A soft, skin-friendly and highly fluffy comfortable knitted fabric and its preparation process

Abstract

The present invention provides a preparation process for a soft, skin-friendly and highly fluffy comfortable knitted fabric, comprising the following steps: First, prepare white yarn and colored spun yarn. The white yarn is mainly obtained by spinning cotton fibers, and the colored spun yarn is mainly prepared by dyeing cotton fibers and subjecting them to combing and low-twist processes; Second, weave the colored spun yarn, white yarn and spandex filaments in a knitting machine to obtain a fabric blank with a three-layer separation structure; Finally, subject the fabric blank to dyeing and finishing processes to obtain a soft, skin-friendly and highly fluffy comfortable knitted fabric. In the embodiment of the present invention, the white yarn, colored spun yarn and spandex filaments are woven into a fabric with a three-layer separation structure, which is fluffy in structure, easy to store air, thinner and heat-retaining, and has a soft touch during use. The white yarn and colored spun yarn are locked by spandex filaments, with a stable structure and high dimensional stability of the fabric, and it is not easy to shrink. During dyeing and finishing, different auxiliaries are used in softening during pre-treatment, softening during shaping and final shaping respectively to improve the comfort of the fabric and avoid the fabric from becoming astringent.

Description

Technical Field

[0001] The present invention relates to the technical field of knitting, and particularly relates to a comfortable knitted fabric with soft skin-friendly and high fluffiness and a preparation process thereof. Background Art

[0002] Cotton belongs to natural fiber, which is not easy to breed bacteria, does not generate static electricity, is easy to take care of and has low cost. Pure cotton clothing made of cotton has many advantages, such as comfortable to wear, good air permeability, soft and non-irritating to the skin, so it is deeply welcomed by users. However, pure cotton clothing has many disadvantages. Cotton products are easy to absorb moisture and expand, with a large shrinkage rate, and then shrink and deform. Moreover, after being washed many times, the hand feeling will become hard and astringent, far inferior to man-made chemical fiber materials such as polyester. Summary of the Invention

[0003] In order to solve at least one technical problem in the prior art, a comfortable knitted fabric with soft skin-friendly and high fluffiness and a preparation process thereof are provided. The fabric has high fluffiness and is not easy to shrink. To achieve the above technical purposes, the technical solutions adopted in the embodiments of the present invention are as follows:

[0004] In a first aspect, an embodiment of the present invention provides a preparation process of a comfortable knitted fabric with soft skin-friendly and high fluffiness, including the following steps:

[0005] First, prepare white yarn and colored spun yarn. The white yarn is mainly obtained by spinning cotton fibers, and the colored spun yarn is mainly prepared by dyeing cotton fibers and then subjecting them to combing and low-twist processes;

[0006] Secondly, weave the colored spun yarn, white yarn and spandex yarn in a knitting machine to obtain a fabric blank with a three-layer separated structure;

[0007] Finally, subject the fabric blank to a dyeing and finishing process to obtain a comfortable knitted fabric with soft skin-friendly and high fluffiness.

[0008] Further, the average length of the cotton fibers is greater than 27 mm, and the fiber strength of the cotton fibers is 3-4 grades;

[0009] The spinning method of the white yarn is combed compact spinning or combed compact siro spinning, and the yarn count of the white yarn is 40S.

[0010] Further, the spinning method of the colored spun yarn is combed compact spinning or combed compact siro spinning, and the yarn count of the colored spun yarn is 40S.

[0011] Further, the fabric greige is woven on a weft knitting machine with 24 needles per inch. The upper needle bed and the lower needle cylinder of the weft knitting machine are filled with needles. Both the upper needle bed and the lower needle cylinder are composed of high needles and low needles, and the high needles and low needles are arranged alternately. The high needles on the upper needle bed correspond to the low needles on the lower needle cylinder, and the low needles on the upper needle bed correspond to the high needles on the lower needle cylinder. The specific knitting process takes six courses as a cycle, repeating continuously to obtain the fabric greige;

[0012] The knitting methods for the first to the sixth courses are any one of the following methods:

[0013] (1) In the first course, the high needles and low needles on the upper needle bed are floats, and the high needles on the lower needle cylinder form loops, and the low needles either form festoons or are floats;

[0014] (2) In the second course, the high needles on the upper needle bed either form loops, form festoons or are floats, and the low needles are floats, and the high needles and low needles on the lower needle cylinder are both floats;

[0015] (3) In the third course, the high needles and low needles on the upper needle bed are both floats, and the high needles on the lower needle cylinder either form festoons or are floats, and the low needles form loops;

[0016] (4) In the fourth course, the high needles on the upper needle bed either form festoons or are floats, and the low needles form loops, and the high needles and low needles on the lower needle cylinder are both floats;

[0017] (5) In the fifth course, the high needles on the upper needle bed form festoons, and the low needles are floats, and the high needles and low needles on the lower needle cylinder both form festoons and are floats;

[0018] (6) In the sixth course, the high needles on the upper needle bed are floats, and the low needles form festoons, and the high needles and low needles on the lower needle cylinder are both floats and form festoons;

[0019] In the first and second courses, color-spun yarns are fed in, and the spandex yarn is fed in together with the color-spun yarn;

[0020] In the third and fourth courses, white yarns are fed in, and the spandex yarn is fed in together with the white yarn;

[0021] In the fifth and sixth courses, only spandex yarns are fed in;

[0022] Or, (1) In the first course, the high needles on the upper needle bed and the high needles on the lower needle cylinder both form festoons, and the low needles on the upper needle bed and the low needles on the lower needle cylinder are both floats.

[0023] (2) In the second course, the high needles on the lower needle cylinder form loops, and the high needles, low needles on the upper needle bed and the low needles on the lower needle cylinder are all floats.

[0024] (3) In the third course, the high needles on the upper needle bed form loops, and the low needles on the upper needle bed, the high needles and low needles on the lower needle cylinder are all floats.

[0025] (4) In the fourth course, the low needles on the upper needle bed and the low needles on the lower needle cylinder both form festoons, and the high needles on the upper needle bed and the high needles on the lower needle cylinder are both floats.

[0026] (5) In the fifth course, the low needles on the lower needle cylinder form loops, and the high needles, low needles on the upper needle bed and the high needles on the lower needle cylinder are all floats.

[0027] (6) The low needles on the upper dial of the sixth course form loops, while the high needles on the upper dial, the high needles and low needles on the lower cylinder are all floaters.

[0028] Spandex filaments are fed in the first and fourth courses;

[0029] Colored spun yarns are fed in the second and third courses, and the spandex filaments are fed together with the colored spun yarns;

[0030] White yarns are fed in the fifth and sixth courses, and the spandex filaments are fed together with the white yarns;

[0031] Or, (1) The high needles on the upper dial of the first course are floaters and the low needles are also floaters, while the high needles on the lower cylinder form loops and the low needles are floaters.

[0032] (2) The high needles on the upper dial of the second course are floaters and the low needles are also floaters, while the high needles on the lower cylinder are floaters and the low needles form loops.

[0033] (3) The high needles on the upper dial of the third course form loops and the low needles form tucks, while the high needles and low needles on the lower cylinder are both floaters.

[0034] (4) The high needles on the upper dial of the fourth course form tucks and the low needles form loops, while the high needles and low needles on the lower cylinder are both floaters.

[0035] (5) The high needles on the upper dial of the fifth course form tucks and the low needles are floaters, while the high needles on the lower cylinder form tucks and the low needles are floaters.

[0036] (6) The high needles on the upper dial of the sixth course are floaters and the low needles form tucks, while the high needles on the lower cylinder are floaters and the low needles form tucks.

