Dyeing and finishing technology of polyester warp knitted super soft fabric

Abstract

The invention discloses a dyeing and finishing process for polyester warp knitted super-soft fabrics, and the specific steps are as follows: pre-setting, napping, resetting, dyeing, cleaning, heat setting, inspection, and packaging; wherein disperse dyes are used in a co-bath with softeners, dispersants, and carriers during dyeing, and the carrier is obtained by mixing benzyl benzoate, alkyl polyglucoside, sucrose fatty acid ester, and propylene glycol alginate according to a mass ratio of 8-10:3-4:2-3:1-2. The invention shortens the process flow, reduces production energy consumption, greatly improves production efficiency, can be discharged from the cylinder at 60°C, does not produce wrinkles and other problems, and reduces the water and electricity consumption of this part, and has a better application prospect.

Description

Technical Field

[0001] The invention relates to a dyeing and finishing process, in particular to a dyeing and finishing process for polyester warp knitted super-soft fabric, and belongs to the technical field of textile printing and dyeing. Background Art

[0002] The traditional dyeing and finishing process of polyester warp knitted super soft fabric is as follows:

[0003] Sewing head → pre-shaping → pulling → combing, ironing and shearing → returning to setting → mixing vats → dyeing → acid reduction cleaning → water washing → centrifugal dehydration → opening → rope-shaped softening (when using the rope-shaped softening process, the previous process does not need to open the width, but it needs to open the width after rope-shaped softening and before flat-width softening) → flat-width softening → soft drying and shaping → ironing, combing and shearing → shaping → inspection → packaging.

[0004] The traditional dyeing and finishing process has the following problems:

[0005] First, the process is long.

[0006] Second, high energy consumption: Due to the long process flow, it will inevitably lead to an increase in water and electricity consumption. At the same time, after dyeing and post-treatment, the temperature of the polyester warp knitted dyed super soft fabric out of the cylinder is lower than 40°C, otherwise, the dyed warp knitted fabric is prone to wrinkles, so some water and electricity must also be consumed.

[0007] Third, the production efficiency is low: 1) When dyeing, the capacity of the cloth vat is too small; 2) After dyeing and post-processing, the cloth must be washed to below 40°C before it can be taken out of the vat, which will inevitably consume more water and electricity; 3) When softening the fabric, it needs to be rope-shaped and flat-width soft, which will inevitably require labor and water and electricity consumption.

[0008] Fourth, during the dyeing and finishing process, warp knitted super soft fabrics have many defects, such as ice flowers, wrinkles, etc. The repair of these defects will inevitably consume a certain amount of manpower, material and financial resources.

[0009] Fifth, the softness is not ideal. Summary of the invention

[0010] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a dyeing and finishing process for polyester warp knitted super-soft fabrics with good dyeing effect and good softness.

[0011] To achieve the above object, the present invention adopts the following technical solutions:

[0012] The dyeing and finishing process of polyester warp knitted super soft fabric has the following specific steps: pre-setting, napping, resetting, dyeing, cleaning, heat setting, inspection and packaging; wherein disperse dyes are used in the dyeing process to bathe with softeners, dispersants and carriers, and the carrier is obtained by mixing benzyl benzoate, alkyl polyglucoside, sucrose fatty acid ester and propylene glycol alginate in a mass ratio of 8-10:3-4:2-3:1-2.

[0013] Preferably, the softener is a ternary block copolymer hydrophilic silicone softener purchased from Guangzhou YouMeDa Chemical Co., Ltd.; the dispersant is a non-ionic dispersant, and more preferably polyvinyl pyrrolidone.

[0014] Preferably, the specific method for pre-setting is: the polyester warp knitted fabric is pre-set by a setting machine at 220-235° C. and a speed of 23-55 m / min.

[0015] Preferably, the process conditions for roughening are: straight needle speed 60 to 150 rpm, curved needle speed 50 to 130 rpm, and vehicle speed controlled at 25 to 50 m / min.

[0016] Preferably, the warp knitted super-soft fabric after napping is shaped again after ironing, combing and shearing, and the shaping speed is controlled at 35 to 65 m / min.

