Surface treatment agent for glass fiber cloth, method for preparing the same, and use thereof

Abstract

The application belongs to the technical field of glass fiber treating agent, and discloses a surface treating agent for opening of glass fiber cloth, a preparation method and application thereof. The application uses polyester polyurethane emulsion, polyether polyurethane emulsion and epoxy emulsion as film forming agents, uses mercapto silane, epoxy silane and amino silane as coupling agents, uses ethoxy propoxy alkyl alcohol surfactant and cationic surfactant as lubricants, and optimizes the specific composition of the cationic surfactant, so that the opening performance of the glass fiber cloth can be improved, the glass fiber cloth with good yarn bundling, less hairiness, smoothness, high strength, good dispersibility, rapid and complete penetration in various matrix resins, good compatibility with different thermosetting resins, and good comprehensive performance of the glass fiber reinforced composite material can be prepared.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of glass fiber treating agent, and particularly relates to a surface treating agent for glass fiber cloth opening, a preparation method and application thereof. BACKGROUND

[0002] Glass fiber reinforced composite material has excellent characteristics such as high strength, high modulus, good formability, good insulation performance, corrosion resistance and fatigue damage. Due to the high cost performance of glass fiber, glass fiber has become the first choice for manufacturing composite materials reinforced with resin. At present, glass fiber reinforced products account for more than 90% of fiber reinforced composite materials, and are widely used in aerospace, transportation, industrial pipeline, building materials, electronics and other fields. The performance of glass fiber reinforced composite material not only depends on the performance of glass reinforcing fiber and matrix, but also depends on the strength of the interface bonding to a great extent. An effective way to improve the interface bonding capacity of resin and fiber is to perform surface treatment on the fiber surface.

[0003] In the production of glass fiber and the application of reinforced composite material, the surface treating agent of glass fiber, i.e. the sizing agent, is crucial. The sizing agent is a functional coating on the surface of glass fiber, and the use of the sizing agent directly affects the production smoothness, performance and economic benefits of glass fiber. In the glass fiber drawing process, if the sizing agent is not used on the surface of glass fiber, the abrasion will cause broken filaments and flying filaments, which will make the drawing operation impossible, and hundreds or thousands of dispersed and easily broken glass fiber filaments cannot be processed into products with qualified appearance and performance in the subsequent process. As an important chemical bridge between the matrix resin and the glass fiber interface, the sizing agent components directly participate in the interface reaction, thereby directly affecting the short-term and long-term performance required in the actual application of the composite material. The sizing agent can not only effectively change some defects and surface properties of glass fiber, lubricate the fiber surface, but also can well bundle the filaments and not easily disperse; greatly improve the processing performance in the subsequent process.

[0004] The production method of glass fiber cloth mainly obtains glass fiber cloth through warping, sizing, doubling, weaving, desizing and surface treatment. In the last processing section, the glass yarn in the form of cloth bundle needs to be opened to disperse into a flat strip structure and improve the surface flatness. A suitable surface treating agent can effectively improve the opening performance of glass fiber cloth, and the prepared glass fiber cloth has good yarn bundling, less hairiness, smoothness, high strength, good dispersibility, and good compatibility and adhesion with the matrix resin.

[0005] The patent (CN101838934A) provides a sizing agent for post-processing of glass fiber filter cloth, which is composed of sizing agent main component A and hydrophilic coupling agent dispersion component B, and the weight ratio of A:B is 100:3-4. The sizing agent main component A includes the following raw material components in percentage by weight: polytetrafluoroethylene emulsion with solid content of 60% 4-8, polyacrylate emulsion with solid content of 30% 8-12, polyvinyl alcohol aqueous solution with solid content of 8% 3-5, and benzyl silicone oil emulsion with solid content of 30% 2-4. The hydrophilic coupling agent dispersion component B includes the following raw material components in percentage by weight: silane coupling agent A-151 7-10, alcohol 7-10, and no Tween-80. The glass fiber filter cloth produced by using the above sizing agent reaches the technical indicators specified in the national standard GB / T18371-2002.

