325results about How to "Improve spin performance" patented technology

The invention provides a solid golf ball having a solid core and a cover layer that encases the core and has an outermost layer on an outside surface of which are formed a plurality of dimples. The solid core is formed of a rubber composition composed of 100 parts by weight of a base rubber that includes 60 to 100 parts by weight of a polybutadiene rubber having a cis-1,4 bond content of at least 60% and synthesized using a rare-earth catalyst, 0.1 to 5 parts by weight of an organosulfur compound, an unsaturated carboxylic acid or a metal salt thereof, and an inorganic filler. The solid core has a deformation, when compressed under a final load of 130 kgf from an initial load of 10 kgf, of 2.0 to 4.0 mm, and has a specific hardness distribution. The cover layer is formed primarily of a thermoplastic or thermoset polyurethane material and has a thickness of 0.5 to 2.5 mm, a Shore D hardness at the surface of 50 to 70 and a flexural rigidity of 50 to 300 MPa. The golf ball has a deformation, when compressed under a final load of 130 kgf from an initial load of 10 kgf, of 2.0 to 3.8 mm. The solid golf ball is advantageous overall in competitive use.

The invention provides a solid golf ball having a solid core, a cover layer that encloses the core, and a plurality of dimples formed on an outside surface of an outermost layer of the cover. The solid core is formed of a rubber composition composed of 100 parts by weight of a base rubber that includes 60 to 100 parts by weight of a polybutadiene rubber having a cis-1,4 bond content of at least 60% and synthesized using a rare-earth catalyst, 0.1 to 5 parts by weight of an organosulfur compound, and an unsaturated carboxylic acid or a metal salt thereof, an organic peroxide and an inorganic filler. The solid core has a deformation, when subjected to loading from an initial load of 10 kgf to a final load of 130 kg, of 2.0 to 3.5 mm, and has a specific hardness distribution. The cover layer, which is formed primarily of a thermoplastic or thermoset polyurethane material and has a thickness of 0.5 to 2.5 mm, a Shore D hardness at the surface of 50 to 70 and a flexural rigidity of 50 to 300 MPa. The core has a surface hardness which is from 1 to 15 Shore D hardness units lower than the surface hardness of the core. The golf ball has a deformation, when subjected to loading from an initial load of 10 kgf to a final load of 130 kgf, of 2.0 to 2.9 mm. The solid golf ball is advantageous overall in competitive use.

The characteristics of the invention are that the spin finish aid of the organic polymer containing one or multiple of sintering auxiliary agents is in troduced before spinning. The sintering auxiliary agent is at least one of B, Al, Y, Mg, Ti, Zr. The sintering auxiliary agent can be contained in one organic polymer or different organic polymers. The organic polymer is the polymer in silazane class and silicone carbon hydride. The method improves the spinning quality. The fiber produced can bear temperature higher than 1500 deg.C with diameter less than 10 micros, possessing good antioxidation property and mechanical property, being as the new generation of the reinforcement fiber. The method is easy to realize the continuous production.

The invention relates to a method for preparing polyester fibers with pearly luster. The method comprises the following steps: (1) pearlescent pigment agglomerate and full-dull PET fiber forming resin slice are blended according to the weight ratio of 5-20 to 80-95; and after drying, the water content is less than 100PPM, and the slice is delivered to a feeding port of an extruder and enters an screw extruder for heat fusing and compression; (2) the temperature is controlled to between 290 and 305 DEG C, fusant extruded out by the rotary screw rod enters a metering pump through a distributing pipe and a static mixer, delivered to a spinning component, filtered by a sea sand layer and pressed into a spinning plate to form fusant current which is cooed to form in a spinning cabinet, and the surface of a filament bundle is covered by a spinning finish; and 3. the spinning speed pre-extension is between 2, 500 and 3, 500m / min, the winding carry rate is between 5 and 15 percent for wind-forming, and the full-dull pearlescent polyester fiber POY is obtained. The manufacturing process is easily realized, and is convenient to improve the pearlescent fiber spinning effect and simultaneously provides the fibers with light extinction performance, and the pearlescent pigment has excellent performance and little feed rate.

