Air-permeable high-strength composite nonwoven fabric and method for manufacturing the same

Abstract

The application discloses a kind of breathable high-strength composite non-woven fabric and its preparation method, comprising the following steps: S1: polypropylene, polyester fiber, polyurethane, sodium polyacrylate, sodium carboxymethyl cellulose, dimethicone and cetyltrimethylammonium bromide are added to double-screw extruder, melt and extruded into mixed melt;S2: the mixed melt is metered, spinning, drawing, laying, reinforcing, to obtain non-woven fabric;First non-woven fabric and second non-woven fabric are cut from non-woven fabric;S3: first non-woven fabric and second non-woven fabric are immersed into nano alumina liquid for 24-36h first, then immersed into modified carbon fiber liquid for 24-48h;S4: first non-woven fabric and second non-woven fabric obtained in step S3 are extruded into cloth, dried at 50-60℃, edge cutting, winding, to obtain breathable high-strength composite non-woven fabric.The preparation process of the application is environment-friendly, simple and reliable, and the obtained non-woven fabric has good air permeability and strength, and strong applicability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of non-woven fabric, in particular to a breathable high-strength composite non-woven fabric and a preparation method thereof. BACKGROUND

[0002] Non-woven fabric, also known as non-woven fabric, is composed of oriented or random fibers. It is called cloth because of its appearance and certain properties. At present, non-woven fabric has very wide application in gauze, wound dressing and other medical and health products, as well as cosmetic cotton, facial mask and other sanitary cleaning materials. The use of these two aspects is close to the skin or mucosa of human body, and the skin and mucosa are the first health barrier of human body. Therefore, the pure cotton non-woven fabric used as the base material of these two aspects has higher requirements, that is, it not only has sufficient comfort, but also has good air permeability and mechanical properties. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a breathable high-strength composite non-woven fabric and a preparation method thereof. The preparation process is environmentally friendly, simple and reliable. The obtained composite non-woven fabric has good air permeability and strength, and strong applicability.

[0004] In order to achieve the above purpose, the present application provides the following technical scheme:

[0005] A preparation method of a breathable high-strength composite non-woven fabric, comprising the following steps:

[0006] S1: polypropylene, polyester fiber, polyurethane, sodium polyacrylate, sodium carboxymethyl cellulose, polydimethylsiloxane and cetyltrimethylammonium bromide are added into a double screw extruder, melted and extruded into a mixed melt;

[0007] S2: the mixed melt is measured, spun, drawn, laid, and reinforced to obtain a non-woven fabric; the first non-woven fabric and the second non-woven fabric are cut from the non-woven fabric;

[0008] S3: the first non-woven fabric and the second non-woven fabric are first soaked in a nano-aluminum oxide liquid for 24-36 hours, and then soaked in a modified carbon fiber liquid for 24-48 hours;

[0009] S4: the first non-woven fabric and the second non-woven fabric obtained in step S3 are extruded into a cloth, dried at 50-60℃, cut and rolled to obtain a breathable high-strength composite non-woven fabric.

[0010] Preferably, the soaking in the modified carbon fiber liquid in step S3 comprises: first soaking in an acyl chloride carbon fiber liquid for 12-24 hours, and then soaking in a coupling carbon fiber liquid for 12-24 hours.

[0011] Preferably, the weight ratio of the polypropylene, the polyester fiber, the polyurethane, the sodium polyacrylate, the sodium carboxymethyl cellulose, the dimethicone and the cetyl trimethyl ammonium bromide is 1:6:2:1:1:1:1.

[0012] Preferably, the preparation method of the nano-alumina liquid in the step S3 is specifically as follows: nano-alumina, chitosan and an acetic acid solution with a volume fraction of 75% are mixed in a weight ratio of 2:1:5, stirring is conducted at 30-40 DEG C for 24-36 h, and then the nano-alumina liquid is obtained.

[0013] Preferably, the preparation method of the acyl chloride carbon fiber liquid is specifically as follows:

[0014] The carbon fiber is added into a sulfuric acid solution with a volume fraction of 75% to obtain acidified carbon fiber.

[0015] The acidified carbon fiber and the thionyl chloride are added into a dimethylformamide solution, nitrogen protection reaction is conducted at 70-80 DEG C for 24-48 h, and then the acyl chloride carbon fiber liquid is obtained.