[0017] Preferably, the specific steps of dyeing are as follows: adding a carrier, a dispersant and a softener to a high-temperature and high-pressure overflow dyeing machine in which the fabric has been prepared with a cylinder and the water inlet meets the dyeing bath ratio, and adjusting the pH to 4.3-4.7 with glacial acetic acid, running for 5-10 minutes, heating to 60°C at 1.0°C / min, keeping warm for 10 minutes, adding a disperse dye pre-dissolved with water at 40°C, running for 10 minutes, and then heating to 130°C at 1.0-1.2°C / min, and keeping warm for 20-60 minutes.

[0018] Further preferably, the component contents during dyeing are as follows: disperse dye 1-5% (owf), leveling agent 1-1.5 g / L, softener 1-3% (owf), dispersant 0.5-1 g / L, carrier 0.2-0.3 g / L.

[0019] Further preferably, the disperse dye is selected from any one or more of disperse orange (CIDisperse Orange 30), disperse red (CIDisperse Red 167) or disperse blue (CIDisperse Blue 79). The disperse dye is a liquid disperse dye, whose ionicity is weakly negative or non-ionic, rather than a powdered disperse dye, whose ionicity is negative or non-ionic, belonging to a relatively strong anion, so that the anionic diffusant in the disperse dye can be effectively avoided from reacting with the weak cationic softener, thereby consuming most of the softener, and finally causing the hand feel of the fabric to decrease in the same-bath dyeing.

[0020] More preferably, the dyeing bath ratio is 1:7-10, the temperature is raised to 130°C at 1.0-1.2°C / min, and kept warm for 20-60 minutes (the lighter the color, the shorter the warming time; the darker the color, the longer the warming time).

[0021] Preferably, the specific method of cleaning is: after dyeing is completed, the temperature is lowered to 80°C, an acidic reducing cleaning agent is added, and the temperature is kept for 20 to 30 minutes, and the overflow water is washed to 60°C, the fabric is taken out of the vat, and it is spun dry.

[0022] More preferably, the dosage of the acidic reducing cleaning agent is 0.5-2 g / L, and the acidic reducing cleaning agent is ZJ-RH25.

[0023] Preferably, the specific method of heat setting is: the cleaned polyester warp knitted fabric is treated with soft water immersion and then sent into a 10-chamber setting machine, wherein the temperature of the first 4 chambers is 155-165°C, the temperature of the middle 4 chambers is 165-180°C, the temperature of the rear 2 chambers is 150-120°C, and the speed is 30-60m / min.

[0024] Beneficial effects of the present invention:

[0025] The invention prepares a polyester warp knitted fabric through pretreatment, dyeing, cleaning, heat setting, inspection and packaging to obtain a polyester warp knitted super-soft fabric. During dyeing, disperse dyes are used to bathe with a softener, a dispersant and a carrier, wherein the carrier is prepared by mixing benzyl benzoate, alkyl polyglucoside, sucrose fatty acid ester and propylene glycol alginate in a specific proportion.

[0026] The present invention effectively prevents the aggregation of disperse dyes by using a dispersant to avoid the generation of defects such as color spots and color spots. The ternary block copolymer hydrophilic silicone softener is used, which has a self-emulsifying property. The non-ionic carrier of a specific composition promotes the adsorption and penetration of the softener to the polyester fiber.

[0027] The invention shortens the process flow, reduces production energy consumption, and greatly improves production efficiency. Disperse dyes are used in a co-bath with softeners, dispersants, and carriers during dyeing, so that the fabric has an ultra-soft feel, and the defects (wrinkles, etc.) existing in the warp knitted ultra-soft fabric are significantly reduced, thereby effectively improving the one-time success rate of processed products and reducing the manpower, water, electricity, and steam consumption required for repair.

[0028] The polyester warp knitted dyed super-soft fabric of the invention can be taken out of the vat at 60° C., and will not produce problems such as wrinkles, thereby reducing the consumption of water and electricity, and having a better application prospect. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with embodiments. It should be noted that the following description is only for explaining the present invention and does not limit its contents.

