Water-permeable nonwoven fabric and process for producing the same

Abstract

The application relates to the technical field of non-woven fabrics, and particularly discloses a water-permeable non-woven fabric and a preparation process thereof. The water-permeable non-woven fabric is formed by uniformly applying a hydrophilic agent to polypropylene fibers to form a non-woven fabric, and the hydrophilic agent comprises the following raw materials in parts by weight: 3-6 parts of an anionic surfactant, 15-25 parts of a compound, 8-16 parts of polyvinyl alcohol, 10-20 parts of glycerol, 1-3 parts of a thickening agent and 80-100 parts of water; the preparation process comprises the following steps: polypropylene is melt-extruded, filtered, oil is extracted, drawn, cooled, formed, compacted and compression-molded to obtain a non-woven fabric primary product; the anionic surfactant, the compound, the polyvinyl alcohol, the glycerol and the thickening agent are put into water, uniformly mixed and a hydrophilic agent is obtained; the hydrophilic agent is uniformly applied to the non-woven fabric primary product, and dried to obtain the water-permeable non-woven fabric. The water-permeable non-woven fabric has the advantages of improving the water permeability of the non-woven fabric through the synergistic effect of the raw materials.

Description

Technical Field

[0001] This application relates to the field of nonwoven fabric technology, and in particular to a water-permeable nonwoven fabric and its preparation process. Background Technology

[0002] Nonwoven fabric, also known as non-woven cloth, needle-punched cotton, needle-punched nonwoven fabric, etc., is made by orienting or randomly arranging short textile fibers or filaments to form a fiber web structure, and then reinforcing it using mechanical, thermal bonding, or chemical methods. Compared with traditional textiles, it has the advantages of shorter process flow, faster production speed, higher output, lower cost, and wider application. It also has the advantages of being breathable, flexible, lightweight, flame-retardant, non-toxic, odorless, and inexpensive.

[0003] Nonwoven fabrics made from polypropylene fibers, due to the characteristics of their raw materials, have a dry feel in contact with the skin and are comfortable to the touch, making them suitable for use as disposable diapers, incontinence pads, and other hygiene products. However, these nonwoven fabrics require high water permeability. Because polypropylene fibers are hydrophobic, the water permeability of the nonwoven fabric is poor, affecting the usability of the disposable diapers or incontinence pads produced. Summary of the Invention

[0004] To improve the water permeability of nonwoven fabrics, this application provides a water-permeable nonwoven fabric and its preparation process.

[0005] In the first aspect, this application provides a water-permeable nonwoven fabric, which adopts the following technical solution:

[0006] A water-permeable nonwoven fabric is formed by uniformly coating a hydrophilic agent onto polypropylene fibers. The hydrophilic agent comprises the following raw materials in parts by weight: 3-6 parts of anionic surfactant, 15-25 parts of a complex, 8-16 parts of polyvinyl alcohol, 10-20 parts of glycerin, 1-3 parts of a thickener, and 80-100 parts of water; wherein the complex is a compound of amino-terminated trimethylolpropane tripropylene glycol ether and modified polyether silicone oil.

[0007] By adopting the above technical solution, the permeable nonwoven fabric of this application, through the synergistic effect between various raw materials, can not only maintain the good softness of the nonwoven fabric, but also improve the water permeability of the nonwoven fabric, wherein the water contact angle is 50.2°-64.6°, the water retention rate is 63.3-85.6%, and the softness is 23.2-23.5mN.

[0008] Nonwoven fabric is made of polypropylene fibers, and a hydrophilic agent is evenly coated onto the nonwoven fabric to improve its water permeability. Anionic surfactants have hydrophilic groups such as sulfonic acid groups, which have excellent wetting and penetrating properties; polyvinyl alcohol is a polymer with strong hydrophilicity, and glycerin also has extremely strong hydrophilicity; thickeners can increase viscosity and consistency. Adding anionic surfactants, polyvinyl alcohol, and glycerin to the raw materials of the hydrophilic agent, and then coating the hydrophilic agent onto the nonwoven fabric, can improve the water permeability of the nonwoven fabric.

