CN112030295A

CN112030295A - Shape-retaining knitting yarn, and method and device for producing same

Info

Publication number: CN112030295A
Application number: CN202010938857.3A
Authority: CN
Inventors: 司志奎; 张守刚; 张婷; 马晓琪; 周栋; 王惠
Original assignee: Luthai Textile Co Ltd
Current assignee: Luthai Textile Co Ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2020-12-04

Abstract

The invention belongs to the technical field of spinning, and particularly relates to a shape-retaining knitting yarn and a preparation method and a device thereof. The shape-retaining knitting yarn has a covering yarn structure of covering fiber and core yarn, wherein the mass of the covering fiber is 60-90% of the total mass of the covering fiber and the core yarn, the mass of the core yarn is 10-40% of the total mass of the covering fiber and the core yarn, and the core yarn is staple fiber yarn or chemical fiber filament yarn. The knitting yarn has little hairiness and good shape retention, and can solve the industrial problems that the hairiness of the knitting yarn affects the weaving efficiency and quality and the shape retention is poor; and the knitted fabric has good comfort, excellent wear resistance and pilling resistance.

Description

Shape-retaining knitting yarn, and method and device for producing same

Technical Field

The invention belongs to the technical field of spinning, and particularly relates to a shape-retaining knitting yarn and a preparation method and a device thereof.

Background

With the development of science and technology and the improvement of the living standard of people, the pursuit of elastic, comfortable, leisure, fashionable and beautiful textiles and clothing products becomes a social development trend.

The knitted product has the characteristics of elasticity, comfort, good ventilation, fashion, beauty and the like, and accords with the development trend of the society. Therefore, the knitting industry has developed faster in recent years. The branch specialties such as weft knitting, warp knitting, flat knitting machine and hosiery machine in the knitting industry relate to several parts such as raw materials, spinning, weaving, printing and dyeing, modeling, sewing and the like, and are systematic engineering with wide coverage and relatively close interconnection. Meanwhile, the new material, the new process and the new technology are applied to the knitted clothes, so that the knitted product is more comfortable to wear and has more excellent performance. The knitted product is widely used for sports clothes, daily clothes and industrial textiles.

The prior yarn for the knitted clothing product has the advantages that chemical fiber filaments are used more frequently, the chemical fiber filaments are high in strength, good in elongation, less in hairiness and high in weaving efficiency, but the problem of poor comfort exists; the short fiber yarns such as cotton are used for knitting, the fabric comfort is good, but the problems of short fiber yarn hairiness, neps, yarn defects and the like exist, so that the problems of low knitting speed, low efficiency, low quality and the like are caused, particularly, the cellulose yarns such as cotton are applied to weft knitting products and warp knitting products, the knitted products have poor shape retention, cannot be used for high-grade products such as knitted business casual shirts and the like, and are only used as common knitted undershirts, cultural shirts and the like.

Although the existing compact spinning technology provides technical support for hairiness reduction and shape retention, the hairiness problem is not completely solved. The ring spinning covering yarn technology has a good covering effect on elastic yarns, but for covering non-elastic chemical fiber filament yarns, because the filaments are too smooth, the combination of the sheath yarns and the core yarns is poor, the yarns rub in production, the sheath yarns easily slip on the core yarns, cotton balls are formed or the core yarns are broken, knitting weaving is influenced, and needles are broken or defective fabrics are discharged.

The air-jet vortex spinning technology is a novel spinning technology which is developed rapidly in the last decade, roving and spooling are omitted, yarn is directly spun from slivers, the spinning speed is 15-30 times of that of ring spinning, and the air-jet vortex spinning technology has the characteristics of high speed, full-automatic spinning, little filoplume and the like. The yarn forming principle is as follows: the strand drafted by the roller enters a special spinning spindle and a spinning box, is formed by parallel core fibers under the action of rotating airflow, and wraps the outer layer fibers with the inner layer fibers to realize spinning. The spinning principle determines that the air-jet vortex spinning is tight outside and loose inside, and the ring spinning is tight outside and loose inside, so that the air-jet vortex spinning has a harder and more comfortable hand feeling than the ring spinning. The air-jet vortex spun yarn basically eliminates harmful hairiness, has less harmful hairiness than ring compact spinning, has the advantages of good wear resistance and pilling resistance, and has a yarn body structure with good moisture-conducting effect. The air jet vortex spinning technology determines the raw material requirement due to the yarn forming principle: the fiber length is long, the fineness is thin, the initial modulus of the fiber is low, the uniformity is good, the carding quality is good, and the quality of at least more than 80 fibers in the yarn is stable. The strength of the air-jet vortex spinning is 15-30% lower than that of ring spinning, the yarn levelness CV% is 1-2% higher than that of compact spinning, and hairiness is less than that of compact spinning and is within 0-5 hairiness of 3mm and above. The yarn count range is narrower than that of ring spinning, the spun yarn count range is 10S-70S, and the higher the yarn count, the lower the strength. Therefore, the air jet vortex spinning is suitable for the production of chemical fiber-based and blended yarns. The strength of the pure cotton yarn is reduced more than 40S, and the method is not suitable for the production of pure cotton air-jet vortex spinning.

