CN110528133B - Preparation method and device of elastic loop composite yarn with wrapping structure - Google Patents
Preparation method and device of elastic loop composite yarn with wrapping structure Download PDFInfo
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- CN110528133B CN110528133B CN201910863545.8A CN201910863545A CN110528133B CN 110528133 B CN110528133 B CN 110528133B CN 201910863545 A CN201910863545 A CN 201910863545A CN 110528133 B CN110528133 B CN 110528133B
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
- D02G3/322—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic using hollow spindles
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
- D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/34—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns
- D02G3/343—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns using hollow spindles
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/34—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns
- D02G3/346—Yarns or threads having slubs, knops, spirals, loops, tufts, or other irregular or decorative effects, i.e. effect yarns with coloured effects, i.e. by differential dyeing process
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/38—Threads in which fibres, filaments, or yarns are wound with other yarns or filaments, e.g. wrap yarns, i.e. strands of filaments or staple fibres are wrapped by a helically wound binder yarn
- D02G3/385—Threads in which fibres, filaments, or yarns are wound with other yarns or filaments, e.g. wrap yarns, i.e. strands of filaments or staple fibres are wrapped by a helically wound binder yarn using hollow spindles, e.g. making coverspun yarns
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- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention discloses a preparation method and a device of a wrapping structure elastic loop composite yarn, and relates to the field of composite yarn processing. According to the invention, the elastic yarn and the non-elastic yarn in a drafting state are combined to form the elastic/non-elastic double-core yarn, the wrapping yarn is wrapped to form the wrapping structure composite yarn, finally, the stretching force on the elastic yarn in the wrapping structure composite yarn is relieved, so that the elastic yarn in the wrapping structure composite yarn is elastically retracted to a non-drafting state, the non-elastic yarn is compressed and bent in the yarn axis direction due to the elastic retraction effect of the elastic yarn, and then a yarn loop is formed by protruding between the wrapping yarn and the spiral, and the wrapping structure elastic loop composite yarn is prepared. The elastic loop composite yarn with the wrapping structure is wound and stored for later use in the form of the composite yarn with the wrapping structure before a yarn loop is formed, and is unwound to form the yarn loop when in use, so that the quality of the yarn loop after the loop composite yarn is stored and conveyed for a long time is not influenced, and the subsequent application of the loop composite yarn is facilitated.
Description
Technical Field
The invention relates to the field of composite yarn processing, in particular to a preparation method and a device of elastic loop composite yarn with a wrapping structure.
Background
The hollow spindle wrapping spinning is a technology for specially producing composite yarns with a wrapping structure, and the technical core of the hollow spindle wrapping spinning is a hollow spindle wrapping technology, namely, one yarn is spirally wound on the other yarn and/or fiber strips to form the composite yarn with the wrapping structure. At present, the hollow spindle wrapping technology is applied to spinning equipment such as parallel spinning machines, hollow spindle fancy twisting machines, hollow spindle wrapping machines and the like.
The loop yarn is generally used for knitting the knitted sweater, and the yarn loops are distributed on the surface of the sweater, so that the contact flexibility and the heat retention of the sweater can be greatly improved, and the loop yarn is a main fancy yarn for knitting the sweater at present. The prior loop yarn is mainly spun by a hollow spindle fancy twisting machine, a yarn loop is formed by overfeeding of fiber strands drafted by a drafting device, and fixed yarn is fixed on core yarn to form composite yarn, so that the loop yarn is prepared.
In the process of implementing the invention, the inventor finds that the related art has at least the following problems:
in the existing preparation method of the loop yarn, the formation of the yarn loops in the loop yarn is realized through overfeeding, the yarn loops mainly comprise short fiber strands instead of complete yarn, the structure of the yarn loops is unstable and easy to damage, and each yarn loop is easy to deform, wind and even break due to extrusion in the subsequent winding, transportation and storage processes of the prepared loop yarn, so that the subsequent use of the loop yarn is influenced.
Disclosure of Invention
In order to solve the above problems in the related art, the present invention provides a method and an apparatus for manufacturing an elastic terry composite yarn of a wrapping structure, in which an elastic yarn and a non-elastic yarn in a drafted state are combined to form an elastic/inelastic dual-core yarn, the wrapped yarn is wrapped to form the wrapping structure composite yarn, and finally, a stretching force applied to the elastic yarn in the wrapping structure composite yarn is released, so that the elastic yarn in the wrapping structure composite yarn is elastically retracted to an undrawn state, the non-elastic yarn is compressed and bent in a yarn axis direction due to the elastic retraction of the elastic yarn, and then, a yarn loop is formed by protruding threads of the wrapped yarn in the wrapping structure composite yarn, thereby manufacturing the elastic terry composite yarn of the wrapping structure.
According to a first aspect of embodiments of the present invention, there is provided a method of preparing a wrap-structured stretch loop composite yarn, the method comprising:
continuously applying a drafting force with a preset drafting multiple to the elastic yarn to enable the elastic yarn to be in a drafting state;
combining a non-elastic yarn with the elastic yarn in a drafting state to form an elastic/non-elastic double-core yarn;
wrapping the outer wrapping yarn on the surface of the elastic/inelastic double-core yarn in a spiral shape to form a wrapping structure composite yarn;
and withdrawing the stretching force of the elastic yarn in the wrapping structure composite yarn, so that the elastic yarn in the wrapping structure composite yarn elastically retracts to be in an undrawn state, the non-elastic yarn in the wrapping structure composite yarn is compressed and bent in the yarn axis direction due to the elastic retraction effect of the elastic yarn, and then the spirals of the outer wrapping yarn in the wrapping structure composite yarn are raised to form a yarn loop, so that the wrapping structure elastic loop composite yarn is prepared.
In a preferred embodiment, the pitches of the individual spirals of the outer wrapping yarn in the wrapping-structured composite yarn are varied according to a predetermined law.
In a preferred embodiment, the continuously applying the stretching force with the preset stretching multiple to the elastic yarn to make the elastic yarn in the stretching state includes:
the elastic yarn is unwound from a first core yarn barrel under the friction transmission action of a feeding roller and then bypasses a yarn guide roller, the feeding roller and the yarn guide roller are transmitted through a chain transmission system, the surface linear velocity of the yarn guide roller is greater than that of the feeding roller, and therefore the stretching force with the preset stretching multiple is applied to the elastic yarn between the yarn guide roller and the feeding roller, and the elastic yarn is in a stretching state.
