Antibacterial and mildew-proof cotton fabric and preparation method thereof

Abstract

This invention discloses an antibacterial and mildew-resistant cotton fabric and its preparation method, comprising a front and a back side of the fabric, which are connected by a bonding structure. The back side includes a fifth region, a sixth region, and a fourth base fabric region. The fifth and sixth regions are alternately arranged in the fourth base fabric region along the length of the fabric. The fifth region is opposite to the first horizontal stripe region, and the sixth region is opposite to the second horizontal stripe region. In this invention, the mesh area on the back side of the fabric and the base fabric region on the front side form a relative structure. After the finishing liquid penetrates, in the photocuring process, the protrusions on the front side of the fabric and the base fabric region on the back side form a sandwich-like integral structure through the cured finishing liquid, which greatly improves the interlayer bonding force of the fabric. At the same time, the finishing liquid that penetrates into the interior and the fibers form a covalent bond structure, filling the fiber gaps without forming a hard shell coating. Combined with the high and low gradient distribution formed on the front side of the fabric, the fabric increases tensile strength while maintaining flexibility.

Description

Technical Field

[0001] This invention relates to the field of textiles, and more specifically, to an antibacterial and mildew-resistant cotton fabric and its preparation method. Background Technology

[0002] Traditional antibacterial and mildew-resistant cotton fabrics rely on the physical adsorption of finishing solutions to accumulate on the fiber surface. After repeated washing, these finishing solutions will come off, thus reducing the antibacterial and mildew-resistant properties of the cotton fabric. Furthermore, the finishing solution forms a coating on the fabric surface through physical adsorption. When the fibers are bent, the fabric surface is subjected to extreme tensile stress, which leads to the formation of microcracks in the fabric, thereby reducing its mechanical properties. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an antibacterial and mildew-resistant cotton fabric and its preparation method. The front side of the fabric includes a base fabric area and a raised portion, and the reverse side of the fabric includes a base fabric area and a mesh area. During the padding process, the finishing liquid can quickly and evenly penetrate into the fabric through the mesh, achieving uniform distribution of the finishing liquid throughout the fabric, ensuring the antibacterial and mildew-resistant effect of each part of the fabric. The mesh area on the reverse side of the fabric and the base fabric area on the front side form a relative structure. After the finishing liquid penetrates, in the light curing process, the raised portion on the front side of the fabric and the base fabric area on the reverse side form a sandwich-like integral structure through the cured finishing liquid, which greatly improves the interlayer bonding force of the fabric and avoids the finishing liquid from falling off during use. At the same time, the finishing liquid that penetrates into the interior and the fibers form a covalent bond structure, filling the fiber gaps without forming a hard shell coating. Combined with the high and low gradient distribution formed in the first and second horizontal stripe areas on the front side of the fabric, the fabric increases tensile strength while maintaining flexibility.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an antibacterial and mildew-proof cotton fabric, comprising a front side and a back side of the fabric, wherein the front side and the back side of the fabric are connected by a bonding structure;

[0005] The front side of the fabric includes a first horizontal stripe area and a second horizontal stripe area, which are arranged alternately and cyclically along the length of the fabric. The first horizontal stripe area includes a first region and a second region, which are arranged alternately and cyclically along the width of the fabric. The second horizontal stripe area includes a third region and a fourth region, which are arranged alternately and cyclically along the width of the fabric. The first region and the third region are connected along the length of the fabric, and the second region and the fourth region are connected along the length of the fabric.

[0006] The reverse side of the fabric includes a fifth region, a sixth region, and a fourth base fabric region. The fifth region and the sixth region are arranged alternately and cyclically in the fourth base fabric region along the length of the fabric. The fifth region is opposite to the first horizontal stripe region, and the sixth region is opposite to the second horizontal stripe region.

