A t / r yarn sizing material and its sizing process

Abstract

The application discloses a kind of T / R yarn sizing sizing material and its sizing process, belong to yarn sizing technical field.In the sizing material of the application, chemical sizing (polyacrylate) is used in combination with vegetable sizing (potato starch) to form a mixed sizing material.The vegetable component can ensure that the yarn is fully wrapped, and in the case of wrapping the yarn, the yarn strength is improved, the yarn friction is reduced, and the yarn wear resistance coefficient is improved.The chemical component can improve the flexibility of the sizing film and strengthen the adhesion, which can further improve the yarn strength and wear resistance.The two components work together to effectively improve the strength, wear resistance and weaving performance of T / R yarn.The application uses the cone yarn method to size T / R yarn, which is simple and efficient.The opening sizing temperature of the application is low, and the sizing temperature is also low.The opening sizing and sizing process can be completed directly in the dye vat without the need for other opening sizing equipment, which not only requires low equipment, but also effectively reduces energy consumption.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of yarn sizing, in particular to a T / R yarn sizing sizing agent and a sizing process thereof. BACKGROUND

[0002] T / R yarn is a polyester and viscose blended yarn, that is, a yarn formed by blending polyester and viscose (artificial cotton), which has the advantages of polyester yarn and artificial cotton yarn, but also has the weaving defects of the two kinds of yarns, such as the defects of low strength and easy breaking of viscose products, and the problems of poor wear resistance and easy dispersion of polyester products, which further leads to easy breaking of T / R yarn after multiple friction during high-speed weaving, seriously hinders the weaving efficiency, and causes many weaving defects, thereby increasing the production cost of textile manufacturers. Therefore, it is necessary to improve the strength and wear resistance of T / R yarn, and further improve its weavability.

[0003] Yarn sizing is an important means to improve the weavability of yarn. The current textile sizing formula includes main sizing agent and auxiliary sizing agent. The main sizing agent considers the sizing difficulty and sizing cost, and the sizing agent used for T / R yarn sizing is mainly PVA, and the auxiliary sizing agent is mainly wax sheet for softening and smoothing. However, PVA has high requirements for sizing conditions, needs to be steamed at a temperature above 100℃ with pressure, and finally the sizing agent can be obtained. In the sizing process, the energy consumption is large, and the sizing equipment has high requirements. In addition, the improvement effect of PVA sizing agent on the strength and wear resistance of T / R yarn is not very good. Therefore, it is necessary to develop a sizing agent and a sizing process which has low requirements for equipment, low energy consumption, and can significantly improve the strength and wear resistance of T / R yarn. SUMMARY

[0004] The purpose of the present application is to provide a T / R yarn sizing sizing agent and a sizing process thereof, so as to improve the strength of T / R yarn, enhance its wear resistance (or wear resistance), and meet the demand of high-speed weaving. At the same time, the problems of high requirements for sizing equipment and high energy consumption of the existing sizing process are solved.

[0005] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0006] One of the technical solutions of the present application is a T / R yarn sizing sizing agent, the raw materials of which include potato starch and polyacrylate, and the mass ratio of the potato starch and the polyacrylate is 1:1-1.5.

[0007] Further, the mass ratio of the potato starch and the polyacrylate is preferably 1:1.2.

[0008] Further, the raw materials further include diethanolamine, dopamine and sodium alginate.

[0009] Further, the potato starch, polyacrylate, diethanolamine, dopamine and sodium alginate are all ground to a particle size of ≤0.15mm (100 mesh) before use to prevent the raw materials, especially the polyacrylate particles, from being too large, causing particle crystallization and affecting the slurry wrapping.

[0010] Further, the amount of sodium alginate is 20-25wt.% of the polyacrylate.

[0011] Further, the amount of dopamine is 10-20wt.% of the potato starch; and the mass ratio of dopamine to diethanolamine is 1:2-4.

[0012] Technical solution two of the application: a T / R yarn sizing process, comprising the following steps: adding potato starch into a sizing bucket, heating to 80℃, adding water at a liquid ratio of 1:3-4, stirring for 30-40min to obtain a paste-like starch; adding polyacrylate into the paste-like starch, and adding water to a liquid ratio of 1:5-7, and continuing to stir for 10-30min to obtain a sizing slurry; injecting the sizing slurry into a dye vat, then placing T / R cheese yarn in the sizing slurry in the dye vat and running the sizing process to size; after the sizing process runs for 30-40min, adding a softener into the dye vat (without draining the liquid, directly adding the softener into the sizing slurry after the sizing process runs), continuing to run the sizing process to perform softening treatment; after the softening treatment ends, taking out the yarn from the vat, dehydrating and drying.

