Nonwoven fabric for manufacturing dustless wiping paper and method for manufacturing the same

Abstract

The application relates to the technical field of wiping paper, in particular to a non-woven fabric for manufacturing dust-free wiping paper and a preparation method thereof. The non-woven fabric for manufacturing dust-free wiping paper comprises a non-woven fabric containing cellulose fibers, needle wood fibers and polyester fibers and a chemical adhesive layer on the surface of the non-woven fabric, the chemical adhesive layer is obtained by immersing the non-woven fabric in a chemical adhesive liquid and then drying, wherein the chemical adhesive liquid is prepared from the following raw materials in mass fractions: 68-72 parts of hydrophilic monomers, 0.4-0.6 parts of polyvinyl alcohol, 9-11 parts of strong polar monomers, 97-103 parts of polyoctene copolymer emulsion, 1-1.5 parts of surfactant, 3-5 parts of allyl polyoxyethylene ether, 2.4-2.6 parts of initiator aqueous solution and 395-400 parts of deionized water, and the mass fraction ratio of the cellulose fibers, the needle wood fibers and the polyester fibers is 4:5:1. The non-woven fabric for manufacturing dust-free wiping paper and the preparation method thereof realize high cleanliness, excellent softness, good water absorption and oil absorption and a low-cost production process through a unique chemical adhesive liquid formula and a simple production process, and meet the demand of industrial and civil markets for high-quality dust-free wiping paper.

Description

Technical Field

[0001] This application relates to the field of wiping paper technology, and more particularly to a nonwoven fabric for manufacturing dust-free wiping paper and a method for preparing the same. Background Technology

[0002] Nonwoven fabric is a type of non-woven material. It is made by directly forming fibers from polymer chips, short fibers, or filaments into a web through airflow or mechanical means, then reinforcing it through hydroentangling, needle punching, or thermal rolling, and finally finishing to form a non-woven fabric. Nonwoven fabric is a new type of fiber product with a soft, breathable, and planar structure. Due to its environmental friendliness and biodegradability, it has a wide range of applications, with wiping paper being one of its main uses. Nonwoven fabrics are made from materials such as polyester, polypropylene, nylon, spandex, and acrylic, most of which have poor hydrophilicity. Wiping paper is usually made from nonwoven fabrics made by hydroentangling cellulose short fibers and polyester short fibers to improve its hydrophilicity and water absorption properties. Although the use of cellulose short fibers in nonwoven fabrics greatly improves its hydrophilicity, it also significantly increases dust generation. Wiping paper made from this type of nonwoven fabric easily sheds dust and contaminates the items being wiped during wiping, making it unsuitable for cleanroom environments.

[0003] Cleanroom wipes are nonwoven fabrics used for wiping operations in cleanrooms. They must possess characteristics such as rapid water absorption, no fiber shedding, absence of harmful heavy metals and organic matter, and low solvent leaching. Currently, there are three commonly used nonwoven fabrics for manufacturing cleanroom wipes. The first type is a nonwoven fabric made by jet spinning, combining different proportions of cellulose and polyester short fibers. Although this nonwoven fabric has good water absorption, the short fibers are prone to shedding during wiping, causing contamination of the wiping surface. The second type is a nonwoven fabric made from chemical fiber filaments, such as PP meltblown fabric, PP or PET spunbond fabric. Although the long fibers of this nonwoven fabric are not easy to shed, the water absorption is poor due to the hydrophobic surface of the chemical fibers. The third type is cellulose long-fiber nonwoven fabric. Cellulose long fibers are not easy to shed and have excellent water absorption. However, the strength of cellulose long fibers is lower than that of general chemical fibers, and the bonding force between the long fibers is weaker. During wiping, the cellulose long fibers are easily broken, resulting in poor abrasion resistance. None of the three types of nonwoven fabrics used to manufacture cleanroom wipes have antistatic properties. Their fiber surface resistance is too high, making them prone to generating static electricity during use. They are not suitable for use in the processing of static-sensitive electronic products. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides a nonwoven fabric for manufacturing cleanroom wipes and its preparation method. The nonwoven fabric of this application for manufacturing cleanroom wipes has high cleanliness, good softness, is not prone to shedding lint or dust, has high water and oil absorption, and excellent ability to clean object surfaces. Furthermore, the preparation method of this application is simple, easy to implement, low in cost, and suitable for large-scale production.

