Glass fiber stab-resistant fabric and preparation method thereof

Abstract

The invention relates to a glass fiber stab-resistant fabric and a preparation method thereof. The glass fiber stab-resistant fabric provided by the invention can be prepared by the following steps: firstly, preparing a glass fiber fabric and a shear thickening liquid; secondly, soaking a glass fiber fabric in a shear thickening liquid for finishing to obtain a finished glass fiber fabric; and finally, accumulating the glass fiber fabrics according to a proper number of layers, and sealing with waterproof cloth to obtain the glass fiber stab-resistant fabric. The layer number of the prepared stab-resistant fabric is 18-20, and compared with the layer number of stab-resistant fabric on the market, the layer number of the stab-resistant fabric is obviously reduced; with reference to a test method of GA 68-2019'police stab-resistant clothes', the stab-resistant performance of the prepared glass fiber stab-resistant fabric is qualified.

Description

Technical Field

[0001] This invention belongs to the field of stab-resistant fabric technology, and relates to a glass fiber stab-resistant fabric and its preparation method. Background Technology

[0003] The development of high-strength fibers such as aramid and ultra-high molecular weight polyethylene fibers has greatly improved the manufacture of bulletproof vests. However, most fabrics made from these high-strength fibers do not offer ideal stab protection; or multiple layers of fabric are required to achieve stab protection, but these multiple layers do not achieve the goals of being lightweight, thin, soft, and economical.

[0004] Glass fiber is a high-performance inorganic non-metallic material with advantages such as good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. Glass fiber shows great potential for use in stab-resistant materials; however, reports on its application in stab-resistant materials are limited and require further development.

[0005] Nano-TiO2 is an excellent inorganic filler with wide applications in many fields, but its use in stab-resistant fabrics is rarely reported. Glass fiber can be used in stab-resistant materials, but its stab-resistant properties need further improvement. Summary of the Invention

[0006] In order to overcome the shortcomings of existing technologies, where glass fiber can be used in stab-resistant materials but its stab-resistant performance needs to be further improved, this invention provides a glass fiber stab-resistant fabric and its preparation method.

[0007] The first objective of this invention is to provide a glass fiber stab-resistant fabric, which is achieved by the following steps: First, a glass fiber fabric and a shear thickening liquid are prepared; second, the glass fiber fabric is immersed in the shear thickening liquid for finishing, to obtain a finished glass fiber fabric; finally, the glass fiber fabric is stacked in appropriate layers and sealed with a waterproof cloth to obtain a glass fiber stab-resistant fabric.

[0008] The second objective of this invention is to provide a method for preparing a glass fiber stab-resistant fabric, the method comprising the following steps: (1) Fabric preparation: Glass fiber is made into woven fabric using a rapier loom. The fabric has a plain weave structure.

[0009] Preferably, the fabric has a thickness of 0.54 mm and an areal density of 246.8 g / m³. 2 The warp density is 110 threads / 10cm, and the weft density is 85 threads / 10cm.

[0010] (2) Preparation of shear thickening liquid: The nano-TiO2 particles were dispersed in anhydrous ethanol by ultrasonic oscillation using an ultrasonic cleaner for 30-40 min. Then, polyethylene glycol (n=23) was added and ultrasonically dispersed for 2-3 h. Graphene was then added and ultrasonic treatment was continued for 8-12 h until the dispersion was uniform. Finally, the liquid was placed in a vacuum drying oven and dried for 18-24 h at a drying temperature of 60-70 °C to remove air bubbles and excess anhydrous ethanol from the shear thickening liquid, thus obtaining a stable shear thickening liquid.

[0011] Preferably, the ratio of the amount of nano-TiO2 particles, anhydrous ethanol, polyethylene glycol (n=23) and graphene is 1g:(100-200)mL:(1-3)g:(1-3)g.

[0012] (3) Impregnation finishing: The shear thickening liquid is diluted with anhydrous ethanol to prepare a suspension. Then, the suspension is dispersed by ultrasonic dispersion for 30-60 minutes. The glass fiber fabric is impregnated in the suspension for 10-20 minutes. After impregnation, the glass fiber fabric is dried at 60-70℃ for 8-10 hours. The excess anhydrous ethanol is evaporated to obtain the finished glass fiber fabric.

[0013] Preferably, the ratio of the shear thickening liquid, anhydrous ethanol, and glass fiber fabric is 1 mL: (5-7) mL: (1-3) g.

[0014] (4) Molding: The glass fiber fabric is stacked in appropriate number of layers and then sealed with a waterproof cloth to form a glass fiber puncture-proof fabric.

[0015] Preferably, the number of layers in the glass fiber fabric is 18 to 20.

[0016] Mechanism analysis of this invention: Shear thickening fluid is a nanoparticle solvent in a solid-liquid mixed state, which is a slightly viscous liquid under normal conditions. When subjected to impact, its viscosity increases sharply, exhibiting the impact resistance of a solid. After the impact force disappears, it quickly returns to its original flexible state. This invention selects nano-TiO2, polyethylene glycol, and graphene as the main raw materials for the shear thickening fluid. Both nano-TiO2 and graphene have high hardness, which can effectively improve the puncture resistance of fabrics.

