A method for preparing breathable composite fabric

Abstract

The present invention relates to the innovative field of textile technology, in particular to a method for preparing a composite fabric that combines high air permeability with excellent moisture management function. The present invention provides a method for preparing a breathable composite fabric, wherein the fabric prepared by the method includes a non-continuous hydrophobic layer and a moisture-absorbing quick-drying layer from the inside to the outside, so as to achieve high air permeability and excellent moisture management ability.

Description

Technical Field

[0001] The present invention relates to the innovative field of textile technology, and in particular to a method for preparing a composite fabric that combines high air permeability with excellent moisture management function. Background Art

[0002] Moisture-absorbing and quick-drying fabrics, a unique functional fabric, significantly improves the discomfort caused by excessive sweating during sports or outdoor activities with its excellent moisture absorption and rapid conduction properties. Its design concept is to quickly absorb moisture and sweat from the surface of the skin, and then efficiently conduct it to the outer layer of the fabric to speed up the evaporation process, so that the wearer always stays dry and comfortable. The advent of this fabric has undoubtedly greatly improved people's wearing experience in occasions where sweating is easy.

[0003] Even more outstanding is the discontinuous hydrophobic, moisture-absorbing and quick-drying fabric, an innovative functional textile fabric that cleverly combines the two functions of hydrophobicity and moisture-absorbing and quick-drying, which can achieve hydrophobicity in specific areas and exhibit excellent moisture-absorbing and quick-drying performance in other areas. This innovation is due to the exquisite mixed spinning technology of moisture-absorbing fibers and moisture-conducting and moisture-releasing fibers, which significantly improves the moisture absorption and quick-drying properties of the fabric.

[0004] However, the existing process for preparing moisture-absorbing and quick-drying fabrics has the problem of lengthy process flow. In order to solve this problem, the known process uses waxed cotton yarn and modal yarn to interweave into fabrics, then sprays a hydrophobic agent, and removes the wax by scouring with alkali solution, thereby forming a non-continuous hydrophobic structure fabric with cotton fiber hygroscopicity and modal fiber hydrophobicity. Unfortunately, this process still has many disadvantages. First, the contact time between the fabric and the skin is still too long after absorbing moisture; second, the hydrophobic agent is easily decomposed in alkali solution, resulting in the failure of the hydrophobic function; finally, the addition of the hydrophobic agent also reduces the breathability of the fabric. These problems seriously hinder the industrial application of this process.

[0005] Therefore, how to overcome these problems and develop composite fabrics with high breathability has become a technical challenge that the current textile industry needs to solve urgently. We hope that through continuous technological innovation and research and development, we can find solutions to promote the development of this field and bring consumers a more comfortable and practical wearing experience. Summary of the invention

[0006] In view of the above problems, the present invention provides a method for preparing a breathable composite fabric. The fabric prepared by the method includes a non-continuous hydrophobic layer and a moisture-absorbing quick-drying layer from the inside to the outside, so as to achieve high air permeability and excellent moisture management ability.

[0007] Specifically, the present invention provides a method for preparing a breathable composite fabric, which comprises the following steps:

[0008] (1) adding oleophilic molecular sieve to modal spinning stock solution and mixing them evenly, spinning and stretching to obtain blended modal fiber, and spinning into modal yarn;

[0009] (2) interweaving the blended modal yarn and the waxed cotton yarn to form a grey cloth, and then spraying a hydrophobic agent on the grey cloth, drying and alkali boiling to form a discontinuous hydrophobic layer;

[0010] (3) adding a hydrophilic molecular sieve to a polyester spinning stock solution and mixing the mixture evenly, spinning the mixture and stretching the mixture to obtain polyester fibers;

[0011] (5) The discontinuous hydrophobic layer and the moisture-absorbing quick-drying layer are bonded by a hot pressing composite process and then subjected to a steam setting treatment to form a breathable composite fabric.

[0012] Preferably, in step (1), the weight ratio of the modal spinning solution to the oleophilic molecular sieve is 100:1 to 100:10, and the elongation is 100-180%.

[0013] Preferably, the oleophilic molecular sieve in step (1) is one of SAPO-34, MOR, and BEA molecular sieves, with a particle size of 50-200 nm and a silicon-aluminum ratio greater than 10.

[0014] Preferably, in step (2), the weight ratio of the waxed cotton yarn to the modal yarn is 1:1 to 1:2.

[0015] Preferably, the hydrophobic agent in step (2) is selected from one of fluorinated acrylates, fluorinated silanes, and perfluorinated compounds, and its usage amount is 0.5-5% of the total weight of the fabric.

[0016] Preferably, the pH of the alkali solution in step (2) is 10-14, and the alkali boiling time is 60-200 min.

[0017] Preferably, the hydrophilic molecules in step (2) are selected from one of NaA and ZSM-5, with a particle size of 80-500 nm and a silicon-aluminum ratio of less than 2.