[0007] The present invention is further configured such that the first region includes two first protrusions arranged along the width direction and a first unit located between the two first protrusions, the first unit including a first base fabric area and two second protrusions arranged along the length direction of the fabric, the second region including a second base fabric area and two third protrusions arranged along the length direction of the fabric, and the second protrusions and the third protrusions are located on the same horizontal line along the width direction of the fabric.

[0008] The present invention is further configured such that the first protrusion is higher than the second protrusion, the second protrusion is higher than the first base fabric area, and the third protrusion is at the same height as the second protrusion.

[0009] The present invention is further configured such that the third region includes two rows of first units arranged along the fabric width direction and a first protrusion located between the two rows of first units; the fourth region includes an N-shaped fourth protrusion, two fifth protrusions and a third base fabric area; the fifth protrusion and the third base fabric area are located inside the triangle formed by the straight side and the hypotenuse of the fourth protrusion; and the second protrusion and the fifth protrusion are located on the same horizontal line along the fabric width direction.

[0010] The present invention is further configured such that the fourth protrusion is at the same height as the first protrusion, and the fifth protrusion is at the same height as the second protrusion.

[0011] The present invention is further configured such that the fifth region includes a plurality of first mesh areas and a plurality of second mesh areas, the first mesh areas and the second mesh areas are grouped in groups of three along the fabric length direction, and each group of first mesh areas and each group of second mesh areas are arranged alternately in parallel along the fabric width direction; the sixth region includes two groups of first mesh areas arranged in parallel along the fabric width direction, each group of first mesh areas includes three first mesh areas, and the two groups of first mesh areas in the sixth region are arranged alternately with one group of first mesh areas in the fifth region.

[0012] The present invention is further configured such that the second mesh area is larger than the first mesh area, each group of the first mesh areas located in the fifth region is opposite to the first base fabric area located in the first unit, each group of the second mesh areas located in the fifth region is opposite to the second base fabric area located in the second region, and each group of the first mesh areas located in the sixth region is opposite to the first base fabric area located in the third region.

[0013] This invention also discloses a preparation process for antibacterial and mildew-resistant cotton fabric, comprising the following steps:

[0014] S1: Fiber pretreatment, which processes raw cotton into combed fine cotton fibers;

[0015] S2: Spinning, spinning combed fine cotton fibers into 60-count double-ply combed cotton yarn;

[0016] S3: Needle arrangement, both the needle plate and the needle cylinder have 4 needles. The needle arrangement sequence of the needle plate is 1424143434343434……, and the needle arrangement sequence of the needle cylinder is 1122112243222423……;

[0017] S4: Weaving, the fabric is formed by weaving in 22 rows of loops, the front side of the fabric is formed by needle cylinder weaving in 14 rows of loops, and the back side of the fabric is formed by needle plate weaving in 14 rows of loops.

[0018] S5: Unloading and post-processing.

[0019] The present invention is further configured such that the post-treatment adopts an impregnation and rolling process, including the following steps:

[0020] S5.1: Preparation of finishing solution: Dissolve Ag / N-TiO2 bistable nano-dispersion slurry, polymerizable quaternary ammonium salt monomer, bifunctional silane coupling agent and photoinitiator in water at a ratio of 20-30 g / L: 25-35 g / L: 4-6 g / L: 1-3 g / L, and adjust the pH value to 6.0-7.0;

[0021] The Ag / N-TiO2 bistable nano-dispersion slurry formulation consists of the following components by mass percentage:

[0022] Ag / N co-doped TiO2 nanopowder: 18-22%;

[0023] Carboxymethyl chitosan: 2-4%;

[0024] Sodium hexametaphosphate: 3-5%;

[0025] The remainder is deionized water;

[0026] S5.2: Padding treatment: Immerse the cotton fabric in the finishing solution, controlling the liquid retention rate to 65-75%;

[0027] S5.3: Pre-drying treatment: Dry the impregnated cotton fabric at 75-85℃ for 1-3 minutes;

[0028] S5.4: Photocuring and crosslinking: Using a UV-LED light source with a wavelength of 365nm, the pre-dried cotton fabric is irradiated for 2-4 minutes under an irradiation intensity of 25-35mW / cm².

