Preparation method of polyester fabric with moisture absorption and sweat releasing functions

Abstract

The invention belongs to the technical field of textile, and relates to a preparation method of a polyester fabric with moisture absorption and sweat releasing functions, which comprises the following steps: reacting waste leather scraps with phosphoric acid to prepare a regenerated collagen modifier; coating slurry is prepared, polyester fabric is soaked in the coating slurry and then subjected to two-stage standing treatment, and the polyester fabric with the moisture absorption and sweat releasing functions is obtained; the coating slurry contains a regenerated collagen modifier, an anionic waterborne polyurethane dispersion, a polyisocyanate curing agent and a cross-linking agent. The method is simple, and the moisture absorption and sweat releasing functions of the polyester fabric are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of textiles and relates to a method for preparing a polyester fabric with moisture absorption and perspiration discharge functions. Background Art

[0002] Polyester has been widely used in the field of textile fabrics, such as tent fabrics, clothing, sofa fabrics, etc. in recent years due to its excellent properties such as good mechanical strength and good elasticity. However, for clothing fabrics, the performance of polyester in terms of moisture absorption and perspiration is not ideal, which to some extent affects the comfort of the wearer. Therefore, it is particularly important to improve the moisture absorption and perspiration performance of polyester fabrics.

[0003] Patent application CN116397356A discloses a moisture-absorbing and breathable yarn, its weaving process and textile products, which contain the following raw materials in parts by weight: 42-82 parts of polyester fiber, 14-34 parts of rayon fiber, 4-14 parts of tencel fiber and 1-9 parts of spandex fiber. The patent application aims to obtain a yarn that not only has excellent moisture absorption and perspiration effect, but also has good hand feel and touch comfort, while maintaining good durability and elasticity by mixing polyester fiber, rayon fiber, tencel fiber and spandex fiber.

[0004] However, the preparation method of the product also has some shortcomings. On the one hand, the process route is relatively complicated and needs to be carried out in multiple steps, which leads to reduced production efficiency and increased costs. On the other hand, the moisture absorption and perspiration removal effect of the product needs to be further improved. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art and provide a method for preparing a polyester fabric with moisture absorption and perspiration wicking function.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A method for preparing a polyester fabric with moisture absorption and perspiration wicking function comprises the following steps:

[0008] S1, reacting waste leather scraps with phosphoric acid to prepare a regenerated collagen modifier;

[0009] S2, preparing a coating slurry, immersing the polyester fabric in the coating slurry, and then standing at 50-70° C. for 8-10 minutes, and then standing at 100-120° C. for 3-5 minutes to obtain a polyester fabric with moisture absorption and perspiration wicking function;

[0010] In terms of weight, the coating slurry contains 20-30 parts of regenerated collagen modifier, 70-80 parts of anionic waterborne polyurethane dispersion (used to improve the strength of the coating), 2-3 parts of polyisocyanate curing agent, 3-6 parts of cross-linking agent, 1-2 parts of thickener, 0.2-0.4 parts of wetting agent, and 3-5 parts of catalyst. The cross-linking agent is carbodiimide and / or aziridine.

[0011] The present invention uses a coating slurry containing collagen fibers to finish polyester fabrics. The collagen fibers are composed of many peptide chains, and the amino acids on these peptide chains carry carboxyl functional groups. These carboxyl groups are hydrophilic and can form hydrogen bonds with water molecules, thereby binding and retaining water molecules. When cross-linking treatment is performed, specific cross-linking agents are introduced into the system, which can chemically react with the carboxyl groups on the peptide chains, causing some carboxyl groups to be "blocked" or "occupied", that is, they can no longer freely bind to water molecules. Since a part of the carboxyl groups are occupied by the cross-linking agent, the moisture transmission path or channel originally formed by these carboxyl groups will be disturbed or changed. These changes will affect the transmission efficiency and path of moisture inside the collagen fibers. The present invention can give polyester fabrics ideal moisture absorption and perspiration function by controlling the amount of cross-linking agent used.