Chinese patent CN109706609A discloses an vortex spinning knitted fabric and textile process, the fabric yarn: adopting polyacrylonitrile fiber, carrying out humidifying treatment before vortex spinning to enable the water content of the fiber to reach 12% -16%, and carrying out vortex spinning. This patent does not address yarns for knitting cellulose fibers such as cotton fibers, and is not as comfortable as cotton fibers.

Chinese patent CN102493067A discloses a process for producing a yarn with jean style, comprising the following steps: (1) preparing the colored leather yarn: taking various loose fibers, firstly coloring the loose fibers, then mixing the colored loose fibers according to a certain proportion, and preparing colored leather yarns by a pre-spinning process; (2) selecting core yarns: the core yarn is selected from one or more of staple fiber yarn or filament yarn, twisted yarn and air textured yarn; (3) and spinning: and (3) feeding the prepared colored leather yarn and the core yarn into semi-free end spinning equipment for spinning to obtain the yarn with the denim style. The colored sheath yarn in this patent is made by conventional pre-spinning process, while the white core yarn is selected from spun or filament yarn, but its function is only to obtain the jean style of "uneven white exposure" rather than the colored sheath yarn and core yarn being dyed together.

Aiming at the problems of hairiness, yarn defects, strength, poor shape retention, insufficient comfort and functionality and other pain points of short fiber yarns for the knitting industry, the knitting yarn which has good shape retention, comfort and functionality and takes knitting efficiency and quality into consideration is urgently needed to be provided.

Disclosure of Invention

The invention aims to provide the shape-retaining knitting yarn which has the advantages of little hairiness, good shape retention, good comfort, wear resistance and pilling resistance, and solves the problems of hairiness and shape retention in the prior art; the invention also provides a preparation method and a device of the conformal knitting yarn.

The shape-retaining knitting yarn is a covering yarn structure with a core yarn covered by an outer covering fiber, wherein the mass of the outer covering fiber is 60-90% of the total mass of the outer covering fiber and the core yarn, the mass of the core yarn is 10-40% of the total mass of the outer covering fiber and the core yarn, and the core yarn is staple fiber yarn or chemical fiber filament yarn.

The outer-coated fiber is one or more of combed cotton fiber, viscose fiber, lyocell fiber, silk short fiber, cashmere, fine wool fiber or acetate short fiber, and the fiber has good comfort.

The outer covering fiber is natural color fiber or colored fiber.

The twist of the core yarn is Z twist or S twist.

The core yarn is natural color core yarn or colored core yarn.

The short fiber yarn is preferably pure cotton yarn, and can also be cotton and other fiber blended yarn.

The preparation method of the conformal knitting yarn comprises the following steps:

(1) opening and mixing the outer-coated fibers, and carding into strips after mixing to obtain outer-coated fiber strips;

(2) drawing the fiber sliver covered with the fiber sliver, and drafting and thinning the fiber sliver into fiber slivers;

(3) the core yarn and the fiber strip are spun by adopting air jet vortex spinning, and are wound into shape-retaining knitting yarn through the cheese.

And (2) spraying a mixed solution of an antistatic agent and water on the outer-coated fiber in the step (1), curing, opening and mixing.

The antistatic agent is preferably an antistatic agent SE-2, and the antistatic agent SE-2 is a polyether quaternary ammonium salt static electricity eliminator produced by Shandong Julong chemical Co.

The mass of the antistatic agent is 1.5-2% of the total mass of the mixed liquid of the antistatic agent and water.

The curing treatment time is 8-24 hours.

