阅读说明：本技术 一种生产高弹力横机产品的工艺 (Process for producing high-elasticity flat knitting machine product ) 是由 何炽斌 何欣洋 于 2020-07-15 设计创作，主要内容包括：本发明公开了一种生产高弹力横机产品的工艺,包括以下步骤：(1)纱线制备：选定芯纱纤维,选择包芯纱的皮纱,选定皮纱的粗纱纺制,完成包芯纱细纱的纺制,再经过倍捻机进行合股,络筒后得到用于横机生产的纱线原料；(2)毛片织造、缝合；(3)成衣水洗后整理：成衣进行第一道入缸水洗,然后出缸再进行脱水,采用特殊的成衣弹力定型工艺,出炉后再将毛衫成衣入缸,在常温水中加入柔软剂进行手感整理,然后出缸进行脱水、烘干、整烫,制得成衣成品。本发明提供的一种生产高弹力横机产品的工艺,是以非氨纶的包芯纱为原料结合成衣水洗后整理工艺,在横机上织造的工艺,得到的非氨纶高弹力毛衫缩水率稳定且弹力和弹性回复率优良。(The invention discloses a process for producing a high-elasticity flat knitting machine product, which comprises the following steps of: (1) preparing yarns: selecting core yarn fiber, selecting sheath yarn of the core-spun yarn, selecting rough yarn spinning of the sheath yarn, finishing spinning of the core-spun yarn, plying through a two-for-one twister, and spooling to obtain a yarn raw material for flat machine production; (2) weaving and sewing the wool sheets; (3) and (3) water washing and after-finishing of ready-made clothes: and (3) putting the ready-made clothes into a cylinder for washing for the first time, then taking the ready-made clothes out of the cylinder, dehydrating the ready-made clothes, adopting a special ready-made clothes elastic shaping process, putting the ready-made clothes into the cylinder after the ready-made clothes are taken out of the furnace, adding a softening agent into normal temperature water for hand feeling finishing, then taking the ready-made clothes out of the cylinder, dehydrating, drying and ironing the ready-made clothes to obtain the finished ready-made clothes. The invention provides a process for producing a high-elasticity flat knitting machine product, which combines non-spandex core-spun yarns as raw materials with a ready-made garment washing finishing process and a weaving process on a flat knitting machine, and the obtained non-spandex high-elasticity sweater has stable shrinkage and excellent elasticity and elastic recovery rate.)

1. A process for producing a high-elasticity flat knitting machine product is characterized by comprising the following steps of:

(1) preparing yarns:

11) selecting low-temperature type polyolefin elastic fiber as core yarn of the core-spun yarn, and preparing roving yarn from sheath yarn of the core-spun yarn;

12) spinning the core-spun yarn on a spinning machine to obtain spun yarn;

13) stranding through a two-for-one twister, and spooling to obtain a yarn raw material for flat machine production;

(2) weaving and sewing the wool pieces: setting weaving density, weaving the core-spun yarns into wool sheets by using a flat knitting machine according to the process requirements of the pattern, the tissue structure, the garment piece size and the gram weight of the ready-made garment, and sewing the wool sheets into the ready-made garment;

(3) and (3) water washing and after-finishing of ready-made clothes:

31) selecting a ready-made clothes industrial washing machine to carry out first washing in a cylinder, and then dehydrating by using a dehydrator after the ready-made clothes industrial washing machine is taken out of the cylinder;

32) after dehydration, treating the ready-made clothes by adopting a special ready-made clothes elastic shaping process, putting the ready-made clothes into a cylinder after treatment, adding a softening agent into normal-temperature water, and performing hand feeling finishing by adopting an immersion method;

33) and taking out of the cylinder, dehydrating, drying and ironing to obtain the finished product of the ready-made clothes.

2. The process for producing a high stretch flat knitting machine product according to claim 1, wherein in the step (1), the low temperature type polyolefin elastic fiber has a thickness gauge of 33 to 75D and a finishing temperature for dimensional stability of 85 to 130 ℃.

3. The process for producing a high stretch flat knitting machine product according to claim 1, wherein in step 11), the raw material ratio of the core spun yarn is: 88-93% of the leather yarn and 7-12% of the low-temperature polyolefin elastic fiber.

4. The process for producing a high stretch flat knitting machine according to claim 1, wherein in step 11), the cover yarn is selected from a pure yarn of any one of natural fiber, cellulose fiber, corn fiber, or a blend of two or more thereof.