In a preferred embodiment, said combining a non-elastic yarn with said elastic yarn under drafting to form an elastic/non-elastic dual core yarn comprises:
unwinding at least one non-elastic yarn from a second core yarn drum in a passive feeding mode, enabling the non-elastic yarn to pass through a yarn guide hook, applying tension through a spring type tensioner, and feeding a central pipe of the hollow spindle from the lower end;
after the elastic yarn in the drafting state bypasses a yarn guide roller, feeding the elastic yarn into a central tube of the hollow spindle from the lower end, and enabling the non-elastic yarn and the elastic yarn in the drafting state to be combined in the central tube to form elastic/non-elastic double-core yarn;
after passing the elastic/inelastic double-core yarn through the central tube, the elastic/inelastic double-core yarn is fed into a converging yarn guide hook under the guidance of a yarn guide roller.
In a preferred embodiment, the spirally wrapping the outer wrapping yarn on the surface of the elastic/inelastic dual-core yarn to form a composite yarn with a wrapped structure, includes:
starting a power supply of the hollow ingot to enable the hollow ingot to rotate at a high speed;
the outer wrapping yarn wound on the aluminum spindle pipe unwinds along with the rotation of the hollow spindle, converges with the elastic/inelastic dual-core yarn at the converging yarn guide hook, and is spirally wrapped on the surface of the elastic/inelastic dual-core yarn to form a wrapping structure composite yarn;
and leading the wrapping structure composite yarn out by a yarn guide roller, then bypassing a yarn guide rod, guiding the yarn guide rod by a yarn guide porcelain eye on a horizontal movable yarn guide, and winding the yarn guide rod to a bobbin in friction transmission by a winding roller, wherein the ratio of the surface linear speed of the winding roller to the surface linear speed of the yarn guide roller is 0.5-0.7.
In a preferred embodiment, the elastic yarn comprises transparent spandex monofilament, the linear density of the elastic yarn is 70D-250D, the draft multiple of the elastic yarn is 2.5-5 times, and the wrapping twist of the outer wrapping yarn is 400-600 twists/m.
In a preferred embodiment, the number of the non-elastic yarns is at least two, and the colors of the non-elastic yarns are different; the color of the non-elastic yarn is different from the color of the outer wrapping yarn.
According to a second aspect of the embodiments of the present invention, there is provided a manufacturing apparatus of a wrap-structured stretch loop composite yarn, the apparatus including a first yarn guiding module, a second yarn guiding module, a union wrap module, and a yarn forming winding module;
the first yarn guiding module comprises a first core yarn barrel, elastic yarns are wound on the first core yarn barrel, the first core yarn barrel is in friction transmission connection with a feeding roller, a yarn guiding roller is arranged on one side of the first core yarn barrel in the rotating direction, and the feeding roller and the yarn guiding roller are used for applying a drafting force with a preset drafting multiple on the elastic yarns to enable the elastic yarns to be in a drafting state;
the second yarn guiding module comprises a second core yarn barrel, non-elastic yarns are wound on the second core yarn barrel, a yarn guide hook is arranged above the central line of the second core yarn barrel, and a spring type tensioner is arranged on one side of the yarn guide hook and used for applying tension to the non-elastic yarns;
the doubling and wrapping module is arranged above the first yarn guiding module and the second yarn guiding module and comprises a hollow spindle, an aluminum spindle pipe is arranged on the hollow spindle in a matched mode, an outer wrapping yarn is wound on the aluminum spindle pipe, a converging yarn guide hook is arranged above a central pipe of the hollow spindle and used for combining the elastic yarn led out by the first yarn guiding module and the non-elastic yarn led out by the second yarn guiding module to form elastic/non-elastic double-core yarn;
and a finished yarn winding module is arranged above the combined wrapping module, the finished yarn winding module sequentially comprises a yarn guide roller, a yarn guide rod, a horizontal yarn guide, a winding roller and a bobbin from bottom to top, and the winding roller is in friction transmission connection with the bobbin.
In a preferred embodiment, the linear surface speed of the yarn guide roller in the first yarn guide module is greater than the linear surface speed of the feeding roller.
In a preferred embodiment, the ratio of the surface linear speed of the winding roller to the surface linear speed of the yarn guide roller in the yarn forming winding module is 0.5-0.7.
Compared with the prior art, the elastic loop composite yarn with the wrapping structure and the processing method thereof provided by the invention have the following advantages:
the invention provides a preparation method and a device of a wrapping structure elastic ring composite yarn. The elastic loop composite yarn with the wrapping structure is wound and stored for later use in the form of the composite yarn with the wrapping structure before a yarn loop is formed, and is unwound to form the yarn loop when in use, so that the quality of the yarn loop is not influenced after the loop composite yarn is stored and conveyed for a long time, and the subsequent application of the loop composite yarn is facilitated.
Furthermore, the design of various process parameters in the preparation process, such as the linear density of the elastic yarn, the wrapping twist of the wrapped yarn, the draft multiple of the elastic yarn, the numerical range of the winding draft multiple of the wrapping structure composite yarn and the like, are obtained by a great amount of creative experimental research and tests of the inventor, so that the finally prepared wrapping structure elastic ring composite yarn has good yarn ring shape, good elastic performance and difficulty in damaging the yarn ring shape in the storage, transportation and subsequent use processes.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a process schematic illustrating a method of making a wrap-structured stretch loop composite yarn according to an exemplary embodiment.
Fig. 2 is a schematic diagram illustrating the formation of a loop in a wrap-around configuration stretch loop composite yarn according to an exemplary embodiment.
Fig. 3 is an apparatus diagram illustrating a manufacturing apparatus of a wrap-structured stretch loop composite yarn according to an exemplary embodiment.
Fig. 4 is a schematic diagram of a product of the composite yarn with a wrap structure and elastic loops according to example 1 of the present invention.
Fig. 5 is a schematic diagram of a product of the composite yarn with a wrap structure and elastic loops according to example 2 of the present invention.
Fig. 6 is a schematic diagram of a product of the composite yarn with a wrap structure and elastic loops according to example 3 of the present invention.
Fig. 7 is a schematic diagram of a product of the composite yarn with a wrap structure and elastic loops according to example 4 of the present invention.
Fig. 8 is a schematic diagram of a product of the composite yarn of the elastic loop with the wrapping structure provided in example 5 of the present invention.
Fig. 9 is a schematic view of a product of the composite yarn of the wrap structure stretch loop provided in example 6 of the present invention.
Fig. 10 is a schematic view of a product of the composite yarn of the wrap structure stretch loop provided in example 7 of the present invention.
Fig. 11 is a schematic diagram of a product of the composite yarn of the elastic loop with wrapping structure provided in example 8 of the present invention.
