High-strength polyester cotton fabric and preparation method thereof

Abstract

The application relates to the technical field of polyester-cotton fabrics, and discloses a high-strength polyester-cotton fabric and a preparation method thereof.A high-strength polyester-cotton fabric is prepared by mixing polyester and cotton fibers; the polyester contains fillers in the composition, the fillers include at least one of inorganic powder, silanized inorganic powder and hindered phenol inorganic powder; the inorganic powder has a core-shell structure, the shell layer is silicon dioxide, and the core layer is titanium dioxide.The above technical scheme solves the problem of insufficient strength of the polyester-cotton fabric in the related art.

Description

Technical Field

[0001] This invention relates to the field of polyester-cotton fabric technology, specifically to a high-strength polyester-cotton fabric and its preparation method. Background Technology

[0002] Polyester-cotton blended fabrics combine the wrinkle-resistant, crisp, easy-to-wash, and quick-drying properties of polyester with the moisture-wicking, breathable, and skin-friendly comfort of cotton fibers. They are widely used in apparel, home textiles, and industrial textiles, and are currently one of the mainstream blended fabrics on the market. However, due to factors such as the relatively low breaking strength of cotton fibers and the significant differences in the mechanical properties of the two types of fibers, conventional polyester-cotton fabrics generally suffer from insufficient fiber breaking strength.

[0003] During spinning and weaving, uneven fiber cohesion and stress distribution can easily lead to monofilament breakage and reduced yarn strength, resulting in decreased overall fabric durability. Under stretching, friction, and repeated bending, such fabrics are prone to yarn breakage, pilling, and localized damage, shortening product lifespan and affecting appearance and stability. In applications requiring high mechanical properties, such as workwear and outdoor gear, this weakness in strength is even more pronounced, leading to tearing and cracking, thus limiting their application. Current processes often improve strength by increasing twist and weight, but this often results in stiff fabric feel and reduced breathability, making it difficult to balance comfort and mechanical performance. Therefore, it is crucial to improve fiber breaking strength while preserving the excellent properties of polyester-cotton blends, addressing the shortcomings of existing fabric durability. Summary of the Invention

[0004] This invention proposes a high-strength polyester-cotton fabric and its preparation method, which solves the problem of insufficient strength of polyester-cotton fabric in related technologies.

[0005] The technical solution of the present invention is as follows: This invention proposes a high-strength polyester-cotton fabric, which is made of a blend of polyester and cotton fibers; The polyester component contains fillers, which include at least one of inorganic powder, silanized inorganic powder, and hindered phenolic inorganic powder. The inorganic powder has a core-shell structure, with silicon dioxide as the shell and titanium dioxide as the core.

[0006] As a further technical solution, the mass of the filler is 8% to 15% of the mass of the polyester.

[0007] As a further technical solution, the method for preparing the polyester includes the following steps: After the polyester chips and fillers are mixed evenly, they are extruded and granulated, and then melt-spun to obtain polyester.

[0008] As a further technical solution, the mass ratio of cotton fiber to polyester is 7:3.

[0009] As a further technical solution, the filler is hindered phenolation of inorganic powder.

[0010] In this invention, hindered phenolation of inorganic powder is introduced. Its modified groups can significantly improve the compatibility and bonding strength of the interface between inorganic particles and polymers, reduce interface defects, and make the fibers less prone to slippage and breakage under stress, thereby further improving the strength of polyester fibers.

[0011] As a further technical solution, the method for preparing the hindered phenolation inorganic powder includes the following steps: A1. Disperse the inorganic powder in an ethanol aqueous solution, adjust the pH to 4-5, add silane coupling agent KH590 and mix, filter and dry to obtain silanized inorganic powder. A2. The silanized inorganic powder is dispersed in toluene, mixed with antioxidant GM solution, reacted with triethylamine, filtered, and dried to obtain hindered phenolized inorganic powder.

[0012] As a further technical solution, the mass ratio of the inorganic powder to the silane coupling agent KH590 is 10:1~2; The antioxidant GM solution includes antioxidant GM and toluene, and the mass-to-volume ratio of antioxidant GM and toluene is 1g:6~7mL; The mass ratio of the inorganic powder to the antioxidant GM is 10:2.5~4; The mass ratio of the antioxidant GM to triethylamine is 10:1 to 1.2.

[0013] As a further technical solution, the mass ratio of ethanol to water in the ethanol-water solution is 3:1; The mass-to-volume ratio of the inorganic powder to the ethanol aqueous solution is 1:10.

