阅读说明：本技术 一种铜氨仿真丝弹性针织面料及其制备方法和应用 (Copper ammonia silk-like elastic knitted fabric and preparation method and application thereof ) 是由 刘伟 李姣姣 于 2020-06-05 设计创作，主要内容包括：本发明提供一种铜氨仿真丝弹性针织面料及其制备方法和应用。所述面料由非弹性纱线和弹性纱线交织而成,所述面料的每路非弹性纱线覆盖在每路弹性纱线上；所述非弹性纱线包括：含铜氨纤维的复合丝和冷感长丝。本发明所述铜氨仿真丝弹性针织面料具有真丝般的悬垂感,手感滑爽,接触凉感,吸汗速干的、抗紫外线效果,同时解决了铜氨纤维强力差,编织困难及化学纤维起静电的问题。(The invention provides a cuprammonium imitated silk elastic knitted fabric and a preparation method and application thereof. The fabric is formed by interweaving inelastic yarns and elastic yarns, and each path of inelastic yarns of the fabric covers each path of elastic yarns; the inelastic yarn comprises: composite yarn containing copper ammonia fiber and cold-feeling filament yarn. The copper ammonia silk-like elastic knitted fabric has silk-like suspension feeling, smooth hand feeling, cool touch feeling, sweat absorption and quick drying and ultraviolet resistance, and solves the problems of poor strength of copper ammonia fibers, difficulty in weaving and static electrification of chemical fibers.)

1. The silk-like elastic knitted fabric is characterized in that the fabric is formed by interweaving inelastic yarns and elastic yarns, and each path of inelastic yarns of the fabric covers each path of elastic yarns;

the inelastic yarn comprises: composite yarn containing copper ammonia fiber and cold-feeling filament yarn.

2. The silk-like elastic knitted fabric according to claim 1, wherein the weave structure of the silk-like elastic knitted fabric is a weft plain weave structure;

preferably, the mass of the silk-like elastic knitted fabric is 80-200g/m²；

Preferably, the mass ratio of the non-elastic yarn to the elastic yarn is (6-9): 1-4.

3. The silk-like elastic knitted fabric according to claim 1 or 2, wherein the cool-feeling filament yarn is a cool-feeling nylon filament yarn or a cool-feeling polyester filament yarn;

preferably, the fineness of the cool-feeling filament is 40-200D, preferably 50-150D;

preferably, the composite yarn containing the copper ammonia fiber is a composite yarn formed by doubling filaments and the copper ammonia fiber;

preferably, the composite yarn containing copper ammonia fiber is nylon copper ammonia composite yarn or polyester copper ammonia composite yarn;

preferably, the density of the composite filament containing copper ammonia fiber is 40-150T;

preferably, the way ratio of the cold-feeling filament to the composite filament containing the copper ammonia fiber is (1-3) to 1, preferably 2 to 1;

preferably, the loop length of the inelastic yarn is 24.5 to 33.5cm/100 needles.

4. The silk-like elastic knitted fabric according to any one of claims 1 to 3, wherein the elastic yarn is a spandex filament;

preferably, the fineness of the elastic yarn is 10-40D;

preferably, the loop length of the elastic yarn is 8.5-12.5cm/100 needles.

5. The method for preparing an imitated silk elastic knitted fabric according to any one of claims 1 to 4, wherein the method for preparing the imitated silk elastic knitted fabric comprises the following steps in sequence: weaving, presetting, pre-treating, dyeing, soaping and setting.

6. The preparation method according to claim 5, wherein the weaving comprises the following specific steps: the non-elastic yarns and the elastic yarns are knitted by adopting a weft plain knitting method, each path of non-elastic yarns formed by knitting completely covers each path of elastic yarns, and a blank fabric is obtained by circular knitting;

preferably, the knitting is performed on a 28-36 needle weft knitting machine;

preferably, the temperature for presetting is 180-200 ℃;

preferably, the overfeeding amount of the presetting is 5-15%, and the vehicle speed of the presetting is 20-25 yards;

preferably, the pretreatment comprises the following specific steps: dipping the pre-shaped fabric in the pre-treatment slurry;

preferably, the bath ratio of the pre-shaped fabric in the pre-treatment slurry is 1 (8-12);

preferably, the dyeing is a medium-dark dyeing dye, and the pretreatment slurry comprises the following components in concentration: glacial acetic acid 0.1-1g/L, deoiling agent 0.1-1g/L and water in balance;

preferably, the dyeing is a medium-dark dye, and the dipping temperature is 75-85 ℃;

preferably, the dyeing is light-colored dye, and the pretreatment slurry comprises the following components in concentration: 0.1-0.5g/L of degreasing agent, 1-3g/L of refining enzyme, 8-12g/L of hydrogen peroxide, 0.1-0.5g/L of deoxyenzyme, 0.1-1g/L of hydrogen peroxide stabilizer and the balance of water;

preferably, the dyeing is light-colored dye, and the impregnation temperature is 90-100 ℃.

7. The method according to any one of claims 5 or 6, wherein the dyeing comprises in particular the steps of:

(a) copper ammonia dyeing: soaking the pretreated fabric in warm water, sequentially adding a chelating agent, a dye and anhydrous sodium sulphate, heating, preserving heat and dyeing, and adding soda ash for preserving heat to finish dyeing of copper ammonia fibers in the fabric;

(b) and (3) post-treatment: soaking the fabric dyed with the cuprammonium in a glacial acetic acid solution, and soaping by using a soaping agent;

(c) dyeing filaments: soaking the post-treated fabric in a dye solution to complete dyeing of polyester filaments or nylon filaments in the fabric;

preferably, the warm water of step (a) has a temperature of 35-45 ℃;

preferably, the chelating agent is added in the step (a), the temperature is kept for 20-40min at 35-45 ℃, the dye is added, the temperature is kept for 20-40min at 35-45 ℃, and finally the anhydrous sodium sulphate is added, and the temperature is kept for 5-15min at 35-45 ℃;

preferably, the concentration of the chelating agent is 0.2-0.3 g/L;

preferably, the concentration of the dye is 0.01-5% o.w.f.;

preferably, the concentration of the anhydrous sodium sulphate is 5-15 g/L;

preferably, the temperature-rising and heat-preserving dyeing in the step (a) is specifically as follows: heating to 55-65 deg.C at a heating rate of 20 deg.C/min, and maintaining for 5-15 min;

preferably, the time for heat preservation after the soda ash is added in the step (a) is 20-30 min;

preferably, the concentration of the calcined soda in the step (a) is 4-6 g/L;

preferably, the concentration of the glacial acetic acid solution in the step (b) is 0.1-1 g/L;

preferably, the bath ratio of the fabric and the glacial acetic acid solution in the step (b) is 1 (8-12);

preferably, the time for the impregnation of step (b) is 5-15 min;

preferably, the concentration of the soaping agent in the step (b) is 0.1-1 g/L;

preferably, the temperature of the soaping in the step (b) is 70-80 ℃, and the time of the soaping is 5-15 min;

preferably, said dye liquor of step (c) comprises, on a consistency basis: 0.01-5% of dye o.w.f., 0.5-2g/L of leveling agent, 0.1-1g/L of glacial acetic acid and the balance of water;

preferably, the filaments in step (c) are nylon filaments, the dye is an acid dye, the impregnation temperature is 90-100 ℃, and the impregnation time is 20-40 min;

preferably, the filaments in the step (c) are polyester filaments, the dye is a disperse dye, the impregnation temperature is 120-130 ℃, and the impregnation time is 20-40 min.

