40results about How to "Lower injection temperature" patented technology

The invention discloses an environmentally-friendly, high fire-resistant and high seawater-resistant polypropylene and belongs to the technical field of high polymer materials. The environmentally-friendly, high fire-resistant and high seawater-resistant polypropylene is characterized by comprising copolypropylene and/or homopolypropylene, one or more fire retardants, one or more ultraviolet absorbers, one or more light stabilizers, one or more antioxidants, one or more copper toxicity-resistant agents and one or more processing auxiliary agents according to a certain weight part ratio. The environmentally-friendly, high fire-resistant and high seawater-resistant polypropylene has excellent mechanical properties and effects of high fire resistance and high seawater resistance.

The invention provides a production technology of a modified injection-molding zipper. The production technology comprises steps as follows: A), copolyoxymethylene, polyurethane elastomers, a compatibilizer and auxiliaries are mixed, and a mixed material is obtained, wherein the polyurethane elastomers account for 3wt%-8wt% of copolyoxymethylene; B), after granulating extrusion, the mixed material is subjected to injection molding, modified injection-molding particles are obtained, and the temperature of the injection molding is 180-220 DEG C; C), the modified injection-molding particles are subjected to color matching, injection molding of zipper teeth is performed, the modified injection-molding zipper is obtained, and the temperature of the injection molding of the zipper teeth is 180-220 DEG C. The modified injection-molding zipper has higher hardness, better wear resistance, higher corrosion resistance and better impact resistance, and furthermore, single-tooth strength and single-tooth displacement strength of the zipper are higher, so that the problem that the zipper teeth are prone to embrittlement and falling in a use process is solved; besides, the temperature of the injection molding is lower, therefore, the phenomenon of high-temperature oxidation discoloration of toner in a molding process is eliminated, and energy consumption is low.

The invention discloses a low-cost low-odor degradable natural-fiber-reinforced polycarbonate reclaimed material capable of achieving light weight and a preparation method thereof. The reclaimed material is prepared from the following raw materials in percentage by weight: 34-99 wt% of a polycarbonate reclaimed material, 1-50 wt% of natural fibers, 0.1-5 wt% of foaming agent masterbatch, and 0.01-1 wt% of an antioxidant. The polycarbonate reclaimed material, the antioxidant and the like are added from a main feeding port of a double-screw extruder, and the natural fibers and the foaming agentmasterbatch are added from a melting section in the middle of a screw to obtain the natural-fiber-reinforced polycarbonate reclaimed material. The natural-fiber-reinforced polycarbonate composite material is prepared into a low-cost, low-odor and degradable natural-fiber-reinforced polycarbonate product under a secondary mold opening condition or an under-injection condition by adopting an injection molding method. The disclosed material is endowed with the characteristics of low density, low odor, high performance and degradability while the problem of resource waste is solved, and a new wayis provided for lightweight and environment-friendly development of automobiles.

The invention relates to the technical field of polymer materials, in particular to a carbon fiber reinforced polycarbonate composite material used in IMR molding and its products. The composite material includes by weight parts: 100 parts of polycarbonate resin; 10-60 parts of carbon fiber; 5-30 parts of flame retardant; the flame retardant is two or more compound flame retardants . The product is a product produced by molding the carbon fiber reinforced polycarbonate composite material. The carbon fiber reinforced polycarbonate composite material and its products of the present invention can not only ensure the flame retardancy and fluidity of the composite material, but also reduce the injection molding temperature of the composite material, so that the composite material can be applied to IMR molding, and the application of IMR film In high-end ultra-thin products, it can also injection mold structural parts with beautiful appearance.

The invention provides a polylactic acid-polypropylene composite material, and a preparation method and application thereof. The polylactic acid-polypropylene composite material is prepared from the following components in parts by weight: 25 to 40 prats of polylactic acid, 60 to 70 parts of polypropylene and 5 to 10 parts of maleic anhydride. The polylactic acid-polypropylene composite material is low in injection molding temperature and has the advantages of environmental friendliness, environmental protection, low smell, stable size and the like.

The invention relates to the technical field of turbine engines, in particular to a hot end fuel and lubricating oil pipeline structure of a turbine engine, and aims to solve the problems that in theprior art, the heat efficiency of the engine cannot be better improved and a better cooling effect on a bearing cannot be achieved. The hot end fuel and lubricating oil pipeline structure comprises alubricating oil return cavity shell, a fuel oil preheating cavity shell, a fuel oil preheating cavity, a fuel oil inlet pipe, a lubricating oil return pipe and a lubricating oil inlet pipe, wherein the fuel oil inlet pipe, the lubricating oil return pipe and the lubricating oil inlet pipe are sequentially nested from outside to inside and are reserved with gaps among one another; one end of the fuel oil inlet pipe sequentially communicates with the fuel oil preheating cavity and a fuel oil supply pipe; one end of the lubricating oil return pipe communicates with the inside of the lubricating oil return cavity shell; and one end of the lubricating oil inlet pipe is positioned inside the lubricating oil return cavity shell and is opposite to the upper part of the bearing. According to the hot end fuel and lubricating oil pipeline structure, the fuel oil inlet pipe, the lubricating oil return pipe and the lubricating oil inlet pipe are sequentially nested from outside to inside, and the temperatures of the fluids in the three pipelines are sequentially reduced from outside to inside, so that the cooling effect on the bearing is improved and the heat efficiency of the engine is improved.

The present invention provides a degradable disposable oropharyngeal airway and a preparation method. The degradable disposable oropharyngeal airway is composed of a degradable polymer main ingredient of a degradable substrate and an enhancer. The injection molding process includes that: a feed inlet is of 145-165 DEG C, a compression section is of 155-170 DEG C, a metering section is of 160-175 DEG C, a nozzle is of 160-170 DEG C, the mold temperature is 15-30 DEG C, the injection pressure is 45-80 Mpa, the injection molding time is 41-45 seconds, the dwell time is 0 sec, and the screw speed is 180 rpm. The used degradable disposable oropharyngeal airway can completely degrade in the natural environment by landfill without burning to achieve low-carbon, energy-saving and environmental protective purposes.

The present invention provides a degradable disposable tongue depressor and a preparation method. The degradable disposable tongue depressor is prepared by a degradable polymer main ingredient of a degradable substrate and an enhancer. The injection molding process includes that: a feed inlet is of 150-160 DEG C, a compression section is of 155-165 DEG C, a metering section is of 155-170 DEG, a nozzle is of 155-175 DEG C, the mold temperature is 20-45 DEG C, the injection pressure is 50-100 MPa, the injection time is 38-44 seconds, the dwell time is 0 sec, and the screw speed is 180 rpm. The used degradable disposable tongue depressor can completely degrade in the natural environment by landfill without burning and environmental pollution to achieve low-carbon, energy-saving and environmental protective purposes.

The invention relates to a motor winding component and an injection molding motor with the winding component. The component is a winding component formed by two times of plastic coating, and the winding component comprises a winding part, a low-pressure injection molding part and a high-pressure injection molding part; and the low-pressure injection molding part firstly carries out plastic coating molding on the winding part to form a low-pressure injection molding pre-forming assembly, and the low-pressure injection molding pre-forming assembly is subjected to plastic coating molding through the high-pressure injection molding part. Compared with the prior art, the invention has the advantages of being suitable for complex working conditions, high in product percent of pass, high in finished product reliability and the like.