[0014] As a further technical solution, in step A1, the mixing temperature is 75~80℃ and the time is 10~12h; In step A2, the reaction is carried out under nitrogen protection at a temperature of 40-45°C for 4-5 hours.

[0015] This invention also proposes a method for preparing high-strength polyester-cotton fabric, comprising the following steps: S1. Polyester and cotton fibers are blended to obtain a blended fabric; S2. Desizing and singeing the blended fabric to obtain a pretreated blended fabric; S3. Apply adhesive to one side of the pretreated blended fabric, cure it to form an adhesive layer, and obtain a high-strength polyester-cotton fabric.

[0016] As a further technical solution, the coating amount of the adhesive is 12~18g / m². 2 .

[0017] The working principle and beneficial effects of this invention are as follows: In this invention, the overall tensile strength of polyester-cotton fabric is significantly improved by adding core-shell structured silica-titanium dioxide composite powder to polyester fibers. The composite powder, with silica as the core and titanium dioxide as the shell, can be uniformly dispersed in the polyester fiber matrix, reducing agglomeration defects, effectively bearing and transferring external stress, and reducing stress concentration damage to the fiber structure. The core-shell structure combines the high rigidity of silica with the interfacial bonding of titanium dioxide, enhancing the physical entanglement and interfacial forces between the powder and the polyester macromolecular chains, improving the density and integrity of the fiber's internal structure. Under tensile stress, the fibers are less prone to crack propagation and brittle fracture, resulting in significantly improved yarn strength and overall fabric durability. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] In the following examples and comparative examples, the average diameter of polyester was 15 μm and the average diameter of cotton fiber was 20 μm; The preparation method of inorganic powder includes the following steps: 50g of titanium dioxide (particle size 500nm) is added to 500mL of water and dispersed to obtain a dispersion. The pH value is adjusted to 9, 18.3mL of sodium silicate and 91.0mL of sulfuric acid (concentration of 0.2mol / L) are added, and the mixture is stirred at 100℃ for 10h. After washing and drying, an inorganic powder with a shell of silicon dioxide and a core of titanium dioxide is obtained.

[0020] Example 1 High-strength polyester-cotton fabric, made of a blend of polyester and cotton fibers (the mass ratio of cotton fiber to polyester is 7:3); The method for preparing polyester includes the following steps: Polyester chips and inorganic powder are mixed evenly, extruded and granulated, and then melt-spun to obtain polyester. The inorganic powder has a core-shell structure, with silicon dioxide as the shell and titanium dioxide as the core. The mass of the inorganic powder is 8% of the mass of the polyester. The preparation method of high-strength polyester-cotton fabric includes the following steps: S1. Polyester and cotton fibers are blended to obtain a blended fabric; S2. Desizing and singeing the blended fabric to obtain a pretreated blended fabric; S3. Apply adhesive to one side of the pretreated blended fabric (coating amount: 18g / m²). 2 (The adhesive is then cured to form a glue layer, resulting in a high-strength polyester-cotton fabric.)

[0021] Example 2 High-strength polyester-cotton fabric, made of a blend of polyester and cotton fibers (the mass ratio of cotton fiber to polyester is 7:3); The method for preparing polyester includes the following steps: Polyester chips and inorganic powder are mixed evenly, then extruded and granulated, followed by melt spinning to obtain polyester. The inorganic powder has a core-shell structure, with a shell of silicon dioxide and a core of titanium dioxide. The mass of the inorganic powder is 15% of the mass of the polyester. The preparation method of high-strength polyester-cotton fabric includes the following steps: S1. Polyester and cotton fibers are blended to obtain a blended fabric; S2. Desizing and singeing the blended fabric to obtain a pretreated blended fabric; S3. Apply adhesive to one side of the pretreated blended fabric (coating amount: 12g / m²). 2 (The adhesive is then cured to form a glue layer, resulting in a high-strength polyester-cotton fabric.)

[0022] Example 3 High-strength polyester-cotton fabric, made of a blend of polyester and cotton fibers (the mass ratio of cotton fiber to polyester is 7:3); The method for preparing polyester includes the following steps: Polyester chips and inorganic powder are mixed evenly, extruded and granulated, and then melt-spun to obtain polyester. The inorganic powder has a core-shell structure, with silicon dioxide as the shell and titanium dioxide as the core. The mass of the inorganic powder is 14% of the mass of the polyester. The preparation method of high-strength polyester-cotton fabric includes the following steps: S1. Polyester and cotton fibers are blended to obtain a blended fabric; S2. Desizing and singeing the blended fabric to obtain a pretreated blended fabric; S3. Apply adhesive to one side of the pretreated blended fabric (coating amount: 15g / m²). 2 (The adhesive is then cured to form a glue layer, resulting in a high-strength polyester-cotton fabric.)

