Elastic spun-bonded non-woven fabric as well as preparation method and application thereof

Abstract

The invention relates to the technical field of non-woven fabrics, and provides an elastic spunbond non-woven fabric and a preparation method and application thereof, and the elastic spunbond non-woven fabric comprises the following raw materials by weight: 40-60 parts of polypropylene; 40 to 60 parts of a propylene-ethylene copolymer; 1-8 parts of a stabilizer; and 1-6 parts of a softener. According to the elastic spun-bonded non-woven fabric provided by the invention, a certain amount of the propylene-ethylene copolymer, the stabilizer and the softener are added into the polypropylene, and the propylene-ethylene copolymer is an elastic crystal and has good elasticity and viscosity, so that the defect that the non-woven fabric is not good enough in extensibility is overcome; due to the adoption of the stabilizer and the softener, the problem that the cloth cover of the non-woven fabric is relatively high in viscosity after the propylene-ethylene polymer is added is solved, so that a cloth roll is easy to wind and unwind; meanwhile, the propylene-ethylene polymer is good in viscidity, so that the phenomenon that fine fluff is easy to fall off on the surface of common non-woven fabric is also solved.

Description

Technical Field

[0001] The present application belongs to the technical field of nonwoven fabrics, and in particular relates to an elastic spunbond nonwoven fabric and a preparation method and application thereof. Background Art

[0002] Nonwoven fabric is a unique fabric that is not made through traditional spinning and weaving processes, but by directional or random arrangement of textile staple fibers or filaments to form a fiber mesh structure, and reinforced by mechanical, thermal bonding or chemical methods. Due to its unique properties and wide range of applications, nonwoven fabrics have become an indispensable part of modern society. Its main application areas include: medical, packaging, agriculture, industry, life and other fields.

[0003] The existing non-woven fabrics on the market do not have good stretchability and elasticity (especially in the application field of medical ointments), and ordinary non-woven fabrics are prone to shedding fine fluff on the surface, which affects the customer's use effect during use.

[0004] In summary, the current non-woven fabrics have poor stretchability and are prone to shedding fine fluff on the surface, making it difficult to meet current usage needs. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide an elastic spunbond nonwoven fabric and a preparation method and application thereof, aiming to solve the problem that the current nonwoven fabric has poor stretchability and is prone to shedding fine fluff on the surface.

[0006] In order to achieve the above application purpose, the technical solution adopted in this application is as follows:

[0007] In a first aspect, an embodiment of the present application provides an elastic spunbonded nonwoven fabric, comprising the following raw materials in parts by weight:

[0008] Polypropylene 40-60 parts;

[0009] 40-60 parts of propylene-ethylene copolymer;

[0010] 1 to 8 parts of stabilizer;

[0011] 1 to 6 parts of softener.

[0012] Using polypropylene as the main raw material ensures the basic properties of non-woven fabrics, such as light weight, good softness, strong drainage and air permeability. The addition of propylene-ethylene copolymer is used to improve the elasticity and wear resistance of non-woven fabrics, giving them better physical and mechanical properties. Adding 1 to 8 parts of stabilizer can effectively inhibit the oxidative degradation reaction of polypropylene during processing and use, thereby extending the service life of non-woven fabrics and ensuring stable product performance. Adding 1 to 6 parts of softener can improve the touch and softness of non-woven fabrics, making them more comfortable and easy to process.

[0013] The elastic spunbond nonwoven fabric provided in the embodiment of the present application is prepared by adding a certain amount of propylene-ethylene copolymer, stabilizer and softener to polypropylene, wherein the propylene-ethylene polymer is an elastic crystal with excellent elasticity and viscosity, thereby solving the defect that the stretchability of the nonwoven fabric is not good enough, and the nonwoven fabric has good stretchability in both the longitudinal and transverse directions. The stabilizer and softener solve the problem that the surface of the nonwoven fabric is more sticky due to the addition of the propylene-ethylene polymer, making the fabric roll easy to roll up and unroll. At the same time, the propylene-ethylene polymer also solves the problem that the surface of ordinary nonwoven fabrics is prone to falling fine fluff due to its good viscosity.

[0014] In some embodiments, the propylene-ethylene copolymer includes a random copolymer or a block copolymer. Propylene-ethylene copolymer is a synthetic material formed by copolymerization of propylene and ethylene monomers. According to the different copolymerization methods and conditions, it can be divided into two categories: random copolymers and block copolymers. Among them, random copolymers: propylene and ethylene segments are randomly distributed in the polymer main chain. When the ethylene content (mass fraction is 1% to 7%) reaches a certain level, the presence of ethylene inhibits the crystallization of propylene, causing the crystallinity of the random copolymer to decrease. Block copolymers: have a clear sequence of propylene and ethylene segments, forming an alternating "block" structure with a certain rigidity and improved impact strength.

[0015] In some embodiments, the propylene-ethylene copolymer includes a random copolymer and a block copolymer, wherein the mass ratio of the random copolymer to the block copolymer is 1:(0.5-1). Optionally, the mass ratio of the random copolymer to the block copolymer is 1:0.5. Optionally, the mass ratio of the random copolymer to the block copolymer is 1:0.75. Preferably, the mass ratio of the random copolymer to the block copolymer is 1:1. Thus, the advantages of random copolymers and block copolymers can be effectively combined, namely, the low crystallinity, high transparency, high flexibility and impact resistance of random copolymers, and the strong rigidity and low temperature toughness of block copolymers. Moreover, in the above range of ratios, the advantages of both random copolymers and block copolymers can be best combined, thereby maximizing the elasticity and viscosity of propylene-ethylene copolymers.