[0005] In a first aspect, this application provides a nonwoven fabric for manufacturing dust-free wiping paper, employing the following technical solution: a nonwoven fabric for manufacturing dust-free wiping paper, comprising a nonwoven fabric containing cellulose fibers, softwood fibers, and polyester fibers, and a chemical adhesive layer on the surface of the nonwoven fabric, wherein the chemical adhesive layer is obtained by immersing the nonwoven fabric in a chemical adhesive solution and then drying it, wherein the chemical adhesive solution, by mass parts, comprises the following raw materials: 68-72 parts of hydrophilic monomer, 0.4-0.6 parts of polyvinyl alcohol, 9-11 parts of highly polar monomer, 97-103 parts of polyoctene copolymer emulsion, 1-1.5 parts of surfactant, 3-5 parts of allyl polyoxyethylene ether, 2.4-2.6 parts of initiator aqueous solution, and 395-400 parts of deionized water, wherein the mass ratio of cellulose fibers, softwood fibers, and polyester fibers is 4:5:1.

[0006] By employing the above technical solutions, the components work closely together to create a high-quality product that is highly clean, soft, strong, and free of lint and dust. Cellulose fiber, softwood fiber, and polyester fiber: These three fibers are mixed in a 4:5:1 mass ratio, forming the basic structure of the nonwoven fabric. Cellulose fiber provides excellent water and oil absorption, softwood fiber increases the softness and elasticity of the nonwoven fabric, while polyester fiber enhances the overall durability and toughness. This blend of fibers not only ensures the high strength and durability of the nonwoven fabric but also endows it with excellent cleaning capabilities. Chemical adhesive layer: Through impregnation and drying processes, a uniform adhesive layer is formed on the surface of the nonwoven fabric. This layer not only further enhances the structural stability of the nonwoven fabric but also significantly improves its bonding strength with the nonwoven fabric, reducing the risk of lint and dust during use, thereby improving cleanliness. Strongly polar monomers: Monomers containing strongly polar groups such as amino and amide groups form ionic and hydrogen bonds with oxygen-containing groups on the surface of the nonwoven fabric, significantly improving the bonding strength between the chemical adhesive layer and the nonwoven fabric. This strong chemical bonding ensures the abrasion resistance and stability of the nonwoven fabric during wiping. Polyoctene copolymer emulsion: This long-chain polymer emulsion provides the nonwoven fabric with additional adhesion and flexibility. Its long-chain structure allows the nonwoven fabric to maintain sufficient strength while also possessing good softness, reducing lint and dust shedding during use and further improving cleanliness. Surfactant: With good wetting, penetration, and emulsifying properties, the surfactant improves the flowability of the chemical adhesive liquid, making it easier to penetrate into the nonwoven fabric and form a network structure. This structure not only enhances the overall performance of the nonwoven fabric but also improves its absorption capacity for liquids and oils. Allyl polyoxyethylene ether: As a flexible additive, allyl polyoxyethylene ether improves the softness of the chemical adhesive layer, making the nonwoven fabric smoother during wiping, reducing damage to the wiped surface, and providing a better user experience. Hydrophilic monomers and polyvinyl alcohol: These components enhance the water absorption of the nonwoven fabric, allowing the lint-free wiping paper to absorb moisture and oil more effectively. Hydrophilic monomers ensure rapid water absorption, while polyvinyl alcohol helps form a stable water-absorbing network structure. Initiator aqueous solution and deionized water: The initiator aqueous solution plays a crucial role in the polymerization reaction, promoting the cross-linking reaction of the monomers and forming a stable chemical structure. Deionized water, as a solvent, ensures the smooth progress of the chemical reaction while avoiding the introduction of impurities, thus guaranteeing the cleanliness of the product. In summary, the components in this application, through careful design and proportioning, work synergistically to create a nonwoven fabric for cleanroom wipes with high cleanliness, good softness, durability, and excellent cleaning ability. This product not only meets the requirements of high-demand cleanroom environments but also, due to its simple preparation method and low cost, is suitable for large-scale production and has broad application prospects.

[0007] Preferably, the hydrophilic monomer is selected from at least one of acrylic acid and methacrylic acid.

[0008] Preferably, the highly polar monomer is composed of acrylamide monomers and dimethylaminoethyl acrylate monomers in a mass ratio of 1:1.