8. The preparation method according to any one of claims 5 to 7, wherein the dyed fabric is a light-colored fabric, and the soaping specifically comprises: placing the dyed fabric in 50-70 ℃ water for hot washing for 5-15 min;

preferably, the fabric obtained after dyeing is a medium-dark fabric, and the soaping specifically comprises the following steps: soaping the dyed fabric in an acid soap solution at the temperature of 50-70 ℃ for 10-30min, and fixing the color in a fixing agent solution at the temperature of 75-85 ℃ for 10-30 min;

preferably, the concentration of the acid soap solution is 0.1-1 g/L;

preferably, the concentration of the fixing agent solution is 1-3 g/L;

preferably, the setting temperature is 130-140 ℃;

preferably, the overfeeding amount of the sizing is 5-15%, and the vehicle speed of the sizing is 20-25 yards;

preferably, a soft finishing agent is required to be added in the shaping process;

preferably, the concentration of the soft finishing agent is 0.5-2 g/L.

9. The preparation method of any one of claims 5 to 8, wherein the preparation method of the imitated silk elastic knitted fabric comprises the following steps of:

(1) weaving: the non-elastic yarns and the elastic yarns are knitted by adopting a weft plain knitting method, each path of non-elastic yarns formed by knitting completely covers each path of elastic yarns, and the smooth blank fabric is obtained by circular knitting;

(2) presetting: presetting blank fabric at the temperature of 180-200 ℃ by 5-15% of overfeed amount and 20-25 yards of vehicle speed;

(3) pretreatment: dipping the pre-shaped fabric in the pre-treatment slurry;

the dyeing in the step (4) is a medium-dark dyeing dye, and the pretreatment slurry comprises the following components in concentration: glacial acetic acid 0.1-1g/L, deoiling agent 0.1-1g/L and water in balance, wherein the dipping temperature is 75-85 ℃;

dyeing is carried out to obtain light-colored dye, and the pretreatment slurry comprises the following components in concentration: 0.1-0.5g/L of degreasing agent, 1-3g/L of refining enzyme, 8-12g/L of hydrogen peroxide, 0.1-0.5g/L of deoxyenzyme and 0.1-1g/L of hydrogen peroxide stabilizer, wherein the dipping temperature is 90-100 ℃;

(4) copper ammonia dyeing: soaking the pretreated fabric in warm water at 35-45 ℃, sequentially adding a chelating agent, preserving heat for 20-40min at 35-45 ℃, adding a dye, preserving heat for 20-40min at 35-45 ℃, finally adding anhydrous sodium sulphate, preserving heat for 5-15min at 35-45 ℃, raising the temperature to 55-65 ℃ at the heating rate of 20 ℃/min, preserving heat for 5-15min, dyeing, adding soda, preserving heat for 20-30min, and finishing dyeing the copper ammonia fiber in the fabric;

(5) and (3) post-treatment: soaking the fabric dyed with cuprammonium in glacial acetic acid solution for 5-15min, adding soaping agent, and soaping at 70-80 deg.C for 5-15 min;

(6) dyeing filaments: soaking the post-treated fabric in a dye solution to finish dyeing of polyester filaments or nylon filaments in the fabric;

the filaments in the step (6) are nylon filaments, the dye is an acid dye, the dipping temperature is 90-100 ℃, and the dipping time is 20-40 min;

the filaments in the step (6) are polyester filaments, the dye is disperse dye, the dipping temperature is 120-130 ℃, and the dipping time is 20-40 min;

(7) soaping: the dyed fabric is light-colored, and is put into water with the temperature of 50-70 ℃ for hot washing for 5-15 min; the dyed fabric is medium-dark fabric, the dyed fabric is placed in an acid soap solution at 50-70 ℃ for soaping for 10-30min, and then the color is fixed in a color fixing agent solution at 75-85 ℃ for 10-30 min;

(8) shaping: and (3) shaping the fabric after the soaping at the temperature of 130-.

10. Use of a cuprammonium imitation silk elastic knit according to any one of claims 1-4 in the manufacture of intimate apparel;

preferably, the intimate apparel comprises an undergarment or a T-shirt.

Technical Field

The invention belongs to the technical field of textile clothing, and particularly relates to a copper ammonia silk-like elastic knitted fabric, and a preparation method and application thereof.

Background

Real silk is a natural protein fiber, contains 18 amino acids required by human body, and the clothes made of real silk is called as 'second skin', and has the characteristics of smoothness, good luster, good skin-friendly property, comfort in wearing, good moisture absorption and retention, but the real silk has high price, the material is delicate and expensive, is not easy to be managed, and is easy to yellow after illumination, poor in wrinkle resistance and easy to age. At present, a plurality of imitated silk fabrics appear on the market, the imitated silk effect of the fabrics is generally realized by modified terylene or after finishing, but the fabrics have the problems of sultriness, air impermeability and poor comfort when being worn.

CN102631030A discloses a silk-like high-elasticity knitted underwear fabric, which is formed by interweaving fine-denier cuprammonium/nylon bi-component filaments and spandex filaments, wherein the fine-denier cuprammonium/nylon bi-component filaments are positioned on the front surface of the fabric and completely cover the spandex filaments. The preparation method comprises the following steps: sequentially weaving on a machine, pre-shaping the fabric, pre-treating, dyeing cuprammonium, post-treating, dyeing nylon, soaping, softening and finishing, dehydrating and re-shaping. The silk-like high-elasticity knitted underwear fabric has the functions of smooth hand feeling, brightness, full appearance, soft hand feeling, antibiosis, comfort and the like. Only one strand of fine denier cuprammonium/nylon bicomponent filament is interwoven with spandex, so that the cool feeling effect is poor, and the defects of easy generation of static electricity and poor hygroscopicity still exist, so that the problems of stuffiness, air impermeability and poor comfort are still caused when the fabric is worn.

CN108754770A discloses a high-elasticity antistatic comfortable fabric which is formed by mutually weaving warps and wefts, wherein the warps are formed by blending nylon fibers, copper ammonia fibers and spandex, the wefts are formed by blending copper ammonia fibers and nylon fibers, the blending ratio of the nylon fibers, the copper ammonia fibers and the spandex in the warps is 1:2:1, and the blending ratio of the copper ammonia fibers and the nylon fibers in the wefts is 2: 1. However, the fabric obtained by blending the single copper ammonia fiber has the problems of poor bursting strength and insufficient elasticity.

