CN113718410B - Double-component polyester cotton-like elastic knitted fabric and preparation method thereof - Google Patents

Abstract

The present invention provides a two-component polyester cotton-like elastic knitted fabric and a preparation method thereof. The fabric structure is a modified Roman cloth structure. The fabric is formed by interweaving two-component cotton-like elastic composite yarn and polyester filament. The two-component cotton-like elastic composite yarn is a stretched and deformed yarn formed by processing PTT/PET composite yarn and full-dull ordinary polyester POY. The present application uses two-component cotton-like elastic composite yarn and conventional polyester to interweave, so that the surface of the fabric presents a unique striped texture that combines roughness and delicacy. At the same time, the characteristics brought by the raw materials make the fabric have excellent dimensional stability, stain resistance, wrinkle resistance, wear resistance and easy dyeing. The fabric containing the two-component cotton-like elastic composite yarn, coupled with the flat-width washing process and sanding process added in the production process, makes the fabric closer to the fluffy and soft touch of cotton material, and is also closer to cotton material in appearance.

Description

A two-component polyester cotton-like elastic knitted fabric and a preparation method thereof

Technical Field

The invention relates to the technical field of textiles, and in particular to a two-component polyester cotton-like elastic knitted fabric and a preparation method thereof.

Background Art

With the continuous development of science and technology, textile fabrics that meet people's different needs emerge in an endless stream to meet the needs of consumers and play an increasingly important role in people's daily lives. In the current era of rapid productivity, chemical fiber fabrics have gradually become the mainstream fabric fibers for clothing people wear. There are more and more types of chemical fiber components, so the functions of the fabrics formed are also innumerable.

However, various fabrics available on the market either focus on their functionality and lack fashionability; or focus on their fashionability and have various functional defects, such as not being soft enough, poor skin-friendliness, and not having health care functions. For example, traditional synthetic fiber fabrics have poor moisture absorption, poor comfort, and poor air permeability, while cellulose fabrics are prone to wrinkling and deformation, poor shrinkage, poor strength, and easy whitening after washing; conventional fabrics have no elasticity and poor stretch recovery; fabrics containing bare ammonia have high requirements for weaving and dyeing processes, the fabrics are thick and heavy, and the air permeability is insufficient, and the spandex is very likely to break during use, resulting in poor practicality of the fabrics and affecting the appearance. In addition, spandex core-spun yarn stretch fabrics have many advantages, but also have disadvantages, such as being difficult to handle during fabric and printing and dyeing processing, easily causing fabric curling and wrinkles, and it is difficult to achieve both good elasticity and good dimensional stability, while conventional cotton-like fiber fabrics generally have poor elasticity and insufficient stretch recovery performance, resulting in reduced wearing comfort; the appearance style of conventional fabrics is generally stereotyped in the market, which makes consumers feel dull.

In order to solve the above technical problems, this application is specially proposed.

Summary of the invention

The technical problem solved by the present invention is that in the prior art, imitation cotton fiber fabrics generally have poor elasticity and insufficient stretch recovery performance, which leads to reduced wearing comfort and a stereotyped appearance of the fabric, which easily makes consumers feel dull.

The invention designs a two-component polyester cotton-like elastic knitted fabric and a preparation method thereof, so as to provide a fabric which can have the advantages of cotton and polyester and avoid their disadvantages.

In order to solve the above problems, the present invention discloses a two-component polyester imitation cotton elastic knitted fabric, wherein the fabric structure is a modified Roman cloth structure, and the fabric is formed by interweaving two-component cotton-like elastic composite yarn and polyester filament, and the two-component cotton-like elastic composite yarn is a stretched deformed yarn formed by processing PTT/PET composite yarn and full-dull ordinary polyester POY.

The composite yarn formed by the parallel composite spinning of PTT fiber and PET fiber has a permanent main spiral structure, which not only has excellent deformation and rebound capabilities like a spring, but also has excellent dimensional stability, stain resistance, wrinkle resistance, wear resistance and easy dyeing, overcoming the problems of large friction coefficient of spandex core-spun yarn commonly used in the prior art, easy to produce unexpected elongation and uneven tension during the manufacturing process, and easy to generate static electricity, hygroscopicity and poor dyeability during the manufacturing process. However, PTT/PET composite yarn has the disadvantage of too strong polyester feel. It is processed with full-dull ordinary polyester with different boiling shrinkage through POY to make stretched and deformed yarn, which can separate the fibers of the yarn into a fluffy state, so that the fabric has the appearance and feel of cotton, and its cost is much lower than cotton material.