[0012] Collagen fibers are not resistant to high temperatures. When using a coating slurry containing collagen fibers to finish polyester fabrics, how to avoid damage to the collagen fibers during curing is a difficult problem. The present invention solves this problem by designing a temperature gradient. First, the slurry is allowed to stand at 50-70°C for 8-10 minutes. At this time, the hydroxyl groups on the collagen fibers react with the isocyanate of the polyisocyanate curing agent, thereby improving the heat resistance of the collagen fibers. Then, the slurry is allowed to stand at 100-120°C for 3-5 minutes. At this time, the carboxyl groups in the collagen fibers and the carboxyl groups in the anionic waterborne polyurethane dispersion react with the crosslinking agent.

[0013] As the preferred technical solution:

[0014] The method for preparing a polyester fabric with moisture absorption and perspiration function as described above, the specific process of step S1 is: adding waste leather scraps to a phosphoric acid solution (solvent is water) with a pH value of 3-4, stirring and reacting at 60-80°C for 8-10 hours, and obtaining a regenerated collagen modifier with a molecular weight of 2000-3500D through post-treatment, wherein the post-treatment is sequentially cooling, filtering, neutralizing the filtrate with alkali to a pH value of 7-8, transferring the filtrate to a 2000-3500D dialysis bag for dialysis (temperature is 40°C, time is 24 hours), and freeze-drying.

[0015] As described above, in the method for preparing a polyester fabric with moisture absorption and perspiration wicking function, in step S1, the waste leather scraps are waste cowhide leather scraps or waste sheepskin leather scraps that have been sequentially treated with impurity removal, water washing, and drying, the amount of chrome tanning agent added during leather making is 2-6wt% of the cowhide or sheepskin, and the weight ratio of the waste leather scraps to the phosphoric acid solution is 5-10:30-60.

[0016] In the method for preparing a polyester fabric with moisture absorption and perspiration wicking function as described above, in step S2, the anionic aqueous polyurethane dispersion is an aliphatic polyester aqueous polyurethane dispersion containing a carboxyl group or an aliphatic polyether aqueous polyurethane dispersion containing a carboxyl group.

[0017] In the method for preparing the polyester fabric with moisture absorption and perspiration wicking function as described above, in step S2, the polyisocyanate curing agent is isophorone diisocyanate trimer or hexamethylene diisocyanate trimer.

[0018] In the method for preparing a polyester fabric with moisture absorption and perspiration wicking function as described above, in step S2, the viscosity of the coating slurry is 200-500 mPa·s, the polyester fabric is immersed in the coating slurry for 2-4 seconds, and the mass ratio of the polyester fabric to the coating slurry is 6-10:100.

[0019] In the method for preparing the polyester fabric with moisture absorption and perspiration wicking function as described above, the thickener is a polyurethane associative thickener; the wetting agent is an organosilicon wetting agent; and the catalyst is dibutyltin dilaurate, bismuth neodecanoate or bismuth isooctanoate.

[0020] The method for preparing the polyester fabric with moisture absorption and perspiration wicking function as described above, wherein the moisture evaporation rate of the polyester fabric with moisture absorption and perspiration wicking function is 0.38-0.41 g·h -1 , the drip diffusion time is 0s.

[0021] Beneficial effects:

[0022] (1) The method of the present invention is simple, does not require complicated process flow, improves production efficiency and reduces costs.

[0023] (2) The polyester fabric prepared by the present invention has excellent moisture absorption and perspiration removal function.

[0024] (3) The coating slurry of the present invention does not contain an organic solvent. The polyester fabric with moisture absorption and perspiration removal function obtained after immersing the polyester fabric in the coating slurry does not contain volatile organic compounds (VOCs), and is an environmentally friendly product that meets the industry's sustainable development requirements. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0026] The following are the test methods for the relevant performance indicators in each embodiment and comparative example:

[0027] Viscosity: measured using NDJ-8S digital viscometer.