[0037] Colored spun yarns are fed in the first and third courses, and the spandex filaments are fed together with the colored spun yarns;

[0038] White yarns are fed in the second and fourth courses, and the spandex filaments are fed together with the white yarns;

[0039] Spandex filaments are fed in both the fifth and sixth courses.

[0040] Furthermore, the yarn count of the spandex filaments is 20D or 30D, and the yarn length is 0.75 - 1.25 mm;

[0041] The yarn length of the white yarns is 2.45 - 3.15 mm;

[0042] The yarn length of the colored spun yarns is 2.45 - 3.3 mm.

[0043] Furthermore, the dyeing and finishing process includes the following steps:

[0044] Step S1, pre-setting: Thread the fabric greige and feed it into the setting machine. Set the temperature of the setting machine to 190 - 200 °C and the vehicle speed to 22 - 23 m / min;

[0045] Step S2, light bleaching: Feed the fabric and water into a normal-temperature overflow machine, set the liquor ratio to 1:8 - 1:10, add 2 - 3 g / L of hydrogen peroxide and 1.5 - 2 g / L of scouring enzyme, and keep it warm at 75 - 85 °C for 20 - 40 min;

[0046] Step S3, washing: Drain the water from the normal-temperature overflow machine and then refill with water. Set the liquor ratio to 1:8 - 1:10, add 0.5 - 0.8 g / L of glacial acetic acid and 0.15 - 0.2% owf of deoxygenase respectively, and keep it warm at 35 - 45 °C for 8 - 12 min;

[0047] Step S4, softening: Drain the water from the normal-temperature overflow machine and then refill with water. Set the liquor ratio to 1:8 - 1:10, add the first auxiliary agent, run at normal temperature for 9 - 11 min, then drain the water, and dehydrate the fabric greige through a dehydrator;

[0048] Step S5, setting and softening: Feed the fabric into a stenter. Add the second auxiliary agent into the trough. Set the padding rate to 70% - 75%, the temperature to 165 - 170 °C, and the machine speed to 25 - 30 m / min, so that the fabric evenly absorbs the second auxiliary agent and passes through the stenter at a uniform speed;

[0049] Step S6, raising treatment: Carry out raising treatment on the front side and / or the back side of the fabric greige;

[0050] Step S7, shearing treatment: Carry out shearing treatment on the front side and / or the back side of the fabric greige. Feed the greige into a shearing machine, and the distance between the flat knife and the round knife of the shearing machine is 0.2 - 0.3 mm, and the speed is 28 - 30 m / min;

[0051] Step S8, final setting: Feed the fabric into a stenter. Add the third auxiliary agent into the trough. Set the padding rate to 70% - 75%, the temperature to 165 - 170 °C, and the machine speed to 20 - 25 m / min.

[0052] Further, the first auxiliary agent is softening agent S200, and the addition amount of the first auxiliary agent is 3 - 4%;

[0053] The second auxiliary agent is a bulking agent, and the addition amount of the bulking agent is 15 - 20 g / L;

[0054] The third auxiliary agent is a smoothing agent, and the addition amount of the smoothing agent is 15 - 20 g / L.

[0055] Further, in Step S5, after drying, the front side and the back side of the fabric greige are respectively subjected to raising treatment. In any raising treatment, the fabric greige passes through a 36-roller raising machine and at least one 42-roller raising machine for continuous raising treatment successively;

[0056] Among them, in the 36-roller raising machine, the tension of the rear fabric guide roller is set to 8-9%, the tension of the front fabric guide roller is set to 5-7%, the fabric speed is 20-25 m / min, the rotational speed of the clockwise roller is 28-38 r / min, and the rotational speed of the counterclockwise roller is 22-33 r / min;

[0057] In the 42-roller raising machine, the tension of the rear fabric guide roller is set to 3-12%, the tension of the front fabric guide roller is set to 3-12%, the fabric speed is 20-25 m / min, the rotational speed of the clockwise roller is 38-78 r / min, and the rotational speed of the counterclockwise roller is 33-68 r / min.

[0058] Furthermore, the fabric grey cloth in the dyeing and finishing process has at least one of the following performance parameters:

[0059] The width of the fabric grey cloth after pre-setting is 174-175 cm, and the gram weight is 240-250 g / m 2 ;

[0060] The fluffiness of the fabric grey cloth after softening in setting is 10 cm 3 / g or more;

[0061] The fuzz coverage rate of the fabric grey cloth after raising treatment is greater than or equal to 90%, and the hair loss rate is lower than 0.5%;

[0062] The hair length of the fabric grey cloth after shearing treatment is not more than 0.3 mm;

[0063] The width of the fabric after final setting is 171-172 cm, and the gram weight is 220-230 g / m 2 ;

[0064] The shrinkage rate of the fabric after final setting is -4 to 0% in the warp direction and -3 to 0% in the weft direction.

[0065] In the second aspect, the embodiments of the present invention also provide a soft, skin-friendly and highly fluffy comfortable knitted fabric prepared by the above preparation process.

[0066] The beneficial effects brought by the technical solution provided by the embodiments of the present invention are:

[0067] In the embodiment of the present invention, white yarn, color-spun yarn and spandex yarn are woven into a fabric with a three-layer separated structure, and the white yarn and the color-spun yarn are alternately formed into a double-sided stripe effect. Compared with the conventional rib fabric, the structure is highly fluffy and easy to store air. When used, it is lighter, heat-retaining, and has a soft touch. The white yarn and the color-spun yarn are locked by the spandex yarn, the structure is stable, the dimensional stability of the fabric is high, and it is not easy to shrink, thereby improving the deformation of the cotton fabric due to shrinkage. The white yarn is obtained by spinning cotton fibers, and the color-spun yarn is prepared by dyeing and combing low-twist processes of cotton fibers. Compared with chemical fiber products, it has a high safety level, and the formaldehyde residue meets the infant standard. In the dyeing and finishing process of the fabric, different softeners are used in softening, setting softening and finished product setting respectively to improve the comfort of the fabric and avoid the fabric from being astringent. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 It is the knitting needle arrangement diagram in the embodiment of the present invention.

[0069] Figure 2 It is the cam arrangement diagram in Embodiment 1 of the present invention.

[0070] Figure 3 It is the cam arrangement diagram in Embodiment 2 of the present invention.

[0071] Figure 4 It is the cam arrangement diagram in Embodiment 3 of the present invention.

[0072] Among them, 1-6 represent threading the yarn from the first path to the sixth path, ∪ and ∩ represent tuck cams, ∨ and ∧ represent loop cams, and — represents float cam. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0073] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0074] In the first aspect, the embodiment of the present invention provides a preparation process of a soft, skin-friendly and highly fluffy comfortable knitted fabric, including the following steps:

[0075] First, prepare white yarn and color-spun yarn. The white yarn is mainly obtained by spinning cotton fibers, and the color-spun yarn is mainly prepared by dyeing and combing low-twist processes of cotton fibers;

[0076] Secondly, the color-spun yarn, white yarn and spandex yarn are woven in a knitting machine to obtain a fabric blank with a three-layer separated structure;

[0077] Finally, the fabric blank is subjected to dyeing and finishing process treatment to obtain a soft, skin-friendly and highly fluffy comfortable knitted fabric.

[0078] It should be noted that the three-layer separation structure includes a surface layer, an intermediate layer, and a lining layer. The surface layer and / or the lining layer are the colored spun yarn and the white yarn, and the intermediate layer is the spandex filament.

[0079] Furthermore, the average length of the cotton fiber is greater than 27 mm, and the fiber strength of the cotton fiber is 3 to 4 grades;

[0080] The spinning method of the white yarn is combed compact spinning or combed compact siro spinning, and the yarn count of the white yarn is 40S;

[0081] Furthermore, the spinning method of the colored spun yarn is combed compact spinning or combed compact siro spinning, and the yarn count of the colored spun yarn is 40S.

