Starch type impregnating compound as well as preparation method and application thereof

Abstract

The invention relates to a starch type impregnating compound and a preparation method and application thereof, the impregnating compound comprises an active component and water, the active component comprises the following raw materials in parts by weight: 45-65 parts of a starch-based film-forming agent, 5-10 parts of a plasticizer, 15-20 parts of a lubricant, 1-2.5 parts of an emulsifier, 5-8 parts of a coupling agent, 1-2.5 parts of a softening agent, 0.5-1.5 parts of a preservative and 0.02-0.05 part of a defoaming agent; wherein the starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, starch octenyl succinate and modified starch in a mass ratio of 1: (1.1-1.5): (0.5-0.8); the lubricant is a composition of carnauba wax and hydrogenated soybean oil. The impregnating compound disclosed by the invention can effectively improve the wear resistance of low-twist yarns, reduce hairiness and enhance bundling property and weaving performance, and can be used for preparing glass fiber spinning spun yarns.

Description

Technical Field

[0001] The invention relates to the technical field of glass fiber surface treatment agents, and in particular to a starch-type sizing agent and a preparation method and application thereof. Background Art

[0002] Glass fiber and its products are new inorganic non-metallic materials, and are a new material sub-industry that the country encourages to develop. Electronic yarn is a glass fiber with a single filament diameter of 9 microns or less. Compared with other glass fiber varieties, it has higher requirements for production technology and processes, overcomes the brittleness of the glass fiber material itself, and has the advantages of high strength, light weight, and good electrical properties. It can be used in high-end fields such as the electronics industry. The large-scale application of electronic yarn and electronic cloth as substrates in the copper clad laminate industry solves the problems of PCB short circuits and open circuits. It is a key raw material that affects the performance of copper clad laminates and PCBs, and thus plays a fundamental role in the innovation and development of the entire electronics industry.

[0003] The application requirements of electronic-grade glass fiber cloth products in the copper-clad laminate and printed circuit board industries are becoming increasingly stringent, especially in terms of fabric defects, dimensional stability, thickness and fabric air permeability. Although the high-twist weaving and high-pressure fiber opening processes commonly used in the industry can meet the requirements to a certain extent, there are also some problems. For example, the high-pressure fiber opening method is prone to problems such as broken wire and weft bias on the fabric surface, which has an adverse effect on subsequent use. For example, poor wetting and dimensional deviation will occur during downstream gluing, and the use effect will be poor. Therefore, the use of high-pressure fiber opening has certain limits. Low-twist yarn weaving does not require high-pressure fiber opening, and only atmospheric pressure or low-pressure spraying can obtain low air permeability and flat fabric performance. But at the same time, it has the disadvantages of poor wear resistance, high hairiness, poor bundling and weaving performance. This puts higher requirements on the sizing agent as its surface treatment agent, which requires the sizing agent to improve the wear resistance of low-twist yarn, reduce hairiness, and improve bundling and weaving performance. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a starch-type sizing agent which can effectively improve the wear resistance of low-twist yarn, reduce hairiness, enhance bundling and weaving performance, and a preparation method and application thereof.

[0005] To achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a starch-type wetting agent, the wetting agent comprising an active ingredient and water, the mass ratio of the active ingredient to water being (0.05-0.15):1, the active ingredient comprising the following raw materials in parts by weight: 45-65 parts of a starch-based film-forming agent, 5-10 parts of a plasticizer, 15-20 parts of a lubricant, 1-2.5 parts of an emulsifier, 5-8 parts of a coupling agent, 1-2.5 parts of a softener, 0.5-1.5 parts of a preservative and 0.02-0.05 parts of a defoaming agent; wherein the starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester and modified starch in a mass ratio of 1: (1.1-1.5): (0.5-0.8), the manufacturer of the modified starch is Guangdong Huimei Starch Technology Co., Ltd., and the brand is HM-318; the plasticizer is tributyl citrate; and the lubricant is a composition of carnauba wax and hydrogenated soybean oil.

