A high-silica glass fiber sizing agent and a method for preparing the same

Abstract

The present application relates to the field of high silica glass fiber sizing agent, and particularly relates to a high silica glass fiber sizing agent and a preparation method thereof, wherein new sizing agent component raw materials are selected, and the mass percentage (wt%) of each component in the sizing agent is as follows: epoxy resin: 0.5-5.0, PAO-20: 0.5-5.0, isopropyl laurate: 0.5-2.5, S-80: 0.2-0.6, T-80: 0.2-1.2, oxidized starch: 0.2-1.5, ethylene-vinyl acetate copolymer: 0.3-2.5, citric acid: 0.1-1.5, and deionized water: 80.2-97.5. The sizing agent of the present application uses epoxy resin as a film former, PAO-20 as a plasticizer, isopropyl laurate as a lubricant, and various additives, thereby improving the wear resistance and lubrication rate of high-alkali high-silica glass fiber continuous yarn during the processes of drawing, spinning, and weaving, reducing the erosion of the atmosphere on the fiber, reducing the generation of fiber hair during the spinning process, and also improving the stability of the sizing agent emulsion under acidic conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high silica glass fiber sizing agent, in particular to a high silica glass fiber sizing agent and a preparation method thereof. BACKGROUND

[0002] High silica glass fiber products are widely used in aerospace, fireproofing and thermal insulation fields due to excellent high temperature resistance. The high-alkali component high silica glass fiber filament mainly comprises a Na2O-SiO2 binary system, the Na2O content in the filament component is 19%-22%, the SiO2 content is 78%-80%, and the AL2O3 content is 1.1-1.5%. The Na2O content in the high-alkali component high silica glass fiber filament is significantly higher than the content range of 6.5%-7.8% of the conventional high silica glass fiber filament. When the high-alkali component high silica glass is made into a glass fiber and exposed to the atmosphere, the glass surface area is sharply enlarged, the Na2O on the surface of the fiber reacts rapidly with H2O and CO2 in the atmosphere to generate alkali reaction substances such as NaOH, Na2CO3 and Na2SiO3, and the continuous accumulation of the alkali reaction products will accelerate the erosion of the glass fiber surface, resulting in an increase in the micro-cracks and structural damage of the glass fiber, a decrease in the tensile breaking strength of the fiber and an increase in the brittleness. Therefore, a special protective sizing agent must be used when preparing the high-alkali component high silica glass fiber continuous fiber to avoid excessive atmospheric erosion of the high-alkali component high silica glass fiber filament, so as to maintain the structural integrity of the high-alkali glass fiber filament within a limited time, until the Na2O component is removed by acid leaching to obtain a high silica glass fiber product with stable composition.

[0003] The components and contents (wt%) of the existing high silica glass fiber sizing agent are as follows: oxidized paraffin wax: 0.3-1.5 (film forming agent), machine oil: 0.3-1.0 (plasticizer), lithium-based grease 2#: 0.2-1.2 (lubricant), color fixing agent G: 0.8-3.5 (binder), stearic acid: 0.5-2.5 (emulsifier), peregal: 0.5-0.8 (emulsifier), and water: 85.0-96.1. Although the component ratio of the above sizing agent meets the basic requirements of the high silica glass fiber sizing agent, it has the following defects.

[0004] 1. The sizing agent emulsion has poor stability under acidic conditions, and when the pH value of the sizing agent emulsion is adjusted to ≤4.5-5.0, the emulsion is unstable and prone to emulsion breaking.

[0005] 2. After the sizing agent forms a film on the fiber surface, the binder color fixing agent G in the component has poor alkali resistance and is prone to failure under alkaline conditions, resulting in severe fuzzing during the textile process and poor mechanical processing performance.