[0013] Technical solution three of the application: a T / R yarn sizing process, comprising the following steps: adding potato starch into a sizing bucket, heating to 80℃, adding water at a liquid ratio of 1:3-4, stirring for 30-40min to obtain a paste-like starch; adding polyacrylate, diethanolamine, dopamine and sodium alginate into the paste-like starch, and adding water to a liquid ratio of 1:5-7, and adjusting the pH to 8.0-8.5, and continuing to stir for 10-30min to obtain a sizing slurry; injecting the sizing slurry into a dye vat, then placing T / R cheese yarn in the sizing slurry in the dye vat and running the sizing process to size; after the sizing process runs for 30-40min, adding a softener into the dye vat (without draining the liquid, directly adding the softener into the sizing slurry after the sizing process runs), continuing to run the sizing process to perform softening treatment; after the softening treatment ends, taking out the yarn from the vat, dehydrating and drying.

[0014] After adding polyacrylate or adding polyacrylate, diethanolamine, dopamine and sodium alginate into the paste-like starch and adding water, the temperature of the sizing slurry decreases, and after continuing to stir for 10-30min, the temperature of the sizing slurry rises, at this time, if the temperature of the sizing slurry ≤60℃, the sizing slurry can be directly injected into the dye vat, and if the temperature of the sizing slurry >60℃, the sizing slurry is cooled to 60℃ before being injected into the dye vat.

[0015] Further, the viscosity of the sizing pulp is 6±2 mPa·s. Too low viscosity will cause too low yarn wrapping coefficient, and too high viscosity will cause yarn weaving stiffness, affecting the hand feeling of finished products. The viscosity of 6±2 mPa·s can ensure the yarn sizing effect and ensure the weaving effect.

[0016] Further, the preparation method of the T / R cheese is: winding the dyed, soaped and dried T / R yarn on the bobbin, and carrying out loose bobbin to obtain the T / R cheese.

[0017] Further, the single-axis yarn net weight of the T / R cheese is 900-930 g, and the density is 0.35-0.37 g / cm 3 .

[0018] Further, the amount of potato starch is 2.8-3.2% of the net weight of yarn in the T / R cheese; the amount of softener is 2.8-3.2% of the mass of yarn in the T / R cheese.

[0019] Further, the amount of potato starch is preferably 3.0% of the net weight of yarn in the T / R cheese; the amount of softener is 3.0% of the mass of yarn in the T / R cheese.

[0020] Further, the sizing process includes: setting the dyeing temperature to 60℃; setting the pump speed to positive circulation for 3 minutes and reverse circulation for 4 minutes; setting the pump speed opening ratio to positive circulation 93% and reverse circulation 95%. Under this running process, the sizing material can be uniformly absorbed into the yarn, avoiding the difference between the skin and the root, and avoiding uneven sizing.

[0021] Further, the softener includes polyethylene and paraffin; the softening time is 10-20 min.

[0022] Further, the mass ratio of polyethylene to paraffin is 1:1.

[0023] Further, the specific operation of dewatering is: dewatering to 50% of the moisture content of the yarn; the specific operation of drying is: drying to 10% of the moisture content of the yarn.

[0024] Most of the slurry requires high opening, and needs to be heated to 95 DEG C or more to be mixed into paste, but the yarn sizing process is affected by the equipment factor, and the maximum temperature of the bucket can be heated to 80 DEG C, in this case, most of the sizing problems are that additional equipment is needed to open the slurry, and after the slurry is opened, the slurry is transported to the dye vat quickly to prevent the slurry from coagulating due to long storage time, but high-temperature transportation will violate the safety production regulations, and workers are easily scalded. In order to solve the above problems, the present application uses potato starch and polyacrylate as the main components of the sizing material, and through process refinement, the 80 DEG C high temperature reached by the dye vat bucket is directly used to complete the opening of the slurry in the barrel, and the sizing material can be obtained, which can avoid the production safety hazard. And the sizing material composition and sizing process according to the present application will not cause the sizing material to be blocked, and the sizing material can be well formed into paste.

[0025] The sizing material composition, sizing process, cheese density, net weight, sizing process and other factors will affect the sizing effect, and the strength, wear resistance and weaving performance of the yarn after sizing. The present application adjusts and controls the sizing material composition, sizing process, cheese structure and sizing process parameters, so that the factors are coordinated, the best sizing effect is realized, and the T / R yarn after sizing has high strength, high wear resistance and good weaving performance.

