A glass fiber low twist yarn sizing agent and its preparation method and application

Abstract

The present invention provides a glass fiber low twist yarn sizing agent and a preparation method and application thereof. The glass fiber low twist yarn sizing agent of the present invention comprises the following components by mass content: 3-5.5% of a film former, 0.8-1.6% of a first lubricant, 0.01-0.03% of a second lubricant, 0.08-0.2% of an emulsifier, 0.3-0.8% of an auxiliary film former, 0.2-0.6% of a softener and 0.1-0.4% of an antistatic agent, and the rest is water. The glass fiber low twist yarn sizing agent of the present invention can be applied to a higher twisting speed, can improve the strength and wear resistance of a glass fiber low twist yarn with a monofilament diameter of 4-5 μm, reduces problems such as broken wire, hairiness, and warping yarn breakage rate during weaving, and improves the production efficiency of low twist yarn.

Description

Technical Field

[0001] The invention relates to the technical field of glass fibers, and in particular to a glass fiber low-twist yarn sizing agent and a preparation method and application thereof. Background Art

[0002] Twisting is an important part of the glass fiber precursor decomposition process. Twisting can cause the precursor to undergo torsional deformation. As a result, each section of the yarn rotates a certain angle in the same direction around the central axis of the yarn relative to the adjacent sections. The fibers in the precursor are therefore compressed and embraced, thereby improving the performance in the subsequent textile processing process.

[0003] The yarn is twisted to increase the cohesion between fibers, and the breaking strength and elongation at break increase accordingly, while the wrinkle resistance and wear resistance are enhanced; however, the twist cannot exceed a certain range, otherwise the textile fabric will be stiff, the folded edge will break easily, and the strength will decrease. Under the premise of meeting the strength requirements, the yarn twist is generally as small as possible, because the increase in twist will make the yarn feel harder, reduce elasticity, and increase shrinkage.

[0004] At present, most of the low-twist glass fiber yarns (0.3Z) with a monofilament diameter of 4-5 μm have problems such as low strength, poor wear resistance, and high hairiness, and thus cannot meet the production conditions of high-speed operation. At the same time, the existing sizing agents are generally suitable for lower twisting speeds (e.g., 2900-3000 rpm), and are not effective when used at higher twisting speeds (e.g., 3400-3600 rpm).

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The object of the present invention is to provide a glass fiber low-twist yarn sizing agent and a preparation method and application thereof, wherein the glass fiber low-twist yarn sizing agent can be applied to a higher twisting speed and can increase the diameter of the single filament by 4-5 μm The strength and wear resistance of the glass fiber low twist yarn are improved, which reduces the problems of broken yarn and hairiness in the weaving process and improves the production efficiency of the low twist yarn.

[0007] The invention provides a glass fiber low-twist yarn sizing agent, which comprises the following components by mass: 3-5.5% of a film former, 0.8-1.6% of a first lubricant, 0.01-0.03% of a second lubricant, 0.08-0.2% of an emulsifier, 0.3-0.8% of an auxiliary film former, 0.2-0.6% of a softener and 0.1-0.4% of an antistatic agent, and the rest is water.

[0008] In the present invention, the mass content of each component in the glass fiber low twist yarn sizing is calculated as the percentage of the solid mass of each component in the sizing to the total mass of the sizing. In particular, the glass fiber low twist yarn sizing of the present invention is specifically 4-5 μm glass fiber low twist yarn. In addition, water can be deionized water or pure water.

[0009] Furthermore, the glass fiber low-twist yarn sizing agent of the present invention comprises the following components by mass content: 3.5-5% of a film former, 0.8-1.6% of a first lubricant, 0.01-0.03% of a second lubricant, 0.1-0.2% of an emulsifier, 0.3-0.8% of an auxiliary film former, 0.2-0.6% of a softener and 0.2-0.4% of an antistatic agent, and the rest is water.

[0010] Preferably, the glass fiber low-twist yarn sizing agent of one embodiment comprises the following components in mass content: 3.5% film-forming agent, 1% first lubricant, 0.01% second lubricant, 0.1% emulsifier, 0.5% auxiliary film-forming agent, 0.6% softener, 0.3% antistatic agent, and the rest is water.

