A kind of regenerated blended cotton yarn and its production process

Abstract

The present application relates to a regenerated blended cotton yarn, which is treated with a surface treatment agent, and the surface treatment agent components are sodium dodecyl sulfonate, mica powder, p-methoxy salicylaldehyde, 3,4-dimethoxyphenylacetonitrile, sodium ethoxide, silicone oil emulsion, anhydrous ethanol and water; a production process of regenerated blended cotton yarn includes the preparation of a surface treatment agent and the surface treatment of the regenerated blended cotton yarn. The present application has the following advantages and effects: sodium dodecyl sulfonate and mica powder both have a conductive effect, which can cause static electricity to leak in time; p-methoxy salicylaldehyde can be hydrogen bonded to the hydroxyl groups on the cotton fibers of the cotton yarn, and the oxygen atom in the methoxy group of methoxy salicylaldehyde will produce a conjugated effect with the benzene ring; further, p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile react to form a chemical bond, extend the conjugated chain length, and improve conductivity and antistatic properties; silicone oil emulsion has antistatic and water repellency, and maintains the antistatic properties of the regenerated blended cotton yarn after washing.

Description

Technical Field

[0001] The present application relates to the technical field of cotton yarn processing, and in particular to a regenerated blended cotton yarn and a production process thereof. Background Art

[0002] Cotton yarn is made of cotton fiber through spinning technology. It is a textile used in weaving, rope making, thread making, knitting and embroidery. Recycled cotton is usually used in the production of recycled cotton yarn, which is made by recycling waste clothing fabrics through crushing, carding, drawing, spinning and other operations; blended yarn refers to a blend of two or more different types of fibers. In production applications, recycled blended cotton yarn is usually made by blending recycled cotton yarn with chemical fibers of different colors to achieve the purpose of color adjustment; for example, polyester-cotton blended cloth is usually made by mixing 65% polyester with 35% cotton yarn.

[0003] A Chinese patent with publication number CN105803609A discloses a blended regenerated cotton yarn and a preparation method thereof, which is prepared from the following raw materials in parts by weight: waste cotton fabrics, cotton yarn scraps, polyacrylonitrile fiber, phosphate starch, special low-fat pectin, calcium carbonate, nano zinc oxide, liquid paraffin, nano titanium dioxide, carboxymethyl cellulose, glycerol stearate and water, to solve the problem of poor UV resistance of the current blended regenerated cotton yarn.

[0004] With respect to the above-mentioned related technologies, the applicant believes that the current polyester-cotton blended fabrics still have the problem of easily generating static electricity during use, and therefore the antistatic performance still needs to be improved. Summary of the invention

[0005] In order to improve the antistatic performance of regenerated blended yarn, the present application provides a regenerated blended cotton yarn and a production process thereof.

[0006] In the first aspect, the present application provides a regenerated blended cotton yarn adopting the following technical solution:

[0007] A regenerated blended cotton yarn, wherein the regenerated blended cotton yarn is treated with a surface treatment agent, wherein the surface treatment agent comprises the following components in parts by weight:

[0008] 10-15 parts of sodium lauryl sulfate;

[0009] 5-6 parts of mica powder;

[0010] 6-8 parts of p-methoxy salicylaldehyde;

[0011] 8-9 parts of 3,4-dimethoxybenzyl cyanide;

[0012] 3-4 parts of sodium ethoxide;

[0013] 3-4 parts silicone oil emulsion;

[0014] 15-18 parts of anhydrous ethanol;

[0015] 20-30 parts water.