Fig. 12 is a schematic view of a product of the composite yarn of the wrap structure stretch loop provided in example 9 of the present invention.
Detailed Description
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a method schematic view illustrating a method of manufacturing a wrap-structured stretch loop composite yarn according to an exemplary embodiment, the method of manufacturing the wrap-structured stretch loop composite yarn, as illustrated in fig. 1, including:
step 100: continuously applying a drafting force with a preset drafting multiple to the elastic yarn to enable the elastic yarn to be in a drafting state.
In a preferred embodiment, the step 100 may include: the elastic yarn is unwound from a first core yarn barrel under the friction transmission action of a feeding roller and then bypasses a yarn guide roller, the feeding roller and the yarn guide roller are transmitted through a chain transmission system, the surface linear velocity of the yarn guide roller is greater than that of the feeding roller, and therefore the stretching force with the preset stretching multiple is applied to the elastic yarn between the yarn guide roller and the feeding roller, and the elastic yarn is in a stretching state.
In a possible implementation manner, the elastic yarn comprises transparent spandex monofilaments, the linear density of the elastic yarn is 70D-250D, the draft multiple of the elastic yarn is 2.5-5 times, and the wrapping twist of the outer wrapping yarn is 400 twists/m.
It should be noted that, in the present invention, the stretching force with the preset stretching multiple is applied to the elastic yarn between the yarn guide roller and the feeding roller, and the stretching force can be realized by matching and adjusting the linear speeds of the yarn guide roller and the feeding roller, and under the condition that other parameters are the same, the greater the stretching multiple of the elastic yarn is, the larger the size of the loop formed by the elastic loop composite yarn with the wrapping structure is, and the thicker the loop layer correspondingly formed on the surface of the fabric is.
Step 200: and combining the non-elastic yarn with the elastic yarn in the drafting state to form the elastic/non-elastic double-core yarn.
The non-elastic yarn can be a long-yarn or a short-fiber yarn such as polylactic acid yarn, pure cotton yarn and acrylic yarn.
In a preferred embodiment, step 200 may comprise:
(1) at least one non-elastic yarn is unwound from the second core yarn cylinder by adopting a negative feeding mode, passes through the yarn guide hook, is tensioned by the spring type tensioner, and is fed into the central tube of the hollow spindle from the lower end.
(2) And after the elastic yarn in the drafting state bypasses a yarn guide roller, feeding the elastic yarn into a central tube of the hollow spindle from the lower end, so that the non-elastic yarn and the elastic yarn in the drafting state are combined in the central tube to form the elastic/non-elastic double-core yarn.
(3) After passing the elastic/inelastic double-core yarn through the central tube, the elastic/inelastic double-core yarn is fed into a converging yarn guide hook under the guidance of a yarn guide roller.
It should be noted that, a certain tension is applied to the non-elastic yarn through the spring type tensioner in the unwinding and feeding process, so that the non-elastic yarn can be kept to have a certain tension degree, and the phenomenon that the non-elastic yarn and the elastic yarn in a loose state are unstable in movement due to the action of the balloon tension of the outer wrapping yarn in the subsequent outer wrapping yarn wrapping process, which affects the normal operation of wrapping and the formation of a wrapping structure is avoided. Wherein, the tension adjustment of the non-elastic core yarn is realized by the spring pressure of the clamping piece of the spring type tensioner.
Step 300: and spirally wrapping the outer wrapping yarn on the surface of the elastic/inelastic double-core yarn to form the wrapping structure composite yarn.
In a preferred embodiment, step 300 may comprise:
(1) and starting a power supply of the hollow ingot to enable the hollow ingot to rotate at a high speed.
(2) The outer wrapping yarn wound on the aluminum spindle pipe unwinds along with the rotation of the hollow spindle, converges with the elastic/inelastic dual-core yarn at the converging yarn guide hook, and is spirally wrapped on the surface of the elastic/inelastic dual-core yarn to form the wrapping structure composite yarn.
(3) And leading the wrapping structure composite yarn out by a yarn guide roller, then bypassing a yarn guide rod, guiding the yarn guide rod by a yarn guide porcelain eye on a horizontal movable yarn guide, and winding the yarn guide rod to a bobbin in friction transmission by a winding roller, wherein the ratio of the surface linear speed of the winding roller to the surface linear speed of the yarn guide roller is 0.5-0.7.
When the wrapping structure composite yarn is led out by the yarn leading roller, the elastic yarn is in a stretching state with a larger stretching multiple, if the wrapping structure composite yarn is directly wound on a bobbin at the yarn leading speed or more, the elastic force of the elastic yarn is lost along with the time effect of storage and transportation of the wrapping structure composite yarn, therefore, the invention controls the winding stretching multiple of the elastic yarn (namely the ratio of the surface linear velocity of the winding roller to the surface linear velocity of the yarn leading roller) to be 0.5-0.7 by adjusting the surface linear velocity of the winding roller, so that the wrapping structure composite yarn wound on the bobbin cannot cause molding collapse and elastic loss due to overlarge or undersize winding ratio.
Step 400: and withdrawing the stretching force of the elastic yarn in the wrapping structure composite yarn, so that the elastic yarn in the wrapping structure composite yarn elastically retracts to be in an undrawn state, the non-elastic yarn in the wrapping structure composite yarn is compressed and bent in the yarn axis direction due to the elastic retraction effect of the elastic yarn, and then the spirals of the outer wrapping yarn in the wrapping structure composite yarn are raised to form a yarn loop, so that the wrapping structure elastic loop composite yarn is prepared.
After the wrapping structure composite yarn is wound to the bobbin to form the bobbin yarn, the elastic yarn in the wrapping structure composite yarn is still in a drafting state, and yarn loops generated by the yarn body of the composite yarn are small and few, so that the phenomenon of deformation, winding or fracture is not easy to occur in the long-time storage and transportation process.
When a user needs to weave a fabric by using the wrapping structure composite yarn, the wrapping structure composite yarn can be normally unwound from the bobbin without drafting, at the moment, the elastic yarn in the wrapping structure composite yarn is elastically retracted to be in an undrawn state, the non-elastic yarn in the wrapping structure composite yarn is compressed and bent in the yarn axis direction due to the elastic retraction effect of the elastic yarn, then the spiral protrusions of the outer wrapping yarn in the wrapping structure composite yarn form yarn loops, the yarn loops gradually recover along with the elasticity of the elastic yarn to become large, and finally the wrapping structure elastic loop composite yarn is formed.