[0011] Specifically, the film-forming agent may include a first modified starch having a heating solubility of ≥95% and a second modified starch having a heating solubility of ≤35%, and the mass ratio of the first modified starch to the second modified starch may be (1-5):1, preferably (1.6-5):1; in one embodiment, the first modified starch may be 2-hydroxy-3-(trimethylamino)propyl ether starch chloride, and the second modified starch may be a polymer of starch-2-hydroxypropyl ether and chloromethyl ethylene oxide.

[0012] The first lubricant may include polyol unsaturated fatty acid ester or polyol unsaturated fatty acid ester and C 18-30 A mixture of monoalcohol saturated fatty acid esters; wherein the polyol unsaturated fatty acid ester is selected from at least one of glycerol unsaturated fatty acid esters and hydrogenated corn oil, and the polyol unsaturated fatty acid ester and C 18-30 The mass ratio of the monoalcohol saturated fatty acid ester is (1-5):1, preferably (1-3):1. In particular, the iodine value of the polyol unsaturated fatty acid ester is 52-54, and the saponification value is 190-200; C 18-30 The saponification value of the monoalcohol saturated fatty acid ester is 130-140, and the hydroxyl value is 5.0-9.0.

[0013] The second lubricant is an imidazoline type cationic surfactant, such as imidazoline type cationic surfactant 3760B; the imidazoline type cationic surfactant is purchased from Shaanxi Huiyouyouji New Materials Co., Ltd.

[0014] The emulsifier can be selected from at least one of polyoxyethylene polyoxypropylene ether and fatty acid polyoxyethylene amide; in one embodiment, the emulsifier includes polyoxyethylene polyoxypropylene ether and fatty acid polyoxyethylene amide, and the mass ratio of polyoxyethylene polyoxypropylene ether to fatty acid polyoxyethylene amide in the emulsifier is (2-4):1, preferably 3:1.

[0015] The auxiliary film-forming agent is a modified epoxy resin, such as modified epoxy resin YG11; the modified epoxy resin is purchased from Shaanxi Huiyouyouji New Materials Co., Ltd.

[0016] The softener is a cationic softener; specifically, the cationic softener may be a reaction product of a fatty acid and a polyethylene polyamine.

[0017] The antistatic agent may be selected from at least one of a cationic surfactant and a nonionic surfactant, wherein the cationic surfactant includes a quaternary ammonium salt cationic surfactant.

[0018] The present invention also provides a method for preparing the above-mentioned glass fiber low-twist yarn sizing, comprising the following steps:

[0019] S1: adding a film-forming agent to water, and gelatinizing the water at 85-100°C for 30-40 minutes under stirring to obtain a gelatinized liquid;

[0020] S2: After the first lubricant, emulsifier and softener are stirred and mixed and heated to 60-70° C., water at 70-80° C. is added for emulsification to obtain an emulsion;

[0021] S3: Add water at 20-35°C to the gelatinized liquid, wait until the temperature drops to 60-70°C, then add the emulsion, antistatic agent, auxiliary film-forming agent and second lubricant, and finally add water to adjust the solid content to 4.5-6.0% to obtain the glass fiber low-twist yarn sizing.

[0022] The present invention also provides the use of the glass fiber low-twist yarn sizing agent or the glass fiber low-twist yarn sizing agent prepared according to the preparation method in the preparation of glass fiber low-twist yarn.

[0023] The glass fiber low-twist yarn sizing agent of the present invention can be applied to a relatively high twisting speed (3400-3600 rpm), can improve the strength and wear resistance of glass fiber low-twist yarn with a single filament diameter of 4-5 μm, reduces problems such as broken wire, hairiness, warping yarn breakage rate, etc. during the weaving process, and improves the production efficiency of the low-twist yarn. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form also includes the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this description, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The raw materials used in each embodiment are as follows:

[0028] The first modified starch: a modified starch with a heating solubility of 100%, the chemical name of which is 2-hydroxy-3-(trimethylamino)propyl ether starch chloride, purchased from Nichiyo Chemical Co., Ltd.;

[0029] Second modified starch: a modified starch with a heating solubility of 18%, the chemical name of which is a polymer of starch-2-hydroxypropyl ether and chloromethyl oxirane, purchased from Nichiyo Chemical Co., Ltd.;

