706results about How to "Improve melt fluidity" patented technology

The thermoplastic resin composition of the present invention is obtained by graft polymerizing a monomer that composes a polymer that is compatible with or has affinity for polycarbonate resin in the presence of a polymer that is incompatible with polycarbonate resin; wherein, the weight average molecular weight of a soluble component that dissolves in chloroform is 10,000 to 100,000. In the case of using this thermoplastic resin composition in an engineering plastic, fluidity can be improved without impairing the characteristics of the engineering plastic. The engineering plastic composition of the present invention is preferably used in the field of housings and various parts of OA equipment, telecommunications equipment and home appliances such as photocopiers, facsimiles, televisions, radios, tape recorders, video decks, personal computers, printers, telephones, information terminals, refrigerators and microwave ovens, as well as in other fields such as automotive parts.

The invention relates to apparatus for positioning and cooling melting lining layer when the melting lining layer flows out of the reactor shell during accident. The improvements of invention are described as following: the design of the cooling lining layer trap which has steel basket shell and arranged in sub-reactor, wherein sacrifice material is filled in the steel basket for diluting the component containing uranium and steel component of the lining layer; the shape (arrangement) of the sacrifice material in reactor core; the choice for optimum number of the sacrifice material; installation of guiding device used for the lining layer flowing into the reactor core trap. Especially, the thickness of bottom of the cooling jacket is larger than the thickness of the side wall thereof for no less than 30%, and the cooling jacket inclines to its center for 10 to 20 degree; the diluent and sacrifice material is made into blocks packed in steel shell.

A heat-resistant aluminum alloy material with high strength and preparation method thereof are provided. The aluminum alloy material comprises (by weight %): Cu: 1.0˜10.0, Mn: 0.05˜1.5, Cd: 0.01˜0.5, Ti: 0.01˜0.5%, B: 0.01˜0.2 or C: 0.0001˜0.15, Zr: 0.01˜1.0, R: 0.001˜3 or (R₁+R₂): 0.001˜3, RE: 0.05˜5, and balance Al:, wherein, R, R₁, and R₂ include Be, Co, Cr, Li, Mo, Nb, Ni, W. The Al alloy has the advantages of narrow quasi-solid phases temperature range of alloys, low hot cracking liability during casting improved high temperature strength and high heat resistance.

The present invention provides a composition comprising a liquid crystalline polyester, a plate-like filler and a carbon black having a number average particle size of more than 20 nm and 45 nm or less. The composition is less likely to cause blister even at a high temperature.

The invention relates to a kind of scraping tolerance type special material for ornament in motor and preparation method, comprising(by weight parts): polypropylene 80-90 parts, superfine talcum powder 10-20 parts, lubricant 0.5-3.0 parts, antioxidant1010 1.0-2.0 parts. The method comprises: 1) stirring and mixing the polypropylene and lubricant, antioxidant at rotate speed of 300-500 rpm for 3-5 minutes; 2) adding superfine talcum powder and stirring and mixing at rotate speed of 300-500 rpm for 5-10 minutes; 3) stirring and mixing at rotate speed of 1500-2000 rpm for 10-15 minutes; 4) stirring and mixing at rotate speed of 300-500 rpm for 5-10 minutes to obtain premix material; 5) extruding the premix material by extruder to pelletizen finally the finished product being obtained. The invention has features: low odor emission, low cost, high surfaceness, better impact resistance, intension and toughness and good melt flowing, widely used in production of ornament in motor.

The invention relates to a powerful three-dimensional crimp memory fiber and a production method thereof. Raw materials employed include Poly(1,4-cyclohexylene dimethylene terephthalate) (PCT for short) and poly(trimethylene terephthalate) (PTT for short); and the raw materials are melted, mixed and subjected to blend spinning. According to the invention, a blend melt which is formed by melting and blending the polymers and even and stable in dispersion is subjected to spinning, drafting and the like, so that three-dimensional short fibers with very excellent crimp and memory properties can be obtained. On one hand, the PCT has very good crimp and compression reversion properties, and more easily form lots of dense crimps under the synergistic effect of the high elasticity performance of the PTT, and the PTT has extremely good memory performance and is capable of locking the crimps formed; and as a result, the powerful three-dimensional crimp memory fibers are capable of always keeping the oringinal crimp state.

