CN108166121A - A kind of method that down-like difficulty spins the compound resultant yarn of fiber short route - Google Patents

Abstract

The invention relates to a short-process composite yarn forming method of down-like difficult-spinning fibers, which belongs to the technical field of textiles. The present invention utilizes the feature that the down-like fiber is easy to be made into a non-woven surface material, and the non-woven surface material roll made of the down-like fiber raw material is installed on a slitting machine, and the non-woven surface material is cut into fiber strips, and then used Flyer roving frame, fiber strips and filaments are compositely twisted and wound, and directly and continuously transformed into linear cylindrical composite yarns. The composite yarn forming method of the present invention breaks the traditional technology that is difficult for down-like fibers to be combed and collected into strips The bottleneck changes the structure of the fiber strips, eliminates a series of processes such as drawing and spinning, and effectively solves the problem that down-like difficult-to-spin fibers cannot be spun into yarns. The process flow of the method of the invention is short and easy to popularize.

Description

A method for composite yarn of down-like difficult-to-spin fibers in a short process

technical field

The invention relates to a short-process composite yarn forming method of down-like difficult-spinning fibers, which belongs to the technical field of textiles.

Background technique

Textile fabrics used in clothing can be divided into three categories: woven (woven), knitted and non-woven fabrics. Woven and knitted fabrics are woven from yarns or filaments through a weaving process; non-woven fabrics (also known as non-woven fabrics) are processed from textile fibers by bonding, fusing or other mechanical and chemical methods. Woven fabric is a fabric formed by interweaving warp yarns and weft yarns perpendicularly to each other. The fabric weaves include plain weave, twill weave, satin weave and the weaves formed by the above three basic weaves and their intersecting changes. Knitted fabrics are formed by forming yarns or filaments into coils, and then interlocking the coils. Due to the coil structure of knitted fabrics, there is a large amount of yarn stored per unit length, so most of them have good elasticity. Both weaving and knitting belong to the category of traditional textile processing. Traditional textile adopts the process of spinning first and then weaving. The specific weaving steps are: loose fiber opening and impurity removal, mixing, carding, combing, one-way drawing, two-way drawing, Roving, spun yarn, winding, warping, sizing, threading and knotting, weft yarn preparation, and weaving; the specific weft knitting steps are: loose fiber opening and impurity removal, mixing, carding, combing, one-way drawing, two-way drawing Strips, roving, spun yarn, winding, heat setting, weft knitting. In traditional textile processing, there are three major technical problems: First, traditional ring spinning requires many procedures, long process, labor intensive, time-consuming and high cost to process bulk fiber into yarn. Efficient and high-quality short-process spinning is the solution to shorten the textile The basis of the process; second, the weaving preparation and weaving process after the spinning and spinning process have a long process and high operating speed, and have high requirements on the quality of the yarn such as wear resistance, strength, and hairiness. Broken needle around the crochet needle or unclear weaving opening reduces the efficiency of weft insertion, and the wear resistance and low strength of the yarn lead to high frequency of woven warp yarn breakage, low weaving efficiency, and poor quality of the final product; thirdly, although traditional ring spinning Yarn cohesion is high and the range of spinning counts is wide, but spinning is restricted by factors such as fiber length, stiffness, and number of fibers, especially if the fiber length is too short (length less than 20 mm), and the fiber transfers from inside to outside during the yarn forming process. Insufficient cohesion, low yarn strength, frequent spinning end breaks, and inability to continue spinning.