[0006] Because the inherent polyhydroxy structure of starch gives the film-forming agent a strong hydrophilicity, resulting in poor water resistance, in order to overcome this shortcoming, the present invention selects carnauba wax and hydrogenated soybean oil as lubricants and hydrophobic agents. The high fatty alcohols and long-chain alkanes in carnauba wax and the saturated fatty acids contained in hydrogenated soybean oil can improve the oxidation stability and lubricity of the sizing agent, effectively improve the binding force of the film-forming agent and the lubricant, so that the sizing agent film has excellent flexibility and lubricity, and because the presence of carnauba wax constitutes a hard dispersed phase, it is beneficial to improve the wear resistance of low-twist yarns, and the addition of hydrogenated soybean oil can improve the fluidity of carnauba wax and reduce its viscosity, thereby improving the lubricity and bundling of the yarn. Therefore, the synergy of carnauba wax and hydrogenated soybean oil is more conducive to reducing the water resistance of starch film and improving the wear resistance of starch film.

[0007] Oxidized hydroxypropyl starch (OHS), modified starch and octenyl succinate starch ester can construct a film-forming polymer network, and the amphiphilic octenyl succinate starch ester can stabilize carnauba wax, so that the starch-based film-forming agent can be well compatible with carnauba wax. The three ingredients work together to enable the film-forming agent to subsequently form a firm, clear, and continuous film, thereby giving the yarn stiffness and improving the yarn's bundling. At the same time, because octenyl succinate starch ester has low viscosity properties, it can also reduce viscosity, thereby improving the stability and fluidity of the sizing agent.

[0008] Preferably, the emulsifier is polyoxyethylene fatty acid ester, which further emulsifies the lubricant to improve its compatibility in the system.

[0009] Preferably, the coupling agent is a silane coupling agent. The coupling agent can play a bridging role between organic matter and inorganic matter, thereby further improving the bonding between glass fiber and film-forming agent and reducing the waste of sizing agent during precursor forming. The silane coupling agent can effectively maintain the bonding strength between glass fiber and sizing agent after precursor conditioning and reduce the hairiness of bobbin yarn.

[0010] Preferably, the softener is aliphatic polyamide and / or ester-based quaternary ammonium salt. The softener has good compatibility with other components of the sizing agent and can effectively improve the softness of the yarn, making it more suitable for weaving.

[0011] Preferably, the preservative is sodium methyl paraben.

[0012] Preferably, the defoaming agent is a phosphate defoaming agent.

[0013] Preferably, the starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester and modified starch in a mass ratio of 1:1.2:0.7.

[0014] Preferably, the lubricant is a composition of carnauba wax and hydrogenated soybean oil in a mass ratio of (1.2-1.5): 1. More preferably, the lubricant is a composition of carnauba wax and hydrogenated soybean oil in a mass ratio of 1.3: 1.

[0015] In a second aspect, the present invention provides a method for preparing the starch-type wetting agent, comprising the following steps: S1, mixing the starch-based film-forming agent in a formula amount with water, stirring evenly, heating and keeping warm, and cooling to obtain a film-forming agent solution; S2, mixing the formulated amount of plasticizer, lubricant, emulsifier, coupling agent, softener, preservative and defoamer, stirring evenly to obtain an additive solution; S3, mixing the film-forming agent solution and the auxiliary agent solution, stirring until an emulsion is formed, and obtaining the starch-based wetting agent.

[0016] Preferably, the stirring speed in step S1 is 200-300 rpm, the stirring time is 10-20 min, the insulation temperature is 90-100° C., and the insulation time is 20-40 min.

[0017] Preferably, the stirring temperature in step S2 is 60-70° C., the stirring speed is 300-500 rpm, and the stirring time is 20-40 min.

[0018] In a third aspect, the present invention provides the use of the starch-based wetting agent in the preparation of glass fiber textile yarn.

