A preparation process of wavy high-permeability 3D spunlace mesh

Abstract

The present invention provides a preparation process of a wavy high-breathable 3D spunlace mesh, comprising: S1, opening raw materials, S2, making a fiber mesh, S3, spunlace 3D patterns, and S4, drying and forming; the 3D spunlace mesh prepared by the process of the present invention has enhanced three-dimensionality and firmness, and the three-dimensional effect can be enhanced by the wavy spunlace method and the selection of long and short fiber materials for compounding, while also improving the air permeability of the material.

Description

Technical Field

[0001] The present invention relates to the technical field of spunlace mesh fabrics, and in particular to a preparation process of a wavy high-breathable 3D spunlace mesh. Background Art

[0002] As one of the three major industries in the textile industry, the nonwovens industry is considered to be a sunrise industry in the 21st century. The development speed of my country's nonwovens industry has greatly exceeded that of the traditional textile industry, and it is one of the fastest-growing industries in the textile industry. The spunlace nonwoven process is a late-starting nonwoven processing technology. It uses high-speed and high-pressure water flow to impact the fiber web, causing the fibers to entangle and bond with each other to reinforce the fabric. The processing characteristics of the spunlace technology are green and environmentally friendly. The products have the characteristics of delicate appearance, good hygroscopicity, and soft feel. It is called the third-generation nonwoven processing technology.

[0003] The consolidation principle of the spunlace method The spunlace method uses multiple fine water jets generated by high pressure to spray the fiber web. In the spunlace nonwoven process, the fibers in the fiber web are displaced, interlaced, entangled and embraced under the hydraulic action of high-speed water jets interlaced in different directions, thereby reinforcing the fiber web. The spunlace nonwoven material has good moisture absorption and air permeability, soft feel, high strength, good drapability, and does not require adhesive reinforcement. The appearance is closer to traditional textiles than other nonwoven materials. Spunlace nonwoven materials are usually light and thin; they are mainly used in medical and sanitary materials, facial masks, artificial leather base fabrics, high-grade rags, towels, cotton pads, wet wipes, etc. The air permeability of the current spunlace net nonwoven fabric needs to be further enhanced. The reason is that it is difficult to simultaneously improve the three-dimensionality and firmness of the 3D spunlace net in the existing method. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a preparation process of a wavy high-air-permeability 3D spunlace mesh.

[0005] The technical solution of the present invention is:

[0006] A preparation process of a wavy high-permeability 3D spunlace mesh, comprising the following steps:

[0007] S1. Opening of raw materials:

[0008] S1-1, respectively select short fiber materials composed of polytetrafluoroethylene fiber, bamboo charcoal fiber, and basalt fiber in a mass ratio of 2:3 to 5:1, and long fiber materials composed of polypropylene fiber, viscose fiber, and cotton fiber in a mass ratio of 3:1:0.5 to 1;

[0009] S1-2, respectively opening the short fiber material and the long fiber material by using an opening machine; after opening, sending the opened materials to a multi-bin cotton blending machine for blending, and after blending, obtaining short mixed fiber bundles and long mixed fiber bundles respectively;

[0010] S2. Making fiber web:

[0011] The long mixed fiber bundle obtained in step S1 is placed in a roller carding machine for carding, and the long mixed fiber bundle is carded and woven into a first thin web; the short mixed fiber bundle is sent to an air flow carding machine for carding to form a second thin web;

[0012] S3, 3D spunlace patterning:

[0013] S3-1, pre-wetting the first thin web and the second thin web and stacking them into a web, the number of stacking layers is 3, the second thin web is placed between the two first thin webs, and after the stacking is completed, a composite fiber web is obtained;

[0014] S3-2, placing the composite fiber web into a spunlacing machine, and forming a 3D three-dimensional fiber web with a wave texture through high-pressure jet spunlacing rows arranged in a wave shape;

[0015] S4, drying and molding

[0016] The 3D three-dimensional structure fiber web obtained in step S3 is heated and dried, and fixed-point reinforcement is performed during the drying process. After completion, a 3D three-dimensional spunlace net finished product is obtained.

[0017] Description: The three-dimensionality and firmness of the 3D spunlace mesh obtained by the above process are enhanced, and the enhancement of the three-dimensionality further improves the air permeability of the material; by selecting short fiber materials with higher strength and chemical stability, and combing them through air flow, the short fibers can be made into a three-dimensional randomly arranged structure, which plays the role of a skeleton, thereby enhancing the three-dimensional effect and improving the air permeability. By selecting long fiber materials, the surface material can be made softer, thereby improving the accuracy and effect of use.