5. The process for producing a high elastic flat knitting machine according to claim 4, wherein in step 11), the cover yarn is selected from any one pure yarn of wool fiber, corn fiber, modal fiber, bamboo fiber, pure cotton fiber, or a blend of two or more kinds of fibers.

6. The process for producing a high elastic flat knitting machine product according to claim 1, wherein in the step 12), the spinning frame sets the draft ratio of the core yarn to 1.5 to 2.5 times.

7. The process for producing a high stretch flat knitting machine according to claim 1, wherein in step (2), the weaving density is reduced by 15 to 40% from the density of the normal same yarn count grammage specification.

8. The process for producing a high stretch flat knitting machine according to claim 1, wherein in step 31), the first cylinder washing operation is: putting the ready-made clothes into a cylinder of an industrial washing machine, adding a mixture of a refining agent and a degreasing agent into clear water with the dosage of 3-8g/L, setting the temperature to be 60-98 ℃, and carrying out first washing for 20-50min to complete the full shrinkage of the ready-made clothes containing the polyolefin elastic fiber core-spun yarn.

9. The process for producing a high stretch flat knitting machine product according to claim 1, wherein in step 32), the special garment stretch setting process is operated as follows: putting the dehydrated wet ready-made clothes into a rail type oven machine, and carrying out oven treatment at the temperature of 90-120 ℃ for 60-300 s.

10. The high-elasticity sweater is characterized by being prepared by the process for producing the high-elasticity flat knitting machine product according to any one of claims 1 to 9, wherein the shrinkage rate of the high-elasticity sweater is as low as within 3-6%, and the elongation rate of the high-elasticity sweater is 200-300%.

Technical Field

The invention relates to the technical field of manufacturing of sweaters of textile flat knitting machines, in particular to a process for producing a high-elasticity flat knitting machine product.

Background

Because the sweater clothes have natural elasticity formed by self organization structures, have the characteristics of unique style, rich styles and capability of quickly responding to the market demand, and are popular with enterprises and consumers all the time. However, if the sweater is worn for a long time, the sweater can be shortened, lose elasticity and deform, consumers feel that various methods are thought for restoring the elasticity of the sweater, but the effect is not good, mainly because the use of elastic raw materials is limited due to the particularity of the production mode of the sweater.

As is known, the ready-made clothes have high elasticity and elastic recovery rate mainly depending on elastic fiber materials in the fabric, and the elastic fiber used in the traditional high-elasticity fabric, whether polyurethane fiber (spandex) or polyether ester elastic fiber, can obtain high elasticity and elastic recovery rate and simultaneously can ensure the dimensional stability and the shrinkage rate of the fabric through high-temperature shaping. However, the sweater is formed by directly producing the ready-made clothes cloth pieces on a flat knitting machine by using yarns, sewing the ready-made clothes pieces into ready-made clothes, and then washing and ironing the ready-made clothes. The production of the high-elasticity sweater just lacks the high-temperature shaping process between the cloth piece and the ready-made clothes, so that spandex elastic fibers can not be generally selected when selecting the sweater material, and the requirements of the high-elasticity sweater such as shrinkage, curling, dimensional stability and the like are difficult to ensure.

In the prior art, a method for improving the elasticity by stranding single yarns into high-twist plied yarns by using a method of twisting in the same direction is adopted, but the high-twist sweater has over-hard hand feeling and can cause twisting; the elastic sweater is also produced by using a method of firstly weaving spandex core-spun yarns produced by optimizing the spandex draft ratio and then ironing the garment by a high-temperature die-covering mode, but the dimensional stability and the water shrinkage rate of the whole batch of products are difficult to stabilize during batch production; there is also a method for improving elasticity by plying single yarns with different boiling water shrinkage rates in a non-drafting and non-core-covering mode, but the dyeing problem of mass production is difficult to solve due to the use of polyester filaments needing high-temperature dyeing, and the elasticity and the elastic recovery rate of the finished sweater are also small and far less than the high elasticity of spandex due to the adoption of the non-drafting and non-core-covering mode during spinning, and meanwhile, the polyester product belongs to chemical fibers, cannot be biodegraded and is not beneficial to sustainable development of the environment.

Therefore, how to produce a high-elasticity sweater product with stable shrinkage and without losing elasticity and deformation leads consumers to enjoy the sweater which is more comfortable, easier to manage and more environment-friendly, and becomes a problem to be solved by related personnel in the field.

