3results about How to "Avoid aging damage" patented technology

This invention discloses a glass fiber reinforced polypropylene composite material, comprising the following components by weight: 49-101 parts polypropylene resin; 1-8 parts hyperbranched polyethylene; 10-120 parts long glass fibers; and 0.5-6 parts compatibilizer. The number of branching points in the polymer with a number average molecular weight of 3.0 < LogM < 4.0 is greater than 295 SCB / 1000TC; the number of branching points in the polymer with a number average molecular weight of 4.0 ≤ LogM < 4.5 is greater than 290 SCB / 1000TC; and the number of branching points in the polymer with a number average molecular weight of LogM > 6.0 is less than 300 SCB / 1000TC. This invention, through specific polypropylene resin and hyperbranched polyethylene, achieves a specific distribution of branching points in the polymer of the composite material, solving the problem of electrochemical corrosion of the metal structure in injection-molded products with long glass fiber reinforced metal inserts, thereby improving the problem of corrosion caused by moisture and rainwater in outdoor injection-molded products with metal inserts.

The utility model discloses a kind of anticorrosion oil cups of pressure sensor, including cup body, the cup body whole is made of polytetrafluoroethylene material, the bottom of the cup body is provided with protruding part, and located the top of the cup body is provided with oil storage groove, to realize the storage of internal silicone oil, the inner wall circumferential direction of the oil storage groove is equidistantly arranged with multiple ribs, to divide the silicone oil flow space in oil storage groove, inhibit vortex generation, the bottom of the cup body is close to the edge and is provided with sealing structure, to ensure the extrusion sealing between cup body and pressure sensor shell.The utility model is made of polytetrafluoroethylene material cup body, combined with the sealing ring of fluorine rubber material, significantly improve the anticorrosive performance of oil cup whole, can effectively resist the erosion of various corrosive media, avoid cup body aging breakage and medium leakage, prolong the service life of pressure sensor.

The utility model belongs to the air leakage detection technical field, concretely speaking is a kind of SCR air leakage detection device, including air leakage detector;The top of air leakage detector is equipped with display screen, one side is fixedly installed with connector, the side that connector is away from air leakage detector is provided with gas delivery mechanism, the side that gas delivery mechanism is away from connector is provided with filter mechanism;The side close to gas delivery small pipe is provided with jacking mechanism and leakage prevention component;The cooperation of screw hole, screw cylinder, gas delivery pipe, fixed cylinder, gas delivery small pipe and filter screen can make gas delivery pipe be easily disassembled by the setting of screw hole, screw cylinder and gas delivery pipe, so as to save space more when storing, and also can be directly disassembled and maintained when maintaining, more portable and efficient, the cooperation of fixed cylinder, gas delivery small pipe and filter screen can filter the air passing through, to prevent impurities from entering the inside of machine and causing damage.