[0029] The present invention is further configured such that the preparation method of the Ag / N-TiO2 bistable nano-dispersion slurry includes the following steps:

[0030] S5.1.1: Preparation of Ag / N-TiO2 nanopowder: using tetrabutyl titanate as titanium source and AgNO3 and NH4Cl as doping sources, the reaction was carried out at 75-85℃ for 1.5-2.5 hours using microwave-assisted low-temperature hydrothermal method. After centrifugation, washing and freeze-drying, Ag / N co-doped TiO2 nanopowder was obtained.

[0031] S5.1.2: Pre-dispersion: Dissolve carboxymethyl chitosan in a portion of deionized water and stir until homogeneous to obtain a carboxymethyl chitosan solution;

[0032] S5.1.3: Blending and grinding: Add Ag / N co-doped TiO2 nanopowder, carboxymethyl chitosan solution, sodium hexametaphosphate and the remaining deionized water to a sand mill or high shear dispersion device, and grind and disperse at room temperature for 1-3 hours until the system reaches a homogeneous and stable state.

[0033] S5.1.4: Adjustment and filtration: Adjust the pH value of the obtained slurry to 6.0-7.0, and filter it using a 200-400 mesh filter to obtain the Ag / N-TiO2 bistable nano-dispersion slurry.

[0034] In summary, the present invention has the following beneficial effects:

[0035] 1. The front side of the fabric forms a base fabric area and raised sections, with the raised sections on the front side exhibiting a height gradient distribution. The reverse side of the fabric forms a base fabric area and a mesh area. The mesh area on the reverse side is opposite to a localized base fabric area on the front side, and the base fabric area on the reverse side forms a space with the localized raised sections on the front side. Therefore, during the padding process, the finishing liquid quickly and evenly penetrates into the fabric through the mesh area on the reverse side. During the photocuring process, the finishing liquid forms a sandwich-like integral structure between the raised sections on the front side and the base fabric area on the reverse side. This not only enhances the interlayer bonding of the fabric but also increases the stability of the finishing liquid's antibacterial and antifungal properties. The finishing liquid forms covalent bonds with the cotton fibers, and the finishing liquid that penetrates into the fabric evenly fills the fiber gaps and the space formed between the front and reverse sides of the fabric, forming a flexible filling layer. This is different from the hard shell coating formed by the physical adsorption of traditional finishing liquids, and it does not cause the fabric fibers to become stiff or lose elasticity.

[0036] 2. The fabric's front side features a gradient distribution of five raised sections (first, second, third, fourth, and fifth) that rapidly disperse external forces such as tension, bending, and compression, preventing stress concentration and micro-cracks. The mesh area on the reverse side buffers external forces through minute deformation of the mesh openings. After curing with the finishing liquid, the front and reverse sides of the fabric are further bonded together, and external forces are evenly distributed between them through a flexible sandwich structure. This reduces stress load on the front side and prevents structural damage to the reverse mesh area due to excessive formation. Furthermore, the finishing liquid on the fiber surface is firmly locked inside the fabric and on the fiber surface after light curing, preventing it from detaching after multiple washes. This solves the problem of reduced mechanical properties and functional degradation in traditional antibacterial and mildew-resistant cotton fabrics due to finishing agent detachment. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the front structure of an antibacterial and mildew-resistant cotton fabric in this embodiment;

[0038] Figure 2 This is a schematic diagram of the reverse side of an antibacterial and mildew-resistant cotton fabric in this embodiment;

[0039] Figure 3 for Figure 1 A sectional view along the A-A direction;

[0040] Figure 4 for Figure 1 A cross-sectional view along the B-B direction;

[0041] Figure 5 for Figure 1 A cross-sectional view along the C-C direction;

[0042] Figure 6 for Figure 1 Enlarged view of point D in the image;

[0043] Figure 7 for Figure 2 Enlarged view of point E in the image;

[0044] Figure 8 This is a triangular configuration diagram of an antibacterial and mildew-resistant cotton fabric in this embodiment;

[0045] Figure 9 This is a weaving pattern of an antibacterial and mildew-resistant cotton fabric in this embodiment.