[0016] In some embodiments, the following raw materials are also included in parts by weight:

[0017] Masterbatch 0.5-2 parts;

[0018] 1 to 5 parts of functional masterbatch. Masterbatch is a pigment or pigment premix used to change the appearance and color of non-woven fabrics. They usually exist in granular or powdered form and can be mixed with non-woven materials to change their color and effect. Functional masterbatch is a concentrate of various plastic additives, which are usually added in the form of masterbatch to improve the functionality of non-woven fabrics. Functional masterbatches include flame retardant masterbatches, antibacterial masterbatches, antistatic masterbatches, hydrophilic functional masterbatches, negative ion functional masterbatches, etc. Among them, flame retardant functional masterbatch: improves the flame retardant properties of non-woven fabrics and is often used in clothing, construction, automobiles and other fields. Antibacterial functional masterbatch: gives non-woven fabrics antibacterial properties and is suitable for medical, health and other fields. Antistatic functional masterbatch: reduces the surface resistivity of non-woven fabrics and eliminates static electricity. It is often used in electronic product packaging, dust-free workshops, etc. Hydrophilic functional masterbatch: improves the hydrophilicity of non-woven fabrics and is suitable for baby diapers, facial masks, medical wound patches, etc. Negative ion functional masterbatch: enables non-woven fabric to release negative ions, helps improve air quality, and is commonly used in home decoration, air purification and other fields. In the embodiment of the present application, during the production process of non-woven fabric, the corresponding functional masterbatch is added to the non-woven fabric raw material according to the required functionality, and the non-woven fabric product with specific functionality is made through the corresponding processing equipment.

[0019] In some embodiments, the melting point of the mixture of the polypropylene and the propylene-ethylene copolymer is 80 to 180°C;

[0020] The melt index of the mixture of the polypropylene and the propylene-ethylene copolymer is 20 to 88 g / 10 min.

[0021] Since the amount of stabilizer, softener, masterbatch and functional masterbatch added is small, the melting point and melt index of the raw material can be regarded as the melting point and melt index of the mixture of polypropylene and propylene-ethylene copolymer. The melting point is preferably 80-180°C. The hot-flying non-woven fabric is prepared by heating the polymer fiber at high temperature to fuse it into a mesh structure. Therefore, the melting point of hot-flying non-woven fabric is usually high because the melting point of its raw material polymer fiber is very high. For example, the melting point of polypropylene fiber is about 160°C, so the melting point of hot-flying non-woven fabric is generally above 150°C. Unlike non-woven fabrics, cold-flying non-woven fabrics are manufactured by cooling and molding, and the polymer fibers are not subjected to high-temperature thermal treatment during the manufacturing process. The melting point of cold-flying non-woven fabrics is low, usually around 110°C. The melt index is preferably 20-1800g / 10min. The size of the melt index directly affects the preparation process and product performance of melt-blown non-woven fabrics. The larger the melt index, the better the melt fluidity of the material, and the more suitable it is for the melt-blown process with poor drafting. In the embodiments of the present application, nonwoven fabrics for different purposes have different requirements for melt index. For example, sanitary materials usually use spunbond polypropylene and propylene-ethylene copolymer with a melt index of 35-40 g / 10min and meltblown polypropylene and propylene-ethylene copolymer with a melt index of 1200-1500 g / 10min; medical products use spunbond polypropylene and propylene-ethylene copolymer with a melt index of 40 g / 10min and meltblown polypropylene and propylene-ethylene copolymer with a melt index of 1300-1500 g / 10min; and industrial products use spunbond polypropylene and propylene-ethylene copolymer with a melt index of 33-35 g / 10min.

[0022] In a second aspect, the present application provides a method for preparing an elastic spunbonded nonwoven fabric, comprising the following steps:

[0023] Providing the raw material described in the first aspect;

[0024] Mixing the raw materials, extruding and melting them to obtain a molten material;

[0025] Spinning the molten material to obtain a filament bundle;

[0026] After cooling, the filament bundles are stretched and laid to form a fiber web;

[0027] The fiber web is subjected to hot rolling to obtain an elastic spunbonded nonwoven fabric.

[0028] The preparation method of the elastic spunbond nonwoven fabric provided in the embodiment of the present application, wherein the mixing and extrusion melting process ensures the uniformity and melting effect of the raw materials, and provides a good raw material basis for the subsequent spinning process. The processes such as spinning, drafting, and laying are continuous and efficient, eliminating the cumbersome intermediate process, reducing production costs, and improving market competitiveness. The hot rolling forming process uses high temperature and pressure to bond the fibers to each other to form a uniform and firm fiber web, further improving the strength and durability of the nonwoven fabric. The elastic spunbond nonwoven fabric finally obtained has excellent elasticity, softness, air permeability, and wear resistance, and is suitable for home decoration, industrial industry, medical care industry, agricultural environmental protection industry and other fields. In addition, the preparation process does not involve the use of toxic and harmful chemicals, which further improves the environmental protection of the product. And the preparation process eliminates the cumbersome intermediate process, reduces production costs, and the price of the raw materials used is relatively low, so that the cost of the final product is low and the market competitiveness is strong. The function of drafting is to arrange the polymer crystals of the filaments neatly, improve the orientation degree of the macromolecules in the filaments along the axial direction, and produce certain mechanical properties, thereby obtaining fibers with certain orientation, mechanical properties and certain fineness, and the fibers have certain strength, wear resistance and appropriate elongation. Drafting can be performed using a slit airflow drafter. The drafting rate is preferably, but not limited to, 1500 to 3500 m / min. Laying can be performed using a web-forming machine. The web curtain rate of the web-forming machine is preferably 10 to 300 m / min. Of course, in order to facilitate the web to be better attached to the web-forming machine during the laying process, a suction device can be provided, and the suction device can also exhaust excess wind.

[0029] In some embodiments, before spinning the molten material to obtain the filament bundle, the process further includes: filtering, metering and distributing the molten material; the distribution is completed by the spinning manifold. The main function of the distribution is to evenly distribute the flowing melt on the 3.4m wide cross section. The steps of filtering, metering and distributing the molten material can improve product quality, protect production equipment, improve production efficiency, reduce production risks and optimize cost control, as follows:

[0030] Melt filters can remove various impurities in the melt, such as metal particles, fibers, oxides, sand particles, etc. These impurities will affect the purity and performance of the product. Removing them can ensure the smooth spinning process, improve the purity and uniformity of non-woven fabrics, and thus improve product quality. Through precise metering and distribution systems, it can be ensured that each spinning unit receives the same amount of molten material, thereby ensuring the consistency of performance of each part of the non-woven fabric.

[0031] Melt filters help protect production equipment, such as screws, pumps and pipes, from wear and blockage by impurities and particles. This can extend the service life of the equipment and reduce maintenance and replacement costs. Accurate metering and distribution systems can ensure that the molten material is supplied to the spinning unit at a constant speed and pressure, reducing fluctuations and downtime in the production process, thereby improving production efficiency.