[0016] Preferably, the weight ratio of the carbon fiber and the sulfuric acid solution is 1:5; and the weight ratio of the acidified carbon fiber, the thionyl chloride, the dimethylformamide solution and the tetrahydrofuran is 1:1:3:4.

[0017] Preferably, the preparation method of the coupling carbon fiber liquid is specifically as follows: the carbon fiber, the silane coupling agent, the sodium dodecyl sulfate and the graphene oxide solution with a mass fraction of 75% are mixed, stirring reaction is conducted at 60-70 DEG C for 12-24 h, and then the coupling carbon fiber liquid is obtained.

[0018] Preferably, the weight ratio of the carbon fiber, the silane coupling agent, the sodium dodecyl sulfate and the graphene oxide solution is 1:1:1:1.

[0019] The application further provides a breathable high-strength composite non-woven fabric prepared by the preparation method.

[0020] Beneficial effects: the grafting dispersibility of the nano-alumina liquid nanoparticles in the application enables the dispersed grafting nanoparticles to form pores by particle accumulation between the two layers of non-woven fabrics, increase the spacing between the two layers of non-woven fabrics, and then crosslink the acyl chloride carbon fiber liquid and the coupling carbon fiber liquid after the nano-alumina liquid coating, so that the fibers are connected through crosslinking, the specific surface area and the binding force of the fibers are effectively improved, a three-dimensional space structure with the nano solution as the origin and the fiber liquid as the branch line is established, a porous network structure with good pore volume is formed, the spacing between the two layers of non-woven fabric fibers is further increased, and a three-dimensional porous channel interlayer is formed, so that the breathability and the strength of the composite non-woven fabric are improved. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. In addition, it is particularly stated that the raw materials and equipment of the present application can be obtained from the market, and will not be listed one by one.

[0022] Embodiment one:

[0023] A preparation method of a breathable high-strength composite non-woven fabric, comprising the following steps:

[0024] S1: polypropylene, polyester fiber, polyurethane, sodium polyacrylate, sodium carboxymethyl cellulose, polydimethylsiloxane and cetyltrimethylammonium bromide are added into a double-screw extruder in a proportion of 1:6:2:1:1:1:1 by weight, melted and extruded into a mixed melt;

[0025] S2: the mixed melt is metered, spun, drawn, laid, and reinforced to obtain a non-woven fabric; a first non-woven fabric and a second non-woven fabric are cut from the non-woven fabric;

[0026] S3: the first non-woven fabric and the second non-woven fabric are first soaked in a nano-alumina oxide liquid for 36h, and then soaked in a modified carbon fiber liquid for 48h, that is, first soaked in an acyl chloride carbon fiber liquid for 24h, and then soaked in a coupling carbon fiber liquid for 24h;

[0027] The preparation method of the nano-alumina oxide liquid is specifically as follows: nano-alumina oxide, chitosan and an acetic acid solution with a volume fraction of 75% are mixed in a proportion of 2:1:5 by weight, stirred at 40°C for 36h, and the nano-alumina oxide liquid is obtained;

[0028] The preparation method of the acyl chloride carbon fiber liquid is specifically as follows:

[0029] The carbon fiber and a sulfuric acid solution with a volume fraction of 75% are mixed in a proportion of 1:5 by weight to obtain acidified carbon fiber; the acidified carbon fiber, dichlorosulfoxide and dimethylformamide solution are mixed in a proportion of 1:1:3:4 by weight, reacted under nitrogen protection at 80°C for 48h, and tetrahydrofuran is added to obtain the acyl chloride carbon fiber liquid;

[0030] The preparation method of the coupling carbon fiber liquid is specifically as follows: the carbon fiber, silane coupling agent, sodium dodecyl sulfate and graphene oxide solution with a mass fraction of 75% are mixed in a proportion of 1:1:1:1 by weight, stirred and reacted at 70°C for 24h to obtain the coupling carbon fiber liquid;

[0031] S4: The first non-woven fabric and the second non-woven fabric obtained in step S3 are extruded and compounded into a cloth, dried at 60℃, cut and rolled to obtain a breathable high-strength composite non-woven fabric.