The invention relates to a technology for producing poly(p-phenylene benzobisoxazole) (PBO) fibers, and belongs to the field of high performance fiber production. The technology comprises the steps: A, degassing, pre-polymerizing and defoaming; B, post-polymerizing and defoaming; C, spinning and solidifying; D, post-treating; and E, heat-treating and the like. Through optimizing equipment and controlling parameters, a plurality of problems of the prior art are solved. The technological process, equipment cooperation and parameter control of the basic technical scheme are taken as an integral system, are cooperated with each other and are dispensable, materials can be effectively transferred, the scale polymerizing and subsequent scale spinning of the PBO polymer are realized, and a high-quality PBO fiber product is obtained.

The invention provides a solid golf ball having a solid core, a cover layer that encloses the core, and a plurality of dimples formed on an outside surface of an outermost layer of the cover. The solid core is formed of a rubber composition composed of 100 parts by weight of a base rubber that includes 60 to 100 parts by weight of a polybutadiene rubber having a cis-1,4 bond content of at least 60% and synthesized using a rare-earth catalyst, 0.1 to 5 parts by weight of an organosulfur compound, and an unsaturated carboxylic acid or a metal salt thereof, an organic peroxide and an inorganic filler. The solid core has a deformation, when subjected to loading from an initial load of 10 kgf to a final load of 130 kg, of 2.0 to 3.5 mm, and has a specific hardness distribution. The cover layer, which is formed primarily of a thermoplastic or thermoset polyurethane material and has a thickness of 0.5 to 2.5 mm, a Shore D hardness at the surface of 50 to 70 and a flexural rigidity of 50 to 300 MPa. The core has a surface hardness which is from 1 to 15 Shore D hardness units lower than the surface hardness of the core. The golf ball has a deformation, when subjected to loading from an initial load of 10 kgf to a final load of 130 kgf, of 2.0 to 2.9 mm. The solid golf ball is advantageous overall in competitive use.

The invention relates to a novel nano electrostatic frictional spinning device. the device comprises a feeding area I, a feeding area II and a pair of frictional rollers, wherein the yarns in the feeding area I are conveyed in the axial direction of each frictional roller shaft; the yarns in the feeding area II are conveyed in the radial direction of each frictional roller shaft; the feeding area I and the feeding area II are respectively used for spinning and conveying of yarn fiber combination bodies and electrostatic nano fibers; the yarn fiber combination bodies and the electrostatic nano fibers are combined at the pair of frictional rollers rotating in the same direction; yarn strips are gyrated under the effect of gyring torque generated by the frictional rollers so as to form covering yarns with the nano fibers at the outside or inside, or form the covering yarns with the nano fibers and the yarn fiber combination bodies at the outside and the nano fibers at the inside; then the covering yarns are drawn out through a stretching roller. With the adoption of the device, the yarn structure is compact; the problems of leather and yarn evenness caused by the nano fibers can be avoided; the yarns are high in moisture absorbing performance, oil absorbing performance and filtering performance; the utilization rate of the electrostatic spun nano fibers can be increased, and the application field of an electrostatic spinning machine can be expanded.

The invention discloses a special idle gear system for a four-roller compact spinning machine. The system comprises an idle gear assembly for driving; the idle gear assembly comprises a maser idle gear, a first auxiliary idle gear and a second auxiliary idle gear which are arranged on either side of the maser idle gear respectively. The system has the advantages of rational and compact structure and low renovation cost, and can help improve spinning effect.

The invention belongs to the technical field of metal machining, and particularly relates to a preparation machining method of a large-diameter pipe material and a special-shaped pipe fitting. The preparation machining method comprises the following steps of prefabricating a hollow blank by punching, carrying out isothermy or hot mould combined extrusion on the hollow blank, machining the inner and outer surfaces of an extruding tube blank, and carrying out multi-pass cold or hot power cone spinning on the machined tube blank; carrying out intermediate heat treatment (which can be annealing or solution treatment) on a semi-finished pipe material product; repeatedly and alternately carrying out multi-pass power cone spinning and the intermediate heat treatment, and carrying out power spinning on the finished pipe material product; carrying out multi-pass composite spinning forming on the semi-finished pipe material product after heat treatment so as to obtain the special-shaped pipe fitting; and carrying out acid pickling and cleaning on the obtained pipe fitting and special-shaped pipe fitting and then carrying out thermal treatment on the finished product. The preparation machining method of the large-diameter pipe material and the special-shaped pipe fitting provided by the invention has the advantages that the large-diameter pipe material and the special-shaped pipe fitting are prepared and machined, the product organization is uniform, the combination property is high, the forming is effort-saving, the additional value is high, and a product has good popularization and application prospect and definite economic benefits and social benefits.

