify our quality.

What is your typical lead time and shipping options? +

For standard stock items, we ship within 3–5 days. For bulk custom orders, lead time is typically 7–15 days after order confirmation. We ship worldwide via sea freight, air freight, DHL, UPS, or FedEx. Our factory is located in Ningbo, close to major ports (Ningbo and Shanghai) for efficient logistics.

Can I get technical support for installation or material selection? +

Absolutely. Our team of experienced engineers provides free technical consultation on product selection, flange design, torque specifications, and installation guidelines. We also have downloadable technical data sheets and installation manuals on our website. For urgent support, contact us via phone, email, or the live chat on our site.

Do you offer OEM / private label services? +

Yes, we welcome OEM projects. We can produce products with your own branding, packaging, and label design. We have experience working with distributors and industrial brands worldwide. Just provide your specifications and volume requirements, and we'll handle the rest.

Expanded PTFE Technical Specifications

Quick reference for material properties and performance data

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Temperature Range

-200°C to +260°C

Continuous service temperature, peak up to 300°C

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Chemical Resistance

pH 0 – 14

Inert to virtually all chemicals except molten alkali metals

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Available Sizes

0.5 – 50 mm

Sheet thickness, custom dimensions up to 1500×1500 mm

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Certifications

ISO 9001 · FDA · USP VI · RoHS · REACH

DVGW gas-grade and UL recognized options available

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Lead Time

3 – 15 Days

3–5 days for stock items, 7–15 days for custom orders

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Export Reach

40+ Countries

Global shipping via sea, air, DHL, UPS, FedEx

📄 Download Full Technical Data Sheet
  • about us

Ningbo Kaxite Sealing Materials Co., Ltd. is a professional manufacturer and supplier of premium expanded PTFE products, headquartered in Ningbo, Zhejiang Province – one of China's most dynamic industrial and export hubs. With over 20 years of dedicated experience in the sealing industry, Kaxite has grown into a trusted partner for industrial clients across more than 40 countries worldwide.

Our core expertise lies in the research, development, and production of high-performance expanded PTFE materials – including sheets, tapes, gaskets, rods, and tubes. Through proprietary bi-axial stretching technology, we convert virgin PTFE resin into a micro-porous, fibrous structure that delivers superior sealing performance, chemical resistance, and conformability to irregular flange surfaces. Our products are widely used in chemical processing, pharmaceutical, food & beverage, semiconductor, oil & gas, and aerospace industries.

Kaxite operates under a strict ISO 9001:2015 quality management system. Our products comply with international standards including FDA 21 CFR 177.1550, USP Class VI, RoHS, REACH, and DVGW for gas applications. We are committed to delivering consistent quality, on-time delivery, and responsive technical support – from material selection and custom design to after-sales service.

With an experienced R&D team, flexible production capabilities, and a customer-first mindset, Kaxite is dedicated to providing tailored sealing solutions that create lasting value for our partners. We welcome inquiries for standard products, custom orders, and OEM projects – and we offer free samples to help you qualify our quality before you commit.