[0046] Reference numerals: Fabric front side 1, first horizontal stripe area 11, first region 111, first protrusion 1111, first unit 1112, first base fabric area 11121, second protrusion 11122, second region 112, second base fabric area 1121, third protrusion 1122, second horizontal stripe area 12, third region 121, fourth region 122, fourth protrusion 1221, fifth protrusion 1222, third base fabric area 1223, Fabric reverse side 2, fifth region 21, sixth region 22, first mesh area 211, second mesh area 212, fourth base fabric area 23. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] like Figure 1 — Figure 9 As shown, this embodiment discloses an antibacterial and mildew-proof cotton fabric (antibacterial rate ≥99%, mildew-proof grade 0; after 50 washes, the antibacterial rate retention rate is ≥95% and the breaking strength retention rate is ≥90%), the preparation method of which includes double-sided loom weaving and fabric finishing steps.

[0049] The double-sided loom knitting process involves processing raw cotton into combed fine cotton fibers with a length of 28-32mm and a linear density of 1.5dtex. These fibers are then spun into 60-count double-ply combed cotton yarn. A 22-row loop knitting pattern is used, with each loop using 60-count double-ply combed cotton yarn. Each loop includes a needle plate and a needle cylinder, each containing four needles. The needle arrangement on the needle plate is 1424143434343434…, and the needle arrangement on the needle cylinder is 1122… 112243222423……, in a 22-coil row, the needles of the 1st, 2nd, 4th, 6th, 7th, 9th, 11th, 12th, 13th, 15th, 17th, 18th, and 20th coil rows, along with the 22nd coil row, knit together to form fabric face 1. The 1st, 3rd, and 5th coil rows are knitted together. The needles of the 6th, 8th, 10th, 11th, 12th, 14th, 16th, 17th, 19th, 21st, and 22nd coil rows knit together to form the reverse side 2 of the fabric. Therefore, the fabric includes the front side 1 and the reverse side 2. The needles of the 14th coil row knit together form the front side 1, and the needles of the 14th coil row knit together form the reverse side 2. In the 22-coil row, the needles of the 1st, 6th, 11th, 12th, 17th, and 22nd coil rows are knitted together with the needle cylinder. The needle cylinder knitting forms the front side 1 of the fabric, and the needle cylinder knitting forms the back side 2 of the fabric. Therefore, the 1st, 6th, 11th, 12th, 17th, and 22nd coil rows are the connecting structures, which connect the front side 1 of the fabric to the back side 2 of the fabric.

