Antistatic sms nonwoven fabric and method for manufacturing the same
By adding chitosan-modified carbon nanotubes and graphene oxide to the outer layer of SMS nonwoven fabric, along with lubricants and antistatic agents, the static electricity problem of SMS nonwoven fabric was solved, the durability and adhesion of antistatic properties were improved, and the protective performance of the nonwoven fabric was enhanced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 山东华业无纺布有限公司
- Filing Date
- 2024-03-21
- Publication Date
- 2026-06-02
Abstract
Description
Technical Field
[0001] This application relates to the technical field of nonwoven fabrics, and in particular to an antistatic SMS nonwoven fabric and its preparation method. Background Technology
[0002] SMS nonwoven fabric is a type of composite nonwoven fabric widely used in disposable medical items, such as disposable surgical gowns, shoe covers, and gloves. It boasts advantages such as high strength, excellent protective performance, and being non-toxic and odorless. However, SMS nonwoven fabric is prone to static electricity during actual production and use. Static electricity can damage precision medical instruments and cause explosions of flammable materials, potentially posing hazards to medical personnel and patients. Therefore, its application in the medical industry is limited. Current products primarily achieve antistatic properties by impregnating SMS nonwoven fabric with an antistatic agent solution. However, the bonding between SMS nonwoven fabric and the antistatic agent is poor, resulting in poor durability of the antistatic properties on the SMS nonwoven fabric surface. The antistatic ability gradually decreases during storage and use, affecting the lifespan of SMS nonwoven medical products. Summary of the Invention
[0003] To improve the durability of the antistatic properties of SMS nonwoven fabric, this application provides an antistatic SMS nonwoven fabric and its preparation method.
[0004] Firstly, this application provides an antistatic SMS nonwoven fabric, which adopts the following technical solution:
[0005] An antistatic SMS nonwoven fabric includes an intermediate layer and an outer layer, wherein the intermediate layer is located between two adjacent outer layers, and an antistatic layer is disposed on the outer layer; the raw material of the outer layer includes the following components in parts by weight: 95-100 parts of polypropylene, 1-5 parts of lubricant, and 1-5 parts of filler; the raw material of the filler includes chitosan, carbon nanotubes, and graphene oxide.
[0006] By adopting the above technical solution, chitosan is used to modify carbon nanotubes and graphene oxide, thereby improving the dispersion performance of carbon nanotubes and graphene oxide. This allows carbon nanotubes and graphene oxide to be uniformly dispersed in the outer layer, forming a continuous conductive layer. Furthermore, the use of a lubricant reduces friction, resulting in better antistatic properties of the outer layer. In addition, the addition of fillers and lubricants to the raw materials of the outer layer in this application improves the durability of the antistatic properties of the nonwoven fabric surface.
[0007] In one specific implementation, the method for preparing the filler includes the following steps:
[0008] Carbon nanotubes and graphene oxide are dispersed in water to form a mixed dispersion.
[0009] Add chitosan to an aqueous acetic acid solution, stir until the chitosan is dissolved, and obtain a chitosan solution.
[0010] The mixture and dispersion were added to the chitosan solution and stirred until homogeneous to obtain the stock solution.
[0011] Glutaraldehyde was added to the stock solution, stirred evenly, allowed to stand, sodium hydroxide solution was added, the solution was soaked, filtered, washed, dried, and ground to obtain the filler.
[0012] By adopting the above technical solution, carbon nanotubes and graphene oxide are first dispersed to obtain a mixed dispersion. Then, the mixed dispersion is added to a chitosan solution to obtain a stock solution. Finally, glutaraldehyde is added, stirred, and allowed to stand. The solution is then soaked in sodium hydroxide solution, filtered, washed, dried, and ground to obtain a filler with good dispersion performance.
[0013] In one specific implementation, the mass fraction of carbon nanotubes in the mixture dispersion is 2%-3%; the mass fraction of graphene oxide in the mixture dispersion is 1%-2%; the mass fraction of chitosan in the chitosan solution is 0.1%-0.3%; and the weight ratio of the mixture dispersion to the chitosan solution in the stock solution is 1:(8-9).
[0014] By adopting the above technical solution, the ratio of carbon nanotubes, graphene oxide, and chitosan is further limited, which allows chitosan to better modify carbon nanotubes and graphene oxide, thereby improving the performance of the prepared filler.
