22 results about "Twin screw extruder" patented technology

A polypropene with ultra-high fusing index (400 g/min) is prepared from conventional polyacrylic resin (50-70%) and degradating mother particles (30-50%) through blending extruding conventional polypropene powder with organic peroxide in a screw extruder, cooling, granulating to obtain said degradating mother particles, mixing conventional polyacrylic resin with said mother particles, extruding, cooling, and granulating.

The invention relates to a high-strength and high-modulus polyvinyl alcohol fiber and a melt spinning method of the high-strength and high-modulus polyvinyl alcohol fiber. The method comprises the following steps that polyvinyl alcohol, water and polyatomic alcohol are subjected to full swelling after being uniformly mixed; the polyvinyl alcohol subjected to the full swelling is added into a double-screw-rod extruding machine and is then subjected to full fusion to be extruded, and melt fine flows form a primary fiber after air blowing cooling; and the prepared primary fiber is subjected to the drying by a hot air drying oven, multistage stretching and tense heat setting to form the polyvinyl alcohol fiber. The preparation method of the prepared polyvinyl alcohol fiber has the advantage that through the hydrogen bond compounding among water molecules, polyatomic alcohol and polyvinyl alcohol molecules, the melt spinning and the high-power stretching of the polyvinyl alcohol are realized. The polyvinyl alcohol fiber prepared by the preparation method has the advantages of fiber degree controllability, high strength and high modulus, and can be widely applied to the field of civil engineering concrete.

The invention discloses a resin composition and its preparing process, wherein the resin composition comprises alkali metal salt (A) whose content is 0.1-20 umol/g converted into alkali metal, carboxylic acid and its salt whose content is 2 umol/g converted into carboxylic acid radicals, vinyl with 5-60 mol% of content and 80-90 mol% of saponification degree.

The invention discloses a flame-retardant polybutylene terephthalate (PBT) composite material, which is prepared by taking a mixture of montmorillonite and polytetrafluoroethylene as an organic synergistic flame retardant and cooperating with a nitrogen containing flame retardant, and a preparation method thereof. The composite material comprises the following components in percentage by weight: 45-70 percent of polybutylene terephthalate, 1-10 percent of nano-sized organic montmorillonite and 10-30 percent of glass fiber which is subjected to surface treatment, and 10-30 percent of nitrogen containing flame retardant, wherein the nano-sized organic montmorillonite is montmorillonite mineral powder processed by an alkyl intercalating agent; and the glass fiber is alkali-free glass fiber processed by a coupling agent. The preparation method comprises the following steps of mixing the components, antioxidant and lubricating agent; melting, blending and extruding the mixture by a double-screw extruder to obtain the polybutylene terephthalate composite material which has high performance and is synergistically filled by montmorillonite and glass fiber. The composite material is high in modulus, good in toughness, high in temperature resistance and high in CTI value; the processing environment is friendly; the composite material are free of halogen and phosphorus, meets an ROSH (The Restriction of the use of Certain Hazardous Substances in Electrical and Electronic Equipment) principle, and is widely applied to the field of engineering plastics.

The utility model discloses a heat-resistant vinyl aromatic monomer copolymer compounding method. The method used amine in the axe-type reaction device as the amine imide agent and enables the vinyl aromatic monomer - maleic anhydride unit opening ring of the maleic anhydride copolymer to become the maleic acid amide unit in the organic solution system; and then the vinyl aromatic monomer is arranged in the axe-type reaction device or in a exhaust twin-screw extruding device for reaction. Then the vinyl aromatic monomer is gotten rid of organic solution and is dried to generate heat-resistant vinyl aromatic monomer copolymer. The heat-resistant vinyl aromatic monomer copolymer generated in the method is of good anti heat resistance, thermal stability, processing mobility as well as compatibility with polar material.

The invention relates to a drive device for a twin-screw extruder. The drive device comprises at least one input shaft (17, 25), to which a motor (16, 16') can be coupled; a first output shaft (60) to which a first screw shaft of the twin-screw extruder can be coupled; a second output shaft (84) to which a second screw shaft of the twin-screw extruder can be coupled; a planetary gearing group (8); and a power division transmission (10). The output shafts (60, 84) are arranged in radial bearings (101) on the one hand and in axial main bearings (88, 92) for withstanding axial thrust on the other hand. The axial main bearings (88, 92) of the output shafts (60, 84) are designed as hydrostatically supported axial sliding bearings.

