China Impregnated Products

After APGD and DBD treatment, the surface microscopic appearance and surface chemical composition have changed, and the treatment effect of APGD is better than that of DBD. The application is subject to certain restrictions. Radiation grafting treatment method must have radiation energy. The results showed that the CF bond on the PTFE surface was broken during the pre-illumination stage, producing active centers; in the grafting reaction stage, the CF bond on the PTFE surface continued to be irradiated by ultraviolet light to break, and the fluorine atoms fell off, thereby grafting acrylic monomers. Especially for filled PTFE, the tensile strength is reduced by 45%.

After a more uniform treatment of the PTFE surface with APGD for 40 seconds, the mass fraction of oxygen on the PTFE surface increased from 0 to 21%, and the water contact angle on the surface decreased from 118 degrees to 53 degrees. conducted X-ray photoelectron spectroscopy studies on the surface modified PTFE film grafted with ultraviolet light. The tensile strength is reduced by 30%, and the elongation is also reduced. Radiation causes the monomer to undergo chemical graft polymerization on the surface of PTFE, so that a layer of grafted polymer that is easy to bond is formed on the surface of the PTFE membrane.

The surface roughness increases with the increase of the grafting amount, but the surface does not change color, and the surface resistance does not change in a humid environment. The biggest weakness is that the PTFE itself is damaged while being grafted by radiation. The grafted PTFE grows uniformly in three dimensions and maintains its shape, but loses the luster and lubricity of the original PTFE., with Co60. Wei Yabing et al..This method is to place PTFE in polymerizable monomers such as styrene, fumaric acid, methacrylate, etc. body. Fang Zhi and others studied the effect of APGD (glow discharge under atmospheric pressure) and DBD (dielectric barrier discharge) on the surface of PTFE in the air, and analyzed the reasons for the different treatment effects PTFE Fusing Belts Factory of APGD and DBD