[0050] The fabric face 1 includes a first horizontal stripe area 11 and a second horizontal stripe area 12. In the knitting needles that form the loop rows of the fabric face 1, the needles of the first, second, fourth, sixth, seventh, ninth, and eleventh loop rows knit to form the first horizontal stripe area 11. The needles of the twelfth, thirteenth, fifteenth, seventeenth, eighteenth, twentieth, and twentyth loop rows knit to form the second horizontal stripe area 12. In the weave cycle, the first horizontal stripe area 11 and the second horizontal stripe area 12 alternately cycle along the length of the fabric. In the first horizontal stripe area 11, the needles of the first, second, fourth, sixth, seventh, ninth, and eleventh loop rows knit to form the first horizontal stripe area 11. The needle arrangement sequence of the cylinder for the first, second, fourth, sixth, seventh, ninth, and eleventh coil rows is 1122112243222423. Specifically, the needle arrangement sequence in the cylinder for the first, second, fourth, sixth, seventh, ninth, and eleventh coil rows is 112211, knitting to form the first area 111. The needle arrangement sequence in the cylinder for the first, second, fourth, sixth, seventh, ninth, and eleventh coil rows is 2243222423, knitting to form the first area 111. A second region 112 is formed, therefore the first horizontal stripe area 11 includes the first region 111 and the second region 112, and the first region 111 and the second region 112 are arranged alternately and cyclically along the fabric width direction. In the second horizontal stripe area 12, the needle arrangement sequence of the cylinder knitting needles in the 12th, 13th, 15th, 17th, 18th, 20th, and 22nd coil rows is 1122112243222423, where the needle arrangement sequence in the cylinder knitting needles in the 12th, 13th, 15th, 17th, 18th, 20th, and 22nd coil rows is 11221. The third region 121 is formed by knitting. The needles in the cylinder of the 12th, 13th, 15th, 17th, 18th, 20th, and 22nd loops are arranged in the sequence 2243222423 to form the fourth region 122. Therefore, the second horizontal stripe area 12 includes the third region 121 and the fourth region 122. The third region 121 and the fourth region 122 are arranged alternately and cyclically along the fabric width direction. This is because the first region 111 and the third region 121 are both formed by knitting with the needles in the cylinder arranged in the sequence 112211, and the second region 112 and the fourth region 122 are both formed by knitting with the needles in the cylinder arranged in the sequence 2243222423.Therefore, the first region 111 and the third region 121 are connected along the length of the fabric, and the second region 112 and the fourth region 122 are connected along the length of the fabric.

[0051] The reverse side of the fabric 2 includes a fifth region 21, a sixth region 22, and a fourth base fabric region 23. In the needles of the knitting disc that form the loop rows of the reverse side of the fabric 2, the loop rows are: 1st loop row, 3rd loop row, 5th loop row, 6th loop row, 8th loop row, 10th loop row, 11th loop row, 12th loop row, 14th loop row, 16th loop row, 17th loop row, and 19th loop row. The needle arrangement sequence of the 1st, 21st, and 22nd coil rows is 142414343434343434. The needles of the 1st, 6th, and 11th coil rows form the fifth region 21. The needles of the 12th, 17th, and 22nd coil rows form the sixth region 22. The needles of the 3rd and 5th coil rows... The needles of the 8th, 10th, 14th, 16th, 19th, and 21st coil rows knit together to form the fourth base fabric area 23. Therefore, the fifth area 21 and the sixth area 22 are arranged alternately and cyclically in the fourth base fabric area 23 along the length of the fabric. The needles of the coil rows in the fifth area 21 are located in the same coil row as the needles of the 1st, 6th, and 11th coil rows in the first horizontal strip area 11. Therefore, the fifth area 21 is opposite to the first horizontal strip area 11. The needles of the coil rows in the sixth area 22 are located in the same coil row as the needles of the 12th, 17th, and 22nd coil rows in the second horizontal strip area 12. Therefore, the sixth area 22 is opposite to the second horizontal strip area 12.