[0009] The composite is a mixture of amino-terminated trimethylolpropane tripropylene glycol ether and modified polyether silicone oil. Modified polyether silicone oil is an organosilicon nonionic surfactant with a polyether segment. Since the polyether segment is a hydrophilic group, modified polyether silicone oil also exhibits strong hydrophilicity, which can improve the moisture absorption function of nonwoven fabrics. When applied to nonwoven fabrics, modified polyether silicone oil can improve their water permeability. However, adding modified polyether silicone oil to nonwoven fabrics can reduce their softness. Since nonwoven fabrics are mainly used for disposable diapers or pads and come into direct contact with the skin, maintaining their softness is crucial. Therefore, combining amino-terminated trimethylolpropane tripropylene glycol ether and modified polyether silicone oil can improve the softness of the modified polyether silicone oil. Furthermore, with the increase in the number of ether segments and hydroxyl groups, the hydrophilicity is further enhanced, further improving the water permeability of the nonwoven fabric.

[0010] Preferably, the composite is prepared by the following method: modified polyether silicone oil and amino-terminated trimethylolpropane tripropylene glycol ether are placed in isopropanol, mixed evenly, heated to a higher temperature, reacted, and distilled under reduced pressure to obtain the composite.

[0011] Furthermore, the composite is prepared by the following method: modified polyether silicone oil and amino-terminated trimethylolpropane tripropylene glycol ether are placed in isopropanol, mixed evenly, heated and reacted for 5-7 hours, and then distilled under reduced pressure to obtain the composite; wherein the amount of isopropanol added is 20-40 wt% of the modified polyether silicone oil.

[0012] By adopting the above technical solution and using the above preparation method to prepare the composite, the two can be better combined, making it easier for them to play their role and helping to improve the water permeability of nonwoven fabric.

[0013] Preferably, the weight ratio of the modified polyether silicone oil and the amino-terminated trimethylolpropane tripropylene glycol ether is 1:(0.8-1.6).

[0014] Insufficient addition of amino-terminated trimethylolpropane tripropylene glycol ether (MTGEE) fails to adequately improve the non-softness of the modified polyether silicone oil, nor does it exhibit optimal hydrophilicity. Excessive addition of MTGEE improves softness, but ceases to enhance hydrophilicity, resulting in material waste. By employing the above-mentioned technical solution, when the amounts of modified polyether silicone oil and MTGEE are within the specified range, both softness and the hydrophilicity of the nonwoven fabric can be improved.

[0015] Preferably, the reaction temperature is 70-90℃.

[0016] By adopting the above technical solution, the reaction temperature is relatively low, making it difficult for the ring-opening reaction to occur during the reaction, resulting in a lower viscosity of the composite. Appropriately increasing the temperature is beneficial to the ring-opening reaction, which facilitates the preparation of the composite and thus helps to improve the water permeability of the nonwoven fabric.

[0017] Preferably, the modified polyether silicone oil is prepared by the following method: hydrogen-terminated silicone oil and allyl glycidyl ether are placed in isopropanol, mixed evenly, heated, a catalyst is added, the reaction is carried out, the temperature is raised again, the reaction is stopped after a period of time, and the modified polyether silicone oil is obtained by vacuum distillation.

[0018] Furthermore, the modified polyether silicone oil is prepared by the following method: hydrogen-terminated silicone oil and allyl glycidyl ether are placed in isopropanol, mixed evenly, heated to 70-90℃, catalyst is added, reacted for 5-10 min, heated again to 110-130℃, and the reaction is stopped after 3-5 h. The modified polyether silicone oil is obtained by vacuum distillation.

[0019] The amount of isopropanol added is 30-40 wt% of the terminal hydrogen silicone oil.