[0032] By filtering and removing impurities, the risk of blockage and downtime in the production process can be reduced, and production losses can be reduced. It ensures that each spinning unit gets enough molten material to avoid production interruptions due to insufficient supply.

[0033] Extend equipment life, reduce maintenance and replacement costs, and thus reduce overall production costs. Ensure the stability and efficiency of the production process, reduce production losses and waste, and help optimize cost control.

[0034] The filtration adopts a melt filter with a mesh size of 150 to 250, which can effectively intercept impurities and particles in the melt and ensure the purity of the melt. The filtration can preferably adopt a melt filter with a mesh size of 200. The filter with this mesh size can better filter out impurities (carbon, ash, etc.) in the melt.

[0035] The temperature of the filter and metering pump is 200-270°C, which is conducive to maintaining the fluidity and uniformity of the melt and ensuring that the melt will not solidify or clog during the transportation and metering process. The temperature of the filter and metering pump is preferably 190-250°C. It is worth noting that this temperature is also suitable for the melt pipeline connecting the filtering device (melt filter) and the metering device (metering pump).

[0036] The temperature of the spinning box is 190-250°C. This helps to ensure that the melt maintains stable fluidity and uniformity during the spinning process, and avoids affecting the spinning quality and production efficiency due to temperature fluctuations. Cooling can be performed by quenching air. The quenching air is provided by a cooling air window. The temperature of the quenching air is preferably 8-20°C, the wind speed can be set to 0.8-2.0 m / s, and the pressure can be 400-1200 Pa.

[0037] In some embodiments, the step of mixing the raw materials and extruding and melting them to obtain a molten material comprises:

[0038] A screw extruder is used for extrusion melting, wherein the temperature of the first zone of the screw extruder is 165-240°C, the temperature of the second zone is 180-250°C, the temperature of the third zone is 190-260°C, the temperature of the fourth zone is 190-260°C, the temperature of the fifth zone is 190-260°C, the temperature of the sixth zone is 190-260°C, and the temperature of the seventh zone is 190-260°C. Thus, the temperature should be stable to ensure the full melting of the raw materials. If the temperature is too low, the fluidity of the melt is poor, the mixing is not sufficient, and the equipment will be damaged; if the temperature is too high, the macromolecules are easily cracked, affecting the basic properties of the molecules.

[0039] In some embodiments, the hot rolling forming of the web comprises:

[0040] The hot rolling is carried out by a hot rolling mill, the upper roller temperature of the hot rolling mill is 60-100°C, the lower roller temperature of the hot rolling mill is 60-100°C; the hot rolling pressure is 35-60N / mm; the hot rolling speed is 10-100m / min; the "hot rolling speed" here refers to the running speed of the cloth during the hot rolling process. If the temperature and pressure of the hot rolling are too low, the silk will not be completely melted and cannot be well bonded, while if the temperature and pressure are too high, the silk will be over-melted and form a hard block or the spun cloth will become a film.

[0041] In some embodiments, after the fiber web is hot-rolled, the method further includes cooling the fabric surface at 15-25° C. using a cooling roller.

[0042] In the third aspect, the embodiments of the present application also provide an application of an elastic spunbond non-woven fabric, wherein the elastic spunbond non-woven fabric described in the first aspect and / or the elastic spunbond non-woven fabric prepared by the preparation method described in the second aspect is applied to medical patches and / or medical ointments, base materials for beauty care products, and wiping cloths for electronic products.

[0043] The application of the elastic spunbond nonwoven fabric provided in the embodiments of the present application, the benefits of the application of medical patches and medical ointments: the elastic spunbond nonwoven fabric is used as the base material of medical patches and ointments, and its ingredients are mild and do not irritate the skin, reducing the discomfort during use; the structure of the nonwoven fabric helps the active ingredients in the ointment to quickly penetrate into the subcutaneous tissue and directly reach the lesion, thereby improving the therapeutic effect. Under the guidance of traditional Chinese medicine theory, the elastic spunbond nonwoven fabric can help dredge the meridians, activate the tendons and bones, and effectively relieve inflammation and pain; its high degree of fit ensures that the ointment or patch can fit the skin tightly, reduce movement and shedding, and enhance the effect of use.

[0044] Benefits of beauty care product material application: Soft and comfortable: Elastic spunbond nonwoven fabric is soft and comfortable, suitable for making facial masks, skin care patches and other beauty products, improving the use experience. Water absorption and breathability: The good water absorption and breathability of nonwoven fabrics help keep the skin moisturized while avoiding discomfort caused by excessive moisture. Environmentally friendly and degradable: As a disposable product, elastic spunbond nonwoven fabric is easy to decompose and is environmentally friendly.

[0045] Benefits of using electronic product wiping cloth: Strong decontamination ability: Non-woven fabric has excellent adsorption performance and can easily remove dust and stains on the surface of electronic products. No static electricity, no chemical reaction: Its non-static characteristics avoid static damage that may occur during the wiping process, and at the same time, it does not produce chemical reactions with the coating on the surface of electronic products, ensuring the safety of the product. Soft and does not damage the surface: The soft texture of non-woven fabric avoids scratches or wear on the surface of electronic products during the wiping process. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0047] Figure 1 The present invention provides a schematic diagram of the process of preparing a method for elastic spunbond nonwoven fabric. Figure 1 ;

[0048] Figure 2 The present invention provides a schematic diagram of the process of preparing a method for elastic spunbond nonwoven fabric. Figure 2 . DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] In this application, the term "and / or" describes the association relationship of associated objects, indicating that there may be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. A and B can be singular or plural. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0051] In this application, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can all mean: a, b, c, ab (i.e., a and b), ac, bc, or abc, where a, b, c can be single or multiple, respectively.

[0052] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution, some or all of the steps can be executed in parallel or sequentially, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0053] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0054] The weight of the relevant components mentioned in the embodiment description of the present application can not only refer to the specific content of each component, but also represent the proportional relationship between the weights of the components. Therefore, as long as the content of the relevant components is proportionally enlarged or reduced according to the embodiment description of the present application, it is within the scope disclosed in the embodiment description of the present application. Specifically, the mass described in the embodiment description of the present application can be a mass unit known in the chemical industry such as μg, mg, g, kg, etc.