[0018] Furthermore, the short fiber material in step S1 has a fineness of 10 to 15D, a fiber length of 10 to 55 mm, and a curl elasticity of 70 to 80%.

[0019] Note: The above-mentioned setting can achieve a better composite effect of long and short fiber materials.

[0020] Furthermore, in step S1, the spacing of the needle teeth between the licker-in rollers of the opener is 1-1.5 cm, the licker-in roller speed is 110-115 r / min, and the fan speed is 1500-1800 r / min.

[0021] Note: By setting the above process parameters, the opening effect can be better and the damage to the fiber can be reduced.

[0022] Furthermore, the feeding speed of the roller carding machine in step S2 is 0.5-0.8 m / min, the cylinder speed is 800-850 m / min, the output fiber web speed is 51-55 m / min; and the suction fan coefficient of the airflow carding machine is 85%.

[0023] Description: By combing in the above two ways, the web layers of the first thin web and the second thin web are evenly distributed, thereby improving the composite effect.

[0024] Furthermore, the pre-wetting treatment method in step S3 is: using a spray humidifier to spray water mist on each first thin web and the second thin web for pre-wetting, the sprayed particles are 0.02-0.1mm water particles, and the moisture content after pre-wetting and stacking into a web is 35-45%.

[0025] Description: Pre-wetting by the above method can provide better compounding conditions for the first thin web and the second thin web, and promote compounding of the first thin web and the second thin web.

[0026] Furthermore, a treatment agent accounting for 10% of the water mass is added to the water mist, and the treatment agent is prepared by mixing polyvinyl alcohol, glycidyl neodecanoate, and organosilicon quaternary ammonium salt in a mass ratio of 5:2:0.8-2.

[0027] Description: By adding the above-mentioned treatment agent, the softness and antibacterial property of the composite fiber web can be improved; by adding atomized polyvinyl alcohol, the bonding between the first thin web and the second thin web can be made stronger, while having little effect on the air permeability; by adding neodecanoic acid glycidyl ester, the mixing degree between the treatment agent components is better, thereby improving the softness of the composite fiber; by adding silicone quaternary ammonium salt, the composite fiber web can have a certain antibacterial effect.

[0028] Furthermore, the specification of the needle plate of the water spurting used in step S3 is 0.5-1 mm, and the distance between adjacent water needles is 1.5-2 mm.

[0029] Note: By setting the above parameters, spunlace can better play the role of patterning and fixing.

[0030] Furthermore, in step S3, the water outlet pressure of the water jet head is 75-85 bar.

[0031] Note: By setting the above parameters, the spunlace can play a role in patterning and fixing while not causing destructive effects on the material of the composite fiber web.

[0032] Furthermore, the fixed-point reinforcement method in step S4 is: starting from room temperature, heating and drying at a heating rate of 5°C / min until the temperature reaches 95-105°C and then maintained; when the moisture content is dried to 15-20%, a constant temperature fixed-point hot rolling reinforcement is carried out, and then the temperature is cooled to room temperature at a cooling rate of 5-8°C / min and continued to dry; when the moisture content is dried to 6-10%, a second fixed-point hot rolling reinforcement is carried out; the first fixed-point hot rolling reinforcement and the second fixed-point hot rolling reinforcement methods are both: a row of hot rolling reinforcement is carried out using rolling wheel steel thorns every two rows of wavy patterns, and the density of the rolling wheel steel thorns is 1 / 2 of the density of the water-jet needles.

[0033] Note: Through the above reinforcement method, the firmness and flexibility of the 3D three-dimensional structure fiber mesh can be improved, while the air permeability and softness of the composite material are less affected.

[0034] Furthermore, the hot rolling temperature is 110-115°C.

[0035] Note: The hot rolling fixation effect is better at this temperature.

[0036] The beneficial effects of the present invention are:

[0037] (1) The three-dimensionality and firmness of the 3D spunlace mesh obtained by the process method of the present invention are enhanced, and the enhancement of the three-dimensionality further improves the air permeability of the material; by selecting short fiber materials with high strength and chemical stability and combing them through air flow, the short fibers can be made into a three-dimensional randomly arranged structure, which plays the role of a skeleton, thereby enhancing the three-dimensional effect and improving the air permeability. By selecting long fiber materials, the surface material can be made softer, thereby improving the accuracy and effect of use.

