Porous composite non-woven fabric with high water resistance and preparation method of porous composite non-woven fabric

Abstract

The invention provides a porous composite non-woven fabric with high water resistance and a preparation method thereof, and relates to the technical field of preparation of composite non-woven fabrics. The porous high-water-resistance composite non-woven fabric comprises a fabric base layer, first protective film layers are arranged on the upper side and the lower side of the fabric base layer, waterproof layers are arranged on the sides, away from the fabric base layer, of the first protective film layers, and second protective film layers are arranged on the sides, away from the first protective film layers, of the waterproof layers. In the preparation process, the cloth base layer is soaked in a mixed solution of a silane coupling agent, the silane coupling agent can form a first protective film layer on the cloth base layer to protect the cloth base layer, meanwhile, the silane coupling agent is combined with the raw material glass fiber of the cloth base layer, the wear resistance of the glass fiber is improved, and in addition, the wear resistance of the glass fiber is improved. The waterproof layer is coated with the first protective film layer and the second protective film layer, so that the wear resistance of the waterproof layer is improved, and the waterproof performance of the waterproof layer is improved.

Description

Technical Field

[0001] The invention relates to the technical field of composite non-woven fabric preparation, in particular to a porous composite non-woven fabric with strong water barrier properties and a preparation method thereof. Background Art

[0002] Non-woven fabrics, also known as non-woven fabrics, are made of directional or random fibers. They are a new generation of environmentally friendly materials with the characteristics of moisture-proof, breathable, flexible, light, non-combustible, easy to decompose, non-toxic and non-irritating, rich in colors, low price, and recyclable. For example, polypropylene (PP material) pellets are often used as raw materials, and are produced by a continuous one-step process of high-temperature melting, spinning, laying, hot pressing and winding. At present, non-woven fabrics are widely used, and some of the main fabrics of some clothes are non-woven fabrics.

[0003] In order to improve the waterproof performance of non-woven fabrics, a layer of waterproof coating is set on the surface of the non-woven fabrics. However, after repeated washing, the waterproof coating on the surface of the non-woven fabrics will gradually lose its waterproof effect due to wear. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a porous composite non-woven fabric with strong water-blocking properties and a preparation method thereof, which solves the problem that the existing waterproof non-woven fabric gradually loses its waterproof effect due to wear after being washed many times.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical scheme: a porous composite non-woven fabric with strong water-blocking properties, comprising a fabric base layer, a first protective film layer is provided on the upper and lower sides of the fabric base layer, a waterproof layer is provided on the side of the first protective film layer away from the fabric base layer, and a second protective film layer is provided on the side of the waterproof layer away from the first protective film layer.

[0008] A method for preparing a porous composite nonwoven fabric with strong water barrier properties comprises the following specific steps:

[0009] S1. Prepare the following raw materials in parts by weight: 60-70 parts of polypropylene fiber, 30-40 parts of glass fiber, 5-6 parts of antibacterial agent, 10-20 parts of silane coupling agent, 5-10 parts of talc and 20-30 parts of water;

[0010] S2, firstly, the mixed glass fibers are loosened, then the processed glass fibers are placed in a web laying machine for horizontal cross laying, the laid glass fibers are placed in a carding machine for carding into a fiber web, then treated by a hydroentanglement method, then hydroentangled by a high-pressure nozzle, and finally dried to obtain a fabric base;

[0011] S3, washing and drying the prepared fabric base layer;

[0012] S4, adding the antibacterial agent, silane coupling agent and water into a mixing container and stirring them evenly, then soaking the fabric base layer prepared in S3 into the mixing container for 3-4 hours, and taking it out for natural air drying, thereby forming a first protective film layer;

[0013] S5, using the preparation method in S2 to manufacture the polypropylene fiber into waterproof layers on the upper and lower sides, and washing and drying the waterproof layers;

[0014] S6. Place the naturally air-dried fabric base between the upper and lower waterproof layers and fix them together using a pressing device;

[0015] S7. Put the silane coupling agent, talcum powder and water into another mixing container and mix them evenly. Spray the mixed solution on the waterproof layer using a spraying device. After natural air drying, a second protective film layer can be formed.

[0016] Preferably, the pressure of the water spunlace in S2 is 10-15 MPa, the pressure of the water spunlace by the high-pressure nozzle in S2 is 60-90 MPa, the temperature of the drying in S2 is 70-90° C., and the drying time is 20-30 min.