[0028] Water evaporation rate and water drop diffusion time: measured in accordance with GB / T 21655.1-2008 "Evaluation of moisture absorption and quick-drying properties of textiles Part 1: Single combination test method".

[0029] Example 1

[0030] A method for preparing a polyester fabric with moisture absorption and perspiration wicking function, the specific steps are as follows:

[0031] (1) Preparation of raw materials;

[0032] Waste leather scraps: waste leather scraps of cowhide. During the tanning process, the amount of chrome tanning agent (chrome powder, i.e. chromium in powdered state, purchased from Qinghe County Ruijiang Metal Materials Co., Ltd., the same below) added is 2wt% of the cowhide;

[0033] Phosphoric acid aqueous solution: pH value is 3;

[0034] Base: NaOH;

[0035] Anionic waterborne polyurethane dispersion: manufacturer is Guangzhou Ruilin New Materials, brand name is R8402B;

[0036] Polyisocyanate curing agent: hexamethylene diisocyanate trimer, manufactured by Covestro, brand name Desmodur N3300;

[0037] Cross-linking agent: aziridine;

[0038] Polyurethane associative thickener: The manufacturer is Sichuan Shikai New Materials, the brand is ZC-280;

[0039] Silicone wetting agent: manufacturer is Dow Corning, brand name is OFX-5211;

[0040] Catalyst: dibutyltin dilaurate;

[0041] Polyester fabric: weight 120g / m 2 ;

[0042] (2) preparing a regenerated collagen modifier;

[0043] The waste leather scraps that have been treated with impurities removal, water washing and drying are added to a phosphoric acid aqueous solution, stirred and reacted at 60°C for 8 hours, and then cooled, filtered, the filtrate is neutralized with alkali to a pH value of 7, the filtrate is transferred to a dialysis bag for dialysis, and freeze-dried to obtain a regenerated collagen modifier with a molecular weight of 2000D; wherein the weight ratio of the waste leather scraps to the phosphoric acid aqueous solution is 5:30;

[0044] (3) Preparing coating slurry;

[0045] By weight, 20 parts of regenerated collagen modifier, 70 parts of anionic waterborne polyurethane dispersion, 2 parts of polyisocyanate curing agent, 3 parts of crosslinking agent, 1 part of polyurethane associative thickener, 0.2 parts of silicone wetting agent and 3 parts of catalyst were mixed uniformly to obtain a coating slurry with a viscosity of 200 mPa·s;

[0046] (4) Preparation of polyester fabrics with moisture absorption and perspiration wicking function;

[0047] The polyester fabric was immersed in the coating slurry for 2 seconds, then allowed to stand at 50°C for 8 minutes, and then allowed to stand at 100°C for 3 minutes to obtain a polyester fabric with moisture absorption and perspiration removal function; wherein the mass ratio of the polyester fabric to the coating slurry was 6:100.

[0048] The moisture evaporation rate of the resulting polyester fabric with moisture absorption and perspiration wicking function is 0.38 g·h -1 , the drip diffusion time is 0s.

[0049] Example 2

[0050] A method for preparing a polyester fabric with moisture absorption and perspiration wicking function, the specific steps are as follows:

[0051] (1) Preparation of raw materials;

[0052] Waste leather scraps: waste leather scraps of cowhide. The amount of chrome tanning agent (chrome powder) added during tanning is 3wt% of cowhide;

[0053] Phosphoric acid aqueous solution: pH value is 3;

[0054] Base: NaOH;

[0055] Anionic waterborne polyurethane dispersion: the manufacturer is Anhui Feimiao Chemical, the brand is FS-1516;

[0056] Polyisocyanate curing agent: hexamethylene diisocyanate trimer, manufactured by Covestro, brand name Desmodur N3300;