Furthermore, the thickness ratio of the cotton-like elastic composite yarn to the polyester filament is in the range of 2:3 to 5:6.

This arrangement allows the cotton-like elastic composite yarn to occupy a larger proportion, so that the finished fabric has an appearance and feel closer to cotton, and avoids excessive polyester filament content resulting in a noticeable polyester feel.

Furthermore, the yarn count of the two-component cotton-like elastic composite yarn ranges from 50D to 180D, and the yarn count of the polyester filament ranges from 100D to 300D.

This arrangement makes the thickness of the two-component cotton-like elastic composite yarn and the polyester filament have a certain difference, and the stripes on the surface of the fabric formed by knitting have a certain concave-convex structure, so that the fabric feels better.

Furthermore, the fabric is woven in an 8-way cycle, wherein the 1st, 2nd, 3rd, 4th, 5th and 6th ways are connected with two-component cotton-like elastic composite yarns, and the 7th and 8th ways are connected with polyester filaments.

This setting can form wider rough stripes and narrower delicate stripes on the fabric, wherein the rough stripes are patterns formed on the surface of the fabric by two-component cotton-like elastic composite yarns, and the delicate stripes are patterns formed on the surface of the fabric by polyester filaments, thereby making the produced fabric form a unique striped texture, improving the fashionability of the product and more easily attracting the attention of consumers.

Furthermore, the knitting needles are arranged in the order of AB on the upper needle disc and BA on the lower needle disc, wherein A represents high heel needles and B represents low heel needles. The 1st and 2nd routes are knitted with double rib structure, that is, the high heel needles of the needle disc and the lower needle cylinder on the 1st route are all involved in knitting, and the low heel needles are all not involved in the work; the needle disc and the low heel needles of the lower needle cylinder on the 2nd route are all involved in knitting, and the high heel needles are all not involved in the work; the needle disc knitting needles on the 3rd route are not involved in the work, and the knitting needles of the lower needle cylinder are all involved in the knitting; the knitting needles of the lower needle cylinder on the 4th route are not involved in the work, and the knitting needles of the upper needle disc are all involved in the knitting; the 5th and 6th routes are knitted with double rib structure, that is, the high heel needles of the needle disc and the lower needle cylinder on the 5th route are all involved in knitting, and the low heel needles are all not involved in the work; the needle disc and the low heel needles of the lower needle cylinder on the 6th route are all involved in knitting, and the low-high needles are all not involved in the work; the needle disc knitting needles on the 7th route are not involved in the work, and the knitting needles of the lower needle cylinder are all involved in the knitting; the knitting needles of the lower needle cylinder on the 8th route are not involved in the work, and the knitting needles of the upper needle disc are all involved in the knitting.

This arrangement forms a pulling structure between the upper and lower needle cylinders, which is beneficial to uniform force between the various parts of the woven fabric, helps to keep the fabric flat, avoids curling and the like, and makes the patterns on both sides of the fabric the same. Since the yarns of routes 7 and 8 are different from those of other routes, the texture on the surface of the fabric is clear and natural.

The present invention also discloses a method for preparing a fabric, which is used to prepare the above-mentioned two-component polyester cotton-like elastic knitted fabric, and the method comprises:

S1, yarn count preparation;

S2, fabric weaving;

S3, dyeing and finishing process.

Furthermore, the step S3 includes:

S31, open width washing;

S32, blank pre-forming;

S33, staining;

S34, sanded;

S35, complex shaping.

Furthermore, the step S31 includes: placing the fabric in an open-width and flat state into an open-width machine for washing, with the washing temperature being 60° C. to 80° C. and the machine speed being 15-25 m/min.

Adding the step of flat-width washing before pre-setting allows the fabric to fully shrink after being heated, making it less likely to produce creases and wrinkles, thereby obtaining a better fabric appearance and feel.