[0017] Preferably, the ratio of the silane coupling agent to water in the first protective film layer and the second protective film layer is 1:1.

[0018] Preferably, the drying treatment temperature in S3 and S5 is 80-90° C., and the drying time is 20-30 min.

[0019] Preferably, the antibacterial agent is a nanosilver antibacterial agent.

[0020] (III) Beneficial effects

[0021] The present invention provides a porous composite nonwoven fabric with strong water barrier properties and a preparation method thereof.

[0022] Beneficial effects:

[0023] In the preparation process of the present invention, by immersing the fabric base layer in a mixed solution of a silane coupling agent, the silane coupling agent can form a first protective film layer on the fabric base layer to protect the fabric base layer. At the same time, the silane coupling agent is combined with the raw material glass fiber of the fabric base layer, which is beneficial to improving the wear resistance of the glass fiber. In addition, the first protective film layer and the second protective film layer cover the waterproof layer, which improves the wear resistance of the waterproof layer, thereby extending the waterproof performance of the waterproof layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic cross-sectional view of a porous composite nonwoven fabric with strong water-blocking properties proposed by the present invention.

[0025] Among them, 1. fabric base layer; 2. waterproof layer; 3. first protective film layer; 4. second protective film layer. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1:

[0028] like Figure 1 As shown, an embodiment of the present invention provides a porous composite non-woven fabric with strong water-blocking properties, comprising a fabric base layer 1, a first protective film layer 3 is provided on both the upper and lower sides of the fabric base layer 1, a waterproof layer 2 is provided on the side of the first protective film layer 3 away from the fabric base layer 1, and a second protective film layer 4 is provided on the side of the waterproof layer 2 away from the first protective film layer 3;

[0029] The first protective film layer mainly protects the fabric base layer 1 . In addition, the first protective film layer 3 and the second protective film layer 4 cover the waterproof layer 2 , thereby improving the wear resistance of the waterproof layer 2 and extending the waterproof performance of the waterproof layer 2 .

[0030] A method for preparing a porous composite nonwoven fabric with strong water barrier properties comprises the following specific steps:

[0031] S1. Prepare the following raw materials in parts by weight: 60 parts of polypropylene fiber, 30 parts of glass fiber, 5 parts of antibacterial agent, 10 parts of silane coupling agent, 5 parts of talc and 30 parts of water;

[0032] Among them, the use of antibacterial agents can improve the antibacterial ability of the prepared porous water-resistant composite non-woven fabric. During the preparation process of the non-woven fabric, the silane coupling agent can form a protective film on the surface of the non-woven fabric, thereby preventing moisture invasion and enhancing the waterproofness of the fabric. In addition, the silane coupling agent can form a layer of tiny pores on the surface of the non-woven fabric, properly controlling the transfer between gases, liquids and solids, thereby improving the air permeability of the fabric. Finally, the silane coupling agent is combined with the raw material glass fiber of the fabric base layer, which is beneficial to improve the wear resistance of the glass fiber. When the silane coupling agent is used in combination with talcum powder, the wear resistance of the waterproof layer can be improved.

[0033] S2, firstly, the glass fibers mixed into a mass are loosened, and then the processed glass fibers are placed in a web laying machine for horizontal cross laying, and the laid glass fibers are placed in a carding machine for carding into a fiber web, and then treated by a hydroentanglement method, and then hydroentangled by a high-pressure nozzle, and finally dried to obtain a fabric base layer 1;

[0034] S3, washing and drying the prepared fabric base layer 1;

[0035] S4, adding the antibacterial agent, the silane coupling agent and water into a mixing container and stirring them evenly, then placing the fabric base layer 1 prepared in S3 into the mixing container and soaking it for 3 hours, and taking it out to air dry naturally, thereby forming a first protective film layer 3;

[0036] S5, using the preparation method in S2 to manufacture the polypropylene fiber into the waterproof layer 2 on the upper and lower sides, and washing and drying the waterproof layer 2;

[0037] S6, placing the naturally air-dried fabric base layer 1 between the upper and lower waterproof layers 2, and fixing them together using a pressing device;

[0038] S7, putting the silane coupling agent, talcum powder and water into another mixing container and mixing them evenly, and spraying the mixed solution on the waterproof layer 2 using a spraying device, and forming the second protective film layer 4 after natural air drying.