In order to solve the problem of long process flow of traditional ring spinning, various open-end high-speed spinning technologies have emerged as the times require. Vortex spinning is a new spinning method that uses a fixed vortex spinning tube to replace the high-speed rotating spinning cup, spinning spindle and traveler for spinning. Since the twisting and coagulation of machinery is replaced by eddy current without rotating parts, it has the advantages of fast speed, high output, short process flow and high production rate. However, the air-jet vortex spinning is to push the tail of the free end of the yarn through the vortex for circular high-speed rotation and twisting to form a yarn. It belongs to the non-holding spinning of the free end, which leads to insufficient holding force on the fiber during the spinning process, and low degree of internal and external transfer of the fiber. The degree of fiber cohesion is poor, and the spinning strength is low. Therefore, fibers with poor cohesion, short length, high rigidity, and bending and fluffy cannot be vortex spun into yarn. Friction spinning is a spinning method with short process flow, simple equipment, low speed and high yield. It uses the combination of machinery and air to absorb cohesive fibers. Rubbing and twisting into yarn. However, the friction spinning yarn is a yarn with a layer twist wrapping structure, lack of internal and external transfer between the internal fibers of the yarn, poor cohesion between the fibers, and low yarn strength. Therefore, when the fiber bending stiffness is high and the length is too short, dust cage twisting cannot effectively bend, wind and twist into yarn, and friction spinning becomes difficult and the yarn quality is low. The raw material used in rotor spinning is fiber thick sliver, which is different from the roving used in ring spinning. It can be directly fed into the rotor spinning machine for rotor spinning without multiple careful drafting and carding, and Rotor spinning Rotor spinning Rotor spinning twisting and winding are carried out separately, the spinning speed is not affected by the yarn package, the rotating speed of the rotor is extremely high, so the rotor spinning has the advantages of high spinning speed, high volume Large installation, low cost, and low requirements for raw materials. However, the mechanism of rotor spinning is that the fibers are overlapped at the free end of the sliver to form a yarn, which may easily cause the fibers overlapped on the outer layer of the yarn to be less controlled during the spinning process, resulting in the rotor spinning having a greater impact on the fibers. Poor forming control ability, not suitable for spinning of fibers with poor cohesion, short length, high rigidity, and bending and fluffy. To sum up, compared with the traditional ring spinning technology, each open-end spinning greatly improves the spinning speed and shortens the process by canceling the roving process; however, the open-end spinning still cannot avoid carding, combing , drawing and other traditional processes, the process is still long, and the principle of free-end yarn formation determines that the cohesion of the yarn is insufficient, the strength of the yarn is low, the cohesion is poor, the length is short, the rigidity is large, and the difficult-to-spin fibers with bending and fluffy cannot be processed. Continuous and efficient high-quality open-end spinning.

In order to solve the problem that the fiber length is too short (less than 20 mm) in the process of traditional ring spinning and open-end spinning, the internal and external transfer cohesion of the fiber is insufficient during the yarn forming process, the yarn forming strength is low, the spinning ends are frequently broken, and continuous spinning is not possible. For the technical problems of yarn, filament and short fiber composite yarn method is often used. Chinese Patent Publication No. CN101492843B, published on May 12, 2010, the name of the invention is an embedded system positioning spinning method. The embedded spinning method disclosed in the public case is to feed two filaments into the front roller at a certain distance, and the The two strands are symmetrically fed to the front roller at a certain distance, to form a composite yarn strand that is pre-wrapped with the short fiber strands on one side and then pre-wrapped with the other side. Convergence and twisting are carried out to form a composite yarn with a more complex structure; the yarn forming area of embedded spinning forms a large symmetrical acute-angled triangle yarn-forming area for the filaments, and two filaments are fed into the acute-angled triangle formed by the filaments The yarn forming area enables the filament to carry out effective automatic contact and capture winding on the short fiber strands, expands the range of spinnable fiber types and yarn counts, and realizes the smooth ring spinning of difficult-to-spin fiber strands yarn. Chinese Patent Publication No. CN103215700B, published on January 06, 2016, the name of the invention is a vortex composite spinning method for producing fancy yarns, which essentially discloses a clamping vortex spinning method for carrier filaments and short fibers The yarn can effectively capture short fibers, so that short-length fibers can be effectively spun into the yarn body, and the difficult-to-spin short fiber strands can be smoothly spun into yarns. Although the above can solve the problem that difficult-to-spin fibers cannot be spun into yarns to a certain extent, the above-mentioned technologies have not been adopted on a large scale. It is difficult to produce fiber strips or rovings from difficult-spinning raw materials such as high-resilience super-fluffy fibers and powdery materials. It can be seen that it is very difficult to directly make ultra-short fibers, high-rigidity brittle fibers, high-resilience ultra-fluffy fibers, powdery materials and other difficult-spinning raw materials into cylindrical cohesive linear bodies arranged longitudinally and orderly, so short The process produces continuous linear bodies of difficult-to-spin raw materials such as ultra-short fibers, high-stiffness brittle fibers, high-resilience ultra-fluffy fibers, and powdery materials, which are used in spinning systems that efficiently clamp embedded fibers. Yarn key.