The invention discloses the polyurethane hot melt adhesive for high-grade lining cloth, which is obtained through the reaction among polyester polyols with the relative molecular weight thereof being 2,000 to 2,200, 4,4-diphenylmethane diisocyanate (MDI), toluene diisocyanate (TDI), 1,4-butanediol (1,4-BDO) and aromatic diamine extender, wherein, the molecular weight of the polyurethane hot melt adhesive is 85,000 to 95,000. The polyurethane hot melt adhesive has the advantages of low thermal-bonding temperature and rapid crystallization, thereby facilitating the machining operations, preventing the polyurethane hot melt adhesive from being stuck to cloth and further preventing the polyurethane hot melt adhesive from penetrating and bleeding on ultra-thin loose base cloth; furthermore, the polyurethane hot melt adhesive has outstanding resistance to dry-cleaning and washing as well as washing under various caustic conditions. The invention further discloses a method for preparing the polyurethane hot melt adhesive for high-grade lining cloth.

The invention discloses a halogen-free flame-retardant glassfiber reinforced polycarbonate/polybutylene terephthalate (PC/PBT) alloy material and a preparation method thereof. The halogen-free flame-retardant glassfiber reinforced PC/PBT alloy material consists of the following components in percentage by weight: 53 to 66.6 percent of PC resin, 10 to 20 percent of PBT resin, 1 to 2 percent of compatilizer, 3 to 5 percent of toughening agent, 1 to 5 percent of halogen-free flame retardant, 10 to 20 percent of glass fiber, 0.3 to 0.8 percent of coupling agent, 0.6 to 1 percent of lubricant and 0.2 to 0.5 percent of antioxidant. The halogen-free flame-retardant glassfiber reinforced PC/PBT alloy material of the invention has the advantages of high melt fluidity, bright and clean surface of product, and good comprehensive performance and can be used for manufacturing liquid crystal inner frames, television modules and some external products having high surface requirements.

The invention discloses polyimide resin with low melt viscosity and high toughness as well as a preparation method of a composite material of the polyimide resin. The resin is high in solid content, low in solution viscosity and is easy to steep carbon fibers to prepare a high-quality carbon fiber prepreg (a belt or cloth); a melt resin formed by heating and melting the resin has the characteristics of low melt viscosity and wide melting temperature; a resin condensate formed by heating and solidifying is high in toughness and high in Tg (glass-transition temperature). The resin is suitable for steeping reinforced fibers to prepare prepregs, and a carbon fiber reinforced composite material prepared by the autoclave and the hot hubbing forming process is excellent in impact-resistant toughness, comprehensive mechanical property and high-temperature resistant performance.

The invention discloses a polyactic acid/polycarbonate alloy material, and a preparation method and application thereof. The polyactic acid/polycarbonate alloy material comprises the following raw materials in part by weight: 10 to 90 parts of polycarbonate, 10 to 90 parts of polyactic acid, 1 to 20 parts of liquid crystal high polymer and 1 to 25 parts of flexibilizer. The polyactic acid/polycarbonate alloy material is prepared by adding the raw materials into a double-screw extruder to be melted and blended. The polyactic acid/polycarbonate alloy material provided by the invention has environmentally-friendly characteristics and excellent physical and mechanical properties, and greatly improves impact strength, bending modulus and heat distortion temperature. The liquid crystal high polymer is added to promote the quick crystallization of the polyactic acid, so that the prepared polyactic acid/polycarbonate alloy can be formed quickly, the forming cycle is reduced from 80 seconds to50 seconds, processing cost is reduced, flowability and fire resistance are improved, and the polyactic acid/polycarbonate alloy material is applicable in the fields of office automation (OA) equipment, communication equipment, automobile parts, domestic appliances and the like.

The invention relates to a recycled material for preparing vehicle bumper and a preparation method of the recycled material. The recycled material is prepared from recycled polypropylene, recycled polyethylene, an elastomer, an inorganic mineral filter, kieselguhr, a compatilizer, an antioxidant and a lubricant. The preparation method of the recycled material provided by the invention is reasonable, simple in technology, safe and environment-friendly, can obviously improve the strength, the rigidity, the flexibility and the size stability of the recycled plastic, and simultaneously, can greatly eliminate the pungent smell caused by degrading and the like of the recycled plastic; and moreover, in comparison with new materials, the recycled material can reduce the cost under the condition of low performance loss, and can be used for low- and mid-range vehicle bumpers.

The invention relates to a functional nylon-6 fiber and a preparation method thereof. The fiber comprises branched-chain nylon-6 functional master batches and conventional nylon-6 chips, wherein the branched-chain nylon-6 functional master batches account for 6-10% in weight percentage; the preparation method comprises the steps of firstly, preparing the branched-chain nylon-6 functional master batches with an in-situ polymerization method or a blending method; secondly, crystallizing and drying the branched-chain nylon-6 functional master batches and the conventional nylon-6 chips respectively, and mixing, and then performing vacuum drying to obtain blended chips; and finally, performing melt spinning to the blended chips. The using amount of functional additives is reduced properly under a condition that the functionality is improved or kept, the production cost is reduced and the fiber spinnability is improved.