Process for improving fuzzing and pilling of double-sided napping fabric

Abstract

The invention relates to a textile dyeing and finishing process, in particular to a process for improving fuzzing and pilling of a double-sided napped fabric. According to the invention, a fabric pre-shaping pretreatment process is improved and is changed into a preshrinking process; under the condition that the bath ratio is 1: 12, 13-15 kg of sodium carbonate, 3-4 kg of a desizing agent and 3-4 kg of a refining agent are used, heat preservation is conducted for 20 min at the temperature of 105 DEG C, the heating rate is 1.5 DEG C / min, cooling is conducted for 1.5 DEG C / min, water washing is conducted three times after cooling is conducted to 70-75 DEG C, 3-4 kg of glacial acetic acid is used as a neutralizing auxiliary, heat preservation is conducted for 10 min at the temperature of 55-65 DEG C, the fabric width is reduced, the gram weight of the fabric is increased, fiber yarn is made to be fluffy, the yarn holding force is improved, and the thick and fluffy hand feeling of the fabric is enhanced; the purpose of improving fluffing and pilling of the double-sided napped fabric is achieved. By using the improved process, the fuzzing and pilling test result of the fabric is grade 3-4, and the fabric conforms to the clothing standard.

Description

Technical Field

[0001] The invention relates to a textile dyeing and finishing process, in particular to a process for improving the pilling of double-sided napped fabrics. Background Art

[0002] The double-sided napped fabric has fine fluff on the surface, rich texture, soft and comfortable, and soft luster. It not only has good warmth retention, but also brings a cool and non-irritating soft feel when in contact with the skin, which is especially suitable for autumn and winter clothing fabrics. However, the napped fabric needs to be napped on a napping machine and then sheared on a shearing machine. This process will pull out the fibers on the surface of the fabric and cut and grind them into a certain length of fluff. Due to the need for mechanical external cutting, the fibers on the surface of the fabric are easily damaged, and may also break. The fiber fluff that is not washed and removed in the subsequent process and adsorbed on the inside of the fabric will continue to fall off during the subsequent wearing and washing process, and some will be entangled on the surface of the fabric, causing pilling, which seriously affects the skin-friendly feel and appearance of the fabric.

[0003] Fabric pilling is a phenomenon in which the fuzz (called "pilling") generated by the friction of external forces on the surface of the fabric during use and cleaning cannot be removed in time, and further entangled into small balls (called "pilling"). Pilling affects the appearance of the surface of the clothing, and it is also difficult to remove the pilling, which will cause damage to the clothing.

[0004] In the past, double-sided napped fabrics were very likely to cause serious pilling failure after production (test method is GB / T4802.1-2008 780CN, 0 times of napping, 600 times of pilling, 2 or 2-3 levels on both sides), and the original process was: turning over - refining - pre-setting - desizing - neutralization - dyeing - dehydration - opening - setting - napping - shearing - stentering - decatizing. In order to improve the pilling performance of fabrics, it is necessary to improve the fabric process flow. Summary of the invention

[0005] In view of the problems to be solved in the above background technology, the present invention provides a fabric dyeing and finishing process that can improve the pilling performance, which is specifically applicable to the dyeing and finishing process of double-sided napped fabrics. The scheme is as follows: A process for improving the pilling of double-sided napped fabrics, characterized in that the process flow is as follows: turning over the cloth - refining - pre-shrinking - dyeing - dehydration - opening the width - setting - napping - shearing - stentering - decatizing.

[0006] Preferably, the cloth turning uses an unwinding loose cloth turning and feeding car.

[0007] Preferably, the refining uses a flat-width tension 3-box water tank steam drum refining machine, the water tank temperatures are 65°C-95°C-60°C, the drum steam pressure is 3.0Mpa, the additives are: refining agent 4-5kg, desizing agent 3-4kg, soda ash 8-10kg, deoiling agent 3-4kg, and the vehicle speed is 35m / min.

[0008] Preferably, the pre-shrinkage uses a J-type overflow machine with a 500kg cylinder, a bath ratio of 1:12, 13-15kg of auxiliary soda ash, 3-4kg of desizing agent, 3-4kg of refining agent, insulation at 105°C for 20 minutes, a heating rate of 1.5°C / min, a cooling rate of 1.5°C / min, and three water washes at 70-75°C, 3-4kg of neutralizing auxiliary glacial acetic acid, and insulation at 55-65°C for 10 minutes.

[0009] Preferably, the dyeing comprises dyeing with disperse dyes first, keeping the temperature at 130°C for 45 minutes, heating up at a rate of 1.2°C / min, cooling at 1.5°C / min, cooling to 75°C, washing with water and soaping, dyeing with reactive dyes again, keeping the temperature at 60-65°C for 60 minutes, and directly washing with water after the holding time is up. A neutralizing auxiliary agent is used, 2.5-3kg of glacial acetic acid is kept at 60°C for 10 minutes, and then 3-4kg of soaping agent is added, and soaping is performed at 80°C.

[0010] Preferably, the dehydration uses a centrifugal dehydrator with a rotation speed of 940-960 rpm / min for 5 minutes.