[0055] The terms "first" and "second" are used only for descriptive purposes to distinguish objects such as substances from each other, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. For example, without departing from the scope of the embodiments of the present application, the first XX may also be referred to as the second XX, and similarly, the second XX may also be referred to as the first XX. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0056] In a first aspect, an embodiment of the present application provides an elastic spunbonded nonwoven fabric, comprising the following raw materials in parts by weight:

[0057] Polypropylene 40-60 parts;

[0058] 40-60 parts of propylene-ethylene copolymer;

[0059] 1 to 8 parts of stabilizer;

[0060] 1 to 6 parts of softener.

[0061] Using polypropylene as the main raw material ensures the basic properties of non-woven fabrics, such as light weight, good softness, strong drainage and air permeability. The addition of propylene-ethylene copolymer is used to improve the elasticity and wear resistance of non-woven fabrics, giving them better physical and mechanical properties. Adding 1 to 8 parts of stabilizer can effectively inhibit the oxidative degradation reaction of polypropylene during processing and use, thereby extending the service life of non-woven fabrics and ensuring stable product performance. Adding 1 to 6 parts of softener can improve the touch and softness of non-woven fabrics, making them more comfortable and easy to process.

[0062] The elastic spunbond nonwoven fabric provided in the embodiment of the present application is prepared by adding a certain amount of propylene-ethylene copolymer, stabilizer and softener to polypropylene, wherein the propylene-ethylene polymer is an elastic crystal with excellent elasticity and viscosity, thereby solving the defect that the stretchability of the nonwoven fabric is not good enough, and the nonwoven fabric has good stretchability in both the longitudinal and transverse directions. The stabilizer and softener solve the problem that the surface of the nonwoven fabric is more sticky due to the addition of the propylene-ethylene polymer, making the fabric roll easy to roll up and unroll. At the same time, the propylene-ethylene polymer also solves the problem that the surface of ordinary nonwoven fabrics is prone to falling fine fluff due to its good viscosity.

[0063] In applications, the average molecular weight of polypropylene may be 3500 to 4500. In other embodiments, the average molecular weight of polypropylene may be 40000 to 90000. The performance and quality of the nonwoven fabric can be ensured.

[0064] In some embodiments, the propylene-ethylene copolymer includes a random copolymer or a block copolymer. Propylene-ethylene copolymer is a synthetic material formed by copolymerization of propylene and ethylene monomers. According to the different copolymerization methods and conditions, it can be divided into two categories: random copolymers and block copolymers. Among them, random copolymers: propylene and ethylene segments are randomly distributed in the polymer main chain. When the ethylene content (mass fraction is 1% to 7%) reaches a certain level, the presence of ethylene inhibits the crystallization of propylene, so that the crystallinity of the random copolymer decreases. Block copolymers: have a clear sequence of propylene and ethylene segments, forming an alternating "block" structure with a certain rigidity and improved impact strength.

[0065] In some embodiments, the propylene-ethylene copolymer includes a random copolymer and a block copolymer, wherein the mass ratio of the random copolymer to the block copolymer is 1:(0.5-1). Optionally, the mass ratio of the random copolymer to the block copolymer is 1:0.5. Optionally, the mass ratio of the random copolymer to the block copolymer is 1:0.75. Preferably, the mass ratio of the random copolymer to the block copolymer is 1:1. Thus, the advantages of the random copolymer and the block copolymer can be effectively combined, namely, the low crystallinity, high transparency, high flexibility and impact resistance of the random copolymer, and the strong rigidity and low temperature toughness of the block copolymer. Moreover, in the above range of ratios, the advantages of both the random copolymer and the block copolymer can be best combined, thereby maximizing the elasticity and viscosity of the propylene-ethylene copolymer.

[0066] In application, the embodiment of the present application does not make special requirements for the selection of softener. The effect of the addition of the softener in the embodiment of the present application is not based on the purpose of increasing the softness of the non-woven fabric as described in the prior art, but to reduce the friction coefficient of the non-woven fabric surface, thereby reducing the adhesion of the fabric surface, making it easier to walk on the fabric surface (such as coiled material). Specifically, the softener includes but is not limited to silicone oil softeners, polyurethane softeners, ester quaternary ammonium salt softeners and natural softeners extracted from vegetable oils and animal fats. In certain embodiments, the softener can be polysiloxane, dimethyl silicone oil, quaternary ammonium salt compounds and fatty amine salts. Among them, the quaternary ammonium salt compound has stable softness, small dosage, outstanding biodegradability, green and environmental protection, and has multiple functions such as anti-yellowing, sterilization and disinfection.

[0067] In application, stabilizer, also known as antioxidant, is not particularly limited in the embodiments of the present application. Generally, some antioxidants used in fabrics can be used (ordinary non-woven fabrics are not added with antioxidants). It is worth noting that in the embodiments of the present application, in order to avoid the phenomenon that the cloth surface turns yellow and red in the non-woven fabrics made of polypropylene or polyethylene in the prior art, stabilizers are added. Thus, antioxidants can prevent the non-woven fabric material from aging due to oxidation, thereby extending the service life of the non-woven fabric, reducing the number of replacements, and reducing the cost of use. Non-woven fabrics treated with antioxidants can maintain the original performance stability during long-term use, avoiding the decline in material quality and performance. Antioxidants can effectively protect plastic films from being oxidized by air, significantly improve the heat resistance of plastic resins, thereby ensuring the quality and performance of non-woven fabrics. Specifically, it includes but is not limited to light stabilizers, hydroxylamine antioxidants and hindered phenol antioxidants; wherein the light stabilizer is a compound that can absorb ultraviolet rays, which can effectively slow down the aging rate of non-woven fabrics under sunlight exposure. Hydroxylamine antioxidants: such as IRGASTAB FS042, are phenol-free antioxidants with good color protection, high compatibility, low volatility and stable high temperature storage. In some embodiments, stabilizers include inorganic pigments such as carbon black, titanium oxide, zinc oxide, titanium dioxide and zinc barium, as well as phthalocyanine blue, phthalocyanine green, o-hydroxybenzophenone, benzotriazole, salicylate, triazine, substituted acrylonitrile, etc.

