Glass fiber sizing composition, glass fiber sizing, and method for producing the same, glass fiber, and use thereof

Abstract

The present application provides a glass fiber sizing composition, a glass fiber sizing and its preparation method, a glass fiber and its application. The glass fiber sizing composition comprises 92.5-94.5% of water and 5.5-7.5% of other components by weight percentage, wherein the other components comprise 6-12 parts of a coupling agent, 57-87 parts of a film forming agent, 2-8 parts of a lubricant, 2-10 parts of a softener and 1-5 parts of a surfactant by weight fraction. The glass fiber sizing formed by mixing the above glass fiber sizing composition is applied to the production of glass fiber, so that the glass fiber has good process smoothness and glass steel mechanical properties, and is particularly suitable for the operation requirements of user mechanical automatic yarn feeding process and batch continuous production, thereby the efficiency of user production and operation can be significantly improved, and the operation strength of workers can be reduced.

Description

Technical Field

[0001] This invention relates to the field of glass fiber sizing agent technology, and more specifically, to a glass fiber sizing agent composition, a glass fiber sizing agent and its preparation method, glass fiber and its applications. Background Technology

[0002] Glass fiber is widely used in chemical, petrochemical, pharmaceutical, metallurgical, machinery, mining, power, aerospace, transportation, agriculture, civil, and military industries. The sizing agent, which imparts special properties to glass fiber, plays a crucial role in these applications. During the glass fiber forming process, the sizing agent ensures smooth fiber drawing, lubricates and protects the glass filaments, and improves the processing technology of the glass fiber and matrix resin, thereby greatly enhancing their interfacial compatibility and maximizing the material's physical and mechanical properties.

[0003] However, existing glass fiber sizing agent formulation technologies primarily focus on matching downstream users' resin processes and the mechanical strength of end products. The technology emphasizes performance requirements in the application field, with relatively little research on the smoothness of user processes. Problems with yarn usage can lead to a series of secondary issues such as downtime, product defects, and equipment damage. According to feedback from downstream glass fiber users over the years, the proportion of problems with fiber optic usage is generally 1.5% to 5%. This proportion can be addressed in lower-end, labor-intensive composite material companies by increasing yarn cleaning frequency and using manual splicing. However, with the expansion of the glass fiber market and rising labor costs, the use of robots in the glass fiber composite material industry is increasing year by year, and unmanned workshops and even unmanned factories are gradually emerging. This has led to users having increasingly lower tolerance for problems such as uncoiling, knotting, and lifting that seriously affect machine production efficiency, making the importance of glass fiber process smoothness increasingly prominent. Therefore, designing a glass fiber sizing agent with high process smoothness is of great significance for improving the quality of glass fiber products, increasing the production efficiency of downstream users, solving industry pain points, and reducing the labor intensity of workers. Summary of the Invention

[0004] The main objective of this invention is to provide a glass fiber sizing agent composition, a glass fiber sizing agent and its preparation method, glass fiber and its application, so as to solve the problem of unsmooth use of glass fiber in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a glass fiber sizing agent composition is provided, comprising, by weight percentage, 92.5% to 94.5% water and 5.5% to 7.5% other components, wherein, by weight, the other components include 6 to 12 parts of a coupling agent, 57 to 87 parts of a film-forming agent, 2 to 8 parts of a lubricant, 2 to 10 parts of a softener, and 1 to 5 parts of a surfactant.

[0006] Further, the content of the above-mentioned softener is 3 to 7 parts, preferably 4 to 6 parts; and / or the softener is an organosilicon softener, preferably an epoxy-modified organosilicon softener, and more preferably an epoxy-modified organosilicon softener is DY-E701 with polymethylsiloxane as the main chain and / or HA-920 with active hydroxyl groups at the end.

[0007] Further, the content of the above coupling agent is 7 to 11 parts, preferably 8 to 10 parts; and / or the coupling agent is a mixture of acryloyloxysilane and diaminosilane; preferably the mass ratio of acryloyloxysilane to diaminosilane is 2 to 3:1, preferably 2.6 to 2.8:1.

