High-strength stain-resistant knitted fabric and processing technology thereof

Abstract

The invention provides a high-strength stain-resistant knitted fabric and a production process thereof, and relates to the technical field of textiles. The high-strength stain-resistant knitted fabric is obtained by spinning and double-strand spiral winding weaving of a composite fiber material, in the weaving process of the knitted fabric, circulation is formed among the yarns through the needle hooks, and a net-shaped structure is formed. Wherein the composite fiber material comprises 35-45% of polyester fiber, 25-35% of modal fiber and 20-40% of modified plant fiber. According to the high-strength stain-resistant knitted fabric and the processing technology thereof provided by the invention, the stain resistance and the strength of the knitted fabric are remarkably improved through an innovative structural design and an advanced processing technology. By utilizing the characteristics of the polyester fibers, the knitted fabric not only has an excellent cleaning function, but also can keep good use performance in severe environments such as high pollution and high-strength friction, and has a wide market application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, and in particular to high-strength stain-resistant knitted fabric and a processing technology thereof. Background Art

[0002] With the development of modern industry and the improvement of people's living standards, the requirements for textiles are also increasing. As one of the important textiles, knitted fabrics are widely used in many fields such as clothing, home furnishings, and medical treatment due to their good softness, breathability, and elasticity. However, when faced with high-intensity use and complex environments, traditional knitted fabrics often have problems such as poor stain resistance and easy wear, which limits their further application scope. Specifically, traditional knitted fabric materials have weak resistance to pollutants such as oil stains and water stains. Once contaminated, it is difficult to clean thoroughly, affecting the appearance and service life. At the same time, when subjected to high-intensity friction or tension, knitted fabrics are prone to damage or deformation, making it difficult to meet the durability requirements of textiles in specific industries.

[0003] High-strength stain-resistant knitted fabric is an advanced textile that combines high strength with excellent stain resistance. It is designed to meet the special needs of modern industry, outdoor activities and demanding life scenarios. This knitted fabric overcomes the limitations of traditional knitted fabrics in durability and stain resistance through innovative technology and material selection, becoming an important innovation in the textile industry. High-strength stain-resistant knitted fabric uses high-strength and high-weather resistance fiber materials as the base material, such as ultra-fine denier polyester, nylon, nylon, etc. These fiber materials themselves have excellent physical properties and chemical stability, and can withstand high-intensity stretching, tearing and abrasion while maintaining shape stability and durability under long-term use. In addition, in order to further improve the stain resistance, the surface of the knitted fabric is usually specially treated, such as coating a layer of anti-fouling layer made of special nanomaterials. This anti-fouling layer can form a hydrophobic and oleophobic barrier, effectively resisting the erosion of various liquid and solid pollutants, keeping the knitted fabric clean and beautiful.

[0004] In addition, since high-strength stain-resistant knitted fabric has excellent physical properties and chemical stability, as well as excellent stain resistance, it is widely used in many fields. In the clothing industry, it is often used to make outdoor sportswear, work clothes and other clothing that need to withstand high-intensity use and complex environments; in the field of household goods, high-strength stain-resistant knitted fabric can be used to make sofa covers, curtains and other home decorations that are easy to clean and maintain; in the medical field, its antibacterial and stain-resistant properties also make it one of the important choices for medical textiles. Based on this, the present invention provides high-strength stain-resistant knitted fabric and its processing technology. Summary of the invention

[0005] The purpose of the present invention is to provide a high-strength stain-resistant knitted fabric and a processing technology thereof, thereby optimizing the strength and antibacterial and stain-resistant properties of the knitted fabric.

[0006] On the one hand, the present invention provides a high-strength and stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it through double-strand spiral winding; during the weaving process of the knitted fabric, a loop is formed between the yarns through a needle hook to form a mesh structure; wherein the composite fiber material includes 35-45% polyester fiber, 25-35% modal fiber and 20-40% modified plant fiber.

[0007] Furthermore, the breaking elongation of a single fiber with a diameter of 0.15 mm-0.20 mm of the composite fiber material is 28.7-34.5%; and the breaking strength is 12.5-13.4 N / tex.

[0008] Furthermore, the preparation method of the modified plant fiber comprises: putting 20-24 parts of pretreated plant fiber, 80-86 parts of polypropylene, 20-24 parts of high-density polyethylene, 5-9 parts of nano titanium dioxide and 3-5 parts of coconut shell activated carbon into a high-speed mixer, stirring and heating to 110-120° C., and stirring for 60-80 minutes to obtain the modified plant fiber.