[0020] By adopting the above technical solution and using the above preparation method to prepare modified polyether silicone oil, it is easier to carry out the hydrosilylation reaction, which facilitates the preparation of modified polyether silicone oil and helps to improve the hydrophilicity of nonwoven fabrics.

[0021] Preferably, the weight ratio of the terminal hydrogen silicone oil and allyl glycidyl ether is 1:(2-2.4).

[0022] Insufficient addition of allyl glycidyl ether hinders the optimal hydrosilylation reaction, leading to waste of terminal hydrogen silicone oil and poor hydrophilicity in the resulting modified polyether silicone oil. Conversely, excessive addition of allyl glycidyl ether results in further waste when the reaction reaches saturation. By employing the above-mentioned technical solution, when the amounts of terminal hydrogen silicone oil and allyl glycidyl ether are within the specified range, modified polyether silicone oil can be obtained more effectively, facilitating the improvement of the water permeability of nonwoven fabrics.

[0023] Preferably, the anionic surfactant is one or more of sodium lauryl ether sulfate, sodium dodecylbenzene sulfonate, and sodium lauroyl sarcosinate.

[0024] More preferably, the anionic surfactant is a mixture of sodium lauryl ether sulfate, sodium dodecylbenzene sulfonate, and sodium lauroyl sarcosinate, and the weight ratio of sodium lauryl ether sulfate, sodium dodecylbenzene sulfonate, and sodium lauroyl sarcosinate is 1:1:1.

[0025] By adopting the above technical solution, sodium lauryl ether sulfate, sodium dodecylbenzene sulfonate, and sodium lauroyl sarcosinate are used as anionic surfactants. These surfactants have hydrophilic groups, which can reduce the contact angle of nonwoven fabrics and significantly improve the hydrophilicity of nonwoven fabrics. Through the synergistic effect of the three, the water permeability of nonwoven fabrics can be improved.

[0026] Preferably, the thickener is one or more of polyethylene glycol distearate, methylcellulose, and casein.

[0027] By adopting the above technical solution and limiting the thickener, the viscosity of the hydrophilic agent can be improved, which facilitates the preparation of the hydrophilic agent.

[0028] Secondly, this application provides a process for preparing a water-permeable nonwoven fabric, which adopts the following technical solution:

[0029] A process for preparing a water-permeable nonwoven fabric includes the following steps:

[0030] S1: Polypropylene is melt-extruded, filtered, oil-extracted, drawn into fibers, cooled, molded, compacted, and compressed to obtain the initial nonwoven fabric product; S2: Anionic surfactant, complex, polyvinyl alcohol, glycerin, and thickener are placed in water and mixed evenly to obtain a hydrophilic agent;

[0031] S3: Apply the hydrophilic agent evenly to the nonwoven fabric sample, dry it, and obtain a water-permeable nonwoven fabric.

[0032] Furthermore, a process for preparing a water-permeable nonwoven fabric includes the following steps:

[0033] S1: Polypropylene is melt-extruded at a temperature of 230-240℃, filtered and oil-extracted, drawn into fibers, cooled by a fan with a flow rate of 550-600, then molded and compacted at a temperature of 135-145℃, and compressed and shaped at a temperature of 155-160℃ and a pressure of 4-5kg to obtain the initial nonwoven fabric product.

[0034] S2: Add anionic surfactant, complex, polyvinyl alcohol, glycerin, and thickener to water and mix well to obtain a hydrophilic agent;

[0035] S3: Apply the hydrophilic agent evenly to the nonwoven fabric sample, dry it, and obtain a water-permeable nonwoven fabric.

[0036] Preferably, the amount of hydrophilic agent applied in step S3 is 20-40 wt% of polypropylene.