[0008] Further, the content of the above-mentioned film-forming agent is 62-77 parts, preferably 67-72 parts; and / or the film-forming agent is a waterborne polyurethane resin; preferably the waterborne polyurethane resin has a molecular weight of 500-800, preferably the waterborne polyurethane resin is nonionic waterborne polyurethane resin AH-1704-1 and / or cationic waterborne polyurethane resin AH-1730; and / or the content of the lubricant is 3-6 parts, preferably 4-6 parts; and / or the lubricant is a polyethylene glycol lubricant, preferably the polyethylene glycol lubricant is selected from any one or more of PEG600, PEG1000, and PEG1500.

[0009] Further, the content of the above-mentioned surfactant is 2 to 4 parts, preferably 3 to 4 parts; and / or the surfactant is a cationic surfactant, preferably a quaternary ammonium salt cationic surfactant, and more preferably a trimethyldodecyl ammonium chloride and / or trimethyldodecyl ammonium bromide cationic surfactant.

[0010] Furthermore, the glass fiber sizing agent composition further includes 1 to 5 parts of a pH adjuster, preferably 2 to 5 parts, more preferably 3 to 4 parts; and / or the pH adjuster is selected from any one or more of acetic acid, formic acid, and citric acid; and / or the glass fiber sizing agent composition further includes 1 to 3 parts of an anti-yellowing agent, preferably an anti-yellowing agent of spandex type, and more preferably an anti-yellowing agent of hydrazide type HN-150 and / or aminourea type HN-130.

[0011] According to another aspect of the present invention, a method for preparing a glass fiber sizing agent is provided, the method comprising mixing a glass fiber sizing agent composition to obtain a glass fiber sizing agent, wherein the glass fiber sizing agent composition is the aforementioned glass fiber sizing agent composition.

[0012] According to another aspect of the present invention, a glass fiber sizing agent is provided, which is prepared by the aforementioned preparation method, preferably having a pH value of 5 to 6.

[0013] According to another aspect of the invention, a glass fiber is provided, the surface of which is coated with a glass fiber sizing agent coating, the glass fiber sizing agent coating being formed from the aforementioned glass fiber sizing agent.

[0014] According to another aspect of the present invention, there is provided the use of a glass fiber sizing agent in the preparation of alkali-free glass fiber direct yarn, wherein the glass fiber sizing agent is the aforementioned glass fiber sizing agent.

[0015] Applying the technical solution of this application, the coupling agent acts as a "bridge" between glass fiber and resin, and is a key factor determining the strength of glass fiber and fiberglass products. The film-forming agent not only determines the softness, abrasion resistance, and dispersibility of glass fiber during the drawing process, but also affects the smoothness of subsequent glass fiber processing. Lubricant is an essential component of glass fiber sizing agents, primarily to ensure the smoothness of glass fiber during drawing, increase abrasion resistance, reduce the probability of fuzz formation during subsequent use, and improve the overall smoothness of the application process. The addition of softeners helps to fundamentally improve the smoothness, softness, and film-forming properties of glass fiber. The addition of surfactants helps to increase the stability of the sizing agent emulsion, thereby improving the uniformity of the glass fiber sizing agent coating. Preferably controlling the weight proportions of coupling agents, film-forming agents, lubricants, softeners, and surfactants in other components within the aforementioned range helps to fully leverage the synergistic effects of each component in the glass fiber sizing agent composition, further improving the overall performance of the glass fiber sizing agent. Applying the glass fiber sizing agent prepared by mixing the above-mentioned glass fiber sizing agent composition to the production of glass fibers results in glass fibers with good process smoothness and fiberglass mechanical properties, making it particularly suitable for users' automated yarn loading processes and batch continuous production requirements. This can significantly improve the efficiency of users' production and operation and reduce the labor intensity of workers. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the embodiments.

[0017] As analyzed in the background section of this application, there is a problem with the smooth use of glass fiber in the prior art. In order to solve this problem, this application provides a glass fiber sizing agent composition, a glass fiber sizing agent and its preparation method, glass fiber and its application.