[0016] By adopting the above technical scheme, the anionic surfactant sodium dodecyl sulfate can make the cotton yarn surface affinity with water, and the ionic surfactant also has a conductive effect; the mica powder has good conductivity, which can make static electricity leak in time, and improve the antistatic property of the recycled blended cotton yarn; p-methoxy salicylaldehyde can be combined with the hydroxyl groups on the cotton fibers of the cotton yarn by hydrogen bonds, and at the same time, the oxygen atom in the methoxy group of p-methoxy salicylaldehyde produces a conjugated effect with the benzene ring, and a conjugated π bond is introduced; further, p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile react to form a chemical bond, extend the conjugated chain length, and thus improve the purpose of conductivity and antistatic property; the mica particles are in the form of flakes, have a large specific surface area, are easy to disperse and contact each other in the silicone oil emulsion, and the silicone oil emulsion has both antistatic and certain water repellent properties, thereby improving the antistatic property of the recycled blended cotton yarn after treatment and helping to maintain the durability of the antistatic property after washing.

[0017] Preferably, the surface treatment agent further comprises 5-6 parts of polyethylene glycol and 2-3 parts of polyethylene glycol methacrylate phosphate by weight.

[0018] By adopting the above technical scheme, polyethylene glycol methacrylate phosphate is a hydrophilic polymer, which helps the surface treatment agent to form a conductive continuous film on the surface of the recycled blended cotton yarn to constitute a conductive surface layer and reduce the surface resistivity; at the same time, polyethylene glycol methacrylate phosphate has a high compatibility with polyethylene glycol, which helps the surface treatment agent to be evenly dispersed and attached to the surface of the recycled blended cotton yarn.

[0019] Preferably, the surface treatment agent further comprises 4-5 parts of 2,2-dihydroxymethylpropionic acid and 0.5-0.7 parts of 4-dimethylaminopyridine by weight.

[0020] By adopting the above technical scheme, under the catalysis of 4-dimethylaminopyridine and with 2,2-dihydroxymethylpropionic acid as the medium, a polymer chemical bond with stronger cross-linking property is formed between polyethylene glycol methacrylate phosphate having ester groups and hydroxyl groups, 2,2-dihydroxymethylpropionic acid and polyethylene glycol, so that a cross-linked network coating with strong adhesion can be formed on the surface of the recycled blended cotton yarn after the surface treatment agent is treated, dried and solidified, thereby improving the antistatic property and durability of the treated recycled blended cotton yarn.

[0021] Preferably, in terms of weight ratio, the polyethylene glycol methacrylate phosphate: polyethylene glycol: 2,2-dihydroxymethylpropionic acid = 2:5:5.

[0022] By adopting the above technical solution, the surface treatment agent further includes 1-2 parts of lauryl alcohol polyether by weight.

[0023] Preferably, the lubrication performance of the surface treatment agent is increased in synergy with the silicone oil emulsion, thereby reducing the friction coefficient and reducing the generation of static electricity.

[0024] In a second aspect, the present application provides a production process for regenerated blended cotton yarn, which adopts the following technical solution:

[0025] A production process for regenerated blended cotton yarn comprises the following steps:

[0026] S1. Preparation of surface treatment agent; dissolving p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile in 12-14 parts of anhydrous ethanol, and after all the solids are dissolved, adding 1 mol / L sodium ethoxide dropwise, reflux at 80-85°C for 1-2h, cooling and filtering, and washing with cold ethanol 2-3 times to obtain a conjugated compound;

[0027] Mix sodium dodecyl sulfate, mica powder, conjugated compound, silicone oil emulsion, remaining anhydrous ethanol and water, and stir for 50-60 minutes;

[0028] S2. Surface treatment of regenerated blended cotton yarn; the regenerated blended cotton yarn was double dipped and double rolled with the surface treatment agent prepared in S1, the concentration of the surface treatment agent was 15-20 g / L, pre-dried at 75-80°C for 3-5 min, and dried at 120-130°C for 40-50 s.

[0029] Preferably, S1 further comprises the following steps: blending 5-6 parts of polyethylene glycol, 2-3 parts of polyethylene glycol methacrylate phosphate, 3-5 parts of 2,2-dihydroxymethylpropionic acid and 0.5-0.7 parts of 4-dimethylaminopyridine, stirring and reacting at 100-120° C. for 5-6 hours to obtain an esterification product;

[0030] Blend 10-15 parts of sodium dodecyl sulfate, 5-6 parts of mica powder, conjugated compound, esterification product, 3-4 parts of silicone oil emulsion, remaining anhydrous ethanol, 1-2 parts of lauryl alcohol polyether and 20-30 parts of water, and stir for 50-60 minutes.