[0019] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a composition of carnauba wax and hydrogenated soybean oil as a lubricant for the starch-based impregnating agent, which can provide a lubricating effect while also improving the hydrophobicity of the impregnating agent and the wear resistance of the yarn. The starch-based film-forming agent in the present invention is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester and modified starch in a mass ratio of 1: (1.1-1.5): (0.5-0.8). These three components have a synergistic effect, so that the film-forming agent can subsequently form a firm, clear and continuous film, thereby giving the yarn stiffness and improving the bundling of the yarn. Since the starch-based impregnating agent of the present invention can effectively improve the wear resistance of low-twist yarn, reduce hairiness, enhance bundling and weaving properties, it can be used to prepare glass fiber textile spun yarn. DETAILED DESCRIPTION

[0020] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0021] The sources of the raw materials used in the following examples and comparative examples are as follows: Potato oxidized hydroxypropyl starch: the manufacturer is Gansu Fengshou Agricultural Technology Co., Ltd., the brand is FS9170; Octenyl succinate starch ester: Hubei Changao Pharmaceutical Co., Ltd.; Modified starch: the manufacturer is Guangdong Huimei Starch Technology Co., Ltd., the brand is HM-318; Tributyl citrate: manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., brand number PB06267; Carnauba wax: The manufacturer is Shanghai MacLean Biochemical Technology Co., Ltd., brand number C804522, melting point > 83°C, light yellow; Hydrogenated soybean oil: the manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., brand number PA97037; Palm oil: The manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., brand number DB96782; Emulsifier: fatty acid polyoxyethylene ester, manufactured by Jiangsu Hai'an Petrochemical Plant, model A-103; Coupling agent: silane coupling agent KH-602, manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., model number is PB990698; Aliphatic polyamide: The manufacturer is Lubrizol, the model is Aptalon™ 9500; Ester quaternary ammonium salt: disalmitate carboxyethyl hydroxyethyl methyl ammonium sulfate, the manufacturer is Jingzhou Yinjie Chemical Co., Ltd., model number is TEP-75; Preservative: sodium methyl paraben, manufacturer is Guangdong Wengjiang Chemical Reagent Co., Ltd., brand name PA59051; Defoamer: Phosphate defoamer, manufacturer: Guangzhou Oupeng Chemical Co., Ltd., model: MOUSSEX ® 941PL.

[0022] Unless otherwise specified, other materials, reagents, etc. used in the examples and comparative examples can be obtained from commercial sources.

[0023] Example 1

[0024] A starch-based wetting agent, comprising an active ingredient and water, wherein the mass ratio of the active ingredient to the water is 0.1:1, and the active ingredient is composed of the following raw materials in parts by weight: 55 parts of a starch-based film-forming agent, 6 parts of a plasticizer, 16 parts of a lubricant, 2 parts of an emulsifier, 7 parts of a coupling agent, 1.5 parts of a softener, 1.3 parts of a preservative, and 0.03 parts of a defoamer; wherein the starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester, and modified starch in a mass ratio of 1:1.2:0.7; the plasticizer is tributyl citrate; the lubricant is a composition of carnauba wax and hydrogenated soybean oil in a mass ratio of 1.3:1; the emulsifier is fatty acid polyoxyethylene ester; the coupling agent is a silane coupling agent; the softener is an aliphatic polyamide; the preservative is sodium methyl paraben; and the defoamer is a phosphate defoamer.

[0025] The preparation method of the starch-type wetting agent comprises the following steps: S1. Mix the starch-based film-forming agent in the formula amount with water, stir at 250 rpm for 15 min, heat to 95° C. and keep warm for 30 min, and cool to obtain a film-forming agent solution; S2, mixing the formulated amount of plasticizer, lubricant, emulsifier, coupling agent, softener, preservative and defoamer, stirring evenly to obtain an additive solution; S3, mixing the film-forming agent solution and the auxiliary agent solution, stirring at 65° C. and 400 rpm for 30 min to form an emulsion, and obtaining the starch-based wetting agent.

[0026] Example 2

[0027] A starch-based wetting agent, comprising an active ingredient and water, wherein the mass ratio of the active ingredient to water is 0.15:1, and the active ingredient is composed of the following raw materials in parts by weight: 45 parts of a starch-based film-forming agent, 5 parts of a plasticizer, 15 parts of a lubricant, 1 part of an emulsifier, 5 parts of a coupling agent, 1 part of a softener, 0.5 parts of a preservative, and 0.02 parts of a defoamer; wherein the starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester, and modified starch in a mass ratio of 1:1.1:0.5; the plasticizer is tributyl citrate; the lubricant is a composition of carnauba wax and hydrogenated soybean oil in a mass ratio of 1.5:1; the emulsifier is fatty acid polyoxyethylene ester; the coupling agent is a silane coupling agent; the softener is an ester-based quaternary ammonium salt; the preservative is sodium methyl paraben, and the defoamer is a phosphate defoamer.

