46results about How to "High degree of abnormality" patented technology

The invention discloses a production method and relevant products for fine denier cross-type deformed terylene filament, and belongs to the technical field of terylene fibers. During production of the fine denier cross-type deformed terylene filament, the invention adopts metal sand with features of high stability, high filature pressure and high deformed extent to perform melt body filtration; meanwhile, a cooling process is utilized on a cross air flow device integrated with a calm zone and a slow cooler, and combined with slow cooling and intensive cooling; moreover, suitable improvement is done to an oiling position, so as to successfully spin fine denier cross-type deformed terylene POY and DTY filament. Monofilament size of the POY filament is 0.78 to 1.19 d.p.f; monofilament size of the DTY filament is 0.5 to 0.7 d.p.f; corss sections of the fibers are similar to a regular cross shape. The invented fine denier cross-type deformed fiber has advantages of high speed of water absorption, water delivery, diffusion and volatilization, and maintaining users' skin dry and cool. Meanwhile, small monofilament size of the fiber can greatly increase flexibleness and perfect hand feeling of the fabric.

The invention relates to the technical field of functional and differentiated fiber production, and aims to provide flexible and heterogeneous nylon-6 fiber and a preparation method thereof. The flexible and heterogeneous nylon-6 fiber is formed by V-shaped jet micropore spinning and a melting spinning method by using fiber-level nylon-6 chips as substrates; the internal part of the section of the flexible and heterogeneous nylon-6 fiber is hollow, and the periphery of the section is triangular; and the relative radial profile degree of the cross section of the flexible and heterogeneous nylon-6 fiber is 20 to 30 percent, and the relative section profile degree is 35 to 55 percent, and hollowness of the flexible and heterogeneous nylon-6 fiber is 10 to 30 percent. The fiber has good mechanical properties, and high elasticity, hygroscopicity and heat retention, and can be widely used for the fields of underwear, socks, clothing and the like.

The invention discloses a porous ultrafine X-shaped polyester fiber and a preparation method of the porous ultrafine X-shaped polyester fiber. According to the porous ultrafine X-shaped polyester fiber, a spinning micropore structure of a spinning jet is in a shape of symmetric X blades; an obtuse angle ranges from100 to 110 degrees, and the length-width ratio of the blade is 5 to 8: 1; a cooling formation technology is the combination of annealing and cross air blow cooling; a first hot roll temperature under a thermal forming technology is at 88 to 92 DEG C, and a second hot roll temperature is at 125 to 130 DEG C, and the coiling is carried out at a speed of 3800 to 4200m / min. The fiber prepared by the preparation method provided by the invention is high in profile degree, and different fine groove capillary shapes are formed on the section; high porosity among the fibers is ensured, and the fibers are light in weight; the humidity conductivity and humidity absorbing performance of the fibers are effectively improved, and the water retaining performance and air permeability are effectively improved as well; and meanwhile, the fiber and fabric manufactured by the fiber have good effect of dyeing, and are easily dyed, and have the characteristics of being full in color and bright in gloss; and the fabric touches fluffy and elastic.

The invention belongs to the field of chemical fiber shaping, and discloses a technology for processing a profiled fiber and a spinneret plate used by the technology. The processing technology comprises the following steps: a. high polymer melts are spouted from spray slits of each spinneret orifice on the spinneret plate via heating and pressurizing; b. the high polymer melts spouted from the spray slits of each spinneret orifice expand because of Barus effect, and are spliced one another to form the profiled fiber; and c. the processed profiled fiber is oiled. The structure of the spinneret plate is as follows: a plurality of spinneret orifices are distributed on the plate body to form a spinneret orifice array, wherein each spinneret orifice comprises at least two immediate spray slits. The profiled fiber has excellent degree of profile, good performances such as silkiness, hydroscopic property.