[0032] Example Two:

[0033] A method for preparing a breathable high-strength composite non-woven fabric, comprising the following steps:

[0034] S1: Polypropylene, polyester fiber, polyurethane, sodium polyacrylate, sodium carboxymethyl cellulose, polydimethylsiloxane and cetyltrimethylammonium bromide are added into a double screw extruder in a ratio of 1:6:2:1:1:1:1 by weight, melted and extruded into a mixed melt;

[0035] S2: The mixed melt is metered, spun, drawn, laid, and reinforced to obtain a non-woven fabric; the first non-woven fabric and the second non-woven fabric are cut from the non-woven fabric;

[0036] S3: The first non-woven fabric and the second non-woven fabric are first soaked in a nano-alumina solution for 24 hours, and then soaked in a modified carbon fiber solution for 24 hours, that is, first soaked in an acyl chloride carbon fiber solution for 12 hours, and then soaked in a coupling carbon fiber solution for 12 hours;

[0037] The preparation method of the nano-alumina solution is as follows: nano-alumina, chitosan and acetic acid solution with a volume fraction of 75% are mixed in a ratio of 2:1:5 by weight, stirred at 30℃ for 24 hours to obtain the nano-alumina solution;

[0038] The preparation method of the acyl chloride carbon fiber solution is as follows:

[0039] The carbon fiber and sulfuric acid solution with a volume fraction of 75% are mixed in a ratio of 1:5 by weight to obtain acidified carbon fiber; the acidified carbon fiber, dichlorosulfoxide and dimethylformamide solution are mixed in a ratio of 1:1:3:4 by weight, and reacted at 70℃ under nitrogen protection for 24 hours, and then tetrahydrofuran is added to obtain the acyl chloride carbon fiber solution;

[0040] The preparation method of the coupling carbon fiber solution is as follows: carbon fiber, silane coupling agent, sodium dodecyl sulfate and graphene oxide solution with a mass fraction of 75% are mixed in a ratio of 1:1:1:1 by weight, and stirred and reacted at 60℃ for 12 hours to obtain the coupling carbon fiber solution;

[0041] S4: The first non-woven fabric and the second non-woven fabric obtained in step S3 are extruded and compounded into a cloth, dried at 50℃, cut and rolled to obtain a breathable high-strength composite non-woven fabric.

[0042] Example Three:

[0043] A preparation method of a breathable high-strength composite non-woven fabric, comprising the following steps:

[0044] S1: polypropylene, polyester fiber, polyurethane, sodium polyacrylate, sodium carboxymethyl cellulose, polydimethylsiloxane and cetyltrimethylammonium bromide are added into a double screw extruder in a proportion of 1:6:2:1:1:1:1 by weight, melted and extruded into a mixed melt;

[0045] S2: the mixed melt is metered, spun, drawn, laid, and reinforced to obtain a non-woven fabric; the first non-woven fabric and the second non-woven fabric are cut from the non-woven fabric;

[0046] S3: the first non-woven fabric and the second non-woven fabric are first soaked in a nano-alumina liquid for 30h, and then soaked in a modified carbon fiber liquid for 36h, that is, first soaked in an acyl chloride carbon fiber liquid for 18h, and then soaked in a coupling carbon fiber liquid for 18h;

[0047] The preparation method of the nano-alumina liquid is specifically as follows: nano-alumina, chitosan and an acetic acid solution with a volume fraction of 75% are mixed in a proportion of 2:1:5 by weight, stirred at 35°C for 30h, and the nano-alumina liquid is obtained;

[0048] The preparation method of the acyl chloride carbon fiber liquid is specifically as follows:

[0049] The carbon fiber and a sulfuric acid solution with a volume fraction of 75% are mixed in a proportion of 1:5 by weight to obtain acidified carbon fiber; the acidified carbon fiber, dichlorosulfoxide and dimethylformamide solution are mixed in a proportion of 1:1:3:4 by weight, reacted at 75°C under nitrogen protection for 36h, and tetrahydrofuran is added to obtain the acyl chloride carbon fiber liquid;

[0050] The preparation method of the coupling carbon fiber liquid is specifically as follows: the carbon fiber, silane coupling agent, sodium dodecyl sulfate and graphene oxide solution with a mass fraction of 75% are mixed in a proportion of 1:1:1:1 by weight, stirred and reacted at 65°C for 18h to obtain the coupling carbon fiber liquid;

[0051] S4: the first non-woven fabric and the second non-woven fabric obtained in step S3 are extruded and compounded into a fabric, dried at 55°C, edged, and rolled to obtain the breathable high-strength composite non-woven fabric.

