All-cotton four-way stretch fabric and preparation method thereof

Abstract

The invention relates to an all-cotton four-way stretch fabric and a preparation method thereof, and belongs to the technical field of textile dyeing and finishing. The preparation method comprises the following steps: performing singeing, enzyme desizing, liquid ammonia finishing, loose alkali shrinkage and overfeeding soft heat setting on gray fabric to obtain the all-cotton four-way stretch fabric. The warp-wise and weft-wise shrinkage rates of the prepared four-way stretch fabric are-3.0%-0%, the warp-wise elastic elongation rate is 12%-15%, the weft-wise elastic elongation rate is 12%-18%, and the elastic residual elongation rate is smaller than or equal to 8%; obvious warp and weft elasticity can be achieved without elastic fibers, the problems that elastic fabrics such as spandex core-spun yarn fabrics are complex to manufacture, unstable in fabric size and the like are solved, the warp and weft elasticity is obvious, the size stability is good, the hand feeling is soft, and the price is low; the preparation method is simple, does not need equipment transformation, is easy to operate and does not damage fiber strength.

Description

TECHNICAL FIELD

[0001] The present application relates to a full cotton four-way stretch fabric and a preparation method thereof, and belongs to the technical field of textile dyeing and finishing. BACKGROUND

[0002] Full cotton fabric is soft, moisture-absorbing, breathable, skin-friendly and non-irritating, and is deeply loved by consumers. Full cotton fabric does not add any spandex or other elastic fibers, and the stretching activity is restricted. In order to improve the elastic comfort of pure cotton fabric, technical workers have developed full cotton natural weft elastic fabric. Full cotton natural weft elastic fabric uses loose mercerization, and the swelling and shrinking of cotton causes the bending shape of the yarn in the fabric to change, giving the fabric weft comfort elasticity.

[0003] Full cotton natural weft elastic fabric only has elasticity in the weft direction, and the elasticity and extensibility in the warp direction are weak, which affects the elastic comfort. In order to provide more elastic extension space, so that the warp and weft directions have elasticity (four-way stretch), to adapt to the full range of human activities, the development of full cotton four-way stretch fabric is proposed. Full cotton four-way stretch fabric does not contain any spandex or other elastic fibers, and in the process of dyeing, weaving and finishing, the warp yarn is subjected to the action of tension stretching, and it is difficult to make the warp elasticity.

[0004] Chinese patent CN115838988A discloses a production method of woven pure cotton warp and weft natural elastic fabric, which has the following characteristics: through woven loose desizing, first knitting and stretching, knitting loose mercerization, knitting drying, second knitting and stretching, and knitting preshrinking steps to realize warp and weft double elasticity. The principle is mainly to use the characteristics of overfeed and small tension of knitting fabric production equipment to reduce the damage to the warp elasticity of full cotton woven fabric. A knitting stretching is added between the woven loose desizing and the knitting loose mercerization steps to provide space for the bending and shrinking of the warp yarn, and the elasticity is obtained by using loose mercerization to shrink the warp and weft directions. This technical solution needs to be realized on a knitting equipment, which has high requirements for the equipment; in addition, the warp elasticity elongation rate is 8-12%, and the elasticity is not obvious. SUMMARY

[0005]

Technical problem

[0006] Full cotton natural weft elastic fabric only has elasticity in the weft direction, and the elasticity and extensibility in the warp direction are weak. The existing method for improving the warp elasticity of woven pure cotton fabric has high requirements for the equipment, and the warp elasticity elongation rate is insufficient.

[0007]

Technical solution

[0008] The first object of the present application is to provide a full cotton four-way stretch fabric, which is a woven fabric; the warp and weft shrinkage rates are -3.0% to 0%; the warp elasticity elongation rate is 12% to 15%; the weft elasticity elongation rate is 12% to 18%; and the elastic residual elongation rate is ≤8%.

[0009] In one embodiment of the present application, the full-cotton four-way stretch fabric is a yarn-dyed fabric or a piece-dyed fabric.

[0010] In one embodiment of the present application, the yarn fineness of the full-cotton four-way stretch fabric is 25-60S.

[0011] In one embodiment of the present application, the woven fabric is selected from one of a plain fabric, a twill fabric, and a satin fabric.

