Preparation process of knitted polyester fabric and knitted polyester fabric

Abstract

The preparation process comprises a weaving process and a dyeing and finishing process, the weaving process comprises the steps that 50D / 72F polyester yarn and 75D / 72F polyester yarn are selected as raw materials and woven into gray cloth through a circular knitting machine, and the dyeing and finishing process comprises the steps that formula auxiliaries and glacial acetic acid are added into the gray cloth for pretreatment, s3, adding caustic soda flakes and a reduction cleaning agent after the dyeing is completed. Adding sodium carbonate, a reduction cleaning agent and sodium hydrosulfite for first reduction cleaning treatment, then adding sodium carbonate, the reduction cleaning agent and sodium hydrosulfite for second reduction cleaning treatment, then adding organic acid and a moisture absorption and sweat releasing finishing agent HPX for acid neutralization, directly taking out of a vat without washing water, scutching and sizing; in a wet cloth state, the fabric is sequentially soaked and rolled by a softening agent and a moisture absorption and sweat releasing finishing agent HPX. The finished fabric has better hygroscopicity, the dyeing and finishing process can solve the problems that the polyester fabric is poor in drying rate performance and stuffy in sweat, and the comfort of clothes is improved.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to a preparation process of a knitted all-polyester fabric and the knitted all-polyester fabric. Background Art

[0002] The concept of "quick-drying" is actually a direct translation of similar words like "QUICK-DRY" or "DRY-EASY." In modern textile and materials science, this characteristic of quick-drying has garnered considerable attention. Numerous studies have shown that the emergence of quick-drying materials has significantly changed people's lifestyles.

[0003] Quick-drying refers to a fabric that, compared to wool or cotton, sheds moisture more easily under the same external conditions, drying faster. This is most commonly seen in clothing worn for activities like yoga, running, and cross-country running.

[0004] Quick-drying clothing dries in just minutes, wicks away perspiration, and is easy to wash. Typically made of synthetic fibers like polyester, these garments aren't as comfortable as natural cotton or linen, but they dry 50% or more faster than regular cotton, making them ideal for today's sports.

[0005] Drying rate, one of the key factors in evaluating quick-drying performance, has long been a challenge and a pain point for knitted quick-drying fabrics. The higher the water absorption rate, the slower the drying rate. Knitted all-polyester fabrics, in particular, experience slow drying rates. When wet with sweat, the garment can become suffocating, significantly increasing discomfort. Summary of the Invention

[0006] The purpose of the present invention is to provide a preparation process of a knitted all-polyester fabric and a knitted all-polyester fabric, which can solve the problems of poor drying rate performance and sweat-sucking of the all-polyester fabric, and improve the drying rate, moisture absorption and perspiration removal and comfort of the clothing.

[0007] To achieve the above object, the present invention provides the following technical solution: a dyeing and finishing process for improving the drying rate of knitted fabrics, the preparation process comprising a weaving process and a dyeing and finishing process, the weaving process comprising selecting 50D / 72F polyester yarn and 75D / 72F polyester yarn as raw materials, knitting a grey cloth through a circular knitting machine, and the dyeing and finishing process comprising the following steps: Step S1, pre-treating the grey cloth, first adding the cloth at room temperature, with a bath ratio of 1:10, and running at room temperature for 5 to 10 minutes after adding the cloth. After the dyed cloth is fully soaked and swollen, adding the formula additives at 40 to 50° C., directly pumping the material, then heating to 95 to 100° C., keeping the temperature for 20 to 30 minutes, and then cooling to 50 to 60° C. and draining the water after the end of the heat preservation. After washing with one tank of cold water, adding glacial acetic acid, heating to 50 to 60° C., keeping the temperature for 20 to 30 minutes, and then cooling to 50 to 60° C. and draining the water after the end of the heat preservation; Step S2, dyeing treatment is performed after pretreatment is completed. First, a dispersing and leveling agent and a moisture-absorbing and perspiration-wicking finishing agent HPX are added at room temperature, and the process is run for 5 to 150 minutes. Then, the dye solution is added, and the process is continued for 20 to 30 minutes. The temperature is raised to 55° C., glacial acetic acid is added, and the process is continued for 20 to 30 minutes. The temperature is raised to 120 to 130° C., and the temperature is kept at this temperature for 30 to 40 minutes. The temperature is then lowered to 50 to 60° C., and the water is drained and washed with cold water for 1 to 2 tanks. Step S3: After dyeing is completed, perform the first reduction cleaning treatment, first add caustic soda and reduction cleaning agent in sequence at room temperature, raise the temperature to 75-90°C; add hydrosulfite, keep warm for 20-30 minutes, cool to 50-60°C after the insulation is completed, and wash with cold water once; Step S4, perform a second reduction cleaning treatment, first add soda ash and reduction cleaning agent in sequence at room temperature, raise the temperature to 75-90°C, add hydrosulfite, keep warm for 20-30 minutes, cool to 50°C after the insulation is completed, and wash with cold water twice; Step S5: Acid neutralization is performed. First, organic acid and moisture absorption and perspiration finishing agent HPX are added at room temperature, and the temperature is raised to 60-80°C and kept warm for 10-30 minutes. After the heat preservation is completed, the temperature is lowered to 50°C, and the product is directly taken out of the vat without washing, opened and shaped; Step S6: When the cloth is wet, the temperature is set at 120-130° C. and the speed is set at 10 m / min-30 m / min, and the softener and the moisture absorption and perspiration finishing agent HPX are dipped and rolled.