[0026] The present application discloses the following technical effects:

[0027] (1) In the sizing material of the present application, the chemical sizing (polyacrylate) is used in combination with the plant sizing (potato starch) to form a mixed sizing material, the plant component can ensure that the yarn is fully wrapped, the yarn strength is improved in the wrapped yarn, the yarn friction is reduced, the yarn wear resistance coefficient is improved, the chemical component can improve the flexibility of the sizing film and the adhesion, and the yarn strength and wear resistance can be further improved. The two are coordinated, and the strength, wear resistance and weaving performance of the T / R yarn are effectively improved.

[0028] (2) The application can add diethanolamine, dopamine and sodium alginate in the sizing material while taking potato starch and polyacrylate as the main raw materials of the sizing material. Dopamine can form a polydopamine adhesion layer with strong adhesion on the surface of potato starch in weak alkaline environment, improve the adhesion between potato starch and yarn, and further improve the film forming effect of the sizing material; diethanolamine contains rich hydroxyl hydrophilic groups, and the nitrogen atom has strong electron negativity and strong lone pair, can produce hydrogen bond with the hydroxyl on the surface of the yarn and the polar bond in the dopamine adhesion layer, and attract each other together, can better wrap the surface of the yarn and enter the inside of the yarn, thereby improving the sizing rate and penetration rate of the yarn, and further improving the cohesion, wear resistance and strength of the sized yarn; the sodium alginate molecule has strong carboxyl and hydroxyl groups, good hydrophilic performance and high viscosity, has good permeability, can make the sizing material better enter the inside of the yarn, and has good toughness after film forming, can effectively improve the strength and wear resistance of the sizing material after film forming.

[0029] (3) The application can be used for sizing T / R yarn by the method of cone yarn, and the process is simple and efficient.

[0030] (4) The application has low opening sizing temperature and sizing temperature, and the opening sizing and sizing process can be directly completed in the dye vat, without other opening sizing equipment, which not only has low requirement for equipment, but also can effectively reduce energy consumption. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the drawings. Such description, however, is to be considered in connection only with the embodiments described herein, and is not intended to limit the application. Rather, the specific aspects, features and embodiments of the present application are to be considered exemplary only, and the scope of the application is to be understood as including any such aspects, features and embodiments.

[0032] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Additionally, the use of the term "about" in relation to a value or range of values is to be understood as encompassing each and every value within the range and the term "comprising" is to be understood as encompassing the more restrictive term "consisting of". Further, the use of the term "comprising" is to be understood as encompassing the more restrictive term "consisting of".

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present application, preferred methods and materials are described. All documents mentioned herein are incorporated by reference to disclose and describe in full the methods and / or materials which are described therein. In the case of conflict between the present specification and any document incorporated herein by reference, the present specification will control.

[0034] Many modifications and variations of the specific embodiments of the application can be made without departing from the scope or spirit of the application. Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application. The specification and examples are illustrative only.

[0035] As used herein, the terms "comprise", "comprising", "include", "including", "have" and "having" and the like are open-ended terms that are intended to mean including but not limited to.

[0036] The polyacrylate used in the following examples and comparative examples is polyacrylate HL-610.

[0037] The raw materials of potato starch, polyacrylate, diethanolamine, dopamine and sodium alginate used in the following examples and comparative examples are ground and passed through a 100 mesh sieve before use. After grinding and sieving, they are weighed.

[0038] The T / R yarn used in the following examples and comparative examples is a 32ST / R yarn.

[0039] In the following examples and comparative examples, after adding polyacrylate or adding polyacrylate, diethanolamine, dopamine and sodium alginate to the paste-like starch and adding water, the temperature of the sizing material decreases. After continuing to stir for 10-30 min, the temperature of the sizing material rises. At this time, if the temperature of the sizing material is ≤60°C, it can be directly injected into the dyeing vat. If the temperature of the sizing material is >60°C, it is cooled to 60°C before being injected into the dyeing vat.

[0040] Example 1

[0041] The raw materials of the sizing material for T / R yarn sizing include potato starch and polyacrylate in a mass ratio of 1:1.2.

[0042] The T / R yarn sizing process is as follows:

[0043] (1) Yarn preparation: the dyed, soaped and dried T / R yarn is wound on a bobbin and loosened to obtain T / R cheese with a single shaft yarn net weight of 920 g and a density of 0.36 g / cm 3 .