[0018] In a typical embodiment of this application, a glass fiber sizing agent composition is provided, comprising, by weight percentage, 92.5% to 94.5% water and 5.5% to 7.5% other components, wherein, by weight parts, the other components include 6 to 12 parts of coupling agent, 57 to 87 parts of film-forming agent, 2 to 8 parts of lubricant, 2 to 10 parts of softener, and 1 to 5 parts of surfactant.

[0019] The coupling agent in this application acts as a "bridge" between glass fiber and resin, and is a key factor determining the strength of glass fiber and fiberglass products. Film-forming agents not only determine the softness, abrasion resistance, and dispersibility of glass fiber during the drawing process, but also affect the smoothness of subsequent glass fiber processing. Lubricants are essential components of glass fiber sizing agents, primarily to ensure the smoothness of glass fiber during drawing, increase abrasion resistance, reduce the probability of fuzzing during subsequent use, and improve the overall smoothness of the application process. The addition of softeners helps to fundamentally improve the smoothness, softness, and film-forming properties of glass fiber. The addition of surfactants helps to increase the stability of the sizing agent emulsion, thereby improving the uniformity of the glass fiber sizing agent coating. Preferably controlling the weight proportions of coupling agents, film-forming agents, lubricants, softeners, and surfactants in other components within the aforementioned range helps to fully leverage the synergistic effects of each component in the glass fiber sizing agent composition, further improving the overall performance of the glass fiber sizing agent. Applying the glass fiber sizing agent prepared by mixing the above-mentioned glass fiber sizing agent composition to the production of glass fibers results in glass fibers with good process smoothness and fiberglass mechanical properties, making it particularly suitable for users' automated yarn loading processes and batch continuous production requirements. This can significantly improve the efficiency of users' production and operation and reduce the labor intensity of workers.

[0020] In one embodiment of this application, the content of the above-mentioned softener is 3 to 7 parts, preferably 4 to 6 parts; and / or the softener is an organosilicon softener, preferably an epoxy-modified organosilicon softener, and more preferably an epoxy-modified organosilicon softener is DY-E701 with polymethylsiloxane as the main chain and / or HA-920 with active hydroxyl groups at the end.

[0021] Preferably controlling the content of the softener within the above range helps to further improve the smoothness, softness and film-forming properties of the glass fiber; preferably, the softener is an epoxy-modified organosilicon softener, which introduces epoxy groups into the organosilicon molecule, which helps it react with other hydrophilic groups in the glass fiber sizing agent, thereby helping to improve the hydrophilicity of the softener itself, and thus making it more uniformly dispersed in the sizing agent emulsion.

[0022] In one embodiment of this application, the content of the coupling agent is 7 to 11 parts, preferably 8 to 10 parts; and / or the coupling agent is a mixture of acryloyloxysilane and diaminosilane; preferably the mass ratio of acryloyloxysilane to diaminosilane is 2 to 3:1, preferably 2.6 to 2.8:1.

[0023] Preferably controlling the coupling agent content within the aforementioned range helps to further improve the strength of glass fibers, thereby increasing the strength of fiberglass products. Specifically, the R groups on the silane coupling agent mainly combine with the functional groups on the matrix resin, while the silanol groups interact with the hydroxyl groups on the glass fibers, thus improving the interfacial interaction between the glass fibers and the resin. This application introduces a diaminosilane coupling agent, which, compared to traditional monoaminosilane coupling agents, adds an extra amino group to the carbon chain, resulting in lower surface tension in its hydrolysate. This allows it to spread more easily on the fiber surface during glass fiber drawing, better penetrating and covering the fine defects of the glass fibers, thereby reducing fraying and breakage, and ultimately improving the smoothness of glass fiber use. Acryloyloxysilane coupling agents are currently one of the most mature and widely used coupling agents in the glass fiber production industry, suitable for various resin types such as unsaturated polyester resin, polyurethane resin, and polyethylene resin. Therefore, this application preferably uses a mixture of acryloyloxysilane coupling agents and diaminosilane coupling agents. Furthermore, since an excessively high mass ratio of acryloyloxysilane to diaminosilane is detrimental to improving the processing performance of glass fibers, and an excessively low mass ratio is detrimental to maintaining the acid-base balance of the glass fiber sizing agent, it is preferable to control the mass ratio of acryloyloxysilane to diaminosilane within the above-mentioned range to fully leverage the synergistic effect between acryloyloxysilane and diaminosilane.