[0028] The preparation method of the starch-type wetting agent comprises the following steps: S1. Mix the starch-based film-forming agent in the formula amount with water, stir at 200 rpm for 10 min, heat to 90° C. and keep warm for 40 min, and cool to obtain a film-forming agent solution; S2, mixing the formulated amount of plasticizer, lubricant, emulsifier, coupling agent, softener, preservative and defoamer, stirring evenly to obtain an additive solution; S3, mixing the film-forming agent solution and the auxiliary agent solution, stirring at 60° C. and 300 rpm for 40 min to form an emulsion, and obtaining the starch-based wetting agent.

[0029] Example 3

[0030] A starch-type wetting agent, comprising an active ingredient and water, wherein the mass ratio of the active ingredient to the water is 0.05:1, and the active ingredient is composed of the following raw materials in parts by weight: 65 parts of a starch-based film-forming agent, 10 parts of a plasticizer, 20 parts of a lubricant, 2.5 parts of an emulsifier, 8 parts of a coupling agent, 2.5 parts of a softener, 1.5 parts of a preservative, and 0.05 parts of a defoamer; wherein the starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester, and modified starch in a mass ratio of 1:1.5:0.8; the plasticizer is tributyl citrate; the emulsifier is fatty acid polyoxyethylene ester; the coupling agent is a silane coupling agent; the softener is an aliphatic polyamide and an ester-based quaternary ammonium salt in a mass ratio of 1:1; the preservative is sodium methyl paraben; and the defoamer is a phosphate defoamer.

[0031] The preparation method of the starch-type wetting agent comprises the following steps: S1. Mix the starch and water in the formula amount, stir at 300 rpm for 20 min, heat to 100° C. and heat for 20 min, and cool to obtain a gelatinized starch solution; S2, mixing the formulated amount of plasticizer, lubricant, emulsifier, coupling agent, softener, preservative and defoamer, stirring evenly to obtain an additive solution; S3, mixing the film-forming agent solution and the auxiliary agent solution, stirring at 70° C. and 500 rpm for 20 min to form an emulsion, and obtaining the starch-based wetting agent.

[0032] Example 4

[0033] The difference between Example 4 and Example 1 is that the lubricant is a composition of carnauba wax and hydrogenated soybean oil in a mass ratio of 1:1.

[0034] Example 5

[0035] The difference between Example 5 and Example 1 is that the lubricant is a composition of carnauba wax and hydrogenated soybean oil in a mass ratio of 1:1.6.

[0036] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the starch-based film-forming agent in Comparative Example 1 is an equal amount of potato starch.

[0037] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that: potato oxidized hydroxypropyl starch is not added to the starch-based film-forming agent, and octenyl succinate starch ester and modified starch in a mass ratio of 1.2:0.7 are used as the starch-based film-forming agent.

[0038] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that: octenyl succinate starch ester is not added to the starch-based film-forming agent, and potato oxidized hydroxypropyl starch and modified starch in a mass ratio of 1:0.7 are used as the starch-based film-forming agent.

[0039] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that no modified starch is added to the starch-based film-forming agent, and potato oxidized hydroxypropyl starch and octenyl succinate starch ester in a mass ratio of 1:1.2 are used as the starch-based film-forming agent.

[0040] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that the total amount of the starch-based film-forming agent remains unchanged, and the starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester and modified starch in a mass ratio of 1:0.7:1.2.

[0041] Comparative Example 6 The difference between Comparative Example 6 and Example 1 is that the total amount of the starch-based film-forming agent remains unchanged, and the starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester and modified starch in a mass ratio of 0.7:1.2:1.

[0042] Comparative Example 7 The difference between Comparative Example 7 and Example 1 is that the total amount of the starch-based film-forming agent remains unchanged, and the starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester and modified starch in a mass ratio of 1.2:1:0.7.

