CN114990752B - Shrinkage type wool yarn coated yarn, preparation method and application thereof, fabric and preparation method - Google Patents
Shrinkage type wool yarn coated yarn, preparation method and application thereof, fabric and preparation method Download PDFInfo
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- CN114990752B CN114990752B CN202210679745.XA CN202210679745A CN114990752B CN 114990752 B CN114990752 B CN 114990752B CN 202210679745 A CN202210679745 A CN 202210679745A CN 114990752 B CN114990752 B CN 114990752B
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Classifications
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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
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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
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2211/00—Protein-based fibres, e.g. animal fibres
- D10B2211/01—Natural animal fibres, e.g. keratin fibres
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention provides a shrinkage type wool yarn coated yarn, a preparation method and application thereof, a fabric and a preparation method, and relates to the technical field of textile. The shrinkage type wool yarn cladding yarn provided by the invention comprises core yarns and outer wrapping yarns, wherein the outer wrapping yarns are high shrinkage filament yarns B, the core yarns are wool yarns or wool yarns and high shrinkage filament yarns A, and the yarn raw materials are wide in practicability. By the merging effect of the covering processing of the wool yarn and the high-shrinkage filament yarn, the yarn strength can be improved, the strength unevenness can be reduced, the yarn evenness can be improved, the weft knitting efficiency and the fabric quality can be improved when the yarn is used for fabric weaving. The shrinkage type wool yarn cladding yarn is used as a raw material, knitted fabric is firstly woven, and then high shrinkage components in the knitted fabric are shrunk through dry heat shrinkage wool shrinking treatment, so that a wool shrinking effect is realized, the surface wool layer of the prepared knitted fabric is formed by wool yarn loops and hairiness held by a cloth cover, the cloth cover is touch and comfortable, and the knitted fabric has a touch style and a visual style different from those of common knitted wool fabrics.
Description
Technical Field
The invention relates to the technical field of spinning, in particular to a shrinkage type wool yarn coated yarn, a preparation method and application thereof, a fabric and a preparation method.
Background
1. Knitted woolen fabric
The knitted woolen fabric, also called as knitted woolen fabric, is a woolen fabric which is made of weft knitted fabric woven (circular knitting) by taking worsted or semi-worsted wool yarns (wool pure yarn or blended yarn) as raw materials and is made through a fulling process and has a knitting (tatting) woolen fabric suede style. The general production process comprises the following steps:
yarn raw material, circular knitting (weft knitting), cloth turning, humidification, preshrinking, dehydration, wool shrinking, water washing, dehydration, scutching, shaping, shearing, wool steaming and coiling.
Yarn raw materials: spinning or semi-spinning wool yarns are adopted, and the blending ratio (wool content) of wool in the yarns is not lower than 50% so as to meet the requirements of wool shrinking processing; the yarn is basically colored (bulk fiber dyeing, spinning can also be wool top dyeing).
Weaving by a circular knitting machine: and (3) weaving the yarns into cylindrical knitting raw cloth by adopting a weft knitting circular knitting machine according to the designed organization and specification requirements.
Turning over: the original cloth woven by the circular knitting machine and with the front face (one face of the ring pressing ring arc) facing outwards is turned over, so that the back face (one face of the ring pressing ring arc) facing outwards is prevented from being damaged on the front face of the fabric in subsequent processing, and the quality of a finished product is prevented from being influenced.
Humidifying and preshrinking: placing the rope-shaped raw cloth after the rolling into a rotary pre-shrinking machine (called a grain shaking machine in factories), adding clear water, stirring and cleaning (the water temperature is about 50 ℃) for about 30 minutes, relaxing the internal stress of the fabric, uniformly soaking the fabric, absorbing moisture and expanding fibers in the fabric, and slightly taking out the wool fibers (extending out of a yarn body).
Dehydrating: after the fabric is preshrinked, the fabric is directly dehydrated in a preshrinking machine (similar to the spin-drying operation of a household washing machine) so that the fabric reaches the required moisture content.
Milling: the dewatered fabric is sent into a worsted machine, the wet fabric is subjected to stacking-pulling-extrusion circulation in a rope form in the worsted machine, repeatedly extruded, rubbed and rubbed, and felted is interpenetrated and interweaved under the felting action of wool in the fabric yarn body, and the head end of the wool fiber extends out of the yarn body and the fabric surface to form a suede. The finishing of the fulling is different according to different product varieties, and is generally 60-120 min.
Washing: and (3) cleaning the fabric after the fulling by adopting a rotary washing machine, and washing and removing fibers which fall off in the fulling process, wherein auxiliaries such as a smoothing agent, a softening agent and the like can be added into a washing bath according to requirements.
Dehydrating: and removing redundant water of the fabric by a spin-drying principle.
And (3) scutching: cutting the cylindrical fabric along one side to form a single-layer open width shape.
Shaping: the open-width fabric is continuously wet-heat processed in a setting machine under the action of certain tension to stabilize the size of the fabric, the setting temperature is generally 140-150 ℃, the stay time of the fabric in the setting machine is generally 4-5 min, and the stay time is different according to the type of the fabric.
Shearing: hairiness of a certain length of the cloth cover is sheared by a shearing machine according to different types and styles of fabrics and requirements of customers, and hairiness (the cloth cover Mao Maochang, poor anti-pilling property) below a certain height is reserved.
Steaming woolen cloth: the fabric is treated by the hot steam, internal stress generated by the processing of the fabric is relaxed, the surface of the fabric is smooth and clean (the function is similar to steam ironing), and the processing time is generally about 10 minutes.
And (3) coiling: the formed fabric is wound into a package with a specified (or customer required) length, and the package is inspected, graded and put in storage.
The appearance of the knitted woolen fabric is as shown in fig. 1, the knitted woolen fabric becomes tighter due to shrinkage after the milling process, and the cloth cover has fine nap (formed by the root ends of wool fibers drilled from the yarn body).