[0015] In one specific implementation scheme, the raw materials of the antistatic layer include 95-100 parts water, 0.1-0.3 parts penetrant, and 0.3-0.5 parts antistatic agent.
[0016] By adopting the above technical solution and utilizing the penetrant, the antistatic agent is better loaded onto the nonwoven fabric, thereby improving the antistatic performance of the nonwoven fabric.
[0017] In one specific implementation, the antistatic agent comprises a mixture of bis(β-hydroxyethyl)cocoamine and an anionic silicone antistatic agent.
[0018] By adopting the above technical solution, the combination of bis(β-hydroxyethyl)cocoamine and negative ionic silicone antistatic agent enables nonwoven fabric to have better antistatic properties. Furthermore, the negative charge of the negative ions in the negative ionic silicone antistatic agent can attract the positive charge in chitosan, thereby improving the adhesion performance of the negative ionic silicone antistatic agent.
[0019] In one specific implementation, the penetrant comprises hexadecyltrimethylammonium bromide.
[0020] In one specific implementation, the lubricant includes one or more of stearic acid alcohol, magnesium stearate, and paraffin wax.
[0021] Secondly, this application provides a method for preparing antistatic SMS nonwoven fabric, which adopts the following technical solution: A method for preparing antistatic SMS nonwoven fabric includes the following steps:
[0022] Outer layer preparation: Polypropylene, lubricant and filler are stirred and mixed evenly to obtain a mixture. Part of the mixture is then subjected to extrusion melting, spinning and spinning, cold air treatment, stretching and shaping, and fiber separation to form the first fiber web, which is the outer layer.
[0023] Composite: The middle layer and the outer layer are adsorbed to obtain the second fiber web. The remaining mixture is extruded and melted, spun and spun, treated with cold air process, stretched and shaped, and separated into fibers to form the third fiber web, which is another outer layer. Then the third fiber web is adsorbed onto the second fiber web and hot-pressed to obtain the semi-finished product.
[0024] Antistatic treatment: Mix water, penetrant, and antistatic agent evenly to obtain a treatment solution. Immerse the semi-finished product in the treatment solution, remove it, and dry it to obtain SMS non-woven fabric.
[0025] By adopting the above technical solution, polypropylene, lubricant and filler are first stirred and mixed evenly to obtain a mixture. Then, part of the mixture is made into a first fiber web and then laminated into an intermediate layer. Next, the remaining mixture is made into a third fiber web and laminated again. After hot pressing, a semi-finished product is obtained. Finally, the semi-finished product is treated with antistatic agents to obtain SMS non-woven fabric with durable antistatic properties.
[0026] In one specific implementation, the intermediate layer comprises meltblown nonwoven fabric.
[0027] In summary, this application includes at least one of the following beneficial technical effects:
[0028] 1. In this application, chitosan is used to modify carbon nanotubes and graphene oxide, which improves the dispersion performance of carbon nanotubes and graphene oxide, so that carbon nanotubes and graphene oxide are uniformly dispersed in the outer layer, forming a continuous conductive layer. Then, a lubricant is used to reduce friction, thereby giving the outer layer good antistatic properties. In addition, in this application, fillers and lubricants are added to the raw materials of the outer layer, which improves the durability of the antistatic properties of the nonwoven fabric surface.
[0029] 2. In this application, the combination of bis(β-hydroxyethyl)cocoamine and anionic silicone antistatic agent is used to make the nonwoven fabric have better antistatic properties. Furthermore, the negative charge of the negative ions in the anionic silicone antistatic agent can attract the positive charge in chitosan, thereby improving the adhesion performance of the anionic silicone antistatic agent.
[0030] 3. The method in this application involves first mixing polypropylene, lubricant, and filler evenly to obtain a mixture, then forming a portion of the mixture into a first fiber web, then laminating an intermediate layer, then forming the remaining mixture into a third fiber web, laminating again, and hot-pressing to obtain a semi-finished product, and finally subjecting the semi-finished product to antistatic treatment to obtain a durable antistatic SMS nonwoven fabric. Detailed Implementation
[0031] The present application will be further described in detail below with reference to the embodiments.
[0032] All raw materials used in the embodiments are commercially available. The lubricant includes, but is not limited to, one or more of stearic acid alcohol, magnesium stearate, and paraffin wax, with magnesium stearate being preferred in this application.