[0030] The first lubricant: polyol unsaturated fatty acid ester, iodine value is 52-54, saponification value is 190-200, purchased from Tianjin Gongda Textile Auxiliary Co., Ltd.; C 18-30 Monoalcohol saturated fatty acid esters, saponification value is 130-140, hydroxyl value is 5.0-9.0, purchased from Zhejiang Royal Madrid Technology Co., Ltd.;

[0031] Second lubricant: imidazoline type cationic surfactant 3760B, purchased from Shaanxi Huiyouyouji New Materials Co., Ltd.;

[0032] Emulsifier: polyoxyethylene polyoxypropylene ether, purchased from ADEKA Co., Ltd.; fatty acid polyoxyethylene amide, purchased from Yoshimura Oil Chemical Co., Ltd.;

[0033] Auxiliary film-forming agent: modified epoxy resin YG11, purchased from Shaanxi Huiyouyouji New Materials Co., Ltd.;

[0034] Softener: Cationic softener (reaction product of fatty acid and polyethylene polyamine), purchased from Dongbang Chemical (Shanghai) Co., Ltd.;

[0035] Antistatic agent: Cationic antistatic agent, purchased from Daiichi Kogyo Seiyaku Co., Ltd.; nonionic antistatic agent purchased from Matsumoto Oil & Fats Pharmaceutical Co., Ltd.

[0036] Example 1

[0037] The present embodiment provides a 4-5 μm glass fiber low twist yarn sizing agent, which is composed of the following raw materials in percentage, based on the percentage of the solid mass of each component in the sizing agent to the total mass of the sizing agent: 3.5% of a film former, 1% of a first lubricant, 0.01% of a second lubricant, 0.1% of an emulsifier, 0.5% of an auxiliary film former, 0.6% of a cationic softener, 0.3% of a cationic antistatic agent, a quaternary ammonium salt cationic surfactant, and the rest is deionized water; wherein the film former comprises a first modified starch and a second modified starch, and the mass ratio of the first modified starch to the second modified starch is 1.6:1; the first lubricant is a glycerol unsaturated fatty acid ester (iodine value 53) and C 30 A mixture of monoalcohol saturated fatty acid esters, glycerol unsaturated fatty acid esters and C 30 The mass ratio of the monoalcohol saturated fatty acid ester is 1:1; the emulsifier includes polyoxyethylene polyoxypropylene ether and fatty acid polyoxyethylene amide, and the mass ratio of polyoxyethylene polyoxypropylene ether to fatty acid polyoxyethylene amide is 3:1.

[0038] The preparation method of the glass fiber low twist yarn sizing of this embodiment is as follows:

[0039] S1: adding the first modified starch and the second modified starch to 60% of the total amount of cold deionized water and starting to stir, while heating to about 90° C. and maintaining the temperature for 40 minutes to gelatinize the starch to obtain a gelatinized liquid;

[0040] S2: Mix and stir the first lubricant, emulsifier and softener after preheating, raise the temperature to 60° C., and then add 80° C. deionized water accounting for 60% of the total amount of the first lubricant, emulsifier and softener until emulsification is completed to obtain an emulsion;

[0041] S3: Add deionized water at 20°C to the gelatinized liquid until the system temperature drops to 60°C, then add the above-mentioned emulsion, antistatic agent, auxiliary film-forming agent and second lubricant, and finally add deionized water to adjust the solid content to 6.0% to obtain a glass fiber low-twist yarn impregnation agent.

[0042] There is no restriction on the order of step S1 and step S2.

[0043] The glass fiber low-twist yarn sizing agent of this embodiment can be used for a twisting rotation speed of 3600 rpm.

[0044] Example 2

[0045] The present embodiment provides a 4-5 μm glass fiber low-twist yarn sizing agent, which is composed of the following raw materials in percentage, based on the percentage of the solid mass of each component in the sizing agent to the total mass of the sizing agent: 4% film-forming agent, 0.8% first lubricant hydrogenated corn oil, 0.03% second lubricant, 0.14% emulsifier fatty acid polyoxyethylene amide, 0.3% auxiliary film-forming agent, 0.3% cationic softener, 0.2% antistatic agent nonionic surfactant, and the rest is pure water; wherein the film-forming agent includes a first modified starch and a second modified starch, and the mass ratio of the first modified starch to the second modified starch is 3:1.

