Sizing material suitable for dyeing of polyester fabric without desizing and its application

Abstract

The application belongs to the technical field of weaving and printing and dyeing, and particularly relates to a sizing material suitable for desizing-free dyeing of polyester fabric and application thereof. The sizing material comprises the following components in parts by weight: 20-30 parts of acid hydrolyzed starch, and 70-80 parts of polyacrylic sizing material containing super-micro particles. The polyacrylic sizing material contains polycarboxyl cage polysilsesquioxane with a mass ratio of 6-10%, and the super-micro particles are hydrophilic inorganic particles with a size of nanometer or micrometer and a mass ratio of 2-5%. The application provides a sizing material suitable for sizing of polyester yarn without desizing, and the sized polyester fabric can be directly dyed, and the dyed fabric can be directly taken out without desizing and washing, so that high color fastness is achieved and the purpose of energy saving and consumption reduction is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of weaving and printing and dyeing, and particularly relates to a sizing material suitable for desizing-free dyeing of polyester fabric and application thereof. BACKGROUND

[0002] During weaving into gray fabric, polyester yarn is prone to breakage due to tension and friction, affecting the quality of the gray fabric. To avoid breakage, the yarn is generally subjected to sizing treatment before manufacturing, which enhances the cohesion of polyester fibers and makes the yarn surface tight and smooth due to the formation of a firm sizing film, thereby improving the tensile strength and wear resistance of the polyester yarn. Currently, commonly used sizing materials mainly include polyacrylic acid, polyester, polyvinyl alcohol, starch, etc. However, due to the sizing film on the surface of the gray fabric after sizing, direct dyeing of the gray fabric will have problems such as low color fastness, so desizing is required before dyeing to remove the sizing film on the surface of the gray fabric. Common desizing methods include alkali desizing, amylase desizing, acid desizing, and oxidation desizing. However, regardless of which desizing method is used, it is accompanied by a large amount of water consumption and wastewater generation, causing new pollution and energy consumption. With the increasing environmental protection requirements of the textile industry, it is imperative to develop a desizing-free dyeing process for polyester fabric.

[0003] Chinese Patent Application CN202111574753.X discloses a desizing-free sizing treatment method for flax yarn. This method uses liquid wax to size flax fabric, optimizes the composition of the sizing material and the sizing process, and realizes desizing-free sizing of flax fabric. The sized flax fabric can be directly subjected to post-treatment processes including dyeing. However, due to the different characteristics of flax and polyester, this method is not highly applicable to desizing-free sizing and direct dyeing of polyester. SUMMARY

[0004] To solve the technical problem that polyester fabric can only be dyed after sizing and desizing, the present application provides a sizing material suitable for desizing-free dyeing of polyester fabric, to achieve the purpose of desizing-free sizing and direct dyeing of polyester fabric with high color fastness.

[0005] The technical solution adopted by the present application is as follows:

[0006] A polyacrylic acid sizing material containing ultrafine particles, which is a polyacrylic acid sizing material containing polycarboxyl cage-type polyphenylsil sesquioxane and ultrafine particles.

[0007] The mass fraction of the polycarboxyl cage-type polyphenylsil sesquioxane is 6-10%.

[0008] The ultrafine particles are hydrophilic inorganic particles of nanometer or micrometer size, and the mass fraction is 2-5%.

[0009] The present application provides a kind of polyacrylate sizing material containing ultrafine particles as component in sizing pulp, the ultrafine inorganic particles in the polyacrylate sizing material can improve the strength and scratch resistance of polyacrylate sizing material, and the polycarboxyl POSS has good inorganic-organic characteristics due to cage structure and organic functional groups, good heat resistance, on the other hand, the good compatibility of polycarboxyl POSS and hydrophilic ultrafine inorganic particles increases the compatibility of ultrafine inorganic particles and polyacrylate sizing material, and the cage macromolecular structure of POSS enhances the hydrophobicity of polyacrylate sizing material.