[0031] In summary, this application includes the following beneficial technical effects:

[0032] 1. The anionic surfactant sodium dodecyl sulfate can make the cotton yarn surface affinity with water, and the ionic surfactant also has a conductive effect; the mica powder has good conductivity, which can make static electricity leak in time and improve the antistatic performance of the recycled blended cotton yarn; p-methoxy salicylaldehyde can be combined with the hydroxyl groups on the cotton fibers of the cotton yarn by hydrogen bonds, and at the same time, the oxygen atom in the methoxy group of p-methoxy salicylaldehyde produces a conjugated effect with the benzene ring, introducing a conjugated π bond; further, p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile react to form a chemical bond, extend the length of the conjugated chain, and thus improve the conductivity and antistatic properties; the mica particles are flaky and have a large specific surface area, which is easy to disperse and contact each other in the silicone oil emulsion, and the silicone oil emulsion has both antistatic and certain water repellent properties, thereby improving the antistatic properties of the recycled blended cotton yarn after treatment and helping to maintain the durability of the antistatic properties after washing;

[0033] 2. Polyethylene glycol methacrylate phosphate is a hydrophilic polymer, which helps the surface treatment agent to form a conductive continuous film on the surface of the recycled blended cotton yarn to form a conductive surface layer and reduce the surface resistivity; at the same time, polyethylene glycol methacrylate phosphate has a high compatibility with polyethylene glycol, which helps the surface treatment agent to be evenly dispersed and attached to the surface of the recycled blended cotton yarn;

[0034] 3. Under the catalysis of 4-dimethylaminopyridine, 2,2-dihydroxymethylpropionic acid is used as a medium to form a polymer chemical bond with stronger cross-linking property between polyethylene glycol methacrylate phosphate with ester group and hydroxyl group, 2,2-dihydroxymethylpropionic acid and polyethylene glycol, so that a cross-linked network coating with strong adhesion can be formed on the surface of the recycled blended cotton yarn after the surface treatment agent is treated, dried and solidified, thereby improving the antistatic property and durability of the treated recycled blended cotton yarn. DETAILED DESCRIPTION

[0035] The present application is described in further detail below.

[0036] In this application, mica powder is white mica powder provided by Lingshou County Quanda Mineral Products Processing Plant, with a mesh size of 800 and a density of 2.3; silicone oil emulsion is provided by Nanjing Danpei Chemical Co., Ltd., brand Dow, specification / model 62-66%, pH value 7-9.5, boiling point > 65°C; polyethylene glycol methacrylate phosphate (35705-94-3) is provided by Hubei Qifei Pharmaceutical Chemical Co., Ltd.; polyethylene glycol is provided by Guangzhou Haosheng Chemical Co., Ltd., item number PEG-400, viscosity 6.8-8.0 (cst / 100°C), density 1.5 (g / cm 3 ), brand: Petronas; lauryl alcohol polyether was provided by Nantong Hantai Chemical Co., Ltd., specification: MOA-7.

[0037] Unless otherwise specified, the raw materials used in the following embodiments can be obtained from common commercial sources.

[0038] Example

[0039] Example 1

[0040] The present embodiment discloses a regenerated blended cotton yarn and a production process thereof; a regenerated blended cotton yarn, wherein the regenerated blended cotton yarn is treated with a surface treatment agent, and the surface treatment agent includes the following components: sodium dodecyl sulfate, mica powder, p-methoxy salicylaldehyde, 3,4-dimethoxyphenylacetonitrile, sodium ethoxide, silicone oil emulsion, anhydrous ethanol and water; the content of each component is shown in Table 1 below.