[0009] By adopting the above technical solution, in the manufacture of nonwoven fabric for cleanroom wiping paper, the combination of highly polar monomers is selected: acrylamide monomers and dimethylaminoethyl acrylate monomers in a 1:1 mass ratio. This specific ratio and selection endow the nonwoven fabric with significant performance advantages. Acrylamide monomers: contain highly polar amide groups, which can form hydrogen bonds with oxygen-containing groups on the surface of the nonwoven fabric, thereby providing excellent adhesion. This strong chemical bond ensures the durability and stability of the nonwoven fabric during mechanical wiping, reducing fiber shedding. Dimethylaminoethyl acrylate monomers: introduce additional polar groups, such as tertiary amine groups, which can also interact with the surface of the nonwoven fabric, further enhancing the overall adhesion between the adhesive and the nonwoven fabric. In summary, the 1:1 mass ratio of acrylamide monomers and dimethylaminoethyl acrylate monomers plays a crucial role in the manufacture of nonwoven fabric for cleanroom wiping paper. The highly polar groups (amino and amide groups) in the highly polar monomers interact with the oxygen-containing groups on the surface of the nonwoven fabric through ionic bonds, hydrogen bonds, and other forces, thereby significantly improving the bonding strength with the nonwoven fabric, significantly reducing lint and dust shedding during wiping, and thus improving cleanliness.

[0010] Preferably, the acrylamide monomer is selected from at least one of acrylamide and methacrylamide; the dimethylaminoethyl acrylate monomer is selected from at least one of dimethylaminoethyl acrylate and dimethylaminoethyl methacrylate.

[0011] Preferably, the preparation method of the polyoctene copolymer emulsion is as follows: 400 parts by mass of deionized water and 0.5 parts by mass of emulsifier are added to a glass reactor, high-purity nitrogen is introduced, and the mixture is stirred at a stirring speed of 300-350 rpm for 1-1.5 h. Then, 15 parts by mass of 1-octene are added, and the mixture is stirred at a stirring speed of 300-350 rpm for 0.8-1 h. The temperature is raised to 61-65℃ and kept constant. Then, 1 part by mass of a 10% initiator aqueous solution is added and reacted at 61-63℃ for 2-2.5 h. Subsequently, 70 parts by mass of 1-octene, 15 parts by mass of perfluoromethyl vinyl ether, and 4 parts by mass of a 10% initiator aqueous solution are added dropwise to the reactor using a peristaltic pump over a time of 3-3.5 h. The mixture is reacted at 61-63℃ for 5-6 h. After the reaction is completed, the mixture is cooled to room temperature and filtered through a 150-mesh sieve to obtain the polyoctene copolymer emulsion.

[0012] By employing the above-mentioned technical solution, the prepared long-chain polyoctene copolymer emulsion provides excellent adhesion properties, ensuring a tight bond between the chemical adhesive layer and the nonwoven fabric. Its long-chain structure provides sufficient flexibility, resulting in excellent softness in the nonwoven fabric used to manufacture cleanroom wipes, significantly reducing lint and dust shedding during wiping and thus improving cleanliness. The preparation method of the polyoctene copolymer emulsion is simple, easy to implement, and inexpensive, making it suitable for large-scale production. This reduces the production cost of cleanroom wipes and facilitates their widespread application. In summary, the polyoctene copolymer emulsion plays multiple roles and has synergistic effects in the manufacture of nonwoven fabrics for cleanroom wipes, including enhancing adhesion properties, improving the softness of the chemical adhesive layer, and improving the overall performance of the nonwoven fabric, thus contributing to improved quality and performance of cleanroom wipes.

[0013] Preferably, the initiator is ammonium persulfate and the emulsifier is sodium dodecyl sulfate.

[0014] Preferably, the surfactant is composed of fatty alcohol polyoxyethylene ether, polyvinylpyrrolidone K30 and dodecyl dihydroxyethyl methyl ammonium chloride in a mass ratio of 4:4:5.

[0015] By employing the above technical solutions, surfactants possess excellent wetting, penetrating, and emulsifying properties, improving the flowability of chemical adhesive solutions and allowing them to penetrate into the nonwoven fabric to form a network structure, thereby significantly enhancing the overall performance of the nonwoven fabric. Fatty alcohol polyoxyethylene ether, as a nonionic surfactant, reduces the surface tension of the liquid, improving the flowability and penetrability of the chemical adhesive solution, making it easier for the adhesive to penetrate evenly into the internal structure of the nonwoven fabric. Polyvinylpyrrolidone K30 has good solubility and stable emulsifying properties, maintaining the uniform dispersion of components in the chemical adhesive solution, preventing stratification and sedimentation, and ensuring the stability of the adhesive solution. Dodecyl dihydroxyethyl methyl ammonium chloride, a cationic surfactant, has excellent wetting, cleaning, and antistatic properties, improving the cleaning effect of lint-free wiping paper on object surfaces. The combined use of these three surfactants can leverage their synergistic effect. Fatty alcohol polyoxyethylene ether provides flowability and penetrability, polyvinylpyrrolidone K30 maintains emulsification stability, while dodecyl dihydroxyethyl methyl ammonium chloride provides additional wetting, cleaning, and antistatic properties. This synergistic effect makes the chemical adhesive solution more efficient in treating nonwoven fabrics, allowing it to penetrate the fabric and form a web structure. This significantly improves the overall performance of the nonwoven fabric, especially in terms of cleanliness and reducing lint and dust. In summary, the use of this specific ratio of mixed surfactants not only improves the performance of the chemical adhesive solution but also optimizes the manufacturing process of the cleanroom wipes and the quality of the final product.