The invention relates to a microfluid chip and a spinning method thereof, particularly to a microfluid chip, width of a microfluid passageway being gradually reduced from an inlet to an outlet, and a spinning method thereof. The microfluid chip of the invention comprises a substrate and a diaphragm, wherein the diaphragm is provided with a groove, a surface of the diaphragm, where the groove is arranged in, is bonded with the substrate to form the microfluid passageway, the depth of the whole pathway is uniform, the width (b) of the microfluid passageway is gradually reduced from the inlet tothe outlet. By the spinning method of the microfluid chip provided by the present invention, spinning stock solution is injected into the inlet of the microfluid passageway of the microfluid chip andfinally flows out from the outlet of the microfluid passageway. The microfluid chip can perform dry spinning under atmosphere condition, conduct wet spinning in polymer coagulation bath, or conduct electrostatic spinning under high voltage electric field. The chip provided by the invention is simple in preparation and low in cost. Besides, drawing and cutting conditions needed by the solution in the chip can be regulated and controlled according to the requirement of spinning technology, thus, the chip has good application prospect.

The invention discloses a method for preparing superfine dyeable polypropylene fiber by a sea-island composite spinning method. The method comprises the following steps: (1), copolyester additive is prepared through the method of combining melt phase polycondensation and solid phase polycondensation; (2), the additive, compatilizer for polyolefin elastomer to graft multiple monomers, and polypropylene resin are subjected to melt-blending granulation in a double-screw extruder, and the dyeable modified polypropylene resin with the dispersed phase grain diameter less than 1 mum is prepared; and (3), the dyeable modified polypropylene resin prepared in the step (2) is used as island, alkaline solubility polyester is used as sea, and the sea-island composite processing is carried out; and the fiber is subjected to decrement by the later alkali, and the superfine dyeable polypropylene fiber with the monofilament fineness less than 0.2dtex is prepared. According to the superfine dyeable polypropylene fiber prepared by the method, the thermostability is high, the spinning processability is good, and fabric woven by the fiber has the superior properties of lightness, mildness, breathability and warm keeping, and is particularly suitable for high-grade bedding, high-grade underwear and the like.

The invention relates to polymer / filler / metal composite fiber. The polymer / filler / metal composite fiber comprises polymer fiber containing metal short fiber and a filler, the metal short fiber is distributed in the polymer fiber as a dispersion phase and is in parallel distribution along the shaft of the polymer fiber, and the filler is dispersed in the polymer fiber and is distributed among the metal short fiber; the filler is not fused at a polymer processing temperature; a metal is a low-melting-point metal, is at least one selected from single-composition metals and metal alloy, and has the melting point between 20 DEG C and 480 DEG C and lower than the polymer processing temperature; the volume ratio of metal short fiber to polymer fiber is 0.01:100-20:100; and the weight ratio of the filler to the polymer is 0.1:100-30:100. By using the composite fiber, the volume resistivity is reduced, the wire fracture rate is reduced, and the surface of the fiber is smooth. The preparation method is simple, relatively low in production cost and easy for industrialized batch production.

The invention relates to a bionic nerve graft used for peripheral nervous recovery and a preparation method and application thereof. The bionic nerve graft comprises a chitosan film conduit and a fibrous protein hydrogel beam positioned in the chitosan film conduit, wherein the fibrous protein hydrogel beam is prepared from fibrous protein through an electrospinning technique. The bionic nerve graft prepared by the preparation method is formed by the filling of the chitosan film conduit and the fibrous protein hydrogel beam of a multi-stage orientation structure, wherein a nerve regrowth space is effectively supported by a chitosan film, the orientational regeneration of a nerve axon is effectively guided by the fibrous protein hydrogel beam of multi-stage orientation, the cell affinity and the mechanical property of whole materials are good, and in addition, degrading speed and the repairing speed of peripheral nervous tissues are matched.