[0044] (2) Sizing preparation: 3% by mass of potato starch based on the mass of the T / R yarn to be sized (the net weight of the yarn in the T / R cheese) was added to a sizing bucket, heated to 80°C, and water was added at a liquor ratio of 1:3.5, and stirred for 30 min to dissolve the potato starch, obtaining a paste-like starch; 3.6% by mass of polyacrylate based on the mass of the T / R yarn to be sized (i.e., the mass ratio of potato starch to polyacrylate was 1:1.2) was added to the paste-like starch, and water was added to a liquor ratio of 1:6 (the mass of the water added twice was 6 times the total mass of the potato starch and polyacrylate), and stirring was continued for 10 min, obtaining a sizing material (the viscosity was 4.9 mPa-s) for sizing.

[0045] (3) Sizing: the sizing material was injected into a dye vat, and then the T / R cheese was placed in the sizing material in the dye vat and a sizing process was run to size the T / R yarn, the sizing process including: the temperature of the dye vat was set to 60°C for heat preservation; the pump speed was set to 3 min of forward circulation and 4 min of reverse circulation; the pump speed opening ratio was set to 93% for forward circulation and 95% for reverse circulation; after the sizing process was run for 30 min, 3% by mass of a softener based on the mass of the T / R yarn to be sized was added to the dye vat (without draining, the softener was directly added to the sizing material after the sizing process was run, and the softener was a mixture of polyethylene and paraffin at a mass ratio of 1:1), and the previous sizing process was continued to be run for 10 min for softening treatment; after the softening treatment was completed, the yarn was taken out of the vat, dewatered to a moisture content of 50%, and then dried in a Lixian radio frequency dryer to a moisture content of 10%. After the sizing and drying, the yarn was observed to have a clear upright feeling, a strong yarn pattern, and a hair that was well laid.

[0046] Example 2

[0047] The raw materials of the sizing material for the T / R yarn included potato starch and polyacrylate at a mass ratio of 1:1, and 10 wt.% of dopamine based on the mass of the potato starch, 2 times the mass of the dopamine of diethanolamine (the mass ratio of dopamine to diethanolamine was 1:2), and 20 wt.% of sodium alginate based on the mass of the polyacrylate.

[0048] The T / R yarn sizing process had the following steps:

[0049] (1) Yarn preparation: the T / R yarn after dyeing, soaping, and drying was wound on a bobbin, and the bobbin was loosened to obtain a T / R cheese with a single shaft yarn net weight of 900 g and a density of 0.35 g / cm 3 .

[0050] (2) Sizing preparation: add potato starch with a mass of 2.8% of the mass of the T / R yarn to be sized (the net weight of the yarn in the T / R cheese) into the sizing bucket, heat to 80°C, add water at a ratio of 1:3.5, stir for 30 min to dissolve the potato starch, and obtain a paste-like starch; add polyacrylate with a mass of 2.8% of the mass of the T / R yarn to be sized (i.e., the mass ratio of potato starch to polyacrylate is 1:1) and the proportioned amounts of diethanolamine, dopamine, and sodium alginate into the paste-like starch, and add water to a ratio of 1:6 (the mass of the water added twice is 6 times the total mass of the potato starch, polyacrylate, dopamine, diethanolamine, and sodium alginate), and adjust the pH to 8.0, and continue stirring for 10 min to obtain sizing slurry (the viscosity is 6.0 mPa s).

[0051] (3) Sizing: inject the sizing slurry into the dye vat, then place the T / R cheese in the sizing slurry in the dye vat and run the sizing process to size the T / R yarn, the sizing process includes: setting the temperature of the dye vat to 60°C for heat preservation; setting the pump speed to 3 min of forward circulation and 4 min of reverse circulation; setting the pump speed opening ratio to 93% for forward circulation and 95% for reverse circulation; after running the sizing process for 30 min, add softener with a mass of 2.8% of the mass of the T / R yarn to be sized (without draining, directly add the softener into the sizing slurry after running the sizing process, the softener is a mixture of polyethylene and paraffin at a mass ratio of 1:1) into the dye vat, and continue running the previous sizing process for 10 min of softening treatment; after the softening treatment is completed, remove the yarn from the vat, dewater to a moisture content of 50%, and then dry in a Lixian radio frequency dryer to a moisture content of 10%. After sizing and drying, the yarn is observed to have a clear upright feeling, strong yarn texture, and hair adhesion.