[0037] By adopting the above technical solution and using the above preparation method, a water-permeable nonwoven fabric is prepared. First, a nonwoven fabric primary product is prepared using polypropylene. Then, a hydrophilic agent is prepared. Finally, the hydrophilic agent is uniformly coated on the nonwoven fabric to form a water-permeable nonwoven fabric. The amount of hydrophilic agent coated is limited to better improve the water permeability of the nonwoven fabric.

[0038] In summary, this application includes at least one of the following beneficial technical effects:

[0039] 1. Because this application uses a composite material made of amino-terminated trimethylolpropane tripropylene glycol ether and modified polyether silicone oil, the modified polyether silicone oil has a polyether segment and strong hydrophilicity, which can improve the moisture absorption function of nonwoven fabric. The application of modified polyether silicone oil in nonwoven fabric can improve the water permeability of nonwoven fabric. However, the addition of modified polyether silicone oil to nonwoven fabric will reduce the softness of nonwoven fabric. After compounding amino-terminated trimethylolpropane tripropylene glycol ether and modified polyether silicone oil, not only can the softness of modified polyether silicone oil be improved, but also, with the increase of ether segment and hydroxyl group, the hydrophilicity is further improved, which further enhances the water permeability of nonwoven fabric. It can reduce the water contact angle to 50.2°, the water retention rate reaches 85.6%, and the softness reaches 23.5mN.

[0040] 2. In this application, sodium lauryl ether sulfate, sodium dodecylbenzene sulfonate, and sodium lauroyl sarcosinate are preferred as anionic surfactants. Through the synergistic effect among the three, the water permeability of the nonwoven fabric can be further improved. Detailed Implementation

[0041] The following provides a more detailed description of this application in conjunction with specific details.

[0042] raw material

[0043] Polyvinyl alcohol has a molecular weight of 44, a melting point >300℃, a boiling point of -14.5℃, and a density of 1.080 g / cm³. 3 Flash point 79℃; amino-terminated trimethylolpropane tripropylene glycol ether, molecular weight 5000, density 0.948 g / cm³ 3 Boiling point >200℃, viscosity at 25℃ 10 mPa·s, flash point 121℃; terminal hydrogen silicone oil molecular weight 5000, viscosity at 25℃ 10000 mPa·s; allyl glycidyl ether molecular weight 114, density 0.962 g / cm³ 3Boiling point 154℃, flash point 48℃; catalyst is castor catalyst, molecular weight 937; thickener is polyethylene glycol distearate, PEG6000DS; polypropylene molecular weight 8000, density 0.91 g / cm³ 3 Melting point 165℃.

[0044] Preparation Example

[0045] Preparation Example 1

[0046] A modified polyether silicone oil is prepared by the following method:

[0047] 2 kg of hydrogen-terminated silicone oil and 4 kg of allyl glycidyl ether were placed in 0.7 kg of isopropanol, mixed evenly, heated to 80 °C, a catalyst was added, and the reaction was carried out for 7 min. The temperature was then raised to 120 °C again, and the reaction was stopped after 4 h. The mixture was then distilled under reduced pressure to obtain modified polyether silicone oil.

[0048] Preparation Example 2

[0049] A modified polyether silicone oil differs from Preparation Example 1 in that the amount of allyl glycidyl ether added is different; in Preparation Example 2, the amount of allyl glycidyl ether added is 4.4 kg.

[0050] Preparation Example 3

[0051] A modified polyether silicone oil differs from Preparation Example 1 in that the amount of allyl glycidyl ether added is different; in Preparation Example 3, the amount of allyl glycidyl ether added is 4.8 kg.

[0052] Preparation Example 4

[0053] A complex prepared by the following method:

[0054] 2 kg of the modified polyether silicone oil prepared in Preparation Example 1 and 1.6 kg of amino-terminated trimethylolpropane tripropylene glycol ether were placed in 0.7 kg of isopropanol, mixed evenly, heated to 70 °C, reacted for 6 h, and then distilled under reduced pressure to obtain the composite.