[0052] Comparative Example 1:

[0053] Comparative Example 1 and Example 1 are basically the same in component weight parts and preparation method, except that the nano-alumina liquid is not used, and the specific preparation method is as follows:

[0054] A preparation method of a breathable high-strength composite non-woven fabric, comprising the following steps:

[0055] S1: polypropylene, polyester fiber, polyurethane, sodium polyacrylate, sodium carboxymethyl cellulose, dimethicone and cetyltrimethylammonium bromide are added into a twin-screw extruder in a ratio of 1:6:2:1:1:1:1 by weight, melted and extruded into a mixed melt;

[0056] S2: the mixed melt is metered, spun, drawn, laid, and reinforced to obtain a non-woven fabric; the first non-woven fabric and the second non-woven fabric are cut from the non-woven fabric;

[0057] S3: the first non-woven fabric and the second non-woven fabric are soaked in the modified carbon fiber liquid for 48h, that is, first soaked in the acyl chloride carbon fiber liquid for 24h, and then soaked in the coupling carbon fiber liquid for 24h;

[0058] The preparation method of the acyl chloride carbon fiber liquid is specifically as follows:

[0059] The carbon fiber is mixed with a 75% by volume sulfuric acid solution in a ratio of 1:5 by weight to obtain acidified carbon fiber; the acidified carbon fiber, dichlorosulfoxide and dimethylformamide solution are mixed in a ratio of 1:1:3:4 by weight, and reacted at 80°C under nitrogen protection for 48h, and then tetrahydrofuran is added to obtain the acyl chloride carbon fiber liquid;

[0060] The preparation method of the coupling carbon fiber liquid is specifically as follows: the carbon fiber, silane coupling agent, sodium dodecyl sulfate and 75% by mass graphene oxide solution are mixed in a ratio of 1:1:1:1 by weight, and stirred and reacted at 70°C for 24h to obtain the coupling carbon fiber liquid;

[0061] S4: the first non-woven fabric and the second non-woven fabric obtained in step S3 are extruded and compounded into a fabric, dried at 60°C, trimmed, and rolled to obtain a breathable high-strength composite non-woven fabric.

[0062] Comparative Example 2:

[0063] Comparative Example 2 and Example 1 are basically the same in component weight parts and preparation method, except that no modified carbon fiber liquid is used, specifically:

[0064] A preparation method of a breathable high-strength composite non-woven fabric, comprising the following steps:

[0065] S1: polypropylene, polyester fiber, polyurethane, sodium polyacrylate, sodium carboxymethyl cellulose, dimethicone and cetyltrimethylammonium bromide are added into a twin-screw extruder in a ratio of 1:6:2:1:1:1:1 by weight, melted and extruded into a mixed melt;

[0066] S2: the mixed melt is metered, spun, drawn, laid, and reinforced to obtain a non-woven fabric; the first non-woven fabric and the second non-woven fabric are cut from the non-woven fabric;

[0067] S3: soaking the first non-woven fabric and the second non-woven fabric in the nano-alumina liquid for 36 hours;

[0068] The preparation method of the nano-alumina liquid is as follows: mixing nano-alumina, chitosan and acetic acid solution with a volume fraction of 75% in a weight ratio of 2:1:5, and stirring at 40°C for 36 hours to obtain the nano-alumina liquid.

[0069] S4: extruding and compounding the first non-woven fabric and the second non-woven fabric obtained in step S3 into a fabric, drying at 60°C, trimming, and rolling to obtain the breathable high-strength composite non-woven fabric.

[0070] The breathable high-strength composite non-woven fabrics obtained in Examples 1-3, commercially available Guanghua Medical breathable non-woven fabric and Comparative Examples 1-2 were tested for performance, and the test results are shown in Table 1.