Non-woven fabrics no longer require spinning and weaving processes, only fibers or filaments are oriented or randomly arranged to form a web structure, and then reinforced by mechanical, thermal bonding or chemical methods to form non-woven fabrics; Compared with the traditional textile processing in which the yarns of the roots are interwoven and knitted together to form a fabric, nonwovens are usually completed in one step (such as using polypropylene pellets as raw materials, through high-temperature melting, spinning, laying, hot-rolling Continuous one-step production of polypropylene non-woven fabrics), breaking through the traditional textile principles, has the advantages of short process flow, fast production rate, high output, low cost, wide application, and multiple sources of raw materials. According to different key nonwoven technology methods, it is mainly divided into: spunlace method, acupuncture method, meltblown method, spunbond method, hot rolling bonding method, stitch bonding method, composite method, etc. The spunlace method is to spray high-pressure fine water onto one or more layers of fiber nets, so that the fibers are entangled with each other, so that the fiber nets can be reinforced and have a certain strength. According to the different quality requirements of the processed products, it can be divided into two types: Process route: A. Fiber raw material→opening and mixing→carding→web laying→drawing→pre-wetting (water treatment cycle)→front and back spunlace (water treatment cycle)→finishing→drying→winding; B. fiber Raw materials→opening and mixing→combing into a messy web→pre-wetting (water treatment cycle)→front and back spunlace (water treatment cycle)→finishing→drying→winding. Process A can better adjust the longitudinal and lateral strength ratio of the fiber web, and is suitable for the production of spunlace synthetic leather base fabric; process B is suitable for the production of spunlace sanitary materials. The acupuncture method is a kind of dry non-woven forming, which uses the puncture effect of a needle to reinforce the fluffy fiber web into a cloth. The meltblown method is one of the polymer extrusion non-woven processes. The process is to use high-speed hot air to draw the polymer melt stream extruded from the spinneret hole of the die head to form ultra-fine fibers. And condense on the condensed net curtain or roller, and rely on self-bonding to form a non-woven fabric. The specific process is: polymer feeding-melt extrusion-fiber formation-fiber cooling-netting-reinforcement into cloth. The spunbond method is also a melt-spun web-forming method, which belongs to the one-step non-woven technology. It uses the method of chemical fiber spinning. The filaments are cooled, so that the filaments are subjected to stretching airflow during the cooling process to form continuous filaments, which are then formed into a net on the condensed net curtain and laid on the net-forming curtain, and then processed by a consolidation device to form a spunbond French nonwovens. In order to achieve multi-component and various composite properties of non-woven fabrics, composite non-woven technologies are often used, such as: SM, SMS, SMSMS, CS, CSC and other composite forms (S stands for spun-bonded non-woven, M stands for melt-blown method Non-woven, C stands for thermal calender bonding non-woven). With the continuous development of fiber materials in various fields of application technology, nanofiber materials have become a hot topic in research and functional applications. The diameter of nanofibers is in the range of 1nm-100nm, which has the advantages of high porosity, large specific surface area, large aspect ratio, high surface energy and high activity, and has excellent functions such as reinforcement, antibacterial, water repellency, and filtration. It is used in Separation and filtration, biomedicine, energy materials, polymer reinforcement, photoelectric sensing and other fields. With the expansion and demand of nanofiber application fields, the forming and preparation technology of nanofibers has also been further developed and innovated; so far, the preparation methods of nanofibers mainly include chemical methods, phase separation methods, self-assembly methods and spinning processing law etc. The spinning processing method is considered to be the most promising method for large-scale preparation of polymer nanofibers, mainly including electrospinning, two-component composite spinning, melt blown and laser stretching. Among them, the laser ultrasonic stretching method uses laser irradiation to heat the fiber and stretches it under ultrasonic conditions at the same time, resulting in a stretching ratio of about 105 times to prepare nanofibers, which belongs to a conventional filament post-processing method. ; In addition, other nano-spinning methods also directly involve the spinneret, and the common point is that the fiber diameter reaches the nanometer scale by using the co-drawing effect of the spinneret. The invention patent "multi-responsive controllable filtration electrospun nanofiber membrane and its preparation method" published by the China Intellectual Property Office on November 11, 2016, the patent application number ZL201611005678.4, the application public case provides a temperature-sensitive A method in which a polymer solution with property and pH responsiveness is placed into an electrospinning apparatus, and sprayed and deposited by the electrospinning apparatus to form a nanofiber film. The key problem of electrospinning is that electrospinning belongs to non-active holding and drawing spinning. The electrostatic jet forms a Taylor cone during the filamentation process. It is difficult to effectively draw the jet fiber at a high power. Insufficient drafting leads to large molecules in the nanofibers. The degree of alignment is poor, the fineness of nanofibers needs to be further refined, the strength is too low and the size needs to be further refined; in addition, the filament formation process of Taylor cone shape makes it impossible for the fibers obtained by electrospinning to be arranged longitudinally and orderly, making it difficult to spun The fibers are collected and gathered linearly and are mainly used in the production of nanofibrous membrane materials. The invention patent "a coaxial centrifugal spinning device and method" published by the China Intellectual Property Office on August 29, 2016, with the patent application number ZL201610753443.7, provides a coaxial centrifuge tube with an inner and outer Multi-layer needles to achieve high-speed rotating coaxial centrifuge tubes for large-scale production of ultrafine fibers and even nanofibers; the invention patent "a titanium dioxide/polyvinylidene fluoride Ethylene micro/nano fiber membrane and its centrifugal spinning preparation method", patent application number ZL201611154055.3, the application provides a kind of self-made anatase TiO2 mixed with polyvinylidene fluoride (PVDF) The centrifugal spinning solution is centrifugally spun on a centrifugal spinning machine to form a micro-nano fiber membrane. The key problem of centrifugal spinning is that through high-speed spinning and centrifugal action, the sprayed jet filaments are laid in a circular shape accordingly, and it is difficult to arrange the spun fibers longitudinally and orderly, and linearly collect and gather them. It is mainly used for Production of nanofiber membrane materials; in the process of centrifugal spinning, it also belongs to non-active holding and stretching spinning. The drafting force of centrifugal jet is restricted by factors such as speed and air resistance, resulting in insufficient drafting of spinning, which leads to nano The degree of orientation of macromolecules in the fiber is poor, the fineness of nanofibers needs to be further refined, the strength is too low and the scale needs to be further refined. However, the diameter of nanofibers is too small, resulting in low absolute strength of nanofibers, easy to wear, easy to wear and fall off when coated on the surface of the fabric, and poor durability of coated textile products, resulting in only a small amount of nanofibers being laid and processed into nanofiber membranes , but cannot be conventionally drawn and twisted into yarn, which seriously restricts the industrial application of nanofibers. If nanofibers are processed into macroscopic materials, modern textile methods can be used to produce various functional medical, functional clothing, industrial fabrics and other products, which will break through the performance and value of traditional textile products, and have broad application prospects. Therefore, insufficient drafting in nanospinning production leads to poor orientation of macromolecules in nanofibers, and the fineness of nanofibers needs to be further refined. Too low strength and scales need to be further refined, which leads to poor adhesion and durability. The surface of the fabric is easy to wear and fall off, and cannot be processed by conventional spinning. As a result, nanofibers can only be processed into non-woven fabrics or nano-films in industrial textile production, and cannot be processed in high-speed and short-process textiles, which seriously restricts the industrial application of nanofibers in textiles. It can be seen that the non-woven non-woven web or film forming process not only has a very short process flow, but also is particularly easy to combine various ultra-short fibers, high-stiffness brittle fibers, high-resilience ultra-fluffy fibers, powdery materials and other difficult-to-spin raw materials. Difficult-to-spin raw materials are made into planar or sheet-like aggregates that meet the strength required for subsequent processing applications, endowing products with higher strength, bulkiness, softness, air permeability and hydrophilicity. However, nanofiber non-woven membranes and conventional fineness fiber non-woven fabrics have the following defects: 1) The strength and durability of non-woven fabrics are poor, which cannot be compared with traditional textile fabrics, and cannot be used instead of traditional textile and clothing products; It is difficult to be used for clothing fabrics as other fabrics are cleaned; 3) The fibers are arranged in a certain direction, and they are easy to split from right angles. Therefore, ultra-weak (nanofiber, etc.), ultra-short (short fleece), high-rigidity brittleness (carbon fiber, glass fiber, quartz fiber, etc.), high-resilience super-fluffy (down-like fiber), powdery (fiber whisker, Carbon nanotubes, graphene, various nano-microspheres, nanoparticles) and other difficult-to-spin materials are made into non-woven membranes or non-woven fabrics in the form of planar or sheet-like aggregates, and then the planar or sheet-like aggregates are quickly transformed into With traditional textiles, increasing the strength and durability of fabrics, while retaining the fluffy, breathable, soft, antibacterial properties of non-woven films and non-woven fabrics, is the key to solving the technical shortcomings of non-woven films and non-woven fabrics and expanding the application field of non-woven products .