The core process of knitting wool fabric processing is 'milling', and milling processing is to use wool fiber special 'milling property (felting property'). The fulling properties of wool are derived from its special scale structure. The wool surface is covered with a scale layer, and the scale has directivity (from the root to the tip) so that when the wool slides along the length direction, the friction coefficient of sliding along the scale is smaller than that of sliding against the scale, which is called as a directional friction effect (also called as a differential friction effect). The wool fiber is repeatedly stretched and retracted, and when the wool fiber is retracted, the two ends of the fiber retract to the mass center by different amounts due to differential friction effect, so that the mass center of the wool is deviated, and the wool moves towards the root direction. This movement causes the wool fibers to interpenetrate, entangle, and become tighter and tighter, resulting in a fibrous article having felted or napped features. The method is a theoretical basis for milling.
The wool content of the yarn must reach a certain proportion, the obvious fulling property can be generated when the fabric is fulled, the wool content is too low, or the wool is mercerized (shrink-proof) to remove the scale layer on the surface of the wool by using a chemical agent, so that the fulling property of the fabric can be lost, and the fulling effect can not be obtained even if the fabric is fulled.
2. Heat-shrinkable fiber
The heat-shrinkable fiber is a differential synthetic fiber, and is a fiber having a higher heat shrinkage in a heat medium (hot air, boiling water, steam) than a conventional thermoplastic synthetic fiber (boiling water shrinkage of conventional synthetic fiber is < 5%), and a fiber having a shrinkage of about 20% is generally referred to as a general-shrinkage fiber, and a fiber having a shrinkage of 35% to 45% is generally referred to as a high-shrinkage fiber.
The heat-shrinkable fiber can be prepared by adopting a chemical modification (adding a copolymerization component during spinning to reduce internal rotational activation energy of macromolecules) or physical modification (adopting low-temperature, low-time stretching and low-temperature drying during spinning), and the basic principle is that macromolecules in the fiber have certain orientation degree (the fiber has certain mechanical and physical properties and basic processability), the crystallinity is reduced or the fiber is not crystallized (the bonding force among the macromolecules of the fiber is weaker and relative sliding is easy to generate), and under the action of higher temperature, the macromolecules of the fiber are easy to recover a crimped state (the natural conformation of the macromolecules of the synthetic fiber is generally in the crimped state) due to the aggravation of thermal movement, so that the length direction of the fiber is obviously shortened.
At present, the high shrinkage fiber which is applied in the industry mainly comprises two types of high shrinkage acrylic fiber and high shrinkage polyester fiber.
The high shrinkage fiber short fiber and other common non-shrinkage or low shrinkage fiber are blended into yarn, or the high shrinkage fiber long fiber and non-shrinkage or low shrinkage fiber long fiber are formed into mixed fiber yarn, and after heat setting relaxation processing, the high shrinkage fiber is shrunk and tightly bound to the core yarn, so that the non-shrinkage or low shrinkage fiber is bent, arched and looped, and the fluffy effect is obtained. The heat shrinkage process may be performed after the yarn formation and before the weaving (such as the bulked yarn shown in fig. 2), or after the weaving into a fabric (such as a wool-like fabric, a manmade fur).
After interweaving the high shrinkage filament yarn and the non-shrinkage or low shrinkage filament yarn into a fabric, the fabric is subjected to heat shrinkage processing, the interweaving area of the high shrinkage yarn is shrunk, the interweaving area of the non-shrinkage or low shrinkage yarn is swelled and foamed, and the crepe fabric or the seersucker fabric can be woven, as shown in figure 3.
The pre-oriented yarn (POY) is a chemical fiber filament with the orientation degree between that of unoriented yarn (UDY) and Drawn Yarn (DY) obtained by high-speed spinning (spinning speed is 3000-6000 m/min), has high contractility, and can be used as heat-shrinkable fiber in industry (the contractility rate is higher than that of common high-shrinkage fiber). The typical application is that Fully Drawn Yarn (FDY) and pre-oriented yarn (POY) are mixed in filament form to form mixed filament, after being woven into fabric, the fabric is subjected to heat treatment, the pre-oriented yarn is contracted, the low-contraction or non-contraction FDY is curled, looped and annularly protruded on the surface of the fabric (similar to short fiber hairiness), so that the filament yarn fabric presents the appearance and the hand feeling of the short fiber yarn fabric.
3. Hollow spindle cladding spinning technology
The hollow spindle cladding spinning technology is a technology for spinning composite yarn with a wrapping structure by taking yarn (filament yarn or spun yarn) as a raw material, and the core mechanism is a hollow spindle device, so that the wrapping and the compounding of the yarn with larger performance difference can be realized by using the hollow spindle device, namely, one yarn (outer wrapping yarn) is wrapped on the other yarn (core yarn) in a spiral line shape. If desired, two coating passes may be performed, i.e. two sets of hollow ingot structures are connected in series, and the yarn obtained after one wrapping is re-wrapped. The composite structure of one wrap (single wrap) and two wraps is shown in fig. 4. Of course, the number of the core yarns may be one or a combination of a plurality of core yarns.
The typical application of the hollow spindle cladding machine is to wrap a piece of pre-drawn spandex yarn with polyester or nylon filament yarn to prepare elastic cladding yarn for weaving elastic knitted fabric. At present, yarn raw material combinations used in coating processing are continuously diversified, and particularly in the field of composite processing of non-elastic yarn coating, such as coating processing of cotton yarns by polyester filament yarns, coating processing of stainless steel wires by cotton yarns and the like. The coating processing can improve the processability of the yarn (such as obviously reducing yarn hairiness, improving yarn strength, reducing strength unevenness, and the like), can also obtain the performance complementation and functionalization of different yarns (adopting the combination of functional filaments and common yarns), and even obtain the color mixture and sectional color appearance through the combination of different color yarns, thereby realizing the non-sizing and non-dyeing of yarn weaving and improving the wear performance (fastness, comfort, appearance retention, functionality, and the like) of the fabric.
However, there has been little research in the prior art to prepare covered yarns or fabrics from wool yarns and high shrinkage filament yarns.
In view of this, the present invention has been made.
Disclosure of Invention
A first object of the present invention is to provide a shrink-wrapped wool yarn to solve at least one of the above problems.
The second object of the invention is to provide a method for producing a shrink-type wool yarn covered yarn.
A third object of the present invention is to provide the use of a shrink-wrapped wool yarn in the preparation of a fabric.