[0006] The patent (CN117486504A) discloses a high-temperature starch type sizing agent for electronic grade glass fiber yarn, which is an aqueous solution of effective components. The solid content of the sizing agent is 5.19-10.76%, and the solid mass percentage of each effective component in the total solid mass of the sizing agent is as follows: starch 3.40-7.00%; oil 1.10-2.30%; emulsifier 0.05-0.10%; pretreatment agent A 0.15-0.40%; pretreatment agent B 0.30-0.50%; antistatic agent 0.17-0.40%; and ammonia 0.02-0.06%. The starch is a mixture of high amylose corn starch, acrylamide grafted modified starch, and acetyl modified starch, and the mass ratio of the three is 1:1:1-5:2:1. The sizing agent can maintain the advantages of high-temperature system sizing agent yarn, such as high bundling and good coating, while reducing yarn stiffness, improving yarn lubricity, making D450 and D900 yarns not easy to produce loose silk during production, reducing the influence of production process fluctuations on yarn quality, significantly improving the weaving performance of yarns, and significantly reducing fabric defects.

[0007] In the prior art, a sizing agent with a specific composition is usually used to treat glass fibers to improve the bonding and sizing effect of glass fibers on specific matrix resins. However, there are various types of composite material matrix resins, and the chemical and physical properties of different types of matrix resins differ greatly. Therefore, glass fibers for specific matrix resins cannot meet the use requirements of all or most matrix resins.

[0008] Therefore, it is necessary to provide a surface treatment agent for opening glass fiber cloth, which can improve the opening performance of glass fiber cloth, and prepare glass fiber cloth with good yarn bundling, less hair, smoothness, high strength, good dispersibility, rapid and complete penetration in various matrix resins, and good bonding performance with matrix resins. SUMMARY

[0009] In order to overcome the above-mentioned deficiencies of the prior art, the present application provides a surface treatment agent for glass fiber cloth opening, a preparation method and application thereof. The present application uses polyester polyurethane emulsion, polyether polyurethane emulsion and epoxy emulsion as film forming agent, uses mercapto silane, epoxy silane and amino silane as coupling agent, uses ethoxy propoxy alkyl alcohol surfactant and cationic surfactant as lubricant, and optimizes the specific composition of the cationic surfactant, which can improve the opening performance of the glass fiber cloth, prepare the glass fiber cloth with good yarn bundling, less hairiness, flatness, high strength, good dispersibility, rapid and complete penetration in various matrix resins, and realize good compatibility with different thermosetting resins, and obtain glass fiber reinforced composite materials with good comprehensive performance.

[0010] In order to achieve the above-mentioned purpose, in a first aspect, the present application provides a surface treatment agent for glass fiber cloth opening, which comprises the following raw materials by weight fraction:

[0011]

[0012] The film forming agent is selected from at least two of polyester polyurethane emulsion, polyether polyurethane emulsion and epoxy emulsion;

[0013] The coupling agent is selected from at least one of mercapto silane, epoxy silane and amino silane;

[0014] The lubricant is selected from at least one of ethoxy propoxy alkyl alcohol surfactant and cationic surfactant.

[0015] In a preferred embodiment, the film forming agent is a mixture of polyester polyurethane emulsion, polyether polyurethane emulsion and epoxy emulsion.

[0016] In a preferred embodiment, in the mixture of polyester polyurethane emulsion, polyether polyurethane emulsion and epoxy emulsion, the mass ratio of polyester polyurethane emulsion, polyether polyurethane emulsion and epoxy emulsion is 1:0.8-1.5:1-2.

[0017] In a preferred embodiment, the epoxy emulsion is bisphenol A epoxy emulsion and / or bisphenol F epoxy emulsion.

[0018] In a preferred embodiment, the coupling agent is a mixture of mercapto silane, epoxy silane and amino silane, and the mass ratio of the three is 1:0.4-1:0.4-1.

[0019] In a preferred embodiment, the mercapto silane is γ-mercaptopropyl trimethoxysilane, the epoxy silane is γ-glycidyl ether propyl trimethoxysilane, and the amino silane is γ-aminopropyl triethoxysilane.

[0020] In a preferred embodiment, the lubricant is a mixture of ethoxypropoxy alkyl alcohol surfactant and cationic surfactant, the mass ratio of ethoxypropoxy alkyl alcohol surfactant and cationic surfactant in the mixture of ethoxypropoxy alkyl alcohol surfactant and cationic surfactant is 1:1-3; the ethoxypropoxy alkyl alcohol surfactant is selected from ethoxypropoxy alkyl alcohol and / or C12-16 alkyl polyoxyethylene polyoxypropylene ether; the cationic surfactant is selected from a mixture of quaternary ammonium salt surfactant and amide surfactant, the mass ratio of the two is 0.5-2:1.

[0021] In a preferred embodiment, the quaternary ammonium salt surfactant is selected from at least one of octadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium bromide; the amide surfactant is polyacrylamide.