[0055] Preparation Example 5

[0056] A composite compound differs from Preparation Example 4 in that the amount of amino-terminated trimethylolpropane tripropylene glycol ether added is different; in Preparation Example 5, the amount of amino-terminated trimethylolpropane tripropylene glycol ether added is 2.4 kg.

[0057] Preparation Example 6

[0058] A composite compound differs from Preparation Example 4 in that the amount of amino-terminated trimethylolpropane tripropylene glycol ether added is different; in Preparation Example 6, the amount of amino-terminated trimethylolpropane tripropylene glycol ether added is 3.2 kg.

[0059] Preparation Example 7

[0060] A composite compound differs from Preparation Example 4 in that the amount of amino-terminated trimethylolpropane tripropylene glycol ether added is different; in Preparation Example 6, the amount of amino-terminated trimethylolpropane tripropylene glycol ether added is 0.5 kg.

[0061] Preparation Example 8

[0062] A composite compound differs from Preparation Example 4 in that the amount of amino-terminated trimethylolpropane tripropylene glycol ether added is different; in Preparation Example 6, the amount of amino-terminated trimethylolpropane tripropylene glycol ether added is 10 kg.

[0063] Preparation Example 9

[0064] A composite, which differs from Preparation Example 5 in that the modified polyether silicone oil in the composite comes from a different source; the modified polyether silicone oil in Preparation Example 9 was prepared using Preparation Example 2.

[0065] Preparation Example 10

[0066] A composite, which differs from Preparation Example 5 in that the modified polyether silicone oil in the composite comes from a different source; the modified polyether silicone oil in Preparation Example 10 was prepared using Preparation Example 3.

[0067] Preparation Example 11

[0068] A complex, which differs from Preparation Example 7 in that the reaction temperature is different; the reaction temperature in Preparation Example 11 is 80°C.

[0069] Preparation Example 12

[0070] A complex, which differs from Preparation Example 7 in that the reaction temperature is different; the reaction temperature in Preparation Example 12 is 90°C.

[0071] Example

[0072] Example 1

[0073] A water-permeable nonwoven fabric, wherein the raw material ratio of the hydrophilic agent is shown in Table 1.

[0074] A process for preparing a water-permeable nonwoven fabric includes the following steps:

[0075] S1: 10 kg of polypropylene is melt-extruded at 235°C, filtered, oil-extracted, and drawn into fibers. It is then cooled by a fan with a flow rate of 570, molded and compacted at 140°C, and compressed and shaped at 158°C and 4.5 kg of pressure to obtain the initial nonwoven fabric product.

[0076] S2: The anionic surfactant, the complex prepared in Preparation Example 4, polyvinyl alcohol, glycerin, and thickener are placed in water and mixed evenly to obtain a hydrophilic agent;

[0077] S3: Apply 3.5 kg of hydrophilic agent evenly to the nonwoven fabric sample, dry it, and obtain a water-permeable nonwoven fabric.

[0078] Examples 2-5

[0079] A water-permeable nonwoven fabric differs from Example 1 in that the raw material ratio of the hydrophilic agent is different, as shown in Table 1.

[0080] Table 1. Dosage of each raw material in the hydrophilic agent in Examples 1-5 (unit: kg)

[0081]

[0082] Example 6

[0083] A water-permeable nonwoven fabric, which differs from Example 4 in that the source of the composite in the nonwoven fabric is different; the composite in Example 6 was prepared using Preparation Example 5.

[0084] Example 7

[0085] A water-permeable nonwoven fabric, which differs from Example 4 in that the source of the composite in the nonwoven fabric is different; the composite in Example 7 was prepared using Preparation Example 6.

[0086] Example 8

[0087] A water-permeable nonwoven fabric, which differs from Example 4 in that the source of the composite in the nonwoven fabric is different; the composite in Example 8 was prepared using Preparation Example 7.