[0010] As a preferred embodiment of the present application, the polyacrylate sizing material is a water-soluble polyacrylate sizing material.

[0011] The carboxyl cage polysilsesquioxane is POSS-MAA.

[0012] POSS-MAA containing acrylic has higher compatibility with polyacrylate sizing material.

[0013] As a preferred embodiment of the present application, the particle size of the hydrophilic inorganic particles is 10 nm to 5 μm, and the hydrophilic inorganic particles are one or more of hydrophilic mineral filler powders.

[0014] As a preferred embodiment of the present application, the hydrophilic inorganic particles are one or more of hydrophilic silica, titanium dioxide, alumina powder, kaolin powder and light calcium carbonate powder. The hydrophilic silica has a hydroxyl density of 2 to 7 OH / nm 2 .

[0015] A preparation method of the above-mentioned polyacrylate sizing material containing ultrafine particles, comprising the following steps:

[0016] The ultrafine particles are dispersed in 2 to 5 times the mass of water, and the polycarboxyl cage polysilsesquioxane is added for the first time of high-speed shearing mixing, and then the polyacrylate sizing material is added for the second time of high-speed shearing mixing, and the polyacrylate sizing material containing ultrafine particles is obtained by filtration. In the preparation process, the ultrafine particles and the polycarboxyl POSS are fully mixed by high-speed shearing, and further mixed with the polyacrylate sizing material.

[0017] As a preferred embodiment of the present application, the high-speed shearing rate is 8000 to 10000 rpm / min, and the high-speed shearing time is 60 to 120 min.

[0018] As a preferred embodiment of the present application, the preparation method of the polyacrylate sizing material containing ultrafine particles further comprises standing for 60 to 120 min after the first time of high-speed shearing mixing, and introducing microwave treatment, and the frequency of the microwave is 3.0×10 9 ~ 5.0×10 9Hz, the power of microwave is 300-700W, and the processing time is 1-5min.

[0019] A sizing sizing material suitable for sizing and dyeing of polyester fabric without desizing, comprising the following components in parts by weight:

[0020] 20-30 parts of acid hydrolyzed starch, and 70-80 parts of the polyacrylic sizing material containing super-micro particles.

[0021] The sizing sizing material of the present application is composed of acid hydrolyzed starch and polyacrylic sizing material. The acid hydrolyzed starch is a low-viscosity modified starch obtained by hydrolyzing starch with acid solution at a temperature lower than the gelatinization temperature, and has high hot paste stability and can easily form a uniform sizing film on the surface of the yarn. The polyacrylic sizing material helps to improve the hard and brittle nature of the starch film, improve the adhesion to the yarn, and improve the stability during dyeing. On this basis, the polyacrylic sizing material is modified by super-micro inorganic particles and multi-carboxyl POSS, and the polyacrylic sizing material containing super-micro particles improves the heat resistance of the sizing material during dyeing and the hydrophobicity of the sizing material after sizing, and improves the stability during dyeing. Through the good cooperation between the components, the sizing sizing material provided by the present application can meet the needs of direct dyeing of polyester yarn after sizing, and the polyester fabric does not need to be desized, and has good dyeing color fastness.

[0022] As a preferred embodiment of the present application, the sizing material further comprises one or more of the following components: 2-3 parts of sizing oil, 2-3 parts of smoothing agent, 1-3 parts of milk wax, and 3-5 parts of defoaming agent.

[0023] The present application also provides an application of the above sizing sizing material in dyeing of polyester fabric, and the dyeing process comprises the following steps: sizing the polyester yarn with the sizing sizing material, then weaving the polyester yarn to obtain a polyester fabric, dyeing the polyester fabric, drying, and setting. It should be noted that the sizing process of the polyester yarn can be carried out by using any conventional polyester yarn sizing process, and there is no special feature.

[0024] As a preferred embodiment of the present application, the dyeing temperature is 80-125℃.

[0025] And / or, the dyeing tension is 9-10N.