[0022] In a preferred embodiment, the surface treatment agent further comprises 0-3.0% of an auxiliary agent selected from at least one of a crosslinking agent, a defoaming agent, a leveling agent, a pH adjusting agent, an antistatic auxiliary agent, a stabilizing agent.

[0023] In a preferred embodiment, the crosslinking agent comprises a melamine crosslinking agent, a polyhydroxy crosslinking agent.

[0024] The film forming agent is the main component of the sizing agent and has an important influence on the processability of glass fibers. The present application uses polyester type polyurethane emulsion, polyether type polyurethane emulsion and epoxy emulsion as the film forming agent, and simultaneously uses a coupling agent composed of mercapto silane, epoxy silane and amino silane. The system contains both saturated components and unsaturated components, and the active groups such as mercapto, epoxy and amino can react with unsaturated bonds and also can form hydrogen bonds with the polar groups on the surface of glass fibers and the like. The use of the above film forming agent and coupling agent can improve the interaction between the film forming agent and glass fibers, and also can improve the compatibility between glass fibers and different matrix resins. The use of ethoxypropoxy alkyl alcohol surfactant and cationic surfactant (ammonium salt surfactant and amide surfactant) as the lubricant can ensure that the glass fibers remain smooth during the processes of drawing and post-treatment, and reduce the friction of the yarns.

[0025] Therefore, the polyester polyurethane emulsion, the polyether polyurethane emulsion and the epoxy emulsion are used as the film forming agent, the mercapto silane, the epoxy silane and the amino silane are used as the coupling agent, the ethoxy propoxy alkyl alcohol surfactant and the cationic surfactant are used as the lubricant, the quaternary ammonium salt surfactant and the amide surfactant are used as the cationic surfactant, the glass fiber cloth can be improved in the fiber opening performance, the glass fiber cloth prepared has good yarn bundling, less hair, flat and smooth, high strength, good dispersity, can be quickly and completely soaked in various matrix resins, good compatibility with different thermosetting resins is achieved, and the glass fiber reinforced composite material with good comprehensive performance is obtained.

[0026] In the second aspect, the application provides a preparation method of the surface treatment agent for the glass fiber cloth opening, comprising the following steps:

[0027] S1: dispersing the coupling agent in 30-45% of the total amount of water, uniformly mixing to obtain a coupling agent solution;

[0028] S2: dispersing the film forming agent in the remaining water, uniformly mixing to obtain a film forming agent solution;

[0029] S3: adding the coupling agent solution into the film forming agent solution, uniformly mixing, then adding the remaining components, uniformly mixing to obtain the surface treatment agent for the glass fiber cloth opening.

[0030] In the third aspect, the application provides an application of the surface treatment agent for the glass fiber cloth opening in the production of the glass fiber cloth.

[0031] In the fourth aspect, the application provides a glass fiber cloth produced by using the surface treatment agent for the glass fiber cloth opening.

[0032] The application has the following beneficial effects:

[0033] 1、The polyester polyurethane emulsion, the polyether polyurethane emulsion and the epoxy emulsion are used as the film forming agent, the mercapto silane, the epoxy silane and the amino silane are used as the coupling agent, the ethoxy propoxy alkyl alcohol surfactant and the cationic surfactant are used as the lubricant, the quaternary ammonium salt surfactant and the amide surfactant are used as the cationic surfactant, the glass fiber cloth can be improved in the fiber opening performance, the glass fiber cloth prepared has good yarn bundling, less hair, flat and smooth, high strength, good dispersity, can be quickly and completely soaked in various matrix resins, good compatibility with different thermosetting resins is achieved, and the glass fiber reinforced composite material with good comprehensive performance is obtained.

[0034] 2、The glass fiber cloth produced by using the surface treatment agent for the glass fiber cloth opening can be quickly soaked in different thermosetting resins.

[0035] 3. The composite material prepared by the glass fiber cloth infiltrated by the surface treatment agent for opening the glass fiber cloth according to the application has good mechanical strength, water resistance and appearance. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the application, the application will be described in more detail below in combination with specific examples. The application is not limited by the following examples, and the specific implementation can be determined according to the technical solution of the application and the actual situation.

[0037] It is worth noting that the raw materials used in the application are ordinary commercially available products, and their sources are not specifically limited.