The invention relates to the field of fiber processing, and especially relates to a graphene polymer fiber and a preparation method thereof. The preparation method of the graphene polymer fiber comprises the following steps: spinning a graphene mixture and polymer resin mixture used as a core layer and a water-soluble polyester slice used as a skin layer to obtain a double-component composite fiber; and removing the surface water-soluble polyester from the double-component composite fiber to obtain the graphene polymer fiber. The graphene mixture and polymer resin mixture used as the core layer and the water-soluble polyester slice used as the skin layer are spun, and the skin layer is removed through a water dissolving treatment technology to prepare the high-profile degree conductive graphene fiber. The method is simple and is easy to implement; the prepared fiber has high profile degree, and has an enhanced siphon effect on sweat; and a fabric made of the fiber has the characteristics of soft, comfortable, dry and clean hand feeling, high electric conductivity, good antibiosis and bacteriostasis property, and good moisture absorption and sweat perspiration property. The fabric made of the fiber realizes multifunctional compounding of single fibers, and greatly increases the added values of products.

The invention discloses pre-oriented polyester yarns and a preparation method thereof and polyester fiber fabrics and a preparation method thereof. Cross sections of the pre-oriented polyester yarns are in shapes of split orange slices, and the pre-oriented polyester yarns are formed by combining fibers with *-shaped cross sections and fibers with orange-slice-shaped cross sections. The fibers with the *-shaped cross sections are prepared from semi-dull polyester and antibacterial masterbatches by the mass ratio of 1 to 0. 02-0.1. The fibers with the orange-slice-shaped cross sections are prepared from water-soluble polyester, wherein the water-soluble polyester accounts for, by mass, 25-75% of the mass sum of the water-soluble polyester and the semi-dull polyester. The pre-oriented polyester yarns are produced into high stretch polyester yarns through elasticity enhancing treatment, the high-profile-degree polyester fiber fabrics with *-shaped cross sections can be obtained through splitting treatment, and further multifunctional polyester fiber fabrics are obtained through silver plating treatment. The multifunctional polyester fiber fabrics have good antibacterial properties, superior radiation resistance performance, good moisture absorption and sweat releasing functions and high fiber cross section profile degree.

The invention discloses a polyester FDY filament with diamond luster and a preparation process thereof. The preparation process comprises that: according to a direct spinning FDY process route, PET fused mass is extruded and spun from spinneret orifices of a spinneret plate, cooled by lateral blow and solidified into silk; and the silk is oiled by an oiler, drawn and set, added with a main network and then wound into an FDY spinning cake, wherein the spinneret plate adopts a spinneret plate with a length-width ratio and I-shaped pores for spinning, the blade width is between 0.1 and 0.15mm, and the length-width ratio is between 17 and 20. The productivity of a single machine adopting the process is approximately doubled compared with the productivity of the single machine of a Japanese winding device with 12-end spinning, the energy consumption is reduced by 42 percent, the investment cost is greatly reduced and the economic benefit is improved; and the obtained fabric has special effect of the diamond luster, soft handfeel, and good ventilation property and moisture absorption.

Provided is a method for spinning cross-shaped multi-hole hollow short fibers with a recycle polyester bottle chip. The recycle polyester bottle chip is dried by a vacuum drum and then is subjected to melt spinning. The recycle polyester bottle chip enters a spinning box body by screw squeezing and is sprayed out from spinneret orifices of a cross-shaped multi-hole hollow spinneret plate, nascent fibers are obtained, then the processes such as cross air blow cooling forming, winding, bundling, drafting, curling, oiling, relaxation heat setting and cutting are carried out, and the cross-shaped multi-hole hollow short fibers with the fineness of 6.67-14.44 dtex are obtained. The spinneret orifices are formed in the cross-shaped multi-hole hollow spinneret plate, the spinneret orifices are distributed in an array mode, spinneret orifice inlets are guiding holes, and spinneret orifice outlets are spinneret capillary pores. A center arc hole group and four outer periphery arc hole groups are formed in the spinneret capillary pores. The four outer periphery arc hole groups and the center arc hole group form a cross-shaped structure. A spinning technology is improved, the spinneret plate is designed in an innovative mode, and the prepared cross-shaped multi-hole hollow short fibers have the advantages of being high in hollowness degree, good in rebound resilience, large in specific surface area, soft in hand feel, good in moisture absorbing and breathing performance and the like.