The invention provides a method for preparing a lithium battery negative electrode by compounding silicon, carbon and silicon dioxide in an extruder, which comprises the following steps: carrying outmixed heat treatment on nano silicon powder and nano silicon dioxide to obtain silicon monoxide steam, introducing the silicon monoxide steam into a twin-screw extruder by using a flow guide pipe, then respectively adding graphite powder, CMC, SBR, CTAB, PTFE and paraffin powder into the twin-screw extruder for mixing and extrusion, and then screening the extruded powder through a screen at a discharge port to obtain the product. According to the method provided by the invention, the silicon monoxide steam, the graphite powder and other auxiliaries are mixed and extruded in the screw extruderto obtain the effectively coated silicon monoxide/carbon negative electrode material, so that the volume effect of the silicon-based negative electrode material in use can be effectively avoided, andmeanwhile, the whole preparation process is simple and controllable; and the problems of high equipment requirement and complex preparation process in the original process are solved, and the method has a wide application prospect.

The invention relates to a method for processing healthy and efficient bait. The method comprises the steps of (1) taking a raw material according to a specified weight, feeding the raw material intoa mixer and adding water for stirring treatment, and heating after the stirring is completed to obtain a mixture to be used, (2) taking the mixture and putting the mixture on a tray, placing the mixture into a baking oven and baking the mixture at the high temperature of 120 DEG C until the moisture in the mixture is dried to form a large block, (3) evenly brushing a surface with sesame oil and putting the large block into a baking oven at the temperature of 110 DEG C to dry moisture, and (4) cooling the mixture to a normal temperature and sending the mixture into a freezer, and (5) putting the frozen mixture into an electric furnace for heating to wait for the melting of the mixture, wherein the melted mixture is extruded and granulated in a twin-screw extruder to produce the bait, and the bait is packaged in a PVC bag. The bait produced by the processing method of the invention has the advantages of low cost, good fish attracting effect, high fishing rate, healthfulness and is not harmful to fish.

The invention relates to a cooling system for a drive motor in a twin-screw extruder. The cooling system is mainly used for cooling the drive motor in the twin-screw extruder so as to ensure that the drive motor is not overheated. The cooling system is characterized by comprising a drive motor box (2) which is mounted on the most front end of the twin-screw extruder (1), a cooling hole (2.1) is formed in the side wall of the drive motor box (2), the top of the drive motor box (2) is connected with an aspirator pump (3), and an air inlet of the aspirator pump (3) is connected with an air inlet pipe (4). The cooling system can be used for effectively cooling the drive motor, thereby guaranteeing the long service life of the drive motor.

The invention provides direct-spun polyester colored staple fiber production equipment and a direct-spun polyester colored staple fiber production method. The equipment comprises a melt pipeline, a double-screw extruder, a dynamic mixer, a static mixer, a metering pump and a spinning box body, wherein the melt pipeline and the double-screw extruder are respectively connected by the same metering pump; the dynamic mixer is simultaneously connected with the melt pipeline and the double-screw extruder; and the static mixer, the metering pump and the spinning box body are sequentially connected with the dynamic mixer. Synthesized polyester melt is quantificationally distributed into two parts through the metering pump; one part enters the melt pipeline, and the other part enters the double-screw extruder; meanwhile, pigment powder and additives of the pigment powder are continuously added into the double-screw extruder to be primarily mixed with the polyester melt; colored melt in the double-screw extruder is re-injected into the melt pipeline to be mixed with the original blank polyester melt through a pressurizing pump; the mixture enters the dynamic mixer; the melt and the pigment are uniformly mixed, and are then further mixed through the static mixer; and the uniformly mixed colored polyester melt enters the spinning box body. By using the dynamic mixer, the pigment in the colored melt is uniformly mixed, the quality of the colored fiber is improved; and the use period of an assembly is prolonged.

The present invention provides a thermally conductive insulating material of a high power LED substrate, which material is prepared using the following steps: in parts by weight, adding 30-80 parts of a nano-scale inorganic thermally conductive powder into 3-20 parts of a grafting modifier, then adding 0.1-10 parts of a dispersant, stirring and dispersing so as to disperse the nano-scale inorganic thermally conductive powder in the mixed agent of the grafting modifier and the dispersant; adding the product of the above step into an ultrasonic spray-drying apparatus to carry out drying so as to prepare a composite material; adding the product from the above step and 7-40 parts of a polyolefin resin together into a twin-screw extruder, and at the same time adding 0.1-2 parts of an initiator to initiate the graft copolymerization carried out in the twin-screw extruder, so as to extrude the pellets and prepare the thermally conductive insulating material. By first grafting the inorganic nano thermally conductive powder into the polyolefin resin by means of the graft modifier, the problem of the agglomeration of inorganic nano thermally conductive powder caused by directly adding inorganic nano thermally conductive powder into the resin material is avoided.