The invention relates to a sesaron combing and sorting method and a device; combed ramie stripes with different specifications and lengths are obtained through a plurality of layers of combing; the split degree of the ramie stripes is decided by comb needle models used in all the layers of combing; and the lengths of the ramie stripes are changed by adjusting a pulling vehicle. In a combing and sorting mechanism of the device, circular comb needle strips are lined in a circumference of 0 to 270 degrees respectively through a rack method and a rack and needle row combined method, and top combs are in a single row or a plurality of rows. A pulling separation mechanism comprises the pulling vehicle, the pulling vehicle is arranged on a regulation frame, the regulation frame is provided with a rod and a circular arc-shaped chute, a bolt is inserted into the circular arc-shaped chute, the bolt is fastened on a frame, the bolt is loosened, and the regulation frame can slide along the circular arc-shaped chute by triggering the rod. At least two pairs of curl rollers are arranged in a strip discharge mechanism. The ramie stripe fibers processed by the method and the device are even and uniform, have short fiber rate, uniform fiber length and low ultra-long length fiber content, so that the fibers are more parallel and straighter, the operation is convenient, the efficiency is high, and the labor intensity is low.

The invention discloses a method for preparing fine denier dyeable polypropylene fiber by sheath-core compounding. The method comprises the following steps: (1), copolyester additive is prepared through the method of combining melt phase polycondensation and solid phase polycondensation; (2), the additive, compatilizer for polyolefin elastomer to graft multiple monomers, and polypropylene resin are subjected to melt-blending granulation in a double-screw extruder, and the dyeable modified polypropylene resin with the dispersed phase grain diameter less than 1 mum is prepared; and (3), the dyeable modified polypropylene resin prepared in the step (2) is used as a sheath layer, the polypropylene resin is used as a core layer, and the sheath-core compounded fine denier dyeable polypropylene fiber with the monofilament fineness less than 0.5dtex is prepared. With the method, the operating performance is obviously improved, the mechanical property of the fiber is improved, and the cost is greatly reduced; and compared with single-component dyeable polypropylene fiber, the fine denier dyeable polypropylene fiber has the obvious advantages in the aspects of production efficiency, product quality, cost competitiveness and the like and also can meet the application requirement on high-grade clothing and home textile shell fabric.

The invention provides a preparation method of petroleum-based mesophase pitch having a uniform molecular structure and a low softening point. The method comprises carrying out reduced pressure distillation on catalytic cracking oil slurry of naphthenic crude oil, taking a fraction having a boiling point of 380 and 540 DEG C as a raw material, carrying out a reaction process at a temperature of 380 to 450 DEG C under pressure of 4 MPa for 1 to 14 hours to obtain petroleum asphalt having a softening point of 110 to 180 DEG C, adding 1 to 15wt% of a hydrogen donor into the raw material, carrying out a self-pressure reaction process at 380 to 420 DEG C under nitrogen initial pressure of 5MPa for 1 to 8h, reducing the pressure to the normal pressure, cooling the product to 350 DEG C, carrying out high purity nitrogen purging for 0.5h to obtain hydrogenated asphalt, and carrying out a reaction process on the hydrogenated asphalt at 400 to 480 DEG C under pressure of 4MPa for 2 to 16h to obtain high quality mesophase pitch. The preparation method has simple processes and realizes a low production cost. The petroleum-based mesophase pitch has anisotropic structure content greater than 98%, a lower softening point of 230 to 250 DEG C, has a large basin type optical structure and good spinnability and is an excellent precursor for production of high modulus carbon fibers.

The invention provides an ultra-high molecular weight polyethylene resin composition. The ultra-high molecular weight polyethylene resin composition is characterized in that 100 parts of ultra-high molecular weight polyethylene resin, 0.001 to 0.5 part of antioxidant and 0 to 0.6 part of mineral filler are included according to parts by weight, wherein the molecular weight of the ultra-high molecular weight polyethylene resin is between 2,000 thousand and 5,000 thousand, the average particle diameter ranges from 80 mum to 300 mum, the particle size distributional width is less than 3.0, the tensile breaking stress is higher than 25 MPa, and the tensile breaking strain is higher than 200 percent. The ultra-high molecular weight polyethylene resin composition overcomes the defects that fibers are easily broken and the fiber property is unstable during the spinning process of the present ultra-high molecular weight polyethylene fiber; the ultra-high molecular weight polyethylene resin has better spinning effect; and the fiber has the characteristics of high strength, high modulus, stable property, and the like.

The invention discloses an automatic processing system for dyeing loose fibers. The system comprises a dry opening machine, a disk forming machine, a dyeing machine, a dewatering machine, a wet opening machine, a drying machine and an automatic packing machine which are sequentially connected, wherein, a pre-opening machine is connected between the dewatering machine and the wet opening machine, the pre-opening machine comprises a rotatable disk, the disk is installed on a lifting rack, and a cotton peeling roller is arranged above the disk. A hydraulic disk jacking machine can also be arranged between the dyeing machine and the dewatering machine. The invention is the first automatic production line for dyeing the loose fibers, can be suitable for dyeing various fibers, and can increase the degree of automatic production, shortens the production period of entire dyeing processing, increases the production efficiency, reduces the intensity of labor production, and especially greatly increases safety.