[0006] 3. After the sizing agent is applied to the surface of high-alkali glass fiber, when the ambient temperature is 15-19℃ and the relative humidity is 50-65%RH, the retention rate of the fiber's relative tensile breaking strength decreases from the initial value to 45-55% within 10 days. In actual production, to meet the corresponding fabric specifications, production operations need to be completed within 15 calendar days when the fiber's relative tensile breaking strength retention rate is ≥45%, which is difficult to match actual production needs. When the ambient temperature is 20-28℃ and the relative humidity is 50-65%RH, the retention rate of the fiber's relative tensile breaking strength decreases from the initial value to 10-44% within 2 days. Existing sizing agents cannot effectively prevent or reduce the excessively rapid strength decay rate of high-alkali glass fiber due to atmospheric erosion. The retention rate of the fiber's relative tensile breaking strength decreases from the initial value to 10-44% within 2 days, and the effective period of the fiber strength retention rate ≥45% is far less than 15 calendar days, which cannot match actual production needs.

[0007] In view of the shortcomings of existing sizing agents, there is an urgent need to develop a high-silica glass fiber sizing agent that combines excellent emulsion stability, strong anti-corrosion ability and tensile strength. Summary of the Invention

[0008] To address the shortcomings of the existing technology, this invention provides a high-silica glass fiber sizing agent and its preparation method. The provided sizing agent can effectively improve the textile resistance and atmospheric corrosion resistance of high-alkali high-silica glass fibers.

[0009] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows.

[0010] The first aspect of this invention provides a high-silica glass fiber impregnating agent, the impregnating agent comprising a film-forming agent, a plasticizer, a lubricant, an emulsifier, an adhesive, an auxiliary adhesive, additives, and deionized water; the film-forming agent is epoxy resin, the plasticizer is PAO-20, the lubricant is isopropyl laurate, the emulsifier is S-80 and T-80, the adhesive is oxidized starch and ethylene-vinyl acetate copolymer, the auxiliary adhesive is ethylene-vinyl acetate copolymer, and the additives are citric acid.

[0011] The mass percentage (wt%) of each component in the impregnating agent is as follows: epoxy resin: 0.5-5.0, PAO-20: 0.5-5.0, isopropyl laurate: 0.5-2.5, S-80: 0.2-0.6, T-80: 0.2-1.2, oxidized starch: 0.2-1.5, ethylene-vinyl acetate copolymer: 0.3-2.5, citric acid: 0.1-1.5, deionized water: 80.2-97.5.

[0012] Further, the mass percentage (wt%) of each component in the impregnant is as follows: epoxy resin: 1.20-1.60, PAO-20: 1.20-1.60, isopropyl laurate: 1.00-1.30, S-80: 0.20-0.22, T-80: 0.40-0.42, oxidized starch: 0.40-0.80, ethylene-vinyl acetate copolymer: 0.40-0.60, citric acid: 0.40-0.80, deionized water: 92.56-94.80.

[0013] Further, the epoxy resin is of bisphenol A type or bisphenol F type and the resin is liquid at a temperature range of 0°C-80°C.

[0014] Further, the epoxy resin is of E-51, E-44, F-51 or F-48 type.

[0015] Further, the PAO-20 is polyalphaolefin-based synthetic lubricating oil.

[0016] Further, the S-80 is Span 80 and the T-80 is Tween 80.

[0017] The second aspect of the present application provides a preparation method of high-silica glass fiber impregnant, comprising the following steps.

[0018] a. The materials are added to the reaction container in the order of epoxy resin, PAO-20, isopropyl laurate, S-80 and T-80, and mixed at 70-80°C for 30-40 min by a frame rotary stirrer until the epoxy resin and other materials are completely melted and uniform, then a high-speed shearing stirrer is started, and the materials are cooled to 45-60°C and kept at this temperature.

[0019] b. The total amount of deionized water used for the finished impregnant is set to 50 parts, 1 part of 20-25°C deionized water is used to melt the oxidized starch, the melted starch slurry is heated to 40°C, and then added to the liquid obtained in step a in an average of 5 times for emulsification, and the high-speed shearing stirrer is kept at a speed of 1500-2000 rpm and the frame rotary stirrer is kept at a speed of 50-100 rpm during the process, when the viscosity of the liquid reaches 5000-12000 mpa·s and becomes a viscous paste, the water addition is stopped and the stirring is continued for 5-10 min.