[0009] Furthermore, the plant fiber pretreatment method comprises: mixing wormwood fiber and bamboo leaf fiber, immersing in 3-4% sodium hydroxide solution for 2-2.2 hours, adding a coupling agent, stirring at 75-85° C. for 3.2-3.8 hours for coupling.

[0010] Furthermore, the weight ratio of the wormwood fiber, the bamboo leaf fiber and the coupling agent is (40-46):

[0011] (12-18):(1-1.4).

[0012] Furthermore, the sizes of the wormwood fiber and the bamboo leaf fiber are 160-200 meshes.

[0013] Furthermore, the coupling agent comprises bis(dioctyloxypyrophosphate)ethylene titanate and γ-aminopropyltriethoxysilane in a weight ratio of (3-4):1.

[0014] Furthermore, the high-density polyethylene has a weight average molecular weight Mw of 100,000-150,000, a crystallinity of 75-85%, and a melt index of 4-8 g / 10 min under the test conditions of 230° C. and 2.16 KN.

[0015] On the other hand, the present invention also provides a processing technology for high-strength stain-resistant knitted fabric, the steps comprising:

[0016] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0017] (2) Weaving: The spun yarn is woven using a knitting machine; the warp density is 650 strands / 10cm, and the weft density is 522 strands / 10cm;

[0018] (3) Post-processing: The knitted fabric is subjected to singeing, mercerizing, dyeing, shaping, etc. to obtain the knitted fabric.

[0019] Singeing can remove hairiness and impurities on the surface; mercerizing can improve the gloss and feel of the cloth; dyeing can give the knitted fabric the desired color; and shaping can ensure that the knitted fabric maintains a stable shape and size during subsequent use.

[0020] Furthermore, during the singeing, the temperature of the cloth surface is controlled to be 130-140°C, and the singeing machine speed is 125-135m / min; in the mercerizing step, the caustic soda concentration is 160-180g / L, the machine speed is 60-70m / min, and the rolling rate of the caustic soda is 45-55%; the shaping step includes adding wax water with a concentration of 2.2-2.6% into the slurry tank of the shaping machine, and the shaping temperature is 135-145°C.

[0021] The beneficial effects of the present invention are:

[0022] (1) The present invention adopts a composite ratio of polyester fiber, modal fiber and modified plant fiber, and combines the weaving process of double-strand spiral winding, so that the knitted fabric of the present invention is significantly enhanced in physical properties. The addition of polyester fiber improves the wear resistance and wrinkle resistance of the fabric, the modal fiber gives the fabric a soft and comfortable touch, and the modified plant fiber not only enhances the bonding force between fibers, but also improves the breaking strength and breaking elongation of the overall fiber through its unique chemical structure, so that the knitted fabric has higher tensile strength and durability while maintaining softness.

[0023] (2) Nano-titanium dioxide and coconut shell activated carbon are incorporated into the preparation process of the modified plant fiber in the present invention. Both ingredients have good antibacterial properties and adsorption capacity. Nano-titanium dioxide can produce free radicals with strong oxidizing properties under light, effectively killing or inhibiting the growth of microorganisms such as bacteria and molds; coconut shell activated carbon, with its porous structure, can adsorb and fix odor molecules and stains in the air, thereby significantly improving the stain resistance and antibacterial properties of the knitted fabric. In addition, the natural antibacterial components of wormwood fiber and bamboo leaf fiber further enhance the antibacterial effect of the fabric.

[0024] (3) The present invention uses high-density polyethylene with a weight average molecular weight Mw of 100,000-150,000, a crystallinity of 75-85%, and a melt index of 4-8 g / 10 min at 230°C and 2.16 KN test conditions, which ensures a strong bond between the fibers and makes the modified plant fiber perform better in the knitted fabric. This high molecular weight helps to improve the breaking strength and modulus of the fiber, thereby enhancing the tensile strength and wear resistance of the entire knitted fabric. At the same time, the high crystallinity of HDPE (75-85%) further improves the thermal stability and dimensional stability of the fiber, allowing the knitted fabric to better resist deformation and aging during use.