[0038] (2) The present invention can improve the softness and antibacterial properties of the composite fiber web by pre-wetting and adding a treatment agent; the addition of atomized polyvinyl alcohol can make the bonding between the first thin web and the second thin web more firmly, while having little effect on the air permeability; the addition of glycidyl neodecanoate can improve the mixing degree between the treatment agent components, thereby improving the softness of the composite fiber; and the addition of silicone quaternary ammonium salt can make the composite fiber web have a certain antibacterial effect.

[0039] (3) The present invention can improve the firmness and flexibility of the 3D three-dimensional structure fiber web by setting a reinforcement method; by setting different combing methods, the web layers of the first thin web and the second thin web are distributed more evenly, thereby improving the composite effect; and by setting parameters such as fineness, the composite effect of long and short fiber materials is better. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with specific implementation methods to better reflect the advantages of the present invention.

[0041] Example 1

[0042] A preparation process of a wavy high-permeability 3D spunlace mesh, comprising the following steps:

[0043] S1. Opening of raw materials:

[0044] S1-1, respectively select short fiber materials composed of polytetrafluoroethylene fiber, bamboo charcoal fiber, and basalt fiber in a mass ratio of 2:4:1, and long fiber materials composed of polypropylene fiber, viscose fiber, and cotton fiber in a mass ratio of 3:1:0.8;

[0045] The short fiber material has a fineness of 12D, a fiber length of 25 mm, and a curl elasticity of 75%;

[0046] S1-2, respectively opening the short fiber material and the long fiber material by using an opening machine; after opening, sending the opened materials to a multi-bin cotton blending machine for blending, and after blending, obtaining short mixed fiber bundles and long mixed fiber bundles respectively;

[0047] The spacing of the needle teeth between the licker-in rollers of the opener is 1.4 cm, the licker-in roller speed is 112 r / min, and the fan speed is 1700 r / min;

[0048] S2. Making fiber web:

[0049] The long mixed fiber bundle obtained in step S1 is placed in a roller carding machine for carding, and the long mixed fiber bundle is carded and woven into a first thin web; the short mixed fiber bundle is sent to an air flow carding machine for carding to form a second thin web;

[0050] The feeding speed of the roller carding machine is 0.6 m / min, the cylinder speed is 830 m / min, and the output fiber web speed is 52 m / min; the suction fan coefficient of the airflow carding machine is 85%.

[0051] S3, 3D spunlace patterning:

[0052] S3-1. Pre-wetting the first thin web and the second thin web and stacking them into a web, the number of stacking layers is 3, the second thin web is located between the two first thin webs, and a composite fiber web is obtained after stacking; the pre-wetting method described in step S3 is: using a spray humidifier to spray water mist on each first thin web and the second thin web for pre-wetting, the sprayed particles are water particles of 0.02 to 0.1 mm, and the moisture content after pre-wetting and stacking into a web is 40%.

[0053] S3-2, placing the composite fiber web into a spunlacing machine, and forming a 3D three-dimensional fiber web with a wave texture through a high-pressure jet spunlacing row arranged in a wave shape; the specification of the spunlacing needle plate used is 0.8 mm, and the distance between adjacent water needles is 1.6 mm; the water outlet pressure of the spunlacing head in step S3 reaches 80 bar;

[0054] S4, drying and molding

[0055] The 3D three-dimensional structure fiber web obtained in step S3 is heated and dried, and fixed-point reinforcement is performed during the drying process. After completion, a 3D three-dimensional spunlace net finished product is obtained; the drying temperature is 100°C; and the hot rolling temperature is 112°C.

[0056] Example 2

[0057] The difference between this embodiment and embodiment 1 is that the raw material component ratios of the short fiber material and the long fiber material in step S1 are different. The short fiber material is composed of polytetrafluoroethylene fiber, bamboo charcoal fiber, and basalt fiber in a mass ratio of 2:3:1, and the long fiber material is composed of polypropylene fiber, viscose fiber, and cotton fiber in a mass ratio of 3:1:1; the short fiber material has a fineness of 15D, a fiber length of 55mm, and a curl elasticity of 70-80%.