[0052] In the cylinder needles that knit the first region 111 rows of coils, needle 1 in rows 1, 2, 4, 6, 7, 9, and 11 knits forms the first protrusion 1111, and needle 2 knits the first unit 1112. The cylinder needles in the first region 111 are arranged in the order 112211. Therefore, the first region 111 includes two rows of first protrusions 1111 arranged along the width direction and a first unit 1112 located between the two rows of first protrusions 1111. In rows 1, 6, and 11, needle 1 does not knit, and needle 2 knits a loop. In the second, fourth, seventh, and ninth loop rows, needle 1 knits into loops, and needle 2 is a float. Therefore, needle 2 in the first, sixth, and eleventh loop rows knits to form the first base fabric area 11121, and needle 2 in the second, fourth, seventh, and ninth loop rows knits to form the second protrusion 11122. Thus, the first unit 1112 includes the first base fabric area 11121 and two rows of second protrusions 11122 arranged along the fabric length. The first base fabric area 11121 is knitted into loops, and the same yarn is knitted not only in the needle cylinder but also on the needle plate. Therefore, the first base fabric area 11121 is controlled by the needles on the needle plate. The fabric tends towards the reverse side 2, and the first protrusion 1111 is only knitted into loops in the needle cylinder, while the second protrusion 11122 is only knitted into floats in the needle cylinder. Because there is no needle restraint from the needle plate, the first protrusion 1111 and the second protrusion 11122 are higher than the first base fabric area 11121. Since the first protrusion 1111 is knitted into loops, it is higher than the floats of the second protrusion 11122. Therefore, the first protrusion 1111 is higher than the second protrusion 11122, and the second protrusion 11122 is higher than the first base fabric area 11121. In the needle cylinder knitting forming the loop rows of the second region 112, the needles in the first, sixth, and eleventh loop rows knit in the sequence 22432224323. In the second base fabric area 1121, the needles in the second, fourth, seventh, and ninth loop rows, arranged in the sequence 22432224323, form the third protrusion 1122. Therefore, the second region 112 includes the second base fabric area 1121 and two rows of third protrusions 1122 arranged along the fabric length. The second base fabric area 1121 is woven into loops, and the same yarn is woven not only in the cylinder but also on the needle plate. Therefore, the second base fabric area 1121 is drawn towards the reverse side 2 of the fabric by the needles on the needle plate. Both the third protrusion 1122 and the second protrusion 11122 are woven as floats, and the third protrusion 1122 and the second protrusion 11122 are located in the same loop row. Therefore, along the fabric width direction...The second protrusion 11122 and the third protrusion 1122 are located on the same horizontal line, and the third protrusion 1122 is at the same height as the second protrusion 11122.

[0053] In the cylinder needles knitting the third region 121, needle 1 in the 12th, 13th, 15th, 17th, 18th, 20th, and 22nd coil rows knits to form the first unit 1112, and needle 2 in the second coil row knits to form the first protrusion 1111. The cylinder needles in the third region 121 are arranged in the sequence 112211. Therefore, the third region 121 includes two first units 1112 arranged along the fabric width direction and a first protrusion 1111 located between the two first units 1112. In the 12th, 17th, and 22nd coil rows, needle 1 knits a loop, needle 2... Needle #1 does not knit. In the 13th, 15th, 18th, and 20th loop rows, needle #1 is a float, and needle #2 knits into a loop. Therefore, needle #1 in the 12th, 17th, and 22nd loop rows knits to form the first base fabric area 11121, and needle #2 in the 13th, 15th, 18th, and 20th loop rows knits to form the second protrusion 11122. Similarly, in the third region 121, the first base fabric area 11121 is formed because the same yarn in the 12th, 17th, and 22nd loop rows is knitted both in the needles of the cylinder and the needles of the dial. The first base fabric area 11121 is drawn towards the reverse side 2 of the fabric by the needles of the needle plate, while the first protrusion 1111 is only knitted into loops in the needle cylinder, and the second protrusion 11122 is only knitted into floats in the needle cylinder. Because the first protrusion 1111 and the second protrusion 11122 are not drawn by the needles of the needle plate, they are higher than the first base fabric area 11121. The first protrusion 1111, being knitted into loops, is higher than the floats of the second protrusion 11122. In the needle cylinder knitting forming the fourth region 122 loop rows, the needles in the 12th, 17th, and 22nd loop rows, with a sequence of 22432224323, knit to form the third base fabric area 1223. The needles in the 13th and 15th loop rows... In the needle cylinders of the 18th and 20th coil rows, needles in the sequence 22432224323 knit to form the fourth protrusion 1221 and the fifth protrusion 1222. Meanwhile, needles #2 and #3 in the needle cylinders of the 13th, 15th, 18th, and 20th coil rows knit loops, while needle #4 knits a float. Therefore, in the needle cylinders of the 12th, 17th, and 22nd coil rows, needle #4 knits loops, and needle #3 knits a tufted loop. Due to this influence, the fourth protrusion 1221 forms an N-shape. Thus, the fourth region 122 includes the N-shaped fourth protrusion 1221, two fifth protrusions 1222, and the third base fabric area 1223.The fourth protrusion 1221 is woven in the same way as the first protrusion 1111, and the fifth protrusion 1222 is woven in the same way as the second protrusion 11122. Therefore, the fourth protrusion 1221 is at the same height as the first protrusion 1111, and the fifth protrusion 1222 is at the same height as the second protrusion 11122. Furthermore, along the fabric width direction, the second protrusion 11122 and the fifth protrusion 1222 are located on the same horizontal line. Because the fourth protrusion 1221 is N-shaped, during the weaving process… The internal stress of the yarn causes the fifth protrusion 1222 and the third base fabric area 1223 to be located inside the triangle formed by the straight and hypotenuse of the fourth protrusion 1221. This results in a gradient distribution of the first protrusion 1111, the second protrusion 11122, the third protrusion 1122, the fourth protrusion 1221, and the fifth protrusion 1222 on the fabric's surface 1. This allows for the rapid dispersion of external forces such as tension, bending, and compression received by the fabric, thereby preventing stress concentration and the formation of microcracks.