Therefore, there is a need to develop a fabric having smooth hand, good elasticity and excellent cool feeling.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a cuprammonium imitated silk elastic knitted fabric and a preparation method and application thereof. The fabric has the advantages of silky drapability, smooth hand feeling, cool touch, sweat absorption, quick drying and ultraviolet resistance.

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

in a first aspect, the invention provides a silk-like elastic knitted fabric, which is formed by interweaving inelastic yarns and elastic yarns, wherein each path of inelastic yarns of the fabric covers each path of elastic yarns;

the inelastic yarn comprises: composite yarn containing copper ammonia fiber and cold-feeling filament yarn.

In the invention, the fabric is formed by interweaving inelastic yarns and elastic yarns, each path of inelastic yarns of the fabric covers each path of elastic yarns, namely, each path of cold feeling filament yarns of the fabric covers one path of elastic yarns, and each path of composite yarns containing copper ammonia fibers covers one path of elastic yarns.

In the invention, the non-elastic yarn comprises composite yarn containing copper ammonia fiber and cold-feeling filament. Among them, a cool material having a high thermal conductivity (i.e., a medium having a low heat absorption rate and a high heat dissipation rate) is added to a carrier such as a filament fiber, and thus the obtained cool filament has an excellent cool feeling at the moment of contacting the skin. The cool feeling material may be mica, jade, quartz, etc. In addition, the copper ammonia fiber is a regenerated cellulose fiber, which is prepared by dissolving natural cellulose raw materials such as cotton linters and the like in a concentrated ammonia solution of copper hydroxide or alkaline copper salt to prepare a copper ammonia fiber spinning solution, and spinning and forming the copper ammonia fiber spinning solution in a coagulating bath of water or dilute alkaline solution. In addition, each path of non-elastic yarn of the fabric completely covers each path of elastic yarn, namely, one path of elastic yarn is arranged under each path of non-elastic yarn, so that the elasticity and the resilience of the fabric are further improved, and the fabric is not easy to deform.

Preferably, the weave structure of the silk-like elastic knitted fabric is a weft plain weave structure.

Preferably, the mass of the silk-like elastic knitted fabric is 80-200g/m²For example, it may be 80g/m²、85g/m²、90g/m²、95g/m²、100g/m²、110g/m²、120g/m²、130g/m²、140g/m²、150g/m²、160g/m²、170g/m²、180g/m²、190g/m²、200g/m²And the like.

Preferably, the mass ratio of the inelastic yarn to the elastic yarn is (6-9): (1-4), and may be, for example, 6:4, 7:3, 8:2, or 9:1, etc.

Preferably, the cool-feeling filament yarn is cool-feeling nylon filament yarn or cool-feeling polyester filament yarn.

Preferably, the fineness of the cool-feeling filaments is 40 to 200D, and may be, for example, 40D, 50D, 60D, 70D, 80D, 90D, 100D, 110D, 120D, 130D, 140D, 150D, 200D, and the like, and preferably 50 to 150D.

Preferably, the composite yarn containing the copper ammonia fiber is a composite yarn formed by combining a filament and the copper ammonia fiber. Because the copper ammonia fiber has good moisture absorption, moisture release and dyeing performances, the copper ammonia fiber has high moisture absorption and moisture release efficiency and low specific resistance, the antistatic property is good, and the copper ammonia fiber is more comfortable to wear.

Preferably, the composite yarn containing copper ammonia fiber is nylon copper ammonia composite yarn or polyester copper ammonia composite yarn.

Preferably, the density of the composite filament containing copper ammonia fiber is 40-150T, such as 40T, 50T, 60T, 70T, 80T, 90T, 100T, 110T, 120T, 130T, 140T, 150T and the like.

Preferably, the ratio of the cold-feeling filament to the composite filament containing copper ammonia fiber is (1-3):1, for example, 1:1, 2:1 or 3:1, preferably 2: 1. For example, when the ratio of the cool feeling to the copper ammonia fiber is 2:1, the fabric can be obtained by alternately and circularly weaving two paths of cool feeling filaments and one path of composite filament containing copper ammonia fiber.

Preferably, the non-elastic yarn has a stitch length of 24.5 to 33.5cm/100 stitches, and may be, for example, 24.5cm/100 stitches, 25.5cm/100 stitches, 26.5cm/100 stitches, 27.5cm/100 stitches, 28.5cm/100 stitches, 29.5cm/100 stitches, 30.5cm/100 stitches, 31.5cm/100 stitches, 32.5cm/100 stitches, 33.5cm/100 stitches, or the like.

Preferably, the elastic yarn is spandex filament.

Preferably, the fineness of the elastic yarn is 10-40D, and may be, for example, 10D, 20D, 30D, 40D, or the like.

Preferably, the elastic yarn has a loop length of 8.5-12.5cm/100 stitches, and may be, for example, 8.5cm/100 stitches, 9.5cm/100 stitches, 10.5cm/100 stitches, 11.5cm/100 stitches, 12.5cm/100 stitches, or the like.

In a second aspect, the invention provides a method for preparing a silk-like elastic knitted fabric according to the first aspect, which comprises the following steps: weaving, presetting, pre-treating, dyeing, soaping and setting.

Preferably, the weaving comprises the following specific steps: and (3) knitting the inelastic yarns and the elastic yarns by adopting a weft plain knitting method, wherein each path of inelastic yarns formed by knitting completely covers each path of elastic yarns, and obtaining the blank fabric through circular knitting.

In the invention, in the weaving process, the inelastic yarn and the elastic yarn are respectively fed into an upper yarn feeding nozzle and a lower yarn feeding nozzle during yarn feeding and enter a weaving machine for weaving, so that each path of inelastic yarn is covered on the elastic yarn.

Preferably, the knitting is performed on a 28-36 needle weft knitting machine.

Preferably, the temperature for the pre-shaping is 180-200 ℃, for example, 180 ℃, 185 ℃, 190 ℃, 195 ℃, 200 ℃ and the like.

Preferably, the over-feeding amount of the presetting is 5-15%, such as 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15% and the like, and the vehicle speed of the presetting is 20-25 yards, such as 20 yards, 21 yards, 22 yards, 23 yards, 24 yards, 25 yards and the like.

Preferably, the pretreatment comprises the following specific steps: and (3) dipping the fabric subjected to the presetting in the pretreatment slurry.

Preferably, the bath ratio of the fabric after the pre-shaping in the pre-treatment slurry is 1 (8-12), and can be 1:8, 1:9, 1:10, 1:11, 1:12 and the like.

In the present invention, the "medium color" and "light color" are determined according to GSB 16-2159 and 2007 Standard depth cards for knitted products (1/12).