[0008] Furthermore, the formulation additives include 1-2 g / L of caustic soda and 1-3 g / L of degreasing agent.

[0009] Furthermore, the heating rate for heating to 95-100°C in step S1 is 1-2°C / min; the heating rate for heating to 50-60°C is 2-3°C / min; the cooling rate in step S1 is 1-2°C / min; the heating rate for heating to 55°C in step S2 is 1-1.5°C / min, the heating rate for heating to 120-130°C is 0.8-1.5°C / min, and the cooling rate is 1-2°C / min; the heating and cooling rates in step S3 and step S4 are both 1-2°C / min, and the heating and cooling rates for heating to 60-80°C in step S5 are 2-3°C / min.

[0010] Furthermore, the concentration of glacial acetic acid in step S1 is 0.5-1 g / L; the concentration of the dispersing leveling agent in step S2 is 0.5-2 g / L, the concentration of the organic acid in step S5 is 1-1.5 g / L, and the concentration of the moisture absorbing and perspiration finishing agent HPX in steps S2 and S5 is 1-4 g / L; the concentration of flake caustic soda and soda ash in steps S3 and S4 is 1-3 g / L, the concentration of hydrosulfite is 2-6 g / L, and the concentration of the reducing cleaning agent is 1-3 g / L; the concentration of the moisture absorbing and perspiration finishing agent HPX in step S6 is 5-20 g / L.

[0011] A moisture-absorbing quick-drying knitted fabric comprises a fabric body. The fabric body is formed by interlacing 50D / 72F polyester yarn and 75D / 72F polyester yarn using rib dense needle open width large circular knitting machine according to a set needle arrangement and diamond angle arrangement.

[0012] Furthermore, the needles of the upper needle disk of the knitting needles are arranged from left to right as level 2 needles, level 1 needles, level 2 needles, and level 1 needles, and the needles of the lower disk needles are arranged from left to right as level 1 needles, level 2 needles, level 1 needles, and level 2 needles.

[0013] Furthermore, the water chestnuts are arranged as follows: Route 1: upper needle disc forming a circle of water chestnuts, upper needle disc forming a circle of water chestnuts, lower needle cylinder floating line water chestnuts, lower needle cylinder forming a circle of water chestnuts; Route 2: upper needle disc forming circle water chestnut, upper needle disc forming circle water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder forming circle water chestnut; Route 3: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder circle water chestnut, lower needle cylinder floating line water chestnut; Route 4: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder circle water chestnut, lower needle cylinder floating line water chestnut; Route 5: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 6: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 7: upper needle disc forming a circle of water chestnuts, upper needle disc forming a circle of water chestnuts, lower needle cylinder forming a circle of water chestnuts, lower needle cylinder floating line water chestnuts; Route 8: upper needle disc forming circle water chestnut, upper needle disc forming circle water chestnut, lower needle cylinder forming circle water chestnut, lower needle cylinder floating line water chestnut; Route 9: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 10: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 11: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder circle water chestnut, lower needle cylinder floating line water chestnut; Route 12: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut.

[0014] Furthermore, the 50D / 72F polyester yarn coil length is 13 to 16 cm / 100 stitches.