[0018] Preferably, in step (2), the weight ratio of the polyester spinning solution to the hydrophilic molecular sieve is 100:5 to 100:20.

[0019] The present invention also provides a breathable composite fabric, which comprises a discontinuous hydrophobic layer and a hygroscopic quick-drying layer from the inside to the outside, wherein the discontinuous hydrophobic layer is woven from cotton fiber and modal yarn containing oleophilic molecular sieve, and the surface of the modal yarn is also coated with a water repellent, and the hygroscopic quick-drying layer is composed of polyester fiber containing hydrophilic molecular sieve.

[0020] Compared with the prior art, the present invention has the following significant advantages:

[0021] Firstly, the composite fabric created by the present invention not only combines the excellent waterproof performance of the discontinuous hydrophobic fabric, but also has the good hydrophilicity of the moisture-absorbing and quick-drying layer. This innovative combination allows the fabric to achieve waterproof function while more efficiently absorbing and conducting sweat, greatly reducing the length of time sweat stays on the skin surface, thereby effectively reducing stuffiness and discomfort.

[0022] Secondly, the present invention ingeniously adds lipophilic molecular sieves to the modal fiber spinning solution, which can adsorb and fix the water repellent, reducing the possibility of the water repellent being decomposed. In addition, the porous structure of the molecular sieve greatly promotes the circulation of gas, thereby significantly improving the air permeability of the fabric.

[0023] Furthermore, by adding two different types of molecular sieves, the present invention cleverly constructs hydrophilicity differences between different layers. This innovative design not only optimizes the rapid conduction of sweat, but also further enhances the practicality of the fabric.

[0024] In summary, the highly breathable composite fabric prepared by the present invention shows excellent application potential in multiple fields such as sportswear and outdoor equipment, providing a new choice for consumers pursuing high-performance fabrics. DETAILED DESCRIPTION

[0025] (1) Adding lipophilic molecular sieve SAPO-34 to modal spinning stock solution, wherein the weight ratio of modal spinning stock solution to SAPO-34 molecular sieve is 100:5. The particle size of SAPO-34 molecular sieve is 89nm, and the silicon-aluminum ratio is 12. After the mixture is stirred evenly, spinning and stretching are performed, and the stretching rate is set to 140% to obtain blended modal fiber. Then, the blended modal fiber is spun into modal yarn.

[0026] (2) Modal yarn and waxed cotton yarn are interwoven in a weight ratio of 1:1.5 to form a grey fabric. Next, 2-(perfluorohexyl)ethyl methacrylate is sprayed on the grey fabric in an amount of 2% of the total weight of the fabric. After spraying, the fabric is dried and then scoured in an alkali solution with a pH of 12 for 120 minutes to form a discontinuous hydrophobic layer.

[0027] (3) Adding hydrophilic molecular sieve NaA to polyester spinning stock solution, wherein the weight ratio of polyester spinning stock solution to NaA molecular sieve is 100:10. The particle size of NaA molecular sieve is 190nm, and the silicon-aluminum ratio is 1.8. After the mixture is stirred evenly, spinning and stretching are performed to obtain polyester fiber containing hydrophilic molecular sieve.

[0028] (4) The polyester fibers are woven into a moisture-absorbing quick-drying layer.

[0029] (5) Finally, the discontinuous hydrophobic layer and the moisture-absorbing quick-drying layer are bonded by a hot pressing composite process and subjected to a steam setting treatment to obtain a breathable composite fabric.

[0030] Example 2

[0031] (1) Adding lipophilic molecular sieve BEA to modal spinning stock solution, wherein the weight ratio of modal spinning stock solution to BEA molecular sieve is 100:5. The particle size of SAPO-34 molecular sieve is 87nm, and the silicon-aluminum ratio is 15. After the mixture is stirred evenly, spinning and stretching are performed, and the stretching rate is set to 140% to obtain blended modal fiber. Then it is spun into modal yarn.

[0032] (2) Modal yarn and waxed cotton yarn are interwoven in a weight ratio of 1:1.5 to form a grey fabric. Next, 2-(perfluorohexyl)ethyl methacrylate is sprayed on the grey fabric in an amount of 2% of the total weight of the fabric. After spraying, the fabric is dried and then scoured in an alkali solution with a pH of 12 for 120 minutes to form a discontinuous hydrophobic layer.

[0033] (3) Adding hydrophilic molecular sieve NaA to polyester spinning stock solution, wherein the weight ratio of polyester spinning stock solution to NaA molecular sieve is 100:10. The particle size of NaA molecular sieve is 190nm, and the silicon-aluminum ratio is 1.8. After the mixture is stirred evenly, spinning and stretching are performed to obtain polyester fiber containing hydrophilic molecular sieve.

[0034] (4) The polyester fibers are woven into a moisture-absorbing quick-drying layer.

[0035] (5) Finally, the discontinuous hydrophobic layer and the moisture-absorbing quick-drying layer are bonded by a hot pressing composite process and subjected to a steam setting treatment to obtain a breathable composite fabric.