In order to illustrate the process of forming the yarn loop in the wrap-structured elastic loop composite yarn provided by the invention, a schematic diagram of the formation of the yarn loop in the wrap-structured elastic loop composite yarn shown in fig. 2 is shown, in fig. 2, a is a first stage of the formation of the yarn loop, and in the stage a, the wrap-structured elastic loop composite yarn is in a tensioned state; b is a second stage of forming the yarn loop, in the stage B, the elastic yarn in the elastic loop composite yarn of the wrapping structure retracts, and the yarn loop is gradually generated; c is a third stage of forming the yarn loop, in the C stage, the elastic yarn in the elastic loop composite yarn of the wrapping structure continuously retracts, and the yarn loop continuously increases; d is the fourth stage of the formation of the yarn loops, in the stage D, the retraction of the elastic yarn in the elastic loop composite yarn of the wrapping structure is finished, and obvious and round loop yarn can be observed.
The method is characterized in that the formation mode of the yarn loop in the existing loop yarn is mainly short fiber strand looping, the yarn loop obtained by the method is integrally formed by winding loose and staggered short fiber strands, the structure of the yarn loop is easy to be damaged by external force, and after the existing loop yarn is adopted for subsequent weaving of fabrics, the fabric is easy to influence the fabric wearability of the fabric due to the damage of the structure of the yarn loop, so that the interlocking damage of the structure of the fabric is further caused; the formation mode of the yarn loop in the wrapping structure elastic loop composite yarn provided by the invention is elastic looping, and the yarn loop obtained in the mode is integrally formed by complete yarn, so that the structure of the yarn loop is stable and is not easy to damage, the yarn loop effect can be kept for a long time in the long-term storage and use and the preparation process of subsequent products, and after the wrapping structure elastic loop composite yarn is woven by subsequent fabrics, the fabric wearability, especially the tactile comfort of the fabric is more excellent than that of the existing loop yarn fabric.
Furthermore, the loop yarn is a yarn with a large number of yarn loops distributed along the length direction, and each yarn loop on the surface of a loop yarn product prepared from the loop yarn is easily pulled by foreign objects in the use process, such as being hooked by sharp table and chair edges, being hooked by ornaments worn by a user and the like. Due to the limitation of a looping mode, the existing looped yarns in the market do not have any elastic characteristic, so that loops are more easily pulled by external force to form a broken surface in the daily use process of the existing looped yarn product, and the broken yarns are pulled away from the looped yarn product to cause the integral rejection of the looped yarn product while the appearance of the product is influenced; the elastic loop composite yarn with the wrapping structure provided by the invention adopts a unique elastic looping mode, so that the elastic loop composite yarn with the wrapping structure has certain elastic performance, and when each yarn loop on the surface of a loop yarn product woven by using the elastic loop composite yarn with the wrapping structure is hooked by a foreign object, the elastic yarn in the elastic loop composite yarn structure with the wrapping structure can generate a buffering effect, so that each yarn loop structure is prevented from being damaged.
In a preferred embodiment, the pitches of the individual spirals of the outer wrapping yarn in the wrapping-structured composite yarn are varied according to a predetermined law.
The thread pitch of each spiral of the externally wrapped yarn in the composite yarn with the wrapping structure can be adjusted through the size of the wrapping twist degree in the wrapping and winding process, wherein the wrapping twist degree is the number of turns of the externally wrapped yarn wound on the core yarn in unit length, the number is equal to the ratio of the rotating speed (r/min) of a hollow spindle to the yarn guiding speed (surface linear speed m/min), and the unit is twist/meter (T/m). When the wrapping twist is smaller, the number of turns of wrapping and winding yarns on the core yarns in unit length is small, the binding effect of the wrapping and winding yarns on the elastic/inelastic dual-core yarns is weak, the inelastic yarns are easy to bulge and loop from the larger thread pitch of the wrapping and winding yarns when the elastic yarns retract, and the composite yarns in unit length are large in looping quantity and small in loop shape; on the contrary, when the wrapping twist is larger, the number of turns of wrapping yarn wound on the core yarn in unit length is large, the pitch of the wrapping spiral is small, the wrapping yarn has strong binding effect on the elastic/inelastic double-core yarn, the inelastic yarn protrudes from the smaller pitch of the wrapping yarn when the elastic yarn retracts, looping is difficult, and the number of loops of the composite yarn in unit length is small and the loop shape is large. In the invention, the wrapping twist can be realized by adjusting the speed of the hollow spindle, and under the condition that the speeds of the feeding roller and the doffing roller are not changed, the rotating speed of the hollow spindle is higher, and the wrapping twist is higher. In one possible embodiment, the wrapping twist of the present technique is 400-600T/m.
The invention can control the pitch of each spiral of the outer wrapping yarn in the wrapping structure composite yarn to change according to a preset rule, so that the distribution of yarn loops in the finally formed wrapping structure elastic loop composite yarn is controllable.
For example, in the wrapping process, under the condition that the speeds of the feeding roller and the yarn leading roller are not changed, the speed of the hollow spindle is adjusted to change according to the periodic rotating speed of 3 times of the preset rotating speed in the first unit time and 1 time of the preset rotating speed in the second unit time, so that the twist of the outer wrapping yarn in the composite yarn of the wrapping structure is reduced by 3 times in every unit time, the pitch of the outer wrapping yarn on the body of the formed composite yarn of the wrapping structure is periodically increased in every unit time, and a yarn loop is more easily formed among the larger pitches.
In a preferred embodiment, the number of the non-elastic yarns is at least two, and the colors of the non-elastic yarns are different; the color of the non-elastic yarn is different from the color of the outer wrapping yarn.
When the number of the adopted non-elastic yarns is at least two and the colors of the non-elastic yarns are different, the surface of the prepared composite yarn of the elastic ring of the wrapping structure can form various yarn rings with different colors, after the composite yarn of the elastic ring of the wrapping structure is woven into a fabric, the surface layer of the fabric has the color mixing effect of the yarn rings with various colors, and the density of the yarn ring layer of the fabric is increased due to the increase of the number of the yarn rings, so that the thickness and the elasticity are increased. When a plurality of non-elastic yarns in the same color are adopted, the density of the yarn loop layer of the fabric can be increased, so that the thickness and the elasticity of the yarn loop layer of the fabric are increased, and yarn loops of different materials form the surface layer of the fabric, so that the wearing performance of the fabric can be compensated and optimized; when the non-elastic yarn and the outer wrapping winding yarn are different in color, the fabric of the non-elastic yarn and the outer wrapping winding yarn form a fur-like structure, namely the wool layer is formed by yarn loops, and the color is the color of the yarn loops; the cortex is formed by the yarn body, and the colour is the colour mixture of non-elasticity yarn and outsourcing winding yarn, and, when the yarn circle is relatively sparse, the colour of fabric main part also can see through the yarn circle layer and can partially appear, has increased the level of fabric apparent colour.