Further, the step S33, dyeing comprises: immersing the pre-shaped grey cloth into a dyeing vat, with a bath ratio of 1:10, using disperse dyes, dyeing with segmented temperature control, and performing reduction cleaning after dyeing; wherein the disperse dyes comprise: 2-3% dye, 2-3g/L leveling agent, 1.5-3g/L chelating dispersant, 3-5g/L sodium acetate and HAc (pH 4.5-5); the segmented temperature control process comprises: heating from room temperature to 85°C at 1.5°C/min, keeping the temperature for 5min, then continuing to heat to 120°C at 1.5°C/min, keeping the temperature for 40-50 minutes, and cooling to 70°C at 2°C/min; the cleaning solution for the reduction cleaning comprises: 2.5g/L _Na2CO3 and 2.5g/L _hydrosulfite .

Furthermore, the step S34 includes: sanding the fabric dyed in the step S33 on a carbon sanding machine, wherein the sanding speed is 16 to 20 m/min and the number of sanding passes is 2 times.

This setting can grind the fibers on the surface of the fabric into a fluffy state, making the surface of the fabric fluffier and softer, closer to the feel of cotton, and more skin-friendly.

The bicomponent polyester cotton-like elastic knitted fabric and the preparation method thereof described in the present application have the following advantages:

First, the bi-component polyester imitation cotton elastic knitted fabric described in the present application is interwoven with bi-component imitation cotton elastic composite yarn and conventional polyester, so that the fabric has an appearance and feel close to cotton;

Second, the bi-component polyester cotton-like elastic knitted fabric of the application, which is a fabric interwoven with bi-component polyester elastic fiber and conventional polyester, has excellent dimensional stability, stain resistance, wrinkle resistance, abrasion resistance and easy dyeing;

Third, the bi-component polyester elastic knitted fabric described in the present application is a fabric interwoven with conventional polyester to form a unique striped texture that combines roughness and fineness, which is more fashionable and easier to attract users;

Fourth, the present application adds a flat-width washing process before dyeing and pre-setting to allow the blank to shrink fully, and then adds a sanding process after pre-setting, so that the fabric provided by the present application is closer to the fluffy and softness of cotton and more skin-friendly.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a diagram showing the arrangement of knitting needles of a two-component polyester cotton-like elastic knitted fabric according to an embodiment of the present invention;

FIG2 is a triangular arrangement diagram of the bicomponent polyester cotton-like elastic knitted fabric according to an embodiment of the present invention;

FIG3 is a knitting diagram of a bi-component polyester cotton-like elastic knitted fabric according to an embodiment of the present invention;

FIG4 is a pattern effect diagram of the bi-component polyester cotton-like elastic knitted fabric according to an embodiment of the present invention;

FIG. 5 is a physical surface diagram of the bi-component polyester cotton-like elastic knitted fabric according to an embodiment of the present invention.

DETAILED DESCRIPTION

In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

A two-component polyester cotton-like elastic knitted fabric and a preparation method thereof according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

A two-component polyester cotton-like elastic knitted fabric, the fabric structure is a modified Roman cloth structure, the fabric is formed by interweaving two-component cotton-like elastic composite yarn and polyester filament, and the two-component cotton-like elastic composite yarn is a stretched deformation yarn formed by processing PTT/PET composite yarn and full-dull ordinary polyester POY. Among them, the PTT fiber is polypropylene terephthalate, and the PET fiber is polyethylene terephthalate. The PTT fiber is a semi-crystalline thermoplastic polyester, and its unique molecular chain structure brings high resilience, and has the advantages of easy dyeing, high color fastness, and good chlorine resistance. The PET fiber has stable size and shape, good stiffness, and is not easy to shrink. The composite yarn formed by the parallel composite spinning of PTT fiber and PET fiber has a permanent main spiral structure, so that it not only has the excellent deformation and rebound ability like a spring, but also has excellent dimensional stability, anti-fouling, anti-wrinkle, wear resistance and easy dyeing, overcoming the problems of the spandex core-spun yarn commonly used in the prior art, such as large friction coefficient, easy to produce accidental elongation and tension during the manufacturing process. The PTT/PET composite yarn has the disadvantage of being too polyester-feeling. By processing it with ordinary full-dull polyester of different boiling shrinkage through POY to make a stretched and deformed yarn, the fibers of the yarn can be separated into a fluffy state, so that the fabric has the appearance and feel of cotton, and its cost is much lower than that of cotton. The Roman cloth structure is changed to make the front and back patterns of the fabric the same. By interweaving the imitation cotton elastic composite yarn and the polyester filament, different stripes are formed on the front and back of the fabric, which is more conducive to attracting consumers' attention and helping to promote its use. It should be noted that in this embodiment, the Roman cloth structure is a plain weft needle structure + double rib structure.