[0012] A second object of the present application is to provide a preparation method of the above full-cotton four-way stretch fabric, comprising the steps of singeing grey fabric → enzyme desizing → liquid ammonia finishing → loose alkali shrinking → overfeed softening heat setting, to obtain the full-cotton four-way stretch fabric.

[0013] In one embodiment of the present application, the fabric width of the grey fabric is 1.15-1.35 times the width of the finished product, and the weft density of the finished product is 1.15-1.35 times the weft density of the grey fabric.

[0014] In one embodiment of the present application, the speed of the liquid ammonia finishing is 25-35 m / min.

[0015] The loose alkali shrinking process is performed on the grey fabric under a tension-free or low-tension dyeing state. The alkali shrinking treatment under the tension-free condition ensures no additional tension draft, which is beneficial to fully relaxing and shrinking the fibers in the yarn and releasing internal stress, thereby improving the dimensional stability of the fabric.

[0016] In one embodiment of the present application, the equipment used in the loose alkali shrinking is selected from one of an air flow cylinder, an overflow cylinder, and a sand washing cylinder.

[0017] In one embodiment of the present application, the loose alkali shrinking comprises the steps of preparing an alkali solution → feeding the fabric → alkali shrinking → first water washing → second water washing → first acid washing → second acid washing.

[0018] In one embodiment of the present application, in the loose alkali shrinking, the alkali solution is a sodium hydroxide aqueous solution with a concentration of 120-150 g / L; the temperature of the alkali shrinking is 10-40℃, and the time is 10-30 min.

[0019] In one embodiment of the present application, in the loose alkali shrinking, the temperature of the first water washing is 40-60℃, and the time is 6-20 min.

[0020] In one embodiment of the present application, in the loose alkali shrinking, the temperature of the second water washing is 40-60℃, and the time is 6-20 min.

[0021] In one embodiment of the present application, in the loose alkali shrinking, the first acid washing is performed using an acetic acid aqueous solution with a pH value of 4-5; the temperature of the first acid washing is 40-60℃, and the time is 10-25 min.

[0022] In one embodiment of the present application, in the loose alkali shrinking process, the second acid washing is carried out using an acetic acid aqueous solution with a pH value of 4-5; the temperature of the second acid washing is 40-60 DEG C, and the time is 10-25 min.

[0023] In one embodiment of the present application, the temperature of the soft heat setting oven is 120-135 DEG C; the upper and lower overfeed is 10-20%, and the left and right brush wheel overfeed is 20-30%; the speed is 30-40 m / min.

[0024] In one embodiment of the present application, in the soft heat setting process, the fabric is impregnated with a softener aqueous solution with a concentration of 10-40 g / L; the softener is a silicon oil softener.

[0025] In one embodiment of the present application, the preparation method of the full cotton four-way stretch color woven fabric comprises the steps of: grey fabric weaving, singeing, enzyme desizing, liquid ammonia finishing, loose alkali shrinking, and soft heat setting with overfeed.

[0026] In one embodiment of the present application, the preparation method of the full cotton four-way stretch grey fabric comprises the steps of: grey fabric weaving, singeing, enzyme desizing, liquid ammonia finishing, loose alkali shrinking, air flow dyeing, and soft heat setting with overfeed.

[0027] The method of the present application has wide applicability, and the conventional enzyme desizing process and the conventional dyeing process of the full cotton fabric can be well applied in the present application.

[0028] A third object of the present application is to provide the application of the above full cotton four-way stretch fabric in the field of textiles.

[0029] Advantages:

[0030] The four-way stretch fabric prepared by the present application is 100% cotton, does not contain any spandex or other elastic fibers, and does not need to spin core yarns for traditional spandex core yarn woven fabric to achieve obvious warp and weft elasticity. The preparation method does not need high temperature setting, avoiding the problems of complex spandex core yarn fabric manufacturing, unstable fabric size, etc.

[0031] The present application is mainly produced on a woven equipment, and the four-way stretch of the full cotton fabric is realized through grey fabric design, liquid ammonia finishing, loose alkali shrinking process, and soft heat setting process with overfeed. The preparation method is simple, does not need equipment modification, is easy to operate, and does not damage the fiber strength.