[0024] In one embodiment of this application, the content of the film-forming agent is 62-77 parts, preferably 67-72 parts; and / or the film-forming agent is an aqueous polyurethane resin; preferably, the molecular weight of the aqueous polyurethane resin is 500-800, and preferably the aqueous polyurethane resin is nonionic aqueous polyurethane resin AH-1704-1 and / or cationic aqueous polyurethane resin AH-1730; and / or the content of the lubricant is 3-6 parts, preferably 4-6 parts; and / or the lubricant is a polyethylene glycol lubricant, preferably the polyethylene glycol lubricant is selected from any one or more of PEG600, PEG1000, and PEG1500.

[0025] Preferably controlling the content of the film-forming agent within the aforementioned range helps improve the integrity, bundle properties, softness, dispersibility, and process smoothness of glass fiber drawing. It also ensures the compatibility between the glass fiber and the matrix resin, as well as the mechanical properties of the resulting composite material. Preferably, the film-forming agent is a waterborne polyurethane resin emulsion. Waterborne polyurethane resin exhibits good film-forming toughness, smoothness, good yarn bundle properties, and high strength retention. Simultaneously, polyurethane itself has strong polarity, high strength, good bonding with the matrix resin, and excellent reinforcing effect. Using waterborne polyurethane as the main film-forming agent helps improve the bundle properties, abrasion resistance, and unwinding smoothness of the glass fiber yarn. Furthermore, excessively small molecular weight of waterborne polyurethane is detrimental to improving the toughness of the glass fiber, while excessively large molecular weight is detrimental to improving the stability of the glass fiber sizing agent. Preferably controlling the molecular weight of the waterborne polyurethane resin within the aforementioned range helps to balance the strength and stability of the glass fiber sizing agent, resulting in smoother yarn and imparting excellent bundle properties and unwinding smoothness to the glass fiber yarn. Insufficient lubricant dosage is detrimental to improving the continuity of glass fiber drawing operations and the smoothness of subsequent use, while excessive lubricant dosage is detrimental to improving yarn dispersion. Preferably, controlling the lubricant content within the above-mentioned range helps to improve the smoothness, wear resistance, and usability of glass fiber during the drawing process and during use. Furthermore, it is preferable to control the lubricant to be a polyethylene glycol-based lubricant. Polyethylene glycol has good lubricity and moisturizing properties, and its excellent water solubility makes it compatible with the water-based polyurethane film-forming agent in the formulation, thereby helping to reduce the foaming of the glass fiber impregnating agent.

[0026] To further improve the stability of the glass fiber impregnating agent, in one embodiment of this application, the content of the above-mentioned surfactant is preferably controlled to be 2 to 4 parts, more preferably 3 to 4 parts; and / or the surfactant is a cationic surfactant, preferably a quaternary ammonium salt cationic surfactant, preferably trimethyldodecyl ammonium chloride and / or trimethyldodecyl ammonium bromide.

[0027] In one embodiment of this application, the glass fiber sizing agent composition further includes 1 to 5 parts of a pH adjuster, preferably 2 to 5 parts, more preferably 3 to 4 parts; and / or the pH adjuster is selected from any one or more of acetic acid, formic acid, and citric acid; and / or the glass fiber sizing agent composition further includes 1 to 3 parts of an anti-yellowing agent, preferably an anti-yellowing agent of spandex type, preferably an acylhydrazine type HN-150 and / or an aminourea type HN-130.