[0030] Embodiment 1:

[0031] The dyeing and finishing process of polyester warp knitted super soft fabric, the specific steps are as follows:

[0032] Presetting, napping, resetting, dyeing, cleaning, heat setting, inspection and packaging; wherein disperse dyes are used in the dyeing process to bathe with softeners, dispersants and carriers, and the carrier is obtained by mixing benzyl benzoate, alkyl polyglucoside, sucrose fatty acid ester and propylene glycol alginate in a mass ratio of 8:3:2:1.

[0033] Wherein, the softener is a ternary block copolymer hydrophilic silicone softener purchased from Guangzhou Youmei Da Chemical Co., Ltd.; and the dispersant is polyvinyl pyrrolidone.

[0034] The specific method of pre-setting is: the polyester warp knitted fabric is pre-set in a setting machine at 220°C at a speed of 23m / min.

[0035] The process conditions for roughening are: straight needle speed 60 rpm, curved needle speed 50 rpm, and machine speed controlled at 25 m / min.

[0036] The warp-knitted ultra-soft fabric after napping is shaped again after ironing, combing and shearing, and the shaping speed is controlled at 35m / min.

[0037] The specific steps of dyeing are as follows: add carrier, dispersant and softener to a high-temperature and high-pressure overflow dyeing machine with a prepared cylinder and water inlet that meets the dyeing bath ratio, and adjust the pH to 4.3 with glacial acetic acid. After running for 5 minutes, heat it to 60°C at 1.0°C / min, keep it warm for 10 minutes, add disperse dye that has been pre-hydrated at 40°C, run it for 10 minutes, and then heat it to 130°C at 1.0°C / min, and keep it warm for 20 minutes.

[0038] The component contents during dyeing are as follows: disperse dye 1% (owf), leveling agent 1 g / L, softener 1% (owf), dispersant 0.5 g / L, carrier 0.2 g / L.

[0039] The disperse dye is a liquid disperse dye, specifically disperse orange (CI Disperse Orange 30).

[0040] The dyeing bath ratio was 1:7, the temperature was raised to 130°C at 1.0°C / min, and kept warm for 20 minutes.

[0041] The specific method of cleaning is: after dyeing is completed, cool down to 80℃, add acidic reducing cleaning agent, keep warm for 20 minutes, wash with overflow water to 60℃, take the fabric out of the tank and spin dry.

[0042] The dosage of the acidic reducing cleaning agent is 0.5 g / L, and the acidic reducing cleaning agent is ZJ-RH25.

[0043] The specific method of heat setting is: the cleaned polyester warp knitted fabric is treated with soft water immersion and then sent into a 10-chamber setting machine, where the temperature of the first 4 chambers is 155°C, the temperature of the middle 4 chambers is 165°C, the temperature of the last 2 chambers is 150°C, and the speed is 30m / min.

[0044] Embodiment 2:

[0045] The dyeing and finishing process of polyester warp knitted super soft fabric, the specific steps are as follows:

[0046] Presetting, napping, resetting, dyeing, cleaning, heat setting, inspection and packaging; wherein disperse dyes are used in the dyeing process to bathe with softeners, dispersants and carriers, and the carrier is obtained by mixing benzyl benzoate, alkyl polyglucoside, sucrose fatty acid ester and propylene glycol alginate in a mass ratio of 10:4:3:2.

[0047] Wherein, the softener is a ternary block copolymer hydrophilic silicone softener purchased from Guangzhou Youmei Da Chemical Co., Ltd.; and the dispersant is polyvinyl pyrrolidone.

[0048] The specific method of pre-setting is: the polyester warp knitted fabric is pre-set in a setting machine at 235°C at a speed of 55m / min.

[0049] The process conditions for roughening are: straight needle speed 150 rpm, curved needle speed 130 rpm, and machine speed controlled at 50 m / min.

[0050] The warp-knitted ultra-soft fabric after napping is shaped again after ironing, combing and shearing, and the shaping speed is controlled at 65m / min.

[0051] The specific steps of dyeing are as follows: add carrier, dispersant and softener to a high-temperature and high-pressure overflow dyeing machine with a prepared cylinder and water inlet that meets the dyeing bath ratio, and adjust the pH to 4.7 with glacial acetic acid. After running for 10 minutes, heat it to 60°C at 1.0°C / min, keep it warm for 10 minutes, add disperse dye that has been pre-hydrated at 40°C, run it for 10 minutes, and then heat it to 130°C at 1.2°C / min, and keep it warm for 60 minutes.

