The invention discloses application of fatty acid modified hyperbranched polyester to plastic processing, belonging to the technical field of plastic processing aids. The application of fatty acid modified hyperbranched polyester comprises the steps of adding 0.5-3% of fatty acid modified hyperbranched polyester into plastics, uniformly mixing, extruding for granulating, and drying to obtain a modified plastic product. Plastics including polypropylene and the like are modified through mixing the plastics including polypropylene and the like and hyperbranched polyester at a high speed, and then, granulating by extruding through a double-screw extruder; the hyperbranched polyester is added into plastic matrixes, so that the processing temperature of the plastics can be remarkably lowered, the apparent property of the plastics is improved, and relatively high melting flowability is realized through relatively low additive amount; the decomposition temperature of the fatty acid modified hyperbranched polyester is relatively high and can be up to 290 DEG C; and the melt index of the modified plastics is remarkably increased, and meanwhile the dispersing performance of a filling system is improved.
The invention discloses a wear-resistant, noise-reducing and thin-walled polypropylenecomposite material and a preparation method thereof. The wear-resistant, noise-reducing and thin-walled polypropylenecomposite material comprises the following raw materials in parts by weight: 59-79 parts of polypropylene; 8 to 16 parts of talcum powder; 6-10 parts of an elastomer; 4 to 12 parts of a functional master batch; 0-1 part of an antioxidant and 0-3 parts of other auxiliary agents; the ultrahigh molecular weightpolyethylene in the functional master batch has unique self-lubricating, wear-resisting and impact-resisting properties, so that the wear-resisting, impact-resisting and other mechanical properties of the thin-walled polypropylene composite material are remarkably improved by adding the ultrahigh molecular weightpolyethylene; the functional master batch takes high-fluidity polypropylene as a carrier; when the polymersystem is extruded from a twin-screw extruder or an injection molding machine, nano silicate can be well and uniformly dispersed into a composite material system, a unique chain layer structure of the nano silicate plays a role in dissipating sound transmission,and meanwhile, the nano silicate and ultra-high molecular weight polyethylene in the functional master batch generate a synergistic effect to ensure that the prepared composite material has excellentsound absorption and noise reduction functions.
The invention discloses a conductive thermoplasticpowder which comprises the following components counted in weight portions: 20 to 25 portions of conductive master batch, 10 to 15 portions of grafting sticky master batch and 47 to 74 portions of accessory ingredient. In the invention, specific conductive carbon black and polyethylenepowder are uniformly mixed by a high mixer and are pelletized by a double screw extruder for standby; the prepared grain material and other compounds are pelletized by the double screw extruder and ground into powder; and the prepared conductive thermoplastic powder improves the MFR of a composite, has better flatting performance, can reduce the processingenergy consumption and has an excellent adhesive attraction under the situation of ensuring high sticking intensity. The conductive thermoplastic powder can be used for coating the surface of metal pipes, combines the advantages of plastic with metalpipe organically, can be applied to the underground environment of coal ores, prolongs the service life of the pipes and simultaneously does not reduce the intensity of the pipes and reduces the investment on the coal ore enterprises.
The invention discloses a conductive foamed polypropylene material and a preparation method thereof. The conductive foamed polypropylene material is prepared from a conductive foamed polypropylene prefabricated material and a foaming agent, the adding amount of the foaming agent accounts for 2-5% of the weight of the conductive foamed polypropylene material, and the conductive foamed polypropyleneprefabricated material is prepared from the following components in parts by weight: 54 to 86.8 parts of polypropylene, 8 to 15 parts of conductive carbon black, 0 to 10 parts of a toughening agent,5 to 20 parts of a filler, 0.1 to 0.5 part of an antioxidant and 0.1 to 0.5 part of a processing aid. According to the invention, a micro-foaming process is applied to a conductive modified polypropylene material, conductive carbon black is added to form a cross-linked network structure, and based on the formation of foam holes in the material, the conductive carbon black dispersed in a base material is gathered in the base body intensively in volume, so that the effective and compact conductive path is formed in the material so as to reduce the use amount of the conductive additive of the material, effectively and significantly reduce the surface resistance of the material, improve the conductive effect of the material and reduce the cost of the material; and the preparation process is simple, and the prepared polypropylene material is excellent in performance.
The invention relates to the technical field of wrapping films, and discloses a metallocene linear low-density polyethylene reinforced wrapping film manufacturing process. The process is characterizedin that mLLDPE-a and mLLDPE-b in a wrapping film structure are two metallocene linear low-density polyethylene with different melt indexes respectively, are used for improving the strength, and are used for adjusting melt index of blended material according to different equipment characteristics; an mLLDPE-c is metallocenelinear low density polyethylene with a high viscosity mark and is used forimproving the viscosity of a finished product film, polyethylene is thermoplastic resin prepared by polymerizing ethylene and also comprises a copolymer of ethylene and a small amount of alpha-olefinin industry, and the polyethylene is odorless, nontoxic and wax-like in hand feeling, has excellent low-temperature resistance (the lowest use temperature can reach minus 100 DEG C to minus 70 DEG C)and good chemical stability, can resisterosion of most acids and alkalis (does not resist acids with oxidizing properties), is insolubility in common solvents at normal temperature, and has low water absorption and excellent electrical insulation, and the layer A is the mLLDPE-a + mLLDPE-b + LLDPE; the B layer is mLLDPE-a + mLLDPE-b + LLDPE, the C layer is mLLDPE-a + mLLDPE-b + LLDPE, the D layer is mLLDPE-a + mLLDPE-b + LLDPE, and the E layer is mLLDPE-c.