[0028] The addition of a pH adjuster helps promote the hydrolysis of the coupling agent and adjust the overall pH value of the glass fiber impregnating agent. Preferably, controlling the weight percentage and type of the pH adjuster within the aforementioned range helps to better promote the hydrolysis of the coupling agent. The introduction of an anti-yellowing agent helps solve the problem of yellowing of the nitrogen-containing components in the impregnating agent at high temperatures during glass fiber drying, which causes yellow streaks in the yarn. Preferably, controlling the weight percentage and type of the anti-yellowing agent within the aforementioned range helps to reduce the probability of yellow streaks while saving costs.

[0029] In another typical embodiment of this application, a method for preparing a glass fiber sizing agent is provided. The method includes mixing a glass fiber sizing agent composition to obtain a glass fiber sizing agent, wherein the glass fiber sizing agent composition is the aforementioned glass fiber sizing agent composition.

[0030] A glass fiber sizing agent with excellent comprehensive performance can be obtained by simply mixing the glass fiber sizing agent composition. To further improve the effect and efficiency of preparing the glass fiber sizing agent, the preferred preparation method of the glass fiber sizing agent is as follows:

[0031] (1) Add water to the container to make up 30% to 40% of the total mass of the wetting agent, then add the pH adjuster and silane coupling agent in sequence, and stir until the solution is clear; (2) Dissolve and dilute the film-forming agent, lubricant and softener in water and add them to the container; (3) Dilute the surfactant with hot water at 40 to 50°C and add it to the container; (4) Dissolve and dilute the anti-yellowing agent in water and add it to the container; (5) Add the remaining water to the container and stir evenly to obtain the glass fiber wetting agent.

[0032] In another typical embodiment of this application, a glass fiber sizing agent is provided, which is prepared by the aforementioned preparation method, preferably having a pH value of 5 to 6.

[0033] Applying the glass fiber sizing agent of this application to the production of glass fibers results in glass fibers with excellent process smoothness and fiberglass mechanical properties. This makes it particularly suitable for users' automated yarn loading processes and batch continuous production requirements, thereby significantly improving the efficiency of user production and reducing the intensity of worker operations. Preferably, controlling the pH value of the glass fiber sizing agent within the above-mentioned range helps to improve the stability of the glass fiber sizing agent.

[0034] In another typical embodiment of this application, a glass fiber is provided, the surface of which is coated with a glass fiber sizing agent coating, which is formed by molding the aforementioned glass fiber sizing agent.

[0035] Glass fiber yarn produced using the glass fiber sizing agent of this application is smooth, has good bundle properties, and excellent unwinding properties. It has good processability and fiberglass mechanical properties, making it suitable for users' automated yarn loading processes and batch continuous production operations.

[0036] In another typical embodiment of this application, an application of a glass fiber sizing agent in the preparation of alkali-free glass fiber direct yarn is provided, wherein the glass fiber sizing agent is the aforementioned glass fiber sizing agent.

[0037] Using glass fibers coated with the glass fiber sizing agent of this application to manufacture alkali-free glass fiber direct yarn helps to improve the production efficiency of alkali-free glass fiber direct yarn.

[0038] The beneficial effects of this application will be further illustrated below with reference to the embodiments.

[0039] Examples 1-9

[0040] The preparation method of this glass fiber impregnating agent includes the following steps:

[0041] (1) Add water equal to 30% of the total mass of the wetting agent to the container, then add the pH adjuster and coupling agent in sequence, and stir until the solution is clear;

[0042] (2) Dilute the film-forming agent with water and add it to the container, wherein the mass of water is twice the mass of the film-forming agent;

[0043] (3) Dilute the lubricant with water and add it to the container, wherein the mass of water is twice the mass of the lubricant;

[0044] (4) Dilute the fabric softener with water and add it to the container, wherein the mass of water is twice the mass of the fabric softener;

[0045] (5) Dilute the surfactant with warm water at 50°C and add it to the container, wherein the mass of water is twice the mass of the surfactant;

[0046] (6) Dissolve and dilute the anti-yellowing agent in water and add it to the container, wherein the mass of water is twice the mass of the anti-yellowing agent;

[0047] (7) Add the remaining water to the container and stir well to obtain the glass fiber sizing agent. The water mass fraction in the glass fiber sizing agent is 94%.