[0038] The sources of the following raw materials or equipment are exemplary:

[0039] Polyester polyurethane emulsion: Kogyo 296, purchased from Kogyo Company;

[0040] Polyether polyurethane emulsion: NEOXIL PS 0151, purchased from Evonik Company;

[0041] Epoxy emulsion: water-based epoxy resin emulsion W90 (bisphenol A epoxy), purchased from Guangzhou Qianan Chemical Co., Ltd.;

[0042] Coupling agent: γ-mercaptopropyl trimethoxysilane (KH590), γ-glycidyl ether propyl trimethoxysilane (KH560), the amino silane is γ-aminopropyl triethoxysilane (KH550), vinyl silane (A-151), commercially available;

[0043] Ethoxypropoxy alkyl alcohol surfactant: ethoxypropoxy-C8-10-fatty alcohol, model TRITON XL-80N, purchased from Shaanxi Liedu Pharmaceutical Chemical Co., Ltd.; C12-16 alkyl polyoxyethylene polyoxypropylene ether, purchased from Tesco Chemical (Hubei) Co., Ltd.;

[0044] Cationic surfactant: octadecyl trimethylammonium chloride, hexadecyl trimethylammonium bromide, commercially available; cationic polyacrylamide, purchased from Henan Haizhiquing Environmental Protection Technology Co., Ltd.

[0045] Example 1

[0046] The surface treatment agent for opening the glass fiber cloth is composed of the following raw materials by weight percentage:

[0047] Film forming agent 20 parts (polyester type polyurethane emulsion, polyether type polyurethane emulsion, epoxy emulsion, mass ratio 1:1:1); coupling agent 1 part (mass ratio of KH590, KH560 and KH550 is 1:0.5:0.5); lubricant 0.5 parts (ethoxy propoxy-C8-10-fatty alcohol 0.2 parts, octadecyl trimethyl ammonium chloride 0.1 parts, cationic polyacrylamide 0.2 parts, mass ratio of octadecyl trimethyl ammonium chloride and cationic polyacrylamide is 0.5:1); water 78.5 parts.

[0048] The preparation method steps are as follows:

[0049] S1: disperse the coupling agent in the total amount of 40% water, mix evenly, get the coupling agent solution;

[0050] S2: disperse the film forming agent in the remaining water, mix evenly, get the film forming agent solution;

[0051] S3: add the coupling agent solution to the film forming agent solution, mix evenly, then add the remaining components, mix evenly, get the surface treatment agent for glass fiber cloth opening.

[0052] Example 2

[0053] The surface treatment agent for glass fiber cloth opening is composed of the following raw materials by weight percentage:

[0054] Film forming agent 10 parts (polyester type polyurethane emulsion, polyether type polyurethane emulsion, epoxy emulsion, mass ratio 1:1.5:1.5); coupling agent 0.5 parts (mass ratio of KH590, KH560 and KH550 is 1:1:1); lubricant 0.2 parts (ethoxy propoxy-C8-10-fatty alcohol 0.05 parts, octadecyl trimethyl ammonium chloride 0.1 parts, cationic polyacrylamide 0.05 parts, mass ratio of octadecyl trimethyl ammonium chloride and cationic polyacrylamide is 2:1); water 60 parts.

[0055] The preparation method steps are as follows:

[0056] S1: disperse the coupling agent in the total amount of 30% water, mix evenly, get the coupling agent solution;

[0057] S2: disperse the film forming agent in the remaining water, mix evenly, get the film forming agent solution;

[0058] S3: add the coupling agent solution to the film forming agent solution, mix evenly, then add the remaining components, mix evenly, get the surface treatment agent for glass fiber cloth opening.

[0059] Example 3

[0060] The surface treatment agent for opening the glass fiber cloth is composed of the following raw materials by weight percentage:

[0061] Film forming agent 30 parts (polyester type polyurethane emulsion, polyether type polyurethane emulsion, epoxy emulsion, mass ratio 1:0.8:2); coupling agent 2 parts (mass ratio of KH590, KH560 and KH550 is 1:0.4:0.4); lubricant 1 part (C12-16 alkyl polyoxyethylene polyoxypropylene ether 0.5 parts, octadecyl trimethyl ammonium chloride 0.25 parts, cationic polyacrylamide 0.25 parts, mass ratio of cetyl trimethyl ammonium bromide and cationic polyacrylamide is 1:1); water 90 parts.