[0017] The present invention has the following significant advantages: (1) Glass fiber can be used as a stab-proof material, but its stab-proof performance needs to be further improved. In this invention, nano TiO2 powder and graphene are selected as stab-proof fillers, which can effectively improve the stab-proof performance of the fabric and significantly improve the stab-proof performance of the glass fiber.

[0018] (2) The number of layers of the stab-proof fabric prepared by the present invention is 18 to 20, which is significantly reduced compared to the number of layers of stab-proof fabrics on the market.

[0019] (3) Referring to the test method of GA 68—2019 "Police Stab-Proof Clothing", the stab-proof performance of the glass fiber stab-proof fabric prepared by the present invention is qualified; in addition, the addition of nano TiO2 powder and graphene plays an important role in the stab-proof performance of the fabric. Detailed Implementation

[0020] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0021] Example 1 A glass fiber stab-resistant fabric, which is prepared by the following method: (1) Fabric preparation: Glass fiber is made into woven fabric using a rapier loom. The fabric has a plain weave structure.

[0022] The fabric has a thickness of 0.54 mm and a surface density of 246.8 g / m³. 2 The warp density is 110 threads / 10cm, and the weft density is 85 threads / 10cm.

[0023] (2) Preparation of shear thickening liquid: 10g of nano-TiO2 particles were dispersed in 1500mL of anhydrous ethanol by ultrasonic oscillation using an ultrasonic cleaner for 35min. Then, 20g of polyethylene glycol (n=23) was added and ultrasonically dispersed for 2.5h. Then, 20g of graphene was added and ultrasonic treatment was continued for 10h until the dispersion was uniform. Finally, it was placed in a vacuum drying oven and dried for 20h at a drying temperature of 65℃ to remove air bubbles and excess anhydrous ethanol from the shear thickening liquid, thus obtaining a stable shear thickening liquid.

[0024] (3) Impregnation finishing: 100 mL of shear thickening liquid was diluted with 600 mL of anhydrous ethanol to prepare a suspension. Then, the suspension was dispersed by ultrasonic dispersion for 45 min. 200 g of glass fiber fabric was impregnated in the suspension for 15 min. After impregnation, the glass fiber fabric was dried at 65 °C for 9 h to evaporate the excess anhydrous ethanol and obtain the finished glass fiber fabric.

[0025] (4) Molding: The glass fiber fabric is stacked in 19 layers and then sealed with a waterproof cloth to form glass fiber puncture-proof fabric a.

[0026] Example 2 A glass fiber stab-resistant fabric, which is prepared by the following method: (1) Fabric preparation: Glass fiber is made into woven fabric using a rapier loom. The fabric has a plain weave structure.

[0027] The fabric has a thickness of 0.54 mm and a surface density of 246.8 g / m³. 2 The warp density is 110 threads / 10cm, and the weft density is 85 threads / 10cm.

[0028] (2) Preparation of shear thickening liquid: 10g of nano TiO2 particles were dispersed in 1000mL of anhydrous ethanol by ultrasonic oscillation using an ultrasonic cleaner for 30min. Then, 10g of polyethylene glycol (n=23) was added and ultrasonically dispersed for 2h. Then, 10g of graphene was added and ultrasonic treatment was continued for 8h until the dispersion was uniform. Finally, it was placed in a vacuum drying oven and dried for 18h at a drying temperature of 60℃ to remove air bubbles and excess anhydrous ethanol from the shear thickening liquid, thus obtaining a stable shear thickening liquid.

[0029] (3) Impregnation finishing: Dilute 100mL of shear thickening liquid with 500mL of anhydrous ethanol to prepare a suspension. Then disperse the suspension by ultrasonic dispersion for 30min. Impregnate 100g of glass fiber fabric in the suspension for 10min. After impregnation, dry the glass fiber fabric at 60℃ for 8h and evaporate the excess anhydrous ethanol to obtain the finished glass fiber fabric.

[0030] (4) Molding: The glass fiber fabric is stacked in 18 layers and then sealed with a waterproof cloth to form glass fiber puncture-proof fabric b.

[0031] Example 3 A glass fiber stab-resistant fabric, which is prepared by the following method: (1) Fabric preparation: Glass fiber is made into woven fabric using a rapier loom. The fabric has a plain weave structure.

[0032] The fabric has a thickness of 0.54 mm and a surface density of 246.8 g / m³. 2 The warp density is 110 threads / 10cm, and the weft density is 85 threads / 10cm.

[0033] (2) Preparation of shear thickening liquid: 10g of nano-TiO2 particles were dispersed in 2000mL of anhydrous ethanol by ultrasonic oscillation using an ultrasonic cleaner for 40min. Then, 30g of polyethylene glycol (n=23) was added and ultrasonically dispersed for 3h. Then, 30g of graphene was added and ultrasonic treatment was continued for 12h until the dispersion was uniform. Finally, it was placed in a vacuum drying oven and dried for 24h at 70℃ to remove air bubbles and excess anhydrous ethanol from the shear thickening liquid, thus obtaining a stable shear thickening liquid.