[0088] Example 9

[0089] A water-permeable nonwoven fabric, which differs from Example 4 in that the source of the composite in the nonwoven fabric is different; the composite in Example 9 was prepared using Preparation Example 8.

[0090] Example 10

[0091] A water-permeable nonwoven fabric, which differs from Example 4 in that the source of the composite in the nonwoven fabric is different; the composite in Example 10 was prepared using Preparation Example 9.

[0092] Example 11

[0093] A water-permeable nonwoven fabric, which differs from Example 4 in that the source of the composite in the nonwoven fabric is different. The composite in Example 11 was prepared using Preparation Example 10.

[0094] Example 12

[0095] A water-permeable nonwoven fabric, which differs from Example 4 in that the source of the composite in the nonwoven fabric is different. The composite in Example 12 was prepared using Preparation Example 11.

[0096] Example 13

[0097] A water-permeable nonwoven fabric, which differs from Example 4 in that the source of the composite in the nonwoven fabric is different. The composite in Example 13 was prepared using Preparation Example 12.

[0098] Comparative Example

[0099] Comparative Example 1

[0100] A water-permeable nonwoven fabric, which differs from Example 1 in that no complex is added to the hydrophilic agent.

[0101] Comparative Example 2

[0102] A water-permeable nonwoven fabric, which differs from Example 1 in that the complex in the hydrophilic agent is replaced in equal amounts with modified polyether silicone oil.

[0103] Comparative Example 3

[0104] A type of water-permeable nonwoven fabric differs from Example 1 in that the complex in the hydrophilic agent is replaced in equal amounts with amino-terminated trimethylolpropane tripropylene glycol ether.

[0105] Performance testing

[0106] The following performance tests were performed on the nonwoven fabrics in Examples 1-13 and Comparative Examples 1-3:

[0107] Water contact angle: The water contact angle of the nonwoven fabric was measured using a contact angle tester, and the test results are shown in Table 2.

[0108] Water retention rate: Take nonwoven fabric samples of the same thickness and cut them into 10cm×10cm squares (weight per unit area: 20g / m²). 2 The nonwoven fabrics were soaked in 10L of distilled water for 30 minutes. The water retention rate was measured and the results are shown in Table 2.

[0109] Softness: The softness of the nonwoven fabric was determined according to GB / T8942-2016 "Determination of Paper Softness". The test results are shown in Table 2.

[0110] Table 2 Detection Results

[0111]

[0112] As can be seen from Table 2, the permeable nonwoven fabric of this application, through the synergistic effect between various raw materials, can not only maintain the good softness of the nonwoven fabric, but also improve the water permeability of the nonwoven fabric. The water contact angle is 50.2°-64.6°, the water retention rate is 63.3-85.6%, and the softness is 23.2-23.5mN.

[0113] Combining Example 1 and Comparative Examples 1-3, it can be seen that the water contact angle of the nonwoven fabric in Example 1 is 61.5°, the water retention rate is 66.5%, and the softness is 23.2 mN, which is better than that in Comparative Examples 1-3. This indicates that it is more suitable to add a complex composed of modified polyether silicone oil and amino-terminated trimethylolpropane tripropylene glycol ether to the raw materials of the nonwoven fabric hydrophilic agent. This not only enables the nonwoven fabric to maintain good softness, but also reduces the water contact angle and increases the water retention rate, thereby improving the water permeability of the nonwoven fabric.

[0114] As can be seen from Examples 1-5, the water contact angle of the nonwoven fabric in Example 4 is 54.2°, the water retention rate is 75.6%, and the softness is 23.3mN, which is better than other examples. This indicates that the amount of compound added in Example 4 is more appropriate. It can not only maintain the good softness of the nonwoven fabric, but also reduce the water contact angle and increase the water retention rate, thereby improving the water permeability of the nonwoven fabric.