[0058] Example 3

[0059] The difference between this embodiment and embodiment 1 is that the raw material component ratios of the short fiber material and the long fiber material in step S1 are different. The short fiber material is composed of polytetrafluoroethylene fiber, bamboo charcoal fiber, and basalt fiber in a mass ratio of 2:5:1, and the long fiber material is composed of polypropylene fiber, viscose fiber, and cotton fiber in a mass ratio of 3:1:0.5; the short fiber material has a fineness of 10D, a fiber length of 10mm, and a curl elasticity of 70-80%.

[0060] Example 4

[0061] The difference between this embodiment and embodiment 1 is that the carding machine parameters in step S2 are different, the feeding speed is 0.5 m / min, the cylinder speed is 800 m / min, and the output fiber web speed is 51 m / min.

[0062] Example 5

[0063] The difference between this embodiment and embodiment 1 is that the carding machine parameters in step S2 are different, the feeding speed is 0.8 m / min, the cylinder speed is 850 m / min, and the output fiber web speed is 55 m / min.

[0064] Example 6

[0065] The difference between this embodiment and embodiment 1 is that the moisture content after pre-wetting in step S3 is different, and the moisture content after pre-wetting and stacking into a web is 35%.

[0066] Example 7

[0067] The difference between this embodiment and embodiment 1 is that the moisture content after pre-wetting in step S3 is different, and the moisture content after pre-wetting and stacking into a web is 45%.

[0068] Example 8

[0069] The difference between this embodiment and embodiment 1 is that the parameters of the water jet equipment in step S3 are set differently, the specification of the water jet needle plate used is 0.5 mm, and the spacing between adjacent water needles is 1.5 mm; the water outlet pressure of the water jet head in step S3 reaches 75 bar.

[0070] Example 9

[0071] The difference between this embodiment and embodiment 1 is that the parameters of the water jet equipment in step S3 are set differently, the specification of the needle plate used for the water jet is 1 mm, and the spacing between adjacent water needles is 2 mm; the water outlet pressure of the water jet head in step S3 reaches 85 bar.

[0072] Example 10

[0073] The difference between this embodiment and embodiment 1 is that the temperature parameters in step S4 are set differently, the drying temperature is 95°C; and the hot rolling temperature is 115°C.

[0074] Embodiment 11

[0075] The difference between this embodiment and embodiment 1 is that the temperature parameters in step S4 are set differently, the drying temperature is 105°C; and the hot rolling temperature is 110°C.

[0076] Example 12

[0077] The difference between this embodiment and embodiment 1 is that a treatment agent accounting for 10% of the mass of the water is added to the water mist, and the treatment agent is prepared by mixing polyvinyl alcohol, glycidyl neodecanoate, and silicone quaternary ammonium salt in a mass ratio of 5:2:1.

[0078] Embodiment 13

[0079] The difference between this embodiment and embodiment 12 is that the treatment agent is prepared by mixing polyvinyl alcohol, glycidyl neodecanoate, and quaternary ammonium silicone salt in a mass ratio of 5:2:0.8.

[0080] Embodiment 14

[0081] The difference between this embodiment and embodiment 12 is that the treatment agent is prepared by mixing polyvinyl alcohol, glycidyl neodecanoate, and silicone quaternary ammonium salt in a mass ratio of 5:2:2.

[0082] Embodiment 15

[0083] The difference between this embodiment and embodiment 12 is that the fixed-point reinforcement method in step S4 is: starting from room temperature, heating and drying at a heating rate of 5°C / min until the temperature reaches 100°C and then maintained; when the moisture content is dried to 18%, a constant temperature first fixed-point hot rolling reinforcement is carried out, and then the temperature is cooled to room temperature at a cooling rate of 6°C / min and continued to dry; when the moisture content is dried to 8%, a second fixed-point hot rolling reinforcement is carried out; both the first fixed-point hot rolling reinforcement and the second fixed-point hot rolling reinforcement methods are: a row of hot rolling reinforcement is carried out using rolling wheel steel thorns every two rows of wavy patterns, and the density of the rolling wheel steel thorns is 1 / 2 of the density of the water-jet needles.

[0084] Example 16

[0085] The difference between this embodiment and Embodiment 15 is that when drying to a moisture content of 15%, a constant temperature fixed-point hot rolling reinforcement is carried out, and then the temperature is lowered to room temperature at a rate of 8°C / min to continue drying; when drying to a moisture content of 10%, a second fixed-point hot rolling reinforcement is carried out.