[0025] (4) In the present invention, high-density polyethylene is used as the base material for preparing the modified plant fiber. Although HDPE itself does not directly contribute to the antibacterial and antifouling properties, its uniform distribution and good combination in the modified plant fiber provide a stable support structure for the entire knitted fabric system. This stable structure helps to maintain the uniform distribution and long-term effect of antibacterial components (such as nano-titanium dioxide and coconut shell activated carbon) in the fiber, thereby indirectly improving the antibacterial and antifouling properties of the knitted fabric and also improving the stability of the antibacterial and antifouling effects.

[0026] (5) The knitted fabric of the present invention uses a relatively high proportion of modified plant fibers, which are derived from renewable resources, reducing the dependence on petroleum-based chemical fibers and reducing carbon emissions in the production process, which is in line with the current concept of environmental protection and sustainable development. At the same time, the coupling agents and additives used in the modification process are carefully selected to ensure that while improving performance, no additional burden is imposed on the environment.

[0027] (6) By optimizing the spinning, weaving and post-processing process parameters, such as controlling the singeing temperature, machine speed, mercerizing concentration and shaping conditions, the present invention not only ensures the stability and consistency of the knitted fabric during the production process, but also significantly improves the surface finish, color brightness and dimensional stability of the finished product, making the final product more in line with market demand and consumer expectations. DETAILED DESCRIPTION

[0028] The technical scheme of the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the raw materials can be obtained commercially.

[0029] Example 1

[0030] This embodiment provides a high-strength and stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it in a double-strand spiral winding manner; wherein the composite fiber material comprises 40% polyester fiber, 30% modal fiber and 30% modified plant fiber;

[0031] The composite fiber material has a single fiber with a diameter of 0.17 mm and a breaking elongation of 31.6%; a breaking strength of 12.9 N / tex;

[0032] Plant fiber pretreatment: Mix the wormwood fiber and the bamboo leaf fiber, immerse them in a 3.5% sodium hydroxide solution for 2.1 hours, then add a coupling agent and stir for 3.5 hours at 80°C to obtain the obtained fiber;

[0033] Preparation method of modified plant fiber: put 22 parts of pretreated plant fiber, 83 parts of polypropylene, 22 parts of high-density polyethylene, 7 parts of nano titanium dioxide and 4 parts of coconut shell activated carbon into a high-speed mixer, stir and heat to 115°C, stir for 70 minutes to obtain;

[0034] The high-density polyethylene has a weight average molecular weight Mw of 125,000, a crystallinity of 80%, and a melt index of 6 g / 10 min at 230°C and 2.16 KN.

[0035] The weight ratio of the wormwood fiber, the bamboo leaf fiber and the coupling agent is 43:15:1.2; the size of the wormwood fiber and the bamboo leaf fiber is 180 mesh;

[0036] The coupling agent includes bis(dioctyloxypyrophosphate)ethylene titanate and gamma-aminopropyltriethoxysilane in a weight ratio of 3.5:1;

[0037] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0038] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0039] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0040] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 135° C., and the singeing machine speed is 130 m / min; during the mercerizing step, the caustic soda concentration is 170 g / L, the machine speed is 65 m / min, and the rolling rate of the caustic soda is 50%; the shaping step includes adding wax water with a concentration of 2.4% into the slurry tank of the shaping machine, and the shaping temperature is 140° C.

[0041] Example 2

[0042] This embodiment provides a high-strength and stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it in a double-strand spiral winding manner; wherein the composite fiber material comprises 35% polyester fiber, 25% modal fiber and 40% modified plant fiber;

[0043] The composite fiber material has a single fiber with a diameter of 0.15 mm and a breaking elongation of 28.7%; a breaking strength of 12.5 N / tex;

[0044] Plant fiber pretreatment: Mix the wormwood fiber and the bamboo leaf fiber, immerse them in a 3% sodium hydroxide solution for 2 hours, then add a coupling agent and stir for 3.2 hours at 75°C to obtain the obtained fiber;

[0045] Preparation method of modified plant fiber: put 20 parts of pretreated plant fiber, 80 parts of polypropylene, 20 parts of high-density polyethylene, 5 parts of nano titanium dioxide and 3 parts of coconut shell activated carbon into a high-speed mixer, stir and heat to 110°C, stir for 60 minutes to obtain;

[0046] The high-density polyethylene has a weight average molecular weight Mw of 100,000, a crystallinity of 75%, and a melt index of 4 g / 10 min at 230°C and 2.16 KN.