As an embodiment of the present invention, the ratio of the cotton-like elastic composite yarn to the polyester filament is 3:1, and the ratio of the thickness of the cotton-like elastic composite yarn to the polyester filament is in the range of 2:3 to 5:6. This setting can make the cotton-like elastic composite yarn occupy a larger proportion, so that the finished fabric has an appearance and feel that is closer to cotton material, avoiding excessive polyester filament content resulting in an obvious polyester feel. At the same time, the fabric has better wearing properties than cotton material, such as dimensional stability, stain resistance, wrinkle resistance, wear resistance and easy dyeing, which are greatly improved compared with existing cotton material. In addition, the cotton-like elastic composite yarn and the polyester filament form stripes of different styles, which significantly improves the fashion of the fabric and is conducive to attracting users. It should be noted that the ratio of the cotton-like elastic composite yarn to the polyester filament can also be other ratios, so that cotton-like elastic fabrics of different styles can be obtained, which is no longer limited here.

As an embodiment of the present invention, the yarn count of the two-component cotton-like elastic composite yarn ranges from 50D to 180D, and the yarn count of the polyester filament ranges from 100D to 300D. This setting makes the thickness of the two-component cotton-like elastic composite yarn and the polyester filament have a certain difference, and the stripes on the surface of the fabric formed by knitting have a certain concave-convex structure, which makes the fabric feel better.

In this embodiment, as shown in Figure 4, the fabric is woven in an 8-way cycle, wherein 1, 2, 3, 4, 5, and 6 ways are connected with two-component cotton-like elastic composite yarns, and 7 and 8 ways are connected with polyester filaments. Since the raw materials used in weaving 7 and 8 are different from those in other ways, a significant contrast pattern is formed on the surface of the fabric. In addition, the two-component cotton-like elastic composite yarns are woven continuously in multiple ways, thereby forming wider rough stripes and narrower delicate stripes on the fabric. The rough stripes are patterns formed on the surface of the fabric by the two-component cotton-like elastic composite yarns, and the delicate stripes are patterns formed on the surface of the fabric by the polyester filaments. As a result, the produced fabric forms a unique striped texture, enhances the fashionability of the product, and is more likely to attract the attention of consumers.

In this embodiment, the knitting machine is a weft knitting circular knitting machine, as shown in Figures 1 to 3, and the knitting needles are arranged in the order of upper needle disc AB and lower needle disc BA during fabric knitting, where A represents high heel needles and B represents low heel needles, and the needle pitch is 20G to 40G. This arrangement forms a pulling structure between the upper and lower needle cylinders, which is conducive to uniform force between the various parts of the knitted fabric, helps to keep the fabric flat, and avoids curling and the like.

According to the arrangement order of the knitting needles, the working conditions of the knitting needles when knitting the fabric are as follows: the 1st and 2nd routes are knitted with double rib structure, that is, the high heel needles of the needle disc and the lower needle cylinder on the 1st route are all involved in the knitting, and the low heel needles are all not involved in the work; the needle disc and the low heel needles of the lower needle cylinder on the 2nd route are all involved in the knitting, and the high heel needles are all not involved in the work; the needle disc knitting needles on the 3rd route are not involved in the work, and the lower needle cylinder knitting needles are all involved in the knitting; the lower needle cylinder knitting needles on the 4th route are not involved in the work, and the upper needle disc knitting needles are all involved in the knitting; the 5th and 6th routes are knitted with double rib structure, that is, the high heel needles of the needle disc and the lower needle cylinder on the 5th route are all involved in the knitting, and the low heel needles are all not involved in the work; the needle disc and the low heel needles of the lower needle cylinder on the 6th route are all involved in the knitting, and the low-high needles are all not involved in the work; the needle disc knitting needles on the 7th route are not involved in the work, and the lower needle cylinder knitting needles are all involved in the knitting; the lower needle cylinder knitting needles on the 8th route are not involved in the work, and the upper needle disc knitting needles are all involved in the knitting. This arrangement makes the patterns on both sides of the fabric the same, and because the yarns of routes 7 and 8 are different from those of the other routes, an intermittent striped structure is formed on the surface of the fabric. The two-component cotton-like elastic composite yarn forms a rough striped pattern on the surface of the fabric, and the polyester filament forms a fine striped pattern on the surface of the fabric, thereby forming wider rough stripes and narrower fine stripes on the surface of the fabric, making the texture on the surface of the fabric clear and natural.