[0086] Embodiment 17

[0087] The difference between this embodiment and embodiment 15 is that when drying to a moisture content of 15%, a constant temperature fixed-point hot rolling reinforcement is carried out, and then the temperature is lowered to room temperature at a rate of 5°C / min to continue drying; when drying to a moisture content of 6%, a second fixed-point hot rolling reinforcement is carried out.

[0088] Experimental example

[0089] In the technical index test, the air permeability is tested with reference to the national standard GB / T5453-1997 "Determination of air permeability of textile fabrics". Each sample is tested 5 times and the average value is taken; the tensile strength MD adopts the GB / T328.9 standard; the antibacterial test sample is Staphylococcus aureus;

[0090] 1. The test results of the products obtained in Examples 1 to 3, Example 12, Example 15 and the comparative examples are as follows:

[0091] 1. Explore the impact of different raw material components on product performance;

[0092] Comparative Example 1: A long fiber material composed of polypropylene fiber, viscose fiber and cotton fiber in a mass ratio of 3:1:0.8 was used; no short fiber material was added to the air-laid process, and the rest of the treatment was the same as in Example 1;

[0093] Comparative Example 2: The commercially available 3D nonwoven fabric XK06 of Xingtai was used for testing;

[0094] As shown in Table 1;

[0095] Table 1 Product performance of different raw material components

[0096]

[0097] It can be seen from Table 1 that the 3D spunlace mesh products obtained in Example 12 and Example 15 have better performance. By comparing Example 1, Example 2 and Example 3, it can be found that the component ratio in Example 1 is the best; by comparing Example 1 with Example 12, it can be concluded that by pre-wetting with the treatment agent of Example 12, the breaking strength and antibacterial rate of the product can be effectively improved; by comparing Example 12 with Example 15, it can be seen that the breaking strength and elongation at break of the product are improved by the reinforcement method in Example 15; by comparing Example 1, Comparative Example 1 and Comparative Example 2, it can be concluded that the performance of the components in Example 1 are more preferred; comprehensively speaking, Example 15 is better.

[0098] 2. The air permeability and elongation at break of the products obtained in Examples 4 to 17 were tested respectively, and the test results are as follows:

[0099] 2. Explore the impact of different parameters on product performance;

[0100] Take Example 1 and Examples 4 to 11 for comparison, as shown in Table 2;

[0101] Table 2 Product performance of different carding machine parameters

[0102] parameter Air permeability mm / s Elongation at break % Example 1 579 304 Example 4 570 293 Example 5 573 296 Example 6 568 282 Example 7 572 297 Example 8 571 288 Example 9 580 276 Example 10 568 291 Embodiment 11 576 294

[0103] As can be seen from Table 2, by comparing Example 1, Example 2 and Example 3, it can be found that the carding machine parameters in Example 1 are optimal; by comparing Example 1, Example 6 and Example 7, it can be found that the water content after pre-wetting in Example 1 is more preferred; by comparing Example 1, Example 8 and Example 9, it can be found that the spunlace equipment parameters in Example 1 are preferred; by comparing Example 1, Example 10 and Example 11, it can be found that the drying temperature and hot rolling temperature in Example 1 are more preferred. Overall, the parameter settings in Example 1 are better.

[0104] 3. Explore the effects of different pre-wetting treatment agents on product performance;

[0105] Examples 12 to 14 are taken as comparison, as shown in Table 3;

[0106] Table 3 Product performance of different moisture contents after pre-wetting

[0107] parameter Air permeability mm / s Elongation at break % Example 12 580 342 Embodiment 13 577 336 Embodiment 14 575 340

[0108] As can be seen from Table 3, by comparing Example 12, Example 13 and Example 14, it can be found that the distribution ratio of the treatment agent group in Example 12 is optimal.

[0109] 4. Explore the impact of different reinforcement methods on product performance;

[0110] Comparative Example 3: When the moisture content is dried to 18%, a fixed-point hot rolling reinforcement is performed at a constant temperature, and the rest of the treatment is the same as in Example 15;

[0111] Examples 15 to 17 are taken as comparison, as shown in Table 4;

[0112] Table 4 Product performance of different moisture contents after pre-wetting

[0113]

[0114]

[0115] As can be seen from Table 4, by comparing Example 15, Example 16 and Example 17, it can be found that the reinforcement processing parameters in Example 15 are better, and by comparing Example 15 with Comparative Example 3, it can be found that the secondary reinforcement method of Example 15 can further enhance the performance of the product.