The invention discloses a waste PET composite material. A silane coupling agent can be mixed with waste PET and a polyolefin elastomer after being mixed and dried with waste resin powder with a mass ratio of 1-10 : 100, so that a mixture can be obtained, wherein the mass ratio of the waste PET to the waste resin powder is 5-9 : 1-5, and the addition amount of the polyolefin elastomer accounts for1-20% of the mass of the mixture; and extrusion granulation of the mixture can be realized through a twin-screw extruder. Through a modification technology to develop the composite material, the comprehensive utilization of the waste PET and waste resin can be realized, and the disadvantage of poor PET impact property can be overcome.

The invention discloses a heat-conducting POM (polyformaldehyde) material and a preparation method thereof. The heat-conducting POM material is prepared from the following components in parts by weight: 60-75 parts of POM, 8-15 parts of silicon carbide, 6-10 parts of polyethylene glycol, 1-3 parts of melamine, 1-3 parts of di(dioctylpyrophosphato) oxyacetate titanate, 0.5-2 parts of 2,6-di-tert-butyl-4-methylphenol and 0-1 part of sodium carbonate. The preparation method comprises the following steps: fully mixing the raw materials, adding the mixture to a twin screw extruder, extruding and granulating so as to obtain the heat-conducting POM material. The heat-conducting POM material prepared by the method has good compatibility, mechanical property and heat-conducting property.

The invention provides a metal texture, scratch-resistant PC/ABS composite material and a preparation method thereof, which comprises 45-65 parts of PC resin, 35-55 parts of ABS resin, 5-10 parts of ASA, and 5-10 parts of compatibilizer , 10-15 parts of metallic pigments, 0.1-0.5 parts of antioxidant, 0.1-0.5 parts of lubricant, after adding into a mixer and mixing uniformly, adding in a twin-screw extruder; Metal texture, scratch-resistant PC/ABS composite material. The metallic texture and scratch-resistant PC/ABS composite material of the present invention is suitable for use in the fields of home appliances, automobiles, and electronic appliances, and plastic parts that require metal texture and no spraying for materials.

The invention discloses a method for controlling discoloration of nylon. The method comprises the following steps: firstly, uniformly stirring magnesium oxide and nylon; secondly, adding organic silicone oil, with the mass being 0.01+/-0.001 percent of that of nylon, into a material formed in the first step, and uniformly stirring; thirdly, uniformly stirring titanium dioxide of a material formedin the second step with toner being added; fourthly, performing extrusion granulation through a double-screw extruder. The method is simple to operate, adding is performed directly during normal production and granulation, and excessive operation processes are not required to be additionally added; the use effect is good, discoloration of nylon color blended products is effectively prevented, andthe weather resistance and the temperature resistance of nylon products are improved; the price is low, raw materials are easy to get, the price is low, and the method is simple and convenient compared to the manufacture of novel coloring agent aiming at characteristics of nylon; the negative effect on the mechanical properties of nylon cannot be caused.

The invention discloses a preparation method of biodegradable cast film paper, which comprises the steps of weighing the following raw materials in parts by weight: 60 to 70 parts of poly (butylene terephthalate)-adipate, 30 to 40 parts of polylactic acid, 10 to 15 parts of polyethylene glycol, 2 to 4 parts of citrate, 5 to 8 parts of nanofibers, 2 to 4 parts of silicon dioxide and 2 to 4 parts of a silicone slipping agent, wherein the molecular weight of the silicone slipping agent is 0.9-1.1 million. The manufacturing method comprises the steps of mixing the raw materials, carrying out mixing extrusion through a twin-screw extruder, and granulating the extruded material to prepare plastic particles; preparing the plastic particles into a film by adopting a tape casting method; and performing uniaxial stretching on the film, and performing stretching and shaping to obtain a finished product. By adopting the manufacturing method of the biodegradable cast film paper, the problem that a cast film cannot be degraded is solved, meanwhile, the water vapor permeability is relatively good, the cost is reduced, and the preparation method is simple.