Sumitomo Electric Industries Co., Ltd. and Japan's Sumitomo Electric Fine Polymer (Headquarters: Kumamotocho, Osaka, Japan) have developed a "high-performance fluorine film" for fluororesin coating technology that improves the wear resistance and slidability of metals. As a coating technology using a resin, "the highest level of wear resistance and slidability" (Sumitomo Electric). Samples will be available in the near future. The fluororesin used in the newly developed coating technology is polytetrafluoroethylene (PTFE) which completely replaces hydrogen in polyethylene (PE) with fluorine. When a PTFE film is coated on a substrate such as an aluminum alloy and directly irradiated with an electron beam, the bonding property between the substrate and PTFE is improved, and the carbon atoms of the PTFE are also crosslinked, so that the PTFE is not easily peeled off from the substrate. . PTFE is originally a substance with excellent slidability, so the coating can have high wear resistance and slidability at the same time. Previously, the bonding property between the substrate and PTFE was insufficient, and PTFE itself mainly relied on weak molecular force bonding between fluorine atoms, so that there was a problem of poor abrasion resistance. Sumitomo Electric conducted wear test on sheet samples using this coating technology, with general sliding material polyoxymethylene (POM), ultra-high polymer PE, super engineering plastics polyphenylene sulfide (PPS) and polyether ether with excellent mechanical properties. Compared with ketone (PEEK), etc., it exhibits very high abrasion resistance. According to Sumitomo Electric, the new coating technology is suitable for substrates such as aluminum alloy, steel (including stainless steel), copper and heat-resistant resin. Among them, aluminum alloy is suitable for applications with high joint force. When steel and copper are used, it is necessary to take preventive measures. Rust measures. Plates using the new coating technology can be formed into a complex shape by stamping, etc. The specific application is a wound bearing, which is suitable for sliding between the surface of the target material, and is not suitable for sliding with a sharp object. Jiangmen Dilin Lighting High-Tech Co., Ltd. , https://www.dilinlight.com
Sheet moldings (wound bearings) made with new coating technology
Schematic diagram of improving wear resistance by electron beam irradiation
Problems when electron beam irradiation is not performed
Evaluation of wear resistance by thrust wear test
Comparison of sheet samples after thrust abrasion test