[0082] It can be understood that the cotton fiber is white in color, fine in texture, soft and delicate to the touch, and has high strength. It is non-irritating and non-allergenic to the skin and is not prone to generating static electricity. The colored spun yarn is prepared by a combed low-twist process. The combed low-twist color spinning process mixes various fibers of different colors, and through drafting and bunching, the yarns with similar colors are mixed, and finally colored yarns are formed. The colored spun yarn obtained in this way is safer and healthier, and no harmful substances are generated during the preparation process. In particular, the formaldehyde residue index meets the standards for infant use.

[0083] Furthermore, the fabric greige is knitted on a weft knitting machine with a gauge of 36 needles per inch. The upper needle cylinder and the lower needle cylinder of the weft knitting machine are filled with needles. The upper needle cylinder and the lower needle cylinder are both composed of high needles and low needles, and the high needles and low needles are arranged alternately. The high needles on the upper needle cylinder correspond to the low needles on the lower needle cylinder, and the low needles on the upper needle cylinder correspond to the high needles on the lower needle cylinder. The specific knitting process takes six courses as a cycle and repeats continuously to obtain the fabric greige;

[0084] The knitting method for the first to the sixth courses is any one of the following methods:

[0085] (1) In the first course, the high needles and low needles on the upper needle cylinder are floaters, and the high needles on the lower needle cylinder form loops, and the low needles either form festoons or are floaters;

[0086] (2) In the second course, the high needles on the upper needle cylinder either form loops or form festoons or are floaters, and the low needles are floaters, and the high needles and low needles on the lower needle cylinder are both floaters;

[0087] (3) In the third course, the high needles and low needles on the upper needle cylinder are both floaters, and the high needles on the lower needle cylinder either form festoons or are floaters, and the low needles form loops;

[0088] (4) In the fourth course, the high needles on the upper needle cylinder either form festoons or are floaters, and the low needles form loops, and the high needles and low needles on the lower needle cylinder are both floaters;

[0089] (5) In the fifth course, the high needles on the upper needle cylinder form festoons, and the low needles are floaters, and the high needles and low needles on the lower needle cylinder both form festoons and are floaters;

[0090] (6) On the sixth course, the high needles of the top dial are float stitches and the low needles are tuck stitches; on the bottom cylinder, the high needles are float stitches and the low needles are tuck stitches.

[0091] In the first and second courses, colored spun yarns are fed in, and the spandex yarn is fed in together with the colored spun yarn.

[0092] In the third and fourth courses, white yarns are fed in, and the spandex yarn is fed in together with the white yarn.

[0093] In the fifth and sixth courses, only spandex yarns are fed in.

[0094] Or, (1) On the first course, both the high needles of the top dial and the high needles of the bottom cylinder are tuck stitches, and both the low needles of the top dial and the low needles of the bottom cylinder are float stitches.

[0095] (2) On the second course, the high needles of the bottom cylinder form loops, and the high needles, low needles of the top dial, and low needles of the bottom cylinder are all float stitches.

[0096] (3) On the third course, the high needles of the top dial form loops, and the low needles of the top dial, high needles, and low needles of the bottom cylinder are all float stitches.

[0097] (4) On the fourth course, both the low needles of the top dial and the low needles of the bottom cylinder are tuck stitches, and the high needles of the top dial and the high needles of the bottom cylinder are all float stitches.

[0098] (5) On the fifth course, the low needles of the bottom cylinder form loops, and the high needles, low needles of the top dial, and high needles of the bottom cylinder are all float stitches.

[0099] (6) On the sixth course, the low needles of the top dial form loops, and the high needles of the top dial, high needles, and low needles of the bottom cylinder are all float stitches.

[0100] In the first and fourth courses, spandex yarns are fed in.

[0101] In the second and third courses, colored spun yarns are fed in, and the spandex yarn is fed in together with the colored spun yarn.

[0102] In the fifth and sixth courses, white yarns are fed in, and the spandex yarn is fed in together with the white yarn.

[0103] Or, (1) On the first course, the high and low needles of the top dial are float stitches, the high needles of the bottom cylinder form loops, and the low needles of the bottom cylinder are float stitches.

[0104] (2) On the second course, the high and low needles of the top dial are float stitches, the high needles of the bottom cylinder are float stitches, and the low needles of the bottom cylinder form loops.

[0105] (3) On the third course, the high needles of the top dial form loops and the low needles are tuck stitches, and the high and low needles of the bottom cylinder are both float stitches.

[0106] (4) On the fourth course, the high needles of the top dial are tuck stitches and the low needles form loops, and the high and low needles of the bottom cylinder are both float stitches.

[0107] (5) On the fifth course, the high needles of the top dial are tuck stitches and the low needles are float stitches, and the high needles and low needles of the bottom cylinder are both tuck stitches and float stitches.

[0108] (6) On the sixth course, the high needles on the dial float and the low needles tuck; on the cylinder, the high needles float and the low needles tuck.

[0109] On the first and third courses, colored spun yarns are fed in, and spandex filaments are fed in together with the colored spun yarns.

[0110] On the second and fourth courses, white yarns are fed in, and spandex filaments are fed in together with the white yarns.

[0111] On the fifth and sixth courses, spandex filaments are fed in.

[0112] It should be noted that the fabric greige woven by any of the above knitting methods has a three-layer separation structure, and double-sided stripe effects are formed alternately by the white yarns and the colored spun yarns. Compared with conventional ribbed fabrics, the fabric greige is highly fluffy in structure, easy to store air, thinner and more heat-retaining during use, with a soft touch. The white yarns and the colored spun yarns are locked by spandex filaments, the structure is stable, the dimensional stability of the fabric is high, and it is not easy to shrink, thus improving the deformation of cotton fabrics due to shrinkage.

[0113] Furthermore, the yarn count of the spandex filaments is 20D or 30D, and the yarn length is 0.75 - 1.25mm, for example, it can be 0.75mm, 0.85mm, 0.95mm, 1.05mm, 1.15mm, 1.25mm, etc.

[0114] The yarn length of the white yarns is 2.45 - 3.15mm, for example, it can be 2.45mm, 2.65mm, 2.85mm, 3.05mm, 3.15mm, etc.

[0115] The yarn length of the colored spun yarns is 2.45 - 3.3mm, for example, it can be 2.45mm, 2.65mm, 2.85mm, 3.05mm, 3.3mm, etc.

[0116] Furthermore, the dyeing and finishing process includes the following steps:

[0117] Step S1, pre-setting: Thread the fabric greige with guide cloth, feed the cloth into the setting machine, and set the temperature of the setting machine to 190 - 200°C and the vehicle speed to 22 - 23m / min; Through pre-setting, the internal stress of the fabric greige can be eliminated, making it easier to control quality indicators such as fabric width and grams per square meter.

[0118] Step S2, light bleaching: Feed the cloth and water into the normal-temperature overflow machine, set the liquor ratio to 1:8 - 1:10, add 2 - 3g / L of hydrogen peroxide and 1.5 - 2g / L of refining enzyme, and keep it warm at 75 - 85°C for 20 - 40min; It should be noted that the fabric greige after pre-setting is prone to yellowing and reduces whiteness. Through light bleaching treatment, the whiteness of the fabric greige can be ensured, making the fabric greige keep bright and clear.