A fourth object of the present invention is to provide a fabric.
A fifth object of the present invention is to provide a method for preparing a fabric.
In a first aspect, the present invention provides a shrink-wrapped wool yarn comprising a core yarn and an outer wrap yarn;
the core yarn is a wool yarn or wool yarn and high-shrinkage filament yarn A;
the outer wrapping yarn is a high shrinkage filament yarn B.
As a further technical scheme, the shrinkage of the high shrinkage filament yarn a or the high shrinkage filament yarn B is 35% -45%.
As a further technical scheme, the wrapping twist of the wrapping yarn is 400 to 600 twists/m.
In a second aspect, the present invention provides a method for preparing a shrinkage type wool yarn covered yarn, wherein a wool yarn or a wool yarn and a high shrinkage filament yarn a are used as a core yarn, and a high shrinkage filament yarn B is covered on the core yarn to prepare the shrinkage type wool yarn covered yarn.
In a third aspect, the present invention provides the use of a shrink-wrapped wool yarn in the preparation of a fabric.
In a fourth aspect, the present invention provides a fabric made primarily from the shrink-wrapped wool yarn.
In a fifth aspect, the present invention provides a method of making a fabric comprising: and (3) weaving and carrying out dry heat shrinkage wool shrinkage on the shrinkage wool yarn cladding yarn in sequence to prepare the fabric.
As a further technical solution, the weaving comprises weft knitting;
preferably, when the core yarn of the shrinkage type yarn is a yarn, the treatment temperature of the dry heat shrinkage tweed is 10 ℃ to 20 ℃ higher than the full heat shrinkage temperature of the high shrinkage filament yarn B;
preferably, when the core yarn of the shrinkage type wool yarn cladding yarn is a wool yarn and a high shrinkage filament yarn a, the treatment temperature of the dry heat shrinkage tweed is 10 ℃ to 20 ℃ higher than the highest full heat shrinkage temperature of the high shrinkage filament yarn a and the high shrinkage filament yarn B.
As a further technical scheme, the weaving and the dry heat shrinkage tweed are also subjected to cleaning and drying;
preferably, the temperature of the drying is not higher than the initial shrinkage temperature of the high shrinkage filament yarn a or the high shrinkage filament yarn B.
As a further technical scheme, the method further comprises the steps of opening, shaping, steaming and rolling after the dry heat shrinkage shrinking woolen;
preferably, in the process of steaming the woolen cloth, the shaping temperature is controlled to be 140-150 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts high shrinkage fiber filament yarn and wool yarn to carry out cladding processing, and weaves into knitted fabric after spinning composite yarn, and the high shrinkage component in the fabric is shrunk by heat treatment, so that the effect similar to 'shrinking woolen' is realized, the fabric is tightly shrunk, the high shrinkage filament yarn in the composite yarn in the fabric is shrunk to enable the wool yarn to protrude out of the surface of the fabric to form yarn loops, and the yarn loops and the cloth cover hairiness form a 'velvet layer' with a special structure, so that the knitted woolen fabric with a special velvet structure is obtained. Compared with the prior art, the invention has the following effects:
(1) the practicability of the yarn raw material is wider.
The invention realizes the shrinkage and the tightness of the fabric through the thermal shrinkage of the high shrinkage fiber, does not depend on the fulling property of the wool fiber any more to realize the shrinkage, and can adopt all wool yarns to process the knitting wool fabric for the requirement of the yarn on no wool content (common wool with a scale layer).
(2) Saving raw materials, energy and emission
The wool fulling property is utilized to carry out the production of the wool fabric for fulling, and the repeated stretching, extrusion and friction during fulling can lead part of wool fibers to fall off from the fabric, generally can reduce the wool content of wool yarns by 2% -3%, and cause the waste of fiber raw materials. At the same time, repeated stretching and rubbing of wet fabrics can also lead to damage (abrasion) of the fibers in the fabrics, causing degradation of the fibers and thus the fabric performance. The dry heat shrinkage woolen cloth eliminates repeated stretching, extrusion and friction of the fabric in a wet state, and cannot cause damage and loss of fibers in the fabric.
The dry heat shrinkage tweed can reduce the use of water and auxiliary agents, and has certain economic and social benefits in the aspects of energy conservation and emission reduction.
(3) Enriches the variety of the patterns of the fabric
The high-shrinkage filament yarns with different types, colors and specifications are adopted to be compounded with the wool yarns with different types, colors and specifications, and the compound yarns with different performances, appearances and styles can be spun by adopting different coating compounding technologies and coating technologies, so that the yarn design and color varieties are enriched, and the design and color varieties of the fabric are increased. For example, if the core yarn and the outer wrapping yarn are the same color, a single-color composite yarn can be spun, and if the core yarn and the outer wrapping yarn are configured in different colors, a melange yarn can be spun (the outer wrapping yarn is wound on the core yarn to form a color block segmentation cover for the core yarn, and the visible surface of the composite yarn has a melange appearance in which color blocks of two colors are alternately arranged). After the composite yarn with the contracted outer wrapping yarn is completely contracted, a structure of high-shrinkage filament yarn and randomly protruding yarn loops after the contraction of the wool yarn is wound is formed; after the core yarn shrinkage type composite yarn is completely shrunk, a structure that the wool yarn bulges out of the coils between the wrapping winding spirals is formed, and the probability that the coils of the two composite yarns appear on the front side and the back side of the fabric is also different, so that different cloth cover styles are formed.
(4) Improving the weaving efficiency
The combination effect of the covering processing of the wool yarn and the high-shrinkage filament yarn can improve yarn strength, reduce strength unevenness and improve yarn evenness, thereby improving the weaving efficiency of a circular knitting machine (reducing the yarn broken joint time in the weaving process) and the quality of the fabric (reducing the cloth surface defects caused by yarn joints).
(5) Obtain special fabric performance and style
After the high-shrinkage filament yarn in the fabric is completely shrunk, the linear density is increased, so that the hand feeling stiffness of the final fabric is increased, and the hand feeling of the fabric after different shrinkage can be obtained by adjusting the initial linear density (thickness) of the high-shrinkage filament yarn or the machine-out density of the original fabric. The hand feeling of the fabric is different from that of common woolen fabrics, and the fabric has a special style.