[0041] A production process for regenerated blended cotton yarn comprises the following steps:

[0042] S1. Preparation of surface treatment agent; dissolving p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile in 12 parts of anhydrous ethanol, adding 1 mol / L sodium ethoxide dropwise after all the solids are dissolved, reflux at 80°C for 1 hour, cooling and filtering, and washing with cold ethanol twice to obtain a conjugated compound;

[0043] Sodium dodecyl sulfate, mica powder, conjugated compound, silicone oil emulsion, remaining anhydrous ethanol and water were mixed and stirred for 50 minutes;

[0044] S2. Surface treatment of regenerated blended cotton yarn; the regenerated blended cotton yarn was double dipped and double rolled with the surface treatment agent prepared in S1, the concentration of the surface treatment agent was 15 g / L, pre-baked at 75°C for 3 min, and dried at 120°C for 40 s.

[0045] Example 2

[0046] The present embodiment discloses a regenerated blended cotton yarn and a production process thereof; a regenerated blended cotton yarn, wherein the regenerated blended cotton yarn is treated with a surface treatment agent, and the surface treatment agent includes the following components: sodium dodecyl sulfate, mica powder, p-methoxy salicylaldehyde, 3,4-dimethoxyphenylacetonitrile, sodium ethoxide, silicone oil emulsion, anhydrous ethanol and water; the content of each component is shown in Table 1 below.

[0047] A production process for regenerated blended cotton yarn comprises the following steps:

[0048] S1. Preparation of surface treatment agent; dissolving p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile in 14 parts of anhydrous ethanol, adding 1 mol / L sodium ethoxide dropwise after all the solids are dissolved, reflux at 85°C for 2h, cooling and filtering, and washing with cold ethanol 3 times to obtain a conjugated compound;

[0049] Sodium dodecyl sulfate, mica powder, conjugated compound, silicone oil emulsion, remaining anhydrous ethanol and water were mixed and stirred for 60 minutes;

[0050] S2. Surface treatment of regenerated blended cotton yarn; the regenerated blended cotton yarn was double dipped and double rolled with the surface treatment agent prepared in S1, the concentration of the surface treatment agent was 20 g / L, pre-baked at 80°C for 5 min, and dried at 130°C for 50 s.

[0051] Example 3

[0052] The present embodiment discloses a regenerated blended cotton yarn and a production process thereof; a regenerated blended cotton yarn, wherein the regenerated blended cotton yarn is treated with a surface treatment agent, and the surface treatment agent includes the following components: sodium dodecyl sulfate, mica powder, p-methoxy salicylaldehyde, 3,4-dimethoxyphenylacetonitrile, sodium ethoxide, silicone oil emulsion, anhydrous ethanol and water; the content of each component is shown in Table 1 below.

[0053] A production process for regenerated blended cotton yarn comprises the following steps:

[0054] S1. Preparation of surface treatment agent; p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile were dissolved in 13 parts of anhydrous ethanol, and after all the solids were dissolved, 1 mol / L sodium ethoxide was added dropwise, and the mixture was refluxed at 83°C for 1.5 h, cooled and filtered, and rinsed with cold ethanol 3 times to obtain a conjugated compound;

[0055] Sodium dodecyl sulfate, mica powder, conjugated compound, silicone oil emulsion, remaining anhydrous ethanol and water were mixed and stirred for 55 minutes;

[0056] S2. Surface treatment of regenerated blended cotton yarn; the regenerated blended cotton yarn was double dipped and double rolled with the surface treatment agent prepared in S1, the concentration of the surface treatment agent was 18 g / L, pre-baked at 78°C for 4 min, and dried at 125°C for 45 s.

[0057] Example 4

[0058] The present embodiment discloses a regenerated blended cotton yarn and a production process thereof; a regenerated blended cotton yarn, wherein the regenerated blended cotton yarn is treated with a surface treatment agent, and the surface treatment agent comprises the following components: sodium dodecyl sulfate, mica powder, p-methoxy salicylaldehyde, 3,4-dimethoxyphenylacetonitrile, sodium ethoxide, silicone oil emulsion, anhydrous ethanol, water, polyethylene glycol, polyethylene glycol methacrylate phosphate, 2,2-dihydroxymethylpropionic acid, 4-dimethylaminopyridine and lauryl alcohol polyether; the content of each component is shown in Table 1 below.