It should be noted that, the feeding of a plurality of non-elastic yarns can be realized by adding a feeding unit of the non-elastic yarns.
In summary, according to the preparation method of the elastic terry composite yarn with the wrapping structure provided by the invention, the elastic yarn and the non-elastic yarn in the drafting state are combined to form the elastic/non-elastic double-core yarn, the wrapping yarn is wrapped by the wrapping yarn to form the wrapping structure composite yarn, and finally the stretching force on the elastic yarn in the wrapping structure composite yarn is released, so that the elastic yarn in the wrapping structure composite yarn is elastically retracted to the non-drafting state, the non-elastic yarn is compressed and bent in the yarn axis direction due to the elastic retraction effect of the elastic yarn, and then the spiral line of the wrapping yarn in the wrapping structure composite yarn is protruded to form the terry, thereby preparing the wrapping structure elastic terry composite yarn. The elastic loop composite yarn with the wrapping structure is wound and stored for later use in the form of the composite yarn with the wrapping structure before a yarn loop is formed, and is unwound to form the yarn loop when in use, so that the quality of the yarn loop is not influenced after the loop composite yarn is stored and conveyed for a long time, and the subsequent application of the loop composite yarn is facilitated.
Furthermore, the design of various process parameters in the preparation process, such as the linear density of the elastic yarn, the wrapping twist of the wrapped yarn, the draft multiple of the elastic yarn, the numerical range of the winding draft multiple of the wrapping structure composite yarn and the like, are obtained by a great amount of creative experimental research and tests of the inventor, so that the finally prepared wrapping structure elastic ring composite yarn has good yarn ring shape, good elastic performance and difficulty in damaging the yarn ring shape in the storage, transportation and subsequent use processes.
Fig. 3 is a schematic view illustrating an apparatus for manufacturing a wrap-structured terry composite yarn according to an exemplary embodiment, the apparatus being applied to the manufacture of the wrap-structured terry composite yarn, the apparatus including a first yarn guiding module, a second yarn guiding module, a union wrapping module, and a yarn winding module;
wherein, first yarn guide module includes a first core yarn section of thick bamboo 110, it has elastic yarn to coil on the first core yarn section of thick bamboo 110, first core yarn section of thick bamboo 110 is connected with feeding roller 120 friction drive, first core yarn section of thick bamboo 110 rotation direction one side is equipped with guide roll 130, feeding roller 120 with guide roll 130 is used for right elastic yarn applys the drafting force of predetermineeing the draft multiple, makes elastic yarn is in the draft state.
The second yarn guiding module comprises a second core yarn barrel 210, non-elastic yarns are wound on the second core yarn barrel 210, a yarn guide hook 220 is arranged above the central line of the second core yarn barrel 210, a spring type tensioner 230 is arranged on one side of the yarn guide hook 220, and the spring type tensioner 230 is used for applying tension to the non-elastic yarns.
The doubling and wrapping module is arranged above the first yarn guiding module and the second yarn guiding module and comprises a hollow spindle 310, an aluminum spindle tube 320 is arranged on the hollow spindle 310 in a matched mode, an outer wrapping yarn is wound on the aluminum spindle tube 320, a converging yarn guide hook 330 is arranged above a central tube of the hollow spindle 310, and the converging yarn guide hook 330 is used for combining the elastic yarn led out by the first yarn guiding module and the non-elastic yarn led out by the second yarn guiding module to form the elastic/non-elastic double-core yarn.
A finished yarn winding module is arranged above the combined wrapping module, the finished yarn winding module sequentially comprises a yarn guiding roller 410, a yarn guiding rod 420, a horizontal moving yarn guide 430, a winding roller 440 and a bobbin 450 from bottom to top, and the winding roller 440 is in friction transmission connection with the bobbin 450.
In a preferred embodiment, the linear surface speed of the yarn guide roller 130 in the first yarn guide module is greater than the linear surface speed of the feed roller 120.
In a preferred embodiment, the ratio of the surface linear speed of the winding roller 440 to the surface linear speed of the yarn guiding roller 410 in the yarn winding module is 0.5-0.7.
In a possible embodiment, the process flow for preparing the wrap-structured stretch loop composite yarn by using the preparation device for the wrap-structured stretch loop composite yarn comprises the following steps:
the elastic yarn is unwound from the first core yarn barrel 110 through the friction transmission action of a feeding roller 120 of the first yarn guiding module, then bypasses a yarn guiding roller 130, and penetrates and wraps the central pipe of the hollow spindle 310 in the module from the lower part; meanwhile, the non-elastic yarn is unwound from the second core yarn bobbin 210 of the second yarn guiding module and passes through the yarn guide hook 220, and after tension is applied through the spring type tensioner 230, the non-elastic yarn and the elastic yarn penetrate and are combined in the central pipe of the hollow spindle 310 in the wrapping module from the lower part, so that the non-elastic yarn and the elastic yarn are combined in the central pipe to form elastic/non-elastic dual-core yarn; after passing through the central tube of the hollow spindle 310, the elastic/inelastic dual-core yarn is guided upwards by the converging yarn guide 330, and the outer wrapping yarn wound on the aluminum spindle tube 320 unwinds along with the rotation of the hollow spindle 310, converges with the elastic/inelastic dual-core yarn at the converging yarn guide 330, and is spirally wrapped on the surface of the elastic/inelastic dual-core yarn to form a wrapping structure composite yarn; after being led out by a yarn leading roller 410 of a yarn winding module, the composite yarn with the wrapping structure bypasses a yarn guide rod 420, is guided by a yarn guide porcelain eye on a horizontal movable yarn guide 430, and is wound to a bobbin 450 which is in friction transmission by a winding roller 440; when a fabric needs to be prepared, the wrapping structure composite yarn on the bobbin 450 is unwound without drafting, so that the drafting force on the elastic yarn in the wrapping structure composite yarn is relieved, the elastic yarn in the wrapping structure composite yarn is elastically retracted to be in an undrawn state, the non-elastic yarn in the wrapping structure composite yarn is compressed and bent in the yarn axis direction due to the elastic retraction effect of the elastic yarn, and then the spirals of the outer wrapping yarn in the wrapping structure composite yarn are raised to form a yarn loop, so that the wrapping structure elastic loop composite yarn is prepared.