[0039] The water spurt pressure in S2 is 15MPa, the water spurt pressure of the high-pressure nozzle in S2 is 90MPa, the drying temperature in S2 is 70°C, the drying time is 25min, the ratio of silane coupling agent and water in the first protective film layer 3 and the second protective film layer 4 is 1:1, the drying treatment temperature in S3 and S5 is 80°C, the drying time is 25min, and the antibacterial agent is nano silver antibacterial agent.

[0040] Embodiment 2:

[0041] like Figure 1 As shown, an embodiment of the present invention provides a porous composite non-woven fabric with strong water-blocking properties, including a fabric base layer 1, a first protective film layer 3 is provided on the upper and lower sides of the fabric base layer 1, a waterproof layer 2 is provided on the side of the first protective film layer 3 away from the fabric base layer 1, and a second protective film layer 4 is provided on the side of the waterproof layer 2 away from the first protective film layer 3.

[0042] A method for preparing a porous composite nonwoven fabric with strong water barrier properties comprises the following specific steps:

[0043] S1. Prepare the following raw materials in parts by weight: 60 parts of polypropylene fiber, 30 parts of glass fiber, 5 parts of antibacterial agent, 15 parts of silane coupling agent, 7 parts of talc and 30 parts of water;

[0044] S2, firstly, the glass fibers mixed into a mass are loosened, and then the processed glass fibers are placed in a web laying machine for horizontal cross laying, and the laid glass fibers are placed in a carding machine for carding into a fiber web, and then treated by a hydroentanglement method, and then hydroentangled by a high-pressure nozzle, and finally dried to obtain a fabric base layer 1;

[0045] S3, washing and drying the prepared fabric base layer 1;

[0046] S4, adding the antibacterial agent, the silane coupling agent and water into a mixing container and stirring them evenly, then placing the fabric base layer 1 prepared in S3 into the mixing container and soaking it for 3 hours, and taking it out to air dry naturally, thereby forming a first protective film layer 3;

[0047] S5, using the preparation method in S2 to manufacture the polypropylene fiber into the waterproof layer 2 on the upper and lower sides, and washing and drying the waterproof layer 2;

[0048] S6, placing the naturally air-dried fabric base layer 1 between the upper and lower waterproof layers 2, and fixing them together using a pressing device;

[0049] S7, putting the silane coupling agent, talcum powder and water into another mixing container and mixing them evenly, and spraying the mixed solution on the waterproof layer 2 using a spraying device, and forming the second protective film layer 4 after natural air drying.

[0050] The water spurt pressure in S2 is 15MPa, the water spurt pressure of the high-pressure nozzle in S2 is 90MPa, the drying temperature in S2 is 70°C, the drying time is 25min, the ratio of silane coupling agent and water in the first protective film layer 3 and the second protective film layer 4 is 1:1, the drying treatment temperature in S3 and S5 is 80°C, the drying time is 25min, and the antibacterial agent is nano silver antibacterial agent.

[0051] Embodiment three:

[0052] like Figure 1 As shown, an embodiment of the present invention provides a porous composite non-woven fabric with strong water-blocking properties, including a fabric base layer 1, a first protective film layer 3 is provided on the upper and lower sides of the fabric base layer 1, a waterproof layer 2 is provided on the side of the first protective film layer 3 away from the fabric base layer 1, and a second protective film layer 4 is provided on the side of the waterproof layer 2 away from the first protective film layer 3.

[0053] A method for preparing a porous composite nonwoven fabric with strong water barrier properties comprises the following specific steps:

[0054] S1. Prepare the following raw materials in parts by weight: 60 parts of polypropylene fiber, 30 parts of glass fiber, 5 parts of antibacterial agent, 20 parts of silane coupling agent, 10 parts of talc and 30 parts of water;

[0055] S2, firstly, the glass fibers mixed into a mass are loosened, and then the processed glass fibers are placed in a web laying machine for horizontal cross laying, and the laid glass fibers are placed in a carding machine for carding into a fiber web, and then treated by a hydroentanglement method, and then hydroentangled by a high-pressure nozzle, and finally dried to obtain a fabric base layer 1;

[0056] S3, washing and drying the prepared fabric base layer 1;

[0057] S4, adding the antibacterial agent, the silane coupling agent and water into a mixing container and stirring them evenly, then placing the fabric base layer 1 prepared in S3 into the mixing container and soaking it for 3 hours, and taking it out to air dry naturally, thereby forming a first protective film layer 3;

[0058] S5, using the preparation method in S2 to manufacture the polypropylene fiber into the waterproof layer 2 on the upper and lower sides, and washing and drying the waterproof layer 2;

[0059] S6, placing the naturally air-dried fabric base layer 1 between the upper and lower waterproof layers 2, and fixing them together using a pressing device;

[0060] S7, putting the silane coupling agent, talcum powder and water into another mixing container and mixing them evenly, and spraying the mixed solution on the waterproof layer 2 using a spraying device, and forming the second protective film layer 4 after natural air drying.