[0026] And / or, a spraying device is additionally provided during the dyeing temperature rising process, the temperature rising rate is 3-5℃, and the highest temperature is 5-10℃ higher than the set dyeing temperature. The spraying improves the dyeing uniformity and helps to enhance the dyeing color fastness.

[0027] The present application has the following beneficial effects

[0028] The application provides a sizing material suitable for sizing of polyester yarn without desizing, and the sized polyester grey cloth can be directly dyed, and the dyed cloth can be directly taken out without desizing and washing, so that high color fastness is achieved, and the purpose of energy saving and consumption reduction is achieved. DETAILED DESCRIPTION

[0029] Unless otherwise specified, the raw materials used in the application can be purchased from the market or are commonly used in the art; unless otherwise specified, the methods in the following examples are conventional methods in the art.

[0030] The application provides a polyacrylic sizing material containing ultramicro particles, which is a polyacrylic sizing material containing polycarboxyl cage-shaped poly silesquioxane and ultramicro particles.

[0031] The mass percentage of the polycarboxyl cage-shaped poly silesquioxane is 6-10%.

[0032] The ultramicro particles are hydrophilic inorganic particles of nanometer or micrometer level, and the mass percentage is 2-5%.

[0033] In some embodiments provided by the application, the polycarboxyl cage-shaped poly silesquioxane is POSS-MAA. POSS-MAA can be prepared by reacting octavinyl cage-shaped silesquioxane with methacrylic acid, can be purchased from the market, and can also be prepared by the synthesis process reported in the existing literature. The preparation method of POSS-MAA is specifically reported in the journal paper “Preparation and Application of Polycarboxyl P(POSS-MAA) Composite Materials” (Gao Dang'e et al., Fine Chemicals, 2018.12, 35(12):2105-2111.). In the examples or comparative examples provided below, the POSS-MAA used is prepared by the method reported in the paper, and the content of POSS-Vi is 5%.

[0034] In some embodiments provided by the application, the polyacrylic sizing material is a water-soluble polyacrylic acid methyl ester sizing material.

[0035] In some embodiments provided by the application, the hydrophilic inorganic particles have a particle size of 10 nm-5 microns. Preferably, the particle size is 10 nm-1000 nm, and more preferably, the particle size is 10 nm-100 nm.

[0036] In some embodiments provided by the application, the hydrophilic inorganic particles are one or more of hydrophilic silicon dioxide, titanium white powder, alumina powder, kaolin powder and light calcium carbonate powder. The hydrophilic silicon dioxide has a hydroxyl density of 2-7 OH / nm 2 .

[0037] The application also provides a preparation method of the polyacrylic slurry containing the ultrafine particles, which comprises the following steps: dispersing the ultrafine particles into 2-5 times of water, adding the polycarboxyl cage polysilsesquioxane to perform first high-speed shearing mixing, adding the polyacrylic slurry to perform second high-speed shearing mixing, and filtering to obtain the polyacrylic slurry containing the ultrafine particles. The high-speed shearing rate is 8000-10000 rpm / min, and the high-speed shearing time is 60-120 min.

[0038] In some embodiments provided by the application, the preparation method of the polyacrylic slurry containing the ultrafine particles further comprises standing for 60-120 min after the first high-speed shearing mixing, and introducing microwave treatment, wherein the frequency of the microwave is 3.0x10 9 ~5.0x10 9 Hz, the power of the microwave is 300-700 W, and the treatment time is 1-5 min.

[0039] The application also provides a technical scheme of the sizing slurry suitable for the desizing-free dyeing of polyester fabric, which comprises the following components in weight parts: acid hydrolyzed starch 20-30 parts, and the polyacrylic slurry containing the ultrafine particles 70-80 parts.

[0040] In the sizing slurry provided by the application, the acid hydrolyzed starch used can be a conventional product or be prepared by a conventional process, for example, 2-5 wt% hydrochloric acid solution is added into 35-42 wt% starch milk, stirring is maintained for more than 10 h at 20-55 °C (below the gelatinization temperature), and then neutralization with alkali, filtration, washing, and drying are performed to obtain the acid hydrolyzed starch. Specifically, in the examples or comparative examples provided below, 5 wt% hydrochloric acid solution is mixed with 40 wt% starch milk, stirring (150 rpm / rpm) is maintained for 10 h at 50 °C, and then neutralization with alkali, filtration, washing, and drying are performed to obtain the acid hydrolyzed starch.