The surface plush layer of the dry-milling woolen fabric is formed by the wool yarn loops and the hairiness held by the cloth cover, and the touch comfort of the cloth cover is mainly determined by the wool yarn loops, so that the surface plush layer has a touch style and a visual style different from those of common knitting wool fabrics.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a knitted woolen fabric;
FIG. 2 is a bulked yarn;
FIG. 3 is a seersucker fabric;
FIG. 4 is a schematic illustration of the mechanism of covering yarn;
FIG. 5 is a drawing of the principle of wrap yarn shrinkage type wool yarn wrap spinning;
FIG. 6 is a core yarn shrinkage type wool yarn cladding spinning principle;
FIG. 7 is a schematic diagram of a process of drying and dry heat shrinkage tweed;
FIG. 8 is the heat shrinkage behavior of polyester POY;
FIG. 9 is a yarn appearance of 3 wool yarn covered yarns;
FIG. 10 is an appearance of 3 yarn covered bobbins;
FIG. 11 is a fully contracted configuration of the 3 covered yarns;
FIG. 12 is a wrap yarn shrink wrap yarn fabric;
FIG. 13 is a core shrink wrap yarn fabric-nylon high stretch yarn wrap;
fig. 14 is a core shrink wrap yarn fabric-PBT stretch yarn wrap.
Icon: 1-a core yarn bobbin; 2-a yarn guiding hook; 3-tensioners; 4-hollow ingots; 5-spindle tube; 6-wrapping yarn; 7-meeting a yarn guiding hook; 8-a yarn guiding roller; 9-a yarn guide rod; 10-traversing yarn guide; 11-winding roller; 12-yarn forming bobbins.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to embodiments and examples, but it will be understood by those skilled in the art that the following embodiments and examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The specific conditions are not specified, and the process is carried out according to conventional conditions or conditions suggested by manufacturers. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
In a first aspect, the present invention provides a shrink-wrapped wool yarn comprising a core yarn and an outer wrap yarn;
the core yarn is a wool yarn or wool yarn and high-shrinkage filament yarn A;
the outer wrapping yarn is a high shrinkage filament yarn B.
The yarn selection in the present invention is as follows:
(1) selecting wool yarns: the technology realizes the tight shrinkage of the fabric through the thermal shrinkage of the thermal shrinkage fiber; the yarn loops formed by bending and protruding the wool yarn components on the surface of the fabric are formed by the shrinkage of the high-shrinkage filament yarn to form a wool layer on the surface of the fabric, and the shrinkage of the fabric and the increase of wool are realized without depending on the fulling property of wool fibers, so that the wool yarn used in the technology is selected by only selecting wool yarns which are spun by combing wool spinning or semi-worsted technology and have the style and the hand feeling of the wool yarn, and the fiber material of the yarns is not limited, namely, wool fibers can be not used in the fiber raw material, or a small amount of wool fibers can be used, or wool subjected to mercerization (shrink prevention) treatment can be adopted for the wool fibers, and the processing and the effect of dry shrinkage are not influenced. The requirements of components, mixing ratio, linear density, color and the like of the fabric can be comprehensively considered according to the style, market demand and customer requirement of the fabric, and the fabric can be purchased in the yarn market or spun in a yarn factory (custom spinning).
(2) High shrinkage filament yarn selection: in order to compound the wool yarn and the high shrinkage fiber, the technical scheme selects the high shrinkage filament yarn as a shrinkage component. Key parameters of the high shrinkage filament yarn include fiber type, gauge parameters, heat shrinkage temperature, and shrinkage, where shrinkage may be, for example, but not limited to, 35%, 37%, 39%, 41%, 43%, or 45%. The fiber types, such as terylene, chinlon, PBT (polybutylene terephthalate) and the like, can be selected according to the style and the wearability requirements of the fabric; the specification parameters include bus density, monofilament linear density, color and the like, and can be selected according to the style and the service performance requirements of the fabric; the heat-shrinkage temperatures include the onset shrinkage temperature and the full shrinkage temperature, wherein the full shrinkage temperature is more important, i.e., the temperature at which the high shrinkage filament yarn needs to reach full shrinkage (reaches the shrinkage limit and then warms up without re-shrinking), and due to the structural characteristics of the high shrinkage fiber, the full shrinkage temperature is generally lower than the processing temperature that can be tolerated by conventional fiber processing (the shorter action time does not impair the fiber properties and fabric quality), but if the wool yarn blend component contains fibers with lower melting points (such as polypropylene), the high shrinkage filament yarn with lower full shrinkage temperature must be selected; the heat shrinkage rate is considered in combination with the lower machine density (square meter weight) of the circular knitting machine woven fabric and the target fabric density (square meter weight), if the target fabric density is unchanged, high-shrinkage filament yarns with relatively high heat shrinkage rate are selected if the weaving density is low, otherwise, the weaving fabric density of the circular knitting machine is adjusted under the condition that the heat shrinkage rate of the high-shrinkage filament yarns is fixed, so that the target density requirement is met after the circular knitting machine woven fabric is shrunk.
In the present invention, the high shrinkage filament yarn a or the high shrinkage filament yarn B may be the same type of high shrinkage filament yarn or may be different high shrinkage filament yarns.
(3) Selecting an outer wrapping yarn of the core yarn shrinkage type wool yarn wrapping yarn: when the core yarn shrinkage type yarn wrapping yarn is shrunk by heating, the high shrinkage filament yarn shrinks, the yarn is bent and looped, at this time, in order to ensure that the yarn loops form the surface layer suede of the fabric, the wrapping yarn should have certain shrinkage, when the high shrinkage filament yarn shrinks, the wrapping yarn can also shrink (the shrinkage rate can be smaller than that of the high shrinkage filament yarn), the yarn can be tightly bound on the shrunk high shrinkage filament yarn, the yarn structure in the fabric is kept stable, the yarn loop structure is stable, and the wrapping yarn can also relax, bend and bulge like the yarn loops, and forms a cloth surface velvet layer together with the yarn loops. The shrinkage of the overwrapped yarn can be achieved by two principles: firstly, the wrapping yarn has larger elasticity (high-elastic yarn), when the wrapping yarn is wound on the core yarn, the wrapping yarn is subjected to larger elastic elongation under the action of winding tension, and when the high-shrinkage filament yarn is shrunk, the wrapping yarn is elastically shrunk, but still maintains the wrapping structure of the core yarn, and a yarn loop cannot be expanded; and secondly, the outer wrapping yarn also adopts shrinkage fiber, the shrinkage temperature of the outer wrapping yarn is not higher than that of the high-shrinkage filament yarn, and the thermal shrinkage rate of the outer wrapping yarn can be lower than that of the high-shrinkage filament yarn, so that when the high-shrinkage filament yarn is shrunk, the outer wrapping yarn also has certain thermal shrinkage, and the certain wrapping tightness of the core yarn (the high-shrinkage filament yarn after shrinkage and the wool yarn core yarn) is maintained.