[0023] Example 4 High-strength polyester-cotton fabric, made of a blend of polyester and cotton fibers (the mass ratio of cotton fiber to polyester is 7:3); The method for preparing polyester includes the following steps: Polyester chips and silanized inorganic powder were mixed evenly, then extruded and granulated, followed by melt spinning to obtain polyester. The inorganic powder had a core-shell structure, with a shell of silicon dioxide and a core of titanium dioxide. The mass of the silanized inorganic powder was 14% of the mass of the polyester. A method for preparing silanized inorganic powders includes the following steps: Inorganic powder was dispersed in an ethanol-water solution (ethanol to water mass ratio of 3:1), the pH was adjusted to 4, silane coupling agent KH590 was added, and the mixture was stirred at 75℃ for 12 h. After filtration and drying, silanized inorganic powder was obtained. The mass-to-volume ratio of inorganic powder to ethanol-water solution was 1:10, and the mass ratio of inorganic powder to silane coupling agent KH590 was 10:1. The preparation method of high-strength polyester-cotton fabric includes the following steps: S1. Polyester and cotton fibers are blended to obtain a blended fabric; S2. Desizing and singeing the blended fabric to obtain a pretreated blended fabric; S3. Apply adhesive to one side of the pretreated blended fabric (coating amount: 15g / m²). 2 (The adhesive is then cured to form a glue layer, resulting in a high-strength polyester-cotton fabric.)

[0024] Example 5 High-strength polyester-cotton fabric, made of a blend of polyester and cotton fibers (the mass ratio of cotton fiber to polyester is 7:3); The method for preparing polyester includes the following steps: Polyester chips and hindered phenolized inorganic powder were mixed evenly, extruded and granulated, and then melt-spun to obtain polyester. The inorganic powder had a core-shell structure, with silicon dioxide as the shell and titanium dioxide as the core. The mass of the hindered phenolized inorganic powder was 14% of the mass of the polyester. A method for preparing hindered phenolation of inorganic powders includes the following steps: Inorganic powder was dispersed in an ethanol-water solution (ethanol to water mass ratio of 3:1), the pH was adjusted to 4, silane coupling agent KH590 was added, and the mixture was stirred at 75℃ for 12 h. After filtration and drying, silanized inorganic powder was obtained. The mass-to-volume ratio of inorganic powder to ethanol-water solution was 1:10, and the mass ratio of inorganic powder to silane coupling agent KH590 was 10:1. The silanized inorganic powder was dispersed in toluene, and an antioxidant GM solution (the mass-to-volume ratio of antioxidant GM to toluene was 1 g:6 mL) was added and mixed. Triethylamine was then added, and the mixture was reacted at 40 °C for 5 h under nitrogen protection. The mixture was then filtered and dried to obtain hindered phenolized inorganic powder. The mass ratio of inorganic powder to antioxidant GM was 10:2.5, and the mass ratio of antioxidant GM to triethylamine was 10:1. The preparation method of high-strength polyester-cotton fabric includes the following steps: S1. Polyester and cotton fibers are blended to obtain a blended fabric; S2. Desizing and singeing the blended fabric to obtain a pretreated blended fabric; S3. Apply adhesive to one side of the pretreated blended fabric (coating amount: 15g / m²). 2 (The adhesive is then cured to form a glue layer, resulting in a high-strength polyester-cotton fabric.)

[0025] Example 6 High-strength polyester-cotton fabric, made of a blend of polyester and cotton fibers (the mass ratio of cotton fiber to polyester is 7:3); The method for preparing polyester includes the following steps: Polyester chips and hindered phenolized inorganic powder were mixed evenly, extruded and granulated, and then melt-spun to obtain polyester. The inorganic powder had a core-shell structure, with silicon dioxide as the shell and titanium dioxide as the core. The mass of the hindered phenolized inorganic powder was 14% of the mass of the polyester. A method for preparing hindered phenolation of inorganic powders includes the following steps: Inorganic powder was dispersed in an ethanol-water solution (ethanol to water mass ratio of 3:1), the pH was adjusted to 5, silane coupling agent KH590 was added, and the mixture was stirred at 80℃ for 10 h. After filtration and drying, silanized inorganic powder was obtained. The mass-to-volume ratio of inorganic powder to ethanol-water solution was 1:10, and the mass ratio of inorganic powder to silane coupling agent KH590 was 10:2. The silanized inorganic powder was dispersed in toluene, and an antioxidant GM solution (the mass-to-volume ratio of antioxidant GM to toluene was 1 g:7 mL) was added and mixed. Triethylamine was then added and the mixture was reacted at 45 °C for 4 h under nitrogen protection. The mixture was then filtered and dried to obtain hindered phenolized inorganic powder. The mass ratio of inorganic powder to antioxidant GM was 10:4, and the mass ratio of antioxidant GM to triethylamine was 10:1.2. The preparation method of high-strength polyester-cotton fabric includes the following steps: S1. Polyester and cotton fibers are blended to obtain a blended fabric; S2. Desizing and singeing the blended fabric to obtain a pretreated blended fabric; S3. Apply adhesive to one side of the pretreated blended fabric (coating amount: 15g / m²). 2 (The adhesive is then cured to form a glue layer, resulting in a high-strength polyester-cotton fabric.)

