Preparation method of cotton / modal, polyester and spandex healthy cloth knitted sweater fabric

Abstract

The invention belongs to the technical field of textile, and particularly relates to a preparation method of cotton / modal, polyester and spandex healthy cloth knitted sweater fabric. The invention discloses a preparation method of cotton / modal, polyester and spandex healthy cloth knitted fleece fabric, which comprises the following steps of: weaving inner layer and surface layer fabrics by using cotton and modal blended yarns, weaving middle layer fabrics by using polyester, distributing spandex yarns as lining spandex yarns on the inner layer, the middle layer, the surface layer and the middle layer, and then finishing to obtain the cotton / modal, polyester and spandex healthy cloth knitted fleece fabric. Wherein the finishing comprises the following procedures of steaming, loose washing, singeing, dry cloth shaping and decating. The cotton / modal, polyester and spandex healthy cloth knitted sweater fabric solves the problems that knitted healthy cloth processed through a conventional technology is soft, collapsed and intangible and is poor in air layering sense, and the prepared cotton / modal, polyester and spandex healthy cloth knitted sweater fabric is elastic, soft, glutinous, high in air layering sense, stiff, smooth and stylish in texture, soft, skin-friendly, easy in naked feeling, natural, resistant to wrinkles, durable and easy to care.

Description

Technical Field

[0001] The present invention belongs to the technical field of textiles, and particularly relates to a preparation method of a knitted sweatshirt fabric made of cotton / modal, polyester, and spandex health cloth. Background Art

[0002] Health cloth belongs to a type of air layer and can be combined with different raw materials to endow the fabric with different functions and tactile sensations. The spandex health cloth has excellent warmth retention performance. Its structure is designed as a composite structure of an inner layer, a middle layer, and an outer layer, and the middle layer remains a hollow structure, which can effectively isolate air to achieve the warmth retention effect and is not easy to cause wrinkles. It is the preferred structure for making sweatshirts, windbreakers, and coats.

[0003] The biggest pain point of this type of fabric is that during the finishing process, due to being squeezed and stretched by the equipment, the fabric is prone to collapse, resulting in the disappearance of the air layer feeling of the fabric and the loss of the Q-elastic feeling. The sewn sweatshirt is soft and shapeless, affecting the wearing experience of consumers.

[0004] Chinese Patent CN110485040A discloses a tencel elastic health cloth, which is characterized in that it is a three-layer structured cloth composed of a surface layer, a middle layer, and an inner layer in sequence; the surface layer is tencel; the middle layer is spandex; the inner layer is polyester. A tencel elastic health cloth as described in claim 8 is characterized in that the design process is as follows: S1. Weaving; S2. Pre-setting; S3. Dyeing / open fiber in an overflow or air-jet machine; S4. Setting. This patent selects spandex as the middle layer. Spandex has poor rigidity, and in the subsequent finishing, conventional pre-setting is used. The fabric is squeezed by the calender, and the resulting finished fabric has a poor air layer feeling and is soft and shapeless.

[0005] Chinese Patent CN114277491A discloses a sweat-absorbing, ultra-soft, light-elastic air layer fabric and its preparation method. The preparation method includes the following steps: (1) Weaving to weave the fabric into a grey cloth; (2) Dyeing and finishing, passing the grey cloth through sizing → dyeing → drying → shearing → setting → inspection in sequence to obtain a sweat-absorbing, ultra-soft, light-elastic air layer fabric. In claim 1, sizing: The grey cloth obtained in step S1 is set at 200-240°C, with an overfeed rate of 10-30%, a vehicle speed of 30-40 m / min, and set for 30-60 s to obtain a pre-set grey cloth. The setting temperature is above 200 degrees. The ultra-high temperature results in poor elastic recovery of the fabric. Although the fabric feels soft, temperatures above 200°C will make the fabric dry inside. Summary of the Invention

[0006] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a preparation method of a knitted sweatshirt fabric made of cotton / modal, polyester, and spandex health cloth, so as to solve the problems of fabric collapse, disappearance of the air layer feeling, and loss of the Q-elastic hand feeling during the finishing process.