[0015] Furthermore, the 75D / 72F polyester yarn coil length is 30 to 33 cm / 100 stitches.

[0016] Furthermore, the finished product weight of the fabric is 145 to 160 g / m2, and the width of the fabric is 165 to 185 cm.

[0017] Beneficial effects of the present invention: The moisture-absorbing and quick-drying knitted fabric of the present invention adopts a knitted jacquard structure interwoven by weft knitting coils, and has better moisture absorption than ordinary fabrics. The jacquard structure weave is not only beautiful, but also comfortable and not tight when worn.

[0018] Compared to the conventional moisture-wicking finishing process for all-polyester fabrics (pre-treatment with a separate degreasing agent, followed by normal dyeing without the addition of the moisture-wicking finishing agent HPX, followed by two normal reduction washes after dyeing, with the moisture-wicking finishing agent HPX also added during neutralization before exiting the fabric from the vat without any water), the dyeing and finishing process of this invention enhances the pre-treatment effect by adding caustic soda flakes, and improves washability by adding the moisture-wicking finishing agent HPX to the dyeing bath. This process does not affect color fastness or color, enhancing the fabric's moisture-wicking and washability. Furthermore, it imparts a soft hand to all-polyester fabrics without requiring additional dyeing and finishing steps, saving energy and cost, ensuring high fabric quality while maintaining excellent color fastness. Furthermore, it effectively alleviates the discomfort of sweating caused by the poor drying rate of all-polyester fabrics after they are wetted by sweat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a graph showing the results of moisture absorption and perspiration test according to the GB / T 21655.1 standard for moisture absorption and quick drying using traditional moisture absorption and perspiration dyeing and finishing processes. Figure 2 This is a graph showing the moisture absorption and perspiration test results according to the moisture absorption and quick drying GB / T 21655.1 standard of the moisture absorption and perspiration dyeing and finishing process of the present invention; Figure 3 This is a color fastness test report for finished products using the traditional moisture-wicking dyeing and finishing process; Figure 4 This is a color fastness test report diagram of a finished product according to the moisture wicking dyeing and finishing process of the present invention; Figure 5This is a front view of the finished product of the present invention; Figure 6 This is a reverse side effect diagram of the finished product of the present invention; Figure 7 The knitting needle arrangement of the present invention; Figure 8 This is the water chestnut arrangement of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] See also Figures 1 to 8 The present invention provides an embodiment: a dyeing and finishing process for improving the drying rate of knitted fabrics, the weaving process and the dyeing and finishing process. In the weaving process, 50D / 72F polyester yarn and 75D / 72F polyester yarn are selected as raw materials and woven into a grey cloth by a circular knitting machine. The dyeing and finishing process includes the following steps: Step S1, pre-treating the grey cloth, first adding the cloth at room temperature, with a bath ratio of 1:10, and running at room temperature for 5-10 minutes after adding the cloth, adding the formula auxiliary agent at 40-50°C after the dyed cloth is fully soaked and swollen, directly pumping the material, then heating to 95-100°C, keeping the temperature for 20-30 minutes, cooling to 50-60°C and draining, washing with one tank of cold water, adding glacial acetic acid, heating to 50-60°C, keeping the temperature for 20-30 minutes, cooling to 50-60°C and draining; pre-treatment before dyeing is indispensable, and the function of the pre-treatment is to change the surface tension of the fabric through a surfactant, improve the hydrophilicity of the fabric, remove excess oil from the fabric, and increase the drying rate of the fabric, and add a moisture-absorbing and perspiration-wicking finishing agent HPX in the dyeing bath, where HPX is a non-ionic ethoxylated carboxylic acid compound, in order to increase the wash-resistant hydrophilicity of the polyester fabric.