The invention provides a preparation method of six-leaf porous hollow staple fibers spun from renewable polyester bottle flakes. The preparation method comprises the following steps: performing melt spinning on the renewable polyester bottle flakes after vacuum drum drying, enabling the renewable polyester bottle flakes to enter a spinning box body through screw extrusion, spinning out of spinneret orifices of a six-leaf porous hollow spinneret plate to obtain nascent fibers, cooling and forming through circulating air blowing, winding, bundling, drafting, crimping, oiling, loosening and heat setting, and cutting to obtain the six-leaf porous hollow staple fibers, wherein the spinneret orifices are formed in the six-leaf porous hollow spinneret plate and are arranged in arrays; inlets of the spinneret orifices are guide holes, and outlets of the spinneret orifices are spinning capillary holes; each spinning capillary hole comprises one central arc-shaped hole group and six peripheral arc-shaped hole groups; the six peripheral arc-shaped hole groups and the central arc-shaped hole group form a six-leaf structure. Through improvement of a spinning process and innovative design of the spinneret plate, the prepared six-leaf porous hollow staple fibers have the characteristics of high hollow degree, high rebound resilience, large specific surface area, good moisture-absorbing and breathable effect and the like.

The invention relates to a manufacturing method of melt direct spinning high-performance heterotypic polyester fiber. The manufacturing method comprises the following steps of: selecting a polyester melt; spinning; performing annular blow cooling; performing oil bundling on an oil nozzle; and performing wind forming, wherein the heterotypic shape can be triangular, crossed, flat, hollow and the like. The polyester melt is the polyester melt which is formed by adding pentaerythritol in polymerization reaction; the air temperature of annular blow cooling is 18-22 DEG C; and the air pressure is 30-90 Pa. The manufacturing method has the advantages of simple production process, easy operation and capability of effectively guaranteeing high performance and high heterotypic degree of a produced product. The heterotypic polyester fiber produced according to the method has the advantages of good filament uniformity, good dyeing property and superior functional effect.

The invention discloses the production equipment of a multi-H-shaped coarse-denier porous POY filament and a manufacturing method thereof. The production equipment comprises spinning box bodies, a ring blowing cooling device, an oiling device, a spinning channel, a winding machine and a plurality of heating medium pipeline system devices used for melt conveying in a spinning process, wherein the spinning box bodies, the ring blowing cooling device, the oiling device, the spinning channel and the winding machine are successively arranged from top to bottom. The manufacturing method comprises the following steps of using the above production equipment to produce; making molten polyester melt pass through the melt pipes of the heating medium pipeline system devices to enter into each spinningbox body; after passing through a metering pump and a spinning component, extruding a nascent fiber; and passing through the ring blowing cooling device, the oiling device and the spinning channel, finally winding into a spinning cake. A temperature in the spinning box bodies can be rapidly increased, and the temperature can be accurately controlled, balanced and uniformed, product quality is ensured, energy consumption is reduced, and production efficiency and the abnormity degree of products are increased, which is good for rear channel processing.

The invention discloses a dumbbell-shaped micro-hole spinneret, which comprises a spinneret and a spinneret hole, and is characterized in that the spinneret has 12-38 spinneret holes, and the shape of the spinneret hole is dumbbell-shaped. When the spinneret holes are arranged on the spinneret plate, the angle between the similar long sides of the spinneret holes and the horizontal direction is in the range of 45°-60°. The end of the dumbbell-shaped spinneret hole adopted in the present invention can effectively solve the dead angle caused by four right angles in the production process of the existing inline micro-hole spinneret, which improves the stability of production, and the spun The fiber has the properties of high gloss and high brightness; the dumbbell-shaped structure adopted in the invention increases the irregularity of the cross-section of the fiber, and can effectively improve the product quality and production speed of flat series polyester products. The invention has the advantages of simple structure, low cost and favorable market promotion.