[0011] Preferably, the width opening is performed using an automatic untwisting edge opening machine at a speed of 30 m / min.

[0012] Preferably, the finished product is shaped at 200°C, with a speed of 25m / min, a softener of 18-20g / L, an antistatic agent of 5-6g / L, and superweft of 1.5%, 1.5%, and 2.5%.

[0013] Preferably, the napping is performed using a triple rolling pin napping machine, with three passes on each of the front and back sides.

[0014] Preferably, the shearing uses a circular shearing machine with 24 blades, a speed of 30m / min, and shearing is performed three times, one forward and one reverse.

[0015] Preferably, the tentering is performed at a temperature of 130-150° C. and a speed of 30 m / min.

[0016] Preferably, the decatizing uses a water-through blanket decatizing machine with a speed of 30 m / min. Beneficial Effects

[0017] 1. The present invention improves the process steps of fabric pretreatment, desizing and neutralization by preshrinking, improves the fabric weight, makes the fabric thick, fluffy and fine, and is tested according to the pilling test method GB / T4802.1-2008 (780CN, 0 times of pilling, 600 times of pilling). The test results show that both the front and back sides are grade 3-4, and the test is qualified. 2. The fabric is dyed directly after pre-shrinkage. The yarn shrinks and its holding force is enhanced, and its strength is improved. Viscose staple fiber shrinks more than polyester fiber, and the fabric is fluffy. The viscose in the blended yarn covers the surface of polyester. In the pilling experiment, the viscose is pulled out but not easy to pilling, while the polyester is not easy to be pulled out and will not be entangled and pilling. The cloth density is increased, and the pilling performance is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 : A process flow chart of a double-sided napped fabric of the present invention Implementation Example

[0019] The invention discloses a process for improving the pilling of double-sided napped fabrics, and the process flow is as follows: turning over the fabric - refining - pre-shrinking - dyeing - dehydrating - opening the width - setting - napping - shearing - stentering - steaming.

[0020] 1) The fabric specifications of the embodiment are as follows: Ingredients: Polyester 57%, Viscose: 17.3%, Bamboo Fiber: 16.2%, Rabbit Fur: 5.5%, Spandex: 4%; Yarn specifications: Warp: 40s / 2 polyester-viscose wool, Weft: 40s / 2 polyester-viscose + 40D spandex, twist 660 twists, Organization specifications: 1 / 1 plain weave, grey fabric machine specifications: 60x61x82 inches, finished product width 142cm, gram weight 230g / m2.

[0021] 2) The specific process is as follows: Cloth turning: Use the unwinding loose cloth turning machine to feed the cloth.

[0022] Refining: Use a flat-width tension type 3-box water tank steam cylinder refining machine, the water tank temperature is 65℃-95℃-60℃, the cylinder steam pressure is 3.0Mpa, additives: refining agent 5kg, desizing agent 4kg, soda ash 10kg, degreasing agent 4kg, and the vehicle speed is 35m / min.

[0023] Preshrinkage: Use J-type overflow machine 500kg cylinder, bath ratio 1:12, auxiliary soda ash 15kg, desizing agent 4kg, refining agent 4kg, keep warm at 105℃ for 20 minutes, heating rate 1.5℃ / min, cooling 1.5℃ / min, drop to 75℃, wash three times with water, neutralize auxiliary glacial acetic acid 4kg, keep warm at 60℃ for 10min.

[0024] Dyeing: first dye with disperse dyes, keep warm at 120-130℃ for 45min, heat up at 1.2℃ / min, cool down at 1.5℃ / min, cool down to 75℃, wash with water and soap, then dye with reactive dyes, keep warm at 60-65℃ for 60min, wash with water directly after the keeping time is up, use 2.5-3kg of glacial acetic acid as neutralizing auxiliary, keep warm at 60℃ for 10min, then add 3-4kg of soaping agent, wash with soap at 80℃.

[0025] Dehydration: Use a centrifugal dehydrator at a speed of 960 rpm / min for 5 minutes.

[0026] Width opening: Use automatic untwisting edge width opening machine, speed 30m / min.

[0027] Finished product shaping: 200℃, speed 25m / min, softener 20g / L, antistatic agent 6g / L, overweft 1.5%, 1.5%, 2.5%.

[0028] Napping: Use a triple-type rolling pin-type napping machine, and make three passes on each side.

[0029] Shearing: Use a circular shearing machine with 24 blades, a speed of 30m / min, one forward and one reverse, and three shearing cycles.

[0030] Stretching: temperature 150℃, speed 30m / min.

[0031] Steaming: Use water-type blanket steaming machine with a speed of 30m / min.