In some preferred embodiments, the wrap twist of the wrap yarn may be, for example, but not limited to, 400, 450, 500, 550, or 600 turns/meter.
The key process parameter of the cladding process is the degree of wrapping twist (the number of loops per unit length of core yarn that are wrapped around the overwrapped yarn). The wrap twist affects the morphology and density (number of loops per unit length of yarn) of the loops of the yarn after heat shrinkage of the composite yarn. The higher the wrap twist, the smaller the single coil shape and the higher the coil density, which are important factors for determining the suede effect of the dry-shrink fabric (the shape and density of the coil, which are also related to the softness of the wool yarn itself, the softer the wool yarn, and the higher the coil density and the lower the coil shape under the same conditions).
The wrap twist is adjusted by the yarn threading speed, thus affecting the yield. Considering the yield and the coil effect, the wrapping twist is preferably 400 to 600 twists/m.
In a second aspect, the present invention provides a method for preparing a shrinkage type wool yarn covered yarn, wherein a wool yarn or a wool yarn and a high shrinkage filament yarn a are used as a core yarn, and a high shrinkage filament yarn B is covered on the core yarn to prepare the shrinkage type wool yarn covered yarn.
The preparation method is simple and convenient. For example, a hollow spindle cladding technique (equipment) can be adopted, and the composite of the wool yarn and the high-shrinkage filament yarn is realized by spinning cladding yarn by taking the wool yarn and the high-shrinkage filament yarn as raw materials.
The cladding yarn spinning technology can adopt the following two technical schemes:
(1) shrink type wool yarn cladding yarn of the outer wrapping yarn: the covering yarn is spun by taking the wool yarn as the core yarn and the high-shrinkage filament yarn as the outer wrapping yarn. The technical route is shown in figure 5.
The wool yarn is led out from the core yarn bobbin 1, passes through the yarn guiding hook 2 positioned above the package center, passes through the adjustable tensioner 3, enters the central tube of the hollow spindle 4 from the lower end, and passes out upwards. The spindle tube 5 is movably sleeved on the hollow spindle 4, and is fixed on the hollow spindle 4 by a lower holder and a spindle cap so as to rotate together with the hollow spindle 4. The spindle tube 5 is wound with an outer wrapping yarn 6 (high shrinkage filament yarn, which is wound on the spindle tube 5 by a special winder before the wrapping process), the outer wrapping yarn 6 is unwound from the spindle tube 5 and drawn out to meet the core yarn drawn out from the upper end of the central tube of the hollow spindle 4 at a meeting yarn guide hook 7. The spindle tube 5 rotates at a high speed together with the hollow spindle 4 to drive the outer wrapping yarn 6 to rotate at a high speed, and the outer wrapping yarn 6 is wound on the core yarn. The composite yarn is guided and output by a yarn guiding roller 8, guided by a yarn guiding rod 9, passes through a yarn guiding porcelain hole on a traverse yarn guide 10, is wound on a yarn forming bobbin 12 which is in friction transmission by a winding roller 11 in a cross winding mode under the guidance of the traverse yarn guide 10, and is wound into a yarn bobbin.
(note: since the yarn has a large hairiness, the unwinding resistance is high when unwinding from the spindle bobbin at a high speed, and coating processing cannot be performed by using the yarn as an outer-wrap yarn and a high-shrinkage filament yarn as a core yarn in a hollow spindle coating machine currently used in industry).
The resulting yarn structure is shown in fig. 4 (a) as a single wrap yarn, wherein the core yarn is a wool yarn and the over wrap yarn is a high shrinkage filament yarn.
(2) Core yarn shrinkage type wool yarn cladding yarn: the method is characterized in that the wool yarn and the high-shrinkage filament yarn are used as core yarn, the high-shrinkage filament yarn (which can be the same as or different from the high-shrinkage filament yarn used as the core yarn) or other synthetic fiber high-elastic filaments are used as outer wrapping yarn for wrapping and compounding, and the composite yarn of the wool yarn and the high-shrinkage filament yarn is spun, so that the composite of the wool yarn and the high-shrinkage filament yarn is realized. The technical route is shown in figure 6.
The wool yarn and the high shrinkage filament yarn are respectively led out from respective bobbins, led out from a core yarn bobbin 1, pass through a yarn guiding hook 2 positioned above the package center, pass through an adjustable tensioner 3, enter a central tube of a hollow spindle 4 from the lower end, and pass out upwards. The spindle tube 5 is movably sleeved on the hollow spindle 4, and is fixed on the hollow spindle 4 by a lower holder and a spindle cap so as to rotate together with the hollow spindle 4. The spindle tube 5 is wound with an outer wrapping yarn 6 (high shrinkage filament yarn, which is wound on the spindle tube 5 by a special winder before the wrapping process), the outer wrapping yarn 6 is unwound from the spindle tube 5 and drawn out to meet the core yarn drawn out from the upper end of the central tube of the hollow spindle 4 at a meeting yarn guide hook 7. The spindle tube 5 rotates at a high speed together with the hollow spindle 4 to drive the outer wrapping yarn 6 to rotate at a high speed, and the outer wrapping yarn 6 is wound on the core yarn. The composite yarn is guided and output by a yarn guiding roller 8, guided by a yarn guiding rod 9, passes through a yarn guiding porcelain hole on a traverse yarn guide 10, is wound on a yarn forming bobbin 12 which is in friction transmission by a winding roller 11 in a cross winding mode under the guidance of the traverse yarn guide 10, and is wound into a yarn bobbin. A covering yarn of wool yarn and high shrinkage filament yarn was obtained, and the resulting yarn structure was as in (b) of fig. 4.