[0020] c. 40 parts of 20-25°C deionized water is added to the viscous paste obtained in step b and the stirring is continued for 20 min to dilute it into a uniform emulsion.

[0021] d. The remaining 4 parts of deionized water is used to dilute the ethylene-vinyl acetate copolymer, and 5 parts of deionized water is used to dissolve the citric acid, which is then gradually added to the emulsion obtained in step c, and stirring is continued for 20-30 min to obtain the finished sizing agent.

[0022] Further, in step a, the speed of the high-speed shearing mixer is 800-2000 rpm.

[0023] Further, in step b, the emulsification time is 20-30 min.

[0024] Further, in step d, the stirring speed is 90-100 r / min.

[0025] The third aspect of the application provides the use of the above-mentioned high-silica glass fiber sizing agent in the preparation of high-alkali component high-silica glass fiber, wherein the Na2O content in the high-alkali component high-silica glass fiber is 19-22%, and when used, the sizing amount of the sizing agent accounts for 5.5-10.0 wt% of the mass of the original fiber, and the sizing speed is 550-700 m / min.

[0026] Compared with the prior art, the present application has the following beneficial effects: the sizing agent provided by the present application selects epoxy resin as the film former, PAO-20 as the plasticizer, isopropyl laurate as the lubricant, and various additives, which improves the wear resistance and lubricity of high-alkali high-silica glass fiber continuous yarn during the drawing, spinning, and weaving processes, reduces the erosion of the atmosphere on the fiber, reduces the generation of hairiness of the fiber during the weaving process, and also improves the stability of the sizing agent emulsion under acidic conditions. The specific effects of each component are as follows.

[0027] 1) The use of the new film former epoxy resin improves the stability of the emulsion in acidic and alkaline environments, the bonding force between the sizing agent film and the surface of the glass fiber is enhanced, and the wear resistance of the glass fiber during the weaving process is improved.

[0028] 2) The use of the new plasticizer PAO-20 has moderate viscosity (25℃, viscosity is 40-60 mPa.s), excellent spreading property, small viscosity change with temperature, good film forming property and flexibility, and avoids the problem of hairiness caused by brittle and hard sizing film.

[0029] 3) The use of the new lubricant isopropyl laurate has low viscosity (25℃, viscosity is 31 mPa.s), high permeability, and better lubricity, which is more suitable for high-speed air-jet looms, easy to clean, no residue, reduces the cleaning of the loom, improves the plant hand feeling and appearance neatness.

[0030] 4) The use of the compound emulsifier S-80 (span 80) and T-80 (tween 80) improves the stability of the sizing agent emulsion.

[0031] 5) Using compound adhesive: the combination of oxidized starch and ethylene-vinyl acetate copolymer significantly improves the tensile strength of glass fiber (fiber tensile strength increases by 50-85%), effectively isolates the mechanical friction of the fiber during the spinning process, and provides flexibility and bundling for the fiber tow, improving the processing advantages of the fiber in a humid environment.

[0032] 6) Adding additives such as citric acid neutralizes the basic reaction products, reducing the damage of basic substances to the adhesive in the sizing agent, thereby improving the processing performance of high-alkali high-silicon glass fiber. DETAILED DESCRIPTION

[0033] The application will be further described by examples.

[0034] Example 1

[0035] The components of the sizing agent of this example are as follows: epoxy resin: 1.20, PAO-20: 1.20, isopropyl laurate: 1.00, S-80: 0.20, T-80: 0.40, oxidized starch: 0.40, ethylene-vinyl acetate copolymer: 0.40, citric acid: 0.40, deionized water: 94.80.

[0036] The above-mentioned sizing agent has the following specific preparation steps.

[0037] 1) Mix the epoxy resin, PAO-20, isopropyl laurate, S-80 and T-80 in order at 70-80°C under frame rotation stirring for 30-40min, until the epoxy resin and other materials are completely melted and uniform, turn on the high-speed shear stirrer at 800-2000rpm, and cool the material to 45-60°C, and keep the material temperature at 45-60°C.