The invention discloses a production method of polypropylene cooling masterbatch, including the following steps: (1) mixing: the following components by parts by weight are mixed for 10-20 minutes: 50-90 parts of polypropylene resin, 0.5-9.5 parts of dispersing agent, 0.1-0.6 part of surface modifier, 0.1-2.7 parts of lubricant and 0.2-0.8 part of liquidity regulator, and then the following components by parts by weight are sequentially added: 0.1-0.9 part of light stabilizer, 0.1-1.6 parts of antioxidant and 0.2-7 parts of molecular weight regulator, and mixing is carried out for 5-15 minutes; (2) pelletizing: the mixed material is subject to melt extrusion at 130-230 DEG C and then grain-sized dicing is carried out. The invention adopts compound peroxide as molecular weight regulator and adopts compound antioxidant, compound dispersing agent, compound light stabilizer and compound lubricant, and the produced polypropylene cooling masterbatch has the advantages of high initiator content, good dispersity and obvious cooling effect and modification effect.

The invention provides a colored flame retardant polypropylene fiber as well as a preparation method and application thereof. The fiber comprises the following components by weight: 1-10 parts of a color master batch, 1-20 parts of a flame retardant master batch and 98-70 parts of polypropylene fiber forming slices; the flame retardant master batch is a blend of a phosphorous flame retardant, modified magnesium hydroxide, modified nano aluminum hydroxide and the polypropylene fiber forming slices, and the parts of the phosphorous flame retardant, the magnesium hydroxide and the aluminum hydroxide by weight equal 10:3-5:0-1.5. The flame retardant has the advantages of excellent performance, improved pigment dispersivity and polypropylene fluidity, improved spinning performance, high decomposition temperature, good thermal stability, less smoke amount, no toxicity, no corrosiveness and no suffocation, and does not affect original performance of materials and production requirements basically; the performance indexes of obtained polypropylene filament yarn meet standard requirements; the fiber is soft and elastic, and has the advantages of good flame retardant performance and long flame retardant period.

The invention relates to wook lubricating oil, a preparation method for the wook lubricating oil, and an application of the wook lubricating oil in improvement of fiber spinning performance. The wook lubricating oil comprises: a high molecular polymer, a softener, an emulsifier, an organic metal salt and an assistant agent, wherein the assistant is prepared through combination of a non-ionic surfactant and an anionic surfactant. The preparation method comprises: carrying out emulsifying and stirring for the raw materials to prepare the wook lubricating oil. The application method for improvement of the fiber spinning performance comprises: applying the wook lubricating oil on ceiba fiber or crystal cotton fiber at a temperature of 20-30 DEG C before the spinning process, then placing the treated ceiba fiber or the treated crystal cotton fiber in a room with constant temperature and constant humidity to carry out balancing for 12-48 hours; then carrying out dispersing and uniformly mixing, followed by carrying out the follow-up spinning process. The wook lubricating oil provided by the present invention has characteristics of easy washing and removal, environmental protection, simple operation of the apply method, energy saving, easy industrial production. In addition, with the wook lubricating oil provided by the present invention, the ceiba fiber or the crystal cotton fiber has better carding performance, bar forming performance and spinning performance; the spinning bottle neck of the fiber in the field of textile is overcome.

The invention discloses a preparation method of an ultrafine composite fiber with high wet transmitting performance, comprising the following steps of: 1) firstly preparing a copolyester additive having melting point of 180-220 DEG C and intrinsic viscosity of 1.0-1.2 dl / g and containing aliphatic dibasic acid and aliphatic dihydric alcohol by the combination of melt polycondensation and solid state polycondensation; 2) granulating by melt blending of the additive, a polyolefin elastomer graft multi-monomer compatilizer and polypropylene resin in a double screw extruder so as to prepare dyeable modified polypropylene resin with the particle size of dispersed phase being less than 1 micron; and 3) using the dyeable modified polypropylene resin prepared from the step 2) as a scaffold, using polyamide as splinter, and splitting fiber through mechanical force in subsequent alkali deweighting or processing into the ultrafine composite fiber with filament number being less than 0.2 dtex. The ultrafine composite fiber prepared by the method is soft, and has characteristics of high thermal stability, good spinning performance and excellent moisture conductivity and moisture absorption performance.