[0036] Example 3

[0037] (1) Adding lipophilic molecular sieve BEA to modal spinning stock solution, wherein the weight ratio of modal spinning stock solution to BEA molecular sieve is 100:5. The particle size of SAPO-34 molecular sieve is 87nm, and the silicon-aluminum ratio is 15. After the mixture is stirred evenly, spinning and stretching are performed, and the stretching rate is set to 140% to obtain blended modal fiber. Then it is spun into modal yarn.

[0038] (2) Modal yarn and waxed cotton yarn are interwoven in a weight ratio of 1:1.5 to form a grey fabric. Next, 2-(perfluorohexyl)ethyl methacrylate is sprayed on the grey fabric in an amount of 2% of the total weight of the fabric. After spraying, the fabric is dried and then scoured in an alkali solution with a pH of 12 for 120 minutes to form a discontinuous hydrophobic layer.

[0039] (3) Adding hydrophilic molecular sieve ZSM-5 to polyester spinning stock solution, wherein the weight ratio of polyester spinning stock solution to ZSM-5 molecular sieve is 100:10. The particle size of ZSM molecular sieve is 135nm, and the silicon-aluminum ratio is 1.5. After the mixture is stirred evenly, spinning and stretching are performed to obtain polyester fiber containing hydrophilic molecular sieve.

[0040] (4) The polyester fibers are woven into a moisture-absorbing quick-drying layer.

[0041] (5) Finally, the discontinuous hydrophobic layer and the moisture-absorbing quick-drying layer are bonded by a hot pressing composite process and subjected to a steam setting treatment to obtain a breathable composite fabric.

[0042] Comparative Example 1

[0043] The difference between this embodiment and embodiment 1 is that the modal spinning solution does not contain molecular sieve.

[0044] Comparative Example 2

[0045] The difference between this embodiment and embodiment 1 is that the polyester spinning solution does not contain molecular sieves.

[0046] The composite fabrics prepared in the above examples and comparative examples were tested for drip diffusion time and wicking height according to GB / T21655.1-2008 standard, and the fabric air permeability was tested according to GB / T5453-1997 "Determination of Air Permeability of Textile Fabrics". The results are shown in the following table.

[0047] Table 1

[0048]

[0049] The above embodiments do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A method for preparing a breathable composite fabric, characterized in that The steps include: (1) adding a lipophilic molecular sieve to a modal spinning stock solution and mixing the mixture evenly, spinning and stretching the mixture to obtain a blended modal fiber, which is then spun into a modal yarn; in step (1), the weight ratio of the modal spinning stock solution to the lipophilic molecular sieve is 100:1 to 100:10, and the stretching rate is 100-180%; the lipophilic molecular sieve in step (1) is one of SAPO-34, MOR, and BEA molecular sieves, with a particle size of 50-200 nm and a silicon-aluminum ratio greater than 10; (2) interweaving the modal yarn and the waxed cotton yarn to form a grey cloth, and then spraying a hydrophobic agent on the grey cloth, drying and alkali boiling to form a discontinuous hydrophobic layer; (3) adding a hydrophilic molecular sieve to a polyester spinning stock solution and mixing the mixture evenly, spinning and stretching the mixture to obtain a polyester fiber; wherein the hydrophilic molecular sieve in step (3) is selected from one of NaA and ZSM-5, has a particle size of 80-500 nm, and a silicon-aluminum ratio of less than 2; and wherein the weight ratio of the polyester spinning stock solution to the hydrophilic molecular sieve in step (3) is 100:5 to 100:20; (4) weaving the polyester fiber to form a moisture-absorbing quick-drying layer; (5) The discontinuous hydrophobic layer and the moisture-absorbing quick-drying layer are bonded by a hot pressing composite process and then subjected to a steam setting treatment to form a breathable composite fabric.

2. The preparation method according to claim 1, characterized in that In step (2), the weight ratio of the waxed cotton yarn to the modal yarn is 1:1 to 1:

2.

3. The preparation method according to claim 1, characterized in that In step (2), the hydrophobic agent is selected from one of fluorinated acrylates, fluorinated silanes, and perfluorinated compounds, and its usage amount is 0.5-5% of the total weight of the fabric.

4. The preparation method according to claim 1, characterized in that The pH of the alkali solution used for alkali boiling in step (2) is 10-14, and the alkali boiling time is 60-200 minutes.

5. A breathable composite fabric prepared according to any one of the preparation methods of claims 1 to 4, characterized in that The composite fabric includes a discontinuous hydrophobic layer and a moisture-absorbing quick-drying layer from the inside to the outside, wherein the discontinuous hydrophobic layer is woven from cotton fiber and modal yarn containing oleophilic molecular sieve, and the surface of the modal yarn is also coated with a hydrophobic agent, and the moisture-absorbing quick-drying layer is composed of polyester fiber containing hydrophilic molecular sieve.

Images