In summary, according to the preparation device of the elastic loop composite yarn with the wrapping structure provided by the invention, the existing hollow spindle wrapping machine is improved, so that the elastic yarn and the non-elastic yarn in the drafting state are combined to form the elastic/non-elastic dual-core yarn, the wrapping yarn is wrapped by the wrapping yarn to form the wrapping structure composite yarn, finally, the stretching force on the elastic yarn in the wrapping structure composite yarn is relieved, so that the elastic yarn in the wrapping structure composite yarn is elastically retracted to the non-drafting state, the non-elastic yarn is compressed and bent in the yarn axis direction due to the elastic retraction effect of the elastic yarn, and then the yarn loops are formed by protruding among the spirals of the wrapping yarn in the wrapping structure composite yarn, so that the wrapping structure elastic loop composite yarn is prepared. The elastic loop composite yarn with the wrapping structure is wound and stored for later use in the form of the composite yarn with the wrapping structure before a yarn loop is formed, and is unwound to form the yarn loop when in use, so that the quality of the yarn loop is not influenced after the loop composite yarn is stored and conveyed for a long time, and the subsequent application of the loop composite yarn is facilitated.
To better explain the method and apparatus for preparing the composite yarn for elastic loop with wrapping structure provided by the present invention, each of examples 1 to 9 in which the composite yarn for elastic loop with wrapping structure was prepared by using the above method and apparatus for preparing the composite yarn for elastic loop with wrapping structure is shown:
example 1:
the technological parameters are as follows:
elastic yarn: the spandex elastic yarn 140D/F1 (monofilament) is transparent;
non-elastic yarn: pure cotton intrinsic white ring spun yarn 32S (english count);
wrapping yarn: polyester DTY (draw textured yarn) low stretch yarn, 70D/24F (multifilament, consisting of 24 monofilaments, total yarn density 70D), natural white;
stretch yarn draft multiple: 2.2;
wrapping twist: 468 twists per meter;
wrapping and twisting direction: s twisting;
winding draft multiple: 0.6;
the schematic diagram of the product of the prepared elastic loop composite yarn with the wrapping structure is shown in fig. 4, when the drafting multiple of the spandex elastic core yarn is small, the loop of the composite yarn is small, and the yarn loop is not obvious.
Example 2:
the technological parameters are as follows:
elastic yarn: the spandex elastic yarn 140D/F1 (monofilament) is transparent;
non-elastic yarn: pure cotton intrinsic white ring spun yarn 32S (english count);
wrapping yarn: polyester DTY (draw textured yarn) low stretch yarn, 70D/24F (multifilament, consisting of 24 monofilaments, total yarn density 70D), natural white;
stretch yarn draft multiple: 2.8 of;
wrapping twist: 468 twists per meter;
wrapping and twisting direction: s twisting;
winding draft multiple: 0.6;
fig. 5 shows a schematic diagram of a product of the elastic loop composite yarn with the wrapping structure, the difference between this embodiment and embodiment 1 is only the difference of the draft multiple of the spandex elastic yarn, and it can be seen from fig. 5 that when the draft multiple of the spandex elastic yarn is increased to 2.8, the composite yarn has a better looping effect.
Example 3:
the technological parameters are as follows:
elastic yarn: the spandex elastic yarn 140D/F1 (monofilament) is transparent;
non-elastic yarn: polylactic acid (PLA) intrinsic white ring spun 32S (english);
wrapping yarn: polyester DTY (draw textured yarn) low stretch yarn, 70D/24F (multifilament, consisting of 24 monofilaments, total yarn density 70D), black;
stretch yarn draft multiple: 2.8 of;
wrapping twist: 468 twists per meter;
wrapping and twisting direction: s twisting;
winding draft multiple: 0.6;
fig. 6 shows a schematic diagram of a product of the elastic loop composite yarn with a wrapping structure, which is different from example 2 in the types of the non-elastic yarn and the outer wrapping yarn, wherein example 2 is pure cotton intrinsic white ring spun yarn, and the example is polylactic acid intrinsic white ring spun yarn, and the linear density is the same. As can be seen from fig. 6, since the polylactic acid yarn has a greater bending stiffness than the pure cotton yarn, the roundness of the formed yarn loop is better. In the embodiment, the black outer wrapping yarn is adopted, the composite yarn ring is white, the main body is gray color of black and white mixed color, and the gray level is darker because the black outer wrapping yarn wraps the white core yarn.
Example 4:
the technological parameters are as follows:
elastic yarn: the spandex elastic yarn 140D/F1 (monofilament) is transparent;
non-elastic yarn: polylactic acid (PLA) intrinsic white ring spun 32S (english);
wrapping yarn: polyester DTY (draw textured yarn) low stretch yarn, 70D/24F (multifilament, consisting of 24 monofilaments, total yarn density 70D), black;
wrapping and twisting direction: s twisting;
stretch yarn draft multiple: 4.4;
wrapping twist: 468 twists per meter;
winding draft multiple: 0.6;
fig. 7 shows a schematic diagram of a product of the elastic loop composite yarn with the wrapping structure, which is different from example 3 in the draft multiple of the spandex elastic yarn, and it can be seen from fig. 7 that the loop size becomes larger after the draft multiple of the spandex elastic yarn is increased from 2.8 of example 3 to 4.4 of the example.
Example 5:
the technological parameters are as follows:
elastic yarn: the spandex elastic yarn 140D/F1 (monofilament) is transparent;
non-elastic yarn: acrylic fibers (30)/viscose (10)/tencel (20)/cotton (10)/bamboo viscose (30) compact sirospun yarn, 60S (English counts), black;
wrapping yarn: nylon 6 DTY (draw textured yarn) low stretch yarn, 70D/24F (multifilament, consisting of 24 monofilaments, total yarn density 70D), intrinsic white;
wrapping and twisting direction: s twisting;
stretch yarn draft multiple: 4.4;
wrapping twist: 468 twists per meter;
winding draft multiple: 0.6;
the schematic diagram of the product of the prepared elastic loop composite yarn with the wrapping structure is shown in fig. 8, the non-elastic yarn in the embodiment is black, the outer wrapping yarn is white, the yarn loop is black as shown in fig. 8, and the yarn main body is light numb gray due to the fact that the white outer wrapping yarn wraps the non-elastic yarn with a smaller winding density.
Example 6:
the technological parameters are as follows:
elastic yarn: the spandex elastic yarn 140D/F1 (monofilament) is transparent;
non-elastic yarn: cashmere yarn, 60S (english count), dark grey;
wrapping yarn: nylon 6 DTY (draw textured yarn) low stretch yarn, 70D/24F (multifilament, consisting of 24 monofilaments, total yarn density 70D), intrinsic white;
wrapping and twisting direction: s twisting;
stretch yarn draft multiple: 2.8 of;
wrapping twist: 468 twists per meter;
winding draft multiple: 0.6;
the schematic diagram of the product of the elastic loop composite yarn with the wrapping structure is shown in fig. 9, the non-elastic yarn used in the embodiment is cashmere yarn, the sweater is woven by the yarn, a loop layer formed by the cashmere yarn is in contact with the skin, and the wearing comfort of the sweater can be obtained although the cashmere yarn is used in a small amount.