[0062] The preparation method steps are as follows:

[0063] S1: disperse the coupling agent in the total amount of 45% water, mix uniformly, and obtain the coupling agent solution;

[0064] S2: disperse the film forming agent in the remaining water, mix uniformly, and obtain the film forming agent solution;

[0065] S3: add the coupling agent solution to the film forming agent solution, mix uniformly, and then add the remaining components, mix uniformly, and the surface treatment agent for opening the glass fiber cloth is obtained.

[0066] Comparative Example 1

[0067] Except that the coupling agent is 1 part (mass ratio of KH590 and KH560 is 1:0.5, i.e. only using mercaptosilane and epoxy silane), the rest is the same as Example 1.

[0068] Comparative Example 2

[0069] Except that the coupling agent is 1 part (mass ratio of KH590, A-151 and KH550 is 1:0.5:0.5, i.e. using vinyl silane instead of epoxy silane), the rest is the same as Example 1.

[0070] Comparative Example 3

[0071] Except that the lubricant is 0.5 parts (ethoxylated propoxylated-C8-10-fatty alcohol 0.5 parts, i.e. the lubricant only uses ethoxylated propoxylated-C8-10-fatty alcohol), the rest is the same as Example 1.

[0072] Comparative Example 4

[0073] Except that the lubricant is 0.5 parts (octadecyl trimethyl ammonium chloride 0.17 parts, cationic polyacrylamide 0.33 parts, mass ratio of octadecyl trimethyl ammonium chloride and cationic polyacrylamide is 0.5:1), the rest is the same as Example 1.

[0074] Comparative Example 5

[0075] Example 1 except that the mass ratio of the polyester polyurethane emulsion, the polyether polyurethane emulsion, and the epoxy emulsion is 2:1:1.

[0076] Comparative Example 6

[0077] Example 1 except that the mass ratio of the polyester polyurethane emulsion, the polyether polyurethane emulsion, and the epoxy emulsion is 1:1:0.5.

[0078] Application Example 1

[0079] The surface treatment agents of the application examples 1-3 and the comparative examples 1-6 are respectively used for the production of 1200 tex glass fiber yarn, the surface treatment agent is diluted into a 10 wt% aqueous solution, and is baked at 130℃*14h with full microwave. After coating the sizing agent, the amount of the surface treatment agent is 0.15% of the weight of the glass fiber, and the glass fiber cloth 1-9 for surface treatment agent immersion production of glass fiber cloth for opening of the glass fiber cloth is obtained in turn.

[0080] The breaking strength of the glass fiber cloth 1-9 is tested according to the national standard GB / T 7690.3-2013; the soaking time of the glass fiber cloth in the epoxy resin (127), the polyurethane resin (Ko polyurethane 296), the unsaturated polyester resin (191A, Guangzhou Chaoying Chemical Co., Ltd.), and the water-based amino resin (AA-9077, Suzhou Qingtian New Material Co., Ltd.) is tested according to the target ring method; the hairiness amount is detected by a hairiness tester, and the results are shown in Table 1.

[0081] Application Example 2

[0082] The glass fiber cloths 1-9 prepared in application example 1 are respectively prepared into epoxy resin composites with the epoxy resin (127), the curing agent diamino diphenyl sulfone, and the accelerator 2-ethyl-4-methyl imidazole, wherein the mass ratio of the epoxy resin (127), the curing agent diamino diphenyl sulfone, and the accelerator 2-ethyl-4-methyl imidazole is 100:25:2, and the process is as follows: the epoxy resin, the curing agent, and the accelerator are mixed uniformly to obtain a glue solution, vacuum degassing is performed, vacuum is applied, the glue solution is injected into a mold in which the glass fiber cloth is pre-laid, until the glue completely fills the entire composite blank, heating and curing are completed, and the epoxy resin composites 1-9 are obtained in turn.

[0083] The shear strength of the epoxy resin composites 1-9, and the shear strength after boiling in water at 100℃ for 600h are tested according to the test standard ASTM D2344-2016, and the boiling retention rate is calculated; the tensile strength of the composites 1-9 is tested according to the standard ISO 527-1:2019, and the results are shown in Table 1.

[0084]

[0085] ​Table 1 Performance summary of examples, comparative examples and application examples

[0086]

[0087]

[0088] As can be seen from Table 1, the surface treatment agent for opening the glass fiber cloth prepared by the examples 1-3 of the present application can improve the opening performance of the glass fiber cloth, and the glass fiber cloth prepared therefrom has good yarn bundling, less hairiness, smoothness, high strength, good dispersibility, rapid and complete impregnation in various matrix resins, good compatibility with different thermosetting resins, and good comprehensive performance of the glass fiber reinforced composite material.