And (3) drawing in the step (2) adopts 6-8 drawing combination drafting and 2-3 drawing.

The quantitative ratio of the fiber strands in the step (2) is 15-25g/5 m.

The process conditions of the air-jet vortex spinning in the step (3) are that the spinning speed is 300-550m/min, the total draft multiple is 150-350 times, the back draft multiple is 1.5-6.0 times, the feeding ratio is 0.9-1.1, the crimp ratio is 1.0, the coiling angle is 16 degrees, and the nozzle pressure is 0.45-0.60 MPa.

The device for the shape-retaining knitting yarn comprises a cotton sliver can, the cotton sliver can, a guide frame, a guide bell mouth, a fourth lower roller, a third lower roller, a middle lower roller, a front lower roller, a spinning spindle and a winding bobbin which are sequentially connected, and a yarn reversing device, a core yarn tension rod and an air injection bell mouth are sequentially connected with the front lower roller.

The yarn reversing device is a conventional yarn reversing device which is provided with a bearing and can rotate, and the core yarn is hung on the yarn reversing device and can be unwound in a rotating mode, so that the twist of the core yarn is not increased.

When the core yarn is the chemical fiber filament, the yarn reversing device can prevent the chemical fiber filament from generating twist in the unwinding process, so that the outer-coated fiber can be wrapped more firmly.

The invention adopts the core-spun yarn structure of air-jet vortex spinning with little hairiness, and the core yarn plays roles of skeleton and shape retention. The core yarn is a plurality of F-number chemical fiber filaments such as pure cotton short fiber yarn or un-belted and less network nodes, so that the outer covering fiber and the core yarn can be wrapped conveniently,

the invention realizes core-spun mixed spinning on an air-jet vortex spinning machine.

The invention can ensure the firmness and shape retention of the outer covering fiber by adjusting the proportion of the outer covering fiber and the core yarn in the shape retention knitting yarn.

The preparation method of the conformal knitting yarn comprises the following specific steps:

(1) preparing the wrapping fiber strips: the raw materials are mixed uniformly. Combed cotton fiber, viscose fiber, lyocell fiber, silk staple fiber, cashmere, fine wool fiber, acetate staple fiber or mixed fiber thereof and the like with good comfort are weighed to be single-spun or mixed according to respective proportion, put into a cotton mixing box, set the cotton mixing and opening time according to different requirements, and are opened and mixed. After the mixing is finished, the mixture is conveyed to JWF1211A carding machine for carding into strips. In order to improve spinnability, the fibers with large static electricity, such as acetate short fibers, need to be sprayed with a mixed solution of an antistatic agent for curing and water for curing for 8 to 24 hours, and then weighed, mixed and loosened. The combed cotton fiber, the viscose fiber, the lyocell fiber and the like do not need health preserving treatment. Because the size of the noil is different in cotton carding, in order to ensure the blending proportion, excess ends are required to be punched when the fibers are weighed, and the blending proportion is ensured to be in a qualified range.

(2) The fiber sliver wrapped outside is drawn, the straightening parallelism is further improved, the yarn quality of the air-jet vortex spinning is improved, and the loss is reduced. Drawing adopts 6-8 drawing and drawing, and drawing adopts 2-3 drawing, and the sliver meeting the requirements of air-jet vortex spinning of 15g/5m-25g/5m is spun for air-jet vortex spinning. Excessive drawing easily causes over-mature slivers, accidental drawing, sliver breakage and wool tops of the slivers and influences spinning quality.

(3) The fiber sliver wrapped outside enters a fourth lower roller, a third lower roller, a middle lower roller and a front lower roller in sequence through a sliver guide frame and a sliver guide bell mouth to be drafted and attenuated into a strand.

(4) The core yarn does not generate twist in the yarn reversing device, which is beneficial to fully wrapping the outer wrapping fiber and the core yarn through airflow. The core yarn is guided into a front leather roller jaw through a core yarn tension rod and an air jet horn mouth by a yarn reversing device, is converged with a sliver drafted by a front lower roller, enters a spinning spindle of an air jet vortex spinning machine together for spinning, and is wound into a cone yarn by a winding bobbin.

(5) According to different yarn count requirements, the air jet vortex spinning process comprises the following steps: spinning at a spinning speed of 300-550m/min, a total draft multiple of 150-350 times, a rear draft multiple of 1.5-6.0 times, a feeding ratio of 0.9-1.1, a crimp ratio of 1.0, a winding angle of 16 degrees and a nozzle pressure of 0.45-0.60 MPa.