Disclosure of Invention

In view of the above, the present invention provides a method for preparing a high-elasticity flat knitting machine product, which combines a non-spandex core-spun yarn as a raw material with a ready-made garment finishing process after washing, and weaves a non-spandex high-elasticity sweater with stable shrinkage and excellent elasticity and elasticity recovery rate on the flat knitting machine.

In order to achieve the purpose, the invention adopts the following technical scheme:

a process for producing high-elasticity flat knitting machine products comprises the following steps:

(1) preparing yarns:

11) selecting low-temperature type polyolefin elastic fiber as core yarn of the core-spun yarn, and preparing roving yarn from sheath yarn of the core-spun yarn;

12) spinning the core-spun yarn on a spinning machine to obtain spun yarn;

13) stranding through a two-for-one twister, and spooling to obtain a yarn raw material for flat machine production;

(2) weaving and sewing the wool pieces: setting weaving density, weaving the core-spun yarns into wool sheets by using a flat knitting machine according to the process requirements of the pattern, the tissue structure, the garment piece size and the gram weight of the ready-made garment, and sewing the wool sheets into the ready-made garment;

(3) and (3) water washing and after-finishing of ready-made clothes:

31) selecting a ready-made clothes industrial washing machine to carry out first washing in a cylinder, and then dehydrating by using a dehydrator after the ready-made clothes industrial washing machine is taken out of the cylinder;

32) after dehydration, treating the ready-made clothes by adopting a special ready-made clothes elastic shaping process, putting the ready-made clothes into a cylinder after treatment, adding a softening agent into normal-temperature water, and performing hand feeling finishing by adopting an immersion method;

33) and taking out of the cylinder, dehydrating, drying and ironing to obtain the finished product of the ready-made clothes.

Preferably, in step 11), the thickness specification of the low-temperature type polyolefin elastic fiber is 33-75D, and the finishing temperature of the dimensional stability is 85-130 ℃. Further, the thickness specification of the low-temperature type polyolefin elastic fiber is 42D, and the finishing temperature of the dimensional stability is 120 ℃.

The technical effect of adopting the technical scheme is as follows: after the selected low-temperature type polyolefin elastic fiber is subjected to low-temperature wet shrinkage setting within the range of 90-120 ℃, the shrinkage and elastic recovery performance of the high-elasticity sweater can be stable.

Preferably, in step 11), the raw material ratio of the core-spun yarn is: 88-93% of the leather yarn and 7-12% of the low-temperature polyolefin elastic fiber.

The technical effect of adopting the technical scheme is as follows: the core-spun yarn prepared by adopting the raw material proportion adopts the finishing process after the ready-made clothes are washed, so that the water shrinkage rate of the non-spandex high-elasticity sweater woven on a flat knitting machine is more stable and the elasticity performance is more excellent.

Preferably, in step 11), the leather yarn is selected from any one of pure spinning of natural fiber, cellulose fiber and corn fiber, or a blended spinning of more than two.

Preferably, in step 11), the cover yarn is selected from any one pure spinning of wool fiber, corn fiber, modal fiber, bamboo fiber and pure cotton fiber, or a blend of more than two.

The technical effect of adopting the technical scheme is as follows: all fibers of the leather yarns can be biodegraded by 100 percent so as to ensure the environmental protection of the technical product.

Preferably, the yarn covering core at least comprises the following raw materials in a preferable weight ratio:

93% of wool fiber and 7% of low-temperature polyolefin elastic fiber;

88% of corn fiber and 12% of low-temperature type polyolefin elastic fiber;

90% of Modal fiber and 10% of low-temperature polyolefin elastic fiber;

90% of bamboo fiber and 10% of low-temperature polyolefin elastic fiber;

90% of pure cotton fiber and 10% of low-temperature polyolefin elastic fiber;

18% of wool fiber, 72% of corn fiber and 10% of low-temperature polyolefin elastic fiber;

18% of Modal fiber, 72% of corn fiber and 10% of low-temperature polyolefin elastic fiber;

45% of pure cotton fiber, 45% of corn fiber and 10% of low-temperature polyolefin elastic fiber;

72% of bamboo fiber, 18% of corn fiber and 10% of low-temperature polyolefin elastic fiber.

Preferably, in step 12), the core spun yarn is spun using the twist of a normal sweater yarn.

The technical effect of adopting the technical scheme is as follows: the core-spun yarn does not need to use a high-twist process, and can ensure the plump hand feeling of the sweater and the wool tops cannot be twisted by only selecting the twist of the normal sweater yarn.