[0059] A production process for regenerated blended cotton yarn, which differs from Example 1 in that S1 comprises the following steps:

[0060] S1. Preparation of surface treatment agent; dissolving p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile in 12 parts of anhydrous ethanol, adding 1 mol / L sodium ethoxide dropwise after all the solids are dissolved, reflux at 80°C for 1 hour, cooling and filtering, and washing with cold ethanol twice to obtain a conjugated compound;

[0061] Polyethylene glycol, polyethylene glycol methacrylate phosphate, 2,2-dihydroxymethylpropionic acid, and 4-dimethylaminopyridine were mixed and stirred at 100° C. for 5 h to obtain an esterification product;

[0062] Sodium dodecyl sulfate, mica powder, conjugated compound, esterification product, silicone oil emulsion, remaining anhydrous ethanol, lauryl alcohol polyether and water were mixed and stirred for 50 minutes.

[0063] Example 5

[0064] The present embodiment discloses a regenerated blended cotton yarn and a production process thereof; a regenerated blended cotton yarn, wherein the regenerated blended cotton yarn is treated with a surface treatment agent, and the surface treatment agent comprises the following components: sodium dodecyl sulfate, mica powder, p-methoxy salicylaldehyde, 3,4-dimethoxyphenylacetonitrile, sodium ethoxide, silicone oil emulsion, anhydrous ethanol, water, polyethylene glycol, polyethylene glycol methacrylate phosphate, 2,2-dihydroxymethylpropionic acid, 4-dimethylaminopyridine and lauryl alcohol polyether; the content of each component is shown in Table 1 below.

[0065] A production process for regenerated blended cotton yarn, which differs from Example 2 in that S1 comprises the following steps:

[0066] S1. Preparation of surface treatment agent; dissolving p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile in 14 parts of anhydrous ethanol, adding 1 mol / L sodium ethoxide dropwise after all the solids are dissolved, reflux at 85°C for 2h, cooling and filtering, and washing with cold ethanol 3 times to obtain a conjugated compound;

[0067] Polyethylene glycol, polyethylene glycol methacrylate phosphate, 2,2-dihydroxymethylpropionic acid and 4-dimethylaminopyridine were mixed and stirred at 120° C. for 6 h to obtain an esterification product;

[0068] Sodium dodecyl sulfate, mica powder, conjugated compound, esterification product, silicone oil emulsion, remaining anhydrous ethanol, lauryl alcohol polyether and water were mixed and stirred for 60 minutes.

[0069] Example 6

[0070] The present embodiment discloses a regenerated blended cotton yarn and a production process thereof; a regenerated blended cotton yarn, wherein the regenerated blended cotton yarn is treated with a surface treatment agent, and the surface treatment agent comprises the following components: sodium dodecyl sulfate, mica powder, p-methoxy salicylaldehyde, 3,4-dimethoxyphenylacetonitrile, sodium ethoxide, silicone oil emulsion, anhydrous ethanol, water, polyethylene glycol, polyethylene glycol methacrylate phosphate, 2,2-dihydroxymethylpropionic acid, 4-dimethylaminopyridine and lauryl alcohol polyether; the content of each component is shown in Table 1 below.

[0071] A production process for regenerated blended cotton yarn, which is different from Example 3 in that S1 comprises the following steps:

[0072] S1. Preparation of surface treatment agent; p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile were dissolved in 13 parts of anhydrous ethanol, and after all the solids were dissolved, 1 mol / L sodium ethoxide was added dropwise, and the mixture was refluxed at 83°C for 1.5 h, cooled and filtered, and rinsed with cold ethanol 3 times to obtain a conjugated compound;

[0073] Polyethylene glycol, polyethylene glycol methacrylate phosphate, 2,2-dihydroxymethylpropionic acid and 4-dimethylaminopyridine were mixed and stirred at 110° C. for 5.5 h to obtain an esterification product;

[0074] Sodium dodecyl sulfate, mica powder, conjugated compound, esterification product, silicone oil emulsion, remaining anhydrous ethanol, lauryl alcohol polyether and water were mixed and stirred for 55 minutes.