[0016] Preferably, the polyvinyl alcohol is PVA 1799.

[0017] Preferably, the initiator aqueous solution has a mass concentration of 15%, and the initiator is ammonium persulfate.

[0018] Secondly, this application provides a method for preparing a nonwoven fabric for manufacturing dust-free wiping paper, using the following technical solution:

[0019] As a general technical concept, this application also provides a method for preparing the above-mentioned nonwoven fabric for manufacturing dust-free wiping paper, comprising the following steps:

[0020] S101. According to the mass fraction, add deionized water and polyvinyl alcohol to a glass reactor, purge with high-purity nitrogen, and stir at a stirring speed of 300-350 rpm for 1-1.2 h. Then, add hydrophilic monomer, strong polar monomer, polyoctene copolymer emulsion, liquid allyl polyoxyethylene ether, and surfactant in sequence, raise the temperature to 61-63℃ and keep it constant. Then, add an initiator aqueous solution to initiate the reaction. After reacting for 8-9 h, stop heating and cool to room temperature to obtain a chemical adhesive liquid.

[0021] S102. A nonwoven fabric containing cellulose fiber, sapwood fiber and polyester fiber is impregnated and padded with a chemical adhesive liquid, with a padded rate of 160%.

[0022] S103. The nonwoven fabric treated in step S102 is baked at 150-160℃ for 90-120 seconds to obtain a nonwoven fabric for manufacturing dust-free wiping paper.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. High cleanliness and low lint / dust shedding: By using a specific chemical adhesive formulation, including highly polar monomers and polyoctene copolymer emulsions, the adhesion strength between the nonwoven fabric surface of the lint-free wiping paper and the chemical adhesive layer is significantly improved. The polar groups in the highly polar monomers form ionic and hydrogen bonds with the oxygen-containing groups on the nonwoven fabric surface, enhancing adhesion and thus significantly reducing lint / dust shedding during wiping, thereby improving the cleanliness of the product.

[0025] 2. Excellent softness and absorbency: The addition of allyl polyoxyethylene ether improves the softness of the chemical adhesive layer, making the lint-free wipes more comfortable to use, while maintaining good absorbency and improving cleaning efficiency.

[0026] 3. Improved overall performance: The use of surfactants not only improves the flowability and permeability of chemical adhesive liquids, but also helps to form a network structure, enhancing the internal bonding force of nonwoven fabrics, thereby improving the overall performance of nonwoven fabrics, including durability and cleaning ability.

[0027] 4. Simple and easy preparation method: The preparation method provided in this application is simple and easy to implement, requiring no complex processes or expensive equipment, and is suitable for large-scale production. This simplicity reduces production costs, making the production of cleanroom wipes more economical and efficient.

[0028] 5. Low cost and suitable for large-scale production: By optimizing the formula and production process, the manufacturing method of this application achieves cost control while ensuring product quality, making the product competitive in the market.

[0029] 6. Environmentally friendly: It uses deionized water and renewable resources such as cellulose fiber and softwood fiber, which reduces the impact on the environment and meets the requirements of sustainable development.

[0030] 7. Synergistic effect: The synergistic effect of components such as polyoctene copolymer emulsion, surfactant and strong polar monomer improves the performance of the dust-free wiping paper, so that it can maintain excellent cleaning effect while also having good physical properties and service life. Detailed Implementation

[0031] The embodiments of this application will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are for illustrative purposes only and should not be considered as limiting the scope of this application. Unless otherwise specified in the examples, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all commercially available conventional products.

[0032] In the following examples, preparation examples, and comparative examples, 1 part represents 10g.

[0033] Preparation Example 1: Preparation of Polyoctene Copolymer Emulsion

[0034] The preparation method of polyoctene copolymer emulsion is as follows: 400 parts by mass of deionized water and 0.5 parts by mass of sodium dodecyl sulfate are added to a glass reactor, high-purity nitrogen is introduced, and the mixture is stirred at 330 rpm for 1.3 h. Then, 15 parts by mass of 1-octene are added, and the mixture is stirred at 330 rpm for 1 h. The temperature is raised to 63℃ and kept constant. Then, 1 part by mass of 10% ammonium persulfate aqueous solution is added and the mixture is reacted at 62℃ for 2.3 h. Subsequently, 70 parts by mass of 1-octene, 15 parts by mass of perfluoromethyl vinyl ether, and 4 parts by mass of 10% ammonium persulfate aqueous solution are added dropwise to the reactor using a peristaltic pump over a period of 3.4 h. The mixture is then reacted at 62℃ for 5.6 h. After the reaction is completed, the mixture is cooled to room temperature and filtered through a 150-mesh sieve to obtain the polyoctene copolymer emulsion.