[0052] The component contents during dyeing are as follows: disperse dye 5% (owf), leveling agent 1.5 g / L, softener 3% (owf), dispersant 1 g / L, and carrier 0.3 g / L.

[0053] The disperse dye is a liquid disperse dye, specifically disperse orange (CI Disperse Orange 30).

[0054] The dyeing bath ratio was 1:10, the temperature was raised to 130°C at 1.2°C / min, and kept warm for 60 minutes.

[0055] The specific method of cleaning is: after dyeing is completed, cool down to 80℃, add acidic reducing cleaning agent, keep warm for 30 minutes, wash with overflow water to 60℃, take the fabric out of the tank and spin dry.

[0056] The dosage of the acidic reducing cleaning agent is 2 g / L, and the acidic reducing cleaning agent is ZJ-RH25.

[0057] The specific method of heat setting is: the cleaned polyester warp knitted fabric is treated with soft water immersion and then sent into a 10-chamber setting machine, where the temperature of the first 4 chambers is 165°C, the temperature of the middle 4 chambers is 180°C, the temperature of the last 2 chambers is 120°C, and the speed is 60m / min.

[0058] Embodiment 3:

[0059] The dyeing and finishing process of polyester warp knitted super soft fabric, the specific steps are as follows:

[0060] Presetting, napping, resetting, dyeing, cleaning, heat setting, inspection and packaging; wherein disperse dyes are used in the dyeing process to bathe with softeners, dispersants and carriers, and the carrier is obtained by mixing benzyl benzoate, alkyl polyglucoside, sucrose fatty acid ester and propylene glycol alginate in a mass ratio of 8:4:2:2.

[0061] Wherein, the softener is a ternary block copolymer hydrophilic silicone softener purchased from Guangzhou Youmei Da Chemical Co., Ltd.; and the dispersant is polyvinyl pyrrolidone.

[0062] The specific method of pre-setting is: the polyester warp knitted fabric is pre-set in a setting machine at 220°C at a speed of 55m / min.

[0063] The process conditions for roughening are: straight needle speed 60 rpm, curved needle speed 130 rpm, and machine speed controlled at 25 m / min.

[0064] The warp-knitted ultra-soft fabric after napping is shaped again after ironing, combing and shearing, and the shaping speed is controlled at 65m / min.

[0065] The specific steps of dyeing are as follows: add carrier, dispersant and softener to a high-temperature and high-pressure overflow dyeing machine with a prepared cylinder and water inlet that meets the dyeing bath ratio, and adjust the pH to 4.3 with glacial acetic acid. After running for 10 minutes, heat it to 60°C at 1.0°C / min, keep it warm for 10 minutes, add disperse dye that has been pre-hydrated at 40°C, run it for 10 minutes, then heat it to 130°C at 1.0°C / min, and keep it warm for 60 minutes.

[0066] The component contents during dyeing are as follows: disperse dye 1% (owf), leveling agent 1.5 g / L, softener 1% (owf), dispersant 1 g / L, and carrier 0.2 g / L.

[0067] The disperse dye is a liquid disperse dye, specifically disperse orange (CI Disperse Orange 30).

[0068] The dyeing bath ratio was 1:10, the temperature was raised to 130°C at 1.0°C / min, and kept warm for 60 minutes.

[0069] The specific method of cleaning is: after dyeing is completed, cool down to 80℃, add acidic reducing cleaning agent, keep warm for 20 minutes, wash with overflow water to 60℃, take the fabric out of the tank and spin dry.

[0070] The dosage of the acidic reducing cleaning agent is 2 g / L, and the acidic reducing cleaning agent is ZJ-RH25.

[0071] The specific method of heat setting is: the cleaned polyester warp knitted fabric is treated with soft water immersion and then sent to a 10-chamber setting machine, where the temperature of the first 4 chambers is 155°C, the temperature of the middle 4 chambers is 180°C, the temperature of the last 2 chambers is 150°C, and the speed is 60m / min.