Aiming at the key to this technology, Chinese Patent Publication No. CN202247124U, published on May 30, 2012, the name of the invention is a two-way covered non-woven flat strip fancy yarn, which consists of a non-woven flat The strip is used as the core yarn, and two monofilament bidirectionally cover the core yarn. The non-woven flat strip is not twisted and entwined, but the outer layer is covered with filaments. It is essentially a fancy thread, which is different from the traditional twisted entangled yarn The thread structure is very different; Chinese Patent Publication No. CN2670389Y, published on January 12, 2005, the name of the invention is a fluffy yarn made of non-woven fabric, which is a continuous flat yarn formed by longitudinal heat pressing of non-woven fabric Pressed strips, the fibers of the pressed strips tend to be arranged longitudinally, and are softened and bonded to a compact state by heat pressing, while the outer sides of the pressed strips have fluffy fibers that are not pressed. Obviously, although the yarns provided by the above two koans have a certain strong linear continuous feature, the yarn structure is flat and lacks the cylindrical structure of fiber twisting and entangling, which is very different from the structure of conventional textile yarns and is not suitable for conventional textiles. The yarn running and yarn guiding channel of textile equipment cannot really be integrated into the conventional batch yarn weaving equipment and production process, and it does not solve the problems of ultra-weak (nanofiber, etc.), ultra-short (short pile), high stiffness and brittle (carbon fiber, glass fiber) , quartz fiber, etc.), high resilience and super bulkiness (down-like fiber), powder (fiber whisker, carbon nanotube, graphene, various nano-microspheres, nanoparticles) and other difficult-to-spin materials how to spin, Due to the technical problems of weaving, ultra-short fibers are generally used in the development of papermaking, composite material reinforcement fillers, and flocking products.