[0007] The preparation method of the cotton / modal, polyester, spandex health cloth knitted sweatshirt fabric of the present invention weaves the inner and outer fabrics with a cotton and modal blended yarn, weaves the middle fabric with polyester, and uses spandex yarn as the lining spandex, which is distributed between the inner and middle layers and between the outer and middle layers, and then finishes to obtain the cotton / modal, polyester, spandex health cloth knitted sweatshirt fabric;

[0008] Among them:

[0009] The finishing includes the following processes:

[0010] Steam heating → Relaxed washing → Singeing → Dry cloth setting → Decating.

[0011] The cotton and modal blended yarn: 40 - 60S, polyester: 30 - 75D, F number: 1F, spandex: 20 - 40D, circular knitting machine: 34” 24G - 34” 30G (34” is the cylinder diameter of 34 inches, 24G - 30G is the machine number).

[0012] For the steam heating: the steam injection rate is 160 - 180 kg / h, the vehicle speed is 10 - 15 m / min, the drying temperature of the felt is 70 - 90 °C, and the moisture content of the falling cloth is 20 - 30%.

[0013] For the steam heating: the fabric enters the net belt in a flat width, passes through the felt drying, and falls in a flat width.

[0014] For the relaxed washing: the water washing tank temperature: 30 / 30 / 80 / 80 / 60 °C, the steaming box temperature 80 - 100 °C, the vehicle speed 15 - 20 m / min, and the equipment tension 40 - 60 N.

[0015] For the relaxed washing: the fabric enters the water washing tank in a flat width, enters the rear water washing tank through the stacking box, and falls in a flat width.

[0016] For the dry cloth setting: the temperature: 190 - 195 °C, the vehicle speed 20 - 25 m / min, the upper and lower air volumes in the drying room adopt stepped air volumes, the overfeed is 20% - 40%, and it does not pass through the calender.

[0017] The stepped air volume is: the upper / lower air volumes of the 1st - 2nd drying rooms are both 95% / 90%, the upper / lower air volumes of the 3rd - 4th drying rooms are both 90% / 85%, and the upper / lower air volumes of the 5th - 8th drying rooms are both 85% / 75%.

[0018] For the dry cloth setting: the fabric enters in a flat width, avoids the calender, enters the drying room through the expanding needle plate, and falls in a flat width.

[0019] For the decating: the heating decating roller is 2.0 - 2.5 bar, the steam in the steam tank is 1.2 - 1.5 bar, the conveyor net belt is 15 - 20 m / min, and the pneumatic tension of the felt is 2.0 - 2.5 kg.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. In the raw material combination of the present invention, cotton / modal is selected as the surface layer and the inner layer of the fabric, and the fabric feels softer and more delicate; 1F polyester is selected as the connecting line of the middle layer, which has strong rigidity. As the connecting line of the middle layer, it can better support the inner and outer layers, with stronger airiness and greater resilience.

[0022] 2. Before shaping, the present invention performs steam heating and slack scouring respectively. The fabric fully shrinks in a relaxed state, and the fabric is in a more relaxed state. The air layering of the fabric reaches the strongest, providing the best foundation for the next shaping process (shaping will weaken the three-dimensional sense of the air layer of the fabric).

[0023] 3. The present invention uses dry cloth shaping. The running path does not pass through the calender, avoiding the problems of fabric collapse or weakening of the air layering of the fabric caused by the extrusion of the calender. At the same time, a stepped air volume is adopted, which can keep the fabric running smoothly during the shaping process and avoid the problem of unstable air layering caused by the shaking of the fabric at the rear end of the box.

[0024] 4. Compared with the conventional method of adding softeners to improve the hand feeling, decating makes the fabric undergo high-temperature ironing in a wet state, and the hand feeling of the fabric is more plump, with better softness and gloss.

