2results 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 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.