Example 7:
the technological parameters are as follows:
elastic yarn: the spandex elastic yarn 140D/F1 (monofilament) is transparent;
non-elastic yarn: NSY terylene (PET) (air network yarn), 167dtex/48F, 140 nodes/m, and blue;
wrapping yarn: nylon 6 DTY (draw textured yarn) low stretch yarn, 70D/24F (multifilament, consisting of 24 monofilaments, total yarn density 70D), intrinsic white;
wrapping and twisting direction: s twisting;
stretch yarn draft multiple: 2.8 of;
wrapping twist: 468 twists per meter;
winding draft multiple: 0.5;
a schematic diagram of a product of the prepared wrapping structure elastic loop composite yarn is shown in fig. 10, in this embodiment, a polyester interlaced yarn with a royal color is used as the non-elastic yarn, a loop of the yarn shown in fig. 10 is royal color, and a yarn body is a color mixture of a white outer wrapping yarn and a royal color core yarn, and the color is lighter (the white outer wrapping yarn wraps the royal color non-elastic yarn).
Example 8:
the technological parameters are as follows:
elastic yarn: the spandex elastic yarn 140D/F1 (monofilament) is transparent;
non-elastic yarn: NSY terylene (PET) (air network yarn), 167dtex/48F, 140 nodes/m, and blue;
wrapping yarn: NSY terylene (PET) (air network yarn), 167dtex/48F, 140 nodes/m, and blue;
wrapping and twisting direction: s twisting;
stretch yarn draft multiple: 2.8 of;
wrapping twist: 468 twists per meter;
winding draft multiple: 0.5;
a schematic diagram of a product of the elastic loop composite yarn with the wrapping structure is shown in fig. 11, in this embodiment, a polyester interlaced yarn with a blue color is used as the non-elastic yarn and the wrapping yarn, and as shown in fig. 11, the loop is blue and the yarn body is also blue.
Example 9:
the technological parameters are as follows:
elastic yarn: the spandex elastic yarn 230D/F1 (monofilament) is transparent;
non-elastic yarn: NSY terylene (PET) (air network yarn), 167dtex/48F, 140 nodes/m, and blue;
non-elastic yarn 2: NSY terylene (PET) (air interlaced yarn), 167dtex/48F, 140 nodes/meter, and bright red;
wrapping yarn: terylene (PET) DTY, 75D/36F, white;
wrapping and twisting direction: s twisting;
stretch yarn draft multiple: 4.4;
wrapping twist: 468 twists per meter;
winding draft multiple: 0.6;
the schematic diagram of the product of the elastic loop composite yarn with the wrapping structure is shown in fig. 12, two non-elastic yarns are adopted for double-side feeding in the embodiment, and as can be seen from fig. 12, the looped core yarns with two colors are looped at the same position of the yarn body.
As can be clearly observed from fig. 4 to fig. 12, the yarn loop of the elastic loop composite yarn with the wrapping structure provided by the embodiment of the present invention has a good yarn loop shape, and the yarn loop structure is relatively stable and not easy to damage.
In addition, when the fabric is prepared by adopting the elastic loop composite yarn with the wrapping structure prepared by the invention, the surface layer of the fabric is covered by the loops, the structure is relatively loose, and the fabric can also have the following properties:
1) contact softness: the loose layer of yarn loops makes the skin more soft to touch. If the looped yarns are selected from yarns with better softness, the contact softness of the fabric is better.
2) The heat-moisture comfort is good. The yarn is woven into fabric with loose and porous characteristics. Besides the loose structure of the surface loop layer, the outer wrapping yarn wound in a spiral shape can be loosened and slightly fluffed due to the shrinkage of spandex, so that the inner layer structure of the fabric is loose. The loose structure not only endows the fabric with fluffy and soft comfortable touch, but also can lead the air to be easy to circulate in the fabric and be easy to radiate heat and moisture as the outer garment fabric; as an underwear material, the fabric can store more still air and has good heat retention. By reasonably selecting materials of the looped core yarn and the outer wrapping yarn and controlling the density and the size of the yarn loops, the fabric which has good comprehensive wearability and is suitable for different seasons can be prepared.
3) Color mixing and color changing appearance. When one or more colored inelastic looped core yarns are adopted, the selection of the color of the wrapping winding yarns is combined, the mixed color appearance of the yarns and the fabric thereof can be obtained, the fabric is stretched, and the mixed color effect of the looped yarns and the wrapping winding yarns can be changed due to the fact that the yarn loop part is straightened, so that the color of the fabric is changed.
The invention uses the stretched elastic yarn and the non-elastic yarn to form the multi-core yarn, and can prepare the elastic ring composite yarn with special structure and performance based on the 'shrinkage looping' yarn/yarn wrapping structure through the forward wrapping of the hollow spindle, thereby expanding the product design range of the hollow spindle-covered spinning machine. The prepared elastic loop composite yarn with the wrapping structure has elasticity and a layered structure of yarn body and yarn loop, can be used for developing elastic fabrics, and endows the fabrics with special appearance and/or wearability.
When the transparent spandex monofilament is used as the elastic yarn, the fabric woven by the elastic loop composite yarn with the wrapping structure has the advantage that as long as the elongation degree of the yarn in the fabric is smaller than the drafting multiple of the transparent spandex monofilament (the fabric rarely has the possibility of generating the elongation rate which is larger than the drafting multiple of the transparent spandex monofilament in practical use), the loops on the surface of the yarn form a loop layer with a relatively loose structure on the surface of the fabric. That is, the inelastic core yarn in spinning the yarn finally constitutes the surface yarn loop layer of the fabric, and the garment made of the fabric has a yarn loop layer in contact with the skin (the yarn is used as the loop core yarn if it is desired to contact the skin with a fiber of any composition). The technology endows the yarn and the fabric with the capability of controlling the structure, further has the capability of controlling the wearability of the fabric, and is mainly the touch comfort, such as touch softness, touch cold and warm feeling and the like. For example, if the fabric is required to have a cool touch feeling, yarns made of fiber materials (such as bamboo pulp fibers and silk fibers) having a cool touch feeling can be selected as the inelastic core yarns (looped yarns); if the fabric is required to have a warm-touch feeling, yarns made of fiber materials (such as cotton fibers and wool fibers) having a warm-touch feeling can be selected as the inelastic looped core yarns.