[0047] The weight ratio of the wormwood fiber, the bamboo leaf fiber and the coupling agent is 40:12:1; the size of the wormwood fiber and the bamboo leaf fiber is 160 mesh;

[0048] The coupling agent includes bis(dioctyloxypyrophosphate)ethylene titanate and gamma-aminopropyltriethoxysilane in a weight ratio of 3:1;

[0049] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0050] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0051] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0052] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 130° C., and the singeing machine speed is 125 m / min; during the mercerizing step, the caustic soda concentration is 160 g / L, the machine speed is 60 m / min, and the rolling rate of the caustic soda is 45%; the shaping step includes adding wax water with a concentration of 2.2% into the slurry tank of the shaping machine, and the shaping temperature is 135° C.

[0053] Example 3

[0054] This embodiment provides a high-strength and stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it in a double-strand spiral winding manner; wherein the composite fiber material comprises 45% polyester fiber, 35% modal fiber and 20% modified plant fiber;

[0055] The composite fiber material has a single fiber with a diameter of 0.20 mm and a breaking elongation of 34.5%; a breaking strength of 13.4 N / tex;

[0056] Plant fiber pretreatment: Mix the wormwood fiber and the bamboo leaf fiber, immerse them in a 4% sodium hydroxide solution for 2.2 hours, then add a coupling agent and stir for 3.8 hours at 85°C to obtain the obtained fiber;

[0057] Preparation method of modified plant fiber: put 24 parts of pretreated plant fiber, 86 parts of polypropylene, 24 parts of high-density polyethylene, 9 parts of nano titanium dioxide and 5 parts of coconut shell activated carbon into a high-speed mixer, stir and heat to 120°C, stir for 80 minutes to obtain;

[0058] The high-density polyethylene has a weight average molecular weight Mw of 150,000, a crystallinity of 85%, and a melt index of 8 g / 10 min at 230°C and 2.16 KN.

[0059] The weight ratio of the wormwood fiber, the bamboo leaf fiber and the coupling agent is 46:18:1.4; the size of the wormwood fiber and the bamboo leaf fiber is 200 mesh;

[0060] The coupling agent includes bis(dioctyloxypyrophosphate)ethylene titanate and gamma-aminopropyltriethoxysilane in a weight ratio of 4:1;

[0061] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0062] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0063] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0064] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 140° C., and the singeing machine speed is 135 m / min; in the mercerizing step, the caustic soda concentration is 180 g / L, the machine speed is 70 m / min, and the rolling rate of the caustic soda is 55%; the shaping step includes adding wax water with a concentration of 2.6% into the slurry tank of the shaping machine, and the shaping temperature is 145° C.

[0065] Example 4

[0066] This embodiment provides a high-strength and stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it in a double-strand spiral winding manner; wherein the composite fiber material comprises 35% polyester fiber, 35% modal fiber and 30% modified plant fiber;

[0067] The composite fiber material has a single fiber with a diameter of 0.18 mm and a breaking elongation of 30.5%; a breaking strength of 13.1 N / tex;

[0068] Plant fiber pretreatment: Mix the wormwood fiber and the bamboo leaf fiber, immerse them in a 3% sodium hydroxide solution for 2.2 hours, then add a coupling agent and stir for 3.8 hours at 75°C to obtain the obtained fiber;

[0069] Preparation method of modified plant fiber: put 20 parts of pretreated plant fiber, 86 parts of polypropylene, 20 parts of high-density polyethylene, 9 parts of nano titanium dioxide and 3 parts of coconut shell activated carbon into a high-speed mixer, stir and heat to 120°C, stir for 60 minutes to obtain;

[0070] The high-density polyethylene has a weight average molecular weight Mw of 150,000, a crystallinity of 75%, and a melt index of 8 g / 10 min at 230°C and 2.16 KN.

[0071] The weight ratio of the wormwood fiber, the bamboo leaf fiber and the coupling agent is 40:18:1; the size of the wormwood fiber and the bamboo leaf fiber is 200 mesh;

[0072] The coupling agent includes bis(dioctyloxypyrophosphate)ethylene titanate and gamma-aminopropyltriethoxysilane in a weight ratio of 3:1;

[0073] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0074] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0075] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0076] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 140° C., and the singeing machine speed is 125 m / min; during the mercerizing step, the caustic soda concentration is 180 g / L, the machine speed is 60 m / min, and the padding rate of the caustic soda is 55%; the shaping step includes adding wax water with a concentration of 2.2% into the slurry tank of the shaping machine, and the shaping temperature is 145° C.