[0025] 5. The design of the entire process flow of the present invention ensures that the fabric is always in a pressure-free and relaxed state during the processing, and the obtained fabric has strong air layering, is soft, resilient, and has excellent appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the fabric tissue diagram of the embodiment and the comparative example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] The following further illustrates the present invention with reference to the embodiments, but the protection scope of the present invention is not limited thereto.

[0028] All raw materials used in the embodiments are commercially available unless otherwise specified.

[0029] Example 1

[0030] The preparation method of the cotton / modal, polyester, spandex health cloth knitted sweatshirt fabric is as follows: the inner layer and the surface layer fabrics are woven with cotton and modal blended yarns, the middle layer fabric is woven with polyester, and the spandex yarn is used as the lining spandex filament, which is distributed between the inner layer and the middle layer, and between the surface layer and the middle layer, and then finishing is carried out to obtain the cotton / modal, polyester, spandex health cloth knitted sweatshirt fabric; the specific operations are as follows:

[0031] (1) Selection of raw materials

[0032] Cotton / Modal: 40S, blended ratio of 40 wt% cotton and 60 wt% modal, polyester: 30D, 1F, spandex: 20D;

[0033] (2) Weaving

[0034] Knitting circular machine specifications: 34〞24G, fabric structure diagram as Figure 1 shown, 3 / 6 path feeding cotton / modal + spandex to weave the outer layer; 2 / 5 path feeding cotton / modal + spandex to weave the inner layer; 1 / 4 path feeding polyester to weave the middle layer;

[0035] (3) Finishing

[0036] ① Steaming: The fabric enters the net belt in a flat state, passes through the felt dryer, and falls in a flat state. The process conditions of steaming are that the steam injection amount is 160 kg / h, the vehicle speed is 10 m / min, the felt drying temperature is 70 °C, and the moisture content of the falling fabric is 22.9%;

[0037] ② Relaxed washing: The fabric enters the washing box in a flat state, enters the back-end washing box through the stacking box, and falls in a flat state. The process conditions of relaxed washing are that the temperature of the washing box is 30 / 30 / 80 / 80 / 60, the temperature of the steaming box is 80 °C, the vehicle speed is 15 m / min, and the equipment tension is 40 N;

[0038] ③ Dry fabric shaping: The fabric enters the drying room in a flat state, bypasses the calender, and enters the drying room through the expanding needle plate, and falls in a flat state. The process conditions of dry fabric shaping are not passing through the calender, the drying room temperature is 190 °C, the vehicle speed is 20 m / min, and the upper / lower air volume of the drying room uses stepped air volume. The stepped air volume is: the upper / lower air volume of the 1st - 2nd drying rooms is 95% / 90%, the upper / lower air volume of the 3rd - 4th drying rooms is 90% / 85%, and the upper / lower air volume of the 5th - 8th drying rooms is 85% / 75%;

[0039] ④ Decating: The fabric enters the decating area through the rubber blanket felt in a flat state, passes through the cooling net belt, and falls in a flat state. The process conditions of decating are that the heating decating roller is 2.0 bar, the steam in the steam tank is 1.2 bar, the transmission net belt is 15 m / min, and the pneumatic tension of the felt is 2.0 kg.

[0040] Example 2

[0041] The preparation method of the cotton / modal, polyester, spandex health cloth knitted sweatshirt fabric uses cotton and modal blended yarns to weave the inner and outer layer fabrics, polyester to weave the middle layer fabric, and spandex yarn as the lining spandex filaments, which are distributed between the inner layer and the middle layer, and between the outer layer and the middle layer, and then undergoes finishing to obtain the cotton / modal, polyester, spandex health cloth knitted sweatshirt fabric; the specific operations are as follows:

[0042] (1) Raw material selection

[0043] Cotton / Modal: 60S, blended ratio of 40 wt% cotton and 60 wt% modal, polyester: 75D, 1F, spandex: 40D;

[0044] (2) Weaving

[0045] The specification of the circular knitting machine: 34〞30G, the fabric structure diagram is as Figure 1 shown, 3 / 6 route to draw cotton / modal + spandex to weave the outer layer; 2 / 5 route to draw cotton / modal + spandex to weave the inner layer; 1 / 4 route to draw polyester to weave the middle layer;