The invention has the following beneficial effects:

the knitting yarn has little hairiness and good shape retention, and can solve the industrial problems that the hairiness of the knitting yarn affects the weaving efficiency and quality and the shape retention is poor; and the knitted fabric has good comfort, excellent wear resistance and pilling resistance. The core yarn and the outer wrapping fiber can be combined at will, so that the functions of water absorption and quick drying of the knitting yarn, natural crease resistance and no-iron, antibiosis and deodorization, high wear resistance, cutting resistance and the like are realized, and the additional value of the product is further improved.

Drawings

FIG. 1 is a schematic view of the structure of the apparatus of the present invention

In the figure: 1. a sliver can; 2. wrapping the fiber strips; 3. a guide bar frame; 4. a horn mouth of the conducting bar; 5. a fourth bottom roller; 6. a third bottom roller; 7. a middle lower roller; 8. a front bottom roller; 9. a core yarn tension rod; 10. a yarn reversing device; 11. a jet horn; 12. spinning a spindle; 13. and (5) winding the bobbin.

Detailed Description

The present invention is further described below with reference to examples.

Example 1

As shown in fig. 1, the device for shape-retaining knitting yarn comprises a cotton can 1, the cotton can 1, a guide frame 3, a guide bell mouth 4, a fourth lower roller 5, a third lower roller 6, a middle lower roller 7, a front lower roller 8, a spindle 12 and a winding bobbin 13 which are connected in sequence, and a yarn reversing device 10, a core yarn tension rod 9, an air injection bell mouth 11 and the front lower roller 8 are connected in sequence.

In the embodiment, the core yarn adopts 100S pure cotton Z twisted yarn, the yarn twist is 29T/in, the outer covering fiber adopts 100% combed cotton fiber with good comfort, the core-spun yarn spinning is realized on an air-jet vortex spinning machine, and the final resultant yarn is pure cotton core-spun yarn of 40/1S, wherein the mass of the core yarn is 40% of the total mass of the outer covering fiber and the core yarn, and the mass of the outer covering fiber is 60% of the total mass of the outer covering fiber and the core yarn.

The method comprises the following specific steps: the outer-coated fiber sliver 2 in the cotton sliver can 1 enters the guide strip bell mouth 4 through the guide strip frame 3, passes through the fourth lower roller 5, the third lower roller 6, the middle lower roller 7 and the front lower roller 8 in sequence, is drafted into sliver, core yarn is hung on the yarn reversing device 10 to rotate and unwind, then is converged with the outer-coated fiber through the core yarn tension rod 9 and the air-jet bell mouth 11, then enters the spinning spindle 12 together to be spun into yarn, and finally is wound into bobbin yarn through the winding bobbin 13. The main spinning parameters are as follows: the air pressure is 0.45Mpa, the speed is 360m/min, and the feeding ratio is 1.000.

The results of comparing the prior compact spun yarn 40/1S with the yarn 40/1S of example 1 are shown in Table 1.

TABLE 1 comparison of the present compact spun yarn 40/1S with the yarn 40/1S of example 1

As can be seen from Table 1, the hairiness of the pure cotton core-spun yarn more than 3mm is 0.5/10 m, the cloth cover effect of the knitted fabric can be effectively improved, and the shape retention, the pilling resistance and the wear resistance of the knitted fabric are improved.

Compact spinning is an improved ring spinning process, ring spinning is loose outside and tight inside, air jet vortex spinning is loose outside and tight inside, the core-spun yarn structure of example 1 increases the crease resistance of the yarn, the sum of the longitudinal and transverse crease recovery angles of the produced vortex spinning knitted fabric is 12 degrees higher than that of compact spinning, and the crease resistance and shape retention of the fabric are better than that of compact spinning.

Example 2

The apparatus for forming the shape-retaining knitting yarn was the same as in example 1.

In the embodiment, COOLMAX40D filament is adopted as the core yarn, combed cotton fiber is adopted as the outer covering fiber, core-spun yarn spinning is realized on an air-jet vortex spinning machine, and finally the finished yarn is the 40/1S core-spun yarn, wherein the mass of the core yarn is 30% of the total mass of the outer covering fiber and the core yarn, and the mass of the outer covering fiber is 70% of the total mass of the outer covering fiber and the core yarn.