[0048] Table 1 shows the proportion of each component in the other components, and the specific components are as follows:

[0049] Acryloyloxysilane coupling agent (KH-570 (Jiangsu Chenguang));

[0050] Diaminosilane coupling agent (KH-792 (Nanjing Pinning));

[0051] Film-forming agent (AH-1730 (Anhui Anda Huatai));

[0052] Lubricant (PEG-1000 (Jiangsu Haian));

[0053] Fabric softener (HA-920 (Jiangsu Haian));

[0054] Surfactant (trimethyldodecylammonium chloride);

[0055] Anti-yellowing agent (HN-130 (Qingdao Jiedejia));

[0056] pH adjuster (acetic acid);

[0057] Table 1

[0058]

[0059] Example 10

[0060] The difference from Example 1 is that the information of other components is as follows: 4.0 parts of acryloyloxysilane coupling agent (A-174 (Momentive)); 2.0 parts of bis(amino)silane coupling agent (Z-6020 (Dow));

[0061] Film-forming agent (AH-1704-1 (Anhui Anda Huatai)) 87.0 parts;

[0062] Lubricant (PEG-1500 (Jiangsu Haian)) 2.0 parts;

[0063] Fabric softener (DY-E701 (Shandong Dayi)) 2.0 parts;

[0064] Surfactant (trimethyldodecylammonium bromide) 1.0 part;

[0065] Anti-yellowing agent (HN-150 (Qingdao Jiedejia)) 1.0 part;

[0066] pH adjuster (formic acid) 1.0 part;

[0067] The final product is a glass fiber impregnating agent.

[0068] Example 11

[0069] The difference from Example 1 is that the diaminosilane coupling agent (KH-792 (Nanjing Pinning)) is replaced with an aminosilane coupling agent (A-1100 (Shanghai McLean)) to finally obtain a glass fiber impregnating agent.

[0070] Example 12

[0071] The difference from Example 1 is that the mass ratio of acryloyloxysilane coupling agent (KH-570 (Jiangsu Chenguang)) to diaminosilane coupling agent (KH-792 (Nanjing Pinning)) is 3:1, and the final glass fiber impregnating agent is obtained.

[0072] Example 13

[0073] The difference from Example 1 is that the mass ratio of acryloyloxysilane coupling agent (KH-570 (Jiangsu Chenguang)) to bisaminosilane coupling agent (KH-792 (Nanjing Pinning)) is 2.6:1, and the final glass fiber impregnating agent is obtained.

[0074] Example 14

[0075] The difference from Example 1 is that the mass ratio of acryloyloxysilane coupling agent (KH-570 (Jiangsu Chenguang)) to bisaminosilane coupling agent (KH-792 (Nanjing Pinning)) is 2.8:1, and the final glass fiber impregnating agent is obtained.

[0076] Example 15

[0077] The difference from Example 1 is that the film-forming agent is AH-1730 with a molecular weight of 500, and the final product is a glass fiber impregnating agent.

[0078] Example 16

[0079] The difference from Example 1 is that the film-forming agent is AH-1730 with a molecular weight of 800, and the final product is a glass fiber impregnating agent.

[0080] Comparative Example 1

[0081] The difference from Example 1 is that the information of the other components is as follows:

[0082] Acryloyloxysilane coupling agent (KH-570 (Jiangsu Chenguang)) 6.5 parts;

[0083] 3.0 parts of silane coupling agent (A-187 (United Carbide));

[0084] Film-forming agent (TX-686 (Jushi Group)) 75.0 parts;

[0085] Lubricant (PEG-1000 (Jiangsu Haian)) 6.0 parts;

[0086] Surfactant (trimethyldodecyl ammonium chloride) 3.5 parts;

[0087] Anti-yellowing agent (HN-130 (Qingdao Jiedejia)) 2.0 parts;

[0088] pH adjuster (acetic acid) 4.0 parts;

[0089] The final product is a glass fiber impregnating agent.