[0046] The preparation method of the glass fiber low twist yarn sizing of this embodiment is as follows:

[0047] S1: adding the first modified starch and the second modified starch to 55% of the total amount of cold pure water and starting to stir, while heating to 90°C and maintaining the temperature for 35 minutes to gelatinize the starch to obtain a gelatinized liquid;

[0048] S2: Mixing and stirring the first lubricant, emulsifier and softener after preheating, raising the temperature to 70° C., and then adding 70° C. pure water accounting for 55% of the total amount of the first lubricant, emulsifier and softener until emulsification is completed to obtain an emulsion;

[0049] S3: Add pure water at 30°C to the gelatinized liquid after gelatinization until the system temperature drops to 65°C, then add the above-mentioned emulsion, antistatic agent, auxiliary film-forming agent and second lubricant, and finally add pure water to adjust the solid content to 5.0% to obtain the glass fiber low-twist yarn impregnation agent.

[0050] There is no restriction on the order of step S1 and step S2.

[0051] The glass fiber low-twist yarn sizing agent of this embodiment can be used for the twisting rotation speed of 3500 rpm.

[0052] Example 3

[0053] The present embodiment provides a 4-5 μm glass fiber low twist yarn sizing agent, which is composed of the following raw materials in percentage, based on the percentage of the solid mass of each component in the sizing agent to the total mass of the sizing agent: 5% film-forming agent, 1.6% first lubricant, 0.02% second lubricant, 0.2% emulsifier fatty acid polyoxyethylene amide, 0.8% auxiliary film-forming agent, 0.2% cationic softener, 0.4% antistatic agent nonionic surfactant, and the rest is pure water; wherein the film-forming agent includes a first modified starch and a second modified starch, and the mass ratio of the first modified starch to the second modified starch is 5:1; the first lubricant is glycerol unsaturated fatty acid ester and C 18-30 A mixture of monoalcohol saturated fatty acid esters, glycerol unsaturated fatty acid esters and C 18-30The mass ratio of monoalcohol saturated fatty acid ester is 3:1.

[0054] The preparation method of the glass fiber low twist yarn sizing of this embodiment is as follows:

[0055] S1: adding the first modified starch and the second modified starch to 50% of the total amount of cold pure water and starting to stir, while heating to 85°C and maintaining the temperature for 30 minutes to gelatinize the starch to obtain a gelatinized liquid;

[0056] S2: Mixing and stirring the first lubricant, emulsifier and softener after preheating, raising the temperature to 65° C., and then adding 75° C. pure water accounting for 50% of the total amount of the first lubricant, emulsifier and softener until emulsification is completed to obtain an emulsion;

[0057] S3: Add pure water at 35°C to the gelatinized liquid after gelatinization until the system temperature drops to 70°C, then add the above-mentioned emulsion, antistatic agent, auxiliary film-forming agent and second lubricant, and finally add pure water to adjust the solid content to 4.5% to obtain the glass fiber low-twist yarn impregnation agent.

[0058] There is no restriction on the order of step S1 and step S2.

[0059] The glass fiber low-twist yarn sizing agent of this embodiment can be used for a twisting rotation speed of 3400 rpm.

[0060] Comparative Example 1

[0061] The process is basically the same as that of Example 1 except that the second lubricant is not used and the mass content of the first lubricant is 1.01%.

[0062] Comparative Example 2

[0063] The method is substantially the same as that of Example 1 except that a long-chain quaternary ammonium salt surfactant (amine value 103, acid value 70; purchased from Tianjin Gongda Textile Auxiliary Agent Co., Ltd.) is used to replace the second lubricant of Example 1.

[0064] Comparative Example 3

[0065] The process is basically the same as Example 2 except that no auxiliary film-forming agent is used and the total amount of film-forming agent is 4.3%.

[0066] Comparative Example 4

[0067] Except for using imported water-soluble low molecular weight epoxy resin (P-70) to replace the auxiliary film-forming agent in Example 1, the rest is basically the same as Example 1.