[0032] The full cotton four-way stretch fabric of the present application has obvious warp and weft elasticity, good size stability, soft hand feeling, low price, energy saving, environmental protection, etc. The warp elasticity elongation rate of the fabric is 12%-15%, the weft elasticity elongation rate is 12%-18%, the elastic residual elongation rate is ≤8%, and the warp and weft shrinkage rates are -3.0%-0%. DETAILED DESCRIPTION

[0033] Example 1

[0034] A full cotton four-way stretch yarn-dyed fabric, the warp and weft yarns are all cotton yarns, the specific finished product specification is: 50S cotton * 40S cotton * 130 roots / inch * 80 roots / inch, 1 / 1 plain weave, the finished product width is 57-58 inches. The preparation method comprises the following steps:

[0035] Gray fabric yarn-dyeing → singeing → enzyme desizing → liquid ammonia finishing → loose alkali shrinking → overfeed softening heat setting

[0036] (1) Gray fabric yarn-dyeing: according to the finished product specification, the gray fabric width is designed as 171 cm, and the weft density of the gray fabric is 68 roots / inch, and the gray fabric is woven.

[0037] (2) Liquid ammonia finishing: the speed is 30 m / min, the falling width is 140-141 cm, and the weft density is 66-67 roots / inch.

[0038] (3) Loose alkali shrinking: preparing alkali solution → feeding fabric → alkali shrinking → first water washing at 50 ℃ for 10 min → second water washing at 50 ℃ for 10 min → first acid washing at 50 ℃, pH = 4.5, 15 min → second acid washing at 50 ℃, 15 min, pH = 4.5

[0039] The caustic soda concentration of alkali shrinking is 140 g / L, the alkali shrinking temperature is room temperature, the alkali shrinking time is 15 min, the falling width is 143-144 cm, and the falling weft density is 79-80 roots / inch.

[0040] (4) Overfeed softening heat setting: the speed is 30 m / min, the oven temperature is 135 ℃, the working solution is DT5258 softener 30 g / L, the working solution pH is 5-6, the overfeed of up and down is 15%, the overfeed of left and right brush is 25%, the falling width is 145-147 cm, and the falling weft density is 79-80 roots / inch.

[0041] Table 1 Performance index of the full cotton four-way stretch yarn-dyed fabric prepared in Example 1

[0042]

[0043]

[0044] Example 2

[0045] A full cotton four-way stretch gray fabric, the warp and weft yarns are all cotton yarns, the specific finished product specification is: 40S cotton * 40S cotton * 120 roots / inch * 80 roots / inch, 2 / 2 right slant, and the finished product width is 57-58 inches. The preparation method comprises the following steps:

[0046] Gray fabric weaving → singeing → enzyme desizing → liquid ammonia finishing → loose alkali shrinking → air flow dyeing → overfeed softening heat setting

[0047] (1) Grey fabric weaving: according to the finished product specification, the grey fabric width of 190 cm and the weft density of 68 ends / inch were designed, and the grey fabric was woven.

[0048] (2) Liquid ammonia finishing: the speed of 30 m / min, the fabric width of 139-141 cm, and the weft density of 66-67 ends / inch.

[0049] (3) Loose alkali shrinking: preparation of alkali solution→ feeding of fabric→ alkali shrinking→ the first water washing at 55℃ for 10 min→ the second water washing at 48℃ for 10 min→ the first acid washing at 54℃ with pH of 4.3 for 15 min→ the second acid washing at 46℃ for 15 min with pH of 4.8

[0050] The caustic soda concentration of alkali shrinking was 150 g / L, the alkali shrinking temperature was room temperature, the alkali shrinking time was 15 min, the fabric width was 143-144 cm, and the weft density was 79-80 ends / inch.

[0051] (4) Super feeding soft heat setting: the speed of 35 m / min, the oven temperature of 135℃, the working solution of DT5258 softener 10 g / L, the working solution pH of 5-6, the up and down super feeding of 10%, the left and right brush super feeding of 20%, the fabric width of 145-147 cm, and the weft density of 79-80 ends / inch.