[0022] Step S2, dyeing treatment is performed after pretreatment is completed. First, a dispersing and leveling agent and a moisture-absorbing and perspiration-wicking finishing agent HPX are added at room temperature, and the process is run for 5 to 150 minutes. Then, the dye solution is added, and the process is continued for 20 to 30 minutes. The temperature is raised to 55° C., glacial acetic acid is added, and the process is continued for 20 to 30 minutes. The temperature is raised to 120 to 130° C., and the temperature is kept at this temperature for 30 to 40 minutes. The temperature is then lowered to 50 to 60° C., and the water is drained and washed with cold water for 1 to 2 tanks. Step S3: After dyeing is completed, perform the first reduction cleaning treatment, first add caustic soda and reduction cleaning agent in sequence at room temperature, raise the temperature to 75-90°C; add hydrosulfite, keep warm for 20-30 minutes, cool to 50-60°C after the insulation is completed, and wash with cold water once; Step S4, perform a second reduction cleaning treatment, first add soda ash and reduction cleaning agent in sequence at room temperature, raise the temperature to 75-90°C, add hydrosulfite, keep warm for 20-30 minutes, cool to 50°C after the insulation is completed, and wash with cold water twice; Step S5: Acid neutralization. First, add an organic acid and a moisture-wicking finishing agent, HPX, at room temperature. Raise the temperature to 60-80°C and hold for 10-30 minutes. After holding, cool the temperature to 50°C and remove the fabric from the vat without washing. Spreading and shaping are then completed. Acid neutralization and treatment with the moisture-wicking finishing agent, HPX, further improve the fabric's hydrophilicity and enhance its moisture-wicking properties. The same applies to post-custom moisture-wicking finishing. Washing the fabric before removing it from the vat is not recommended. This is because washing in the vat will remove the HPX, reducing its quick-drying properties.

[0023] Step S6: When the cloth is wet, the temperature is set at 120-130° C. and the speed is set at 10-30 m / min, and the softener and the moisture absorption and perspiration finishing agent HPX are dipped and rolled.

[0024] Please continue reading Figures 1 to 8 As shown, in one embodiment of the present invention, the formulation additives include 1-2 g / L of caustic soda and 1-3 g / L of degreasing agent.

[0025] Please continue reading Figures 1 to 8 As shown, in one embodiment of the present invention, the heating rate of heating to 95-100°C in step S1 is 1-2°C / min; the heating rate of heating to 50-60°C is 2-3°C / min; the cooling rate in step S1 is 1-2°C / min; the heating rate of heating to 55°C in step S2 is 1-1.5°C / min, the heating rate of heating to 120-130°C is 0.8-1.5°C / min, and the cooling rate is 1-2°C / min; the heating and cooling rates in step S3 and step S4 are both 1-2°C / min, and the heating and cooling rates in step S5 to 60-80°C are 2-3°C / min.

[0026] Please continue to refer to the figure Figures 1 to 8 As shown, in one embodiment of the present invention, the concentration of glacial acetic acid in step S1 is 0.5-1 g / L; the concentration of the dispersing and leveling agent in step S2 is 0.5-2 g / L, the concentration of the organic acid in step S5 is 1-1.5 g / L, and the concentration of the moisture absorbing and perspiration finishing agent HPX in steps S2 and S5 is 1-4 g / L; the concentration of flake caustic soda and soda ash in steps S3 and S4 is 1-3 g / L, the concentration of hydrosulfite is 2-6 g / L, and the concentration of the reducing cleaning agent is 1-3 g / L; the concentration of the moisture absorbing and perspiration finishing agent HPX in step S6 is 5-20 g / L.

[0027] The embodiment of the present application discloses a dyeing and finishing process for a knitted all-polyester fabric, wherein the fabric composition is 100% polyester. Specific embodiment 1:

[0028] 1. Weaving process: 50D / 72F polyester yarn and 75D / 72F polyester yarn are selected as raw materials and woven into grey cloth through circular knitting machine; 2. Dyeing and finishing process: (1) Pre-dyeing treatment: Add the cloth at room temperature, with a bath ratio of 1:10. After adding the cloth, run it at room temperature for 10 minutes. After the dyed cloth is fully soaked and swollen, add the formula additives at 45°C: caustic soda 2g / L, degreaser 2g / L, and add the materials directly by pumping.

[0029] Heat to 98°C at a rate of 2°C / min, hold for 20 minutes, then cool to 50°C at a rate of 2°C / min and drain. Rinse with one tank of cold water and add 0.5 g / L of glacial acetic acid, heat to 60°C at a rate of 2°C / min, hold for 20 minutes. After the end of the heat preservation, cool to 50°C at a rate of 2°C / min and drain.