[0068] In some embodiments, the elastic spunbonded nonwoven fabric further comprises the following raw materials in parts by weight:

[0069] Masterbatch 0.5-2 parts;

[0070] Functional masterbatch 1 to 5 parts.

[0071] Masterbatch is a pigment or pigment premix used to change the appearance and color of non-woven fabrics. They usually exist in granular or powdered form and can be mixed with non-woven materials to change their color and effect. Functional masterbatch is a concentrate of various plastic additives, which are usually added in the form of masterbatch to improve the functionality of non-woven fabrics. Functional masterbatches include flame retardant masterbatches, antibacterial masterbatches, antistatic masterbatches, hydrophilic functional masterbatches, negative ion functional masterbatches, etc. Among them, flame retardant functional masterbatch: improves the flame retardant properties of non-woven fabrics and is often used in clothing, construction, automobiles and other fields. Antibacterial functional masterbatch: gives non-woven fabrics antibacterial properties and is suitable for medical and health fields. Antistatic functional masterbatch: reduces the surface resistivity of non-woven fabrics and eliminates static electricity. It is often used in electronic product packaging, dust-free workshops, etc. Hydrophilic functional masterbatch: improves the hydrophilicity of non-woven fabrics and is suitable for baby diapers, facial masks, medical wound patches, etc. Negative ion functional masterbatch: enables non-woven fabrics to have the ability to release negative ions, which helps to improve air quality and is often used in home decoration, air purification and other fields. In the embodiment of the present application, during the production process of the non-woven fabric, the corresponding functional masterbatch is added to the non-woven fabric raw material according to the required functionality, and the non-woven fabric product with specific functionality is made through the corresponding processing equipment.

[0072] In some embodiments, the melting point of the mixture of polypropylene and the propylene-ethylene copolymer is 80 to 180°C;

[0073] The melt index of the mixture of polypropylene and propylene-ethylene copolymer is 20 to 88 g / 10 min.

[0074] Since the amount of stabilizer, softener, masterbatch and functional masterbatch added is small, the melting point and melt index of the raw material can be regarded as the melting point and melt index of the mixture of polypropylene and propylene-ethylene copolymer. The melting point is preferably 80-180°C. The hot-flying non-woven fabric is prepared by heating the polymer fiber at high temperature to fuse it into a mesh structure. Therefore, the melting point of hot-flying non-woven fabric is usually high because the melting point of its raw material polymer fiber is very high. For example, the melting point of polypropylene fiber is about 160°C, so the melting point of hot-flying non-woven fabric is generally above 150°C. Unlike hot-flying non-woven fabric, cold-flying non-woven fabric is manufactured by cooling molding, and the polymer fiber is not subjected to high-temperature thermal treatment during the manufacturing process. The melting point of cold-flying non-woven fabric is low, usually around 110°C. The melt index is preferably 20-1800g / 10min. The size of the melt index directly affects the preparation process and product performance of melt-blown non-woven fabrics. The larger the melt index, the better the melt fluidity of the material, and the more suitable it is for the melt-blown process with poor drafting. In the embodiments of the present application, nonwoven fabrics for different purposes have different requirements for melt index. For example, sanitary materials usually use spunbond polypropylene and propylene-ethylene copolymer with a melt index of 35-40 g / 10min and meltblown polypropylene and propylene-ethylene copolymer with a melt index of 1200-1500 g / 10min; medical products use spunbond polypropylene and propylene-ethylene copolymer with a melt index of 40 g / 10min and meltblown polypropylene and propylene-ethylene copolymer with a melt index of 1300-1500 g / 10min; and industrial products use spunbond polypropylene and propylene-ethylene copolymer with a melt index of 33-35 g / 10min.

[0075] In a second aspect, an embodiment of the present application provides a method for preparing an elastic spunbonded nonwoven fabric, comprising the following steps:

[0076] S10, providing the raw materials described in the first aspect;

[0077] S20, mixing the raw materials, extruding and melting them to obtain a molten material;

[0078] S30, spinning the molten material to obtain a filament bundle;

[0079] S40, drawing and laying the filament bundle after cooling to form a fiber web;

[0080] S50, hot rolling the fiber web to obtain an elastic spunbonded nonwoven fabric.

[0081] The preparation method of the elastic spunbond nonwoven fabric provided in the embodiment of the present application, wherein the mixing and extrusion melting process ensures the uniformity and melting effect of the raw materials, and provides a good raw material basis for the subsequent spinning process. The processes such as spinning, drafting, and laying are continuous and efficient, eliminating the cumbersome intermediate process, reducing production costs, and improving market competitiveness. The hot rolling forming process uses high temperature and pressure to bond the fibers to each other to form a uniform and firm fiber web, further improving the strength and durability of the nonwoven fabric. The elastic spunbond nonwoven fabric finally obtained has excellent elasticity, softness, air permeability, and wear resistance, and is suitable for home decoration, industrial industry, medical care industry, agricultural environmental protection industry and other fields. In addition, the preparation process does not involve the use of toxic and harmful chemicals, which further improves the environmental protection of the product. And the preparation process eliminates the cumbersome intermediate process, reduces production costs, and the price of the raw materials used is relatively low, so that the cost of the final product is low and the market competitiveness is strong.

[0082] In step S10, in the application, the raw materials described in the first aspect are 40-60 parts of polypropylene; 40-60 parts of propylene-ethylene copolymer; 1-8 parts of stabilizer; 1-6 parts of softener, or 0.5-2 parts of masterbatch; and 1-5 parts of functional masterbatch.

[0083] In step S20, mixing the raw materials, extruding and melting to obtain a molten material includes: using a screw extruder for extrusion melting, the temperature of the first zone of the screw extruder is 165-240°C, the temperature of the second zone is 180-250°C, the temperature of the third zone is 190-260°C, the temperature of the fourth zone is 190-260°C, the temperature of the fifth zone is 190-260°C, the temperature of the sixth zone is 190-260°C, and the temperature of the seventh zone is 190-260°C. Therefore, the temperature stability can ensure the full melting of the raw materials. If the temperature is too low, the fluidity of the melt is poor, the mixing is not sufficient, and the equipment will be damaged; if the temperature is too high, the macromolecules are easily cracked, affecting the basic properties of the molecules.