[0046] (3) Finishing

[0047] ① Steam heating: The fabric enters the net belt flatly, passes through the felt dryer, and falls flat. The process conditions of steam heating are that the steam injection volume is 180 kg / h, the vehicle speed is 15 m / min, the felt drying temperature is 90 °C, and the moisture content of the falling fabric is 26.7%;

[0048] ② Relaxed washing: The fabric enters the washing box flatly, enters the back-end washing box through the stacking box, and falls flat. The process conditions of relaxed washing are that the temperature of the washing box is 30 / 30 / 80 / 80 / 60, the temperature of the steaming box is 100 °C, the vehicle speed is 20 m / min, and the equipment tension is 60 N;

[0049] ③ Dry fabric setting: The fabric enters the drying room flatly, bypasses the calender, and enters the drying room through the expanding needle plate, and falls flat. The process conditions of dry fabric setting are not passing through the calender, the drying room temperature is 195 °C, the vehicle speed is 25 m / min, the upper / lower air volume of the drying room uses a stepped air volume, and the stepped air volume is: the upper / lower air volume of the 1st - 2nd drying rooms is 95% / 90% respectively, the upper / lower air volume of the 3rd - 4th drying rooms is 90% / 85% respectively, and the upper / lower air volume of the 5th - 8th drying rooms is 85% / 75% respectively;

[0050] ④ Decating: The fabric enters the decating area of the rubber blanket and felt flatly, passes through the cooling net belt, and falls flat. The process conditions of decating are that the heating decating roller is 2.5 bar, the steam in the steam tank is 1.5 bar, the conveyor net belt is 20 m / min, and the pneumatic tension of the felt is 2.5 kg.

[0051] Example 3

[0052] The preparation method of the above-mentioned cotton / modal, polyester, spandex health cloth knitted sweatshirt fabric, uses cotton and modal blended yarn to weave the inner and outer layer fabrics, polyester to weave the middle layer fabric, and spandex yarn as the lining spandex, which is distributed between the inner layer and the middle layer, and between the outer layer and the middle layer, and then conducts finishing to obtain the cotton / modal, polyester, spandex health cloth knitted sweatshirt fabric; the specific operations are as follows:

[0053] (1) Raw material selection

[0054] Cotton / Modal: 50S, blended ratio of 40wt% cotton and 60wt% modal, Polyester: 50D, 1F, Spandex: 30D;

[0055] (2) Weaving

[0056] Specification of circular knitting machine: 34〞28G, fabric structure diagram as Figure 1 shown, 3 / 6 path feeding cotton / modal + spandex to weave the outer layer; 2 / 5 path feeding cotton / modal + spandex to weave the inner layer; 1 / 4 path feeding polyester to weave the middle layer;

[0057] (3) Finishing

[0058] ① Steam heating: The fabric enters the net belt flatly, passes through the felt dryer, and falls flat. The process conditions of steam heating are steam injection rate of 170 kg / h, vehicle speed of 12 m / min, felt dryer temperature of 80℃, and moisture content of the falling fabric of 27.9%;

[0059] ② Relaxed washing: The fabric enters the washing box flatly, passes through the stacking box and enters the rear washing box, and falls flat. The process conditions of relaxed washing are washing box temperature of 30 / 30 / 80 / 80 / 60, steaming box temperature of 90℃, vehicle speed of 18 m / min, and equipment tension of 50 N;

[0060] ③ Dry fabric setting: The fabric enters the drying room flatly, bypasses the calender, and enters the drying room through the expanding needle plate, and falls flat. The process conditions of dry fabric setting are not passing through the calender, drying room temperature of 192℃, vehicle speed of 22 m / min, and the upper / lower air volume of the drying room uses stepped air volume, and the stepped air volume is: the upper / lower air volume of the 1st - 2nd drying rooms is 95% / 90% respectively, the upper / lower air volume of the 3rd - 4th drying rooms is 90% / 85% respectively, and the upper / lower air volume of the 5th - 8th drying rooms is 85% / 75% respectively;

[0061] ④ Decating: The fabric enters the decating area of the rubber blanket and felt flatly, passes through the cooling net belt, and falls flat. The process conditions of decating are heating decating roller of 2.2 bar, steam in the steam tank of 1.3 bar, conveyor net belt of 17 m / min, and pneumatic tension of the felt of 2.3 kg.