The method comprises the following specific steps: the fiber sliver coated 2 in the sliver can 1 enters a sliver guide bell mouth 4 through a sliver guide frame 3, passes through a fourth lower roller 5, a third lower roller 6, a middle lower roller 7 and a front lower roller 8 in sequence, and is drafted into a sliver; when the core yarn is a filament yarn, the core yarn is favorably unwound by the yarn rewinding device 10, the core yarn can be blown away better when entering the spindle 12, so that the core yarn is better combined with the outer-coated fiber, hung on the yarn rewinding device 10, unwound from the yarn rewinding device 10, converged with the outer-coated fiber through the core yarn tension rod 9 and the air-jet horn mouth 11, then enters the spindle 12 together to be spun into the yarn, and finally wound and formed. The main spinning parameters are air pressure 0.45Mpa, speed 360m/min, and feeding ratio 0.996.

TABLE 2 comparison of the conventional compact spun yarn 40/1S with the yarn 40/1S of example 2

As can be seen from Table 2, the hairiness of the yarn with the thickness of more than 3mm is 1/10 m, so that the shape retention property, the wear resistance and the pilling resistance of the knitted fabric are improved while the comfort of the knitted fabric is ensured.

Through the specific embodiment, the invention has the beneficial effects that the shape retention of the knitted fabric is effectively improved by adjusting the yarn structure and using the air-jet vortex spinning covering yarn structure, and the wear resistance, pilling property, water absorption quick-drying property and the like of the knitted fabric are effectively improved by selecting the core yarn and the covering fiber on the premise of ensuring the comfort of the knitted fabric.

In addition, the invention is not limited to the above list, and various fiber combinations can be freely selected and matched according to the design requirements of the fabric. The invention more fully and reasonably solves the problem that the comfort and the functionality of the clothes are unified, and meets the higher-level requirements of people on the clothes.

In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those specifically described herein, and thus the scope of the present application is not limited by the specific embodiments disclosed above.

Furthermore, the terms "example 1" and "example 2" are only preferred embodiments of the present invention, are used for the purpose of further describing the invention, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more, unless specifically defined otherwise, and is within the scope of the present invention as long as the object of the present invention is achieved based on the same method.

Claims

1. The shape-retaining knitting yarn is characterized by having a covering yarn structure in which a core yarn is covered with a covering fiber, wherein the mass of the covering fiber is 60-90% of the total mass of the covering fiber and the core yarn, the mass of the core yarn is 10-40% of the total mass of the covering fiber and the core yarn, and the core yarn is staple fiber yarn or chemical fiber filament yarn.

2. The shape-retaining knitting yarn according to claim 1, wherein the outer covering fiber is one or more of combed cotton fiber, viscose fiber, lyocell fiber, silk staple fiber, cashmere, fine wool fiber, or acetate staple fiber.

3. The conformable knitting yarn of claim 1 wherein said outer covering fiber is a greige or colored fiber.

4. The shape-retaining knitting yarn according to claim 1, wherein the core yarn has a twist of Z-twist or S-twist, and the core yarn is a natural color core yarn or a colored core yarn.

5. The conformable knitting yarn of claim 1 wherein said staple fiber yarn is a pure cotton yarn.

6. A method of producing a shape-retaining knitting yarn according to any of claims 1 to 5, characterized by comprising the steps of:

7. The method for producing a shape-retaining knitting yarn according to claim 6, wherein the covering fiber in step (1) is sprayed with a mixture of an antistatic agent and water, and subjected to curing treatment, and then subjected to opening and mixing.

8. The method of claim 6, wherein the drawing in step (2) is performed by drawing 6 to 8 combined draft and 2 to 3 passes of drawing, and the yarn weight is 15 to 25g/5 m.

9. The method for preparing the conformal knitting yarn as claimed in claim 6, wherein the process conditions of the air-jet vortex spinning in the step (3) are spinning speed of 300-.

10. A device of the shape-preserving knitting yarn as in any one of claims 1 to 5, comprising a sliver can (1), characterized in that the sliver can (1), a sliver guide frame (3), a sliver guide bell mouth (4), a fourth lower roller (5), a third lower roller (6), a middle lower roller (7), a front lower roller (8), a spindle (12) and a winding bobbin (13) are connected in sequence, and a yarn reversing device (10), a core yarn tension rod (9) and an air jet bell mouth (11) are connected in sequence with the front lower roller (8).