[0052] Example 3

[0053] The raw materials of the sizing slurry for T / R yarn include potato starch and polyacrylate at a mass ratio of 1:1.5, dopamine with a mass of 20 wt.% of the mass of the potato starch, diethanolamine with a mass of 4 times the mass of the dopamine (the mass ratio of dopamine to diethanolamine is 1:4), and sodium alginate with a mass of 25 wt.% of the mass of the polyacrylate.

[0054] The T / R yarn sizing process has the following steps:

[0055] (1) Yarn preparation: wind the dyed, soaped, and dried T / R yarn on a bobbin, and loosen the bobbin to obtain a T / R cheese with a single-axis yarn net weight of 930 g and a density of 0.37 g / cm 3 .

[0056] (2) Sizing preparation: add potato starch with a mass of 3% of the mass of the T / R yarn to be sized (the net weight of the yarn in the T / R cheese) into a sizing bucket, heat to 80°C, add water at a liquor ratio of 1:3.5, stir for 40 min to dissolve the potato starch, and obtain a starch paste; add polyacrylate with a mass of 4.5% of the mass of the T / R yarn to be sized (i.e., the mass ratio of potato starch to polyacrylate is 1:1.5) and the proportioned amounts of diethanolamine, dopamine, and sodium alginate into the starch paste, and add water to a liquor ratio of 1:6 (the mass of the water added twice is 6 times the total mass of the potato starch, polyacrylate, dopamine, diethanolamine, and sodium alginate), and adjust the pH to 8.5, and continue stirring for 30 min to obtain a sizing slurry (the viscosity is 7.3 mPa s).

[0057] (3) Sizing: inject the sizing slurry into a dye vat, then place the T / R cheese in the sizing slurry in the dye vat and run the sizing process to size the T / R yarn, the sizing process includes: setting the temperature of the dye vat to 60°C for heat preservation; setting the pump speed to 3 min of forward circulation and 4 min of reverse circulation; setting the pump speed opening ratio to 93% for forward circulation and 95% for reverse circulation; after running the sizing process for 40 min, add a softener with a mass of 3% of the mass of the T / R yarn to be sized into the dye vat (without draining the liquid, directly add the softener into the sizing slurry after running the sizing process, the softener is a mixture of polyethylene and paraffin at a mass ratio of 1:1), and continue running the previous sizing process for 20 min of softening treatment; after the softening treatment is completed, remove the yarn from the vat, dewater to a moisture content of 50%, and then dry in a Lixian radio frequency dryer to a moisture content of 10%. After sizing and drying, the yarn is observed to have a clear upright feeling, a strong yarn pattern, and a well-laid hair.

[0058] Example 4

[0059] The raw materials of the T / R yarn sizing slurry include potato starch and polyacrylate at a mass ratio of 1:1.2, dopamine with a mass of 15 wt.% of the mass of the potato starch, diethanolamine with a mass of 3 times the mass of the dopamine (the mass ratio of dopamine to diethanolamine is 1:3), and sodium alginate with a mass of 22 wt.% of the mass of the polyacrylate.

[0060] The T / R yarn sizing process, the steps are as follows:

[0061] (1) Yarn preparation: wind the dyed, soaped, and dried T / R yarn on a bobbin, and loosen the bobbin to obtain a T / R cheese with a single-axis yarn net weight of 910 g and a density of 0.36 g / cm 3 .

[0062] (2) Sizing preparation: add potato starch with a mass of 3% of the mass of the T / R yarn to be sized (the net weight of the yarn in the T / R cheese) into a sizing bucket, heat to 80°C, add water at a liquor ratio of 1:3.5, stir for 30 min to dissolve the potato starch, and obtain a starch paste; add polyacrylate with a mass of 3.6% of the mass of the T / R yarn to be sized (i.e. the mass ratio of potato starch to polyacrylate is 1:1.2) and the proportioned amounts of diethanolamine, dopamine and sodium alginate into the starch paste, and add water to a liquor ratio of 1:6 (the mass of the water added twice is 6 times the total mass of the potato starch, polyacrylate, dopamine, diethanolamine and sodium alginate), and adjust the pH to 8.0, and continue to stir for 10 min to obtain sizing material (the viscosity is 6.6 mPa·s).