[0054] In the needle arrangement forming the fifth region 21, the needles in the first, sixth, and eleventh loop rows with a needle sequence of 14241 are knitted together using needle #2 to form the first mesh area 211. The needles in the first, sixth, and eleventh loop rows with a needle sequence of 43434343434 are knitted together to form the second mesh area 212. Therefore, the fifth region 21 includes multiple first mesh areas 211 and multiple second mesh areas 212. Each first mesh area 211 and each second mesh area 212 is knitted within the first, sixth, and eleventh loop rows. Thus, the first mesh areas 211 and the second mesh areas... 212 are arranged in groups of three along the fabric length. The first mesh area 211 and the second mesh area 212 of each group are arranged alternately and cyclically along the fabric width. In the needles that form the sixth region 22, the needles in the 12th, 17th, and 22nd loop rows, with a needle sequence of 14241, knit together using needle number 1 to form the first mesh area 211. In the 14241 needles within the same loop row of the 12th, 17th, and 22nd loop rows, there are two needles of number 1. Therefore, the needles 14241 in each loop row of the 12th, 17th, and 22nd loop rows knit together to form... There are two first mesh areas 211, therefore the sixth region 22 includes two sets of first mesh areas 211 arranged side by side along the fabric width direction. Each set of first mesh areas 211 includes three first mesh areas 211. The two sets of first mesh areas 211 in the sixth region 22 are formed by tuck knitting with needle 1, and the set of first mesh areas 211 in the fifth region 21 is formed by tuck knitting with needle 2. However, regardless of whether it is in the loop row of the fifth region 21 or the loop row of the sixth region 22, the arrangement order of needle 2 is always between needle 1. Therefore, the two sets of first mesh areas 211 in the sixth region 22 and the set of first mesh areas 211 in the fifth region 21 are arranged alternately. Each first mesh area 211 has 5 needles. The second mesh area 212 is formed by knitting with 11 needles, therefore the second mesh area 212 is larger than the first mesh area 211. The needles of each group of first mesh areas 211 within the fifth region 21 are opposite to the needles of the first base fabric area 11121 within the first unit 1112, and the needles of each group of second mesh areas 212 within the fifth region 21 are opposite to the needles of the second base fabric area 1121 within the second region 112. Therefore, each group of first mesh areas 211 within the fifth region 21 is opposite to the first base fabric area 11121 within the first unit 1112, and each group of second mesh areas 212 within the fifth region 21 is opposite to the second base fabric area 1121 within the second region 112.The knitting needles of each group of first mesh areas 211 located in the sixth region 22 are opposite to the knitting needles of the first base fabric area 11121 located in the third region 121. Therefore, each group of first mesh areas 211 in the sixth region 22 is opposite to the first base fabric area 11121 in the third region 121, thereby forming a mesh area on the reverse side 2 of the fabric. The mesh area on the reverse side 2 is opposite to the base fabric area on the front side 1, thus the mesh area on the reverse side 2 is buffered by the small gaps between the first mesh areas 211 and the second mesh areas 212 under external force, reducing stress damage to the fabric.