[0062] Comparative Example 1

[0063] For the described preparation method, pure cotton yarn is used and spandex is lined to weave the surface and inner layer fabrics, and polyester is used to weave the middle layer fabric, and then finishing is carried out to obtain the knitted sweatshirt fabric of cotton, polyester, and spandex health cloth. The same as Example 1, the difference is that the cotton / modal blended yarn in Example 1 is changed to pure cotton yarn, and the specific operation is as follows:

[0064] (1) Raw material selection

[0065] Pure cotton: 40S, Polyester: 30D, 1F, Spandex: 20D;

[0066] (2) Weaving

[0067] The specifications of the circular knitting machine: 34〞24G. The fabric structure diagram is as Figure 1 shown. 3 / 6-way cotton drawing + spandex knitting for the outer layer; 2 / 5-way cotton drawing + spandex knitting for the inner layer; 1 / 4-way polyester drawing for knitting the middle layer;

[0068] (3) Finishing

[0069] ① Steam heating: The fabric enters the net belt flatly, passes through the felt dryer, and is discharged flatly. The process conditions of steam heating are that the steam injection rate is 160 kg / h, the vehicle speed is 10 m / min, the felt drying temperature is 70 °C, and the moisture content of the discharged fabric is 22.9%;

[0070] ② Relaxed washing: The fabric enters the washing box flatly, enters the rear washing box through the stacking box, and is discharged flatly. The process conditions of relaxed washing are that the temperature of the washing box is 30 / 30 / 80 / 80 / 60, the temperature of the steaming box is 80 °C, the vehicle speed is 15 m / min, and the equipment tension is 40 N;

[0071] ③ Dry fabric shaping: The fabric enters the drying room flatly, bypasses the calender, and enters the drying room through the expanding needle plate, and is discharged flatly. The process conditions of dry fabric shaping are that it does not pass through the calender, the drying room temperature is 190 °C, the vehicle speed is 20 m / min, and the upper / lower air volume of the drying room uses stepped air volume. The stepped air volume is: the upper / lower air volume of the 1st - 2nd drying rooms is 95% / 90% respectively, the upper / lower air volume of the 3rd - 4th drying rooms is 90% / 85% respectively, and the upper / lower air volume of the 5th - 8th drying rooms is 85% / 75% respectively;

[0072] ④ Decating: The fabric enters the decating area flatly through the rubber blanket and felt, passes through the cooling net belt, and is discharged flatly. The process conditions of decating are that the heating decating roller is 2.0 bar, the steam in the steam tank is 1.2 bar, the conveying net belt is 15 m / min, and the pneumatic tension of the felt is 2.0 kg.

[0073] Comparative Example 2

[0074] For the preparation method described above, a cotton and modal blended yarn is used and lined with spandex to weave the surface and inner layer fabrics, and polyester is used to weave the middle layer fabric, and then finishing is carried out to obtain a cotton, polyester, spandex health cloth knitted sweatshirt fabric. The same as Example 1, the difference is that the F number of polyester in Example 1 is changed from 1F to 24F. The specific operations are as follows:

[0075] (1) Raw material selection

[0076] Cotton / Modal: 40S, the blending ratio is 40 wt% cotton and 60 wt% modal, polyester: 30D, 24F, spandex: 20D;

[0077] (2) Weaving

[0078] The specifications of the circular knitting machine: 34〞24G. The fabric structure diagram is as Figure 1 shown. The outer layer is knitted with 3 / 6 - way cotton / modal + spandex; the inner layer is knitted with 2 / 5 - way cotton / modal + spandex; the middle layer is knitted with 1 / 4 - way polyester.