[0057] Cross-linking agent: carbodiimide;

[0058] Polyurethane associative thickener: The manufacturer is Sichuan Shikai New Materials, the brand is ZC-330;

[0059] Silicone wetting agent: manufacturer is Ruike Chemical, brand name is RK-8209;

[0060] Catalyst: Bismuth neodecanoate;

[0061] Polyester fabric: weight 140g / m 2 ;

[0062] (2) preparing a regenerated collagen modifier;

[0063] The waste leather scraps that have been treated with impurities removal, water washing and drying are added to a phosphoric acid aqueous solution, stirred and reacted at 70°C for 9 hours, and then cooled, filtered, the filtrate is neutralized with alkali to a pH value of 8, the filtrate is transferred to a dialysis bag for dialysis, and freeze-dried to obtain a regenerated collagen modifier with a molecular weight of 3000D; wherein the weight ratio of the waste leather scraps to the phosphoric acid aqueous solution is 8:40;

[0064] (3) Preparing coating slurry;

[0065] By weight, 25 parts of regenerated collagen modifier, 75 parts of anionic waterborne polyurethane dispersion, 3 parts of polyisocyanate curing agent, 5 parts of crosslinking agent, 2 parts of polyurethane associative thickener, 0.3 parts of silicone wetting agent and 4 parts of catalyst were mixed uniformly to obtain a coating slurry with a viscosity of 300 mPa·s;

[0066] (4) Preparation of polyester fabrics with moisture absorption and perspiration wicking function;

[0067] The polyester fabric was immersed in the coating slurry for 3 seconds, then allowed to stand at 60°C for 9 minutes, and then allowed to stand at 110°C for 4 minutes to obtain a polyester fabric with moisture absorption and perspiration removal function; wherein the mass ratio of the polyester fabric to the coating slurry was 7:100.

[0068] The moisture evaporation rate of the resulting polyester fabric with moisture absorption and perspiration wicking function is 0.39 g·h -1 , the drip diffusion time is 0s.

[0069] Example 3

[0070] A method for preparing a polyester fabric with moisture absorption and perspiration wicking function, the specific steps are as follows:

[0071] (1) Preparation of raw materials;

[0072] Waste leather scraps: waste leather scraps of cowhide. The amount of chrome tanning agent (chrome powder) added during tanning is 4wt% of cowhide;

[0073] Phosphoric acid aqueous solution: pH value is 4;

[0074] Base: NaOH;

[0075] Anionic waterborne polyurethane dispersion: manufacturer is Anda Huatai, brand name is AH1502F;

[0076] Polyisocyanate curing agent: isophorone diisocyanate trimer, manufactured by Covestro, brand name Desmodur Z4470;

[0077] Cross-linking agent: aziridine;

[0078] Polyurethane associative thickener: The manufacturer is Sichuan Shikai New Materials, the brand is ZC-230;

[0079] Silicone wetting agent: the manufacturer is Japan Momentive, brand number is 1211;

[0080] Catalyst: Bismuth 2-isooctanoate;

[0081] Polyester fabric: weight 160g / m 2 ;

[0082] (2) preparing a regenerated collagen modifier;

[0083] The waste leather scraps that have been treated with impurities removal, water washing and drying are added to a phosphoric acid aqueous solution, stirred and reacted at 80°C for 10 hours, and then cooled, filtered, the filtrate is neutralized with alkali to a pH value of 8, the filtrate is transferred to a dialysis bag for dialysis, and freeze-dried to obtain a regenerated collagen modifier with a molecular weight of 3500D; wherein the weight ratio of the waste leather scraps to the phosphoric acid aqueous solution is 10:60;

[0084] (3) Preparing coating slurry;