[0115] As can be seen from Examples 4 and 6-9, the water contact angle of the nonwoven fabric in Example 6 is 53.4°, the water retention rate is 79.9%, and the softness is 23.5mN, which is better than other examples. This indicates that the amount of amino-terminated trimethylolpropane tripropylene glycol ether added to the composite is more suitable as in Preparation Example 5, which not only enables the nonwoven fabric to maintain good softness but also improves the water permeability of the nonwoven fabric.

[0116] As can be seen from Examples 6 and 10-11, the water contact angle of the nonwoven fabric in Example 10 is 51.7°, the water retention rate is 82.1%, and the softness is 23.4 mN, which is better than other examples. This indicates that the modified polyether silicone oil in the composite prepared by Example 2 is more suitable, as it can not only maintain the good softness of the nonwoven fabric, but also improve the water permeability of the nonwoven fabric.

[0117] As can be seen from Examples 10 and 12-13, the water contact angle of the nonwoven fabric in Example 12 is 50.2°, the water retention rate is 85.6%, and the softness is 23.5mN, which is better than other examples. This indicates that the reaction temperature of the composite material at 80°C in Preparation Example 11 is more suitable, which not only allows the nonwoven fabric to maintain good softness, but also improves the water permeability of the nonwoven fabric.

[0118] The embodiments described above are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A water-permeable nonwoven fabric, characterized in that: It is a water-permeable nonwoven fabric formed by uniformly coating a hydrophilic agent onto polypropylene fibers. The hydrophilic agent comprises the following raw materials in parts by weight: 3-6 parts of anionic surfactant, 15-25 parts of a complex, 8-16 parts of polyvinyl alcohol, 10-20 parts of glycerin, 1-3 parts of thickener, and 80-100 parts of water; wherein the complex is composed of amino-terminated trimethylolpropane tripropylene glycol ether and modified polyether silicone oil; the weight ratio of the modified polyether silicone oil and the amino-terminated trimethylolpropane tripropylene glycol ether is 1:(0.8-1.6). The modified polyether silicone oil is prepared by the following method: hydrogen-terminated silicone oil and allyl glycidyl ether are placed in isopropanol, mixed evenly, heated, a catalyst is added, the reaction is carried out, the temperature is raised again, the reaction is stopped after a period of time, and the modified polyether silicone oil is obtained by vacuum distillation.

2. The permeable nonwoven fabric according to claim 1, characterized in that: The composite was prepared by the following method: modified polyether silicone oil and amino-terminated trimethylolpropane tripropylene glycol ether were placed in isopropanol, mixed evenly, heated to a higher temperature, reacted, and distilled under reduced pressure to obtain the composite.

3. The permeable nonwoven fabric according to claim 2, characterized in that: The reaction temperature is 70-90℃.

4. The permeable nonwoven fabric according to claim 1, characterized in that: The weight ratio of the terminal hydrogen silicone oil and allyl glycidyl ether is 1:(2-2.4).

5. The permeable nonwoven fabric according to claim 1, characterized in that: The anionic surfactant is one or more of sodium lauryl ether sulfate, sodium dodecylbenzene sulfonate, and sodium lauroyl sarcosinate.

6. The permeable nonwoven fabric according to claim 1, characterized in that: The thickener is one or more of polyethylene glycol distearate, methylcellulose, and casein.

7. A process for preparing a permeable nonwoven fabric as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Polypropylene is melt-extruded, filtered, oil-extracted, drawn into fibers, cooled, shaped, compacted, and compressed to obtain the initial nonwoven fabric product; S2: Add anionic surfactant, complex, polyvinyl alcohol, glycerin, and thickener to water and mix well to obtain a hydrophilic agent; S3: Apply the hydrophilic agent evenly to the nonwoven fabric sample, dry it, and obtain a water-permeable nonwoven fabric.

8. The preparation process of a water-permeable nonwoven fabric according to claim 7, characterized in that: The amount of hydrophilic agent applied in step S3 is 20-40 wt% of polypropylene.

Images