[0077] Comparative Example 1

[0078] This comparative example provides a high-strength stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it through double-strand spiral winding; wherein the composite fiber material comprises 40% polyester fiber, 30% modal fiber and 30% modified plant fiber;

[0079] Plant fiber pretreatment: The bamboo leaf fiber was immersed in a 3.5% sodium hydroxide solution for 2.1 hours, and then a coupling agent was added and stirred at 80°C for 3.5 hours for coupling;

[0080] Preparation method of modified plant fiber: put 22 parts of pretreated plant fiber, 83 parts of polypropylene, 22 parts of high-density polyethylene, 7 parts of nano titanium dioxide and 4 parts of coconut shell activated carbon into a high-speed mixer, stir and heat to 115°C, stir for 70 minutes to obtain;

[0081] The high-density polyethylene has a weight average molecular weight Mw of 125,000, a crystallinity of 80%, and a melt index of 6 g / 10 min at 230°C and 2.16 KN.

[0082] The weight ratio of bamboo leaf fiber to coupling agent is 15:1.2; the size of bamboo leaf fiber is 180 mesh;

[0083] The coupling agent includes bis(dioctyloxypyrophosphate)ethylene titanate and gamma-aminopropyltriethoxysilane in a weight ratio of 3.5:1;

[0084] The composite fiber material has a single fiber with a diameter of 0.17 mm and a breaking elongation of 28.8%; a breaking strength of 12.4 N / tex;

[0085] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0086] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0087] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0088] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 135° C., and the singeing machine speed is 130 m / min; during the mercerizing step, the caustic soda concentration is 170 g / L, the machine speed is 65 m / min, and the rolling rate of the caustic soda is 50%; the shaping step includes adding wax water with a concentration of 2.4% into the slurry tank of the shaping machine, and the shaping temperature is 140° C.

[0089] Comparative Example 2

[0090] This comparative example provides a high-strength stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it through double-strand spiral winding; wherein the composite fiber material comprises 40% polyester fiber, 30% modal fiber and 30% modified plant fiber;

[0091] Plant fiber pretreatment: soak the wormwood fiber in 3.5% sodium hydroxide solution for 2.1 hours, then add a coupling agent and stir for 3.5 hours at 80°C to obtain the obtained fiber;

[0092] Preparation method of modified plant fiber: put 22 parts of pretreated plant fiber, 83 parts of polypropylene, 22 parts of high-density polyethylene, 7 parts of nano titanium dioxide and 4 parts of coconut shell activated carbon into a high-speed mixer, stir and heat to 115°C, stir for 70 minutes to obtain;

[0093] The high-density polyethylene has a weight average molecular weight Mw of 125,000, a crystallinity of 80%, and a melt index of 6 g / 10 min at 230°C and 2.16 KN.

[0094] The weight ratio of the wormwood fiber to the coupling agent is 43:1.2; the size of the wormwood fiber is 180 mesh;

[0095] The coupling agent includes bis(dioctyloxypyrophosphate)ethylene titanate and gamma-aminopropyltriethoxysilane in a weight ratio of 3.5:1;

[0096] The composite fiber material has a single fiber with a diameter of 0.17 mm and a breaking elongation of 28.6%; a breaking strength of 12.1 N / tex;

[0097] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0098] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0099] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0100] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 135° C., and the singeing machine speed is 130 m / min; during the mercerizing step, the caustic soda concentration is 170 g / L, the machine speed is 65 m / min, and the rolling rate of the caustic soda is 50%; the shaping step includes adding wax water with a concentration of 2.4% into the slurry tank of the shaping machine, and the shaping temperature is 140° C.

[0101] Comparative Example 3

[0102] This comparative example provides a high-strength stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it through double-strand spiral winding; wherein the composite fiber material comprises 40% polyester fiber, 30% modal fiber and 30% modified plant fiber;

[0103] Preparation method of modified plant fiber: put 22 parts of plant fiber, 83 parts of polypropylene, 22 parts of high-density polyethylene, 7 parts of nano titanium dioxide and 4 parts of coconut shell activated carbon into a high-speed mixer, stir and heat to 115°C, stir for 70 minutes to obtain;

[0104] The high-density polyethylene has a weight average molecular weight Mw of 125,000, a crystallinity of 80%, and a melt index of 6 g / 10 min at 230°C and 2.16 KN. The size of the wormwood fiber and the bamboo leaf fiber is 180 mesh.