[0085] By weight, 30 parts of regenerated collagen modifier, 80 parts of anionic waterborne polyurethane dispersion, 3 parts of polyisocyanate curing agent, 6 parts of crosslinking agent, 2 parts of polyurethane associative thickener, 0.4 parts of silicone wetting agent and 5 parts of catalyst were mixed uniformly to obtain a coating slurry with a viscosity of 500 mPa·s;

[0086] (4) Preparation of polyester fabrics with moisture absorption and perspiration wicking function;

[0087] The polyester fabric was immersed in the coating slurry for 4 seconds, then allowed to stand at 70°C for 10 minutes, and then allowed to stand at 120°C for 5 minutes to obtain a polyester fabric with moisture absorption and perspiration removal function; wherein the mass ratio of the polyester fabric to the coating slurry was 8:100.

[0088] The moisture evaporation rate of the resulting polyester fabric with moisture absorption and perspiration wicking function is 0.4 g·h -1 , the drip diffusion time is 0s.

[0089] Example 4

[0090] A method for preparing a polyester fabric with moisture absorption and perspiration wicking function, the specific steps are as follows:

[0091] (1) Preparation of raw materials;

[0092] Waste leather scraps: Sheepskin waste leather scraps, the amount of chrome tanning agent (chrome powder) added during tanning is 5wt% of the sheepskin;

[0093] Phosphoric acid aqueous solution: pH value is 4;

[0094] Base: NaOH;

[0095] Anionic waterborne polyurethane dispersion: manufacturer is Anda Huatai, brand name is AH1502F;

[0096] Polyisocyanate curing agent: isophorone diisocyanate trimer, manufactured by Covestro, brand name Desmodur Z4470;

[0097] Cross-linking agent: aziridine;

[0098] Polyurethane associative thickener: The manufacturer is Sichuan Shikai New Materials, the brand is ZC-230;

[0099] Silicone wetting agent: the manufacturer is Japan Momentive, brand number is 1211;

[0100] Catalyst: Bismuth 2-isooctanoate;

[0101] Polyester fabric: weight 160g / m 2 ;

[0102] (2) preparing a regenerated collagen modifier;

[0103] The waste leather scraps that have been treated with impurities removal, water washing and drying are added to a phosphoric acid aqueous solution, stirred and reacted at 80°C for 10 hours, and then cooled, filtered, the filtrate is neutralized with alkali to a pH value of 8, the filtrate is transferred to a dialysis bag for dialysis, and freeze-dried to obtain a regenerated collagen modifier with a molecular weight of 3500D; wherein the weight ratio of the waste leather scraps to the phosphoric acid aqueous solution is 7:45;

[0104] (3) Preparing coating slurry;

[0105] By weight, 28 parts of a regenerated collagen modifier, 75 parts of an anionic waterborne polyurethane dispersion, 2 parts of a polyisocyanate curing agent, 4 parts of a crosslinking agent, 1 part of a polyurethane associative thickener, 0.3 parts of an organosilicon wetting agent, and 4 parts of a catalyst were mixed uniformly to obtain a coating slurry having a viscosity of 400 mPa·s;

[0106] (4) Preparation of polyester fabrics with moisture absorption and perspiration wicking function;

[0107] The polyester fabric was immersed in the coating slurry for 3 seconds, then allowed to stand at 60°C for 9 minutes, and then allowed to stand at 110°C for 5 minutes to obtain a polyester fabric with moisture absorption and perspiration removal function; wherein the mass ratio of the polyester fabric to the coating slurry was 9:100.

[0108] The moisture evaporation rate of the resulting polyester fabric with moisture absorption and perspiration wicking function is 0.41 g·h -1 , the drip diffusion time is 0s.

[0109] Comparative Example 1

[0110] A method for preparing a polyester fabric is basically the same as that of Example 4, except that the amount of cross-linking agent added is 2 parts.

[0111] The water evaporation rate of the polyester fabric finally obtained is 0.21g·h -1 .

