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Kaxite Seals produces expanded PTFE sheet from 100% virgin PTFE resin through a biaxial orientation process. The result is a white, soft, self-lubricating sheet with a micro-network structure that resists cold flow and creep relaxation — the two failure modes that cause most flange leaks in service.
If your gasket workshop needs a stable base material that cuts cleanly, seals damaged or irregular flanges, and keeps its sealing load over years of thermal cycling, this grade is built for that job. It works from −268 °C to +280 °C, has a tensile strength of ≥10 MPa (ASTM F-152), and complies with FDA 21 CFR 177.1550 for food and pharmaceutical contact.
Standard sheet size is 1500 × 1500 mm, thickness from 0.5 mm to 6 mm, with maximum size up to 2000 × 2000 mm on request. Custom sizes, OEM private-label packaging and flexible MOQ are available for B2B buyers.
Order straight from our Ningbo production line — no trading company markup, no hidden layer between your purchase order and the price you pay per sheet.
The expanded PTFE network resists cold flow and creep relaxation far better than standard moulded PTFE, so cut gaskets keep their sealing load under alternating temperature and pressure.
The soft, compressible sheet flows into surface irregularities at low bolt load — ideal for fragile glass-ceramic flanges and for re-sealing pitted or warped sealing faces.
Density, tensile strength, compressive strength, compression, recovery, creep relaxation and nitrogen seal rate are checked on every production run.
Standard 1500 × 1500 mm and 0.5–6 mm thickness, with maximum size up to 2000 × 2000 mm and non-standard thicknesses produced to your drawing.
Neutral cartons, private-brand labels, custom pallet marking and full export documentation for distributors and gasket workshops.
Expanded PTFE sheet is supplied in the standard thicknesses below, each available in both metric and imperial specifications. Sheet size is 1500 × 1500 mm as standard; maximum size up to 2000 × 2000 mm is produced on request.
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| Thickness (mm) | Thickness (inch) | Standard Sheet Size (mm) | Standard Sheet Size (inch) | Model Code |
|---|---|---|---|---|
| 0.5 | 1/64" | 1500 × 1500 | 60" × 60" | 4030 |
| 1.0 | 1/32" | 1500 × 1500 | 60" × 60" | 4030 |
| 1.5 | 1/16" | 1500 × 1500 | 60" × 60" | 4030 |
| 2.0 | 5/64" | 1500 × 1500 | 60" × 60" | 4030 |
| 3.0 | 1/8" | 1500 × 1500 | 60" × 60" | 4030 |
| 4.0 | 5/32" | 1500 × 1500 | 60" × 60" | 4030 |
| 5.0 | 3/16" | 1500 × 1500 | 60" × 60" | 4030 |
| 6.0 | 1/4" | 1500 × 1500 | 60" × 60" | 4030 |
Maximum sheet size 2000 × 2000 mm. Non-standard sizes and thicknesses are produced to your drawing — send the specification with your enquiry.
Swipe horizontally to see the full property table →
| Property | Value | Test Standard |
|---|---|---|
| Material | 100% virgin biaxially oriented PTFE | — |
| Colour | White | — |
| Working temperature | −268 °C to +280 °C (melting point 327 °C) | — |
| Density | 0.8–0.9 g/cm³ | GB/T 22308 · ASTM D 4895 |
| Tensile strength | ≥10 MPa | ASTM F-152 |
| Compressive strength | ≤140 MPa | GB/T 20671.2 |
| Compression (35 MPa load, T=3 mm) | 59.55% | GB/T 20671.2 · F-36 |
| Recovery (35 MPa load, T=3 mm) | 11.61% | GB/T 20671.2 · F-36 |
| Creep relaxation (100 °C × 22 h, T=3 mm) | 68.32% | GB/T 20671.5 · F-38 |
| Nitrogen seal (17.25 MPa) | 0.16 ml/hr (internal pressure 4 MPa) | JB/T 10688 · DIN 3535-4 |
| Nitrogen seal (35 MPa) | 0.0037 ml/hr (internal pressure 4 MPa) | JB/T 10688 · DIN 3535-4 |
| Certification | FDA 21 CFR 177.1550 | — |
| Structure | Biaxially oriented micro-network | — |
| Surface property | Self-lubricating, low coefficient of friction | — |
Cut-to-size gaskets for chemical plants, petrochemical plants, refineries and power station flanges.
The soft network conforms to pitted, warped and out-of-spec sealing faces without re-machining.
Low bolt preload requirement means fragile flanges are not cracked or distorted during tightening.
Pipe flanges, reactors, tanks, heat exchangers and pumps handling aggressive acids, solvents and steam.
FDA 21 CFR 177.1550 compliant, dust-free production, no contamination of the process medium.
Enamel lining, glass lining, plastic lining, rubber lining, graphite lining and titanium steel towers.
Send your sheet size, thickness, quantity and destination port. Our sales engineers reply with a quotation, available samples and the packing options for your market.
Address
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