[0035] Example 1

[0036] A nonwoven fabric for manufacturing dust-free wiping paper comprises a nonwoven fabric containing cellulose fibers, needle-wood fibers, and polyester fibers, and a chemical adhesive layer on the surface of the nonwoven fabric. The chemical adhesive layer is obtained by immersing the nonwoven fabric in a chemical adhesive solution and then drying it. The chemical adhesive solution, by weight, comprises the following raw materials: 68 parts of a hydrophilic monomer and polyvinyl alcohol (PVA). The composition comprises 0.4 parts of 1799), 9 parts of a highly polar monomer, 97 parts of a polyoctene copolymer emulsion, 1 part of a surfactant, 3 parts of allyl polyoxyethylene ether, 2.4 parts of a 15% ammonium persulfate solution, and 395 parts of deionized water, wherein the mass ratio of cellulose fiber, softwood fiber, and polyester fiber is 4:5:1, the hydrophilic monomer is acrylic acid, the highly polar monomer is composed of acrylamide monomer and dimethylaminoethyl acrylate monomer in a mass ratio of 1:1, wherein the acrylamide monomer is acrylamide, the dimethylaminoethyl acrylate monomer is dimethylaminoethyl acrylate, and the surfactant is composed of fatty alcohol polyoxyethylene ether, polyvinylpyrrolidone K30, and dodecyl dihydroxyethylmethyl ammonium chloride in a mass ratio of 4:4:5.

[0037] The above-mentioned method for preparing nonwoven fabric for manufacturing dust-free wiping paper includes the following steps:

[0038] S101. According to the mass fraction, deionized water and polyvinyl alcohol are added to a glass reactor, high-purity nitrogen is introduced, and the mixture is stirred at a stirring speed of 300 rpm for 1.2 h. Then, hydrophilic monomers, strongly polar monomers, polyoctene copolymer emulsion, liquid allyl polyoxyethylene ether, and surfactant are added in sequence. The temperature is raised to 61°C and kept constant. Then, a 15% mass concentration of ammonium persulfate aqueous solution is added to initiate the reaction. After reacting for 9 h, heating is stopped, and the mixture is cooled to room temperature to obtain a chemical adhesive liquid.

[0039] S102. A nonwoven fabric containing cellulose fiber, sapwood fiber and polyester fiber is impregnated and padded with a chemical adhesive liquid, with a padded rate of 160%.

[0040] S103. The nonwoven fabric treated in step S102 is baked at 150°C for 120 seconds to obtain a nonwoven fabric for manufacturing dust-free wiping paper.

[0041] Example 2

[0042] A nonwoven fabric for manufacturing dust-free wiping paper comprises a nonwoven fabric containing cellulose fibers, softwood fibers, and polyester fibers, and a chemical adhesive layer on the surface of the nonwoven fabric. The chemical adhesive layer is obtained by immersing the nonwoven fabric in a chemical adhesive solution and then drying it. The chemical adhesive solution, by weight, comprises the following raw materials: 72 parts hydrophilic monomer, 0.6 parts polyvinyl alcohol (PVA1799), 11 parts highly polar monomer, 103 parts polyoctene copolymer emulsion, 1.5 parts surfactant, 5 parts allyl polyoxyethylene ether, and 2.6 parts 15% ammonium persulfate solution. The mixture contains 400 parts of deionized water, wherein the mass ratio of cellulose fiber, softwood fiber, and polyester fiber is 4:5:1; the hydrophilic monomer is methacrylic acid; the strongly polar monomer is composed of acrylamide monomer and dimethylaminoethyl acrylate monomer in a mass ratio of 1:1, wherein the acrylamide monomer is acrylamide and dimethylaminoethyl acrylate monomer is dimethylaminoethyl methacrylate; and the surfactant is composed of fatty alcohol polyoxyethylene ether, polyvinylpyrrolidone K30, and dodecyl dihydroxyethyl methyl ammonium chloride in a mass ratio of 4:4:5.