[0112] Compared with Example 4, the moisture evaporation rate of the polyester fabric in Comparative Example 1 is significantly reduced. This is because the amount of cross-linking agent added in Comparative Example 1 is too low, the coating strength is poor, and the coating is easily destroyed when soaked, making it easier for moisture to accumulate inside the coating, thereby reducing the moisture evaporation rate.

[0113] Comparative Example 2

[0114] A method for preparing a polyester fabric is basically the same as that of Example 4, except that the number of cross-linking agents added is 7 parts.

[0115] The water evaporation rate of the polyester fabric finally obtained is 0.18g·h -1 .

[0116] Compared with Example 4, the moisture evaporation rate of the polyester fabric is significantly reduced in Comparative Example 2. This is because the amount of cross-linking agent added in Comparative Example 2 is too high, resulting in too many carboxyl groups being blocked, making it difficult for moisture to evaporate from the inside of the fabric to the outside, thereby significantly reducing the moisture evaporation rate of the polyester fabric.

[0117] Comparative Example 3

[0118] A method for preparing a polyester fabric is basically the same as that of Example 4, except that in step (4), the polyester fabric is immersed in the coating slurry for 4 seconds and then directly allowed to stand at 120° C. for 10 minutes.

[0119] The water evaporation rate of the polyester fabric finally obtained is 0g·h -1 , the drip diffusion time is 8s.

[0120] Compared with Comparative Example 3 and Example 4, the water evaporation rate of the polyester fabric is significantly reduced, and the drip diffusion time is significantly increased. This is because the collagen fibers do not undergo the isocyanate reaction with the polyisocyanate curing agent at low temperature to improve the heat resistance, but directly enter the high-temperature static stage, resulting in a certain degree of damage to the collagen structure at a relatively high temperature later, which in turn causes the moisture absorption and perspiration performance of the polyester fabric to deteriorate significantly, which is manifested as a decrease in the water evaporation rate and an increase in the drip diffusion time.

[0121] Example 5

[0122] A method for preparing a polyester fabric with moisture absorption and perspiration wicking function, the specific steps are as follows:

[0123] (1) Preparation of raw materials;

[0124] Waste leather scraps: Sheepskin waste leather scraps, the amount of chrome tanning agent (chrome powder) added during tanning is 6wt% of the sheepskin;

[0125] Phosphoric acid aqueous solution: pH value is 4;

[0126] Base: NaOH;

[0127] Anionic waterborne polyurethane dispersion: the manufacturer is Anhui Feimiao Chemical, the brand is FS-1516;

[0128] Polyisocyanate curing agent: hexamethylene diisocyanate trimer, manufactured by Covestro, brand name Desmodur N3300;

[0129] Cross-linking agent: carbodiimide;

[0130] Polyurethane associative thickener: The manufacturer is Sichuan Shikai New Materials, the brand is ZC-230;

[0131] Silicone wetting agent: manufacturer is Dow Corning, brand name is OFX-5211;

[0132] Catalyst: Bismuth neodecanoate;

[0133] Polyester fabric: weight 180g / m 2 ;

[0134] (2) preparing a regenerated collagen modifier;

[0135] The waste leather scraps that have been treated with impurities removal, water washing and drying are added to a phosphoric acid aqueous solution, stirred and reacted at 70°C for 9 hours, and then cooled, filtered, the filtrate is neutralized with alkali to a pH value of 8, the filtrate is transferred to a dialysis bag for dialysis, and freeze-dried to obtain a regenerated collagen modifier with a molecular weight of 3000D; wherein the weight ratio of the waste leather scraps to the phosphoric acid aqueous solution is 8:40;

[0136] (3) Preparing coating slurry;

[0137] By weight, 30 parts of regenerated collagen modifier, 80 parts of anionic waterborne polyurethane dispersion, 3 parts of polyisocyanate curing agent, 3 parts of crosslinking agent, 2 parts of polyurethane associative thickener, 0.4 parts of silicone wetting agent and 5 parts of catalyst were mixed uniformly to obtain a coating slurry with a viscosity of 500 mPa·s;

[0138] (4) Preparation of polyester fabrics with moisture absorption and perspiration wicking function;

[0139] The polyester fabric was immersed in the coating slurry for 4 seconds, then allowed to stand at 70°C for 10 minutes, and then allowed to stand at 120°C for 4 minutes to obtain a polyester fabric with moisture absorption and perspiration removal function; wherein the mass ratio of the polyester fabric to the coating slurry was 10:100.