[0041] In some embodiments provided by the application, the sizing slurry further comprises one or more of the following components: sizing oil 2-3 parts, smoothing agent 2-3 parts, milk wax 1-3 parts, and defoaming agent 3-5 parts.

[0042] The application also provides the use of the sizing slurry in the dyeing of polyester fabric, and the dyeing process comprises the following steps: using the sizing slurry to size the polyester yarn, then weaving the polyester yarn to obtain the polyester gray fabric, dyeing the polyester gray fabric, taking out the fabric, drying, and setting. The sizing process of the polyester yarn can be performed by using any conventional polyester yarn sizing process, for example, the "two-high-one-low" process, and there is nothing special.

[0043] In some technical schemes provided by the application, the dyeing temperature is 80-125 °C.

[0044] In some technical solutions provided by the present application, the tension is 9-10 N.

[0045] In some technical solutions provided by the present application, a spraying device is further arranged in the dyeing process. The spraying device is arranged in the dyeing temperature rising process, the temperature rising rate is 3-5 DEG C / min, and the highest temperature is 5-10 DEG C higher than the set dyeing temperature.

[0046] Embodiment 1

[0047] A sizing agent suitable for dyeing polyester fabric without desizing, comprising the following components in parts by weight:

[0048] 20 parts of acid hydrolyzed starch, 70 parts of polyacrylic acid sizing agent containing super fine particles, 2 parts of sizing oil, 2 parts of smoothing agent, 1 part of milk wax, and 3 parts of defoaming agent;

[0049] In the polyacrylic acid sizing agent containing super fine particles, the polyacrylic acid sizing agent is water-soluble polymethyl acrylate sizing agent, the super fine particles are nano silicon dioxide, the average particle size is 100 nm, the mass percentage in the whole polyacrylic acid sizing agent containing super fine particles is 2%, and the surface hydroxyl density is 2 / nm 2 The mass percentage of the polycarboxyl cage-shaped polyhedral oligomeric silsesquioxane POSS-MAA in the whole polyacrylic acid sizing agent containing super fine particles is 6%;

[0050] The preparation method of the polyacrylic acid sizing agent containing super fine particles is as follows: the super fine particles are dispersed in 2 times mass of water, the polycarboxyl cage-shaped polyhedral oligomeric silsesquioxane POSS-MAA is added, and then high-speed shearing mixing is carried out at 8000 rpm / min for the first time for 120 min; then the polyacrylic acid sizing agent is added, and then high-speed shearing mixing is carried out at 8000 rpm / min for the second time for 120 min; and finally, the polyacrylic acid sizing agent containing super fine particles is obtained after filtration.

[0051] Embodiment 2

[0052] A sizing agent suitable for dyeing polyester fabric without desizing, comprising the following components in parts by weight:

[0053] 30 parts of acid hydrolyzed starch, 80 parts of polyacrylic acid sizing agent containing super fine particles, 3 parts of sizing oil, 3 parts of smoothing agent, 3 parts of milk wax, and 5 parts of defoaming agent;

[0054] In the polyacrylic acid sizing agent containing super fine particles, the polyacrylic acid sizing agent is water-soluble polymethyl acrylate sizing agent, the super fine particles are nano silicon dioxide, the average particle size is 100 nm, the mass percentage in the whole polyacrylic acid sizing agent containing super fine particles is 3%, and the surface hydroxyl density is 3 / nm 2 The mass percentage of the polycarboxyl cage-shaped polyhedral oligomeric silsesquioxane POSS-MAA in the whole polyacrylic acid sizing agent containing super fine particles is 8%;

[0055] The preparation method of the polyacrylic sizing agent containing the ultrafine particles is as follows: the ultrafine particles are dispersed into 5 times of water by mass, then the polycarboxyl cage-shaped polyhedral oligomeric silsesquioxane POSS-MAA is added and mixed at a high speed of 10000 rpm / min for the first time for 60 min, then the polyacrylic sizing agent is added and mixed at a high speed of 10000 rpm / min for the second time for 60 min, and the polyacrylic sizing agent containing the ultrafine particles is obtained after filtration.