[0079] (3) Finishing

[0080] ① Steam treatment: The fabric enters the net belt in a flat - width state, passes through the felt dryer, and then falls in a flat - width state. The process conditions of steam treatment are that the steam injection volume is 160 kg / h, the vehicle speed is 10 m / min, the felt dryer temperature is 70 °C, and the moisture content of the falling fabric is 22.9%;

[0081] ② Relaxed - type washing: The fabric enters the washing box in a flat - width state, passes through the stacking box and then enters the rear - end washing box, and then falls in a flat - width state. The process conditions of relaxed - type washing are that the temperature of the washing box is 30 / 30 / 80 / 80 / 60, the temperature of the steaming box is 80 °C, the vehicle speed is 15 m / min, and the equipment tension is 40 N;

[0082] ③ Dry - cloth shaping: The fabric enters the drying room in a flat - width state, bypasses the calender, and enters the drying room through the expanding needle plate, and then falls in a flat - width state. The process conditions of dry - cloth shaping are that it does not pass through the calender, the drying room temperature is 190 °C, the vehicle speed is 20 m / min, and the upper / lower air volume of the drying room uses a stepped air volume.

[0083] ④ Decatizing: The fabric enters the decatizing area of the rubber blanket and felt in a flat - width state, passes through the cooling net belt, and then falls in a flat - width state. The process conditions of decatizing are that the heating decatizing roller is 2.0 bar, the steam in the steam tank is 1.2 bar, the transmission net belt speed is 15 m / min, and the pneumatic tension of the felt is 2.0 kg.

[0084] Comparative Example 3

[0085] In the described preparation method, a cotton and modal blended yarn is used and spandex is lined to weave the surface and inner - layer fabrics, and polyester is used to weave the middle - layer fabric, and then finishing is carried out to obtain a cotton, polyester, spandex health - cloth knitted sweatshirt fabric. Different from Example 1, the finishing process in Example 1 is changed to: sizing → flat - width washing → conventional stentering process. The specific operations are as follows:

[0086] (1) Raw material selection

[0087] Cotton / modal: 40S, with a blending ratio of 40 wt% cotton and 60 wt% modal, polyester: 30D, 1F, spandex: 20D;

[0088] (2) Weaving

[0089] The specifications of the circular knitting machine: 34〞24G. The fabric structure diagram is as Figure 1As shown in the figure, the outer layer is woven with 3 / 6 cotton / mohair + spandex; the inner layer is woven with 2 / 5 cotton / mohair + spandex; the middle layer is woven with 1 / 4 polyester.

[0090] (3) Finishing

[0091] The technological process is: blank setting → open-width washing → stentering.

[0092] Among them:

[0093] The process conditions for blank setting are that the pressure of the trough rolling mill is 3.5 kg, the drying room temperature is 192 °C, the vehicle speed is 22 m / min, and the upper / lower air volume of the drying room uses a constant air volume of 85% / 85%.

[0094] The process conditions for open-width washing are that the temperature of the washing boxes is 30 / 30 / 80 / 80 / 60 °C, the vehicle speed is 15 m / min, and the equipment tension is 100 N.

[0095] The process conditions for stentering are to dip and roll the silicone softener 575 (Guangdong Jiahe Co., Ltd.) in the trough, the liquid concentration is 30 g / L, two dips and two rolls, the vehicle speed is 25 m / min, the drying room temperature is 130 °C, and the drying room air volume is 65% / 65%.

[0096] For the fabrics obtained in the examples and comparative examples, a touch scoring system was used to evaluate the hand feeling, and the evaluation results are shown in Table 1 below.

[0097] Table 1 Test Results

[0098]

[0099]

[0100] It should be noted that the higher the level in Table 1, the better the softness, smoothness, air layering, and stiffness of the hand feeling.