[0038] 2) Set the amount of deionized water used for the finished sizing agent to 50 parts, melt the oxidized starch with 1 part of 20-25°C deionized water, and heat the melted starch slurry to 40°C. Add to the material liquid continuously stirred by high-speed shear force stirrer and frame rotation stirrer in 5 equal parts, high-speed shear force stirrer speed 1500-2000rpm, frame rotation stirrer speed 50-100rpm, emulsification time 20-30min, when the viscosity of the material liquid reaches 5000-12000mpa·s, it becomes a viscous paste, stop adding water and continue stirring for 5-10min.

[0039] 3) Dilute the viscous paste with 40 parts of 20-25°C deionized water to emulsion, and continue stirring for 20min.

[0040] 4) The remaining 4 parts of deionized water is used to dilute the ethylene-vinyl acetate copolymer, 5 parts of deionized water is used to dissolve the citric acid, which is then gradually added to the above emulsion, and stirring is maintained for 20-30 min at a stirring speed of 90-100 r / min. At this point, the emulsion preparation is complete.

[0041] The above infiltration agent is applied to the high-alkali component high-silica glass fiber at a proportion of 5.5-10.0 (wt%) at a speed of 550-700 m / min, and the non-acid leaching continuous yarn after sizing is used to make non-acid leaching fabric (the fabric code "BW670-94" is the model code of high-silica glass fiber cloth in the enterprise, wherein: "B" represents high-alkali high-silica glass, "W" represents woven fabric, "670" represents the product unit area mass 670 g / m 2 , "94" represents the fabric width of 94 cm). The performance test is carried out at 22°C, and the unit strength is as shown in Table 1.

[0042] Table 1

[0043]

[0044] Example 2

[0045] The mass percentage (wt%) of the infiltration agent formula components of this example is as follows: epoxy resin: 1.30, PAO-20: 1.30, isopropyl laurate: 1.10, S-80: 0.21, T-80: 0.41, oxidized starch: 0.50, ethylene-vinyl acetate copolymer: 0.50, citric acid: 0.50, deionized water: 94.18.

[0046] The infiltration agent of the above formula is prepared according to the following specific steps.

[0047] 1) The epoxy resin, PAO-20, isopropyl laurate, S-80 and T-80 are sequentially mixed at 70-80°C under frame rotation stirring for 30-40 min until the epoxy resin and other materials are completely melted and uniform. The high-speed shearing stirrer speed is kept at 800~2000 rpm. After the material is cooled to 45-60°C, the material temperature is maintained at 45-60°C.

[0048] 2) Set the amount of deionized water used for finished product infiltration agent is 50 parts, with 1 part of 20-25 DEG C deionized water to melt the oxidized starch, the melted starch slurry temperature to 40 DEG C, divided into 5 times to join the high shear force mixer and frame rotary mixer continuous stirring liquid, high shear force mixer speed 1500-2000 rpm, frame rotary mixer speed 50-100 rpm, emulsification time is 20-30 min, when the liquid viscosity reaches 5000-12000 mpa·s becomes viscous paste, stop adding water and continue to stir 5-10 min.

[0049] 3) with 40 parts of 20-25 DEG C deionized water to dilute the paste material into emulsion, continuous stirring 20 min.

[0050] 4) with the remaining 4 parts of deionized water to dilute ethylene-vinyl acetate copolymer, 5 parts of deionized water to dissolve citric acid, then gradually added to the above emulsion, and keep stirring 20-30 min, stirring speed 90-100 r / min, thus the emulsion preparation is completed.

[0051] The above infiltration agent is applied to high alkali component high silica glass fiber at a proportion of 5.5-10.0 (wt%) at a speed of 550-700 m / min, and the unit strength of the acid leaching continuous yarn made of the acid leaching fabric after sizing is detected at 22 DEG C, as shown in the following table 2.

[0052] Table 2

[0053]

[0054] Example 3

[0055] The infiltration agent formula components of this example are as follows: epoxy resin: 1.40, PAO-20: 1.40, isopropyl laurate: 1.20, S-80: 0.22, T-80: 0.42, oxidized starch: 0.60, ethylene-vinyl acetate copolymer: 0.60, citric acid: 0.60, deionized water: 93.56.