[0063] (3) Sizing: inject the sizing material into a dye vat, then place the T / R cheese in the sizing material in the dye vat and run the sizing process to size the yarn, the sizing process includes: setting the temperature of the dye vat to 60°C for heat preservation; setting the pump speed to 3 min of forward circulation and 4 min of reverse circulation; setting the pump speed opening ratio to 93% for forward circulation and 95% for reverse circulation; after running the sizing process for 30 min, add softener with a mass of 3% of the mass of the T / R yarn to be sized (without draining, directly add the softener into the sizing material after running the sizing process, the softener is a mixture of polyethylene and paraffin at a mass ratio of 1:1) in the dye vat, and continue to run the previous sizing process for 10 min of softening treatment; after the softening treatment is completed, take out the yarn, dewater to a moisture content of 50%, and then dry in a Lixian radio frequency dryer to a moisture content of 10%. After the yarn is sized and dried, it can be observed that the yarn has a clear upright feeling, the yarn pattern is strong, and the hair is well attached.

[0064] Comparative Example 1

[0065] The same as Example 2, except that the use of diethanolamine is omitted.

[0066] Comparative Example 2

[0067] The same as Example 2, except that the use of dopamine is omitted.

[0068] Comparative Example 3

[0069] The same as Example 2, except that the use of sodium alginate is omitted.

[0070] Effect verification

[0071] Take the sized yarn prepared in Examples 1-4 and Comparative Examples 1-3 to test the strength, rubbing times and ten million times broken tail number of weaving, and the yarn before sizing is taken as a blank control.

[0072] Strong test method: test according to standard GB / T 3916-2013 "Textiles-determination of breaking force and elongation of single yarns in the form of packages".

[0073] Friction times test method: test according to standard FZ / T 01058-1999 "Yarn abrasion test method reciprocating rubbing roller method".

[0074] Woven ten million times broken tail times test method: test on MYTHOS type air jet loom, speed 700r / min.

[0075] Test results are shown in Table 1:

[0076] Table 1

[0077] Specimen Strength (cN / dtex) Friction times Weaving 100,000 times break tail times Example 1 615 21 20 Example 2 754 29 12 Example 3 769 31 11 Example 4 783 32 10 Comparative Example 1 738 28 13 Comparative Example 2 724 26 15 Comparative Example 3 718 25 16 Blank control group 560 15 43

[0078] From the results of Table 1, compared with unsized T / R yarn, the T / R yarn sized by the sizing process of Example 1 of the present application has a strength increased by about 10%; the friction times are obviously increased by about 40%, indicating that the abrasion resistance is greatly improved; the ten million times broken tail times is decreased by about half, which can obviously improve the weaving efficiency and reduce the defect rate.

[0079] Compared with the sizing process of Example 1, Examples 2-4 adding diethanolamine, dopamine and sodium alginate in the sizing material can further improve the strength, abrasion resistance and weaving performance of T / R yarn.

[0080] The above-described examples are only to describe the preferred mode of the present application, and not to limit the scope of the present application, without departing from the design spirit of the present application, various modifications and improvements of the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A T / R yarn on-dyeing process characterized by, The method comprises the following steps: potato starch is added into a beater, heated to 80℃, water is added at a ratio of 1:3-4, and stirred for 30-40min to obtain a paste; polyacrylate, diethanolamine, dopamine and sodium alginate are added into the paste, and water is added to a ratio of 1:5-7, and the pH is adjusted to 8.0-8.5, and the paste is stirred for 10-30min to obtain a sizing paste; the sizing paste is injected into a dye vat, and then T / R cone yarn is placed in the sizing paste in the dye vat and runs a sizing process; after the sizing process runs for 30-40min, a softener is added into the dye vat, and the sizing process continues to run for softening treatment; after the softening treatment is completed, the yarn is taken out of the vat, dehydrated and dried; the mass ratio of the potato starch to the polyacrylate is 1:1.2; the amount of the sodium alginate is 20-25wt.% of the polyacrylate; the amount of the dopamine is 10-20wt.% of the potato starch; the mass ratio of the dopamine to the diethanolamine is 1:2-4; the amount of the potato starch is 2.8-3.2% of the net weight of the yarn in the T / R cone yarn; the amount of the softener is 2.8-3.2% of the mass of the yarn in the T / R cone yarn; the sizing process comprises: setting the temperature of the dye vat to 60℃; setting the pump speed to positive circulation for 3min and reverse circulation for 4min; setting the pump speed opening ratio to 93% for positive circulation and 95% for reverse circulation; the softener comprises polyethylene and paraffin; the softening treatment time is 10-20min; the specific operation of the dehydration is to dehydrate to a yarn moisture content of 50%; the specific operation of the drying is to dry to a yarn moisture content of 10%.