Preferably, the dyeing is a medium-dark dyeing dye, and the pretreatment slurry comprises the following components in concentration: glacial acetic acid 0.1-1g/L (e.g., 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1g/L, etc.) and deoiling agent 0.1-1g/L (e.g., 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1g/L, etc.), with the balance being water.

Preferably, the dyeing is a middle-dark dyeing, and the impregnation temperature is 75-85 deg.C, such as 75 deg.C, 76 deg.C, 77 deg.C, 78 deg.C, 79 deg.C, 80 deg.C, 81 deg.C, 82 deg.C, 83 deg.C, 84 deg.C, 85 deg.C, etc.

Preferably, the dyeing is light-colored dye, and the pretreatment slurry comprises the following components in concentration: 0.1-0.5g/L of degreasing agent, 1-3g/L of refining enzyme, 8-12g/L of hydrogen peroxide, 0.1-0.5g/L of deoxyenzyme, 0.1-1g/L of hydrogen peroxide stabilizer and the balance of water.

The dyeing is light-colored dyeing, and the concentration of the degreasing agent in the pretreatment slurry is 0.1-0.5g/L, and can be 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5g/L and the like.

The dyeing is light-colored dyeing, and the concentration of the refining enzyme in the pretreatment slurry is 1-3g/L, and can be 1g/L, 1.2g/L, 1.4g/L, 1.6g/L, 1.8g/L, 2g/L, 2.2g/L, 2.4g/L, 2.6g/L, 2.8g/L, 3g/L and the like.

The dyeing is light-colored dyeing, and the concentration of hydrogen peroxide in the pretreatment slurry is 8-12g/L, such as 8g/L, 8.5g/L, 9g/L, 9.5g/L, 10g/L, 10.5g/L, 11g/L, 11.5g/L, 12g/L and the like.

The dyeing is light-colored dyeing, and the concentration of the deoxyenzyme in the pretreatment slurry is 0.1-0.5g/L, and can be 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5g/L and the like.

The dyeing is light-colored dyeing, and the concentration of the hydrogen peroxide stabilizer in the pretreatment slurry is 0.1-1g/L, and can be 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1g/L and the like.

Preferably, the dyeing is light dyeing, and the impregnation temperature is 90-100 deg.C, such as 90 deg.C, 91 deg.C, 92 deg.C, 93 deg.C, 94 deg.C, 95 deg.C, 96 deg.C, 97 deg.C, 98 deg.C, 99 deg.C, 100 deg.C, etc.

Preferably, the dyeing specifically comprises the following steps:

(a) copper ammonia dyeing: soaking the pretreated fabric in warm water, sequentially adding a chelating agent, a dye and anhydrous sodium sulphate, heating, preserving heat and dyeing, and adding soda ash for preserving heat to finish dyeing of copper ammonia fibers in the fabric;

(b) and (3) post-treatment: soaking the fabric dyed with the cuprammonium in a glacial acetic acid solution, and soaping by using a soaping agent;

(c) dyeing filaments: and (3) soaking the post-treated fabric in a dye solution to complete dyeing of polyester filaments or nylon filaments in the fabric.

Preferably, the temperature of the warm water in step (a) is 35-45 deg.C, such as 35 deg.C, 36 deg.C, 37 deg.C, 38 deg.C, 39 deg.C, 40 deg.C, 41 deg.C, 42 deg.C, 43 deg.C, 44 deg.C, 45 deg.C, etc.

Preferably, the chelating agent is added in step (a), and then the mixture is kept at 35-45 ℃ for 20-40min (for example, 20min, 25min, 30min, 35min, 40min, etc.), the dye is added, and then the mixture is kept at 35-45 ℃ for 20-40min (for example, 20min, 25min, 30min, 35min, 40min, etc.), and finally the anhydrous sodium sulphate is added, and then the mixture is kept at 35-45 ℃ for 5-15min (for example, 5min, 6min, 8min, 10min, 12min, 15min, etc.).

Preferably, the step (a) is carried out by adding chelating agent at 35-45 deg.C, adding dye at the same temperature as that of adding chelating agent, continuously adding dye within 30min, continuously adding anhydrous sodium sulphate within 30min after adding dye, and keeping temperature for 10 min.

Preferably, the chelating agent is present at a concentration of 0.2 to 0.3g/L, and may be, for example, 0.2g/L, 0.22g/L, 0.24g/L, 0.26g/L, 0.28g/L, 0.3g/L, and the like.

Preferably, the dye is present in a concentration of 0.01-5% o.w.f., such as 0.01% o.w.f., 0.05% o.w.f., 0.1% o.w.f., 0.2% o.w.f., 0.3% o.w.f., 0.4% o.w.f., 0.6% o.w.f., 0.8% o.w.f., 1% o.w.f., 2% o.w.f., 3% o.w.f., 4% o.w.f, 5% o.w.f., and the like.

Preferably, the concentration of the anhydrous sodium sulphate is 5-15g/L, for example, 5g/L, 6g/L, 7g/L, 8g/L, 9g/L, 10g/L, 11g/L, 12g/L, 13g/L, 14g/L, 15g/L and the like.

Preferably, the temperature-rising and heat-preserving dyeing in the step (a) is specifically as follows: heating to 55-65 deg.C at a heating rate of 20 deg.C/min (such as 55 deg.C, 56 deg.C, 57 deg.C, 58 deg.C, 59 deg.C, 60 deg.C, 61 deg.C, 62 deg.C, 63 deg.C, 64 deg.C, 65 deg.C, etc.) and holding for 5-15min (such as 5min, 6min, 8min, 10min, 12min, 15min, etc.);

preferably, the time for maintaining the temperature after adding the soda ash in the step (a) is 20-30min, for example, 20min, 22min, 24min, 26min, 28min, 30min and the like.

Preferably, soda ash is continuously added in the step (a) at 60 ℃ within 30min, and the temperature is kept for 25 min.

Preferably, the concentration of soda ash in step (a) is 4-6g/L, for example, 4g/L, 4.5g/L, 5g/L, 5.5g/L, 6g/L, etc.

Preferably, the copper ammonia dye in the step (a) is specifically: adding chelating agent at 35-45 deg.C, adding dye for 30min, adding anhydrous sodium sulfate powder for 30min, and holding for 10 min. Heating to 55-65 deg.C at a heating rate of 20 deg.C/min, maintaining the temperature for 5-15min, dyeing, adding soda ash for 30min, and maintaining the temperature for 20-30 min.

Preferably, the concentration of the glacial acetic acid solution in step (b) is 0.1-1g/L, and may be, for example, 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1g/L, etc.

Preferably, the bath ratio of the fabric and the glacial acetic acid solution in the step (b) is 1 (8-12), and can be 1:8, 1:9, 1:10, 1:11, 1:12 and the like.

Preferably, the time for the impregnation in step (b) is 5-15min, such as 5min, 6min, 8min, 10min, 12min, 15min, etc.

Preferably, the concentration of the soaping agent in step (b) is 0.1-1g/L, and may be, for example, 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1g/L, etc.