The invention discloses a preparation process of low-elastic composite yarns of moisture-absorption and sweat-releasing dacron. The preparation process comprises the following steps that (1) special-shaped POY raw yarns are prepared, specifically, polyester chips are subjected to pre-crystallizing and homogenizing drying to obtain PET dry chips, the PET dry chips are melted at high temperature, amelt is extruded, then melt-spinning is carried out, and solidifying and cooling are carried out to form a strand to obtain the special-shaped POY yarns; (2) special-shaped DTY yarns are prepared, specifically, the POY yarns prepared in the step (1) are subjected to thermal stretching, and then false twisting deformation is carried out to obtain the special-shaped DTY yarns; and (3) the low-elastic composite yarns of the dacron are prepared, specifically, the special-shaped POY raw yarns and the special-shaped DTY yarns are compounded by a composite yarn guide device to form composite yarns, and the composite yarns are shaped and then subjected to oiling and winding to obtain the low-elastic composite yarns of the moisture-absorption and sweat-releasing dacron. The low-elastic composite yarns of the dacron has a good moisture absorption and sweat releasing effect, the section profile degree and the strength of fibers are high, and a rich dyeing effect, better elasticity, better appearance and hand feeling can be given to the fabric.

The invention discloses a production method of super high breaking strength chinlon 66 industrial yarn. The production method comprises the steps of firstly, conducting solid-phase polymerizing tackifying on a chinlon 66 slice to obtain a high-viscosity slice; melting the obtained high-viscosity slice to obtain a melt; delivering the melt into a spinning box assembly to be filtered and measured insequence and conducting yarn jetting through a spinneret plate arranged in the assembly; cooling and forming an obtained tow, oiling the cooled tow and conducting homogenizing through an oil homogenizer; stretching to shape the homogenized tow and finally conducting winding to obtain the super high breaking strength chinlon 66 industrial yarn. The spinning box assembly comprises a sand box and aspinning assembly shell, one end of the sand box is opened, a melt inlet is formed in the middle of the other end of the sand box, and a filter screen, metal sand, a first metal fiber felt, a distributing plate, a second metal fiber felt, a first sealing ring and the spinneret plate are arranged from the melt inlet end in sequence; a second sealing ring is arranged in the melt inlet of the sand box. The chinlon 66 industrial yarn has super high breaking strength, and the strength of the chinlon 66 industrial yarn can reach 10.80 g / d or above.

The invention provides a spinneret plate which comprises a spinneret plate body and spinneret orifices distributed on the spinneret plate body. Each spinneret orifice is composed of 3-5 spinneret inner holes, the spinneret inner holes are triangular holes or trilobal holes, spinneret inner hole base angles of each spinneret hole are arranged on the same line, and a distance between two spinneret inner hole base angles of each spinneret orifice is 0.001-0.01 mm. Profiled fiber produced through the spinneret plate has the advantages of triangular fiber and cross fiber simultaneously. The produced profiled fiber is large in degree of profile, and fabric has various performance advances of being full in color, bright in gloss, good in fluffiness, moisture absorption, elasticity and feel and the like.

The invention discloses a device for manufacturing super-fine denier-dumbbell-shaped flat fibers and a manufacturing method thereof. The device includes a spinning box, a metering pump, a biphenyl evaporator and a spinning assembly; the spinning body is provided with a flux pipeline, and the lower part of the interior of the spinning box is provided with the spinning assembly; a ring blow coolingdevice is arranged below the spinning assembly, and an oiling device is arranged below the ring blow cooling device; a spinning channel is arranged below the oiling device, and a winding machine is arranged below the spinning channel; the interior of the winding machine is successively provided with a first draw-off godet, a network device, a second draw-off godet, a winding bobbin and a pressureroller. According to the device, a spinneret plate hole is designed into a dumbbell shape and used for improving the profile degree of the finished product flat-fibers; an oiling nozzle is designed into a double-arc inner-circle three-hole oiling nozzle; on the one hand, constraints on the flat fibers are strengthened, silk skipping is avoided, and the phenomena of silk misclassification and web break are prevented from happening, on the other hand, the thickness is strengthened, so that the flat fibers cannot be damaged easily.