[0105] The composite fiber material has a single fiber with a diameter of 0.17 mm and a breaking elongation of 21.5%; a breaking strength of 8.6 N / tex;

[0106] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0107] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0108] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0109] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 135° C., and the singeing machine speed is 130 m / min; during the mercerizing step, the caustic soda concentration is 170 g / L, the machine speed is 65 m / min, and the rolling rate of the caustic soda is 50%; the shaping step includes adding wax water with a concentration of 2.4% into the slurry tank of the shaping machine, and the shaping temperature is 140° C.

[0110] Comparative Example 4

[0111] This comparative example provides a high-strength stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it through double-strand spiral winding; wherein the composite fiber material comprises 40% polyester fiber, 30% modal fiber and 30% modified plant fiber;

[0112] The preparation method of the modified plant fiber is as follows: the wormwood fiber and the bamboo leaf fiber are mixed, immersed in a 3.5% sodium hydroxide solution for 2.1 hours, and then a coupling agent is added and stirred at 80° C. for 3.5 hours for coupling.

[0113] The high-density polyethylene has a weight average molecular weight Mw of 125,000, a crystallinity of 80%, and a melt index of 6 g / 10 min at 230°C and 2.16 KN.

[0114] The weight ratio of the wormwood fiber, the bamboo leaf fiber and the coupling agent is 43:15:1.2; the size of the wormwood fiber and the bamboo leaf fiber is 180 mesh;

[0115] The coupling agent includes bis(dioctyloxypyrophosphate)ethylene titanate and gamma-aminopropyltriethoxysilane in a weight ratio of 3.5:1;

[0116] The composite fiber material has a single fiber with a diameter of 0.17 mm and a breaking elongation of 22.3%; a breaking strength of 9.7 N / tex;

[0117] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0118] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0119] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0120] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 135° C., and the singeing machine speed is 130 m / min; during the mercerizing step, the caustic soda concentration is 170 g / L, the machine speed is 65 m / min, and the rolling rate of the caustic soda is 50%; the shaping step includes adding wax water with a concentration of 2.4% into the slurry tank of the shaping machine, and the shaping temperature is 140° C.

[0121] Comparative Example 5

[0122] This comparative example provides a high-strength stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it through double-strand spiral winding; wherein the composite fiber material comprises 30% polyester fiber, 30% modal fiber and 50% modified plant fiber;

[0123] Plant fiber pretreatment: Mix the wormwood fiber and the bamboo leaf fiber, immerse them in a 3.5% sodium hydroxide solution for 2.1 hours, then add a coupling agent and stir for 3.5 hours at 80°C to obtain the obtained fiber;

[0124] Preparation method of modified plant fiber: put 22 parts of pretreated plant fiber, 83 parts of polypropylene, 22 parts of high-density polyethylene, 7 parts of nano titanium dioxide and 4 parts of coconut shell activated carbon into a high-speed mixer, stir and heat to 115°C, stir for 70 minutes to obtain;

[0125] The high-density polyethylene has a weight average molecular weight Mw of 125,000, a crystallinity of 80%, and a melt index of 6 g / 10 min at 230°C and 2.16 KN.

[0126] The weight ratio of the wormwood fiber, the bamboo leaf fiber and the coupling agent is 43:15:1.2; the size of the wormwood fiber and the bamboo leaf fiber is 180 mesh;

[0127] The coupling agent includes bis(dioctyloxypyrophosphate)ethylene titanate and gamma-aminopropyltriethoxysilane in a weight ratio of 3.5:1;

[0128] The composite fiber material has a single fiber with a diameter of 0.17 mm and a breaking elongation of 27.5%; a breaking strength of 10.6 N / tex;

[0129] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0130] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0131] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0132] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 135° C., and the singeing machine speed is 130 m / min; during the mercerizing step, the caustic soda concentration is 170 g / L, the machine speed is 65 m / min, and the rolling rate of the caustic soda is 50%; the shaping step includes adding wax water with a concentration of 2.4% into the slurry tank of the shaping machine, and the shaping temperature is 140° C.

[0133] Comparative Example 6

[0134] This comparative example provides a high-strength stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it in a double-strand spiral winding manner; wherein the composite fiber material comprises polyester fiber and modal fiber in a weight ratio of 4:3; the composite fiber material has a single filament breaking elongation of 25.4% with a diameter of 0.17 mm; and a breaking strength of 9.5 N / tex;

[0135] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0136] (1) Spinning: Blending polyester fiber and modal fiber into blended yarn according to weight percentage;

[0137] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0138] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 135° C., and the singeing machine speed is 130 m / min; during the mercerizing step, the caustic soda concentration is 170 g / L, the machine speed is 65 m / min, and the rolling rate of the caustic soda is 50%; the shaping step includes adding wax water with a concentration of 2.4% into the slurry tank of the shaping machine, and the shaping temperature is 140° C.