[0043] The above-mentioned method for preparing nonwoven fabric for manufacturing dust-free wiping paper includes the following steps:

[0044] S101. According to the mass fraction, deionized water and polyvinyl alcohol are added to a glass reactor, high-purity nitrogen is introduced, and the mixture is stirred at a stirring speed of 350 rpm for 1 hour. Then, hydrophilic monomers, strongly polar monomers, polyoctene copolymer emulsion, liquid allyl polyoxyethylene ether, and surfactant are added in sequence. The temperature is raised to 63°C and kept constant. Then, a 15% mass concentration of ammonium persulfate aqueous solution is added to initiate the reaction. After reacting for 8 hours, heating is stopped, and the mixture is cooled to room temperature to obtain a chemical adhesive liquid.

[0045] S102. A nonwoven fabric containing cellulose fiber, sapwood fiber and polyester fiber is impregnated and padded with a chemical adhesive liquid, with a padded rate of 160%.

[0046] S103. The nonwoven fabric treated in step S102 is baked at 160°C for 90 seconds to obtain a nonwoven fabric for manufacturing dust-free wiping paper.

[0047] Example 3

[0048] A nonwoven fabric for manufacturing dust-free wiping paper comprises a nonwoven fabric containing cellulose fibers, needle-wood fibers, and polyester fibers, and a chemical adhesive layer on the surface of the nonwoven fabric. The chemical adhesive layer is obtained by immersing the nonwoven fabric in a chemical adhesive solution and then drying it. The chemical adhesive solution, by weight, comprises the following raw materials: 70 parts hydrophilic monomer and polyvinyl alcohol (PVA). The composition comprises 0.5 parts of 1799), 10 parts of a highly polar monomer, 100 parts of a polyoctene copolymer emulsion, 1.3 parts of a surfactant, 4 parts of allyl polyoxyethylene ether, 2.5 parts of a 15% ammonium persulfate solution, and 398 parts of deionized water, wherein the mass ratio of cellulose fiber, softwood fiber, and polyester fiber is 4:5:1, the hydrophilic monomer is methacrylic acid, the highly polar monomer is composed of acrylamide monomer and dimethylaminoethyl acrylate monomer in a mass ratio of 1:1, wherein the acrylamide monomer is methacrylamide, and the dimethylaminoethyl acrylate monomer is dimethylaminoethyl acrylate, and the surfactant is composed of fatty alcohol polyoxyethylene ether, polyvinylpyrrolidone K30, and dodecyl dihydroxyethyl methyl ammonium chloride in a mass ratio of 4:4:5.

[0049] The above-mentioned method for preparing nonwoven fabric for manufacturing dust-free wiping paper includes the following steps:

[0050] S101. According to the mass fraction, deionized water and polyvinyl alcohol are added to a glass reactor, high-purity nitrogen is introduced, and the mixture is stirred at a stirring speed of 330 rpm for 1.1 h. Then, hydrophilic monomers, strongly polar monomers, polyoctene copolymer emulsion, liquid allyl polyoxyethylene ether, and surfactant are added in sequence. The temperature is raised to 62°C and kept constant. Then, a 15% mass concentration of ammonium persulfate aqueous solution is added to initiate the reaction. After reacting for 8.5 h, heating is stopped, and the mixture is cooled to room temperature to obtain a chemical adhesive liquid.

[0051] S102. A nonwoven fabric containing cellulose fiber, sapwood fiber and polyester fiber is impregnated and padded with a chemical adhesive liquid, with a padded rate of 160%.

[0052] S103. The nonwoven fabric treated in step S102 is baked at 155°C for 105 seconds to obtain a nonwoven fabric for manufacturing dust-free wiping paper.

[0053] Example 4

[0054] A nonwoven fabric for manufacturing dust-free wiping paper comprises a nonwoven fabric containing cellulose fibers, needle-wood fibers, and polyester fibers, and a chemical adhesive layer on the surface of the nonwoven fabric. The chemical adhesive layer is obtained by immersing the nonwoven fabric in a chemical adhesive solution and then drying it. The chemical adhesive solution, by weight, comprises the following raw materials: 70 parts hydrophilic monomer and polyvinyl alcohol (PVA). The composition comprises 0.5 parts of 1799), 10 parts of a highly polar monomer, 100 parts of a polyoctene copolymer emulsion, 1.3 parts of a surfactant, 4 parts of allyl polyoxyethylene ether, 2.5 parts of a 15% ammonium persulfate solution, and 398 parts of deionized water, wherein the mass ratio of cellulose fiber, softwood fiber, and polyester fiber is 4:5:1, the hydrophilic monomer is methacrylic acid, the highly polar monomer is composed of acrylamide monomers and dimethylaminoethyl acrylate monomers in a mass ratio of 1:1, wherein the acrylamide is methacrylamide; the dimethylaminoethyl acrylate monomer is dimethylaminoethyl methacrylate, and the surfactant is composed of fatty alcohol polyoxyethylene ether, polyvinylpyrrolidone K30, and dodecyl dihydroxyethyl methyl ammonium chloride in a mass ratio of 4:4:5.