The invention provides a method for spinning 8-shaped hollow staple fiber through regenerated polyester. The regenerated polyester is dried by a vacuum drum, then subjected to melt spinning, extrudedby a screw to enter a spinning box body and sprayed out of spinneret orifices of an 8-shaped hollow spinneret plate, and primary fiber is obtained; then, the 8-shaped hollow staple fiber is prepared through the processes of annular-blowing air-cooling forming, winding, bundling, drafting, curling, oiling, loose heat setting and cutting. The spinneret orifices are formed in the 8-shaped hollow spinneret plate and distributed in arrays, inlets of the spinneret orifices are guide holes, and outlets of the spinneret orifices are spinneret capillary holes; two symmetrical arc-shaped (C-shaped) holegroups are arranged on the spinneret capillary holes to form an 8-shaped structure. By improving the spinning process and innovatively designing the spinneret plate, the prepared 8-shaped hollow staple fiber has the advantages of being high in hollowness degree, good in warmth keeping performance, high in rebound resilience, capable of absorbing moisture and breathable.

The invention provides a production process of an ultra-soft bicomponent skin-core structure superfine fiber. The production process comprises the following steps of extruding a component A material and then enabling an extruded material to enter a skin layer spinning channel of a composite spinning box; extruding a component B material and then enabling an extruded material to enter a core layerspinning channel of the composite spinning box; performing compounding by the composite spinning box and then spraying out tows by a spinning assembly; and winding, stretching, thermally setting, cutting and packaging the tows. The component B material in the spinning assembly flows into a spinneret orifice through a core layer outlet with a cross-shaped section and is converged with the componentA material to form a bicomponent material with a skin-core structure; the bicomponent material is sprayed out through a spinneret micropore with a cross-shaped section; and the direction of a cross-shaped blade of the core layer outlet is the same as that of a cross-shaped blade of the spinneret micropore. The invention provides a production method of the special-shaped skin-core structure superfine fiber, and the production method can improve the tension, the flexibility and the water absorption capacity of the fiber.

The invention relates to a multifunctional polyester stable fiber manufacturing method with functions of flame retardance, anti-static electricity and ageing resistance. The method includes: subjecting magnesium hydroxide whiskers, zinc oxide, conductive mica powder and the like with the flame retardant and antistatic functions to grinding reaction with glycol, p-hydroxybenzoic acid and the like to obtain multifunctional flame-retardant and antistatic alcohol; mixing anti-aging material of triazine-5 light stabilizer, high-temperature oxidation inhibitor and UV(ultraviolet)-327 ultraviolet light absorber with the glycol, sodium alginate and the like to obtain composite antiager after grinding reaction; subjecting certain proportion of purified terephthalic acid with the glycol and the multifunctional flame-retardant and antistatic alcohol to mixing and multiple copolycondensation, and continuously adding the composite antiager in the late esterification reaction to obtain the reactive-type multifunctional polyester with flame-retardant, antistatic and antiaging functions. The multifunctional polyester is melt and spun into multifunctional polyester stable fiber.

The invention discloses a special-shaped polyvinyl alcohol fiber reinforced cement-based composite material and a preparation method thereof, and belongs to the technical field of cement paste materials. The composite material comprises the following raw materials: cement, quartz sand, a water reducing agent, special-shaped polyvinyl alcohol fibers and water, wherein the water-sand ratio is 1: (1.8-2.4), the water-cement ratio is (0.4-0.55): 1, the mixing amount of the water reducing agent is 0.1-0.8 wt% of that of the water, and the volume mixing amount of the special-shaped polyvinyl alcoholfibers is 0.5-3% of the total volume of the composite material. The special-shaped polyvinyl alcohol fibers are high in strength, large in special shape degree and good in special shape retention degree, and the durability and the mechanical property of the cement-based material can be effectively improved.