[0071] Test method: (1) Air permeability: measured according to GB / T 5453-1997 "Determination of air permeability of textile fabrics"; (2) Breaking strength: measured according to GB / T 3923.1-2013 "Textile fabrics-Tensile properties-Part 1: determination of breaking force and elongation at break (strip method)".

[0072] Test item Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Commercially available Air permeability mm / s 540 520 540 280 320 480 Breaking strength / N 230 240 230 130 150 210

[0073] As can be seen from the above table, the air permeability and strength of the breathable high-strength composite non-woven fabrics of Examples 1-3 are improved compared with the commercially available non-woven fabric and Comparative Examples 1-2, which shows that the present application not only improves the air permeability of the composite non-woven fabric, but also improves the strength of the composite non-woven fabric.

[0074] The above description of the disclosed embodiments enables one skilled in the art to make or use the application. Numerous modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Therefore, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for producing a breathable high-strength composite nonwoven fabric, characterized by comprising the steps of: It comprises the following steps: ​ S1: polypropylene, polyester fiber, polyurethane, sodium polyacrylate, sodium carboxymethyl cellulose, dimethicone and cetyltrimethylammonium bromide are added into a double screw extruder, melted and extruded into a mixed melt; S2: the mixed melt is metered, spun, drawn, laid, and reinforced to obtain a non-woven fabric; the first non-woven fabric and the second non-woven fabric are cut from the non-woven fabric; S3: the first non-woven fabric and the second non-woven fabric are first soaked in a nano-alumina liquid for 24-36 hours, and then soaked in a modified carbon fiber liquid for 24-48 hours; S4: the first non-woven fabric and the second non-woven fabric obtained in step S3 are extruded and compounded into a fabric, dried at 50-60℃, trimmed, and rolled to obtain a breathable high-strength composite non-woven fabric; The soaking in the modified carbon fiber liquid in step S3 comprises: first soaking in an acyl chloride carbon fiber liquid for 12-24 hours, and then soaking in a coupling carbon fiber liquid for 12-24 hours.

2. The method for preparing the breathable high-strength composite nonwoven fabric as described in claim 1, characterized in that, The weight ratio of the polypropylene, polyester fiber, polyurethane, sodium polyacrylate, sodium carboxymethyl cellulose, dimethicone and cetyltrimethylammonium bromide is 1:6:2:1:1:1:

1.

3. The method for preparing the breathable high-strength composite nonwoven fabric as described in claim 1, characterized in that, The preparation method of the nano-alumina liquid in step S3 is specifically: nano-alumina, chitosan and an acetic acid solution with a volume fraction of 75% are mixed in a weight ratio of 2:1:5, stirred at 30-40℃ for 24-36 hours to obtain a nano-alumina liquid.

4. The method for preparing the breathable high-strength composite nonwoven fabric as described in claim 1, characterized in that, The preparation method of the acyl chloride carbon fiber liquid is specifically: The carbon fiber is added into a sulfuric acid solution with a volume fraction of 75% to obtain acidified carbon fiber; The acidified carbon fiber and thionyl chloride are added into a dimethylformamide solution, and reacted under nitrogen protection at 70-80℃ for 24-48 hours, and then tetrahydrofuran is added to obtain an acyl chloride carbon fiber liquid.

5. The method for preparing the breathable high-strength composite nonwoven fabric as described in claim 4, characterized in that, The weight ratio of the carbon fiber and the sulfuric acid solution is 1:5; the weight ratio of the acidified carbon fiber, thionyl chloride, dimethylformamide solution and tetrahydrofuran is 1:1:3:

4.

6. The method for preparing the breathable high-strength composite nonwoven fabric as described in claim 1, characterized in that, The preparation method of the coupling carbon fiber liquid is specifically: the carbon fiber, silane coupling agent, sodium dodecyl sulfate and graphene oxide solution with a mass fraction of 75% are mixed, and stirred and reacted at 60-70℃ for 12-24 hours to obtain a coupling carbon fiber liquid.

7. The method for preparing the breathable high-strength composite nonwoven fabric as described in claim 6, characterized in that, The weight ratio of the carbon fiber, silane coupling agent, sodium dodecyl sulfate and graphene oxide solution is 1:1:1:

1.

8. A breathable high-strength composite non-woven fabric prepared by the preparation method of any one of claims 1 to 7.