[0119] Step S3, Scouring: After draining the water from the normal-temperature overflow machine, fill it with water again. Set the liquor ratio to 1:8 - 1:10, add 0.5 - 0.8 g / L of glacial acetic acid and 0.15 - 0.2% owf of deoxygenase respectively, and keep it warm at 35 - 45 °C for 8 - 12 min. The fabric grey cloth after light bleaching will have residues of reagents such as alkali and hydrogen peroxide, resulting in an excessive pH value of the fabric grey cloth and damaging the dye structure, making the color shade of subsequent dyeing incorrect. Therefore, scouring is carried out to neutralize the pH value of the fabric grey cloth and deoxygenate it to make the quality of the fabric grey cloth qualified.

[0120] Step S4, Softening: After draining the water from the normal-temperature overflow machine, fill it with water again. Set the liquor ratio to 1:8 - 1:10, add the first auxiliary agent, run it at normal temperature for 9 - 11 min, then drain the water, and dehydrate the fabric grey cloth through a dehydrator. The dehydrated fabric grey cloth has a soft handfeel and is not astringent.

[0121] Step S5, Setting and Softening: Feed the cloth into the stenter. Add the second auxiliary agent into the trough. Set the liquor pickup rate to 70% - 75%, the temperature to 165 - 170 °C, and the machine speed to 25 - 30 m / min, so that the cloth evenly absorbs the second auxiliary agent and passes through the stenter at a uniform speed.

[0122] Step S6, Raising Treatment: Carry out raising treatment on the front side and / or the back side of the fabric grey cloth.

[0123] Step S7, Shearing Treatment: Carry out shearing treatment on the front side and / or the back side of the fabric grey cloth. Feed the grey cloth into the shearing machine. The distance between the flat knife and the round knife of the shearing machine is 0.2 - 0.3 mm, and the speed is 28 - 30 m / min.

[0124] Step S8, Final Setting: Feed the cloth into the stenter. Add the third auxiliary agent into the trough. Set the liquor pickup rate to 70% - 75%, the temperature to 165 - 170 °C, and the machine speed to 20 - 25 m / min. This step can prevent the fabric from having creases, chicken claw marks, etc., keep the fabric flat, and have good dimensional stability.

[0125] Further, the first auxiliary agent is softener S200, and the addition amount of the first auxiliary agent is 3 - 4%, for example, it can be 3.02%, 3.04%, 3.06%, 3.08%, 4%, etc.

[0126] The second auxiliary agent is a bulking agent, and the addition amount of the bulking agent is 15 - 20 g / L, for example, it can be 15 g / L, 16 g / L, 17 g / L, 18 g / L, 19 g / L, 20 g / L, etc.

[0127] The third auxiliary agent is a smoothing agent, and the addition amount of the smoothing agent is 15 - 20 g / L, for example, it can be 15 g / L, 16 g / L, 17 g / L, 18 g / L, 19 g / L, 20 g / L, etc.

[0128] It should be noted that in steps S4, S5 and S8, a 10-section oven setting machine is used to process the fabric grey fabric successively, and different softeners are used in different steps to achieve different effects. Among them, the soft film S200 can make the fabric grey fabric feel softer, the fluffing agent can make the fabric grey fabric easier to fluff, which is beneficial to subsequent raising and shearing processes, and the smoothing agent can make the fabric grey fabric feel softer and smoother at the same time.

[0129] Further, in step S5, the front and back sides of the dried fabric grey fabric are respectively subjected to raising treatment. In any raising treatment, the fabric grey fabric passes through a 36-roll raising machine and at least one 42-roll raising machine successively for continuous raising. For example, four 42-roll raising machines can be used.

[0130] Among them, in the 36-roll raising machine, the tension of the rear guide cloth roll is set to 8-9%, the tension of the front guide cloth roll is set to 5-7%, the cloth speed is 20-25 m / min, the rotation speed of the forward needle roll is 28-38 r / min, and the rotation speed of the reverse needle roll is 22-33 r / min;

[0131] In the 42-roll raising machine, the tension of the rear guide cloth roll is set to 3-12%, the tension of the front guide cloth roll is set to 3-12%, the cloth speed is 20-25 m / min, the rotation speed of the forward needle roll is 38-78 r / min, and the rotation speed of the reverse needle roll is 33-68 r / min.

[0132] Further, the fabric grey fabric in the dyeing and finishing process has at least one of the following performance parameters:

[0133] The width of the fabric grey fabric after pre-setting is 174-175 cm, and the gram weight is 240-250 g / m 2 ;

[0134] The fluffiness of the fabric grey fabric after softening in setting is more than 10 cm 3 / g;

[0135] The fuzz coverage rate of the fabric grey fabric after raising treatment is greater than or equal to 90%, and the hair loss rate is less than 0.5%;

[0136] The hair length of the fabric grey fabric after shearing treatment is not more than 0.3 mm;

[0137] The width of the fabric after final setting is 171-172 cm, and the gram weight is 220-230 g / m 2 ;

[0138] The shrinkage rate of the fabric after final setting is -4-0% in the warp direction and -3-0% in the weft direction.

[0139] Second aspect, the embodiments of the present invention further provide a soft, skin-friendly, highly fluffy and comfortable knitted fabric prepared by the above preparation process.

[0140] In the following specific embodiments, operations not specified in terms of conditions are carried out under conventional conditions or conditions recommended by the manufacturer. All raw materials not specified in terms of the manufacturer and specifications are conventional products that can be obtained through commercial procurement.

[0141] Example 1

[0142] A preparation process for a soft, skin-friendly, highly fluffy and comfortable knitted fabric includes the following steps:

[0143] First, combed compact spinning is used to spin cotton fibers into white yarn, and the cotton fibers are prepared into colored spun yarn through dyeing and combed low-twist processes. Among them, the average length of the cotton fibers is 30 mm, the fiber strength of the cotton fibers is grade 4, and the yarn counts of both the white yarn and the colored spun yarn are 40S;

[0144] Secondly, the colored spun yarn, white yarn and spandex yarn are knitted in a weft knitting machine with a needle gauge of 24 needles per inch. The upper needle plate and the lower needle cylinder of the weft knitting machine are filled with needles. Both the upper needle plate and the lower needle cylinder are composed of high needles and low needles, and the high needles and low needles are arranged alternately. The high needles on the upper needle plate correspond to the low needles on the lower needle cylinder, and the low needles on the upper needle plate correspond to the high needles on the lower needle cylinder. As Figure 1 shown in the knitting needle arrangement diagram, the specific knitting process is as Figure 2 shown, and is:

[0145] On the first pass, the high needles and low needles on the upper needle plate are floaters, the high needles on the lower needle cylinder form loops, and the low needles form festoons;

[0146] On the second pass, the high needles on the upper needle plate form loops and the low needles form festoons, and both the high needles and low needles on the lower needle cylinder are floaters;

[0147] On the third pass, both the high needles and low needles on the upper needle plate are floaters, the high needles on the lower needle cylinder form festoons, and the low needles form loops;

[0148] On the fourth pass, the high needles on the upper needle plate form festoons and the low needles form loops, and the high needles and low needles on the lower needle cylinder are floaters;

[0149] On the fifth pass, the high needles on the upper needle plate form festoons and the low needles are floaters, and the high needles and low needles on the lower needle cylinder form festoons and are floaters;

[0150] On the sixth pass, the high needles on the upper needle plate are floaters and the low needles form festoons, and the high needles and low needles on the lower needle cylinder are floaters and form festoons;

[0151] The first pass and the second pass feed the colored spun yarn, and the spandex yarn with a count of 20D is fed together with the colored spun yarn;

[0152] The third pass and the fourth pass feed the white yarn, and the spandex yarn with a count of 20D is fed together with the white yarn;

[0153] Both the fifth and sixth paths feed spandex yarns with a count of 30D;

[0154] Among them, the yarn lengths of the white yarn and the colored spun yarn are both 3.15 mm, and the yarn length of the spandex yarn is 1.25 mm;