[0032] A comparative process production experiment was conducted with fabrics having the same fabric composition, warp and weft yarn specifications, and organizational structure as described in the embodiment, wherein the finished product sample produced by the background technology is numbered as sample 1, and the sample produced by embodiment 1 is numbered as sample 2. According to the textile pilling detection standard GB / T4802.1-2008 (780CN, pilling 0 times, pilling 600 times), the finished product samples of embodiment 1 of the present invention and the existing dyeing and finishing process method described in the background technology were respectively subjected to pilling detection tests, and the results are as follows: Table 1 Pilling test results of two different double-sided napped fabrics Test sample Pilling / Grade (front) Pilling / Grade (Back side) Sample 1 2-3 2 Sample 2 3-4 3-4 The experimental data proves that the pilling improvement process of the double-sided napped fabric produced in Example 1 of the present invention has a significant effect, and the pilling test results of the front and back sides are 3-4, which is higher than the 3 level required by the clothing standard, and meets the requirements for pilling performance of clothing textiles. The finished fabric produced by this pre-shrinking process has strong yarn holding force, improved cloth surface density, viscose fiber covering the surface of the fabric, filament polyester is not easy to be pulled out and formed into balls, the fabric feels fluffy and thick, the wool feels fine, and it is not easy to pilling.

[0033] In addition to the pilling performance of the fabrics under the two production process flows, the width and weight of the fabrics in the main steps were also monitored during the control production process. The specific data are as follows: Table 2 Schematic diagram of the changes in width and weight of two different double-sided napped fabrics in each process step According to the above table, when the width is controlled to be constant using the dyeing and finishing process of the present invention, the initial change of the width and gram weight is mainly in the pre-shrinking process. After the pre-shrinking process, the fabric shrinks in both the warp and weft directions, the gram weight increases, and the yarn holding force is enhanced. After the finished product controls the width of the fabric to be constant, the fabric of Example 1 is fluffy, the water absorption rate of the regenerated cellulose fiber is increased, the gram weight is relatively heavy, and it has a thick feeling, and the pilling performance of the fabric is improved.

[0034] It should be noted that the above implementation modes are only preferred schemes made to more clearly illustrate the present invention, and any changes and additions without creativity made by those skilled in the art based on the present invention should fall within the protection scope of the present invention.

Claims

1. A process for improving the pilling of double-sided napped fabrics, the process flow is as follows: turning over - refining - pre-shrinking - dyeing - dehydration - opening - setting - napping - shearing - stentering - decatizing, characterized in that: The pre-shrinkage uses a J-type overflow machine with a 500kg cylinder, a bath ratio of 1:12, 13-15kg of auxiliary soda ash, 3-4kg of desizing agent, 3-4kg of refining agent, 105°C for 20 minutes, a heating rate of 1.5°C / min, a cooling rate of 1.5°C / min, and three water washes at 70-75°C. A neutralization auxiliary glacial acetic acid of 3-4kg is used, and the temperature is kept at 55-65°C for 10 minutes.

2. The process for improving the pilling of double-sided napped fabric according to claim 1, characterized in that: The cloth turning uses an unwinding loose cloth turning and feeding car.

3. The process for improving the pilling of double-sided napped fabric according to claim 1, characterized in that: The refining uses a flat-width tension type 3-box water tank steam drum refining machine, the water tank temperatures are 65°C-95°C-60°C, the drum steam pressure is 3.0Mpa, the additives include: refining agent 4-5kg, desizing agent 3-4kg, soda ash 8-10kg, degreasing agent 3-4kg, and the vehicle speed is 35m / min.

4. The process for improving the pilling of double-sided napped fabric according to claim 1, characterized in that: The dyeing method comprises the following steps: firstly dyeing with disperse dyes, keeping the temperature at 120-130°C for 45 minutes, heating up at a rate of 1.2°C / min, cooling at 1.5°C / min, cooling to 75°C, washing with water and soaping, then dyeing with reactive dyes, keeping the temperature at 60-65°C for 60 minutes, directly washing with water after the heat preservation time is up, using 2.5-3kg of glacial acetic acid as a neutralizing auxiliary agent, keeping the temperature at 60°C for 10 minutes, and then adding 3-4kg of soaping agent, and soaping at 80°C.

5. The process for improving the pilling of double-sided napped fabric according to claim 1, characterized in that: The dehydration was performed using a centrifugal dehydrator with a rotation speed of 940-960 rpm / min for 5 minutes.

6. The process for improving the pilling of double-sided napped fabric according to claim 1, characterized in that: The width opening is performed using an automatic untwisting edge opening machine at a speed of 30 m / min.

7. The process for improving the pilling of double-sided napped fabric according to claim 1, characterized in that: The finished product is set at 190-200°C, a machine speed of 25m / min, a softener of 18-20g / L, an antistatic agent of 5-6g / L, and superweft of 1.5%, 1.5%, and 2.5%.

8. The process for improving the pilling of double-sided napped fabric according to claim 1, characterized in that: The napping is performed using a triple-type rolling pin napping machine, with three passes on each of the front and back sides.

9. The process for improving double-sided napping and pilling according to claim 1, characterized in that: The shearing is performed using a circular shearing machine with 24 blades, a speed of 30 m / min, one forward and one reverse, and three shearing steps.

10. The process for improving the pilling of double-sided napped fabric according to claim 1, characterized in that: The tentering temperature is 130-150° C. and the speed is 30 m / min.

11. The process for improving the pilling of double-sided napped fabric according to claim 1, characterized in that: The decatizing machine uses a water-through blanket decatizing machine with a speed of 30 m / min.

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