[0033] Preparation Example
[0034] Preparation Example 1
[0035] Preparation Example 1 provides a method for preparing a packing material, comprising the following steps:
[0036] Carbon nanotubes and graphene oxide were added to water and ultrasonically dispersed for 30 minutes to form a mixed dispersion; the mass fraction of carbon nanotubes in the mixed dispersion was 2%; the mass fraction of graphene oxide in the mixed dispersion was 1%.
[0037] Chitosan was added to a 1% (v / v) aqueous solution of acetic acid and stirred until dissolved to obtain a chitosan solution; wherein the mass fraction of chitosan in the chitosan solution was 0.1%;
[0038] The mixture dispersion was added to the chitosan solution and stirred until homogeneous to obtain the stock solution; wherein the weight ratio of the mixture dispersion to the chitosan solution in the stock solution was 1:8.
[0039] Glutaraldehyde was added to the stock solution, stirred for 50 min, and allowed to stand for 9 h. An appropriate amount of 0.1 mol / L sodium hydroxide solution was added and the mixture was soaked until it became gel-like. The mixture was then filtered, washed, dried, and ground to obtain the filler. The weight ratio of glutaraldehyde to chitosan was 8:5.2.
[0040] Preparation Example 2
[0041] Preparation Example 2 provides a method for preparing a packing material, comprising the following steps:
[0042] Carbon nanotubes and graphene oxide were added to water and ultrasonically dispersed for 30 minutes to form a mixed dispersion; the mass fraction of carbon nanotubes in the mixed dispersion was 2.5%; the mass fraction of graphene oxide in the mixed dispersion was 1.5%.
[0043] Chitosan was added to a 1% (v / v) aqueous solution of acetic acid and stirred until dissolved to obtain a chitosan solution; wherein the mass fraction of chitosan in the chitosan solution was 0.2%;
[0044] The mixture dispersion was added to the chitosan solution and stirred until homogeneous to obtain the stock solution; wherein the weight ratio of the mixture dispersion to the chitosan solution in the stock solution was 1:8.5.
[0045] Glutaraldehyde was added to the stock solution, stirred for 50 min, and allowed to stand for 9 h. An appropriate amount of 0.1 mol / L sodium hydroxide solution was added and the mixture was soaked until it became gel-like. The mixture was then filtered, washed, dried, and ground to obtain the filler. The weight ratio of glutaraldehyde to chitosan was 8:5.2.
[0046] Preparation Example 3
[0047] Preparation Example 3 provides a method for preparing a packing material, comprising the following steps:
[0048] Carbon nanotubes and graphene oxide were added to water and ultrasonically dispersed for 30 minutes to form a mixed dispersion; the mass fraction of carbon nanotubes in the mixed dispersion was 3%; the mass fraction of graphene oxide in the mixed dispersion was 2%.
[0049] Chitosan was added to a 1% (v / v) aqueous solution of acetic acid and stirred until dissolved to obtain a chitosan solution; wherein the mass fraction of chitosan in the chitosan solution was 0.3%;
[0050] The mixture dispersion was added to the chitosan solution and stirred until homogeneous to obtain the stock solution; wherein the weight ratio of the mixture dispersion to the chitosan solution in the stock solution was 1:9.
[0051] Glutaraldehyde was added to the stock solution, stirred for 50 min, and allowed to stand for 9 h. An appropriate amount of 0.1 mol / L sodium hydroxide solution was added and the mixture was soaked until it became gel-like. The mixture was then filtered, washed, dried, and ground to obtain the filler. The weight ratio of glutaraldehyde to chitosan was 8:5.2.
[0052] Preparation Example 4
[0053] The difference between Preparation Example 4 and Preparation Example 1 is that carbon nanotubes were added to water and ultrasonically dispersed for 30 minutes to form a mixed dispersion; the mass fraction of carbon nanotubes in the mixed dispersion was 3%; the remaining steps were the same as in Preparation Example 1.
[0054] Preparation Example 5
[0055] The difference between Preparation Example 5 and Preparation Example 1 is that graphene oxide was added to water and ultrasonically dispersed for 30 minutes to form a mixed dispersion; the mass fraction of graphene oxide in the mixed dispersion was 3%; the remaining steps were the same as in Preparation Example 1.