[0068] Comparative Example 5

[0069] The glass fiber low twist yarn sizing of this comparative example is composed of the following raw materials in percentage, based on the percentage of the solid mass of each component in the sizing to the total mass of the sizing: modified starch A 1.6%, modified starch B 2.4%, oil A 0.75%, oil B 0.25%, emulsifier 0.2%, cationic softener 0.5%, antistatic agent 0.3%, modified epoxy resin 0.6%, preservative 0.05%, and the rest is pure water; wherein, modified rice starch A is a modified nonionic rice starch with a particle size of 2-7 μm and a solubility of ≤30%, modified rice starch B is a modified cationic rice starch with a solubility of ≥90%, oil A is a polyol ester, and oil B is C 18-30 Fatty acid ester, modified epoxy resin is amine modified epoxy resin.

[0070] The sizing agent twisting speed of this comparative example is suitable for 2900-3000 rpm.

[0071] Test Example 1

[0072] The effect of the glass fiber low twist yarn sizing agent of each embodiment and control example was evaluated; wherein the twisting speed of embodiment 1 was 3600 rpm, the twisting speed of embodiment 2 was 3500 rpm, and the twisting speed of embodiment 3 and control examples 1-5 was 3400 rpm), and the evaluation method was as follows:

[0073] The hairiness of the yarn is tested within 0.3 mm. 0-5 hairiness is counted as "√", 6-10 as " / ", and more than 11 as "×";

[0074] Test the abrasion resistance of the yarn. If the abrasion resistance is 16-20 times, it will be marked as “√”; if the abrasion resistance is 11-15 times, it will be marked as “ / ”; and if the abrasion resistance is less than 10 times, it will be marked as “×”.

[0075] The yarn breakage rate of warping is tested. The number of broken yarns “0-1” is counted as “√”, “2-3” is counted as “ / ”, and more than 3 is counted as “×”.

[0076] The results are shown in Table 1.

[0077] Table 1 Evaluation results of the use of various glass fiber low twist yarn sizing agents

[0078]

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A glass fiber low twist yarn sizing agent, characterized in that: The invention is composed of the following components by mass content: 3.5% of film former, 1% of first lubricant, 0.01% of second lubricant, 0.1% of emulsifier, 0.5% of auxiliary film former, 0.6% of softener and 0.3% of antistatic agent, and the rest is water; wherein the film former comprises a first modified starch and a second modified starch, the first modified starch is 2-hydroxy-3-(trimethylamino)propyl ether starch chloride, the second modified starch is a polymer of starch-2-hydroxypropyl ether and chloromethyl oxirane, and the mass ratio of the first modified starch to the second modified starch is 1.6:1; the first lubricant is glycerol unsaturated fatty acid ester and C 30 A mixture of monoalcohol saturated fatty acid esters, glycerol unsaturated fatty acid esters and C 30 The mass ratio of monoalcohol saturated fatty acid ester is 1:1; the second lubricant is imidazoline type cationic surfactant 3760B; the auxiliary film-forming agent is modified epoxy resin YG11; the cationic antistatic agent is a quaternary ammonium salt cationic surfactant; the emulsifier includes polyoxyethylene polyoxypropylene ether and fatty acid polyoxyethylene amide, and the mass ratio of polyoxyethylene polyoxypropylene ether to fatty acid polyoxyethylene amide is 3:1; the softener is a cationic softener.

2. The method for preparing the glass fiber low-twist yarn sizing according to claim 1, characterized in that: The steps include: S1: adding a film-forming agent to water, and gelatinizing the water at 85-100°C for 30-40 minutes under stirring to obtain a gelatinized liquid; S2: After the first lubricant, emulsifier and softener are stirred and mixed and heated to 60-70° C., water at 70-80° C. is added for emulsification to obtain an emulsion; S3: Add water at 20-35°C to the gelatinized liquid, wait until the temperature drops to 60-70°C, then add the emulsion, antistatic agent, auxiliary film-forming agent and second lubricant, and finally add water to adjust the solid content to 4.5-6.0% to obtain the glass fiber low-twist yarn sizing.

3. Use of the glass fiber low-twist yarn sizing according to claim 1 or the glass fiber low-twist yarn sizing prepared according to the preparation method according to claim 2 in the preparation of glass fiber low-twist yarn.

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