[0056] The above formula of the infiltration agent, the specific preparation steps are as follows.

[0057] 1) in order to epoxy resin, PAO-20, isopropyl laurate, S-80 and T-80 in 70-80 DEG C frame rotary stirring mixed 30-40 min, until the epoxy resin and other materials completely melted evenly, open high speed shear mixer speed is maintained at 800~2000 rpm, the material cooling to 45-60 DEG C, and keep the material temperature at 45-60 DEG C.

[0058] 2) Set the amount of deionized water used for finished product infiltration agent is 50 parts, with 1 part of 20-25 DEG C deionized water to melt the oxidized starch, the melted starch slurry temperature to 40 DEG C, divided into 5 times to join the high shear force mixer and frame rotary mixer continuous stirring liquid, high shear force mixer speed 1500-2000 rpm, frame rotary mixer speed 50-100 rpm, emulsification time is 20-30 min, when the liquid viscosity reaches 5000-12000 mpa.s becomes viscous paste, stop adding water and continue stirring 5-10 min.

[0059] 3) with 40 parts of 20-25 DEG C deionized water to dilute the paste material into emulsion, continuous stirring 20 min.

[0060] 4) with the remaining 4 parts of deionized water to dilute ethylene-vinyl acetate copolymer, 5 parts of deionized water to dissolve citric acid, then gradually added to the above emulsion, and keep stirring 20-30 min, stirring speed 90-100 r / min, thus the emulsion preparation is completed.

[0061] The above infiltration agent is applied to high alkali component high silica glass fiber at a proportion of 5.5-10.0 (wt%) at a speed of 550-700 m / min, and the unit strength of the acid leaching continuous yarn fabric made of the acid leaching continuous yarn after sizing is detected at 22 DEG C, as shown in the following table 3.

[0062] Table 3

[0063]

[0064] Example 4

[0065] The infiltration agent formula components of this example are as follows: epoxy resin: 1.50, PAO-20: 1.50, isopropyl laurate: 1.25, S-80: 0.22, T-80: 0.42, oxidized starch: 0.70, ethylene-vinyl acetate copolymer: 0.70, citric acid: 0.70, deionized water: 93.01.

[0066] The above formula of the infiltration agent, the specific preparation steps are as follows.

[0067] 1) in order to epoxy resin, PAO-20, isopropyl laurate, S-80 and T-80 in 70-80 DEG C frame rotary stirring mixed 30-40 min, until the epoxy resin and other materials completely melted evenly, open high speed shear mixer speed is maintained at 800~2000 rpm, the material cooling to 45-60 DEG C, and keep the material temperature at 45-60 DEG C.

[0068] 2) Set the amount of deionized water used for the finished product of the infiltrating agent is 50 parts, with 1 part of 20-25 DEG C deionized water to melt the oxidized starch, the melted starch slurry is heated to 40 DEG C, 5 times in average into the high shear force mixer and frame rotary mixer continuous stirring liquid, high shear force mixer speed 1500-2000 rpm, frame rotary mixer speed 50-100 rpm, emulsification time is 20-30 min, when the liquid viscosity reaches 5000-12000 mpa.s becomes viscous paste, stop adding water and continue stirring 5-10 min.

[0069] 3) the paste material is diluted into emulsion with 40 parts of 20-25 DEG C deionized water, continuous stirring 20 min.

[0070] 4) the remaining 4 parts of deionized water to dilute ethylene-vinyl acetate copolymer, 5 parts of deionized water to dissolve citric acid, then gradually added to the above emulsion, and keep stirring 20 min-30 min, stirring speed 90-100 r / min, thus the emulsion preparation is completed.

[0071] The above-mentioned infiltrating agent is applied to high alkali component high silica glass fiber at a proportion of 5.5-10.0 (wt%) at a speed of 550-700 m / min, and the unit strength of the acid leaching continuous yarn fabric made of the acid leaching continuous yarn after sizing is detected at 22 DEG C, as shown in the following table 4.