Claims

1. A process for preparing a wavy high-permeability 3D spunlace mesh, characterized in that: The following steps are involved: S1. Opening of raw materials: S1-1, respectively select short fiber materials composed of polytetrafluoroethylene fiber, bamboo charcoal fiber, and basalt fiber in a mass ratio of 2:3-5:1, and long fiber materials composed of polypropylene fiber, viscose fiber, and cotton fiber in a mass ratio of 3:1:0.5-1; S1-2, respectively opening the short fiber material and the long fiber material by using an opening machine; after opening, sending the opened materials to a multi-bin cotton blending machine for blending, and after blending, obtaining short mixed fiber bundles and long mixed fiber bundles respectively; S2. Making fiber web: The long mixed fiber bundle obtained in step S1 is placed in a roller carding machine for carding, and the long mixed fiber bundle is carded and woven into a first thin web; the short mixed fiber bundle is sent to an air flow carding machine for carding to form a second thin web; S3, 3D spunlace patterning: S3-1, pre-wetting the first thin web and the second thin web and stacking them into a web, the number of stacking layers is 3, the second thin web is placed between the two first thin webs, and after the stacking is completed, a composite fiber web is obtained; The pre-wetting treatment method is: using a spray humidifier to spray water mist on each first thin web and the second thin web for pre-wetting, the sprayed particles are 0.02-0.1 mm water particles, and the water content of the composite fiber web after pre-wetting and stacking into a web is 35-45%; The water mist is added with a treatment agent accounting for 10% of the water mass, and the treatment agent is prepared by mixing polyvinyl alcohol, neodecanoic acid glycidyl ester, and organosilicon quaternary ammonium salt in a mass ratio of 5:2:0.8~2; S3-2, placing the composite fiber web into a spunlacing machine, and forming a 3D three-dimensional fiber web with a wave texture through high-pressure jet spunlacing rows arranged in a wave shape; S4, drying and molding The 3D three-dimensional structure fiber web obtained in step S3 is heated and dried, and fixed-point reinforcement is performed during the drying process, and a 3D three-dimensional spunlace net finished product is obtained after completion; The fixed-point reinforcement method is: starting from room temperature, heating and drying at a heating rate of 5°C / min, until the temperature reaches 95-105°C and then maintained; when drying to a moisture content of 15-20%, a constant temperature first fixed-point hot rolling reinforcement is carried out, and then the temperature is cooled to room temperature at a cooling rate of 5-8°C / min and continued to dry; when drying to a moisture content of 6-10%, a second fixed-point hot rolling reinforcement is carried out; both the first fixed-point hot rolling reinforcement and the second fixed-point hot rolling reinforcement methods are: a row of hot rolling reinforcement is carried out using rolling wheel steel thorns every two rows of wavy patterns, and the density of the rolling wheel steel thorns is 1 / 2 of the density of the water-jet needles.

2. The process for preparing a wavy high-permeability 3D spunlace mesh according to claim 1, characterized in that: The short fiber material in step S1 has a fineness of 10-15D, a fiber length of 10-55 mm, and a curl elasticity of 70-80%.

3. The process for preparing a wavy high-permeability 3D spunlace mesh according to claim 1, characterized in that: In step S1, the spacing of the needle teeth between the licker-in rollers of the opener is 1-1.5 cm, the licker-in roller speed is 110-115 r / min, and the fan speed is 1500-1800 r / min.

4. The process for preparing a wavy high-permeability 3D spunlace mesh according to claim 1, characterized in that: The feeding speed of the roller carding machine in step S2 is 0.5-0.8 m / min, the cylinder speed is 800-850 m / min, and the output fiber web speed is 51-55 m / min; the suction fan coefficient of the airflow carding machine is 85%.

5. The process for preparing a wavy high-permeability 3D spunlace mesh according to claim 1, characterized in that: The specification of the needle plate of the thorn needle used in step S3 is 0.5-1 mm, and the distance between adjacent needles is 1.5-2 mm.

6. The process for preparing a wavy high-permeability 3D spunlace mesh according to claim 1, characterized in that: In step S3, the water outlet pressure of the water jet head is 75-85 bar.

7. The process for preparing a wavy high-air-permeability 3D spunlace mesh according to claim 1, characterized in that: The hot rolling temperature is 110~115℃.

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