The invention discloses a six-blade type micro-pore spinneret plate comprising a spinneret plate and spinneret pores, wherein 30-80 six-blade type spinneret pores are arranged on the spinneret plate; the interval angle between two adjacent blades is 60 degrees; and three circles of the spinneret pores are uniformly arranged on the spinneret plate. According to the invention, each spinneret pore is of a six-blade type structure, and fiber with a six-blade type section have higher degree of profile, so that products produced by using the six-blade type micro-pore spinneret plate have good luster, fine hand feeling and high comfort, and the product quality and production speed of the products are also effectively increased; meanwhile, textiles made of the fiber produced by using the six-blade type micro-pore spinneret plate can form capillary effect on the surface of skin, have enhanced moisture absorption performance and air permeability, and have higher additional value. The six-blade type micro-pore spinneret plate is simple in structure and low in cost, thus being favorable to market popularization.

The invention discloses a five-leaf type micro-hole spinneret, which comprises a spinneret and a spinneret hole, and is characterized in that the spinneret plate has 30-40 spinneret holes, and the shape of the spinneret holes is five Leaf shape, the interval between adjacent leaves is 72°, and the spinneret holes are evenly arranged in three circles on the spinneret. The spinneret hole of the present invention adopts a pentalobe structure, and the fibers of the pentalobe section have a high degree of irregularity, which can increase the refraction surface of light, so the product produced by the present invention has good gloss and good hand feeling. It can also effectively improve the product quality and production speed of the product, and the fabric made of this fiber has enhanced moisture absorption and air permeability, and has high added value. The invention has the advantages of simple structure, low cost and favorable market promotion.

The invention provides a three-leaf flash polypropylene fiber. The flash polypropylene fiber is characterized in that: the section of the fiber is in a three-leaf shape; and a fiber forming process comprises the following steps of: adding sorbitol nucleating agent and flow aid dispersant into an isotactic polypropylene slice with melt index of 18 to 35 grams per 10 minutes in a ratio, performing high mixing and extraction melting, performing extrusion from three-leaf spinneret orifices at a low temperature, cooling and molding, stretching and sizing to obtain the polypropylene fiber with flash effect. The polypropylene fiber has obvious flash effect, large specific surface area, strong dirt absorption and soft handfeel, and the mechanical property of the polypropylene fiber is obviously improved; and industrialized production can be performed by using the conventional equipment and processes, and the polypropylene fiber has considerable economic and social benefits.

The invention discloses a fiber. The fiber consists of at least two monofilaments, wherein the section of each monofilament comprises 3 to 5 triangular sections; the bottom corners of the triangular sections are positioned on the same straight line; every two adjacent triangular sections of the section of each monofilament are connected with each other to form sawtooth-shaped monofilament. The specially-shaped fiber has the advantages of a triangular fiber and the advantages of a crossed fiber, so that the specially-shaped degree of the produced specially-shaped fiber is high; and a fabric has various performance advantages of saturated color, brightness, high bulkiness, high hygroscopicity, high elasticity, good handfeel and the like.

The invention relates to a manufacturing method of moisture-conducting and temperature-conducting wicking polyester fibers. The manufacturing method comprises the following steps that multi-arc cross-shaped spinneret orifices are adopted; wherein the multi-arc cross shape comprises four leaves, namely a leaf I, a leaf II, a leaf III and a leaf IV; the leaf I is defined by two line segments and a major arc; the two line segments are parallel to each other, the two ends of each line segment are flush, one end of each line segment is an m end, the other end of each line segment is an n end, and the m ends of the two line segments are connected through the major arc; a straight line, which passes through the circle center of the circle corresponding to the major arc and is simultaneously arranged at equal intervals with the two line segments, is taken as a line L, wherein one point, which is positioned outside the leaf I and is close to the n end, on the line L is a point O; the leaf II, the leaf III and the leaf IV are correspondingly formed by rotating the leaf I around the point O by 90 degrees, 180 degrees and 270 degrees respectively; and the technological process comprises a winding procedure. A comb-shaped filament separator is arranged in a winding machine, and the comb-shaped filament separator porcelain piece is shaped like a formula as shown in the specification. The problems that in the prior art, a large number of broken filaments and filament burrs are generated in the spinning process, and tows are prone to jumping out when passing through a comb-shaped filamentseparator porcelain piece are effectively solved.