Preferably, the temperature of the soaping in the step (b) is 70-80 ℃ (for example, 70 ℃, 72 ℃, 74 ℃, 76 ℃, 78 ℃, 80 ℃ and the like can be achieved), and the time of the soaping is 5-15min (for example, 5min, 6min, 8min, 10min, 12min, 15min and the like can be achieved).

Preferably, said dye liquor of step (c) comprises, on a consistency basis: dye 0.01-5% o.w.f. (which may be, for example, 0.01% o.w.f., 0.05% o.w.f., 0.1% o.w.f., 0.2% o.w.f., 0.3% o.w.f., 0.4% o.w.f., 0.6% o.w.f., 0.8% o.w.f., 1% o.w.f., 2% o.w.f., 3% o.w.f., 4% o.w.f., 5% o.w.f., 0.6g/L, 0.8g/L, 2% o.w.f., 3% o.w.f., 4% o.w.f., 5% o.w.f, etc.), leveling agent 0.5-2g/L (which may be, for example, 0.5g/L, 0.6g/L, 0.8g/L, 1g/L, 1.2g/L, 1.4g/L, 1.6g/L, 1.8g/L, 2g/L, 1.g/L, 1.9 g/L, 1.g/L, 3g/L, and the balance being water.

Preferably, the filament of step (c) is nylon filament, the dye is acid dye, the temperature of the impregnation is 90-100 ℃ (for example, 90 ℃, 92 ℃, 94 ℃, 96 ℃, 98 ℃, 100 ℃ and the like), the time of the impregnation is 20-40min (for example, 20min, 22min, 24min, 26min, 28min, 30min, 32min, 34min, 36min, 38min, 40min and the like);

preferably, the filament in step (c) is a polyester filament, the dye is a disperse dye, the temperature of the impregnation is 120-.

Preferably, the dyed fabric is a light-color fabric, and the soaping specifically comprises the following steps: the dyed fabric is hot-washed in water of 50-70 deg.C (such as 50 deg.C, 52 deg.C, 54 deg.C, 56 deg.C, 58 deg.C, 60 deg.C, 62 deg.C, 64 deg.C, 68 deg.C, 70 deg.C, etc.) for 5-15min (such as 5min, 6min, 8min, 10min, 12min, 15min, etc.).

Preferably, the fabric obtained after dyeing is a medium-dark fabric, and the soaping specifically comprises the following steps: the dyed fabric is placed in acid soap solution of 50-70 deg.C (such as 50 deg.C, 52 deg.C, 54 deg.C, 56 deg.C, 58 deg.C, 60 deg.C, 62 deg.C, 64 deg.C, 68 deg.C, 70 deg.C, etc.) for soaping for 10-30min (such as 10min, 12min, 14min, 16min, 18min, 20min, 22min, 24min, 26min, 28min, 30min, etc.), and then fixed in fixing agent solution of 75-85 deg.C (such as 75 deg.C, 76 deg.C, 77 deg.C, 78 deg.C, 79 deg.C, 80 deg.C, 81 deg.C, 82 deg.C, 83 deg.C, 84 deg.C, 85 deg.C) for 10-30min (such as 10min, 12min, 14min, 16min, 18min, 20min, 22min, 24min, 26min, 28min, 30min, etc.).

Preferably, the concentration of the acid soap solution is 0.1 to 1g/L, and may be, for example, 0.1g/L, 0.2g/L, 0.3g/L, 0.4g/L, 0.5g/L, 0.6g/L, 0.7g/L, 0.8g/L, 0.9g/L, 1g/L, etc.

Preferably, the concentration of the fixer solution is 1-3g/L, and may be, for example, 1g/L, 1.2g/L, 1.4g/L, 1.6g/L, 1.8g/L, 2g/L, 2.2g/L, 2.4g/L, 2.6g/L, 2.8g/L, 3g/L, and the like.

Preferably, the temperature for the setting is 130-140 ℃, for example, 130 ℃, 132 ℃, 134 ℃, 136 ℃, 138 ℃, 140 ℃ and the like.

Preferably, the overfeeding amount of the setting is 5-15%, such as 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, etc., and the vehicle speed of the setting is 20-25 yards, such as 20 yards, 21 yards, 22 yards, 23 yards, 24 yards, 25 yards, etc.

Preferably, a soft finishing agent is added in the shaping process.

Preferably, the concentration of the soft finish is 0.5 to 2g/L, and may be, for example, 0.5g/L, 0.6g/L, 0.8g/L, 1g/L, 1.2g/L, 1.4g/L, 1.6g/L, 1.8g/L, 2g/L, and the like.

Preferably, the preparation method of the silk-like elastic knitted fabric comprises the following steps:

(1) weaving: the non-elastic yarns and the elastic yarns are knitted by adopting a weft plain knitting method, each path of non-elastic yarns formed by knitting completely covers each path of elastic yarns, and a blank fabric is obtained by circular knitting;

(2) presetting: presetting blank fabric at the temperature of 180-200 ℃ by 5-15% of overfeed amount and 20-25 yards of vehicle speed;

(3) pretreatment: dipping the pre-shaped fabric in the pre-treatment slurry;

the dyeing in the step (4) is a medium-dark dyeing dye, and the pretreatment slurry comprises the following components in concentration: glacial acetic acid 0.1-1g/L, deoiling agent 0.1-1g/L and water in balance, wherein the dipping temperature is 75-85 ℃;

dyeing is carried out to obtain light-colored dye, and the pretreatment slurry comprises the following components in concentration: 0.1-0.5g/L of degreasing agent, 1-3g/L of refining enzyme, 8-12g/L of hydrogen peroxide, 0.1-0.5g/L of deoxyenzyme and 0.1-1g/L of hydrogen peroxide stabilizer, wherein the dipping temperature is 90-100 ℃;

(4) copper ammonia dyeing: soaking the pretreated fabric in warm water at 35-45 ℃, sequentially adding a chelating agent, preserving heat for 20-40min at 35-45 ℃, adding a dye, preserving heat for 20-40min at 35-45 ℃, finally adding anhydrous sodium sulphate, preserving heat for 5-15min at 35-45 ℃, raising the temperature to 55-65 ℃ at the heating rate of 20 ℃/min, preserving heat for 5-15min, dyeing, adding soda, preserving heat for 20-30min, and finishing dyeing the copper ammonia fiber in the fabric;

(5) and (3) post-treatment: soaking the fabric dyed with cuprammonium in glacial acetic acid solution for 5-15min, adding soaping agent, and soaping at 70-80 deg.C for 5-15 min;

(6) dyeing filaments: soaking the post-treated fabric in a dye solution to finish dyeing of polyester filaments or nylon filaments in the fabric;

the filaments in the step (6) are nylon filaments, the dye is an acid dye, the dipping temperature is 90-100 ℃, and the dipping time is 20-40 min;

the filaments in the step (6) are polyester filaments, the dye is disperse dye, the dipping temperature is 120-130 ℃, and the dipping time is 20-40 min;

(7) soaping: the dyed fabric is light-colored, and is put into water with the temperature of 50-70 ℃ for hot washing for 5-15 min; the dyed fabric is medium-dark fabric, the dyed fabric is placed in an acid soap solution at 50-70 ℃ for soaping for 10-30min, and then the color is fixed in a color fixing agent solution at 75-85 ℃ for 10-30 min;

(8) shaping: and (3) shaping the fabric after the soaping at the temperature of 130-.