Contents of the invention

In order to solve the spinning problem of difficult-to-spin materials, the purpose of the present invention is to provide a short-process composite yarn-forming method of down-like difficult-to-spin fibers. In order to achieve the above object, the technical solution of the present invention is:

A method for compounding yarns of down-like difficult-to-spin fibers in a short process, the method is carried out in the following steps:

Preparation of A fiber strips

Put the non-woven surface material roll with an area density of 10-200 g/m2 made of down-like difficult-to-spin fiber raw materials on a cutting machine equipped with a can coiling system, and cut the non-woven surface material into A fiber strip with a linear density of 40-600 g/km, each fiber strip is respectively coiled in a can to form a packaged can of the fiber strip;

B fiber strips and filament composite flyer are twisted into yarn

Place the packaged cans under the canisters of the flyer roving frame without the drafting system, at least one fiber strip drawn from the packaged cans is fed to the canister through the guide rollers on the canisters At the nip of the front roller formed by the engagement of the front roller of the wing roving frame and the front rubber roller, at least one filament unwound from the filament package is fed to the front roller clamp of the wing roving frame through the yarn guide respectively At the mouth, it merges with at least one fiber strip at the nip of the front roller, and the merged filament and fiber strip are output from the nip of the roller, and the output line speed is 10-25 m/min. The fiber strip is twisted and wound by the flyer. When the flyer is twisted, the flyer speed is 500-1400 rpm, the bobbin speed is 600-1800 rpm, and the twisting force three-dimensionally twists the fiber strip. Tape and filament, increase the cohesion between the fiber strip and the filament, the pulling force pulls the internal fiber of the fiber strip to stretch along the length direction of the strip, and strengthens the fiber orientation. After twisting and drawing, the fiber strip and the long The yarn forms a composite sliver with a fineness of 50-700 tex, and the composite sliver passes through the top hole, the side hole, the hollow arm, the pressing palm rod, and the pressing palm leaf of the rotating flyer of the flyer mechanism in turn, and is wound to the insertion Placed on the bobbin on the rotating spindle of the flyer mechanism.

Due to the adoption of the above technical scheme, compared with the prior art, a method for compounding yarns of down-like difficult-spinning fibers in a short process of the present invention has the advantage that: the present invention uses "down-like difficult-spinning fiber raw materials to make non-woven fabrics." The spun surface material roll is installed on the cutting machine, and the non-woven surface material is cut into fiber strips with a linear density of 10-200 g/km, which cleverly utilizes down-like fibers that can be randomly interspersed and bonded to form a uniform, high-strength fabric. The non-woven surface material that meets the processing needs, the non-woven surface material of the down-like fiber is directly and accurately and evenly cut into the target weight fiber strip, and a strip-shaped prepolymer is conveniently made, which is a down-like fiber aggregate Direct twisting into yarn is ready, eliminating the need for a series of processes such as multiple drafting and drawing in pre-spinning of traditional spinning, drawing and twisting of cooked sliver to make roving, which not only greatly shortens the traditional spinning process, but also breaks the When the down-like fiber is traditionally carded into a web, the fibers are easy to entangle with each other, the longitudinal order is difficult, the fiber strips are poor in uniformity and strength, and the spun yarn is extremely difficult to draw and twist into a yarn; The twisting and winding effect of the wing spindle, the three-dimensional twisting of the down-like fibers and filaments inside the fiber strips, increases the cohesion between the down-like fibers and between the down-like fibers and the filaments, and at the same time pulls the internal fibers of the fiber strips to stretch along the length of the strips. Increase fiber orientation, transform linear sheet-like fiber strips directly into linear cylindrical, high-strength filament composite yarns, change the form of down-like fibers in fiber strips that are too loose and randomly distributed, and solve the problem of twist-free Flat sliver or flat yarn has technical problems such as low fiber cohesion and difficulty in adapting to textile processing requirements. At the same time, the traditional spinning drawing, roving drafting, spun yarn drafting and twisting processes are eliminated, and the yarn forming process is further shortened. The invention adopts two steps of cutting the non-woven surface material into fiber strips, and twisting the fiber strips and filament composite flyer into yarn, which not only effectively solves the technical problem that down-like fibers are difficult to spin into yarns, but also realizes Short-process yarn forming provides a fast and effective method for making high-function and high-quality yarns and clothing fabrics from down-like difficult-to-spin fibers. The yarn forming method of the invention has obvious advantages, short process, and is easy to popularize and apply in a large area.