[0052] Table 2 Performance index of the full cotton stretch fabric prepared in Example 2

[0053]

[0054] Example 3

[0055] A full cotton stretch color woven fabric, the warp and weft yarns are all full cotton yarns, the specific finished product specification is: 40S cotton * 50S cotton * 130 ends / inch * 80 ends / inch, 2 / 2 left slant, and the finished product width is 57-58 inches. The preparation method comprises the following steps:

[0056] Grey fabric color weaving→ singeing→ enzyme desizing→ liquid ammonia finishing→ loose alkali shrinking→ super feeding soft heat setting

[0057] (1) Grey fabric color weaving: according to the finished product specification, the grey fabric width of 186 cm and the weft density of 68 ends / inch were designed, and the grey fabric was woven.

[0058] (2) Liquid ammonia finishing: the speed of 35 m / min.

[0059] (3) Loose alkali shrinking: preparation of alkali solution→ feeding of fabric→ alkali shrinking→ the first water washing at 42℃ for 18 min→ the second water washing at 58℃ for 8 min→ the first acid washing at 42℃ with pH of 4.2 for 22 min→ the second acid washing at 58℃ for 12 min with pH of 4.8

[0060] The caustic concentration of the caustic reduction is 130 g / L, the caustic reduction temperature is room temperature, and the caustic reduction time is 10 min.

[0061] (4) Soft heat setting with overfeed: the running speed is 37 m / min, the oven temperature is 120 °C, the working solution is DT5258 softener 10 g / L, the working solution pH is 5-6, the up and down overfeed is 12%, and the left and right brush overfeed is 22%.

[0062] The above provided examples are not intended to limit the scope covered by the present application, and the described steps are not intended to limit the execution order. The improvements made by those skilled in the art to the present application in combination with the existing common knowledge are also within the protection scope defined by the claims of the present application.

Claims

1. A pure cotton four-way stretch fabric, characterized in that: The all-cotton four-way stretch fabric is a woven fabric; the warp and weft shrinkage rates are -3.0% to 0%; the warp elastic elongation is 12% to 15%; the weft elastic elongation is 12% to 18%; and the elastic residual elongation is ≤8%.

2. The all-cotton four-way stretch fabric according to claim 1, characterized in that: The pure cotton four-way stretch fabric is a yarn-dyed fabric or a grey-dyed fabric; the yarn fineness is 25~60S.

3. The method for preparing the all-cotton four-way stretch fabric according to claim 1, comprising the steps of: subjecting the grey cloth to singeing, enzyme desizing, liquid ammonia finishing, loose alkali shrinking, and overfeed softening and heat setting to obtain the all-cotton four-way stretch fabric.

4. The preparation method according to claim 3, characterized in that The speed of liquid ammonia finishing is 25-35m / min.

5. The preparation method according to claim 3, characterized in that The loose alkali shrinkage process includes the following steps: preparing alkali solution → feeding cloth → alkali shrinkage → first water washing → second water washing → first pickling → second pickling.

6. The preparation method according to claim 5, characterized in that The temperature of the first water wash is 40-60°C, and the time is 6-20 minutes; the temperature of the second water wash is 40-60°C, and the time is 6-20 minutes.

7. The preparation method according to claim 5, characterized in that The first pickling is performed using an acetic acid aqueous solution with a pH value of 4 to 5; the temperature of the first pickling is 40 to 60° C., and the time is 10 to 25 minutes; the second pickling is performed using an acetic acid aqueous solution with a pH value of 4 to 5; the temperature of the second pickling is 40 to 60° C., and the time is 10 to 25 minutes.

8. The preparation method according to claim 3, characterized in that The temperature of the drying room for overfeed soft heat setting is 120-135℃; the upper and lower overfeeds are 10-20%, and the left and right brush wheels are overfeed 20-30%; the vehicle speed is 30-40m / min.

9. The preparation method according to claim 3, characterized in that The 100% cotton four-way stretch fabric is either yarn-dyed or grey-dyed; The preparation method of the all-cotton four-way stretch yarn-dyed fabric comprises the following steps: greige yarn-dyed weaving → singeing → enzyme desizing → liquid ammonia finishing → loose alkali shrinking → overfeed softening and heat setting; The preparation method of the all-cotton four-side stretch grey-dyed fabric comprises the following steps: grey cloth weaving → singeing → enzyme desizing → liquid ammonia finishing → loose alkali shrinkage → air flow dyeing → overfeed softening and heat setting.

10. Use of the all-cotton four-way stretch fabric according to claim 1 or 2 in the field of textiles.

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