In a third aspect, the present invention provides the use of a cuprammonium imitation silk elastic knit according to the first aspect in the manufacture of intimate apparel;

preferably, the intimate apparel comprises an undergarment or a T-shirt.

Compared with the prior art, the invention has the following beneficial effects:

(1) the copper ammonia silk-like elastic knitted fabric has silk-like suspension feeling, smooth hand feeling, cool touch feeling, sweat absorption and quick drying and ultraviolet resistance, and solves the problems of poor strength of copper ammonia fibers, difficulty in weaving and static electrification of chemical fibers. The garment made of the fabric is good in wearing comfort and suitable for being made into close-fitting garments such as underwear and T-shirts.

(2) The cuprammonium silk-like elastic knitted fabric provided by the invention has good cool contact feeling, namely the transient maximum heat flow is 0.25-0.31W/cm²(ii) a Has excellent moisture absorption and quick drying performance, the water absorption is 4-8s, and the residual rate of diffused moisture is 4.2-6.2% in 60 min; and has good ultraviolet protection property, and the UPF value is 50 +.

Drawings

FIG. 1 is a schematic front view of a silk-like elastic knitted fabric provided in example 1;

wherein, 1 is a cold-feeling filament yarn, and 2 is a composite yarn containing copper ammonia fiber.

FIG. 2 is a schematic view of the reverse side structure of the silk-like elastic knitted fabric provided in example 1;

wherein 3 is elastic yarn.

FIG. 3 is a schematic side view of the silk-like elastic knitted fabric according to example 1;

wherein, 1 is a cold-feeling filament yarn, 2 is a composite yarn containing copper ammonia fiber, and 3 is an elastic yarn.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.

FIG. 1 is a schematic front view of a silk-like elastic knitted fabric provided in example 1; wherein, 1 is a cold-feeling filament yarn, and 2 is a composite yarn containing copper ammonia fiber. FIG. 2 is a schematic view of the reverse side structure of the silk-like elastic knitted fabric provided in example 1; wherein 3 is elastic yarn. Fig. 3 is a schematic structural diagram of a side of the silk-like elastic knitted fabric provided in example 1. As can be seen from fig. 1 in combination with fig. 2 and 3, the fabric is formed by alternately and circularly weaving 2 paths of cold-feeling filaments and 1 path of copper ammonia fiber composite filaments, and the cold-feeling filaments of each path and the copper ammonia fiber composite filaments of each path are respectively covered on the 1 path of spandex filaments.

The following preparations and examples and component sources are as follows: cool feeling nylon filament (manufacturer: Qingdao jin Qi Hui New Material Co., Ltd.), nylon cuprammonium composite filament (manufacturer: Xuhua chemical Co., Ltd.), spandex filament (manufacturer: Xiaoxing spandex Co., Ltd.), cool feeling polyester filament (manufacturer: Qingdao jin Qi Hui New Material Co., Ltd.) and polyester cuprammonium composite filament (manufacturer: Xuhua chemical Co., Ltd.); a degreasing agent (manufacturer: chemical industry, model 1155), a refining enzyme (manufacturer: chemical industry BM-300), hydrogen peroxide (manufacturer: chemical industry, mass concentration of 27 wt%), a deoxidizer enzyme (manufacturer: chemical industry XS064) and a hydrogen peroxide stabilizer (manufacturer: chemical industry ABS); chelating agent (manufacturer: chemical GS-3032); soaping agent (manufacturer: chemical KSA); acid dyes (manufacturer: infectious chemical industry), disperse dyes (manufacturer: infectious chemical industry), leveling agents (manufacturer: infectious chemical industry BW-951) and soft finishing agents (manufacturer: infectious chemical industry QS).

Example 1

The embodiment provides a silk-like elastic knitted fabric, which is formed by alternately and circularly weaving 2 paths of cold-feeling nylon filaments and 1 path of nylon-copper-ammonia composite filaments, wherein each path of cold-feeling nylon filament and each path of nylon-copper-ammonia composite filament are respectively covered on 1 path of spandex filament, the coil lengths of the cold-feeling nylon filament and the nylon-copper-ammonia composite filament are both 29cm/100 needles, the fineness of the cold-feeling nylon filament is 40D, and the fineness of the nylon-copper-ammonia composite filament is 68T; the fineness of the spandex filament is 20D, the loop length of the spandex filament is 8.8cm/100 needles, and the mass ratio of the inelastic yarn to the elastic yarn is 8: 2.

The preparation method of the silk-like elastic knitted fabric comprises the following steps:

(1) weaving: 2 paths of cold-feeling nylon filaments, 1 path of nylon copper ammonia composite wires and spandex filaments are woven on a 32-needle weft knitting machine, the 2 paths of cold-feeling nylon filaments and the 1 path of nylon copper ammonia composite wires are alternately and circularly woven, each path of cold-feeling nylon filaments and the nylon copper ammonia composite wires which are formed by weaving completely cover each path of spandex filaments, and 106g/m is obtained by circularly weaving²The blank fabric of (2);

(2) presetting: presetting blank fabric at 195 ℃ by the overfeeding amount of 10% and the vehicle speed of 22 yards;

(3) pretreatment: dipping the pre-set fabric in pre-treatment slurry, wherein the pre-treatment slurry comprises the following components in concentration: 0.3g/L of degreasing agent, 2g/L of refining enzyme, 10g/L of hydrogen peroxide, 0.3g/L of deoxidizer, 0.5g/L of hydrogen peroxide stabilizer and the balance of water, wherein the bath ratio is 1:10, and the dipping temperature is 95 ℃;

(4) copper ammonia dyeing: soaking the pretreated fabric in warm water at 40 ℃, sequentially adding 0.25g/L of chelating agent at 40 ℃, continuously adding dye for 30min, finally continuously adding 10g/L of anhydrous sodium sulphate for 30min, preserving heat at 40 ℃ for 10min, heating to 60 ℃ at the heating rate of 20 ℃/min, preserving heat for 10min for dyeing, continuously adding 5g/L of soda, preserving heat for 25min, and finishing dyeing the copper ammonia fiber in the fabric;

the dye in the step (4) comprises the following components: active deep blue 2GLN 0.01% o.w.f., active red 3BS (709) 0.0251% o.w.f., and active yellow 3RS (344) 0.044% o.w.f.;