[0030] (2) Dyeing: After pre-treatment, dye according to the following dyeing formula, and add moisture-absorbing and perspiration-releasing finishing agent HPX in the same bath to increase wash resistance: First, add 0.5g / L of dispersing and leveling agent and 2g / L of moisture-wicking finishing agent HPX at room temperature. After running for 10 minutes, add dye liquor containing 5% disperse dye and continue adding for 20 minutes. Raise the temperature to 55°C at a rate of 1.5°C / min. Begin adding 1g / L of glacial acetic acid and add glacial acetic acid for 20 minutes. After the addition is complete, raise the temperature again at a rate of 1°C / min to 130°C and hold for 40 minutes. After the holding period, cool the mixture to 50°C at a rate of 2°C / min and drain. Rinse two tanks with cold water.

[0031] (3) First reduction cleaning treatment: After dyeing is completed, reduction cleaning treatment is carried out to remove disperse dyes attached to the surface and strengthen fastness. The process is as follows: At room temperature, add 2g / L of flake caustic soda and 2g / L of reducing cleaning agent in turn, heat to 80℃ at a heating rate of 2℃ / min, add 4g / L of hydrosulfite, keep warm for 20min, then cool to 50℃ at a cooling rate of 2℃ / min, and wash with cold water once.

[0032] Second reduction cleaning treatment: further remove the disperse dyes attached to the surface and strengthen the fastness. The process is as follows: At room temperature, add 4g / L of soda ash and 2g / L of reducing cleaning agent in turn, heat to 80℃ at a heating rate of 2℃ / min, add 4g / L of hydrosulfite, keep warm for 20min, after the insulation is completed, cool to 50℃ at a cooling rate of 2℃ / min, and wash with cold water twice.

[0033] Acid neutralization: After washing, add 1 g / L of organic acid and 2 g / L of moisture-wicking finishing agent HPX at room temperature, heat to 80°C at a rate of 2°C / min, and keep warm for 20 minutes. After the heat preservation is completed, cool to 50°C at a rate of 2°C / min, remove from the vat without washing, open the width, and shape. 2. Finishing: With the fabric wet, set at a temperature of 130°C and a speed of 20 m / min. Apply softener and HPX 10g / L of moisture-wicking finishing agent in a dip-and-roll process.

[0034] In order to further illustrate the effect of the present invention, the present invention has carried out relevant tests, and the test results Figures 1 to 4 ,from Figure 1 The results of the suction and discharge test show that after 5 washes, the drying rate performance has dropped significantly and cannot meet the requirements. Figure 2 The results of the suction and discharge test show that after 5 times of water washing, the evaporation rate has been significantly improved and can meet the test standard requirements; Figure 3 、 Figure 4 The report shows that the color fastness is excellent. Figure 2 and Figure 4 The test results show that the dyeing and finishing process of the present invention has significantly improved drying rates before and after washing compared to the traditional dyeing and finishing process, has better hygroscopicity, and has no effect on color fastness.

[0035] See also Figures 5 to 8 The present invention provides another embodiment: a moisture-absorbing quick-drying knitted fabric with a dyeing and finishing process for improving the drying rate of a knitted all-polyester fabric, comprising a fabric body, wherein the fabric body is formed by interlacing 50D / 72F polyester yarn and 75D / 72F polyester yarn in a pattern of four horizontal coils and 12 longitudinal coils, and is knitted using a ribbed dense needle open width large circular knitting machine according to a predetermined needle arrangement and angle arrangement. The ribbed dense needle open width large circular knitting machine is a ribbed dense needle open width large circular knitting machine with a weft knitting gauge of 28-36 needles x 34 inches; Please continue reading Figure 5 As shown, in another embodiment of the present invention, the needles of the upper needle disk of the knitting needles are arranged from left to right as level 2 needles, level 1 needles, level 2 needles, and level 1 needles, and the needles of the lower disk needles are arranged from left to right as level 1 needles, level 2 needles, level 1 needles, and level 2 needles.