[0043] Comparative Example 8 The difference between Comparative Example 8 and Example 1 is that carnauba wax is replaced by palm oil.

[0044] Performance Testing 1. Membrane strength test The film strength of the wetting agents of Examples 1-5 and Comparative Examples 1-8 was tested using a bursting tester. The specific data are shown in Table 1.

[0045] The wetting agents of Examples 1-5 and Comparative Examples 1-8 were respectively coated on D450 (single filament diameter 4 microns) ultrafine glass fiber yarn, the oil coating line speed was 20 m / min, the oil content of the tube yarn was controlled at 1.2±0.20%, the weaving speed was 500 rpm, and glass fiber samples of each group were obtained. The glass fiber samples were subjected to the following water resistance test and product performance test.

[0046] 2. Water resistance test 10 cm glass fiber samples prepared with the sizing agents of Examples 1-5 and Comparative Examples 1-8 were taken respectively, immersed in a pure water solution at 25° C. for 6 h, and their mass loss rates were measured. The results are shown in Table 1.

[0047] 3. Product performance test Glass fiber samples prepared with the sizing agents of Examples 1-5 and Comparative Examples 1-8 were respectively tested for migration, broken fiber rate, hairiness rate and yield rate. The specific test methods are as follows: Migration amount: The migration amount of glass fiber samples is tested according to the method of GB31604.8-2021; Broken filament rate: Use a microscope to magnify and observe the sample, record the number of partial breaks and complete breaks, and calculate the broken filament rate of the glass fiber sample; Hairiness rate: Use a microscope to magnify and observe the sample, record the number of end hairiness, loops, and hair clips, and calculate the hairiness rate of the glass fiber sample; Yield rate: Visually select glass fiber yarns with uniform yarn diameter and smooth surface, without obvious defects and impurities as finished products, record their number, and calculate the yield rate of the glass fiber samples.

[0048] The test results are shown in Table 2.

[0049] Table 1 Test results of film strength and water resistance of sizing agent Group / Performance Membrane strength KPa Quality loss rate / % Example 1 226 0.43 Example 2 224 0.46 Example 3 220 0.50 Example 4 212 0.53 Example 5 215 0.51 Comparative Example 1 144 0.80 Comparative Example 2 162 0.62 Comparative Example 3 169 0.61 Comparative Example 4 160 0.65 Comparative Example 5 182 0.58 Comparative Example 6 186 0.60 Comparative Example 7 183 0.55 Comparative Example 8 191 1.72 Table 2 Product performance results of glass fiber samples Group / Performance Migration amount / % Wire breakage rate / % Hairiness rate / % Yield rate / % Example 1 1.70 0.39 0.51 96.8 Example 2 1.74 0.42 0.53 96.4 Example 3 1.77 0.45 0.55 96.1 Example 4 1.86 0.53 0.61 93.5 Example 5 1.91 0.56 0.65 93.0 Comparative Example 1 12.32 4.17 8.02 75.3 Comparative Example 2 6.64 1.57 3.53 82.0 Comparative Example 3 7.25 1.83 4.36 81.3 Comparative Example 4 6.72 1.64 4.29 81.4 Comparative Example 5 3.29 0.93 1.68 86.6 Comparative Example 6 3.20 0.88 1.61 87.3 Comparative Example 7 3.23 0.90 1.65 86.9 Comparative Example 8 2.24 0.74 1.26 90.7 It can be seen from the results of Examples 1-5 in Table 1-2 that when the mass ratio of carnauba wax and hydrogenated soybean oil in the lubricant is in the range of (1.2-1.5):1, the film strength and water resistance of the impregnating agent and the performance of the produced glass fiber yarn reach a better level.

[0050] From the results of Example 1 and Comparative Examples 1-4 in Table 1-2, it can be seen that the three components of potato oxidized hydroxypropyl starch, octenyl succinate starch ester and modified starch can synergistically improve the bonding strength between the sizing agent and the glass fiber, can coat and bond the glass fiber precursor, give the yarn stiffness, improve the yarn bundling, and reduce the hair during debonding and weaving, and reduce powder falling. This may be because the presence of octenyl succinate starch ester makes the starch-based film-forming agent well dispersed in the carnauba wax, further improving the stability and fluidity of the sizing agent.