[0056] Example 3

[0057] A sizing agent suitable for desizing-free dyeing of polyester fabric, comprising the following components in parts by weight:

[0058] 25 parts of acid hydrolyzed starch, 75 parts of the polyacrylic sizing agent containing the ultrafine particles, 2 parts of sizing oil, 3 parts of smoothing agent, 3 parts of milk wax, and 4 parts of defoaming agent;

[0059] In the polyacrylic sizing agent containing the ultrafine particles, the polyacrylic sizing agent is a water-soluble polyacrylic acid methyl ester sizing agent, the ultrafine particles are nano silicon dioxide, the average particle size is 200 nm, the mass ratio in the whole polyacrylic sizing agent containing the ultrafine particles is 5%, and the surface hydroxyl density is 3 / nm 2 The polycarboxyl cage-shaped polyhedral oligomeric silsesquioxane POSS-MAA accounts for 10% of the mass of the whole polyacrylic sizing agent containing the ultrafine particles.

[0060] The preparation method of the polyacrylic sizing agent containing the ultrafine particles is as follows: the ultrafine particles are dispersed into 3 times of water by mass, then the polycarboxyl cage-shaped polyhedral oligomeric silsesquioxane POSS-MAA is added and mixed at a high speed of 8000 rpm / min for the first time for 90 min, then the polyacrylic sizing agent is added and mixed at a high speed of 10000 rpm / min for the second time for 90 min, and the polyacrylic sizing agent containing the ultrafine particles is obtained after filtration.

[0061] Example 4

[0062] A sizing agent suitable for desizing-free dyeing of polyester fabric, comprising the following components in parts by weight:

[0063] 20 parts of acid hydrolyzed starch, 70 parts of the polyacrylic sizing agent containing the ultrafine particles, 2 parts of sizing oil, 2 parts of smoothing agent, 1 part of milk wax, and 3 parts of defoaming agent;

[0064] In the polyacrylic sizing agent containing the ultrafine particles, the polyacrylic sizing agent is a water-soluble polyacrylic acid methyl ester sizing agent, the ultrafine particles are nano silicon dioxide, the average particle size is 100 nm, the mass ratio in the whole polyacrylic sizing agent containing the ultrafine particles is 2%, and the surface hydroxyl density is 2 / nm 2 The polycarboxyl cage-shaped polyhedral oligomeric silsesquioxane POSS-MAA accounts for 6% of the mass of the whole polyacrylic sizing agent containing the ultrafine particles.

[0065] The preparation method of the polyacrylic slurry containing ultrafine particles is: dispersing the ultrafine particles into 2 times the mass of water, adding polycarboxyl cage-shaped polyhedral oligomeric silsesquioxane POSS-MAA, and then mixing at a high speed of 8000 rpm / min for the first time for 120 min, standing for 60 min, and introducing microwave treatment, the frequency of the microwave is 3.0 x 10 9 Hz, the power of the microwave is 300 W, the treatment time is 5 min, then adding the polyacrylic slurry for the second time of high speed mixing at 8000 rpm / min for 120 min, and filtering to obtain the polyacrylic slurry containing ultrafine particles.