[0036] Please continue reading Figures 5 to 8 As shown, in another embodiment of the present invention, the water chestnuts are arranged as follows: Route 1: upper needle disc forming a circle of water chestnuts, upper needle disc forming a circle of water chestnuts, lower needle cylinder floating line water chestnuts, lower needle cylinder forming a circle of water chestnuts; Route 2: upper needle disc forming circle water chestnut, upper needle disc forming circle water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder forming circle water chestnut; Route 3: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder circle water chestnut, lower needle cylinder floating line water chestnut; Route 4: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder circle water chestnut, lower needle cylinder floating line water chestnut; Route 5: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 6: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 7: upper needle disc forming a circle of water chestnuts, upper needle disc forming a circle of water chestnuts, lower needle cylinder forming a circle of water chestnuts, lower needle cylinder floating line water chestnuts; Route 8: upper needle disc forming circle water chestnut, upper needle disc forming circle water chestnut, lower needle cylinder forming circle water chestnut, lower needle cylinder floating line water chestnut; Route 9: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 10: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 11: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder circle water chestnut, lower needle cylinder floating line water chestnut; Route 12: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut.

[0037] Please continue reading Figures 5 to 8 As shown, in another embodiment of the present invention, the length of the 50D / 72F polyester yarn coil is 13 to 16 cm / 100 stitches.

[0038] Please continue reading Figures 5 to 8 As shown, in another embodiment of the present invention, the length of the 75D / 72F polyester yarn coil is 30 to 33 cm / 100 stitches.

[0039] Please continue reading Figures 5 to 8 As shown, in another embodiment of the present invention, the finished product weight of the fabric is 145-160 g / m2, and the width of the fabric is 165-185 cm.

[0040] The moisture-absorbing and quick-drying knitted fabric is knitted by a ribbed dense-needle open-width large circular knitting machine with a specification of 28-36 weft needles and 34 inches. 4 horizontal coils and 12 longitudinal coils are looped together to form a jacquard structure. 0D / 72F polyester yarns and 75D / 72F polyester yarns are interwoven and knitted into a ribbed jacquard fabric. A moisture-absorbing and quick-drying finishing agent is added in the post-finishing stage, so that the fabric has better moisture absorption performance.

[0041] The above description is only a preferred embodiment of the present invention and should not be understood as limiting the present application. All equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A process for preparing a polyester knitted fabric, characterized in that: The preparation process includes a weaving process and a dyeing and finishing process. The weaving process includes selecting 50D / 72F polyester yarn and 75D / 72F polyester yarn as raw materials and weaving the grey cloth through a circular knitting machine. The dyeing and finishing process includes the following steps: Step S1, pre-treating the grey cloth, first adding the cloth at room temperature, with a bath ratio of 1:10, and running at room temperature for 5 to 10 minutes after adding the cloth. After the dyed cloth is fully soaked and swollen, adding the formula additives at 40 to 50° C., directly pumping the material, then heating to 95 to 100° C., keeping the temperature for 20 to 30 minutes, and then cooling to 50 to 60° C. and draining the water after the end of the heat preservation. After washing with one tank of cold water, adding glacial acetic acid, heating to 50 to 60° C., keeping the temperature for 20 to 30 minutes, and then cooling to 50 to 60° C. and draining the water after the end of the heat preservation; Step S2, dyeing treatment is performed after pretreatment is completed. First, a dispersing and leveling agent and a moisture-absorbing and perspiration-wicking finishing agent HPX are added at room temperature, and the process is run for 5 to 150 minutes. Then, the dye solution is added, and the process is continued for 20 to 30 minutes. The temperature is raised to 55° C., glacial acetic acid is added, and the process is continued for 20 to 30 minutes. The temperature is raised to 120 to 130° C., and the temperature is kept at this temperature for 30 to 40 minutes. The temperature is then lowered to 50 to 60° C., and the water is drained and washed with cold water for 1 to 2 tanks. Step S3: After dyeing is completed, perform the first reduction cleaning treatment, first add caustic soda and reduction cleaning agent in sequence at room temperature, raise the temperature to 75-90°C; add hydrosulfite, keep warm for 20-30 minutes, cool to 50-60°C after the insulation is completed, and wash with cold water once; Step S4, perform a second reduction cleaning treatment, first add soda ash and reduction cleaning agent in sequence at room temperature, raise the temperature to 75-90°C, add hydrosulfite, keep warm for 20-30 minutes, cool to 50-60°C after the insulation is completed, and wash with cold water twice; Step S5: Acid neutralization is performed. First, organic acid and moisture absorption and perspiration finishing agent HPX are added at room temperature, and the temperature is raised to 60-80°C and kept warm for 10-30 minutes. After the heat preservation is completed, the temperature is lowered to 50°C, and the product is directly taken out of the vat without washing, opened and shaped; Step S6: When the cloth is wet, the temperature is set at 120-130° C. and the speed is set at 10-30 m / min, and the softener and the moisture absorption and perspiration finishing agent HPX are dipped and rolled.