[0075] Example 7

[0076] The difference from Example 1 is that the components of the surface treatment agent also include polyethylene glycol and polyethylene glycol methacrylate phosphate, and the content of each component is shown in Table 2 below.

[0077] Example 8

[0078] The difference from Example 7 is that polyethylene glycol methacrylate phosphate is replaced by ethyl acetate. The contents of each component are shown in Table 2 below.

[0079] Example 9

[0080] The difference from Example 7 is that polyethylene glycol is replaced by isopropanol. The contents of each component are shown in Table 2 below.

[0081] Example 10

[0082] The difference from Example 4 is that 2,2-dihydroxymethylpropionic acid is replaced by oxalic acid. The contents of each component are shown in Table 2 below.

[0083] Embodiment 11

[0084] The difference from Example 10 is that polyethylene glycol methacrylate phosphate is replaced by ethyl acetate. The contents of each component are shown in Table 2 below.

[0085] Example 12

[0086] The difference from Example 10 is that polyethylene glycol is replaced by isopropanol. The contents of each component are shown in Table 2 below.

[0087] Embodiment 13

[0088] The difference from Example 4 is that, in terms of weight ratio, polyethylene glycol methacrylate phosphate: polyethylene glycol: 2,2-dihydroxymethylpropionic acid = 2:5:5, and the content of each component is shown in Table 2 below.

[0089] Embodiment 14

[0090] The difference from Example 1 is that the surface treatment agent also includes lauryl alcohol polyether, and the content of each component is shown in Table 2 below.

[0091] Comparative Example

[0092] Comparative Example 1

[0093] The difference from Example 1 is that the regenerated blended cotton yarn is not finished with a surface treatment agent.

[0094] Comparative Example 2

[0095] The difference from Example 1 is that p-methoxysalicylaldehyde is replaced by 2,2-dimethyl-3-hydroxypropanal.

[0096] Comparative Example 3

[0097] The difference from Example 1 is that 3,4-dimethoxybenzyl cyanide is replaced by cyclopentanenitrile.

[0098] Comparative Example 4

[0099] The difference from Example 1 is that the silicone oil emulsion is replaced by ether.

[0100] Table 1 Component contents of Examples 1-6

[0101]

[0102]

[0103] Table 2 Component contents of Examples 7-14

[0104]

[0105] Performance testing

[0106] (1) Antistatic performance: Recycled blended cotton yarn was made into a sample strip with a size of 45 mm × 50 mm. The sample strip was rolled onto a rigid polyvinyl chloride tube with an outer diameter of 20 mm and a length of 400 mm. The sample strip was rolled onto the rod for 5 turns with the long side of the sample strip as the winding direction. The two ends of the sample strip were then tightened and inserted into the tube holes to fix it on the rod to make a friction rod. Acrylic knitted fabric with a size of 40 cm × 45 cm was wrapped onto a rigid polyvinyl chloride tube with a size of 32 × 30 × 0.3 cm. 3 The metal plate is placed on the ground, and the four corners are taped with thick tape, and the metal plate is grounded to make a pad.

[0107] Use manual friction method: hold both ends of the friction rod wrapped with the sample strip with both hands, press part of the body weight evenly on the rod, pull the rod from front to back on the pad to rub the sample strip. During the friction of the sample strip, the friction rod must not rotate; the friction speed is 1 time / second. After rubbing 5 times, immediately hold one end of the insulating rod and peel the sample strip off the pad in parallel. The peeling speed is about 1s.

[0108] The sample strip after manual friction was put into the Faraday cup and the charge density of the sample strip (μc / m 2 ); tested at humidity (35±5)%, temperature (20±2)℃.

[0109] The sample strips were washed with neutral laundry detergent at 40°C and 2g / L concentration for 5 minutes, and then dehydrated with a bath ratio of 1:30; then washed with clean water at room temperature for 2 minutes, and then dehydrated; the above operation was repeated 30 times, and after the sample strips were naturally dried, the charge density was tested again.