[0072] Table 4

[0073]

[0074] Example 5

[0075] The infiltrating agent of the present embodiment has the following components: epoxy resin: 1.60, PAO-20: 1.60, isopropyl laurate: 1.30, S-80: 0.22, T-80: 0.42, oxidized starch: 0.80, ethylene-vinyl acetate copolymer: 0.80, citric acid: 0.80, deionized water: 92.56.

[0076] The above-mentioned infiltrating agent has the following specific preparation steps.

[0077] 1) the epoxy resin, PAO-20, isopropyl laurate, S-80 and T-80 are mixed in sequence at 70-80 DEG C under frame rotary stirring for 30 min-40 min, until the epoxy resin and other materials are completely melted and uniform, the high speed shear mixer is started at a speed of 800~2000 rpm, and the material is cooled to 45-60 DEG C, and the material temperature is kept at 45-60 DEG C.

[0078] 2) Set the amount of deionized water used for finished infiltration agent is 50 parts, with 1 part of 20-25 DEG C deionized water to melt the oxidized starch, the starch slurry after melting to 40 DEG C, 5 times on average into the high shear force mixer and frame rotary mixer continuous stirring liquid, high shear force mixer speed 1500-2000 rpm, frame rotary mixer speed 50-100 rpm, emulsification time is 20-30 min, when the liquid viscosity reaches 5000-12000 mpa·s becomes viscous paste, stop adding water and continue stirring 5-10 min.

[0079] 3) with 40 parts of 20-25 DEG C deionized water to dilute the paste material into emulsion, continuous stirring 20 min.

[0080] 4) with the remaining 4 parts of deionized water to dilute ethylene-vinyl acetate copolymer, 5 parts of deionized water to dissolve citric acid, then gradually added to the above emulsion, and keep stirring 20-30 min, stirring speed 90-100 r / min, thus the emulsion preparation is completed.

[0081] The above infiltration agent is applied to high alkali component high silica glass fiber at a speed of 550-700 m / min at a proportion of 5.5-10.0 (wt%), and the unit strength of the acid leaching fabric made of the acid leaching continuous yarn after sizing is detected at 22 DEG C, as shown in Table 5.

[0082] Table 5

[0083]

[0084] In order to further verify the tensile breaking strength of the infiltration agent prepared by the embodiment of the application, the high alkali component high silica glass fabric is subjected to acid leaching after further implementation of the infiltration agent obtained by the embodiment 1-5 to obtain high silica glass acid treated fabric BWS590-94 (the fabric code "BWS590-94" is the model code of high silica glass fabric in the enterprise, wherein: "B" represents high silica glass, "W" represents woven fabric, "S" represents that the woven fabric is treated by acid leaching process, "590" represents the product unit area mass 590 g / m 2 , "94" represents the fabric width is 94 cm), and the unit strength of the acid leaching fabric is detected at 22 DEG C, as shown in Table 6.

[0085] Table 6

[0086]

[0087] It should be noted that the new infiltrant prepared in the above embodiments 1-5 and the existing infiltrant, in the performance test of the non-acid leaching fabric made of the non-acid leaching continuous yarn after sizing and the acid leaching fabric, the test times are not less than three times, and the range value obtained further illustrates the stability of the test data.

[0088] From the above embodiments, it can be seen that the fabric specific strength interval value of the high-alkali component high-silica glass fiber fabric made of the existing infiltrant is lower than that of the same type fabric made of the new infiltrant, and after acid treatment, the fabric specific strength interval value of the fabric made of the existing infiltrant is still lower than that of the same type fabric made of the new infiltrant after acid treatment, so it can be seen that the selection of the raw material of the infiltrant component of the new infiltrant is a more optimal scheme; the fabric specific strength interval value of the high-silica glass fiber fabric made of the new infiltrant with the ratio scheme of embodiment 4 is greater than that of the fabric made by the ratio schemes of embodiments 1, 2, 3, and 5, so it can be seen that the ratio scheme of the infiltrant component of embodiment 4 is a more optimal scheme.

[0089] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or changes within the scope of the claims, which does not affect the essential content of the present application.