[0155] The seventh to twelfth paths repeat the knitting method of the first to sixth paths above, and with six paths as a cycle, repeating continuously, to obtain a fabric greige with a three-layer separation structure;

[0156] Finally, the fabric greige is subjected to a dyeing and finishing process according to the following steps:

[0157] Step S1, pre-setting: Thread the fabric greige with guiding cloth, feed the cloth into the setting machine, set the temperature of the setting machine to 195 °C and the vehicle speed to 22 m / min. After pre-setting, the width of the fabric greige off the machine is 175 cm and the gram weight is 240 g / m 2 ;

[0158] Step S2, light bleaching: Feed the cloth and water into the normal-temperature overflow machine, with a liquor ratio of 1:8, add 2 g / L hydrogen peroxide and 1.5 g / L refining enzyme, and keep warm at 80 °C for 30 min;

[0159] Step S3, scouring: Drain the water from the normal-temperature overflow machine and then add water again, with a liquor ratio of 1:8, add 0.5 g / L glacial acetic acid and 0.15% owf deoxidase, and keep warm at 40 °C for 10 min;

[0160] Step S4, softening: Drain the water from the normal-temperature overflow machine and then add water again, with a liquor ratio of 1:8, add 3% softening agent S200, run for 10 min at normal temperature and then drain the water, and dehydrate the fabric greige through a dehydrator;

[0161] Step S5, setting and softening: Feed the cloth into the setting machine, add 15 g / L bulking agent in the trough, set the liquor pickup rate to 70%, the temperature to 165 °C, and the vehicle speed to 25 m / min, so that the cloth evenly absorbs the bulking agent and passes through the setting machine at a uniform speed. The bulkiness of the fabric greige after setting and softening is 10.42 cm 3 / g;

[0162] Step S6, raising treatment: The fabric greige is subjected to reverse raising treatment and then forward raising treatment successively. When raising, feed the fabric greige into the raising machine and continuously raise it by a 36-roller raising machine and four 42-roller raising machines. Among them, the parameters of the raising machine during reverse raising are shown in Table 1:

[0163] Table 1 Process parameters of the raising machine during reverse raising

[0164] Parameter The first machine The second machine The third machine The fourth machine The fifth machine Tension of the rear fabric guide roller (%) 8 8～10 8～10 6～8 5～8 Tension of the front fabric guide roller (%) 6 8～10 8～10 6～8 5～8 Fabric speed (m / min) 21～23 22～24 22～24 22～24 22～24 Rotational speed of the clockwise roller (r / min) 30～35 45～50 50～55 60～65 65～70 Rotational speed of the counterclockwise roller (r / min) 25～30 40～45 45～50 55～60 60～65

[0165] When the front side is raised, the parameters of the raising machine are shown in Table 2:

[0166] Table 2 Process parameters of the raising machine when the front side is raised

[0167] Parameter The first machine The second machine The third machine The fourth machine The fifth machine Tension of the rear fabric guide roller (%) 8 8～10 8～10 6～8 4～6 Tension of the front fabric guide roller (%) 6 8～10 8～10 6～8 4～6 Fabric speed (m / min) 22～23 23～25 23～25 23～25 23～25 Rotational speed of the clockwise roller (r / min) 30～35 40～45 50～55 55～60 70～75 Rotational speed of the counterclockwise roller (r / min) 25～30 35～40 45～50 55～60 60～65

[0168] The flocking coverage rate of the fabric grey cloth after flocking treatment reaches 95%, and the finished product hair removal rate is 0.4%;

[0169] Step S7, shearing treatment: The fabric grey cloth is successively subjected to reverse shearing treatment and front shearing treatment on a shearing machine. The distance between the flat knife and the round knife in the shearing machine is set to 0.2 mm, the speed is 28 m / min, and the hair length of the fabric grey cloth after shearing treatment is 0.2 mm;

[0170] Step S8, finished product shaping: Feed the cloth into the shaping machine, add 15 g / L smoothing agent into the trough, set the liquor pick-up rate to 70%, the temperature to 165 °C, and the vehicle speed to 20 m / min. The width of the fabric after finished product shaping is 171 cm, and the gram weight is 220 g / m 2 , and the shrinkage rate is -4% in the warp direction and 0% in the weft direction.

[0171] Example 2

[0172] A preparation process of a soft, skin-friendly and highly fluffy comfortable knitted fabric includes the following steps:

[0173] First, cotton fibers are spun into white yarn through combed compact spinning, and the cotton fibers are prepared into colored spun yarn through dyeing and combed low-twist processes. Among them, the average length of the cotton fibers is 28 mm, the fiber strength of the cotton fibers is 4 grades, and the yarn count of the white yarn and the colored spun yarn is 40S;

[0174] Secondly, the colored spun yarn, white yarn and spandex yarn are knitted in a weft knitting machine with 24 needles per inch. The upper needle disc and the lower needle cylinder of the weft knitting machine are filled with needles. Both the upper needle disc and the lower needle cylinder are composed of high needles and low needles, and the high needles and low needles are arranged alternately. The high needles on the upper needle disc correspond to the low needles on the lower needle cylinder, and the low needles on the upper needle disc correspond to the high needles on the lower needle cylinder. As Figure 1 shown in the knitting needle arrangement diagram, the specific knitting process is as Figure 3 shown, which is:

[0175] (1) On the first pass, the high needles on the upper needle disc and the high needles on the lower needle cylinder are both tucking, and the low needles on the upper needle disc and the low needles on the lower needle cylinder are both floats.

[0176] (2) On the second pass, the high needles on the lower needle cylinder form loops, and the high needles, low needles on the upper needle disc and the low needles on the lower needle cylinder are all floats.

[0177] (3) In the third pass, the high needles on the top dial form loops, while the low needles on the top dial, the high needles and low needles on the bottom cylinder are all floating yarns.

[0178] (4) In the fourth pass, the low needles on the top dial and the low needles on the bottom cylinder both form tucks, while the high needles on the top dial and the high needles on the bottom cylinder are all floating yarns.

[0179] (5) In the fifth pass, the low needles on the bottom cylinder form loops, while the high needles and low needles on the top dial and the high needles on the bottom cylinder are all floating yarns.

[0180] (6) In the sixth pass, the low needles on the top dial form loops, while the high needles on the top dial, the high needles and low needles on the bottom cylinder are all floating yarns.

[0181] In the first and fourth passes, spandex yarns with a fineness of 30D are fed in;

[0182] In the second and third passes, colored spun yarns are fed in, and the spandex yarns with a fineness of 30D are fed in together with the colored spun yarns;

[0183] In the fifth and sixth passes, white yarns are fed in, and the spandex yarns with a fineness of 20D are fed in together with the white yarns;

[0184] Among them, the length of the spandex yarn is 0.75mm, and the lengths of the colored spun yarn and the white yarn are both 2.45mm.

[0185] From the seventh pass to the twelfth pass, the knitting method of the above first pass to the sixth pass is repeated, and taking six passes as a cycle, it goes round and round to obtain the fabric greige.