[0072] Embodiment 4:

[0073] The dyeing and finishing process of polyester warp knitted super soft fabric, the specific steps are as follows:

[0074] Presetting, napping, resetting, dyeing, cleaning, heat setting, inspection and packaging; wherein disperse dyes are used in a bath with a softener, a dispersant and a carrier during dyeing, and the carrier is obtained by mixing benzyl benzoate, alkyl polyglucoside, sucrose fatty acid ester and propylene glycol alginate in a mass ratio of 9:3.5:2.5:1.5.

[0075] Wherein, the softener is a ternary block copolymer hydrophilic silicone softener purchased from Guangzhou Youmei Da Chemical Co., Ltd.; and the dispersant is polyvinyl pyrrolidone.

[0076] The specific method of pre-setting is: the polyester warp knitted fabric is pre-set in a setting machine at 230°C at a speed of 40m / min.

[0077] The process conditions for roughening are: straight needle speed 120 rpm, curved needle speed 120 rpm, and machine speed controlled at 40 m / min.

[0078] The warp-knitted ultra-soft fabric after napping is shaped again after ironing, combing and shearing, and the shaping speed is controlled at 50m / min.

[0079] The specific steps of dyeing are as follows: add carrier, dispersant and softener to a high-temperature and high-pressure overflow dyeing machine with a prepared cylinder and water inlet that meets the dyeing bath ratio, and adjust the pH to 4.5 with glacial acetic acid. After running for 8 minutes, heat it to 60°C at 1.0°C / min, keep it warm for 10 minutes, add disperse dye that has been pre-diluted with water at 40°C, run it for 10 minutes, and then heat it to 130°C at 1.1°C / min, and keep it warm for 45 minutes.

[0080] The component contents during dyeing are as follows: disperse dye 3% (owf), leveling agent 1.2 g / L, softener 2% (owf), dispersant 0.8 g / L, and carrier 0.25 g / L.

[0081] The disperse dye is a liquid disperse dye, specifically disperse orange (CI Disperse Orange 30).

[0082] The dyeing bath ratio was 1:8, the temperature was raised to 130°C at 1.1°C / min and kept at that temperature for 40 minutes.

[0083] The specific method of cleaning is: after dyeing is completed, cool down to 80℃, add acidic reducing cleaning agent, keep warm for 25 minutes, wash with overflow water to 60℃, take the fabric out of the vat and spin dry.

[0084] The dosage of the acidic reducing cleaning agent is 1 g / L, and the acidic reducing cleaning agent is ZJ-RH25.

[0085] The specific method of heat setting is: the cleaned polyester warp knitted fabric is treated with soft water immersion and then sent to a 10-chamber setting machine, where the temperature of the first 4 chambers is 160°C, the temperature of the middle 4 chambers is 170°C, the temperature of the last 2 chambers is 140°C, and the speed is 40m / min.

[0086] Comparative Example 1

[0087] The carrier is obtained by mixing benzyl benzoate, alkyl polyglucoside and sucrose fatty acid ester in a mass ratio of 8:3:2.

[0088] The rest is the same as in Example 1.

[0089] Comparative Example 2

[0090] The carrier is obtained by mixing benzyl benzoate, sucrose fatty acid ester and propylene glycol alginate in a mass ratio of 8:2:1.

[0091] The rest is the same as in Example 1.

[0092] Test example

[0093] The dyeing effect and softness of the fabrics obtained in Examples 1 to 4 and Comparative Examples 1 and 2 were investigated respectively, and the specific methods are as follows:

[0094] 1. Dyeing effect:

[0095] Visually observe whether there are wrinkles on the fabric surface, and refer to GB / T 3920-2008 "Textiles - Tests for colour fastness - Colour fastness to rubbing" for colour fastness test (see Table 1).

[0096] Table 1. Dyeing effect

[0097] Fabric surface condition Wet rubbing color fastness Dry rubbing color fastness Example 1 Colorless spots, no wrinkles 5 4-5 Example 2 Colorless spots, no wrinkles 5 4-5 Example 3 Colorless spots, no wrinkles 5 4-5 Example 4 Colorless spots, no wrinkles 5 5 Comparative Example 1 There are a few spots and slight wrinkles 4-5 4 Comparative Example 2 There are a few spots and slight wrinkles 4 3-4

[0098] 2. Softness:

[0099] The wrinkle recovery angle of the fabric was tested using the Shirley wrinkle recovery performance tester.