[0034] (3) Impregnation finishing: 100 mL of shear thickening liquid was diluted with 700 mL of anhydrous ethanol to prepare a suspension. Then, the suspension was dispersed by ultrasonic dispersion for 60 min. 300 g of glass fiber fabric was impregnated in the suspension for 20 min. After impregnation, the glass fiber fabric was dried at 70 °C for 10 h to evaporate the excess anhydrous ethanol and obtain the finished glass fiber fabric.

[0035] (4) Molding: The glass fiber fabric is stacked in 20 layers and then sealed with a waterproof cloth to form glass fiber puncture-proof fabric c.

[0036] Comparative Example A Commercially available stab-resistant fabric d (purchased from Ruihua Laboratory Equipment Business Department, Hongshan District, Wuhan City).

[0037] Comparative Example B Compared with Example 1, in this Comparative Example B, the amount of nano TiO2 was reduced, that is, "10g nano TiO2 particles" was adjusted to "0.1g nano TiO2 particles". Other preparation methods were carried out according to the preparation method of Example 1, and glass fiber stab-proof fabric e was obtained.

[0038] Comparative Example C Compared with Example 1, in this Comparative Example C, the amount of graphene was reduced, and "20g graphene" was adjusted to "0.2g graphene". Other preparation methods were carried out according to the preparation method of Example 1, and glass fiber stab-proof fabric f was obtained.

[0039] Performance testing: The fabrics prepared or purchased in Examples 1-3 and Comparative Examples A-C were subjected to stab resistance tests. The test methods referred to the GA 68—2019 standard "Police Stab-Resistant Vest". This standard uses a 2.4 kg knife with a specified energy to puncture the stab-resistant material in free fall, and the protective performance is evaluated based on the degree of fabric penetration. Whether the stab resistance performance is qualified is determined by whether the knife punctures the stab-resistant material. The test results are shown in the table below.

[0040] ; As can be seen from the table, Examples 1-3 and Comparative Examples A-C show that, referring to the test methods of GA 68-2019 "Police Stab-Proof Vest", the stab-proof performance of the glass fiber stab-proof fabric prepared by this invention is qualified; in addition, the addition of nano TiO2 powder and graphene plays an important role in the stab-proof performance of the fabric.

Claims

1. A method for preparing a glass fiber stab-resistant fabric, characterized in that, The preparation method includes the following steps: (1) Fabric preparation: Glass fiber is made into woven fabric using a rapier loom. The fabric has a plain weave structure. (2) Preparation of shear thickening liquid: The nano-TiO2 particles were dispersed in anhydrous ethanol by ultrasonic oscillation using an ultrasonic cleaner for 30-40 min. Then, polyethylene glycol (n=23) was added and ultrasonically dispersed for 2-3 h. Graphene was then added and ultrasonic treatment was continued for 8-12 h until the dispersion was uniform. Finally, the mixture was placed in a vacuum drying oven and dried for 18-24 h at a temperature of 60-70 °C to remove air bubbles and excess anhydrous ethanol from the shear thickening liquid, thus obtaining a stable shear thickening liquid. (3) Impregnation finishing: The shear thickening liquid is diluted with anhydrous ethanol to prepare a suspension. Then, the suspension is dispersed by ultrasonic dispersion for 30-60 minutes. The glass fiber fabric is impregnated in the suspension for 10-20 minutes. After impregnation, the glass fiber fabric is dried at 60-70℃ for 8-10 hours. Excess anhydrous ethanol is evaporated to obtain the finished glass fiber fabric. (4) Molding: The glass fiber fabric is stacked in appropriate number of layers and then sealed with a waterproof cloth to form a glass fiber puncture-proof fabric.

2. The method for preparing a glass fiber stab-resistant fabric according to claim 1, characterized in that, The fabric in step (1) has a thickness of 0.54 mm and an areal density of 246.8 g / m³. 2 The warp density is 110 threads / 10cm, and the weft density is 85 threads / 10cm.

3. The method for preparing a glass fiber stab-resistant fabric according to claim 1, characterized in that, The ratio of nano-TiO2 particles, anhydrous ethanol, polyethylene glycol (n=23) and graphene used in step (2) is 1g:(100~200)mL:(1~3)g:(1~3)g.

4. The method for preparing a glass fiber stab-resistant fabric according to claim 1, characterized in that, The ratio of the shear thickening liquid, anhydrous ethanol and glass fiber fabric used in step (3) is 1 mL: (5-7) mL: (1-3) g.

5. The method for preparing a glass fiber stab-resistant fabric according to claim 1, characterized in that, The number of layers of the glass fiber fabric mentioned in step (4) is 18 to 20.

6. A glass fiber stab-resistant fabric, characterized in that, It is prepared by any one of the methods described in claims 1 to 5.