[0056] Example
[0057] Example 1
[0058] Example 1 provides a method for preparing antistatic SMS nonwoven fabric, including the following steps:
[0059] Outer layer preparation: 95 kg of polypropylene, 1 kg of lubricant, and 1 kg of filler from Preparation Example 1 are stirred and mixed evenly to obtain a mixture. Half of the mixture is subjected to extrusion melting, spinning, cold air treatment, stretching and shaping, and fiber separation to form the first fiber web, which is the outer layer; the lubricant is magnesium stearate.
[0060] Composite process: The intermediate layer raw material is extruded and melted to form a melt. The melt is then extruded to form nascent fiber streams. These nascent fiber streams are uniformly adsorbed onto the outer layer to obtain the second fiber web. The remaining mixture is then subjected to extrusion melting, spinning, cold air treatment, stretching and setting, and fiber separation to form the third fiber web, which is another outer layer. The third fiber web is then adsorbed onto the second fiber web and hot-pressed at 140°C to obtain the semi-finished product. The intermediate layer is meltblown nonwoven fabric.
[0061] Antistatic treatment: Mix 95kg water, 0.1kg penetrant, and 0.3kg antistatic agent evenly to obtain a treatment solution. Immerse the semi-finished product in the treatment solution for 30 minutes, remove it, and dry it to obtain SMS non-woven fabric. The penetrant is hexadecyltrimethylammonium bromide; the antistatic agent is a mixture of bis(β-hydroxyethyl)cocoamine and negative ionic silicone antistatic agent, and the weight ratio of bis(β-hydroxyethyl)cocoamine to negative ionic silicone antistatic agent is 1:1.
[0062] Example 2
[0063] The difference between Example 2 and Example 1 is that in the outer layer preparation step, the filler used in Example 2 is selected; the remaining steps are the same as in Example 1.
[0064] Example 3
[0065] The difference between Example 3 and Example 1 is that in the outer layer preparation step, the filler used in Example 3 is selected; the remaining steps are the same as in Example 1.
[0066] Example 4
[0067] The difference between Example 4 and Example 2 is that in the outer layer preparation step, 98 kg of polypropylene, 3 kg of lubricant, and 3 kg of filler from Example 2 are stirred and mixed evenly to obtain a mixture. Half of the mixture is then subjected to extrusion melting, spinning, cold air treatment, stretching and shaping, and fiber separation to form the first fiber web, which is the outer layer; wherein the lubricant is magnesium stearate.
[0068] Composite process: The intermediate layer raw material is extruded and melted to form a melt. The melt is then extruded to form nascent fiber streams. These nascent fiber streams are uniformly adsorbed onto the outer layer to obtain the second fiber web. The remaining mixture is then subjected to extrusion melting, spinning, cold air treatment, stretching and setting, and fiber separation to form the third fiber web, which is another outer layer. The third fiber web is then adsorbed onto the second fiber web and hot-pressed at 140°C to obtain the semi-finished product. The intermediate layer is meltblown nonwoven fabric.
[0069] Antistatic treatment: Mix 98kg water, 0.2kg penetrant and 0.4kg antistatic agent evenly to obtain a treatment solution. Immerse the semi-finished product in the treatment solution for 30 minutes, take it out and dry it to obtain SMS non-woven fabric; the remaining steps are the same as in Example 2.
[0070] Example 5
[0071] The difference between Example 5 and Example 2 is that in the outer layer preparation step, 100 kg of polypropylene, 5 kg of lubricant, and 5 kg of filler from Example 2 are stirred and mixed evenly to obtain a mixture. Half of the mixture is then subjected to extrusion melting, spinning, cold air treatment, stretching and shaping, and fiber separation to form the first fiber web, which is the outer layer; wherein the lubricant is magnesium stearate.
[0072] Composite process: The intermediate layer raw material is extruded and melted to form a melt. The melt is then extruded to form nascent fiber streams. These nascent fiber streams are uniformly adsorbed onto the outer layer to obtain the second fiber web. The remaining mixture is then subjected to extrusion melting, spinning, cold air treatment, stretching and setting, and fiber separation to form the third fiber web, which is another outer layer. The third fiber web is then adsorbed onto the second fiber web and hot-pressed at 140°C to obtain the semi-finished product. The intermediate layer is meltblown nonwoven fabric.
[0073] Antistatic treatment: Mix 100kg water, 0.3kg penetrant and 0.5kg antistatic agent evenly to obtain a treatment solution. Immerse the semi-finished product in the treatment solution for 30 minutes, take it out and dry it to obtain SMS non-woven fabric; the remaining steps are the same as in Example 2.
