Kaxite Modified PTFE (TFM) gaskets are made from second-generation PTFE — tetrafluoroethylene copolymerized with a small amount of PPVE comonomer. The denser, less crystalline structure reduces cold flow by 3-5×, cuts permeation by 30-50%, and makes the material heat-weldable. The same pH 0-14 chemical inertness, a fraction of the re-torque maintenance.
Manufactured in Ningbo, China by Kaxite Sealing, our Modified PTFE gaskets are supplied as sheets (60″×60″, 70″×70″), die-cut rings and full-face gaskets in thicknesses 1-10 mm, cut to ASME B16.5, EN 1092-1, DIN, JIS and GB flange standards. OEM/ODM, bulk wholesale and free samples for qualified buyers.
Standard PTFE is a linear, highly crystalline polymer. Modified PTFE inserts ~0.1% perfluoropropyl vinyl ether (PPVE) side chains, disrupting the crystal lattice and producing a denser, more amorphous structure.
The denser structure resists the slow deformation that causes standard PTFE gaskets to relax, leak and require re-torquing. Real-world service life extends 3-5× without retightening.
Volatile media permeate through standard PTFE gaskets over time. Modified PTFE's denser structure reduces through-gasket diffusion by 30-50%, lowering fugitive emissions on chemical and refinery flanges.
Modified PTFE can be heat-welded into large continuous gaskets or vessel linings. Standard PTFE cannot be reliably welded, which limits it to smaller or single-piece gaskets. This expands design freedom on large equipment.
Acid, halogen, solvent and oxidizer flanges where cold flow would otherwise cause leaks and re-torque downtime.
Flanges with volatile organic compound (VOC) service where low permeation supports fugitive-emission compliance.
CIP/SIP circuits and sterile process equipment requiring FDA-compliant, non-leaching sealing with long service intervals.
Ultra-clean fluid and gas transfer where low permeation and non-contaminating surfaces are essential.
Vessel linings, tower flanges and other large-diameter joints that require heat-welded PTFE sheets.
Dairy, brewing and edible-oil lines where FDA-compliant, odourless, taste-neutral contact surfaces are required.
Send flange standard, size, thickness and operating conditions — our engineers reply with pricing, lead time and sample availability within 24 hours.
Related products: Pure PTFE Gaskets Expanded PTFE Gaskets PTFE Envelope Gaskets PTFE Ring Gaskets PTFE Sheets
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