[0084] After step S20 and after step S30, the molten material is filtered, metered and distributed; the distribution is completed by the spinning manifold. The main function of the distribution is to evenly distribute the flowing melt on the 3.4m width cross section. The steps of filtering, metering and distributing the molten material can improve product quality, protect production equipment, improve production efficiency, reduce production risks and optimize cost control, as follows:

[0085] Melt filters can remove various impurities in the melt, such as metal particles, fibers, oxides, sand particles, etc. These impurities will affect the purity and performance of the product. Removing them can ensure the smooth spinning process, improve the purity and uniformity of non-woven fabrics, and thus improve product quality. Through precise metering and distribution systems, it can be ensured that each spinning unit receives the same amount of molten material, thereby ensuring the consistency of performance of each part of the non-woven fabric.

[0086] Melt filters help protect production equipment, such as screws, pumps and pipes, from wear and blockage by impurities and particles. This can extend the service life of the equipment and reduce maintenance and replacement costs. Accurate metering and distribution systems can ensure that the molten material is supplied to the spinning unit at a constant speed and pressure, reducing fluctuations and downtime in the production process, thereby improving production efficiency.

[0087] By filtering and removing impurities, the risk of blockage and downtime in the production process can be reduced, and production losses can be reduced. It ensures that each spinning unit gets enough molten material to avoid production interruptions due to insufficient supply.

[0088] Extend equipment life, reduce maintenance and replacement costs, and thus reduce overall production costs. Ensure the stability and efficiency of the production process, reduce production losses and waste, and help optimize cost control.

[0089] In the application, the filtration adopts a melt filter with a mesh size of 150 to 250; it can effectively intercept impurities and particles in the melt to ensure the purity of the melt. The filtration can preferably adopt a melt filter with a mesh size of 200. The filter with this mesh size can better filter out impurities (carbon, ash, etc.) in the melt.

[0090] In application, the temperature of the filter and metering pump is 200-270℃, which is conducive to maintaining the fluidity and uniformity of the melt and ensuring that the melt will not solidify or clog during transportation and metering. The temperature of the filter and metering pump is preferably 190-250℃. It is worth noting that this temperature is also suitable for the melt pipeline connecting the filtering equipment (melt filter) and the metering equipment (metering pump).

[0091] In the application, the temperature of the spinning box is 190-250°C. This helps to ensure that the melt maintains stable fluidity and uniformity during the spinning process, and avoids affecting the spinning quality and production efficiency due to temperature fluctuations. Cooling can be carried out by quenching air. The quenching air is provided by the cooling air window. The temperature of the quenching air is preferably 8-20°C, the wind speed can be set to 0.8-2.0 m / s, and the pressure can be 400-1200 Pa.

[0092] In step S40, the filament bundle is stretched and laid after cooling to form a fiber web. The function of stretching is to arrange the polymer crystals of the filaments neatly, improve the orientation degree of the macromolecules in the filaments along the axial direction, and produce certain mechanical properties, thereby obtaining fibers with certain orientation, mechanical properties and certain fineness, and the fibers have certain strength, wear resistance and appropriate elongation. The stretching can be performed by a slit airflow stretcher. The stretching rate is preferably but not limited to 1500 to 3500 meters per minute. Laying can be performed by a web-forming machine. The net curtain rate of the web-forming machine is preferably 10 to 300 m / min. Of course, in order to facilitate the fiber web to be better attached to the web-forming machine during the laying process, a suction device can be provided, and the suction device can also exhaust excess wind.

[0093] In step S50, hot rolling forming the fiber web includes:

[0094] Hot rolling is carried out in a hot rolling mill, the upper roller temperature of the hot rolling mill is 60-100℃, the lower roller temperature of the hot rolling mill is 60-100℃; the hot rolling pressure is 35-60N / mm; the hot rolling rate is 10-100m / min; here "hot rolling rate" refers to the running rate of the cloth during the hot rolling process. If the temperature and pressure of hot rolling are too low, the silk will not be completely melted and cannot be well bonded, while if the temperature and pressure are too high, the silk will be over-melted and form a hard lump or the spun cloth will become a film.

[0095] In some embodiments, after the fiber web is hot-rolled, the method further comprises cooling the fabric surface at 15-25° C. using a cooling roller.

[0096] In some embodiments, the elastic spunbonded nonwoven fabric provided in the present application can also be Figure 2 The process is carried out in production and manufacturing. Figure 2 The specific production process of the elastic spunbond nonwoven fabric provided by the present application in the production workshop is shown in the figure. The nonwoven fabric produced according to the process has good elasticity and mechanical properties and can meet the production needs.

[0097] In the third aspect, the embodiments of the present application also provide an application of an elastic spunbond non-woven fabric, wherein the elastic spunbond non-woven fabric described in the first aspect and / or the elastic spunbond non-woven fabric prepared by the preparation method described in the second aspect is applied to medical patches and / or medical ointments, base materials for beauty care products, and wiping cloths for electronic products.

[0098] The application of the elastic spunbond nonwoven fabric provided in the embodiments of the present application, the benefits of the application of medical patches and medical ointments: the elastic spunbond nonwoven fabric is used as the base material of medical patches and ointments, and its ingredients are mild and do not irritate the skin, reducing the discomfort during use; the structure of the nonwoven fabric helps the active ingredients in the ointment to quickly penetrate into the subcutaneous tissue and directly reach the lesion, thereby improving the therapeutic effect. Under the guidance of traditional Chinese medicine theory, the elastic spunbond nonwoven fabric can help dredge the meridians, activate the tendons and bones, and effectively relieve inflammation and pain; its high degree of fit ensures that the ointment or patch can fit the skin tightly, reduce movement and shedding, and enhance the effect of use.

[0099] Benefits of beauty care product material application: Soft and comfortable: Elastic spunbond nonwoven fabric is soft and comfortable, suitable for making facial masks, skin care patches and other beauty products, improving the use experience. Water absorption and breathability: The good water absorption and breathability of nonwoven fabrics help keep the skin moisturized while avoiding discomfort caused by excessive moisture. Environmentally friendly and degradable: As a disposable product, elastic spunbond nonwoven fabric is easy to decompose and is environmentally friendly.