[0051] From the results of Example 1 and Comparative Examples 5-7 in Table 1-2, it can be seen that the amount of octenyl succinate starch ester added will affect the performance of the film-forming agent, because octenyl succinate starch ester has an effect on the viscosity of the system, which may affect the fluidity of the sizing agent, thereby affecting the mechanical properties of the film. When the mass ratio of the potato oxidized hydroxypropyl starch, octenyl succinate starch ester and modified starch is within the range of 1: (1.1-1.5): (0.5-0.8), the film strength and water resistance of the sizing agent and the product performance of the glass fiber sample can achieve better results.

[0052] From the results of Example 1 and Comparative Example 8 in Table 1-2, it can be seen that carnauba wax is better than palm oil in improving the hydrophobicity and wear resistance of the wetting agent, and the combination of carnauba wax and hydrogenated soybean oil is more conducive to reducing the water resistance of starch film and improving the wear resistance of starch film.

[0053] In summary, the sizing agent of the present invention can effectively improve the wear resistance of low-twist yarn, reduce hairiness, enhance bundling and weaving properties, and can be used to prepare glass fiber textile spun yarn.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A starch-based wetting agent, characterized in that: The wetting agent includes active ingredients and water, and the mass ratio of active ingredients to water is (0.05-0.15):

1. The active ingredients include the following raw materials in parts by weight: 45-65 parts of starch-based film-forming agent, 5-10 parts of plasticizer, 15-20 parts of lubricant, 1-2.5 parts of emulsifier, 5-8 parts of coupling agent, 1-2.5 parts of softener, 0.5-1.5 parts of preservative and 0.02-0.05 parts of defoaming agent; Among them, the starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester and modified starch in a mass ratio of 1: (1.1-1.5): (0.5-0.8), the manufacturer of the modified starch is Guangdong Huimei Starch Technology Co., Ltd., and the brand is HM-318; the plasticizer is tributyl citrate; and the lubricant is a composition of carnauba wax and hydrogenated soybean oil.

2. The starch-based wetting agent according to claim 1, characterized in that The emulsifier is polyoxyethylene fatty acid ester.

3. The starch-based wetting agent according to claim 1, characterized in that The coupling agent is a silane coupling agent, the softener is aliphatic polyamide and / or ester-based quaternary ammonium salt, the preservative is sodium methyl p-hydroxybenzoate, and the defoamer is a phosphate defoamer.

4. The starch-based wetting agent according to claim 1, characterized in that The starch-based film-forming agent is a composition of potato oxidized hydroxypropyl starch, octenyl succinate starch ester and modified starch in a mass ratio of 1:1.2:0.

7.

5. The starch-based wetting agent according to claim 1, characterized in that The lubricant is a composition of carnauba wax and hydrogenated soybean oil in a mass ratio of (1.2-1.5):

1.

6. The starch-based wetting agent according to claim 1 or 5, characterized in that: The lubricant is a composition of carnauba wax and hydrogenated soybean oil in a mass ratio of 1.3:

1.

7. The method for preparing the starch-type wetting agent according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, mixing the starch-based film-forming agent in a formula amount with water, stirring evenly, heating and keeping warm, and cooling to obtain a film-forming agent solution; S2, mixing the formulated amount of plasticizer, lubricant, emulsifier, coupling agent, softener, preservative and defoamer, stirring evenly to obtain an additive solution; S3, mixing the film-forming agent solution and the auxiliary agent solution, stirring until an emulsion is formed, and obtaining the starch-based wetting agent.

8. The method for preparing the starch-type wetting agent according to claim 7, characterized in that: In step S1, the stirring speed is 200-300 rpm, the stirring time is 10-20 min, the insulation temperature is 90-100° C., and the insulation time is 20-40 min.

9. The method for preparing a starch-based wetting agent according to claim 7, characterized in that: The stirring temperature in step S2 is 60-70° C., the stirring speed is 300-500 rpm, and the stirring time is 20-40 min.

10. Use of the starch-based sizing agent according to any one of claims 1 to 6 in the preparation of glass fiber textile spun yarn.