320results about How to "Improve spin performance" patented technology

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.

A three-piece solid golf ball has excellent flight performance when hit by a driver or a long or a middle iron, and good spin performance when hit by a short iron or approach-shot. The three-piece solid golf ball has a core with a center and intermediate layer on the center; a cover on the core, the center with diameter 29 to 38 mm, hardness difference in JIS-C hardness at any point between its center to surface not more than 7, specific gravity lower than the intermediate layer, the surface hardness in JIS-C hardness of the intermediate layer being higher than the hardness determined at any point in the center; the difference between surface hardness of intermediate layer and hardness at any point in center being within 3° to 20° JIS-C, and cover having a Shore D hardness of less than 60.

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 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 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 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 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 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 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.