[0186] Finally, the fabric greige is subjected to the dyeing and finishing process according to the following steps:

[0187] Step S1, pre-setting: Thread the fabric greige with guide cloth, feed the cloth into the setting machine, set the temperature of the setting machine to 195°C and the vehicle speed to 23m / min. After pre-setting, the width of the fabric greige when it comes off the machine is 175cm, and the gram weight is 250g / m 2 ;

[0188] Step S2, light bleaching: Feed the cloth and water into the normal-temperature overflow machine, with a liquor ratio of 1:10, add 3g / L hydrogen peroxide and 2g / L refining enzyme, and keep it warm at 80°C for 30min;

[0189] Step S3, scouring: Drain the water from the normal-temperature overflow machine and then fill it with water again, with a liquor ratio of 1:10, add 0.8g / L glacial acetic acid and 0.2% owf deoxidizing enzyme, and keep it warm at 40°C for 10min;

[0190] Step S4, softening: Drain the water from the normal-temperature overflow machine and then fill it with water again, with a liquor ratio of 1:10, add 4% softening agent S200, run it at normal temperature for 10min and then drain the water, and dehydrate the fabric greige through a dehydrator;

[0191] Step S5, setting and softening: Feed the fabric into the setting machine, add 20 g / L of fluffing agent into the trough, set the liquor pickup rate at 75%, the temperature at 170 °C, and the machine speed at 30 m / min, so that the fabric evenly absorbs the softening agent and passes through the setting machine at a constant speed. The fluffiness of the fabric blank after setting and softening is 10.83 cm 3 / g;

[0192] Step S6, raising treatment: Perform reverse raising treatment and then forward raising treatment on the fabric blank. When raising, feed the fabric blank into the raising machine and continuously raise it successively by a 36-roller raising machine and four 42-roller raising machines. Among them, the parameters of the raising machine during reverse raising are shown in Table 3:

[0193] Table 3 Process parameters of the raising machine during reverse raising

[0194] Parameter The first machine The second machine The third machine The fourth machine The fifth machine Tension of the rear fabric guide roller (%) 8 8～10 8～10 6～8 5～8 Tension of the front fabric guide roller (%) 6 8～10 8～10 6～8 5～8 Fabric speed (m / min) 21～23 22～24 22～24 22～24 22～24 Rotational speed of the clockwise roller (r / min) 30～35 45～50 50～55 60～65 65～70 Rotational speed of the counterclockwise roller (r / min) 25～30 40～45 45～50 55～60 60～65

[0195] The flocking coverage rate of the fabric blank after raising treatment is 92%, and the finished product hair removal rate is 0.3%;

[0196] The parameters of the raising machine during forward raising are shown in Table 4:

[0197] Table 4 Process parameters of the raising machine during forward raising

[0198]

[0199]

[0200] Step S7, shearing treatment: Perform reverse shearing treatment and then forward shearing treatment on the fabric blank on the shearing machine. Set the distance between the flat knife and the round knife in the shearing machine at 0.3 mm and the speed at 30 m / min. The hair length of the fabric blank after shearing treatment is 0.25 mm;

[0201] Step S8, finished product setting: Feed the fabric into the setting machine, add 20 g / L of smoothing agent into the trough, set the liquor pickup rate at 75%, the temperature at 170 °C, and the machine speed at 25 m / min. The width of the fabric after finished product setting is 171 cm, and the gram weight is 230 g / m 2 , and the shrinkage rate is -4% in the warp direction and -2% in the weft direction.

[0202] Example 3

[0203] A preparation process for a soft, skin-friendly and highly fluffy comfortable knitted fabric, comprising the following steps:

[0204] First, cotton fibers are spun into white yarn through combed compact spinning. The colored spun yarn is prepared by dyeing and combed low-twist process of the cotton fibers. Among them, the average length of the cotton fibers is 32mm, the fiber strength of the cotton fibers is grade 3, and the yarn count of the white yarn and the colored spun yarn is 40S.

[0205] Secondly, the colored spun yarn, white yarn and spandex are knitted in a weft knitting machine with a machine gauge of 24 needles per inch. The upper needle bed and the lower needle cylinder of the weft knitting machine are filled with needles. Both the upper needle bed and the lower needle cylinder are composed of high needles and low needles, and the high needles and low needles are arranged alternately. The high needles on the upper needle bed correspond to the low needles on the lower needle cylinder, and the low needles on the upper needle bed correspond to the high needles on the lower needle cylinder. As Figure 1 shown in the knitting needle arrangement diagram, the specific knitting process is as Figure 4 shown as:

[0206] (1) In the first pass, the high needles and low needles on the upper needle bed are floating, and the high needles on the lower needle cylinder form loops and the low needles are floating.

[0207] (2) In the second pass, the high needles and low needles on the upper needle bed are floating, and the high needles on the lower needle cylinder are floating and the low needles form loops.

[0208] (3) In the third pass, the high needles on the upper needle bed form loops and the low needles form tucks, and both the high needles and low needles on the lower needle cylinder are floating.

[0209] (4) In the fourth pass, the high needles on the upper needle bed form tucks and the low needles form loops, and both the high needles and low needles on the lower needle cylinder are floating.

[0210] (5) In the fifth pass, the high needles on the upper needle bed form tucks and the low needles are floating, and the high needles and low needles on the lower needle cylinder form tucks and are floating.

[0211] (6) In the sixth pass, the high needles on the upper needle bed are floating and the low needles form tucks, and the high needles and low needles on the lower needle cylinder are floating and form tucks.

[0212] The colored spun yarn is fed in the first and third passes, and the spandex is fed together with the colored spun yarn.

[0213] The white yarn is fed in the second and fourth passes, and the spandex is fed together with the white yarn.

[0214] Only spandex is fed in the fifth and sixth passes.

[0215] The colored spun yarn is fed in the first and third passes, and the 30D spandex is fed together with the colored spun yarn.

[0216] The white yarn is fed in the second and fourth passes, and the 30D spandex is fed together with the white yarn.

[0217] Only 30D spandex is fed in the fifth and sixth passes.

[0218] Among them, the length of the colored spun yarn is 3.3 mm, the length of the white yarn is 2.5 mm, and the length of the spandex filament is 1.05 mm;

[0219] The knitting method of the first to sixth paths is repeated for the seventh to twelfth paths, and taking six paths as a cycle, it goes round and round to obtain a fabric greige with a three-layer separation structure;

[0220] Finally, the fabric greige is subjected to a dyeing and finishing process according to the following steps:

[0221] Step S1, pre-setting: Thread the fabric greige with guiding cloth and feed it into the setting machine. Set the temperature of the setting machine to 195 °C, the vehicle speed to 22 m / min. After pre-setting, the width of the fabric greige off the machine is 175 cm, and the gram weight is 245 g / m 2 ;

[0222] Step S2, light bleaching: Feed the fabric and water into the normal-temperature overflow machine. The bath ratio is 1:8. Add 2 g / L hydrogen peroxide and 1.5 g / L refining enzyme, and keep it warm at 80 °C for 30 min;

[0223] Step S3, washing: Drain the water from the normal-temperature overflow machine and then fill it with water again. The bath ratio is 1:8. Add 0.5 g / L glacial acetic acid and 0.15% owf deoxidizing enzyme, and keep it warm at 40 °C for 10 min;

[0224] Step S4, softening: Drain the water from the normal-temperature overflow machine and then fill it with water again. The bath ratio is 1:8. Add 3.5% softening agent S200, run it at normal temperature for 10 min and then drain the water. Dehydrate the fabric greige through a dehydrator;

[0225] Step S5, setting and softening: Feed the fabric into the setting machine. Add 15 g / L bulking agent to the padding trough. Set the padding rate to 70%, the temperature to 165 °C, and the vehicle speed to 25 m / min, so that the fabric evenly soaks up the bulking agent and passes through the setting machine at a constant speed. The bulkiness of the fabric greige after setting and softening is 10.38 cm 3 / g.