[0100] Benefits of using electronic product wiping cloth: Strong decontamination ability: Non-woven fabric has excellent adsorption performance and can easily remove dust and stains on the surface of electronic products. No static electricity, no chemical reaction: Its non-static characteristics avoid static damage that may occur during the wiping process, and at the same time, it does not produce chemical reactions with the coating on the surface of electronic products, ensuring the safety of the product. Soft and does not damage the surface: The soft texture of non-woven fabric avoids scratches or wear on the surface of electronic products during the wiping process.

[0101] The following describes the invention in conjunction with specific embodiments.

[0102] Example 1

[0103] The present invention provides an elastic spunbond nonwoven fabric and a preparation method thereof, wherein the preparation method comprises the following steps:

[0104] S10, providing 40 parts of polypropylene, 40 parts of propylene-ethylene copolymer, 1 part of antioxidant, and 1 part of softener;

[0105] S20, mixing the raw materials in step S10, feeding them into a screw extruder through a feeding device, and setting the temperature of zone 1 of the screw extruder to preferably 165°C; the temperature of zone 2 to preferably 190°C; the temperature of zone 3 to preferably 210°C; the temperature of zone 4 to preferably 210°C; the temperature of zone 5 to preferably 210°C; the temperature of zone 6 to preferably 210°C; the temperature of zone 7 to preferably 210°C, and obtaining a molten material through a screw extruder; filtering the molten material through a 200-mesh melt filter, and then entering a metering pump through a 210°C melt pipe for metering, and then distributing it through a spinning manifold, wherein the temperature of the filter and metering pumps is 220°C, and the temperature of the spinning manifold is 220°C;

[0106] S30, spinning the allocated molten material through a spinning assembly at 220°C to form a filament bundle, the mesh number of the filter screen of the spinning assembly is 160 meshes. The filament bundle is cooled by quenching air at 12°C and 900pa pressure, and the wind speed is set to 2m / s;

[0107] S40, the cooled tow is drawn by a slit air drafter at a drawing rate of 1500 m / min, and after drawing, a web-forming machine is used for laying the web, and the web curtain rate of the web-forming machine is 60 m / min;

[0108] S50. The fiber web obtained by laying the web is hot-rolled by a hot rolling mill. The upper roller temperature of the hot rolling mill is 110°C, the lower roller temperature of the hot rolling mill is 108°C, the hot rolling pressure is 110N / mm, and the cloth travel speed is 70m / min. After hot rolling, the cloth surface is cooled at 25°C by a cooling roller, and finally a winder is used for winding, slitting and packaging to obtain the finished elastic spunbond non-woven fabric.

[0109] Example 2

[0110] The present invention provides an elastic spunbond nonwoven fabric and a preparation method thereof, wherein the preparation method comprises the following steps:

[0111] S10, providing 60 parts of propylene-ethylene copolymer, 40 parts of polypropylene, 3 parts of stabilizer and 5 parts of softener;

[0112] S20, mix the raw materials in step S10, feed them into the screw extruder through the feeding device, set the temperature of zone 1 to 165°C, the temperature of zone 2 to 190°C, the temperature of zone 3 to 210°C, the temperature of zone 4 to 210°C, the temperature of zone 5 to 210°C, the temperature of zone 6 to 210°C, and the temperature of zone 7 to 210°C, and obtain the molten material through the screw extruder; filter the molten material through a 200-mesh melt filter, and then enter the metering pump through a 210°C melt pipe for metering, and then distribute it through the spinning manifold. The temperature of the above-mentioned filtration and metering pumps is 220°C, and the temperature of the spinning manifold is 220°C.

[0113] S30, spinning the allocated molten material through a spinning assembly at 220° C. to form a filament bundle; the mesh number of the component filter of the spinning assembly is 160 mesh; cooling the above filament bundle through quenching wind at 12° C. and 900 Pa pressure, and the wind speed is set to 1.8 m / s;

[0114] S40, the cooled tow is drawn by a slit air drafter at a drawing rate of 2000 m / min; after drawing, a web-forming machine is used for laying the web, and the web curtain rate of the web-forming machine is 70 m / min;

[0115] S50, the fiber web obtained by laying the web is hot-rolled by a hot rolling mill, the upper roller temperature of the hot rolling mill is 110°C, the lower roller temperature of the hot rolling mill is 108°C, the hot rolling pressure is 110N / mm, the cloth travel speed is 70m / min, the cooling roller is used to cool the cloth surface at 15°C, and finally a winder is used for winding, slitting and packaging to obtain the finished elastic spunbond non-woven fabric.

[0116] Example 3

[0117] The present invention provides an elastic spunbond nonwoven fabric and a preparation method thereof, wherein the preparation method comprises the following steps:

[0118] S10, providing 60 parts of propylene-ethylene copolymer, 40 parts of polypropylene, 3 parts of stabilizer and 5 parts of softener;

[0119] S20, mixing the raw materials in step S10, feeding them into a screw extruder through a feeding device, and setting the temperature of zone 1 to 165°C, the temperature of zone 2 to 190°C, the temperature of zone 3 to 210°C, the temperature of zone 4 to 210°C, the temperature of zone 5 to 210°C, the temperature of zone 6 to 210°C, and the temperature of zone 7 to 210°C, and obtaining a molten material through a screw extruder; filtering the molten material through a 200-mesh melt filter, and then entering a metering pump through a 210°C melt pipe for metering, and then distributing it through a spinning manifold, the temperature of the above filtration and metering is 220°C, and the temperature of the spinning manifold is 220°C;

[0120] S30, spinning the allocated molten material through a spinning assembly at 260° C. to form a filament bundle, the mesh number of the assembly filter of the spinning assembly is 160 mesh, and cooling the filament bundle through a quenching wind at 14° C. and a pressure of 1035 Pa, with the wind speed set at 2 m / s;

[0121] S40, the cooled tow is drawn by a slit air drafter at a drawing rate of 3000 m / min, and after drawing, a web-forming machine is used for laying the web, and the web curtain rate of the web-forming machine is 47 m / min;

[0122] S50, the fiber web obtained by laying the web is hot-rolled by a hot rolling mill, the upper roller temperature of the hot rolling mill is 112°C, the lower roller temperature of the hot rolling mill is 110°C, the hot rolling pressure is 110N / mm, the cloth travel speed is 47m / min, and after hot rolling, the cloth surface is cooled at 20°C by a cooling roller, and finally a winder is used for winding, slitting and packaging to obtain a finished elastic spunbond non-woven fabric.