Description of drawings

Fig. 1 is the composite yarn forming flowchart of the present invention.

Fig. 2 is a schematic diagram of composite twisted yarn in Example 1 of the present invention.

Fig. 3 is a schematic diagram of compound twisted yarn in Example 2 of the present invention.

Detailed ways

A method for compounding yarns of down-like hard-spun fibers in a short process of the present invention will be described in further detail below in conjunction with the accompanying drawings.

see Attachment.

A short-process composite yarn forming method of down-like difficult-spinning fibers. In the method, firstly, the down-like difficult-spinning fiber raw materials are formed into a web according to the existing non-woven process. legal, stitch-bonding and other processes to make non-woven surface material rolls with an area density of 10-200 g/m2; and then follow the steps below:

Preparation of A fiber strips

Put the non-woven surface material roll with an area density of 10-200 g/m2 made of down-like difficult-to-spin fiber raw materials on a cutting machine equipped with a can coiling system, and cut the non-woven surface material into The fiber strips with a linear density of 40-600 g/km are ready for the down-like fiber aggregates to be directly twisted into yarns, eliminating the need for multiple drafting drawing and sliver drafting in traditional spinning A series of processes such as twisting to make roving not only greatly shorten the traditional spinning process, but also break through the traditional carding of down-like fibers, the fibers are easy to entangle with each other, the longitudinal order is difficult, the fiber strips have poor uniformity and low strength 1. The technical bottleneck of extremely difficult drafting and twisting of spun yarn; each fiber strip is placed in a can separately to form a package can of the fiber strip;

B fiber strips and filament composite flyer are twisted into yarn

Place the packaged cans under the canisters of the flyer roving frame without the drafting system, at least one fiber strip drawn from the packaged cans is fed to the canister through the guide rollers on the canisters At the nip of the front roller formed by the engagement of the front roller of the wing roving frame and the front rubber roller, at least one filament unwound from the filament package is fed to the front roller clamp of the wing roving frame through the yarn guide respectively At the mouth, it merges with at least one fiber strip at the nip of the front roller, and the merged filament and fiber strip are output from the nip of the roller, and the output line speed is 10-25 m/min. The fiber strip is twisted and wound by the flyer. When the flyer is twisted, the flyer speed is 500-1400 rpm, the bobbin speed is 600-1800 rpm, and the twisting force three-dimensionally twists the fiber strip. Tape and filament, increase the cohesion between the fiber strip and the filament, the pulling force pulls the internal fiber of the fiber strip to stretch along the length direction of the strip, and strengthens the fiber orientation. After twisting and drawing, the fiber strip and the long The yarn forms a composite sliver with a fineness of 50-700 tex, which changes the loose and random distribution of down-like fibers in the fiber strip, and solves the problem of small fiber cohesion and difficulty in untwisted flat sliver or flat yarn. Adapt to technical issues such as textile processing requirements, while eliminating the need for traditional spinning drawing, roving drafting, spun yarn drafting and twisting processes, further shortening the yarn forming process and improving yarn forming efficiency; the composite yarn is rotated by the wing spindle mechanism in turn The top hole, the side hole, the hollow arm, the pressing palm rod, and the pressing palm leaf of the flyer are wound onto the bobbin inserted on the rotating spindle bar of the flyer mechanism.

The specific application of the present invention will be further described in detail below in conjunction with the specific short-process composite yarn-forming method of down-like difficult-spinning fibers.

Embodiment 1 adopts duck down and polypropylene fiber to carry out composite yarn in a short process.

Duck down is a kind of down, which belongs to animal protein fiber. The eiderdown quilt has high warmth retention, strong elasticity, high bulkiness, and has the characteristics of lightness, softness and softness. Tested with duck down with a down content of 50%, its lightness and bulkiness is equivalent to 2.8 times that of cotton and 2.2 times that of wool. For the same volume of natural down quilts, the weight of the down quilt is the lightest, about 1/3 of the cotton quilt, and 1/2 of the wool silk quilt, so the down quilt is not only soft and warm, but also feels good to the skin. However, duck down is not a single-fiber structure, but mostly in the shape of down and down, so it is difficult to arrange longitudinally and orderly, and form fiber strips for twisting into yarn, resulting in great limitations in its application in textiles. Therefore, firstly, the duck down fiber and polypropylene fiber are mixed and carded in a ratio of 85/15, laid, needle-punched, thermally bonded and cured to reinforce the fiber web, and a non-woven surface material roll with an area density of 200 grams per square meter is obtained. dress; then adopt the present invention to carry out short-flow composite yarn, concrete steps are:

Preparation of A fiber strips

The non-woven surface material rolls made of duck down raw materials with a surface density of 200 g/m2 are placed on a cutting machine with a can coiling system, the cutting speed is 90 m/min, and the cutting width is 3.0 mm. The non-woven surface material is cut into linear sheet-like fiber strips with a linear density of 600 g/km, which is ready for the direct twisting of duck down aggregates into yarns, eliminating the need for multiple drafting and A series of processes such as drafting and twisting of sliver and cooked sliver to make roving, not only greatly shorten the traditional spinning process, but also break through the traditional carding of duck down fiber into a web, the duck down is easy to entangle with each other, the longitudinal order is difficult, and the duck down fiber strips Poor uniformity and low strength, and extremely difficult technical bottlenecks of spun yarn drafting and twisting into yarn; each fiber strip is individually coiled in a can to form a package can for the fiber strip;

B fiber strips and filament composite flyer are twisted into yarn

Place the packaged cans under the guide frame of the HY492A flyer roving frame that has canceled the drafting system, and the filament rolls are installed on the bobbin support frame of the HY492A flyer roving frame; The fiber strips drawn from the drum are fed to the nip of the front rollers formed by the engagement of the front rollers and the front rubber rollers of the flyer roving frame through the guide rollers on the creel, and one fiber strip unwound from the filament package 1 piece of polypropylene filament, the filament specification is 40D/12F, the polypropylene filament is fed to the front roller nip of the wing roving frame through the yarn guide in turn, and merges with at least one fiber strip at the front roller nip , the merged filaments and fiber strips are output from the roller jaws, the output line speed is 25 m/min, and the filaments are located in the middle of the fiber strips (see accompanying drawing 2), and the long filaments and fiber strips after output are subjected to wing Spindle twisting and winding pulling effect, when the wing spindle is twisting, the flyer speed is 500 rpm, the bobbin speed is 600 rpm, the twisting force three-dimensionally twists the fiber strips and filaments, and increases the fiber strips Cohesion with the filaments, where the filaments are located in the yarn core, and the fiber strips are wrapped around the outer layer of the filaments to form a filament-cored composite structure, and the pulling force pulls the internal fibers of the fiber strips to stretch along the length of the strips , Reinforced fiber orientation, the fiber strips and filaments after twisting and drawing form a linear cylindrical composite yarn with a fineness of 700 tex, which changes the loose and random distribution of down-like fibers in the fiber strips , which solves the technical problems such as low fiber cohesion in flat sliver or flat yarn and difficulty in adapting to textile processing requirements. At the same time, the traditional spinning drawing, roving drafting, spun yarn drafting and twisting processes are eliminated, and the cost is further shortened. Yarn process, improve yarn forming efficiency. The composite yarn passes through the top hole, the side hole, the hollow arm, the pressing palm rod and the pressing palm leaf of the rotating flyer of the flyer mechanism in turn, and is wound onto the bobbin inserted on the rotating spindle rod of the flyer mechanism.

Embodiment 2 adopts down cotton fiber to carry out short-process composite yarn.

Down cotton is made of different specifications of superfine fibers and down through special processes. Because it is similar to down, it is called down cotton, and most of it is called silk cotton or hollow cotton. The product is light and thin, delicate, soft, It has good heat preservation, is not easy to deform, and does not show through the silk. Its thermal performance exceeds that of down of the same grammage. It can be widely used in down padded jackets, ski jackets, cold-proof clothing, down quilts, down cotton trousers, car seat cushions and other thermal products. There are two types of down cotton: one is carded and formed, which feels similar to DuPont cotton, also known as imitation goose down cotton; the second is unformed, similar to PP cotton, which feels close to down and is an ideal substitute for down . The shape and structure of down cotton is similar to that of down. It is a fiber with high fluffiness and is difficult to cohere. It is difficult to use traditional textile processes to form sliver and spin yarn. Polypropylene filaments arranged parallel to each other with a spacing of 2 mm, the specification of polypropylene filaments is 15D/6F, and the polypropylene filaments are hot-melt bonded to the fiber net to obtain a surface density of 10 grams per square meter made of down cotton fiber raw materials The enhanced non-woven surface material package; then use the present invention to carry out short-process composite yarn, the specific steps are:

Preparation of A fiber strips

The non-woven surface material package made of down cotton raw material with an area density of 10 g/m2 is placed on a cutting machine equipped with a can coiling system, the cutting speed is 110 m/min, and the cutting width is 4.0 mm The non-woven surface material is cut into linear sheet-like fiber strips with a linear density of 40 g/km, which is ready for direct twisting of down cotton fiber aggregates into yarns, eliminating the need for multiple times of pre-spinning in traditional spinning A series of processes such as drafting and drawing, drawing and twisting of cooked sliver to make roving, not only greatly shorten the traditional spinning process, but also break through the traditional carding process of down cotton fibers, the soft down cotton is easy to entangle with each other and the longitudinal order Difficult arrangement, poor uniformity and low strength of down cotton fiber strips, and difficulty in drafting and twisting the spun yarn into yarns.