The invention relates to a method for preparing environment-friendly cigarette tows, which comprises the following steps of: drying and crystallizing, melting spinning, drafting and tension-finalizing, crimping, drying and thermal finalizing, wherein the drafting and tension-finalizing step employs a roller built-in heating way. The cigarette tows prepared by the method disclosed by the invention are higher in temperature of the crimping and the drying and thermal finalizing process steps in the preparation of the tows, shorter in production period, and improved in quality. And meanwhile, control of moisture can facilitate hot processing de-polymerization and hydrolysis degrees of polylactic acid, as a result, the spinning performance of the modified polylactic acid and the performance of tow products are improved.

The invention belongs to the technical field of polymer material synthesis, and particularly relates to a functional polyester production system. The functional polyester production system comprises apolyester main production system, and further comprises a functional powder slurry concentrate preparation system, the polyester main production system comprises an esterification system, a pre-polycondensation system and a final polycondensation system which are connected in sequence, the functional powder slurry concentrate preparation system comprises an online adding device which is connectedwith the esterification system or a part between the esterification system and the pre-polycondensation system. The functional powder slurry concentrate preparation system is introduced in the polyester main production system, and can continuously prepare a functional powder slurry concentrate with low hydroxyl value and low pressure filtration value, and the prepared functional powder slurry concentrate and a polyester oligomer are uniformly mixed for polycondensation reaction to obtain functional polyester with uniformly dispersed functional powder. The invention further relates to a functional polyester production method.

The present invention provides a method for preparing carbon nanotube fibers with improved spinning properties using a surfactant and carbon nanotube fibers prepared by the method. According to the method for preparing carbon nanotube fibers of the present invention, the addition of a surfactant during the preparation of carbon nanotubes interrupts and delays the agglomeration of catalyst particles, which reduces the size of the catalyst particles and uniformly disperses the catalyst particles that play a key role in the formation of carbon nanotube fibers, thus increasing the strength and conductivity of carbon nanotube fibers and improving the spinning properties. While convention methods prepare carbon nanotube fibers by injecting a catalytic material for the synthesis of carbon nanotubes in a high-pressure supercritical state to be uniformly dispersed, the present invention uses a dispersant and thus does not require the injection in a high-pressure supercritical state.

The invention discloses a power spinning spinnability analysis value simulating method, which comprises the steps of acquiring technological parameters of a spinning roller, a mold and a panel veneer; calculating coordinates of a reference point MO of the spinning roller before being subjected to spinning forming according to the technological parameters; calculating the locus of the spinning roller according to the technological parameters and the reference point MO of the spinning roller before being subjected to spinning forming; using finite element software to carry out finite element modeling, and drawing grids of the panel veneer according to the obtained technological parameters, the obtained reference point MO of the spinning roller before being subjected to spinning forming and the obtained locus of the spinning roller to obtain a power spinning finite element model; carrying out analog simulation on the obtained power spinning finite element model so as to obtain coordinates of multiple points on the outer generatrix of a workpiece generated by final forming of the panel veneer, and coordinates of multiple points on the inner generatrix on the grids of the panel veneer corresponding to the coordinates; subtracting the corresponding coordinates of the points on the inner generatrix on the grids of the panel veneer from the coordinates of the multiple points on the outer generatrix so as to find out the minimum difference of the two coordinates to be used as the minimum thickness of the panel veneer. The power spinning spinnability analysis value simulating method can be used for guiding power spinning production and has the characteristics of low cost, high efficiency and short period.

The invention relates to an antistatic polyurethane production technology which is characterized in that spinning dope for producing urethane elastic fire is added with antistatic agent; the addition amount of the antistatic agent is 1 to 5 percent of the solid content in the spinning dope; and the antistatic agent is anionic antistatic agent, cationic antistatic agent, ampholytic type antistatic agent or non-ionic antistatic agent. The antistatic performance of the antistatic polyurethane filament prepared by the technology has significant advantages to the conventional polyurethane filament under the condition of using same spinning finish; under the conditions with the temperature of 25 DEG C and the relative humidity of 65 percent, the half life of the antistatic polyurethane filament is near 0s, the static voltage is less than 1kV, and the specific resistance is less than 108 omega*cm; and the invention is suitable for back-end purposes such as high-speed tricot warping, cotton bale, and the like.