A method of bonding an age-resistant polytetrafluoroethylene-rubber
By forming an activation layer on the surface of polytetrafluoroethylene (PTFE) and reacting it with the adhesive to form chemical bonds such as urethane groups and amide groups, the problems of low bonding strength and poor aging resistance between PTFE and rubber are solved, achieving a bonding effect with high strength and aging resistance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANDONG NON METALLIC MATERIAL RESEARCH INSTITUTE
- Filing Date
- 2026-06-08
- Publication Date
- 2026-07-17
AI Technical Summary
The bonding strength between polytetrafluoroethylene and rubber is low and the aging resistance is poor. Existing methods cannot meet the requirements for bonding strength and aging resistance.
An activation layer is formed on the surface of polytetrafluoroethylene (PTFE) treated with sodium naphthalene by mixing toluene-2,4-diisocyanate (TDI) and epoxy resin E51. The PTFE is then bonded to the rubber by hot pressing with an adhesive. The isocyanate groups in TDI react with the active groups on the PTFE surface to form chemical bonds such as urethane groups and amide groups.
It significantly improves the bonding strength between PTFE and rubber, and maintains high bonding strength after long-term aging, thus enhancing the aging resistance of the bonding interface.
Smart Images
Figure CN122405162A_ABST