[0100] The softness of the fabric is tested according to the AATCC hand feel test standard (AATCC 202-2012). The smaller the softness, the softer it is.

[0101] The test results are shown in Table 2.

[0102] Table 2. Softness

[0103] Wrinkle recovery angle (°) Softness(mN) Example 1 235.12 13.38 Example 2 235.18 13.35 Example 3 236.05 13.21 Example 4 237.22 12.88 Comparative Example 1 220.05 14.57 Comparative Example 2 213.84 15.36

[0104] It can be seen from Table 1 and Table 2 that the fabrics obtained in Examples 1 to 4 have good color fastness, no wrinkles on the surface, and good softness.

[0105] In Comparative Example 1, propylene glycol alginate was omitted from the carrier, and in Comparative Example 2, alkyl polyglucoside was omitted, and the dyeing effect and softness were significantly deteriorated, indicating that the addition of the carrier with specific composition of the present invention and the surface modification of the polyester warp knitted fabric can promote the level dyeing of disperse dyes and promote the uniform distribution of the softener among the fabric fibers, thereby improving the softness of the fabric.

[0106] Although the above describes the specific implementation methods of the present invention, it does not limit the scope of protection of the present invention. Based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. Dyeing and finishing process of polyester warp knitted super soft fabric, characterized in that: The specific steps are as follows: pre-setting, napping, re-setting, dyeing, cleaning, heat setting, inspection and packaging; wherein disperse dyes are used in the dyeing process to bathe with softeners, dispersants and carriers, and the carrier is obtained by mixing benzyl benzoate, alkyl polyglucoside, sucrose fatty acid ester and propylene glycol alginate in a mass ratio of 8-10:3-4:2-3:1-2.

2. The dyeing and finishing process according to claim 1, characterized in that: The specific method of pre-setting is: the polyester warp knitted fabric is pre-set in a setting machine at 220-235°C and the speed is 23-55m / min.

3. The dyeing and finishing process according to claim 1, characterized in that: The process conditions for roughening are: straight needle speed 60-150 rpm, curved needle speed 50-130 rpm, and machine speed controlled at 25-50 m / min.

4. The dyeing and finishing process according to claim 1, characterized in that: The warp knitted super soft fabric after napping is shaped again after ironing, combing and shearing, and the shaping speed is controlled at 35-65m / min.

5. The dyeing and finishing process according to claim 1, characterized in that: The specific steps of dyeing are as follows: add carrier, dispersant and softener to a high-temperature and high-pressure overflow dyeing machine with a prepared cylinder and water that meets the dyeing bath ratio, and use glacial acetic acid to adjust the pH to 4.3-4.

7. After running for 5-10 minutes, heat it to 60°C at 1.0°C / min, keep it warm for 10 minutes, add disperse dye that has been pre-diluted with water at 40°C, run it for 10 minutes, and then heat it to 130°C at 1.0-1.2°C / min, and keep it warm for 20-60 minutes.

6. The dyeing and finishing process according to claim 5, characterized in that: The disperse dye is selected from any one or more of disperse orange, disperse red or disperse blue.

7. The dyeing and finishing process according to claim 5, characterized in that: The dyeing bath ratio is 1:7-10.

8. The dyeing and finishing process according to claim 1, characterized in that: The specific method of cleaning is: after dyeing is completed, cool down to 80℃, add acidic reducing cleaning agent, keep warm for 20 to 30 minutes, wash with overflow water to 60℃, take the fabric out of the vat and spin dry.

9. The dyeing and finishing process according to claim 1, characterized in that: The specific method of heat setting is: the cleaned polyester warp knitted fabric is treated with soft water and then sent into a 10-chamber setting machine, wherein the temperature of the first 4 chambers is 155-165°C, the temperature of the middle 4 chambers is 165-180°C, the temperature of the rear 2 chambers is 150-120°C, and the machine speed is 30-60m / min.