B fiber strips and water-soluble vinylon filament composite flyer twisted into yarn

Place the packaged cans under the guide frame of the HY492A flyer roving frame that has canceled the drafting system, and the filament rolls are installed on the bobbin support frame of the HY492A flyer roving frame; The fiber strips drawn from the drum are fed to the nip of the front roller formed by the engagement of the front roller and the front rubber roller of the flyer roving frame through the guide roller on the guide creel, and the 20 denier unwound from the filament package The vinylon filament is fed to the front roller nip of the wing roving frame through the yarn guide, and merges with the two fiber strips at the front roller nip, and the merged filament and fiber strips are output from the front roller nip. The output line speed is 10 m/min, and the two filaments are respectively located on the outside of the two fiber strips (see accompanying drawing 3), forming an arrangement form of embedded spinning components. Twisting and winding pulling effect, when the flyer is twisting, the flyer speed is 1400 rpm, the bobbin speed is 1800 rpm, the twisting force of the flyer three-dimensionally twists the ultra-short fiber inside the right fiber strip and the right The side filaments increase the cohesion between the down cotton fibers and the down cotton fibers and the right side filaments, and the force of bobbin winding pulls the inner fibers of the right side fiber strips to stretch along the length direction of the strips, increasing the fiber orientation to form the right side Twisted composite yarn; due to the symmetrical characteristics of the embedded spinning area, the twisting force of the flyer three-dimensionally reverses the ultra-short fibers inside the left fiber strip and the left filaments, increasing the length between the down cotton fibers and the length between the down cotton fibers and the left side. Inter-filament cohesion, bobbin winding force pulls the internal fibers of the left fiber strip to stretch along the length of the strip, increasing fiber orientation, forming a left pre-twisted composite yarn, which is merged with the right pre-twisted composite yarn again Twist to form a linear cylindrical composite yarn with a fineness of 50 tex, which changes the loose and random distribution of down-like fibers in the fiber strips, and solves the problem of small fiber cohesion in untwisted flat strips or flat yarns , It is difficult to adapt to the technical problems such as textile processing requirements, and at the same time, the traditional spinning drawing, roving drafting, spun yarn drafting and twisting processes are eliminated, the yarn forming process is further shortened, and the yarn forming efficiency is improved. The composite yarn passes through the top hole, the side hole, the hollow arm, the pressing palm rod and the pressing palm leaf of the rotating flyer of the flyer mechanism in turn, and is wound onto the bobbin inserted on the rotating spindle rod of the flyer mechanism.

Claims (1)

1. a kind of down-like difficult-spinning fiber short process composite yarn-forming method, it is characterized in that, described method is carried out according to the following steps: Preparation of A fiber strips Put the non-woven surface material roll with an area density of 10-200 g/m2 made of down-like difficult-to-spin fiber raw materials on a cutting machine equipped with a can coiling system, and cut the non-woven surface material into A fiber strip with a linear density of 40-600 g/km, each fiber strip is respectively coiled in a can to form a packaged can of the fiber strip; B fiber strips and filament composite flyer are twisted into yarn Place the packaged cans under the canisters of the flyer roving frame without the drafting system, at least one fiber strip drawn from the packaged cans is fed to the canister through the guide rollers on the canisters At the nip of the front roller formed by the engagement of the front roller of the wing roving frame and the front rubber roller, at least one filament unwound from the filament package is fed to the front roller clamp of the wing roving frame through the yarn guide respectively At the mouth, it merges with at least one fiber strip at the nip of the front roller, and the merged filament and fiber strip are output from the nip of the roller, and the output line speed is 10-25 m/min. The fiber strip is twisted and wound by the flyer. When the flyer is twisted, the flyer speed is 500-1400 rpm, the bobbin speed is 600-1800 rpm, and the twisting force three-dimensionally twists the fiber strip. Tape and filament, increase the cohesion between the fiber strip and the filament, the pulling force pulls the internal fiber of the fiber strip to stretch along the length direction of the strip, and strengthens the fiber orientation. After twisting and drawing, the fiber strip and the long The yarn forms a composite sliver with a fineness of 50-700 tex, and the composite sliver passes through the top hole, the side hole, the hollow arm, the pressing palm rod, and the pressing palm leaf of the rotating flyer of the flyer mechanism in turn, and is wound to the insertion Placed on the bobbin on the rotating spindle of the flyer mechanism.