In some of the embodiments, the ratio of PTT fiber to PET fiber in the PTT/PET composite yarn is in the range of 1:1 to 3:2. In this setting, the cost of the PTT/PET composite yarn is much lower than the cost of the fabric, but the permanent main spiral structure formed by it has all the advantages of PTT fiber and PET fiber, so that the performance of the final fabric is better than the existing cotton material. Preferably, the ratio of PTT fiber to PET fiber in the PTT/PET composite yarn is 3:2, at which time the best composite yarn performance can be obtained.

Preferably, the ratio of PTT/PET composite yarn to full-dull ordinary polyester in the two-component cotton-like elastic composite yarn is in the range of 1:1 to 2:3. This setting can effectively reduce the polyester feel of the PTT/PET composite yarn, so that the two-component cotton-like elastic composite yarn has the appearance and feel of cotton material. Preferably, the ratio of PTT/PET composite yarn to full-dull ordinary polyester in the two-component cotton-like elastic composite yarn is 2:3, at this time, the best two-component cotton-like elastic composite yarn performance can be obtained.

Example 2

A method for preparing a fabric, the method is used to prepare the fabric described in the above embodiment 1, the preparation method comprising the steps of:

S1, yarn count preparation;

S2, fabric weaving;

S3, dyeing and finishing process.

Furthermore, in step S1, the yarn count preparation process includes: selecting a two-component cotton-like elastic composite yarn and a polyester filament as a weaving material.

Preferably, in step S1, a two-component cotton-like elastic composite yarn with a thickness of 50D-180D and a polyester filament with a thickness of 100D-300D are selected as the weaving materials.

In the fabric shown in FIG5 , the thickness of the two-component cotton-like elastic composite yarn is 125D, and the thickness of the polyester filament is 150D. The fabric can obtain an appearance and feel similar to that of cotton, and its wearing performance is much higher than that of cotton fabric.

Furthermore, in step S2, the fabric is woven using a weft knitting circular machine with a needle gauge of 20G to 40G.

Specifically, in step S2, the fabric weaving process includes: the knitting needle arrangement mode of the fabric knitting is that the upper needle disc is arranged in AB sequence, and the lower needle disc is arranged in BA sequence, wherein A represents high heel needles, and B represents low heel needles, and the knitting needle working conditions of the fabric knitting are as follows: the 1st and 2nd routes knit double rib structures, that is, the high heel needles of the needle disc and the lower needle cylinder on the 1st route are all involved in knitting, and the low heel needles are not involved in the work; the needle disc and the low heel needles of the lower needle cylinder on the 2nd route are all involved in knitting, and the high heel needles are not involved in the work; the needle disc knits the needles on the 3rd route The 4th needle cylinder knitting needles do not participate in the work, and all the lower needle cylinder knitting needles participate in the knitting; the 5th and 6th needle cylinder knitting needles do not participate in the work, and all the upper needle dial knitting needles participate in the knitting; the 5th and 6th knit double rib structure, that is, the upper needle dial and the high heel needles of the lower needle cylinder on the 5th route all participate in the knitting, and the low heel needles do not participate in the work; the upper needle dial and the low heel needles of the lower needle cylinder on the 6th route all participate in the knitting, and the low high needles do not participate in the work; the needle dial needles on the 7th route do not participate in the work, and all the lower needle cylinder knitting needles participate in the knitting; the 8th needle cylinder knitting needles do not participate in the work, and all the upper needle dial needles participate in the knitting.

Furthermore, in step S2, the first, second, third, fourth, fifth and sixth routes are woven with 50D-180D two-component cotton-like elastic composite yarns; the seventh and eighth routes are woven with 100D-300D polyester filaments, wherein the thickness ratio of the two-component cotton-like elastic composite yarns to the polyester filaments is 2:3 to 5:6.