[0139] Comparative Example 7

[0140] This comparative example provides a high-strength stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it through double-strand spiral winding; wherein the composite fiber material comprises 40% polyester fiber, 30% modal fiber and 30% modified plant fiber;

[0141] Plant fiber pretreatment: Mix the wormwood fiber and the bamboo leaf fiber, immerse them in a 3.5% sodium hydroxide solution for 2.1 hours, then add a coupling agent and stir for 3.5 hours at 80°C to obtain the obtained fiber;

[0142] Preparation method of modified plant fiber: put 22 parts of pretreated plant fiber, 83 parts of polypropylene, 22 parts of high-density polyethylene, 7 parts of nano titanium dioxide and 4 parts of coconut shell activated carbon into a high-speed mixer, stir and heat to 115°C, stir for 70 minutes to obtain;

[0143] The high-density polyethylene has a weight average molecular weight Mw of 125,000, a crystallinity of 60%, and a melt index of 10 g / 10 min at 230°C and 2.16 KN.

[0144] The weight ratio of the wormwood fiber, the bamboo leaf fiber and the coupling agent is 43:15:1.2; the size of the wormwood fiber and the bamboo leaf fiber is 180 mesh;

[0145] The coupling agent includes bis(dioctyloxypyrophosphate)ethylene titanate and gamma-aminopropyltriethoxysilane in a weight ratio of 3.5:1;

[0146] The composite fiber material has a single fiber with a diameter of 0.17 mm and a breaking elongation of 28.1%; a breaking strength of 11.4 N / tex;

[0147] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0148] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0149] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0150] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 135° C., and the singeing machine speed is 130 m / min; during the mercerizing step, the caustic soda concentration is 170 g / L, the machine speed is 65 m / min, and the rolling rate of the caustic soda is 50%; the shaping step includes adding wax water with a concentration of 2.4% into the slurry tank of the shaping machine, and the shaping temperature is 140° C.

[0151] Comparative Example 8

[0152] This comparative example provides a high-strength stain-resistant knitted fabric, which is obtained by spinning a composite fiber material and weaving it through double-strand spiral winding; wherein the composite fiber material comprises 40% polyester fiber, 30% modal fiber and 30% modified plant fiber;

[0153] Plant fiber pretreatment: Mix the wormwood fiber and the bamboo leaf fiber, immerse them in a 3.5% sodium hydroxide solution for 2.1 hours, then add a coupling agent and stir for 3.5 hours at 80°C to obtain the obtained fiber;

[0154] Preparation method of modified plant fiber: put 22 parts of pretreated plant fiber, 83 parts of polypropylene, 22 parts of high-density polyethylene, 7 parts of nano titanium dioxide and 4 parts of coconut shell activated carbon into a high-speed mixer, stir and heat to 115°C, stir for 70 minutes to obtain;

[0155] The high-density polyethylene has a weight average molecular weight Mw of 125,000, a crystallinity of 80%, and a melt index of 6 g / 10 min at 230°C and 2.16 KN.

[0156] The weight ratio of the wormwood fiber, the bamboo leaf fiber and the coupling agent is 43:15:1.2; the size of the wormwood fiber and the bamboo leaf fiber is 180 mesh;

[0157] The coupling agent includes bis(dioctyloxypyrophosphate)ethylene titanate and 3-methacryloxypropyltrimethoxysilane in a weight ratio of 3.5:1;

[0158] The composite fiber material has a single fiber with a diameter of 0.17 mm and a breaking elongation of 27.2%; a breaking strength of 10.8 N / tex;

[0159] The processing technology of the high-strength stain-resistant knitted fabric in this embodiment comprises the following steps:

[0160] (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage;

[0161] (2) Weaving: The spun yarn is knitted using a knitting machine. During the weaving process, the knitted fabric forms a loop between the yarns through the needle hook to form a mesh structure. The warp density is 650 strands / 10cm and the weft density is 522 strands / 10cm.