In a third aspect, the present invention provides the use of a shrink-wrapped wool yarn in the preparation of a fabric.
The shrinkage type wool yarn coated yarn provided by the invention has high yarn strength and good uniformity, and is beneficial to improving the weaving efficiency and the quality of fabrics.
In the present invention, "fabric" refers to a fabric woven from yarns and a product further processed from the fabric.
In a fourth aspect, the present invention provides a fabric made primarily from the shrink-wrapped wool yarn.
The fabric has good tactile comfort and high quality.
In a fifth aspect, the present invention provides a method of making a fabric comprising: and (3) weaving and dry heat shrinkage wool (dry wool) are sequentially carried out on the shrinkage wool yarn cladding yarn to prepare the fabric.
In the invention, for the weaving step, the weaving density of the knitted raw cloth can be determined according to the target fabric density and the shrinkage rate of the high shrinkage fiber, and the knitting raw cloth can be woven by adopting a circular knitting machine according to the yarn specification and the fabric style and design of the weave, the loop length, the loop density (the loop length and the density of the knitted fabric) and other machine processes of the fabric.
In the dry heat shrinkage step, the fabric is subjected to dry heat treatment, and the treatment temperature is controlled to be higher than the full heat shrinkage temperature of the heat shrinkage fiber (for example, 10 ℃, 12 ℃, 14 ℃, 16 ℃, 18 ℃ or 20 ℃ depending on the quantitative difference of the fabric), so that the fabric is fully shrunk (to the maximum shrinkage amount thereof).
The high shrinkage filament yarn in the fabric yarn is shrunk in length under the heat application, so that the length of the fabric is shortened, and the fabric is compact due to the shrinkage of the yarn length; meanwhile, since the wool yarn does not shrink or the shrinkage is significantly smaller than that of the high-shrinkage filament yarn, the yarn is bent and swelled to form yarn loops, floats on the surfaces of the yarn and the fabric, and forms a 'suede layer' together with the hairiness (fiber ends) on the surface of the fabric.
In some preferred embodiments, the weaving and the dry heat shrinking tweed further comprise washing and drying therebetween.
Wherein, the cleaning is to remove stains generated in the spinning and weaving processes, and a certain amount of detergent can be added during cleaning to improve the cleaning effect (the variety and the dosage of the detergent are according to the conventional requirements). The cleaning temperature is controlled below the initial shrinkage temperature of the heat-shrinkable fibers so as to avoid irregular shrinkage of the fabric in advance.
The washed fabric is dried by adopting a hot air dryer, and the temperature of circulated hot air is controlled to be not more than the initial shrinkage temperature of the heat-shrinkable fiber.
The principle of the drying and shrinking process is shown in figure 7.
The dewatered fabric enters a dryer (conventional hot air drying equipment) in open width, and is repeatedly folded and moved under the guidance of guide rollers, so that the drying efficiency is increased, the excessive moisture is discharged under the heating action of flowing hot air, and meanwhile, the temperature of the fabric is increased, so that preparation is made for drying of the woolen cloth. The dried fabric enters a drying and shrinking woolen machine, and the fabric is fed onto a rotary curtain by a feeding roller, so that an overfeeding effect is formed due to the fact that the rotary linear speed of the curtain is lower than the feeding speed of the feeding roller, and a length allowance is provided for shrinkage of the fabric. The fabric moving with the shade reaches or even exceeds the full shrinkage temperature of the high shrinkage filaments under the action of hot air, and the fabric shrinks to the full shrinkage state of the high shrinkage filaments and is output by the output roll. The speed of the rotary curtain and the speed of the output roller are comprehensively determined according to the speed of the feeding roller and the longitudinal shrinkage of the fabric.
In some preferred embodiments, the drying heat shrinking and shrinking process further comprises opening, shaping, steaming and rolling.
And (3) scutching: cutting the cylindrical fabric along one side to form a single-layer open width shape.
Shaping: continuous thermal processing is carried out on open-width fabric under the action of certain longitudinal and transverse tension in a setting machine, and the bending and the curling possibly generated in the processing process of the dry-shrinkage filament yarn are eliminated, so that the structure and the size of the fabric are stabilized, the setting temperature is comprehensively considered according to the fiber components of the fabric and the specification of the fabric, and the residence time of the fabric in the setting machine is also set according to the different fiber components and the different varieties (thickness) of the fabric. The basis for the setting is that the properties of the fibres and the quality of the fabric (such as colour change in appearance) cannot be impaired. Since the high shrinkage fiber in the fabric is completely shrunk, the structure is stable, and the shrinkage rate is not affected any more due to the heat setting temperature and time. In the subsequent processing and use of the fabric, as long as the temperature is not higher than the heat setting temperature, the stable form of the fabric is kept unchanged, so that the heat setting temperature can be mastered at a higher level, generally can be controlled between 140 ℃ and 150 ℃, and when the fiber component contains a component with poor tolerance to higher temperature, the heat setting temperature can be properly reduced, and the heat setting time is correspondingly prolonged.
Steaming woolen cloth: the fabric is treated by the hot steam, the internal stress generated by the processing of the fabric is relaxed, the surface of the fabric is smooth and clean, and the processing time is comprehensively considered according to the fiber components of the fabric and the specification of the fabric, so that the process effect is achieved.
And (3) coiling: the formed fabric is wound into a package with a specified (required) length, inspected, and then put in storage.
The invention is further illustrated by the following specific examples and comparative examples, however, it should be understood that these examples are for the purpose of illustration only in greater detail and should not be construed as limiting the invention in any way.
Examples
1 high shrinkage filament yarn and heat shrinkage property thereof
The high shrinkage filament yarn used was 150D/72F polyester POY (pre-oriented yarn) and the color was light gray.