[0090] Comparative Example 2

[0091] The difference from Example 1 is that the information of the other components is as follows:

[0092] 6.5 parts of silane coupling agent (A-187 (United Carbide));

[0093] 3.0 parts of bisaminosilane coupling agent (KH-792 (Nanjing Pinning));

[0094] Film-forming agent (AH-1730 (Anhui Anda Huatai)) 78.0 parts;

[0095] Lubricant (PEG-1000 (Jiangsu Haian)) 5.0 parts;

[0096] Surfactant (trimethyldodecyl ammonium chloride) 3.5 parts;

[0097] pH adjuster (acetic acid) 4.0 parts;

[0098] The final product is a glass fiber impregnating agent.

[0099] Performance testing:

[0100] The glass fiber impregnating agents prepared in the above examples and comparative examples were tested according to the testing methods for 1200tex yarn produced by conventional glass fiber production processes in the art. The tensile strength of the fiberglass was tested based on the ASTM D2343 test standard, and all performance parameters were characterized under the same conditions and at the same time. The test results of Examples 1-9 are shown in Table 2, and the test results of Examples 10-16, Comparative Examples 1 and 2 are shown in Table 3.

[0101] Table 2

[0102]

[0103]

[0104] Table 3

[0105]

[0106]

[0107] From the above test examples, we can see that the alkali-free glass fiber direct yarn produced using the glass fiber sizing agent of this application, according to conventional glass fiber production processes in the art, has a combustible content (i.e., the proportion of the amount of glass fiber sizing agent coated on the glass fiber to the mass of the glass fiber) between 0.40% and 0.60%. This is a reasonable range of combustible content to ensure uniform coating of the glass fiber sizing agent on the glass fiber surface and good drawing efficiency. The linear density is between 1140 tex and 1260 tex, which ensures that the final fiberglass product has suitable glass fiber content and performance strength. Compared with Comparative Examples 1 and 2, the proportion of non-smoothness in the embodiments of this invention is significantly lower than that of Comparative Examples 1 and 2, indicating that the innovative introduction of a softener in this invention can significantly improve the smoothness of use of glass fiber yarn. In addition, the yellowish appearance observed in Comparative Example 2 can well illustrate the scientific and rational nature of introducing an anti-yellowing agent in this invention. From the above formulation test examples, we can see that the embodiments of the present invention address the pain points of glass fiber customers by selecting sizing agent raw materials and optimizing the formulation to produce glass fiber with higher smoothness of use.

[0108] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0109] The coupling agent in this application acts as a "bridge" between glass fiber and resin, and is a key factor determining the strength of glass fiber and fiberglass products. Film-forming agents not only determine the softness, abrasion resistance, and dispersibility of glass fiber during the drawing process, but also affect the smoothness of subsequent glass fiber processing. Lubricants are essential components of glass fiber sizing agents, primarily to ensure the smoothness of glass fiber during drawing, increase abrasion resistance, reduce the probability of fuzzing during subsequent use, and improve the overall smoothness of the application process. The addition of softeners helps to fundamentally improve the smoothness, softness, and film-forming properties of glass fiber. The addition of surfactants helps to increase the stability of the sizing agent emulsion, thereby improving the uniformity of the glass fiber sizing agent coating. Preferably controlling the weight proportions of coupling agents, film-forming agents, lubricants, softeners, and surfactants in other components within the aforementioned range helps to fully leverage the synergistic effects of each component in the glass fiber sizing agent composition, further improving the overall performance of the glass fiber sizing agent. Applying the glass fiber sizing agent prepared by mixing the above-mentioned glass fiber sizing agent composition to the production of glass fibers results in glass fibers with good process smoothness and fiberglass mechanical properties, making it particularly suitable for users' automated yarn loading processes and batch continuous production requirements. This can significantly improve the efficiency of users' production and operation and reduce the labor intensity of workers.