[0162] (3) Post-treatment: The knitted fabric is subjected to singeing, mercerizing, dyeing, and shaping to obtain the knitted fabric; during singeing, the fabric surface temperature is controlled to be 135° C., and the singeing machine speed is 130 m / min; during the mercerizing step, the caustic soda concentration is 170 g / L, the machine speed is 65 m / min, and the rolling rate of the caustic soda is 50%; the shaping step includes adding wax water with a concentration of 2.4% into the slurry tank of the shaping machine, and the shaping temperature is 140° C.

[0163] Test Example 1: The performance of the high-strength stain-resistant knitted fabrics prepared in the above Examples 1-4 and Comparative Examples 1-8 was investigated, and the performance test results are shown in Table 1 below:

[0164] Bursting strength: in accordance with GB / T7742.1 Bursting properties of textile fabrics Part 1: Determination of strength and bursting expansion;

[0165] Antibacterial performance test: Determined according to the antibacterial performance evaluation method in GB / T20944.3-2008;

[0166] Table 1

[0167]

[0168] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A high-strength stain-resistant knitted fabric, characterized in that: The knitted fabric is obtained by spinning a composite fiber material and weaving it in a double-strand spiral winding manner; during the weaving process, the knitted fabric forms a loop between the yarns through a needle hook to form a mesh structure; wherein the composite fiber material includes 35-45% polyester fiber, 25-35% modal fiber and 20-40% modified plant fiber.

2. A high-strength stain-resistant knitted fabric according to claim 1, characterized in that: The composite fiber material has a single fiber with a diameter of 0.15 mm to 0.20 mm and a breaking elongation of 28.7 to 34.5%; and a breaking strength of 12.5 to 13.4 N / tex.

3. The high-strength stain-resistant knitted fabric according to claim 1, characterized in that: The preparation method of the modified plant fiber comprises: putting 20-24 parts of pretreated plant fiber, 80-86 parts of polypropylene, 20-24 parts of high-density polyethylene, 5-9 parts of nano titanium dioxide and 3-5 parts of coconut shell activated carbon into a high-speed mixer, stirring and heating to 110-120° C., and stirring for 60-80 minutes to obtain the modified plant fiber.

4. A high-strength stain-resistant knitted fabric according to claim 3, characterized in that: The plant fiber pretreatment method comprises: mixing wormwood fiber and bamboo leaf fiber, immersing in 3-4% sodium hydroxide solution for 2-2.2 hours, adding a coupling agent, stirring for 3.2-3.8 hours at 75-85° C., and coupling to obtain the obtained fiber.

5. The high-strength stain-resistant knitted fabric according to claim 4, characterized in that: The weight ratio of the wormwood fiber, bamboo leaf fiber and coupling agent is (40-46): (12-18): (1-1.4).

6. The high-strength stain-resistant knitted fabric according to claim 4, characterized in that: The sizes of the wormwood fiber and the bamboo leaf fiber are 160-200 meshes.

7. The high-strength stain-resistant knitted fabric according to claim 4, characterized in that: The coupling agent comprises bis(dioctyloxypyrophosphate)ethylene titanate and gamma-aminopropyltriethoxysilane in a weight ratio of (3-4):

1.

8. The high-strength stain-resistant knitted fabric according to claim 3, characterized in that: The high-density polyethylene has a weight average molecular weight Mw of 100,000-150,000, a crystallinity of 75-85%, and a melt index of 4-8 g / 10 min under the test conditions of 230° C. and 2.16 KN.

9. A process for processing a high-strength stain-resistant knitted fabric according to any one of claims 1 to 8, characterized in that the steps include: (1) Spinning: Blending polyester fiber, modal fiber and modified plant fiber into blended yarn according to weight percentage; (2) Weaving: The spun yarn is woven using a knitting machine; the warp density is 650 strands / 10cm, and the weft density is 522 strands / 10cm; (3) Post-processing: The knitted fabric is subjected to singeing, mercerizing, dyeing, shaping, etc. to obtain the knitted fabric.

10. The processing technology of high-strength stain-resistant knitted fabric according to claim 9, characterized in that: During the singeing, the temperature of the cloth surface is controlled to be 130-140°C, and the singeing machine speed is 125-135m / min; in the mercerizing step, the caustic soda concentration is 160-180g / L, the machine speed is 60-70m / min, and the rolling rate of the caustic soda is 45-55%; the shaping step includes adding wax water with a concentration of 2.2-2.6% into the slurry tank of the shaping machine, and the shaping temperature is 135-145°C.

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