[0140] The moisture evaporation rate of the resulting polyester fabric with moisture absorption and perspiration wicking function is 0.39 g·h -1 , the drip diffusion time is 0s.

Claims

1. A method for preparing a polyester fabric with moisture absorption and perspiration wicking function, characterized in that: The following steps are involved: S1, reacting waste leather scraps with phosphoric acid to prepare a regenerated collagen modifier; S2, preparing a coating slurry, immersing the polyester fabric in the coating slurry, and then standing at 50-70° C. for 8-10 minutes, and then standing at 100-120° C. for 3-5 minutes to obtain a polyester fabric with moisture absorption and perspiration wicking function; In terms of weight, the coating slurry contains 20-30 parts of regenerated collagen modifier, 70-80 parts of anionic waterborne polyurethane dispersion, 2-3 parts of polyisocyanate curing agent, 3-6 parts of crosslinking agent, 1-2 parts of thickener, 0.2-0.4 parts of wetting agent, and 3-5 parts of catalyst, and the crosslinking agent is carbodiimide and / or aziridine.

2. The method for preparing a polyester fabric with moisture absorption and perspiration wicking function according to claim 1, characterized in that: The specific process of step S1 is: adding waste leather scraps into a phosphoric acid solution with a pH value of 3-4, stirring and reacting at 60-80° C. for 8-10 hours, and obtaining a regenerated collagen modifier with a molecular weight of 2000-3500D through post-treatment.

3. The method for preparing a polyester fabric with moisture absorption and perspiration wicking function according to claim 2, characterized in that: In step S1, the waste leather scraps are waste cowhide leather scraps or sheepskin leather scraps that have been subjected to impurity removal, water washing and drying treatments in sequence. The amount of chrome tanning agent added during leather making is 2-6wt% of the cowhide or sheepskin, and the weight ratio of the waste leather scraps to the phosphoric acid solution is 5-10:30-60.

4. The method for preparing a polyester fabric with moisture absorption and perspiration wicking function according to claim 1, characterized in that: In step S2, the anionic aqueous polyurethane dispersion is an aliphatic polyester aqueous polyurethane dispersion containing a carboxyl group or an aliphatic polyether aqueous polyurethane dispersion containing a carboxyl group.

5. The method for preparing a polyester fabric with moisture absorption and perspiration wicking function according to claim 1, characterized in that: In step S2, the polyisocyanate curing agent is isophorone diisocyanate trimer or hexamethylene diisocyanate trimer.

6. The method for preparing a polyester fabric with moisture absorption and perspiration wicking function according to claim 1, characterized in that: In step S2, the viscosity of the coating slurry is 200-500 mPa·s, the time for the polyester fabric to be immersed in the coating slurry is 2-4 seconds, and the mass ratio of the polyester fabric to the coating slurry is 6-10:

100.

7. The method for preparing a polyester fabric with moisture absorption and perspiration wicking function according to claim 6, characterized in that: The thickener is a polyurethane associative thickener; the wetting agent is an organosilicon wetting agent; and the catalyst is dibutyltin dilaurate, bismuth neodecanoate or bismuth isooctanoate.

8. The method for preparing a polyester fabric with moisture absorption and perspiration wicking function according to claim 1, characterized in that: The moisture evaporation rate of polyester fabric with moisture absorption and perspiration function is 0.38-0.41g·h -1 , the drip diffusion time is 0s.