[0055] The above-mentioned method for preparing nonwoven fabric for manufacturing dust-free wiping paper includes the following steps:

[0056] S101. According to the mass fraction, deionized water and polyvinyl alcohol are added to a glass reactor, high-purity nitrogen is introduced, and the mixture is stirred at a stirring speed of 330 rpm for 1.1 h. Then, hydrophilic monomers, strongly polar monomers, polyoctene copolymer emulsion, liquid allyl polyoxyethylene ether, and surfactant are added in sequence. The temperature is raised to 62°C and kept constant. Then, a 15% mass concentration of ammonium persulfate aqueous solution is added to initiate the reaction. After reacting for 8.5 h, heating is stopped, and the mixture is cooled to room temperature to obtain a chemical adhesive liquid.

[0057] S102. A nonwoven fabric containing cellulose fiber, sapwood fiber and polyester fiber is impregnated and padded with a chemical adhesive liquid, with a padded rate of 160%.

[0058] S103. The nonwoven fabric treated in step S102 is baked at 155°C for 105 seconds to obtain a nonwoven fabric for manufacturing dust-free wiping paper.

[0059] Comparative Example 1

[0060] Same as Example 4, except that the amount of polyoctene copolymer emulsion added is 0 parts.

[0061] Comparative Example 2

[0062] Similar to Example 4, except that the surfactant is a fatty alcohol polyoxyethylene ether.

[0063] Comparative Example 3

[0064] Same as in Example 4, except that the surfactant is polyvinylpyrrolidone K30.

[0065] Comparative Example 4

[0066] Same as in Example 4, except that the surfactant is dodecyl dihydroxyethyl methyl ammonium chloride.

[0067] Performance testing

[0068] Samples of the nonwoven fabrics used for manufacturing dust-free wiping paper prepared in Examples 1-4 and Comparative Examples 1-4 were taken and tested as follows. The test results are shown in Table 1.

[0069] Water absorption test: Cut the non-woven fabric into small pieces of 15mm×150mm, take 100 pieces and weigh them a, then soak them in a dish of distilled water at room temperature for 10 minutes, take them out and weigh them b. Water absorption rate = (ba) / a×100%. Take the average value after 5 measurements.

[0070] Total nonvolatile organic compounds (NVR): The total weight of nonvolatile organic compounds extracted from a unit area of ​​nonwoven fabric by solvents including isopropanol and water, according to IEST-RP-CC004.2 sec.6.1.2.

[0071] Fiber shedding count: The solvent used is water. According to IEST-RP-CC004.2sec.5.2, the number of shed fibers with a length greater than or equal to 100μm extracted by water through a shaking method per unit area of ​​nonwoven fabric is tested.

[0072] The softness test method is as follows: Select 10 women aged 25-30, rub the paper with your hands to remove dust, and score the softness of all samples according to the touch, from 1 to 10. The higher the score, the softer the paper. The result is the average of the 10 people.

[0073] Table 1 Performance Tests

[0074]

[0075] Analyzing the data in Table 1, we can see that:

[0076] 1) The nonwoven fabrics prepared in Examples 1-4 for manufacturing dust-free wiping paper have high cleanliness, good softness, are not prone to shedding or dusting, have high water and oil absorption, and excellent ability to clean object surfaces. Furthermore, the preparation method of this application is simple, easy to implement, low in cost, and suitable for large-scale production.

[0077] 2) A comparative analysis of the performance of the nonwoven fabrics used to manufacture cleanroom wipes prepared in Example 4 and Comparative Example 1 shows that the long-chain polyoctene copolymer emulsion prepared in this application can provide good adhesion properties, ensuring a tight bond between the chemical adhesive layer and the nonwoven fabric. Its long-chain structure provides sufficient flexibility, giving the nonwoven fabric used to manufacture cleanroom wipes excellent softness, significantly reducing lint and dust shedding during wiping, thereby improving cleanliness.

[0078] 3) The performance comparison analysis of the nonwoven fabrics used to manufacture dust-free wiping paper prepared in Example 4 and Comparative Examples 2-4 shows that the surfactant is composed of fatty alcohol polyoxyethylene ether, polyvinylpyrrolidone K30 and dodecyl dihydroxyethyl methyl ammonium chloride in a mass ratio of 4:4:5. By utilizing their synergistic effect, the fluidity of the chemical adhesive liquid can be improved, allowing it to penetrate into the interior of the nonwoven fabric and form a network structure, thereby significantly improving the overall performance of the nonwoven fabric.