(5) and (3) post-treatment: soaking the fabric dyed with cuprammonium in 0.5g/L glacial acetic acid water solution for 10min at a bath ratio of 1:10, and adding 0.5g/L soaping agent to carry out soaping at 75 ℃ for 10 min;

(6) dyeing filaments: soaking the post-treated fabric in a dye solution to finish dyeing the nylon filaments in the fabric; the dye liquor comprises the following components in percentage by concentration: acid dyes (isolon blue NHF-S0.0234% o.w.f., isolon red NHF-S0.0377% o.w.f., and isolon yellow NHF-S0.040% o.w.f.), a leveling agent of 1g/L and glacial acetic acid of 0.6g/L, and the balance of water, wherein the dipping temperature is 95 ℃, and the dipping time is 30 min;

(7) soaping: placing the dyed fabric in water of 60 ℃ for hot washing for 10 min;

(8) shaping: and (3) setting the soaped fabric at 135 ℃ with the overfeed amount of 10% and the vehicle speed of 22 yards, and adding 1g/L of soft finishing agent in the setting process to obtain the silk-like elastic knitted fabric.

Example 2

The embodiment provides a silk-like elastic knitted fabric, which is formed by alternately and circularly weaving 2 paths of cold-feeling nylon filaments and 1 path of nylon-copper-ammonia composite filaments, wherein each path of cold-feeling nylon filament and each path of nylon-copper-ammonia composite filament are respectively covered on 1 path of spandex filament, the coil lengths of the cold-feeling nylon filament and the nylon-copper-ammonia composite filament are both 29cm/100 needles, the fineness of the cold-feeling nylon filament is 40D, and the fineness of the nylon-copper-ammonia composite filament is 68T; the fineness of the spandex filament is 20D, the loop length of the spandex filament is 10cm/100 needles, and the mass ratio of the inelastic yarn to the elastic yarn is 8: 2.

The preparation method of the silk-like elastic knitted fabric comprises the following steps:

(1) weaving: 2 paths of cold-feeling nylon filaments, 1 path of nylon copper ammonia composite wires and spandex filaments are woven on a 32-needle weft knitting machine, the 2 paths of cold-feeling nylon filaments and the 1 path of nylon copper ammonia composite wires are alternately and circularly woven, each path of cold-feeling nylon filaments and the nylon copper ammonia composite wires which are formed by weaving completely cover each path of spandex filaments, and 120g/m is obtained by circularly weaving²The blank fabric of (2);

(2) presetting: presetting blank fabric at 195 ℃ by the overfeeding amount of 10% and the vehicle speed of 22 yards;

(3) pretreatment: dipping the pre-set fabric in pre-treatment slurry, wherein the pre-treatment slurry comprises the following components in concentration: 0.5g/L of pure glacial acetic acid, 0.5g/L of deoiling agent and the balance of water, wherein the bath ratio is 1:10, and the dipping temperature is 95 ℃;

(4) copper ammonia dyeing: soaking the pretreated fabric in warm water at 40 ℃, sequentially adding 0.25g/L of chelating agent at 40 ℃, continuously adding dye at 40 ℃ for 30min, continuously adding 10g/L of anhydrous sodium sulphate for 30min, preserving heat at 40 ℃ for 10min, heating to 60 ℃ at a heating rate of 20 ℃/min, preserving heat for 10min for dyeing, continuously adding 5g/L of sodium carbonate for 30min, preserving heat at 60 ℃ for 25min, and finishing dyeing the copper ammonia fiber in the fabric;

the dye in the step (4) comprises the following components: active black WNN 3.4% o.w.f., active dark 2GLN 0.4% o.w.f., and active yellow 3RS 0.1% o.w.f.;

(5) and (3) post-treatment: soaking the fabric dyed with cuprammonium in 0.5g/L glacial acetic acid water solution for 10min at a bath ratio of 1:10, and adding 0.5g/L soaping agent to carry out soaping at 75 ℃ for 10 min;

(6) dyeing filaments: soaking the post-treated fabric in a dye solution to finish dyeing the nylon filaments in the fabric; the dye liquor comprises the following components in percentage by concentration: acid dyes (Niuqu blue black M-R3.23% o.w.f. and Niuqu blue navy M-BRS 0.193% o.w.f.), a leveling agent 2g/L and glacial acetic acid 1g/L, and the balance of water, wherein the dipping temperature is 95 ℃, and the dipping time is 30 min;

(7) soaping: placing the dyed fabric in water of 60 ℃ for hot washing for 10 min;

(8) shaping: and (3) setting the soaped fabric at 135 ℃ with the overfeed amount of 10% and the vehicle speed of 22 yards, and adding 1g/L of soft finishing agent in the setting process to obtain the silk-like elastic knitted fabric.

Example 3

The embodiment provides a silk-like elastic knitted fabric, which is formed by alternately and circularly weaving 2 paths of cold-feeling polyester filaments and 1 path of polyester copper ammonia composite filaments, wherein each path of cold-feeling polyester filaments and each path of polyester copper ammonia composite filaments cover 1 path of spandex filaments, the coil lengths of the cold-feeling polyester filaments and the polyester copper ammonia composite filaments are both 30cm/100 needles, the fineness of the cold-feeling polyester filaments is 40D, and the fineness of the polyester copper ammonia composite filaments is 86T; the fineness of the spandex filament is 20D, the loop length of the spandex filament is 8.5cm/100 needles, and the mass ratio of the inelastic yarn to the elastic yarn is 8: 2.

The preparation method of the silk-like elastic knitted fabric comprises the following steps:

(1) weaving: 2 paths of cold-feeling polyester filaments, 1 path of polyester cuprammonium composite filaments and spandex filaments are woven on a 32-needle weft knitting machine, the 2 paths of cold-feeling polyester filaments and the 1 path of polyester cuprammonium composite filaments are alternately and circularly woven, each path of cold-feeling polyester filaments and each path of polyester cuprammonium composite filaments formed by weaving completely cover each path of spandex filaments, and 130g/m is obtained by circularly weaving²The blank fabric of (2);

(2) presetting: presetting blank fabric at 195 ℃ by the overfeeding amount of 10% and the vehicle speed of 22 yards;

(3) pretreatment: dipping the pre-set fabric in pre-treatment slurry, wherein the pre-treatment slurry comprises the following components in concentration: 0.4g/L of degreasing agent, 2g/L of refining enzyme, 10g/L of hydrogen peroxide, 0.3g/L of deoxidizer, 0.5g/L of hydrogen peroxide stabilizer and the balance of water, wherein the bath ratio is 1:10, and the dipping temperature is 95 ℃;