To grasp the heat shrinkage performance, the heat shrinkage performance was tested. The shrinkage of the high shrinkage filament yarn sample was measured at a length of 20cm and a heat treatment temperature of 3 minutes, and the results of measuring the shrinkage with temperature are shown in FIG. 8.
As can be seen from fig. 8, the polyester POY used did not shrink at 60 ℃ and significantly shrunk at 70 ℃, indicating that the heat shrinkage initiation temperature was between 60 ℃ and 70 ℃. The heat shrinkage increases with increasing temperature to 90 c, reaching the shrinkage limit (full shrinkage), indicating that the full shrinkage temperature is between 80 c and 90 c, and after exceeding 90 c, the temperature increases again, the shrinkage no longer increases (the yarn straightens no longer changing), but a different degree of crimping (bending, crimping) occurs, and with increasing temperature the degree of crimping increases.
And it was observed in the test that the shrinkage rate increased with increasing temperature, and that after temperatures exceeding 90 c, the filament yarn completed complete shrinkage in 30 seconds.
The thermal shrinkage mechanism of the fiber is as follows: the fiber absorbs heat, the thermal movement of macromolecules in the fiber is aggravated, the macromolecules overcome intermolecular acting force and shrink, and the shrinkage of the fiber is restored in a spiral conformation. The higher the heat treatment temperature, the faster the fiber absorbs heat and the faster the shrinkage. When the fiber is restored to its contracted configuration, the heating is continued, and the macromolecules will not contract again, but will deform due to thermal movement, causing the fiber to irregularly bend and curl.
The 20cm filament yarn sample was heat treated at 90 ℃ for 2 minutes (sufficient shrinkage) and the average length after complete shrinkage was found to be 7cm, then the average heat shrinkage was (20-7)/20=65%.
2 spinning and Heat shrinkage Property of the covered yarn
The wool yarn used for spinning the composite yarn is selected as 38 count semi-worsted wool yarn, and the color is black.
(1) Shrink type wrapping yarn for outer wrapping yarn
The core yarn adopts 38-count black wool yarn, the outer wrapping yarn adopts light gray polyester POY, and the wrapping twist is 500 twists/meter.
(2) Core yarn shrinkage type cladding yarn
2 kinds of core yarn shrinkage type covering yarns are spun together.
(1) The core yarn adopts 38-count black wool yarn and light gray polyester POY to be combined into double-core yarn, the outer wrapping yarn adopts white 50D/24F nylon (PA 6) stretch yarn (high stretch yarn), and the wrapping twist is 500 twists/meter.
(2) The core yarn adopts 38-count black wool yarn and light gray polyester POY to be combined into double-core yarn, the outer wrapping yarn adopts white PBT (polyester 4) filament yarn with nominal thermal shrinkage of 38% (data provided by fiber manufacturers) and linear density of 50D/24F, the measured complete shrinkage temperature is 80 ℃, and the complete shrinkage time is less than 30 seconds at 80 ℃.
The appearance of the 3 composite yarns is shown in fig. 9 and 10. The drawing shows that the core yarn shrinkage type cladding yarn with the wrapping yarn shrinkage type cladding yarn and the PBT filament yarn as the wrapping yarn are sequentially formed from top to bottom.
As can be seen from fig. 9 and 10, the outer wrapped yarn shrinkage type single core Bao Fuge yarn has a uniform tinged gray color (a mixed color effect of alternately arranged black and light gray blocks), and the other two types of double-core single core yarn shrinkage type outer wrapped yarns have an inter-color tinged gray appearance, and the double-core yarns consisting of the black wool yarns and the light gray high shrinkage filament yarns have false twist and twist when being subjected to the tension of the outer wrapped yarns, so that the outer wrapped yarns have the inter-color appearance similar to that of the segment colors.
Since the PBT filament yarn has a large elasticity (one of the characteristics of PBT fibers), the yarn is in an irregularly bent state in a natural state.
(3) Morphological changes after thermal shrinkage of yarn
The 3 yarns are completely contracted by heat treatment (90 ℃ for 2 minutes) and are in a form shown in fig. 11, wherein the three yarns are core yarn contraction type double-core single-Bao Baofu yarns with outer wrapping yarn contraction type single-core single-Bao Baofu yarns with outer wrapping yarn as nylon stretch yarns and core yarn contraction type double-core single-Bao Baofu yarns with outer wrapping yarn as PBT filament yarns from top to bottom.
As can be seen from fig. 11, the core yarn of the spun yarn shrinkage type single core Bao Baofu yarn is position-exchanged with the spun yarn due to the heat shrinkage of the high shrinkage filament yarn, the yarn which is the core yarn becomes the spun yarn, and the yarn has a redundant length due to the high shrinkage of the filament yarn, and has a loosely wound appearance with protruding loops along the length direction of the composite yarn. The 2 kinds of core yarn shrinkage type cladding yarns show similar appearance after heat treatment, and due to the heat shrinkage of the high shrinkage filament core yarns, the wool yarns protrude from the winding spiral lines of the outer wrapping yarns to form yarn loops, the yarn loops have an open omega shape and a cross closed shape, and two ends of the yarn loops are still tightly wound and fixed on the shrunk filament core yarns by the outer wrapping yarns which are elastically shrunk or heat shrunk.
The form of the yarn after shrinkage of the yarn covered is given herein only for ease of understanding the form, shape and distribution characteristics of the loops of the yarn after heat shrinkage of the yarn.
And tensioning the contracted yarn, measuring the contracted length of the yarn, and comparing the contracted length with the length of the yarn sample before contraction to obtain a reference value of the yarn contraction rate. The measured thermal shrinkage rates of the 3 kinds of coated yarns are 58%, 65% and 65% in sequence, wherein the shrinkage rate of the single-core single-package outer-wrapped yarn shrinkage type composite yarn is smaller than that of the high-shrinkage filament yarn, which indicates that in the shrinkage process of the outer-wrapped yarn, the positions of the two yarns are exchanged to overcome larger steric hindrance, and part of the filament is shrunk and consumed by buckling deformation. The thermal shrinkage of the two double core single Bao Baofu yarns was the same as the high shrinkage filament yarn, indicating that no significant resistance was experienced during shrinkage of the high shrinkage core yarn.