[0074] Example 6
[0075] The difference between Example 6 and Example 4 is that in the antistatic treatment step, 98 kg of water, 0.2 kg of penetrant, and 0.4 kg of antistatic agent are stirred and mixed evenly to obtain a treatment solution. The semi-finished product is immersed in the treatment solution for 30 minutes, taken out, and dried to obtain SMS non-woven fabric. The antistatic agent is bis(β-hydroxyethyl)cocoaluminamine. The remaining steps are the same as in Example 4.
[0076] Example 7
[0077] The difference between Example 7 and Example 4 is that in the antistatic treatment step, 98 kg of water, 0.2 kg of penetrant, and 0.4 kg of antistatic agent are stirred and mixed evenly to obtain a treatment solution. The semi-finished product is immersed in the treatment solution for 30 minutes, taken out, and dried to obtain SMS non-woven fabric. The antistatic agent is a negative ion type silicone antistatic agent. The remaining steps are the same as in Example 4.
[0078] Comparative Example
[0079] Comparative Example 1
[0080] The difference between Comparative Example 1 and Example 1 is that in the outer layer preparation step, 96 kg of polypropylene and 1 kg of lubricant are stirred and mixed evenly to obtain a mixture. Half of the mixture is then subjected to extrusion melting, spinning, cold air treatment, stretching and shaping, and fiber separation to form the first fiber web, which is the outer layer. The remaining steps are the same as in Example 1.
[0081] Comparative Example 2
[0082] The difference between Comparative Example 2 and Example 1 is that in the outer layer preparation step, 95 kg of polypropylene, 1 kg of lubricant, and 1 kg of filler are stirred and mixed evenly to obtain a mixture. Half of the mixture is then subjected to extrusion melting, spinning, cold air treatment, stretching and shaping, and fiber separation to form the first fiber web, which is the outer layer. The filler is a mixture of carbon nanotubes and graphene oxide, and the weight ratio of carbon nanotubes to graphene oxide is 2:1. The remaining steps are the same as in Example 1.
[0083] Comparative Example 3
[0084] The difference between Comparative Example 3 and Example 1 is that, in the outer layer preparation step, the filler used is the filler from Preparation Example 4; the remaining steps are the same as in Example 1.
[0085] Comparative Example 4
[0086] The difference between Comparative Example 4 and Example 1 is that, in the outer layer preparation step, the filler used is the filler from Preparation Example 5; the remaining steps are the same as in Example 1.
[0087] Performance testing
[0088] Antistatic performance: The antistatic performance of the nonwoven fabric in each embodiment was tested according to GB / T12014-2009 "Antistatic Clothing". The surface resistance of the nonwoven fabric before washing and after 30 washings was obtained. The lower the surface resistance, the better the antistatic performance.
[0089] Table 1 Performance test results of nonwoven fabrics
[0090] sample Before washing (Ω) After washing (Ω) Example 1 <![CDATA[5.2*10 5 ]]> <![CDATA[7.2*10 5 ]]> Example 2 <![CDATA[2.2*10 5 ]]> <![CDATA[4.3*10 5 ]]> Example 3 <![CDATA[3.9*10 5 ]]> <![CDATA[6.6*10 5 <!-- 5 -->]]> Example 4 <![CDATA[1.0*10 5 ]]> <![CDATA[1.8*10 5 ]]> Example 5 <![CDATA[1.8*10 5 ]]> <![CDATA[3.1*10 5 ]]> Example 6 <![CDATA[1.5*10 5 ]]> <![CDATA[2.0*10 5 ]]> Example 7 <![CDATA[2.0*10 5 ]]> <![CDATA[3.6*10 5 ]]> Comparative Example 1 <![CDATA[9.5*10 7 ]]> <![CDATA[9.0*10 8 ]]> Comparative Example 2 <![CDATA[5.6*10 6 ]]> <![CDATA[2.6*10 7 ]]> Comparative Example 3 <![CDATA[9.2*10 5 ]]> <![CDATA[9.9*10 5 ]]> Comparative Example 4 <![CDATA[8.9*10 5 ]]> <![CDATA[1.1*10 6 ]]>
[0091] Combining Example 1 and Comparative Examples 1-4, the nonwoven fabric in Example 1 exhibits better antistatic durability. This is evident from the fact that chitosan-modified carbon nanotubes and graphene oxide are added to the raw materials during the preparation of the outer layer. The carbon nanotubes and graphene oxide are uniformly dispersed in the outer layer, forming a continuous conductive layer. Furthermore, the carbon nanotubes, graphene oxide, and lubricant are located in the outer layer, resulting in better antistatic durability of the nonwoven fabric.