2. The process for preparing a polyester knitted fabric according to claim 1, wherein: The formulation auxiliary agent includes 1-2 g / L of flake caustic soda and 1-3 g / L of degreasing agent.

3. The process for preparing a polyester knitted fabric according to claim 1, wherein: The heating rate for heating to 95-100°C in step S1 is 1-2°C / min; the heating rate for heating to 50-60°C is 2-3°C / min; the cooling rate in step S1 is 1-2°C / min; the heating rate for heating to 55°C in step S2 is 1-1.5°C / min, the heating rate for heating to 120-130°C is 0.8-1.5°C / min, and the cooling rate is 1-2°C / min; the heating rates for heating and cooling in step S3 and step S4 are both 1-2°C / min, and the heating and cooling rates for heating to 60-80°C in step S5 are 2-3°C / min.

4. The process for preparing a polyester knitted fabric according to claim 1, wherein: The concentration of glacial acetic acid in step S1 is 0.5-1 g / L; the concentration of the dispersing and leveling agent in step S2 is 0.5-2 g / L, the concentration of the organic acid in step S5 is 1-1.5 g / L, and the concentration of the moisture-absorbing and perspiration-releasing finishing agent HPX in steps S2 and S5 is 1-4 g / L; the concentration of flake caustic soda and soda ash in steps S3 and S4 is 1-3 g / L, the concentration of hydrosulfite is 2-6 g / L, and the concentration of the reducing cleaning agent is 1-3 g / L; the concentration of the moisture-absorbing and perspiration-releasing finishing agent HPX in step S6 is 5-20 g / L.

5. A knitted polyester fabric produced using the process for preparing the polyester knitted fabric according to claim 1, characterized in that: The fabric body comprises a fabric body, which is formed by 4 horizontal coils and 12 longitudinal coils forming a pattern and looped with each other. The fabric body is interwoven with 50D / 72F polyester yarn and 75D / 72F polyester yarn, and is woven using a rib dense needle open width large circular machine according to the set knitting needle arrangement and diamond angle arrangement.

6. The knitted polyester fabric according to claim 5, characterized in that: The needles on the upper needle plate of the knitting needles are arranged from left to right as level 2 needles, level 1 needles, level 2 needles, and level 1 needles, and the needles on the lower needle plate are arranged from left to right as level 1 needles, level 2 needles, level 1 needles, and level 2 needles.

7. The knitted polyester fabric according to claim 5, characterized in that: The water chestnuts are arranged as follows: Route 1: upper needle disc forming a circle of water chestnuts, upper needle disc forming a circle of water chestnuts, lower needle cylinder floating line water chestnuts, lower needle cylinder forming a circle of water chestnuts; Route 2: upper needle disc forming circle water chestnut, upper needle disc forming circle water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder forming circle water chestnut; Route 3: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder circle water chestnut, lower needle cylinder floating line water chestnut; Route 4: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder circle water chestnut, lower needle cylinder floating line water chestnut; Route 5: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 6: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 7: upper needle disc forming a circle of water chestnuts, upper needle disc forming a circle of water chestnuts, lower needle cylinder forming a circle of water chestnuts, lower needle cylinder floating line water chestnuts; Route 8: upper needle disc forming circle water chestnut, upper needle disc forming circle water chestnut, lower needle cylinder forming circle water chestnut, lower needle cylinder floating line water chestnut; Route 9: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 10: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut; Route 11: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder circle water chestnut, lower needle cylinder floating line water chestnut; Route 12: upper needle disc floating line water chestnut, upper needle disc floating line water chestnut, lower needle cylinder floating line water chestnut, lower needle cylinder circle water chestnut.

8. The knitted polyester fabric according to claim 5, characterized in that: The 50D / 72F polyester yarn coil length is 13 to 16 cm / 100 stitches.

9. The knitted polyester fabric according to claim 5, characterized in that: The 75D / 72F polyester yarn coil length is 30 to 33 cm / 100 stitches.

10. The knitted polyester fabric according to claim 5, characterized in that: The finished product weight of the fabric is 145 to 160 grams per square meter, and the width of the fabric is 165 to 185 cm.

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