(4) copper ammonia dyeing: soaking the pretreated fabric in warm water at 40 ℃, sequentially adding 0.25g/L of chelating agent at 40 ℃, continuously adding dye at 40 ℃ for 30min, continuously adding 10g/L of anhydrous sodium sulphate at 40 ℃ for 30min, keeping the temperature for 10min, heating to 60 ℃ at the heating rate of 20 ℃/min, keeping the temperature for 10min, dyeing, continuously adding 5g/L of sodium carbonate at 60 ℃ for 30min, keeping the temperature for 25min, and finishing dyeing the copper ammonia fiber in the fabric;

the dye in the step (4) comprises the following components: active deep blue 2GLN 0.01% o.w.f., active red 3BS (709) 0.0251% o.w.f., and active yellow 3RS (344) 0.044% o.w.f.;

(5) and (3) post-treatment: soaking the fabric dyed with cuprammonium in 0.5g/L glacial acetic acid water solution for 10min at a bath ratio of 1:10, and adding 0.5g/L soaping agent to carry out soaping at 75 ℃ for 10 min;

(6) dyeing filaments: soaking the post-treated fabric in a dye solution to finish dyeing of polyester filaments in the fabric; the dye liquor comprises the following components in percentage by concentration: disperse dyes (disperse blue BAQ-LE (520) 0.0574% o.w.f., disperse red RAQ-LE (532) 0.0373% o.w.f., and disperse yellow YAQ-LE (540) 0.0396% o.w.f.), leveling agent 1g/L and glacial acetic acid 0.6g/L, balance water, the temperature of the impregnation is 95 ℃, and the time of the impregnation is 30 min;

(7) soaping: placing the dyed fabric in water of 60 ℃ for hot washing for 10 min;

(8) shaping: and (3) setting the soaped fabric at 135 ℃ with the overfeed amount of 10% and the vehicle speed of 22 yards, and adding 1g/L of soft finishing agent in the setting process to obtain the silk-like elastic knitted fabric.

Example 4

The embodiment provides a silk-like elastic knitted fabric, which is different from the embodiment 1 only in that the front surface of the fabric is formed by alternately and circularly weaving 1 path of cold nylon filament yarns and 1 path of nylon copper ammonia composite yarns.

Example 5

The embodiment provides a silk-like elastic knitted fabric, which is different from the embodiment 1 only in that the front surface of the fabric is formed by alternately and circularly weaving 3 paths of cold-feeling nylon filaments and 1 path of nylon-copper-ammonia composite filaments.

Example 6

This example provides a silk-like elastic knitted fabric, which is different from example 1 only in that the loop length of the inelastic yarn is 24cm/100 stitches.

Example 7

This example provides a silk-like elastic knitted fabric, which is different from example 1 only in that the loop length of the inelastic yarn is 34cm/100 needles.

Example 8

This example provides a silk-like elastic knitted fabric, which is different from example 1 only in that the loop length of spandex filament is 8cm/100 stitches.

Example 9

This example provides a silk-like elastic knitted fabric, which is different from example 1 only in that the loop length of spandex filament is 13cm/100 stitches.

Comparative example 1

The comparison example provides a silk-like elastic knitted fabric, which is different from the fabric in the example 1 only in that the fabric only comprises nylon cuprammonia composite filaments and spandex filaments, and the other conditions are the same as the example 1.

Comparative example 2

The comparison example provides a silk-like elastic knitted fabric, which is different from the fabric in the example 1 only in that the fabric only comprises cold-feeling nylon filaments and spandex filaments, and the other conditions are the same as the example 1.

And (3) performance testing:

the silk-like elastic knitted fabrics provided in the above examples 1 to 9 and comparative examples 1 to 3 were subjected to the following tests:

(1) and (3) contact cool feeling test: respectively shearing each sample to be tested in an environment with the temperature of 20 +/-2 ℃ and the relative humidity of 65 +/-4% for at least 1h by using a contact cold and warm feeling tester (KES-F7THERMO LABOII), vertically placing a hot plate on the sample, and recording the Q-max value, namely the contact cold feeling (transient maximum heat flow) of the sample with the unit of W/cm²The average of 5 test data is taken for each sample to be tested.

(2) The gram weight of the fabric is as follows: electronic gram weight instrument

(3) Moisture absorption and quick drying performance: the water absorption of the fabric was tested with reference to JIS water absorption test method (dripping method), and quick-drying was tested using a diffusible residual water content apparatus.

(4) Ultraviolet Protection Factor (UPF): test according to JIS L1925.2019.

The specific test results are shown in table 1:

TABLE 1

As shown in the test data in Table 1, the cuprammonium rayon silk-like elastic knitted fabric provided by the invention has good cool contact feeling, namely the transient maximum heat flow is 0.25-0.31W/cm²(ii) a Has excellent moisture absorption and quick drying performance, the water absorption is 4-8s, and the residual rate of diffused moisture is 4.2-6.2% in 60 min; and has good ultraviolet protection property, and the UPF value is 50 +. The cuprammonium imitated silk elastic knitted fabric provided by the invention has the effects of silk-like suspension feeling, smooth hand feeling, cool touch feeling, sweat absorption, quick drying and ultraviolet resistance, and simultaneously solves the problems of poor strength, difficult weaving and chemical fiber lifting of cuprammonium fibersThe problem of static electricity.

As is clear from comparison between example 1 and examples 4 and 5, the fabric is formed by alternately and circularly weaving 2 paths of cold-feeling nylon filaments and 1 path of nylon cuprammonium composite filaments, so that the comprehensive performance of the contact cool feeling and the moisture absorption quick-drying performance of the fabric is more excellent, and the situation that the contact cool feeling is too low due to too few cold-feeling filaments and the moisture absorption quick-drying performance is reduced due to too few copper-ammonia fiber composite filaments due to too many cold-feeling filaments is avoided.

From the comparison between example 1 and examples 6 and 7, it is understood that when the loop length of the non-elastic yarn is too small, the moisture absorption and quick drying performance is reduced due to too close space between the threads of the fabric; when the coil length of the non-elastic yarn is too large, the contact cool feeling and the ultraviolet resistance are reduced to some extent due to too loose threads of the fabric. As is clear from the comparison between example 1 and examples 8 and 9, when the loop length of the elastic yarn is too small, the cool feeling and the ultraviolet ray resistance are reduced due to the loose fabric; the length of the loop of the elastic yarn is too large, and the moisture absorption and quick drying performance is reduced to some extent due to the too tight fabric.

As is clear from the comparison between example 1 and comparative example 1, the cool feeling of the fabric in contact is remarkably reduced without adding the 1-pass cool feeling filament. As can be seen from the comparison between example 1 and comparative example 2, the moisture absorption and quick drying performance is remarkably reduced without adding the nylon-copper-ammonia composite yarn.

The applicant states that the invention is illustrated by the above examples to the application of the cuprammonium silk-like elastic knitted fabric and the preparation method thereof, but the invention is not limited to the above examples, that is, the invention is not meant to be implemented only by relying on the above examples. It should be understood by those skilled in the art that any modification of the present invention, equivalent replacement of the raw materials of the product of the present invention and addition of auxiliary components, selection of specific modes, etc., are within the scope of protection and disclosure of the present invention.