Furthermore, the step S3, the dyeing and finishing process comprises the steps of:

S31, open width washing;

S32, blank pre-forming;

S33, staining;

S34, sanded;

S35, complex shaping.

Among them, the step S31, open-width washing includes: the fabric woven in the step S2 is put into the open-width machine for washing in a flat state, the temperature is 60℃～80℃, and the speed is 15～25m/min. Since the width of the grey cloth is relatively large after it comes off the loom, it is easy to cause insufficient radial shrinkage if it is directly pre-shaped at this time, which further affects the gram weight of the fabric and the fullness and thickness of the hand feel. In this embodiment, the step of setting open-width washing is added before pre-shaped, so that the fabric shrinks fully after being heated, so that it is not easy to produce folds and wrinkles, thereby obtaining a better appearance and feel of the fabric. Preferably, the washing temperature is 75℃ and the speed is 25m/min.

In this embodiment, the step S32, the pre-forming of the blank includes: high-temperature pre-forming the fabric after the open-width washing in the step S31 at 170-180°C, with a speed of 20-30m/min, overfeeding of 12%-25%, and weft stretching of 0-6%. Preferably, the pre-forming temperature is 175°C, the speed is 25m/min, and the overfeed is 15%. This setting prevents the fabric from becoming thinner or collapsing during the subsequent dyeing process.

As an embodiment of the present invention, the step S33, dyeing includes: immersing the pre-formed grey cloth into a dyeing vat, with a bath ratio of 1:10, using disperse dyes, dyeing with segmented temperature control, and performing reduction cleaning after dyeing; wherein the disperse dyes include: 2-3% dye, 2-3g/L leveling agent, 1.5-3g/L chelating dispersant, 3-5g/L sodium acetate and HAc (pH 4.5-5); the segmented temperature control process is: heating from room temperature to 85°C at 1.5°C/min, keeping warm for 5 minutes, then continuing to heat to 120°C at 1.5°C/min, keeping warm for 40-50 minutes, and cooling to 70°C at 2°C/min, and the cleaning solution for the reduction cleaning includes: 2.5g/L _Na2CO3 and 2.5g/L _hydrosulfite .

Furthermore, in step S34, the sanding includes: performing sanding treatment on a carbon sanding machine, wherein the sanding speed is 16-20 m/min, and the sanding times are 2 times. This setting can grind the fibers on the surface of the fabric into a fluffy state, thereby making the surface of the fabric more fluffy and soft, closer to the feel of cotton material, and more skin-friendly. Preferably, the sanding speed is 18 m/min.

Furthermore, the step S35, the reshaping includes: performing reshaping treatment on the fabric dyed in the step S34 at 130°C to 150°C, with a speed of 22 to 28 m/min and an overfeed of 18% to 22%. Through this setting, the final formed two-component polyester imitation cotton elastic knitted fabric is obtained. Preferably, the reshaping temperature is 150°C, the speed is 25 m/min, and the overfeed is 20%.

In summary, it is not difficult to conclude that the fabric and preparation method thereof provided in this embodiment have the following advantages:

First, the bi-component polyester imitation cotton elastic knitted fabric described in the present application is interwoven with bi-component imitation cotton elastic composite yarn and conventional polyester, so that the fabric has an appearance and feel close to cotton;

Second, the bi-component polyester cotton-like elastic knitted fabric of the application, which is a fabric interwoven with bi-component polyester elastic fiber and conventional polyester, has excellent dimensional stability, stain resistance, wrinkle resistance, abrasion resistance and easy dyeing;

Third, the bi-component polyester cotton-like elastic knitted fabric described in the present application is a fabric interwoven with bi-component polyester elastic fibers and conventional polyester to form a unique horizontal stripe texture that combines roughness and delicacy, which is more fashionable and easier to attract users;

Fourth, the present application adds a flat-width washing process before dyeing and pre-setting to allow the blank to shrink fully, and then adds a sanding process after pre-setting, so that the fabric provided by the present application is closer to the fluffy and softness of cotton and more skin-friendly.

Although the present invention is disclosed as above, the present invention is not limited thereto. In the description of this specification, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the scope of protection of the present invention should be based on the scope defined by the claims.