[0061] The water spurt pressure in S2 is 15MPa, the water spurt pressure of the high-pressure nozzle in S2 is 90MPa, the drying temperature in S2 is 70°C, the drying time is 25min, the ratio of silane coupling agent and water in the first protective film layer 3 and the second protective film layer 4 is 1:1, the drying treatment temperature in S3 and S5 is 80°C, the drying time is 25min, and the antibacterial agent is nano silver antibacterial agent.

[0062] Comparative Example:

[0063] Compared with Example 1, Example 2 and Example 3, the comparative example does not add silane coupling agent and talcum powder, so that the first protective film layer 3 and the second protective film layer 4 are not formed, and other preparation methods are the same.

[0064] The porous composite non-woven fabric with strong water barrier properties was prepared by the preparation methods of Example 1, Example 2, Example 3 and the comparative example, and the prepared non-woven fabric was washed several times and subjected to a waterproof test. The results are shown in Table 1:

[0065] Table 1

[0066]

[0067] According to the data in Table 1, it can be known that the formation of the first protective film layer 3 and the second protective film layer 4 can provide good protection for the waterproof layer 2, thereby avoiding the problem of decreased waterproof effect after repeated washing.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A porous composite nonwoven fabric with strong water barrier properties, comprising a fabric base layer (1), characterized in that: The first protective film layer (3) is provided on both the upper and lower sides of the fabric base layer (1); a waterproof layer (2) is provided on the side of the first protective film layer (3) away from the fabric base layer (1); and a second protective film layer (4) is provided on the side of the waterproof layer (2) away from the first protective film layer (3).

2. A method for preparing a porous composite nonwoven fabric with strong water barrier properties, based on the porous composite nonwoven fabric with strong water barrier properties as claimed in claim 1, characterized in that: The specific steps include: S1. Prepare the following raw materials in parts by weight: 60-70 parts of polypropylene fiber, 30-40 parts of glass fiber, 5-6 parts of antibacterial agent, 10-20 parts of silane coupling agent, 5-10 parts of talc and 20-30 parts of water; S2, firstly, the mixed glass fibers are loosened, then the processed glass fibers are placed in a web laying machine for horizontal cross laying, the laid glass fibers are placed in a carding machine for carding into a fiber web, then treated by a hydroentanglement method, then hydroentangled by a high-pressure nozzle, and finally dried to obtain a fabric base (1); S3, washing and drying the prepared fabric base layer (1); S4, adding an antibacterial agent, a silane coupling agent and water into a mixing container and stirring them evenly, then placing the fabric base layer (1) prepared in S3 into the mixing container and soaking it for 3-4 hours, and taking it out to air dry naturally, thereby forming a first protective film layer (3); S5, using the preparation method in S2 to manufacture the polypropylene fiber into waterproof layers (2) on the upper and lower sides, and washing and drying the waterproof layers (2); S6, placing the naturally air-dried fabric base layer (1) between the upper and lower waterproof layers (2), and fixing them together using a pressing device; S7, putting the silane coupling agent, talcum powder and water into another mixing container and mixing them evenly, and spraying the mixed solution on the waterproof layer (2) using a spraying device, and forming a second protective film layer (4) after natural air drying.

3. The method for preparing a porous composite nonwoven fabric with strong water barrier properties according to claim 2, characterized in that: The pressure of the water spunlace in S2 is 10-15 MPa, the pressure of the water spunlace with the high-pressure nozzle in S2 is 60-90 MPa, the temperature of the drying in S2 is 70-90° C., and the drying time is 20-30 min.

4. The method for preparing a porous composite nonwoven fabric with strong water barrier properties according to claim 2, characterized in that: The ratio of the silane coupling agent to water in the first protective film layer (3) and the second protective film layer (4) is 1:

1.

5. The method for preparing a porous composite nonwoven fabric with strong water barrier properties according to claim 2, characterized in that: The drying treatment temperature in S3 and S5 is 80-90° C., and the drying time is 20-30 minutes.

6. The method for preparing a porous composite nonwoven fabric with strong water barrier properties according to claim 2, characterized in that: The antibacterial agent is a nano silver antibacterial agent.

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