[0026] Comparative Example 1 The only difference between this comparative example and Example 3 is that the inorganic powder is titanium dioxide.

[0027] Comparative Example 2 The only difference between this comparative example and Example 3 is that the inorganic powder is silicon dioxide.

[0028] Experimental Example The polyester-cotton fabrics prepared in the examples and comparative examples were subjected to strength tests (the breaking strength of polyester fibers was tested using an electron microscopic tensile strength tester, the tensile speed was 10 mm / min, the holding distance was 10 cm, and the pre-tension was 0.2 cN). The results are shown in Table 1 below.

[0029] Table 1 Test Results

[0030] Compared with Comparative Examples 1-2, the polyester-cotton fabric fibers prepared in Examples 1-6 have higher strength, indicating that adding core-shell structured silica and titanium dioxide composite powder to polyester fibers improves the strength of polyester-cotton fabric. In particular, the addition of hindered phenolic inorganic powder has the best effect on improving the strength of polyester-cotton fabric.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-strength polyester-cotton fabric, characterized in that, The polyester-cotton fabric is made of a blend of polyester and cotton fibers. The polyester component contains fillers, which include at least one of inorganic powder, silanized inorganic powder, and hindered phenolic inorganic powder. The inorganic powder has a core-shell structure, with silicon dioxide as the shell and titanium dioxide as the core.

2. The high-strength polyester-cotton fabric according to claim 1, characterized in that, The mass of the filler is 8% to 15% of the mass of the polyester.

3. The high-strength polyester-cotton fabric according to claim 1, characterized in that, The method for preparing the polyester includes the following steps: After the polyester chips and fillers are mixed evenly, they are extruded and granulated, and then melt-spun to obtain polyester.

4. The high-strength polyester-cotton fabric according to claim 2, characterized in that, The mass ratio of cotton fiber to polyester is 7:

3.

5. The high-strength polyester-cotton fabric according to claim 1, characterized in that, The filler is a hindered phenolated inorganic powder.

6. The high-strength polyester-cotton fabric according to claim 5, characterized in that, The method for preparing the hindered phenolation inorganic powder includes the following steps: A1. Disperse the inorganic powder in an ethanol aqueous solution, adjust the pH to 4-5, add silane coupling agent KH590 and mix, filter and dry to obtain silanized inorganic powder. A2. The silanized inorganic powder is dispersed in toluene, mixed with antioxidant GM solution, reacted with triethylamine, filtered, and dried to obtain hindered phenolized inorganic powder.

7. The high-strength polyester-cotton fabric according to claim 6, characterized in that, The mass ratio of the inorganic powder to the silane coupling agent KH590 is 10:1~2; The antioxidant GM solution includes antioxidant GM and toluene, and the mass-to-volume ratio of antioxidant GM and toluene is 1g:6~7mL; The mass ratio of the inorganic powder to the antioxidant GM is 10:2.5~4; The mass ratio of the antioxidant GM to triethylamine is 10:1 to 1.

2.

8. A high-strength polyester-cotton fabric according to claim 6, characterized in that, In step A1, the mixing temperature is 75~80℃ and the time is 10~12h; In step A2, the reaction is carried out under nitrogen protection at a temperature of 40-45°C for 4-5 hours.

9. A method for preparing a high-strength polyester-cotton fabric, used to prepare the high-strength polyester-cotton fabric according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1. Polyester and cotton fibers are blended to obtain a blended fabric; S2. Desizing and singeing the blended fabric to obtain a pretreated blended fabric; S3. Apply adhesive to one side of the pretreated blended fabric, cure it to form an adhesive layer, and obtain a high-strength polyester-cotton fabric.

10. The method for preparing a high-strength polyester-cotton fabric according to claim 9, characterized in that, The coating amount of the adhesive is 12~18g / m². 2 .

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