[0226] Step S6, raising treatment: Carry out reverse raising treatment and then forward raising treatment on the fabric greige. When raising, feed the fabric greige into the raising machine and continuously raise it by 1 36-roller raising machine and 4 42-roller raising machines successively. Among them, the parameters of the raising machine during reverse raising are shown in Table 5:

[0227] Table 5 Process parameters of the raising machine during reverse raising

[0228] Parameter The first machine The second machine The third machine The fourth machine The fifth machine Tension of the rear fabric guide roller (%) 8 8～10 8～10 6～8 5～8 Tension of the front fabric guide roller (%) 6 8～10 8～10 6～8 5～8 Fabric speed (m / min) 21～23 22～24 22～24 22～24 22～24 Rotational speed of the clockwise roller (r / min) 30～35 45～50 50～55 60～65 65～70 Rotational speed of the counterclockwise roller (r / min) 25～30 40～45 45～50 55～60 60～65

[0229] The parameters of the raising machine during forward raising are shown in Table 6:

[0230] Table 6 Process parameters of the raising machine during front-side raising

[0231] Parameter The first machine The second machine The third machine The fourth machine The fifth machine Tension of the rear fabric guide roller (%) 8 8～10 8～10 6～8 4～6 Tension of the front fabric guide roller (%) 6 8～10 8～10 6～8 4～6 Fabric speed (m / min) 22～23 23～25 23～25 23～25 23～25 Rotational speed of the clockwise roller (r / min) 30～35 40～45 50～55 55～60 70～75 Rotational speed of the counterclockwise roller (r / min) 25～30 35～40 45～50 55～60 60～65

[0232] The fuzz coverage rate of the fabric greige after raising treatment reaches 90%, and the finished product hair removal rate is 0.5%.

[0233] Step S7, shearing treatment: The fabric greige is successively subjected to reverse shearing treatment and front-side shearing treatment on a shearing machine. Set the distance between the flat knife and the round knife in the shearing machine to 0.3 mm, the speed to 28 m / min, and the hair length of the fabric greige after shearing treatment to 0.3 mm;

[0234] Step S8, finished product setting: Feed the fabric into the setting machine, add 15 g / L smoothing agent into the trough, set the liquor pickup rate to 70%, the temperature to 165 °C, and the vehicle speed to 20 m / min. The width of the fabric after finished product setting at the exit of the machine is 171 cm, and the gram weight is 225 g / m 2 , and the shrinkage rate is -4% in the warp direction and -2% in the weft direction.

[0235] Comparative example:

[0236] A preparation process of a cotton fleece fabric, comprising the following steps:

[0237] Step 1: Prepare the greige fabric: By mass fraction, 92 parts of white yarn and 8 parts of spandex fiber are woven on a 24-needle 34-inch double-sided weft knitting circular knitting machine to obtain the greige fabric. Among them, the yarn count of the white yarn is 40S, the yarn count of the spandex fiber is 30D, and the weaving structure is a weft knitting double rib structure:

[0238] Step 2: Dyeing: Place the greige fabric in a dyeing cylinder for dyeing to obtain the dyed greige fabric:

[0239] Step 3: Drying and setting: Feed the fabric into the setting machine, add softener into the trough of the setting machine, set the liquor pickup rate to 70%, the temperature to 165 °C, and the vehicle speed to 25 m / min, so that the fabric evenly soaks up the softener and passes through each section of the drying oven at a constant speed to obtain the dried greige fabric;

[0240] Step 4: Raising treatment: The greige fabric obtained in Step 3 is successively subjected to reverse raising treatment and front-side raising treatment. When raising, feed the fabric greige into the raising machine and continuously raise it front and back by 1 36-roller raising machine and 4 42-roller raising machines. The parameters of the raising machine during raising are the same as those of the raising machine in Example 1;

[0241] Step 5: Shearing treatment: The greige fabric obtained in Step 4 is successively subjected to reverse shearing treatment and front-side shearing treatment on a shearing machine. Set the distance between the flat knife and the round knife in the shearing machine to 0.3 mm, the speed to 28 m / min, and the hair length of the fabric greige after shearing treatment to 0.3 mm;

[0242] Step 6: Finished product shaping: After step 5, feed the fabric into the shaping machine, set the liquor pickup rate to 70%, the oven temperature to 165 °C, the vehicle speed to 20 m / min, and the gram weight to 255 g / m 2 .

[0243] Application examples

[0244] In this application example, the fabrics provided in Examples 1-3 and Comparative Example 1 were subjected to performance tests. Specifically, according to the method provided in the standard of "GB / T 24442.1-2009 Determination of the compression properties of textiles - Part 1: Constant method - Determination method of bulkiness", the bulkiness of the fabrics was tested, and according to the method provided in the standard of "GB / T 8629-2017 Textiles - Home laundering and drying procedures for testing", the shrinkage of the fabrics was tested. The specific performance indicators are shown in Table 7 below:

[0245] Table 7 Test results of various performance of the fabrics in Examples 1-3 and Comparative Example 1

[0246]

[0247] It should be noted that the gram weight of the fabric in Table 7 is the data after the fabric after the finished product shaping in step 8 of the dyeing and finishing process undergoes the conventional moisture regain process.

[0248] From the test data, it can be seen that compared with the fabric in Comparative Example 1, the soft, skin-friendly and highly bulking comfortable knitted fabric prepared in Examples 1-3 of the present invention has a gram weight that is more than 11% lighter, a bulkiness that is more than 28.5% higher, a higher comfort level, and significantly better shrinkage effect, meeting the usage requirements.

[0249] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A preparation process of a soft, skin-friendly and highly fluffy comfortable knitted fabric, characterized in that, It includes the following steps: First, prepare white yarn and colored spun yarn. The white yarn is mainly obtained by spinning cotton fibers, and the colored spun yarn is mainly prepared by dyeing and combing low-twist processes on cotton fibers. Secondly, weave the colored spun yarn, white yarn and spandex yarn on a knitting machine to obtain a fabric blank with a three-layer separated structure. Finally, perform dyeing and finishing processes on the fabric blank to obtain a soft, skin-friendly and highly fluffy comfortable knitted fabric. The fabric blank is knitted on a weft knitting machine with a gauge of 24 needles per inch. The upper needle bed and the lower needle cylinder of the weft knitting machine are filled with needles. Both the upper needle bed and the lower needle cylinder are composed of high needles and low needles, and the high needles and low needles are arranged alternately. The high needles on the upper needle bed correspond to the low needles on the lower needle cylinder, and the low needles on the upper needle bed correspond to the high needles on the lower needle cylinder. The specific knitting process takes six courses as a cycle and repeats continuously to obtain the fabric blank. Among them, the knitting method for the first to the sixth courses is any one of the following methods: (1) In the first course, the high needles and low needles on the upper needle bed are floaters, and the high needles on the lower needle cylinder form loops, and the low needles are either tucks or floaters. (2) In the second course, the high needles on the upper needle bed form loops, or are tucks or floaters, and the low needles are floaters, and the high needles and low needles on the lower needle cylinder are both floaters. (3) In the third course, the high needles and low needles on the upper needle bed are both floaters, and the high needles on the lower needle cylinder are either tucks or floaters, and the low needles form loops. (4) In the fourth course, the high needles on the upper needle bed are either tucks or floaters, and the low needles form loops, and the high needles and low needles on the lower needle cylinder are both floaters. (5) In the fifth course, the high needles on the upper needle bed are tucks, and the low needles are floaters, and the high needles and low needles on the lower needle cylinder are both tucks and floaters. (6) In the sixth course, the high needles on the upper needle bed are floaters, and the low needles are tucks, and the high needles and low needles on the lower needle cylinder are both floaters and tucks. The colored spun yarn is fed in the first and second courses, and the spandex yarn is fed together with the colored spun yarn. The white yarn is fed in the third and fourth courses, and the spandex yarn is fed together with the white yarn. Only the spandex yarn is fed in the fifth and sixth courses. Or, (1) In the first course, both the high needles on the upper needle bed and the high needles on the lower needle cylinder are tucks, and both the low needles on the upper needle bed and the low needles on the lower needle cylinder are floaters. (2) In the second course, the high needles on the lower needle cylinder form loops, and the high needles, low needles on the upper needle bed and the low needles on the lower needle cylinder are all floaters. (3) In the third course, the high needles on the upper needle bed form loops, and the low needles on the upper needle bed, the high needles and low needles on the lower needle cylinder are all floaters. (4) In the fourth course, both the low needles on the upper needle bed and the low needles on the lower needle cylinder are tucks, and the high needles on the upper needle bed and the high needles on the lower needle cylinder are both floaters. (5) In the fifth course, the low needles on the lower needle cylinder form loops, and the high needles, low needles on the upper needle bed and the high needles on the lower needle cylinder are all floaters. (6) In the sixth course, the low needles on the upper needle bed form loops, and the high needles on the upper needle bed, the high needles and low needles on the lower needle cylinder are all floaters. The spandex yarn is fed in the first and fourth courses. The colored spun yarn is fed in the second and third courses, and the spandex yarn is fed together with the colored spun yarn. The white yarn is fed in the fifth and sixth courses, and the spandex yarn is fed together with the white yarn. Or, (1) In the first course, the high needles and low needles on the upper needle bed are floaters, and the high needles on the lower needle cylinder form loops, and the low needles are floaters. (2) In the second course, the high needles and low needles on the upper needle bed are floaters, and the high needles on the lower needle cylinder are floaters, and the low needles form loops. (3) In the third course, the high needles on the upper needle bed form loops, and the low needles are tucks, and the high needles and low needles on the lower needle cylinder are both floaters. (4) In the fourth course, the high needles on the upper needle bed are tucks, and the low needles form loops, and the high needles and low needles on the lower needle cylinder are both floaters. (5) In the fifth course, the high needles on the upper needle bed are tucks, and the low needles are floaters, and the high needles and low needles on the lower needle cylinder are both tucks and floaters. (6) On the sixth upper dial, high needles float and low needles tuck; on the lower cylinder, high needles float and low needles tuck. In the first and third courses, colored spun yarns are fed, and spandex filaments are fed together with the colored spun yarns. In the second and fourth courses, white yarns are fed, and spandex filaments are fed together with the white yarns. In the fifth and sixth courses, only spandex filaments are fed.