[0110] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A glass fiber impregnating agent composition, characterized in that, The glass fiber impregnating agent composition comprises, by weight percentage, 92.5% to 94.5% water and 5.5% to 7.5% other components. The other components, by weight, include: 6-12 parts of coupling agent; 57-87 parts of film-forming agent; 2-8 parts of lubricant; 2-10 parts fabric softener; and 1 to 5 parts of surfactant; The softener is a silicone-based softener, and the silicone-based softener is an epoxy-modified silicone-based softener; The coupling agent is a mixture of acryloyloxysilane and diaminosilane, wherein the mass ratio of acryloyloxysilane to diaminosilane is 2~3:1; The film-forming agent is an aqueous polyurethane resin.

2. The glass fiber impregnating agent composition according to claim 1, characterized in that, The content of the softener is 3 to 7 parts; and / or the epoxy-modified silicone softener is DY-E701 with polymethylsiloxane as the main chain and / or HA-920 with active hydroxyl groups at the end.

3. The glass fiber impregnating agent composition according to claim 1 or 2, characterized in that, The coupling agent has a content of 7 to 11 parts; and / or the mass ratio of the acryloyloxysilane to the diaminosilane is 2.6 to 2.8:

1.

4. The glass fiber impregnating agent composition according to claim 1 or 2, characterized in that, The film-forming agent has a content of 62-77 parts; and / or the lubricant has a content of 3-6 parts; and / or the lubricant is a polyethylene glycol-based lubricant.

5. The glass fiber impregnating agent composition according to claim 1 or 2, characterized in that, The molecular weight of the waterborne polyurethane resin is 500-800.

6. The glass fiber impregnating agent composition according to claim 1 or 2, characterized in that, The waterborne polyurethane resin is a nonionic waterborne polyurethane resin AH-1704-1 and / or a cationic waterborne polyurethane resin AH-1730.

7. The glass fiber impregnating agent composition according to claim 4, characterized in that, The polyethylene glycol lubricant is selected from any one or more of PEG600, PEG1000, and PEG1500.

8. The glass fiber impregnating agent composition according to claim 1 or 2, characterized in that, The surfactant content is 2 to 4 parts; and / or the surfactant is a cationic surfactant.

9. The glass fiber impregnating agent composition according to claim 8, characterized in that, The cationic surfactant is a quaternary ammonium salt cationic surfactant.

10. The glass fiber impregnating agent composition according to claim 9, characterized in that, The quaternary ammonium salt cationic surfactant is trimethyldodecyl ammonium chloride and / or trimethyldodecyl ammonium bromide.

11. The glass fiber impregnating agent composition according to claim 1 or 2, characterized in that, The glass fiber sizing agent composition further includes 1 to 5 parts of a pH adjuster; and / or the pH adjuster is selected from any one or more of acetic acid, formic acid, and citric acid; and / or the glass fiber sizing agent composition further includes 1 to 3 parts of an anti-yellowing agent.

12. The glass fiber impregnating agent composition according to claim 11, characterized in that, The anti-yellowing agent is a spandex-based anti-yellowing agent.

13. The glass fiber impregnating agent composition according to claim 12, characterized in that, The anti-yellowing agents for spandex are hydrazide-based HN-150 and / or aminourea-based HN-130.

14. A method for preparing a glass fiber sizing agent, the method comprising mixing a glass fiber sizing agent composition to obtain a glass fiber sizing agent, characterized in that, The glass fiber impregnating agent composition is any one of the glass fiber impregnating agent compositions according to claims 1 to 13.

15. A glass fiber impregnating agent, characterized in that, The glass fiber sizing agent is prepared by the preparation method described in claim 14.

16. The glass fiber impregnating agent according to claim 15, characterized in that, The pH value of the glass fiber impregnating agent is 5-6.

17. A glass fiber, wherein the surface of the glass fiber is coated with a glass fiber sizing agent coating, characterized in that, The glass fiber sizing agent coating is formed by molding the glass fiber sizing agent according to claim 15 or 16.

18. The application of a glass fiber sizing agent in the preparation of alkali-free glass fiber direct yarn, characterized in that, The glass fiber sizing agent is the glass fiber sizing agent as described in claim 15 or 16.

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