[0110] The smaller the charge density, the better the antistatic property. The test results are shown in Table 3 below.

[0111] Table 3 Performance test results of various embodiments and comparative examples

[0112]

[0113]

[0114] This specific implementation is merely an explanation of the present application and is not intended to limit the scope of protection of the present application. After reading this specification, those skilled in the art may make modifications to the present implementation as needed without any creative contribution, but as long as it is within the scope of the claims of the present application, it shall be protected by the patent law.

Claims

1. A recycled blended cotton yarn, Features: The regenerated blended cotton yarn is treated with a surface treatment agent, and the surface treatment agent includes the following components in parts by weight: 10-15 parts of sodium dodecyl sulfate; 5-6 parts of mica powder; 6-8 parts of p-methoxy salicylaldehyde; 8-9 parts of 3,4-dimethoxybenzyl cyanide; 3-4 parts of sodium ethoxide; 3-4 parts silicone oil emulsion; 15-18 parts of anhydrous ethanol; 20-30 parts water; 5-6 parts of polyethylene glycol; 2-3 parts of polyethylene glycol methacrylate phosphate; 3-5 parts of 2,2-dimethylolpropionic acid; 0.5-0.7 parts of 4-dimethylaminopyridine; 1-2 parts of laureth; The preparation method of the surface treatment agent is as follows: dissolving p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile in 12-14 parts of anhydrous ethanol, adding 1 mol / L sodium ethoxide dropwise after all the solids are dissolved, reflux reacting at 80-85° C. for 1-2 hours, cooling and filtering, and washing with cold ethanol 2-3 times to obtain a conjugated compound; 5-6 parts of polyethylene glycol, 2-3 parts of polyethylene glycol methacrylate phosphate, 3-5 parts of 2,2-dihydroxymethylpropionic acid and 0.5-0.7 parts of 4-dimethylaminopyridine are mixed, and stirred at 100-120° C. for 5-6 hours to obtain an esterification product; Blend 10-15 parts of sodium dodecyl sulfate, 5-6 parts of mica powder, conjugated compound, esterification product, 3-4 parts of silicone oil emulsion, remaining anhydrous ethanol, 1-2 parts of lauryl alcohol polyether and 20-30 parts of water, and stir for 50-60 minutes.

2. The regenerated blended cotton yarn according to claim 1, Features: In terms of weight ratio, the polyethylene glycol methacrylate phosphate: polyethylene glycol: 2,2-dihydroxymethylpropionic acid = 2:5:

5.

3. The production process of a regenerated blended cotton yarn according to claim 1, It is characterized in that The steps include: S1. Preparation of surface treatment agent; dissolving p-methoxy salicylaldehyde and 3,4-dimethoxyphenylacetonitrile in 12-14 parts of anhydrous ethanol, and after all the solids are dissolved, adding 1 mol / L sodium ethoxide dropwise, reflux at 80-85°C for 1-2h, cooling and filtering, and washing with cold ethanol 2-3 times to obtain a conjugated compound; 5-6 parts of polyethylene glycol, 2-3 parts of polyethylene glycol methacrylate phosphate, 3-5 parts of 2,2-dihydroxymethylpropionic acid and 0.5-0.7 parts of 4-dimethylaminopyridine are mixed, and stirred at 100-120° C. for 5-6 hours to obtain an esterification product; Blend 10-15 parts of sodium dodecyl sulfate, 5-6 parts of mica powder, conjugated compound, esterification product, 3-4 parts of silicone oil emulsion, remaining anhydrous ethanol, 1-2 parts of lauryl alcohol polyether and 20-30 parts of water, and stir for 50-60 minutes; S2. Surface treatment of regenerated blended cotton yarn; the regenerated blended cotton yarn was double dipped and double rolled with the surface treatment agent prepared in S1, the concentration of the surface treatment agent was 15-20 g / L, pre-dried at 75-80°C for 3-5 min, and dried at 120-130°C for 40-50 s.

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