[0079] The above embodiments are only used to explain the technical solutions of this application and are not intended to limit it. Although the above embodiments have provided specific descriptions of this application, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation methods of this application. Any modifications and equivalent substitutions that do not depart from the spirit and scope of this application should be covered within the protection scope of this application.

Claims

1. A nonwoven fabric for manufacturing dust-free wiping paper, characterized in that, The invention comprises a nonwoven fabric containing cellulose fibers, softwood fibers, and polyester fibers, and a chemical adhesive layer on the surface of the nonwoven fabric. The chemical adhesive layer is prepared by immersing the nonwoven fabric in a chemical adhesive solution and then drying it. The chemical adhesive solution, by mass parts, comprises the following raw materials: 68-72 parts of hydrophilic monomer, 0.4-0.6 parts of polyvinyl alcohol, 9-11 parts of highly polar monomer, 97-103 parts of polyoctene copolymer emulsion, 1-1.5 parts of surfactant, 3-5 parts of allyl polyoxyethylene ether, 2.4-2.6 parts of initiator aqueous solution, and 395-400 parts of deionized water. The mass ratio of cellulose fibers, softwood fibers, and polyester fibers is 4:5:

1. The hydrophilic monomer is selected from at least one of acrylic acid and methacrylic acid; The highly polar monomer is composed of acrylamide monomers and dimethylaminoethyl acrylate monomers in a mass ratio of 1:

1. The acrylamide monomer is selected from at least one of acrylamide and methacrylamide; the dimethylaminoethyl acrylate monomer is selected from at least one of dimethylaminoethyl acrylate and dimethylaminoethyl methacrylate. The preparation method of the polyoctene copolymer emulsion is as follows: 400 parts by mass of deionized water and 0.5 parts by mass of emulsifier are added to a glass reactor. High-purity nitrogen is introduced, and the mixture is stirred at 300-350 rpm for 1-1.5 hours. Then, 15 parts by mass of 1-octene are added, and the mixture is stirred at 300-350 rpm for 0.8-1 hours. The temperature is raised to 61-65℃ and maintained at a constant temperature. Then, 1 part by mass of a 10% initiator aqueous solution is added, and the mixture is reacted at 61-63℃ for 2-2.5 hours. Subsequently, 70 parts by mass of 1-octene, 15 parts by mass of perfluoromethyl vinyl ether, and 4 parts by mass of a 10% initiator aqueous solution are added dropwise to the reactor using a peristaltic pump over a period of 3-3.5 hours. The mixture is reacted at 61-63℃ for 5-6 hours. After the reaction is completed, the mixture is cooled to room temperature and filtered through a 150-mesh sieve to obtain the polyoctene copolymer emulsion.

2. The nonwoven fabric for manufacturing dust-free wiping paper according to claim 1, characterized in that, The initiator is ammonium persulfate, and the emulsifier is sodium dodecyl sulfate.

3. The nonwoven fabric for manufacturing dust-free wiping paper according to claim 1, characterized in that, The surfactant is composed of fatty alcohol polyoxyethylene ether, polyvinylpyrrolidone K30 and dodecyl dihydroxyethyl methyl ammonium chloride in a mass ratio of 4:4:

5.

4. The nonwoven fabric for manufacturing dust-free wiping paper according to claim 1, characterized in that, The polyvinyl alcohol is PVA 1799.

5. The nonwoven fabric for manufacturing dust-free wiping paper according to claim 1, characterized in that, The initiator aqueous solution has a mass concentration of 15%, and the initiator is ammonium persulfate.

6. A method for preparing a nonwoven fabric for manufacturing dust-free wiping paper as described in any one of claims 1-5, characterized in that, Includes the following steps: S101. According to the mass fraction, add deionized water and polyvinyl alcohol to a glass reactor, purge with high-purity nitrogen, and stir at a stirring speed of 300-350 rpm for 1-1.2 h. Then, add hydrophilic monomer, strong polar monomer, polyoctene copolymer emulsion, liquid allyl polyoxyethylene ether, and surfactant in sequence, raise the temperature to 61-63℃ and keep it constant. Then, add an initiator aqueous solution to initiate the reaction. After reacting for 8-9 h, stop heating and cool to room temperature to obtain a chemical adhesive liquid. S102. A nonwoven fabric containing cellulose fiber, sapwood fiber and polyester fiber is impregnated and padded with a chemical adhesive liquid, with a padded rate of 160%. S103. The nonwoven fabric treated in step S102 is baked at 150-160℃ for 90-120 seconds to obtain a nonwoven fabric for manufacturing dust-free wiping paper.

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