[0066] Example 5

[0067] A sizing agent suitable for desizing and dyeing of polyester fabric, comprising the following ingredients in parts by weight:

[0068] acid hydrolyzed starch 20 parts, polyacrylic sizing agent containing ultrafine particles 70 parts, sizing oil 2 parts, smoothing agent 2 parts, milk wax 1 part, defoaming agent 3 parts;

[0069] In the polyacrylic sizing agent containing ultrafine particles, the polyacrylic sizing agent is water-soluble polyacrylate sizing agent, the ultrafine particles are nanosilica, the average particle size is 100 nm, the mass ratio in the whole polyacrylic sizing agent containing ultrafine particles is 2%, and the surface hydroxyl group density is 2 / nm 2 , polycarboxyl cage-shaped polyhedral oligomeric silsesquioxane POSS-MAA, the mass ratio in the whole polyacrylic sizing agent containing ultrafine particles is 6%;

[0070] The preparation method of the polyacrylic sizing agent containing ultrafine particles is: dispersing the ultrafine particles into 2 times the mass of water, adding polycarboxyl cage-shaped polyhedral oligomeric silsesquioxane POSS-MAA, and then mixing at a high speed of 8000 rpm / min for the first time for 120 min, standing for 120 min, and introducing microwave treatment, the frequency of the microwave is 5.0 x 10 9 Hz, the power of the microwave is 700 W, the treatment time is 1 min, then adding the polyacrylic slurry for the second time of high speed mixing at 8000 rpm / min for 120 min, and filtering to obtain the polyacrylic slurry containing ultrafine particles.

[0071] Comparative Example 1

[0072] The difference from Example 1 is that acetic acid ester starch is used instead of acid hydrolyzed starch.

[0073] Comparative Example 2

[0074] The difference from Example 1 is that the amount of acid hydrolyzed starch is 50 parts.

[0075] Comparative Example 3

[0076] The difference from Example 1 is that the polyacrylic sizing agent containing super particles is mixed with the nano-silica aqueous dispersion and the polyacrylic sizing agent directly by high-speed shearing.

[0077] Comparative Example 4

[0078] The difference from Example 1 is that the nano-silica is treated with siloxane coupling agent KH551 instead of POSS-MAA.

[0079] Comparative Example 5

[0080] The difference from Example 1 is that vinyl POSS is used instead of POSS-MAA.

[0081] Comparative Example 6

[0082] The difference from Example 1 is that hydrophobic nano-silica (surface hydroxyl density 0.7 per / nm 2 ) is used instead of hydrophilic nano-silica.

[0083] Comparative Example 7

[0084] The difference from Example 4 is that microwave is applied during the first shearing mixing process, and the standing process is omitted.

[0085] Comparative Example 8

[0086] The difference from Example 4 is that only standing is performed after the first shearing mixing, and microwave is omitted.

[0087] The components of the sizing agent in each of the above examples and comparative examples are mixed and stirred uniformly, and the polyacrylic sizing agent containing super particles is added last to obtain the sizing agent. The sizing agent is used to size the polyester yarn by the conventional "two high and one low" process, and then the polyester yarn is woven into a polyester gray cloth, and then dyed. The pigment is dispersion blue 60, and the dyeing temperature is 100°C. Specifically, first, the temperature is raised to 105°C at a rate of 4°C / min, then kept for 10 min, and then naturally cooled to 100°C, kept for 25 min of dyeing, and the dyeing tension is 9N. After dyeing, the cloth is directly taken out, dried and set. The dyeing performance of the obtained polyester cloth is shown in Table 1. Among them:

[0088] The light fastness / color fastness detection method refers to "GB / T 8427-2019 Textiles-Color Fastness Test-Color Fastness to Artificial Light: Xenon Arc", the exposure condition is A1, and the exposure method is method 1, which requires ≥4 levels;

[0089] The dry rubbing color fastness detection method and the wet rubbing color fastness detection method refer to "GB / T 3920-2008 Textiles-Color Fastness Test-Color Fastness to Rubbing", which requires ≥4 levels, and the water content of the polyester cloth is 100% during the wet rubbing color fastness detection.