[0089] As can be seen from Table 1, the types of silane coupling agent and lubricant, and the ratio of film forming agent have great influence on the performance of the glass fiber cloth and the composite material.

[0090] Specifically, by comparing example 1 and comparative examples 1-2, it can be seen that, compared with using only mercapto silane, epoxy silane, or using mercapto silane, vinyl silane and amino silane as coupling agent, using mercapto silane, epoxy silane and amino silane as coupling agent can improve the comprehensive performance of the glass fiber cloth and improve the mechanical properties and water resistance of the composite material.

[0091] By comparing example 1 and comparative examples 3-4, it can be seen that, compared with using only the same amount of ethoxypropoxy alkyl alcohol surfactant or cationic surfactant as lubricant, using ethoxypropoxy alkyl alcohol surfactant and cationic surfactant as lubricant can improve the comprehensive performance of the glass fiber cloth and improve the mechanical properties and water resistance of the composite material.

[0092] By comparing example 1 and comparative examples 5-6, it can be seen that, the ratio of film forming agent should be within a limited range to obtain excellent comprehensive performance, especially the compatibility and impregnation of different thermosetting resins.

[0093] It should be noted that the above specific embodiments can enable those skilled in the art to more fully understand the present application, but do not limit the present application in any way. Therefore, although the present application has been described in detail with reference to the examples, those skilled in the art should understand that the present application can still be modified or equivalently replaced, in short, all technical solutions and changes that do not deviate from the spirit and scope of the present application should be covered in the protection scope of the present application.

Claims

1. A surface treatment agent for opening glass fiber cloth, characterized by, The application provides a surface treatment agent for glass fiber cloth opening, which comprises the following raw materials in parts by weight: 10-30 parts of a film forming agent; 0.1-2 parts of a coupling agent; 0.02-1 part of a lubricant; 60-90 parts of water; the film forming agent is a mixture of polyester type polyurethane emulsion, polyether type polyurethane emulsion and epoxy emulsion with a mass ratio of 1:0.8-1.5:1-2; the coupling agent is a mixture of mercapto silane, epoxy silane and amino silane with a mass ratio of 1:0.4-1:0.4-1; the lubricant is a mixture of ethoxy propoxy alkyl alcohol surfactant and cationic surfactant with a mass ratio of 1:1-3, the ethoxy propoxy alkyl alcohol surfactant is selected from ethoxy propoxy alkyl alcohol and / or C12-16 alkyl polyoxyethylene polyoxypropylene ether; the cationic surfactant is a mixture of quaternary ammonium salt surfactant and amide surfactant with a mass ratio of 0.5-2:

1.

2. The surface treatment agent according to claim 1, wherein the epoxy emulsion is bisphenol A epoxy emulsion and / or bisphenol F epoxy emulsion.

3. The surface treatment agent according to claim 1, wherein the mercapto silane is γ-mercaptopropyl trimethoxysilane, the epoxy silane is γ-glycidyl ether propyl trimethoxysilane, and the amino silane is γ-aminopropyl triethoxysilane.

4. The surface treatment agent according to claim 1, wherein the quaternary ammonium salt surfactant is at least one of octadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium chloride and hexadecyl trimethyl ammonium bromide; and the amide surfactant is polyacrylamide.

5. The surface treatment agent according to claim 1, wherein the surface treatment agent further comprises 0-3.0% of an auxiliary agent selected from at least one of crosslinking agent, defoaming agent, leveling agent, pH adjusting agent, antistatic auxiliary agent and stabilizer.

6. The surface treatment agent according to claim 5, wherein the crosslinking agent comprises melamine crosslinking agent and polyhydroxy crosslinking agent.

7. The method for producing a surface treatment agent for glass fiber cloth opening according to any one of claims 1 to 6, characterized by, comprising the following steps: S1: dispersing the coupling agent in 30-45% of the total amount of water, mixing uniformly to obtain a coupling agent solution; S2: dispersing the film forming agent in the remaining water, mixing uniformly to obtain a film forming agent solution; S3: adding the coupling agent solution into the film forming agent solution, mixing uniformly, and then adding the remaining components, mixing uniformly to obtain the surface treatment agent for glass fiber cloth opening.

8. Application of the surface treatment agent for glass fiber cloth opening according to any one of claims 1-6 in the production of glass fiber cloth.

9. Glass fiber cloth produced by impregnating the surface treatment agent for glass fiber cloth opening according to any one of claims 1-6.

Images