Silver-plated polytetrafluoroethylene microporous film and preparation method thereof
A polytetrafluoroethylene, microporous film technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve the problem of unsatisfactory bonding performance between chemical plating and polytetrafluoroethylene. Corresponding to the problems of insufficient performance and unsatisfactory bonding performance, it can optimize the bonding performance of the coating, eliminate internal stress, and improve the bonding force.
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Embodiment 1
[0055] Stir and mix polytetrafluoroethylene dispersed resin powder and petroleum ether at a mass ratio of 1:0.2, and let stand at 60°C for 20 hours to form a polytetrafluoroethylene paste mixture. The polytetrafluoroethylene mixture was pre-extruded through a flat T-shaped die at 50°C and pushed into a cuboid strip-shaped thick sheet, then rolled at 65°C by a calender, and removed at 200°C. ester, and post-heating pretreatment for 1 hour to obtain a polytetrafluoroethylene-based tape. The above-mentioned polytetrafluoroethylene base tape was stretched longitudinally at 260°C; and then the stretched film was stretched transversely at 180°C on a tenter. The biaxially stretched polytetrafluoroethylene film was fixed with a film frame, and sintered at 250° C. for 1 hour, and the obtained product was product A. The polytetrafluoroethylene microporous film obtained after low-temperature sintering was placed in a 350g / L sodium hydroxide solution for ultrasonic cleaning, washed with ...
Embodiment 2
[0057] Stir and mix polytetrafluoroethylene dispersed resin powder and petroleum ether at a mass ratio of 1:0.2, and let stand at 40°C for 24 hours to form a polytetrafluoroethylene paste mixture. The polytetrafluoroethylene mixture was pre-extruded through a flat T-shaped die at 50°C and pushed into a rectangular parallelepiped thick sheet, then rolled at 50°C by a calender, and removed at 180°C. ester, and post-heating pretreatment for 1 hour to obtain a polytetrafluoroethylene-based tape. The above-mentioned polytetrafluoroethylene base tape was stretched longitudinally at 220°C; and then the stretched film was stretched transversely at 150°C on a tenter. The biaxially stretched polytetrafluoroethylene film was fixed with a film frame, and sintered at 220° C. for 2 hours, and the obtained product was product A. The polytetrafluoroethylene microporous film obtained after low-temperature sintering was placed in a 350g / L sodium hydroxide solution for ultrasonic cleaning, wash...
Embodiment 3
[0059] Stir and mix polytetrafluoroethylene dispersed resin powder and petroleum ether at a mass ratio of 1:0.2, and let stand at 70°C for 12 hours to form a polytetrafluoroethylene paste mixture. The polytetrafluoroethylene mixture was pre-extruded through a flat T-shaped die at 70°C and pushed into a cuboid strip-shaped thick sheet, then rolled at 80°C by a calender, and removed at 220°C. ester, and post-heating pretreatment for 1 hour to obtain a polytetrafluoroethylene-based tape. The above-mentioned polytetrafluoroethylene base tape was stretched longitudinally at 300°C; and then the stretched film was stretched transversely at 200°C on a tenter. The biaxially stretched polytetrafluoroethylene film was fixed with a film frame, and sintered at 260° C. for 1 hour, and the obtained product was product A. The polytetrafluoroethylene microporous film obtained after low-temperature sintering was placed in a 350g / L sodium hydroxide solution for ultrasonic cleaning, washed with ...
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