Preferably, in step 12), the spinning frame sets the draft ratio of the core yarn to 1.5 to 2.5 times. Further, the spinning machine sets the draft ratio of the core yarn to 2.0 times.

Preferably, in step (2), the weave density is reduced by 15-40% from that of a normal same yarn grammage specification. Further, the weaving density is reduced by 25% compared to the density of the normal same yarn count grammage specification.

The technical effect of adopting the technical scheme is as follows: the density reduction value disclosed by the invention needs to be designed and determined by combining the set value of the finishing process after water washing, the shrinkage rate of ready-made clothes and the value of elastic elongation, and is realized by reducing the weaving density, wherein the weaving density reduction range is 15-40%, and the non-spandex high-elasticity sweater with stable shrinkage rate and excellent elasticity and elastic recovery rate is obtained.

Preferably, in step 31), the first in-cylinder water washing operation is: putting the ready-made clothes into a cylinder of an industrial washing machine, adding a mixture of a refining agent and a degreasing agent into clear water with the dosage of 3-8g/L, setting the temperature to be 60-98 ℃, and carrying out first washing for 20-50min to complete the full shrinkage of the ready-made clothes containing the polyolefin elastic fiber core-spun yarn.

Preferably, in step 32), the softener is a multi-copolymer block modified silicone softener, the dosage is 3-5% (percentage to the weight of the fabric), the dipping time is 5-20min,

preferably, in step 32), the special garment elastic setting process is operated as follows: and putting the dehydrated wet ready-made clothes into a rail-type oven machine, and carrying out oven treatment at the temperature of 90-120 ℃ for 60-300 s.

The technical effect of adopting the technical scheme is as follows: the finishing process of the ready-made sweater after washing is low-temperature wet-state shrinkage sizing finishing, breaks through the traditional finishing process (washing, dehydration, drying and ironing) of the ready-made sweater, adopts the steps of firstly putting the ready-made sweater into a cylinder to wash at a higher temperature, then dehydrating, then carrying out a low-temperature oven process, then putting the ready-made sweater into the cylinder to finish hand feeling finishing, then dehydrating, drying and ironing to finish ready-made sweater forming, and after low-temperature wet-state shrinkage sizing is carried out within the range of 90-120 ℃, the shrinkage and elastic recovery performance of the high-elasticity sweater can be stable.

The invention also provides a non-spandex high-elasticity sweater prepared by the preparation method of the high-elasticity flat knitting machine product, the shrinkage rate of the non-spandex high-elasticity sweater is as low as within 3-6%, and the elongation rate of the elastic recovery performance of the non-spandex high-elasticity sweater is 200-300%.

The technical effect of adopting the technical scheme is as follows: the sweater piece fabric is not elastic woven cloth and weft-knitted cloth of covering yarn containing spandex or covering yarn containing polyolefin elastic fiber, but is a non-spandex high-elasticity sweater which is formed by weaving a wool piece by a flat knitting machine, stitching the wool piece into a garment and then washing and ironing the garment by a new process, and is different from the traditional tatting or weft-knitted elastic fabric which needs high-temperature setting finishing at more than 170 ℃.

The invention can be applied to the processing of products such as female sweaters, male sweaters, children's clothes sweaters, baby and child quilts, flat knitting machine fashionable dresses and the like, can solve the problems of unstable shrinkage, low elasticity, easy rebound loss and deformation and the like commonly existing in the prior sweater products, and ensures that consumers enjoy high-elasticity flat knitting machines which are more comfortable to wear, easier to manage and more environment-friendly.

According to the technical scheme, compared with the prior art, the invention discloses the colored non-woven tissue and the preparation method thereof, and the colored non-woven tissue has the following technical effects:

(1) the invention combines non-spandex core-spun yarns as raw materials with a ready-made garment water-washing finishing process to weave a non-spandex high-elasticity sweater with stable shrinkage and excellent elasticity and elastic recovery rate on a flat knitting machine, wherein the shrinkage of the non-spandex high-elasticity sweater can be as low as within 3-6%, the elastic recovery performance of the non-spandex high-elasticity sweater is stable, and the elongation can be as high as 200-300%.