3 knitted fabric and dry thermal shrinkage woolen cloth thereof
Weft knitting is carried out on the 3 wool yarn cladding yarns to obtain weft knitting fabrics, and then dry heat shrinkage wool shrinkage, scutching, shaping, wool steaming and rolling are sequentially carried out to obtain the fabric, as shown in fig. 12, 13 and 14.
To allow for reasonable shrinkage of the fabric, the fabric was woven at a lower density (80 needles/11 inch) and the fabric weave was plain weave. The same weaving process was used for the 3 yarns for comparison.
The dry-milling (dry heat shrinkage milling) treatment condition is 100 ℃ for 2 minutes.
The fabric in the figure is placed on a standard A4 black cardboard for visual comparison. In each figure, the fabric front side sample is on the upper side, and the fabric back side sample is on the lower side (marked points in the figure are the length direction shrinkage test reference points).
As can be seen from fig. 12, 13 and 14:
(1) the 3 fabrics all underwent significant shrinkage after heat treatment. The shrinkage was measured as follows:
| fabric type | Shrinkage in machine direction | Shrinkage in transverse direction |
| Shrink type wrapping yarn fabric of outer wrapping yarn | 37％ | 54％ |
| Core yarn shrinkage type cladding yarn fabric-nylon high-elastic yarn cladding | 43％ | 47％ |
| Core yarn shrinkage type coated yarn fabric-PBT high shrinkage yarn coating | 40％ | 47％ |
Because of the loop formation and sleeve structure of the knitted fabric, the shrinkage rates of the knitted fabric in the longitudinal direction (wale direction) and the lateral direction (course direction) are different, the lateral shrinkage rate is significantly larger than the longitudinal shrinkage rate, and the lateral shrinkage rates of the 3 knitted fabrics are approximately the same; the shrinkage rate in the longitudinal direction is different due to the different yarn structures and linear densities (but the difference is not large), the shrinkage rate of the shrinkage type wrapping yarn fabric of the outer wrapping yarn is minimum (consistent with the rule of the shrinkage rate of the yarn), and the shrinkage rate of the fabric of the shrinkage type wrapping yarn of the nylon high-elastic yarn wrapping core yarn is maximum.
(2) After the fabric is completely contracted, the black wool yarn loops can protrude from the surface of the fabric to form a cover on the surface of the fabric, so that the color of the fabric is deepened after the shrinkage. But the characteristics of the loop protrusions of the 3 fabrics are different: the shrinkage type wrapping yarn fabric with the outer wrapping yarn has small difference of protruding yarn loops on the front and the back (small difference of color on the front and the back after shrinkage); the core yarn shrinkage type coated yarn fabric has obvious difference in the protruding quantity of yarn loops on the front side and the back side (the difference in the color of the front side and the back side after shrinkage is large), the yarn loops mainly protrude on the back side (one side of a loop arc pressing loop column), and the protruding quantity of the yarn loops on the front side is much smaller.
In practice, if the core yarn and the wrapping yarn are the same color, the difference of the color of the front side and the back side is not seen, but the difference of the distribution of the yarn loops on the front side and the back side is the same.
It can be deduced that: if other weave structures such as rib weave (front wales and back wales are alternately arranged) or double-back weave (front courses and back courses are alternately arranged) are used, the effect of the same front and back can be obtained.
In practice, the fabric structure can be selected according to the actual use and the requirements of the fabric, and the occurrence rule of the yarn loops can be controlled. For example, with the rib weave or double back weave described above, the stripes created by the raised loops can be formed on the fabric surface as the back courses or wales are more pronounced.
(3) The fabric which is completely contracted in a loose state can cause uneven surface of the fabric due to buckling deformation of yarn loops in the fabric, but can obtain a flat cloth cover after shaping and finishing. Since the high shrinkage fiber has been completely shrunk, even if the setting temperature is higher than the dry-milling temperature, the re-shrinkage of the high shrinkage filament is not caused, but the crimp of the high shrinkage fiber can be straightened and the straightened state (the universality of the thermoplastic fiber) can be maintained.
Because the different-color yarns are adopted for coating, the outer wrapping yarn shrinkage type coated yarn fabric has a color mixing appearance, and the fabric of the core yarn shrinkage type coated yarn has a special snowflake-like (camouflage) appearance.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The shrinkage type wool yarn cladding yarn is characterized by comprising core yarns and outer wrapping yarns;
the core yarn is a wool yarn and a high shrinkage filament yarn A;
the outer wrapping yarn is high-shrinkage filament yarn B;
the shrinkage rate of the high shrinkage filament yarn A or the high shrinkage filament yarn B is 35-45%;
the wrapping twist of the wrapping yarn is 400-600 twists/m.
2. The method of producing a shrinkable yarn covered yarn according to claim 1, wherein the shrinkable yarn covered yarn is produced by covering the core yarn with the high-shrinkage filament yarn B using the yarn and the high-shrinkage filament yarn a as the core yarn.
3. Use of the shrink-wrapped wool yarn according to claim 1 or the shrink-wrapped wool yarn prepared by the preparation method according to claim 2 for preparing fabrics.
4. A fabric produced from the shrink-wrapped wool yarn of claim 1.
5. A method of making a fabric as claimed in claim 4, comprising: the shrinkage type wool yarn coated yarn according to claim 1 is woven and subjected to dry heat shrinkage, so that a fabric is obtained.
6. The method of making according to claim 5, wherein the weaving comprises weft knitting;
the treatment temperature of the dry heat shrinkage tweed is 10-20 ℃ higher than the highest full heat shrinkage temperature of the high shrinkage filament yarn A and the high shrinkage filament yarn B.
7. The method of claim 5, further comprising washing and drying between the weaving and the dry heat shrinking tweed;
the temperature of the drying is not higher than the initial shrinkage temperature of the high shrinkage filament yarn a or the high shrinkage filament yarn B.
8. The method of claim 5, wherein the drying heat shrinking is followed by scutching, shaping, steaming and rolling;
in the process of steaming woolen cloth, the shaping temperature is controlled to be 140-150 ℃.
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| CN215757796U (en) * | 2021-07-20 | 2022-02-08 | 江阴市薪天纱业有限公司 | Colorful pearl yarn with free pearl effect |
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