Claims

1. A high-silica glass fiber sizing, characterized by, The infiltrating agent comprises a film forming agent, a plasticizer, a lubricant, an emulsifier, a binder, an auxiliary binder, an additive and deionized water; the film forming agent is epoxy resin, the plasticizer is PAO-20, the lubricant is isopropyl laurate, the emulsifier is S-80 and T-80, the S-80 is Span 80, the T-80 is Tween 80, the binder is oxidized starch, the auxiliary binder is ethylene-vinyl acetate copolymer, and the additive is citric acid; The mass percentage (wt%) of each component in the infiltrating agent is as follows: Epoxy resin: 0.5-5.0, PAO-20: 0.5-5.0, Isopropyl laurate: 0.5-2.5, S-80 ：0.2-0.6， T-80 ：0.2-1.2， Oxidized starch: 0.2-1.5, Ethylene-vinyl acetate copolymer: 0.3-2.5, Citric acid: 0.1-1.5, Deionized water: 80.2-97.

5.

2. A high-silica glass fiber sizing according to claim 1, wherein The mass percentage (wt%) of each component in the infiltrating agent is as follows: Epoxy resin: 1.20-1.60, PAO-20: 1.20-1.60, Isopropyl laurate: 1.00-1.30, S-80 ：0.20-0.22， T-80 ：0.40-0.42， Oxidized starch: 0.40-0.80, Ethylene-vinyl acetate copolymer: 0.40-0.60, Citric acid: 0.40-0.80, Deionized water: 92.66-94.

80.

3. A high-silica glass fiber sizing according to claim 1, wherein The epoxy resin is bisphenol A or bisphenol F type and the resin is liquid at a temperature range of 0℃-80℃.

4. A high-silica glass fiber sizing according to claim 3, wherein The type of the epoxy resin is E-51, E-44, F-51 or F-48.

5. A high-silica glass fiber sizing according to claim 1, wherein The PAO-20 is poly-alpha olefin-based synthetic lubricating oil.

6. A process for the production of a high-silica glass fiber sizing agent as claimed in any one of claims 1 to 5, characterized in that, The method comprises the following steps: a. Add materials into a reaction container in the order of epoxy resin, PAO-20, isopropyl laurate, S-80 and T-80, mix at 70-80℃ for 30-40min with a frame rotary stirrer until the epoxy resin and other materials are completely melted and uniform, then start a high-speed shearing stirrer, and cool the materials to 45-60℃ and keep the temperature; b. Set the total amount of deionized water used for the finished infiltrating agent as 50 parts, melt the oxidized starch with 1 part of deionized water at 20-25℃, heat the starch slurry to 40℃, and emulsify the slurry in the material liquid obtained in step a in 5 equal portions, keep the high-speed shearing stirrer at 1500-2000rpm and the frame rotary stirrer at 50-100rpm during the process, and the emulsification time is 20-30min, when the viscosity of the material liquid reaches 5000-12000mpa·s and becomes a viscous paste, stop adding water and continue stirring for 5-10min; c. Add 40 parts of deionized water at 20-25℃ to the viscous paste obtained in step b and continue stirring for 20min to dilute it into a uniform emulsion; d. Dilute the ethylene-vinyl acetate copolymer with the remaining 4 parts of deionized water, dissolve 5 parts of citric acid in deionized water, and then gradually add them into the emulsion obtained in step c and continue stirring for 20-30min to obtain the finished infiltrating agent.

7. The production method according to claim 6, wherein In step a, the speed of the high-speed shearing stirrer is 800-2000rpm.

8. The preparation method according to claim 6, characterized in that, The emulsification time in step b is 20-30 min.

9. The preparation method according to claim 6, characterized in that, The stirring speed in step d is 90-100 r / min.

10. Use of a high-silica glass fibre sizing agent according to any one of claims 1 to 5 for the production of high-alkali component high-silica glass fibres, characterised in that, In application, the sizing amount of the infiltrating agent accounts for 5.5-10.0 wt% of the mass of the original wire, and the sizing speed is 550-700 m / min.

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