[0092] In combination with Examples 1-3, the nonwoven fabric in Example 2 has the best antistatic properties. It can be seen that when preparing the filler, the ratio of carbon nanotubes, graphene oxide and chitosan in Example 2 is optimal, thus the filler has better performance.
[0093] Combining Examples 2, 4, and 5, the nonwoven fabric in Example 4 exhibits the best antistatic properties. This indicates that increasing the amount of raw materials used in the preparation of the outer layer leads to an initial increase followed by a decrease in the antistatic properties of the nonwoven fabric. Combining Examples 4, 6, and 7, the nonwoven fabric in Example 4 also shows the best antistatic properties. This suggests that when preparing the outer layer, a mixture of bis(β-hydroxyethyl)cocoaluminamine and anionic silicone antistatic agent is preferred, resulting in a nonwoven fabric with good antistatic properties.
[0094] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.
Claims
1. An antistatic SMS nonwoven fabric, characterized in that: The material comprises an intermediate layer and an outer layer, wherein the intermediate layer is located between two adjacent outer layers, and an antistatic layer is disposed on the outer layer. The raw materials of the outer layer include the following components in parts by weight: 95-100 parts of polypropylene, 1-5 parts of lubricant, and 1-5 parts of filler. The raw materials of the filler include chitosan, carbon nanotubes, and graphene oxide. The preparation method of the filler includes the following steps: dispersing carbon nanotubes and graphene oxide in water to form a mixed dispersion; adding chitosan to an aqueous acetic acid solution, stirring evenly to dissolve the chitosan, and obtaining chitosan solution. The mixture is added to the chitosan solution and stirred until homogeneous to obtain the stock solution. Glutaraldehyde is added to the stock solution, stirred until homogeneous, allowed to stand, sodium hydroxide solution is added, the mixture is soaked, filtered, washed, dried, and ground to obtain the filler. The mass fraction of carbon nanotubes in the mixture is 2%-3%. The mass fraction of graphene oxide in the mixture is 1%-2%. The mass fraction of chitosan in the chitosan solution is 0.1%-0.3%. The weight ratio of the mixture to the chitosan solution in the stock solution is 1:(8-9).
2. The antistatic SMS nonwoven fabric according to claim 1, characterized in that: The raw materials for the antistatic layer include 95-100 parts water, 0.1-0.3 parts penetrant, and 0.3-0.5 parts antistatic agent.
3. The antistatic SMS nonwoven fabric according to claim 2, characterized in that: The antistatic agent comprises a mixture of bis(β-hydroxyethyl)cocoamine and anionic silicone antistatic agent.
4. The antistatic SMS nonwoven fabric according to claim 3, characterized in that: The penetrant includes hexadecyltrimethylammonium bromide.
5. An antistatic SMS nonwoven fabric according to claim 1, characterized in that: The lubricant includes one or more of stearic acid alcohol, magnesium stearate, and paraffin wax.
6. A method for preparing an antistatic SMS nonwoven fabric as described in any one of claims 1-5, characterized in that: Includes the following steps: Outer layer preparation: Polypropylene, lubricant and filler are stirred and mixed evenly to obtain a mixture. Part of the mixture is then subjected to extrusion melting, spinning and spinning, cold air treatment, stretching and shaping, and fiber separation to form the first fiber web, which is the outer layer. Composite: The middle layer and the outer layer are adsorbed to obtain the second fiber web. The remaining mixture is extruded and melted, spun and spun, treated with cold air process, stretched and shaped, and separated into fibers to form the third fiber web, which is another outer layer. Then the third fiber web is adsorbed onto the second fiber web and hot-pressed to obtain the semi-finished product. Antistatic treatment: Mix water, penetrant, and antistatic agent evenly to obtain a treatment solution. Immerse the semi-finished product in the treatment solution, remove it, and dry it to obtain SMS non-woven fabric.
7. The method for preparing an antistatic SMS nonwoven fabric according to claim 6, characterized in that: The intermediate layer comprises meltblown nonwoven fabric.