[0123] Embodiment 4 to Embodiment 7

[0124] The method is basically the same as Example 1, except that the amount of each raw material added is shown in the following table:

[0125]

[0126] Wherein, PP refers to polypropylene, and PEC refers to propylene-ethylene copolymer. In Examples 1 to 3, the ratio of random copolymer to block copolymer in PEC is 1:1, the PEC in Example 4 has only random copolymers, the PEC in Example 5 has only block copolymers, the ratio of random copolymer to block copolymer in PEC in Example 6 is 1:0.5, and the ratio of random copolymer to block copolymer in PEC in Example 7 is 1:0.75.

[0127] Performance Testing

[0128] The elastic spunbonded nonwoven fabrics obtained in Examples 1 to 7 and the conventional nonwoven fabrics (DSN40 and DSN25) available on the market were used as Comparative Examples 1 and 2. The tensile strength and elongation at break were tested using FZ / T 60003-91 (the test was performed on the product with a tensile strength of 100 g / m 2 Conditions), as shown in the following table:

[0129]

[0130] Results Analysis

[0131] As shown in the table above, the elastic spunbonded nonwoven fabric provided in the examples of the present application achieved the following excellent results:

[0132] 1. The mixture of propylene-ethylene copolymer and polypropylene provides a highly elastic resin system; the non-woven fabric provided in the embodiment of the present application optimizes the raw material formula so that the fabric surface has a relatively excellent transverse elongation at break, that is, the elastic fabric provided in the embodiment of the present application is elastic in the transverse direction and inelastic in the longitudinal direction, while the conventional non-woven fabrics available on the market are inelastic in both the longitudinal and transverse directions.

[0133] 2. It can effectively combine the advantages of random copolymer and block copolymer in propylene-ethylene copolymer, that is, the low crystallinity, high transparency, high flexibility and impact resistance of random copolymer, and the strong rigidity and low-temperature toughness of block copolymer. Moreover, in the above range of proportions, the advantages of random copolymer and block copolymer can be best combined, so as to maximize the elasticity and viscosity of propylene-ethylene copolymer.

[0134] 3. The preparation process does not involve the use of toxic and harmful chemicals, which further improves the environmental friendliness of the product. The preparation process also eliminates the cumbersome intermediate process, reduces production costs, and uses relatively low-priced raw materials, which makes the final product cost lower and more competitive in the market.

[0135] 4. The elastic spunbond nonwoven fabric provided in the embodiments of the present application can be widely used in medical products (medical patches and ointments), beauty care product materials, and wiping materials for electronic products.

[0136] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An elastic spunbonded nonwoven fabric, characterized in that: The invention comprises the following raw materials in parts by weight: Polypropylene 40-60 parts; 40-60 parts of propylene-ethylene copolymer; 1 to 8 parts of stabilizer; 1 to 6 parts of softener.

2. The elastic spunbonded nonwoven fabric according to claim 1, characterized in that: The propylene-ethylene copolymer includes a random copolymer or a block copolymer.

3. The elastic spunbonded nonwoven fabric according to claim 1, characterized in that: The propylene-ethylene copolymer includes a random copolymer and a block copolymer, wherein the mass ratio of the random copolymer to the block copolymer is 1:(0.5-1).

4. The elastic spunbonded nonwoven fabric according to claim 1, characterized in that: The following raw materials are also included in weight: Masterbatch 0.5-2 parts; Functional masterbatch 1 to 5 parts.

5. The elastic spunbonded nonwoven fabric according to any one of claims 1 to 4, characterized in that: The melting point of the mixture of the polypropylene and the propylene-ethylene copolymer is 80 to 180° C.; The melt index of the mixture of the polypropylene and the propylene-ethylene copolymer is 20 to 1800 g / 10 min.

6. A method for preparing an elastic spunbonded nonwoven fabric, characterized in that: The following steps are involved: Providing a raw material according to any one of claims 1 to 5; Mixing the raw materials, extruding and melting them to obtain a molten material; Spinning the molten material to obtain a filament bundle; After cooling, the filament bundles are stretched and laid to form a fiber web; The fiber web is subjected to hot rolling to obtain an elastic spunbonded nonwoven fabric.

7. The preparation method according to claim 6, characterized in that: Before spinning the molten material to obtain the filament bundle, the method further includes: filtering, metering and distributing the molten material; Wherein, the filtration adopts a melt filter screen with a mesh size of 150 to 250; The temperature of the filtering and metering pumps is 190-250°C; The temperature of the spinning box is 190-250°C.

8. The preparation method according to claim 6, characterized in that: The step of mixing the raw materials and extruding and melting them to obtain a molten material comprises: A screw extruder is used for extrusion melting, wherein the temperature of zone one of the screw extruder is 165-240°C, the temperature of zone two is 180-250°C, the temperature of zone three is 190-260°C, the temperature of zone four is 190-260°C, the temperature of zone five is 190-260°C, the temperature of zone six is ​​190-260°C, and the temperature of zone seven is 190-260°C.

9. The preparation method according to claim 6, characterized in that: The hot rolling forming of the fiber web comprises: The hot rolling is carried out by a hot rolling mill, the upper roll temperature of the hot rolling mill is 60-100° C., and the lower roll temperature of the hot rolling mill is 60-100° C.; And / or, the hot rolling pressure is 35-60N / mm; And / or, the hot rolling rate is 10 to 100 m / min; And / or, after the fiber web is hot-rolled, the method further comprises cooling the fabric surface at 15-25° C. using a cooling roller.

10. An application of an elastic spunbonded nonwoven fabric, characterized in that: The elastic spunbond nonwoven fabric described in claims 1 to 5 and / or the elastic spunbond nonwoven fabric prepared by the preparation method described in any one of claims 6 to 9 is applied to medical patches and / or medical ointments, beauty care product materials, and wiping cloths for electronic products.

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