The invention discloses a T-shaped micropore spinneret plate, comprising a spinneret plate and spinneret orifices, wherein the spinneret plate is provided with 20-30 spinneret orifices, and the spinneret orifices are T-shaped; the spinneret orifices are arranged on the spinneret plate in a way that the T-shaped transverse surfaces of the spinneret orifices are in parallel with the horizontal direction. In the invention, a conventional section shape is changed because the T-shaped spinneret orifice structure is adopted, thus the sections of fibers of produced polyester simulated filaments are enabled to be T-shaped, good moisture absorbing and sweat discharging effect is obtained, produced fiber products are obviously superior to the fiber products produced by existing various special-formed spinneret plates in rigidity, the hand feel, the blinking degree, the moisture absorbing property and the air permeability of fabrics are improved, higher additional value is achieved, and the quality and the production rate of products can be effectively improved. The T-shaped-micropore spinneret plate has the advantages of simple structure and low cost, and is beneficial to market promotion.

The invention discloses a spinneret provided with specially-shaped holes and belongs to the technical field of viscose production. The spinneret comprises flow guide channels and spinneret holes, wherein the spinneret holes are at least divided into three groups, each group of spinneret holes comprises round holes and the specially-shaped holes, and the round holes and the specially-shaped holes are distributed in a crossing manner. Compared with the spinneret in the prior art, the spinneret can distribute a spinning solution uniformly, can produce round and flat threads, is high in flexibility and improves the smoothness and the dying property of the threads.

The invention discloses a spinning assembly for production of industrial filaments used for nylon-66 air bags. The spinning assembly comprises a sand box and a spinning assembly shell, one end of thesand box is open, and a melt inlet is formed in the other end of the sand box. A filter screen, metal sand, a first metal fiber mat, a distributing plate, a second metal fiber mat, an L-shaped first seal ring and a spinneret plate are sequentially arranged in the sand box from the melt inlet end, the second metal fiber mat is compressed to the distributing plate by the first seal ring, the spinneret plate is set into a stepped shape in the axis direction, the diameter of the end, adjacent to the second fiber mat, of the spinneret plate is small, the end, adjacent to the second fiber mat, of the spinneret plate is inserted into the sand box which is inserted into the spinning assembly shell, one end of the spinning assembly shell is open, an internal thread is machined on the inner wall ofthe opening end, an annular flange with an opening in the middle is arranged at the other end of the spinning assembly shell, and the inner side end surface of the annular flange makes contact with the edge of the spinneret plate in the sand box. By means of the assembly, the quality of the industrial filaments used for the nylon-66 air bags is obviously improved, and the cost is reduced.

The invention discloses a preparation method of melt-spun profiled polyvinyl alcohol fibers, and belongs to the technical field of preparation of profiled polyvinyl alcohol fibers. The preparation method comprises the following steps of: carry out melt spinning on modified polyvinyl alcohol powder on extruding-spinning equipment, after melt extruding, filtering and metering, ejecting from a spinneret plate with profiled spinneret micropores, and carrying out blowing cooling on a melt trickle side to prepare profiled polyvinyl alcohol as-formed fibers; and after carrying out multi-stage stretching, wet heat stretching or dry heat stretching and heat setting on the profiled polyvinyl alcohol as-formed fibers, preparing the melt-spun profiled polyvinyl alcohol fibers. According to the preparation method of the melt-spun profiled polyvinyl alcohol fibers, which is disclosed by the invention, stable and continuous melt spinning on the polyvinyl alcohol fibers is implemented, the as-formed fibers of which the sections are of a triangle, three-leaf, four-leaf or flat wave shape can be obtained, the melt-spun profiled polyvinyl alcohol fibers capable of being used for a reinforced toughened composite material are successfully prepared by subsequent stretching and heat setting processes, and the melt-spun profiled polyvinyl alcohol fibers are high in strength and good in profiled shaperetention.