Claims (8)

1. The double-component polyester cotton-like elastic knitted fabric is characterized in that the fabric weave is a variable Roman fabric weave, the fabric is formed by interweaving double-component cotton-like elastic composite filaments and polyester filaments, and the double-component cotton-like elastic composite filaments are stretch textured filaments formed by processing PTT/PET composite filaments and full-dull common polyester by POY; the fabric is woven by 8 paths of one cycle, wherein 1, 2,3, 4,5 and 6 paths of the fabric are connected with the double-component cotton-like elastic composite yarn, and 7 and 8 paths of the fabric are connected with the polyester filament yarn; the arrangement mode of the knitting needles during the fabric knitting is that the upper dial AB is arranged in sequence, the lower needle cylinder BA is arranged in sequence, wherein A represents a high heel needle, and B represents a low heel needle; the 1 st path and the 2 nd path are knitted with double rib tissues, namely, the 1 st path upper needle dial and the lower needle cylinder high heel needle all participate in knitting, and the low heel needle all does not participate in working; the dial on the 2 nd path and the low heel needle of the lower needle cylinder all participate in knitting, and the high heel needle does not participate in working; the upper dial knitting needle of the 3 rd path does not participate in the work, and the lower needle cylinder knitting needle completely participates in the knitting; the 4 th path of lower needle cylinder knitting needles do not participate in the work, and the upper dial knitting needles all participate in the knitting; the 5 th and 6 th paths of knitting double rib tissues, namely, the 5 th path of upper needle dial and the lower needle cylinder high heel needle all participate in knitting, and the low heel needle all does not participate in working; the upper needle dial and the lower needle cylinder of the 6 th path are all engaged in knitting, and the high heel needle is not all engaged in working; the upper dial knitting needle on the 7 th path does not participate in the work, and the lower needle cylinder knitting needle completely participates in the knitting; the 8 th path of lower needle cylinder knitting needles do not participate in the work, and the upper dial knitting needles all participate in the knitting; the proportion range of PTT/PET composite yarn and full-dull common polyester in the two-component cotton-like elastic composite yarn is 1:1-2:3.

2. The bi-component polyester cotton-like elastic knitted fabric according to claim 1, wherein the ratio of the bi-component cotton-like elastic composite yarn to the polyester filaments is 2:3-5:6.

3. The bi-component polyester cotton-like elastic knitted fabric according to claim 2, wherein the yarn count thickness of the bi-component cotton-like elastic composite yarn ranges from 50d to 180d, and the yarn count thickness of the polyester filaments ranges from 100d to 300d.

4. A method for preparing a fabric, which is characterized in that the method is used for preparing the bi-component polyester cotton-like elastic knitted fabric according to any one of claims 1-3, and the method comprises the following steps:

s1, preparing yarn counts;

s2, weaving a fabric;

s3, dyeing and finishing process.

5. The method for producing a fabric according to claim 4, wherein the step S3 comprises:

s31, open-width water washing;

s32, blank presetting;

S33, dyeing;

s34, roughening;

S35, resetting and shaping.

6. The method for preparing a fabric according to claim 5, wherein the step S31 of open-width washing comprises: and (3) putting the fabric woven in the step (S2) into an open width machine for washing in an open width and flat state, wherein the temperature is 60-80 ℃ and the speed is 15-25 m/min.

7. The method for preparing a fabric according to claim 5, wherein the dyeing in step S33 includes: immersing the blank cloth after blank pre-shaping into a dye vat, wherein the bath ratio is 1:10, dyeing by adopting disperse dye in a sectional temperature control way, and carrying out reduction cleaning after dyeing; wherein the disperse dye comprises: 2-3% of dye, 2-3g/L of leveling agent, 1.5-3g/L of chelating dispersant, 3-5g/L of sodium acetate and HAc with pH value of 4.5-5; the sectional temperature control process comprises the following steps: heating to 85 ℃ from normal temperature at 1.5 ℃/min, preserving heat for 5min, continuously heating to 120 ℃ at 1.5 ℃/min, preserving heat for 40-50 min, and cooling to 70 ℃ at 2 ℃/min; the cleaning solution for reduction cleaning comprises: 2.5g/L Na ₂CO₃ and 2.5g/L sodium hydrosulfite.

8. The method of producing a fabric according to claim 5, wherein the step S34 includes: and (3) roughening the dyed fabric in the step (S33) on a carbon roughening machine, wherein the roughening speed is 16-20 m/min, and the number of roughening times is 2.