While the invention has been described in detail in the foregoing by way of general description, and specific embodiments and experiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings and described above, and that various modifications and changes can be made without departing from the scope thereof.
Claims (5)
1. A method of making a wrap-structured stretch loop composite yarn, the method comprising:
elastic yarns are unwound from a first core yarn barrel under the friction transmission action of a feeding roller and then bypass a yarn guide roller, the feeding roller and the yarn guide roller are transmitted through a chain transmission system, the surface linear velocity of the yarn guide roller is greater than that of the feeding roller, and therefore a stretching force with a preset stretching multiple is applied to the elastic yarns between the yarn guide roller and the feeding roller, and the elastic yarns are in a stretching state; the elastic yarn comprises transparent spandex monofilaments, the linear density of the elastic yarn is 70D-250D, the drafting multiple of the elastic yarn is 2.5-5 times, and the wrapping twist of the outer wrapping yarn is 400-600 twists/m;
unwinding at least one non-elastic yarn from a second core yarn drum in a passive feeding mode, enabling the non-elastic yarn to pass through a yarn guide hook, applying tension through a spring type tensioner, and feeding a central pipe of the hollow spindle from the lower end; after the elastic yarn in the drafting state bypasses a yarn guide roller, feeding the elastic yarn into a central tube of the hollow spindle from the lower end, and enabling the non-elastic yarn and the elastic yarn in the drafting state to be combined in the central tube to form elastic/non-elastic double-core yarn; after passing the elastic/inelastic double-core yarn through the central tube, feeding the elastic/inelastic double-core yarn into a converging yarn guide hook under the guidance of a yarn guide roller;
starting a power supply of the hollow ingot to enable the hollow ingot to rotate at a high speed, wherein an aluminum ingot pipe is matched with the hollow ingot, and an outer wrapping winding yarn is wound on the aluminum ingot pipe; the outer wrapping yarn wound on the aluminum spindle pipe unwinds along with the rotation of the hollow spindle, converges with the elastic/inelastic dual-core yarn at the converging yarn guide hook, and is spirally wrapped on the surface of the elastic/inelastic dual-core yarn to form a wrapping structure composite yarn; leading the wrapping structure composite yarn out through a yarn guide roller, then bypassing a yarn guide rod, guiding the yarn guide rod through a yarn guide porcelain eye on a horizontal movable yarn guide, and winding the yarn guide rod to a bobbin in friction transmission by a winding roller, wherein the ratio of the surface linear velocity of the winding roller to the surface linear velocity of the yarn guide roller is 0.5-0.7;
and withdrawing the stretching force of the elastic yarn in the wrapping structure composite yarn, so that the elastic yarn in the wrapping structure composite yarn elastically retracts to be in an undrawn state, the non-elastic yarn in the wrapping structure composite yarn is compressed and bent in the yarn axis direction due to the elastic retraction effect of the elastic yarn, and then the spirals of the outer wrapping yarn in the wrapping structure composite yarn are raised to form a yarn loop, so that the wrapping structure elastic loop composite yarn is prepared.
2. The method of claim 1, wherein the pitch of each helix of the outer wrapping yarn in the wrapped structured composite yarn is varied according to a predetermined law.
3. The method of claim 1, wherein the number of non-stretch yarns is at least two, each non-stretch yarn being a different color; the color of the non-elastic yarn is different from the color of the outer wrapping yarn.
4. The device for preparing the elastic loop composite yarn of the wrapping structure is characterized by comprising a first yarn guiding module, a second yarn guiding module, a combined wrapping module and a yarn forming winding module;
the first yarn guiding module comprises a first core yarn barrel, elastic yarns are wound on the first core yarn barrel, the first core yarn barrel is in friction transmission connection with a feeding roller, a yarn guiding roller is arranged on one side of the first core yarn barrel in the rotating direction, and the feeding roller and the yarn guiding roller are used for applying a drafting force with a preset drafting multiple on the elastic yarns to enable the elastic yarns to be in a drafting state;
the second yarn guiding module comprises a second core yarn barrel, non-elastic yarns are wound on the second core yarn barrel, a yarn guide hook is arranged above the central line of the second core yarn barrel, and a spring type tensioner is arranged on one side of the yarn guide hook and used for applying tension to the non-elastic yarns;
the doubling and wrapping module is arranged above the first yarn guiding module and the second yarn guiding module and comprises a hollow spindle, an aluminum spindle pipe is arranged on the hollow spindle in a matched mode, an outer wrapping yarn is wound on the aluminum spindle pipe, a converging yarn guide hook is arranged above a central pipe of the hollow spindle and used for combining the elastic yarn led out by the first yarn guiding module and the non-elastic yarn led out by the second yarn guiding module to form elastic/non-elastic double-core yarn;
a finished yarn winding module is arranged above the combined wrapping module, the finished yarn winding module sequentially comprises a yarn guide roller, a yarn guide rod, a horizontal yarn guide, a winding roller and a bobbin from bottom to top, and the winding roller is in friction transmission connection with the bobbin; and the ratio of the surface linear speed of the winding roller in the yarn forming winding module to the surface linear speed of the yarn guiding roller is 0.5-0.7.
5. The apparatus of claim 4, wherein the linear surface speed of the guide roller in the first yarn guide module is greater than the linear surface speed of the feed roller.
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| CN112813553B (en) * | 2020-12-31 | 2021-11-26 | 浙江汇纤纺织科技有限公司 | Preparation method of Sorona filament and Richcel staple fiber coated variable-twist fancy yarn |
| IT202100001811A1 (en) * | 2021-01-28 | 2022-07-28 | Paolo Benelli | NEW STRETCH FABRICS AND THEIR PRODUCTION METHOD |
| CN113638099B (en) * | 2021-08-23 | 2022-09-30 | 嘉兴学院 | Spinning method and spinning device for bunchy yarn with wrapping structure and bunchy yarn |
| EP4155443A1 (en) * | 2021-09-27 | 2023-03-29 | Calik Denim Tekstil San. Ve Tic. A.S. | Filamentary core, elastic composite yarn comprising the filamentary core, fabric comprising the filamentary core or the elastic composite yarn and method for manufacturing the filamentary core or the elastic composite yarn |
| CN115125641B (en) * | 2022-05-27 | 2023-10-17 | 鲁泰纺织股份有限公司 | Different-core wrap yarn and manufacturing method thereof |
| CN115821445A (en) * | 2022-10-13 | 2023-03-21 | 绍兴市柯桥区东纺纺织产业创新研究院 | Filament-coated slub yarn and spinning process thereof |
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