2. The preparation process of the soft, skin-friendly, highly fluffy and comfortable knitted fabric according to claim 1, characterized in that the average length of the cotton fibers is greater than 27 mm, and the fiber strength of the cotton fibers is 3 - 4 grades; the spinning method of the white yarn is combed compact spinning or combed compact siro spinning, and the yarn count of the white yarn is 40S.

3. The preparation process of the soft, skin-friendly, highly fluffy and comfortable knitted fabric according to claim 1, characterized in that the spinning method of the colored spun yarn is combed compact spinning or combed compact siro spinning, and the yarn count of the colored spun yarn is 40S.

4. The preparation process of the soft, skin-friendly, highly fluffy and comfortable knitted fabric according to claim 1, characterized in that the yarn count of the spandex filaments is 20D or 30D, and the thread length is 0.75 - 1.25 mm; the thread length of the white yarn is 2.45 - 3.15 mm; the thread length of the colored spun yarn is 2.45 - 3.3 mm.

5. The preparation process of the soft, skin-friendly, highly fluffy and comfortable knitted fabric according to claim 1, characterized in that the dyeing and finishing process includes the following steps: Step S1, pre-setting: Thread the fabric greige, feed the fabric into the setting machine, set the temperature of the setting machine at 190 - 200 °C and the vehicle speed at 22 - 23 m / min; Step S2, light bleaching: Feed the fabric and water into the normal-temperature overflow machine, set the liquor ratio at 1:8 - 1:10, add 2 - 3 g / L of hydrogen peroxide and 1.5 - 2 g / L of refining enzyme, and keep it warm at 75 - 85 °C for 20 - 40 min; Step S3, scouring: After draining the water from the normal-temperature overflow machine, feed water again, set the liquor ratio at 1:8 - 1:10, add 0.5 - 0.8 g / L of glacial acetic acid and 0.15 - 0.2% owf of deoxygenase respectively, and keep it warm at 35 - 45 °C for 8 - 12 min; Step S4, softening: After draining the water from the normal-temperature overflow machine, feed water again, set the liquor ratio at 1:8 - 1:10, add the first auxiliary agent, run it at normal temperature for 9 - 11 min, then drain the water, and dehydrate the fabric greige through a dehydrator; Step S5, setting and softening: Feed the fabric into the setting machine, add the second auxiliary agent into the trough, set the pick-up rate at 70% - 75%, the temperature at 165 - 170 °C, and the vehicle speed at 25 - 30 m / min, so that the fabric evenly soaks up the second auxiliary agent and passes through the setting machine at a uniform speed; Step S6, raising treatment: Raise the front side and / or the reverse side of the fabric greige; Step S7, shearing treatment: Shear the front side and / or the reverse side of the fabric greige, feed the fabric into the shearing machine, and the distance between the flat knife and the round knife of the shearing machine is 0.2 - 0.3 mm, and the speed is 28 - 30 m / min; Step S8, final setting: Feed the fabric into the setting machine, add the third auxiliary agent into the trough, set the pick-up rate at 70% - 75%, the temperature at 165 - 170 °C, and the vehicle speed at 20 - 25 m / min.

6. The preparation process of the soft, skin-friendly, highly fluffy and comfortable knitted fabric according to claim 5, characterized in that the first auxiliary agent is soft sheet S200, and the addition amount of the first auxiliary agent is 3-4%; the second auxiliary agent is a bulking agent, and the addition amount of the bulking agent is 15-20 g / L; the third auxiliary agent is a smoothing agent, and the addition amount of the smoothing agent is 15-20 g / L.

7. The preparation process of the soft, skin-friendly, highly fluffy and comfortable knitted fabric according to claim 5, characterized in that in step S5, the front and back sides of the dried fabric greige are respectively subjected to raising treatment. In any raising treatment, the fabric greige sequentially passes through a 36-roller raising machine and at least one 42-roller raising machine for continuous raising before and after; wherein, in the 36-roller raising machine, the tension of the rear guide cloth roller is set to 8-9%, the tension of the front guide cloth roller is set to 5-7%, the cloth speed is 20-25 m / min, the rotation speed of the forward needle roller is 28-38 r / min, and the rotation speed of the reverse needle roller is 22-33 r / min; in the 42-roller raising machine, the tension of the rear guide cloth roller is set to 3-12%, the tension of the front guide cloth roller is set to 3-12%, the cloth speed is 20-25 m / min, the rotation speed of the forward needle roller is 38-78 r / min, and the rotation speed of the reverse needle roller is 33-68 r / min.

8. The preparation process of the soft, skin-friendly, highly fluffy and comfortable knitted fabric according to claim 5, characterized in that the fabric greige in the dyeing and finishing process has at least one of the following performance parameters: The width of the fabric greige after pre-setting is 174 - 175 cm, and the gram weight is 240 - 250 g / m 2 ; The fabric greige after shaping and softening has a bulkiness of 10 cm 3 / g or more; the flocking coverage rate of the fabric greige after raising treatment is greater than or equal to 90%, and the hair loss rate is lower than 0.5%; the hair length of the fabric greige after shearing treatment is not greater than 0.3 mm; The width of the fabric after being shaped into the finished product is 171 - 172 cm, and the gram weight is 220 - 230 g / m 2 ; the shrinkage rate of the fabric after finished shaping is -4 to 0% in the warp direction and -3 to 0% in the weft direction.

9. The soft, skin-friendly, highly fluffy and comfortable knitted fabric prepared by the preparation process according to any one of claims 1-8.

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