[0101] Through the hand feeling touch rating: The fabric of the sweatshirt obtained in the example has a Q-bounce and soft hand feeling, extremely strong air layering, a stiff and shapely texture, and a relaxed nude feeling; the fabric obtained in the comparative example has defects in terms of softness, smoothness, air layering, and stiffness, and cannot achieve the effects of this patent.

[0102] The present invention solves the problems of fabric collapse, poor or disappearing air layer feeling during the finishing process, realizes the production of cotton / mohair, polyester, spandex health cloth knitted sweatshirt fabric, and gives consumers a comfortable feeling for wearing in leisure scenarios.

Claims

1. A method for preparing a cotton / modal, polyester, spandex healthy cloth knitted sweater fabric, characterized in that: The inner and outer fabrics are woven with cotton and modal blended yarns, the middle fabric is woven with polyester, and the spandex yarn is used as the lining spandex yarn, which is distributed between the inner and middle layers, and between the surface and middle layers, and then finished to obtain cotton / modal, polyester, and spandex healthy cloth knitted sweater fabrics; in: The finishing process includes the following steps: Steaming → loose water washing → singeing → dry cloth shaping → steaming.

2. The method for preparing the cotton / modal, polyester, spandex healthy cloth knitted sweater fabric according to claim 1, characterized in that: The cotton and modal blended yarn is 40-60S, the polyester is 30-75D, the F number is 1F, the spandex is 20-40D, and the circular knitting machine is 34"24G-34"30G.

3. The method for preparing the cotton / modal, polyester, spandex healthy cloth knitted sweater fabric according to claim 1, characterized in that: The steaming method comprises the following steps: the steam spraying rate is 160-180 kg / h, the vehicle speed is 10-15 m / min, the carpet drying temperature is 70-90° C., and the moisture content of the falling cloth is 20-30%.

4. The method for preparing the cotton / modal, polyester, spandex healthy cloth knitted sweater fabric according to claim 3, characterized in that: The steaming method comprises the following steps: the fabric is fed into the mesh belt in an open width, dried by the felt blanket, and falls off in an open width.

5. The method for preparing the cotton / modal, polyester, spandex healthy cloth knitted sweater fabric according to claim 1, characterized in that: The loose water washing: the water washing box temperature is 30 / 30 / 80 / 80 / 60°C, the steam box temperature is 80-100°C, the vehicle speed is 15-20m / min, and the equipment tension is 40-60N.

6. The method for preparing the cotton / modal, polyester, spandex healthy cloth knitted sweater fabric according to claim 5, characterized in that: The loose-type washing method includes: the fabric enters the washing box in its open width, enters the rear washing box through the stacking box, and falls out in its open width.

7. The method for preparing the cotton / modal, polyester, spandex healthy cloth knitted sweater fabric according to claim 1, characterized in that: The dry cloth shaping process: temperature: 190-195°C, vehicle speed: 20-25m / min, step air volume for upper and lower air volumes in the drying room, overfeeding of 20%-40%, and no rolling mill.

8. The method for preparing the cotton / modal, polyester, spandex healthy cloth knitted sweater fabric according to claim 7, characterized in that: The stepped air volume is: the up / down air volume of the 1st to 2nd drying rooms is 95% / 90%, the up / down air volume of the 3rd to 4th drying rooms is 90% / 85%, and the up / down air volume of the 5th to 8th drying rooms is 85% / 75%.

9. The method for preparing the cotton / modal, polyester, spandex healthy cloth knitted sweater fabric according to claim 7, characterized in that: The dry cloth shaping: the fabric is fed in with a flat width, avoids the padding car, enters the drying room through the expanding needle plate, and falls out with a flat width.

10. The method for preparing the cotton / modal, polyester, spandex healthy cloth knitted sweater fabric according to claim 1, characterized in that: The decatizing process includes heating the decatizing roller at 2.0 to 2.5 bar, steam in the steam tank at 1.2 to 1.5 bar, conveying mesh belt at 15 to 20 m / min, and pneumatic tensioning of the blanket at 2.0 to 2.5 kg.

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