[0090] Table 1 dyeing performance of polyester fabric

[0091]

[0092]

[0093] As can be seen from the above table, as shown in Examples 1-3, the polyester gray fabric treated with the sizing material provided in the present application can be directly dyed into fabric, and has high light / bleaching color fastness, dry rubbing color fastness, and wet rubbing color fastness. Specifically, as shown in Comparative Examples 1-6, the sizing material provided for the dyeing of the polyester gray fabric without desizing has an important relationship with the composition of the sizing material, and requires a certain amount of acid hydrolyzed starch and a specific polyacrylic sizing material containing ultrafine particles. As shown in Examples 4-5, further optimization of the preparation method of the polyacrylic sizing material containing ultrafine particles, such as the introduction of microwave treatment, can improve the dyeing effect without desizing. However, as shown in Comparative Examples 7 and 8, the timing and conditions of the introduction of microwave are very important, otherwise it cannot have a significant effect, and even has an adverse effect.

Claims

1. A process for the preparation of a sizing paste suitable for the desizing-free dyeing of polyester fabrics, characterized in that, The following ingredients are included by weight: acid hydrolyzed starch 20-30 parts, polyacrylic acid slurry containing ultrafine particles 70-80 parts; The polyacrylic acid slurry containing ultrafine particles is a polyacrylic acid slurry containing polycarboxyl cage-shaped poly silsesquioxane and ultrafine particles; The mass fraction of the polycarboxyl cage-shaped poly silsesquioxane is 6-10%; The ultrafine particles are hydrophilic inorganic particles of nanometer or micrometer size, with a mass fraction of 2-5%; The preparation method of the polyacrylic acid slurry containing ultrafine particles is as follows: Disperse the ultrafine particles into 2-5 times the mass of water, add polycarboxyl cage-shaped poly silsesquioxane, and perform first high-speed shearing mixing, stand for 60-120 min, then perform microwave treatment, and then add polyacrylic acid slurry for second high-speed shearing mixing, and filter to obtain the polyacrylic acid slurry containing ultrafine particles.

2. A process for preparing a sizing agent for dyeing polyester fabric without desizing according to claim 1, characterized in that, The polyacrylic acid slurry is a water-soluble polyacrylic acid methyl ester slurry.

3. A process for preparing a sizing material suitable for dyeing of polyester fabric without desizing as claimed in claim 1, wherein, The polycarboxyl cage-shaped poly silsesquioxane is POSS-MAA.

4. A process for preparing a sizing material suitable for dyeing of polyester fabric without desizing as claimed in claim 1, wherein, The particle size of the hydrophilic inorganic particles is 10 nm-5 μm, and the hydrophilic inorganic particles are one or more of hydrophilic mineral filler powders.

5. The process for preparing the sizing size for dyeing without desizing of polyester fabric according to claim 1, characterized in that, The slurry further includes one or more of the following ingredients: sizing oil 2-3 parts, smoothing agent 2-3 parts, milk wax 1-3 parts, and defoaming agent 3-5 parts.

6. A process for preparing a sizing material suitable for dyeing of polyester fabric without desizing as claimed in claim 1, wherein, The high-speed shearing rate is 8000-10000 rpm / min, and the high-speed shearing time is 60-120 min.

7. The method for preparing the sizing agent suitable for desizing and dyeing polyester fabric according to claim 1, characterized in that, The frequency of the microwave is 3.0 x 10 9 ~ 5.0 x 10 9 Hz, the power of the microwave is 300 ~ 700 W, and the processing time is 1 ~ 5 min.

8. Use of the process for the preparation of a sizing paste according to any one of claims 1-7 in the dyeing of polyester fabrics, characterized in that, The dyeing process includes the following steps: The polyester yarn is sized using the sizing slurry, and then the polyester yarn is woven to obtain a polyester gray cloth, which is dyed, dried, and set.

9. Use of the process for the preparation of a sizing paste according to claim 8 in the dyeing of polyester fabrics, characterized by the fact that, The dyeing temperature is 80-125℃; And / or, the dyeing tension is 9-10 N; And / or, further comprising spraying during dyeing temperature rising, the temperature rising rate is 3-5℃, and the highest temperature is 5-10℃ higher than the set dyeing temperature. ​

Images