(2) All fibers of the covering yarn leather yarn selected by the invention can be biodegraded by 100 percent so as to ensure the environmental protection of the technical product, and after low-temperature wet-state shrinkage sizing is carried out within the range of 90-120 ℃ by adopting low-temperature wet-state shrinkage sizing finishing, the shrinkage and elastic recovery performance of the high-elasticity sweater can be stable; and according to the gram weight and thickness requirements of the ready-made clothes, the shrinkage and elastic recovery performance of the high-elasticity sweater are controlled by combining the core-spun yarn raw material process and the ready-made clothes water washing after-finishing process and reducing the weaving density.

(3) The invention combines non-spandex core-spun yarn as a raw material with a ready-made garment water washing finishing process, solves the industrial problem that a flat knitting machine can be used for producing a high-elasticity sweater finished product without using a spandex raw material, and the high-elasticity sweater has stable shrinkage, high elasticity, no loss of elasticity and deformation, smooth sweater without curling, full and soft hand feeling, and can be used by both boys and girls to enjoy more comfortable, easier-to-handle and more environment-friendly sweater ready-made garments, thereby having wide market application prospect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a process flow diagram for producing a high stretch flat knitting machine product according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a process of a high-elasticity flat knitting machine product, which comprises the following steps of: the method is characterized by comprising the following steps of selecting core yarn fibers, selecting sheath yarns of core spun yarns, selecting rough yarn spinning of the sheath yarns, spinning spun yarns of the core spun yarns, plying by a two-for-one twister, spooling, weaving, stitching wool pieces, washing for the first time, dewatering for the first time, shaping at low temperature by an oven, washing for the second time of ready-made clothes, dewatering for the second time, drying by a roller, ironing and packaging.

In order to optimize the technical scheme and the core-spun yarn process, the leather yarn is made of pure spinning or blending of natural fibers or cellulose fibers or corn fibers, and the core yarn does not use traditional spandex but selects low-temperature polyolefin elastic fibers with elastic performance similar to that of the spandex; the core-spun yarn process belongs to a process for drafting core yarns, and the drafting ratio of the optimized core yarns is as low as 1.5-2.5 times; all fibers of the covering yarn sheath yarn can be degraded by 100 percent so as to ensure the environmental protection of the technical product.

In order to optimize the technical scheme, the core-spun yarn does not need to use a high-twist process, and only needs to select the twist of the normal sweater yarn for spinning, so that the plump hand feeling and the wool tops of the sweater can be ensured not to be twisted.

In order to optimize the technical scheme, the non-spandex high-elasticity sweater is formed by weaving a wool top by a flat knitting machine, sewing the wool top into a garment, and washing and ironing the garment by a new process; different from the traditional tatting or weft knitting elastic cloth which needs high-temperature setting finishing at more than 170 ℃, the high-elasticity sweater is woven by using core-spun yarns as raw materials on a flat knitting machine, the fabric does not need high-temperature setting finishing at more than 170 ℃, the flat knitting machine knitted pieces are stitched into ready-made clothes and then the ready-made clothes are washed and then finished, and the high-elasticity sweater which is stable in shrinkage rate and excellent in elasticity and elastic recovery rate and is not spandex is obtained.

In order to optimize the technical scheme, after the low-temperature type polyolefin elastic fiber is subjected to low-temperature wet shrinkage setting within the range of 90-120 ℃, the shrinkage and elastic recovery performance of the high-elasticity sweater can be stable.

In order to optimize the technical scheme, the finishing process after washing the ready-made clothes is low-temperature wet shrinkage sizing finishing, breaks through the traditional finishing process (washing, dewatering, drying and ironing) after washing the ready-made clothes of the sweater, firstly enters a cylinder to be washed at a higher temperature, then is dewatered, then is subjected to a low-temperature oven process, then enters the cylinder to be subjected to hand feeling finishing, and then is dewatered, dried and ironed to finish the forming of the ready-made clothes; the washing temperature of the finishing process after the ready-made clothes are washed is 60-98 ℃, and the low-temperature oven temperature is 90-120 ℃.

In order to optimize the technical scheme, the shrinkage and the stability of the elastic recovery performance of the high-elasticity sweater are controlled by reducing the weaving density according to the gram weight and the thickness requirement of ready-made clothes and combining a core-spun yarn raw material process and a ready-made clothes washing after-finishing process during weaving by a flat knitting machine, wherein the weaving density is reduced by 15-40%. The shrinkage rate of the high-elasticity sweater can be reduced to be within 3-6%, the elastic recovery performance of the high-elasticity sweater is stable, and the elongation rate can be as high as 200-300%.