[0055] Because the first, sixth, eleventh, twelfth, eleventh, and twentieth coil rows are woven not only on the needle plate but also in the needle cylinder, they connect the front side 1 and the back side 2 of the fabric. The second, fourth, seventh, ninth, thirteenth, fifteenth, eighteenth, and twentieth coil rows are woven only in the needle cylinder to form the front side 1 of the fabric. The third, fifth, eighth, tenth, fourteenth, sixteenth, nineteenth, and twentyth coil rows are woven only on the needle plate. The fabric is knitted to form the reverse side 2. Therefore, there are no connection points between the 2nd, 4th, 7th, 9th, 13th, 15th, 18th, and 20th coil rows and the 3rd, 5th, 8th, 10th, 14th, 16th, 19th, and 21st coil rows. The knitting needles on the front side 1 form a raised part, and the knitting needles on the reverse side 2 also form the base fabric area. Therefore, there are no connection points between the front side 1 and the reverse side 2, and a certain space is formed between the raised part of the front side 1 and the base fabric area of ​​the reverse side 2.

[0056] The fabric finishing process uses a padding process, and the specific steps are as follows:

[0057] (a) Prepare the following Ag / N-TiO2 bistable nano-dispersion slurry by mass percentage: Ag / N co-doped TiO2 nanopowder: 18-22%, carboxymethyl chitosan: 2-4%, sodium hexametaphosphate: 3-5%, with the balance being deionized water. The specific formulation of the Ag / N-TiO2 bistable nano-dispersion slurry in this embodiment is: Ag / N co-doped TiO2 nanopowder: 20%, carboxymethyl chitosan: 3%, sodium hexametaphosphate: 4%, with the balance being deionized water.

[0058] Tetrabutyl titanate, AgNO3, and NH4Cl (tetrabutyl titanate as the titanium source, AgNO3 and NH4Cl as dopant sources) were weighed according to stoichiometric ratio and added to an ethanol solution and mixed thoroughly. The mixture was then reacted at 75-85℃ for 1.5-2.5 hours (2 hours in this example) using a microwave-assisted low-temperature hydrothermal method. After centrifugation, washing, and freeze-drying (freezing temperature -50℃, pressure 10MPa, freezing time 24 hours), Ag / N co-doped TiO2 nanoparticles were obtained. Carboxymethyl chitosan was dissolved in a portion of deionized water and stirred thoroughly to obtain a carboxymethyl chitosan solution (carboxymethyl chitosan content was...). 5wt%), Ag / N co-doped TiO2 nanopowder, carboxymethyl chitosan solution, sodium hexametaphosphate and the remaining deionized water are added to a sand mill or high shear dispersion device (a sand mill is used in this embodiment), and ground and dispersed at room temperature for 1-3 hours (3 hours in this embodiment) until the system reaches a homogeneous and stable state. The pH value of the obtained slurry is adjusted to 6.0-7.0 (the pH value is adjusted by dilute hydrochloric acid or sodium hydroxide according to the acidity or alkalinity of the final slurry. The pH value is adjusted to 7 in this embodiment), and filtered through a 400-mesh filter to obtain Ag / N-TiO2 bistable nano-dispersion slurry;

[0059] (b) Dissolve Ag / N-TiO2 bistable nano-dispersion slurry, polymerizable quaternary ammonium salt monomer, bifunctional silane coupling agent, and photoinitiator in water at a ratio of 20-30 g / L: 25-35 g / L: 4-6 g / L: 1-3 g / L, and adjust the pH to 6.0-7.0 to obtain a finishing solution. (In this embodiment, the polymerizable quaternary ammonium salt monomer used in the finishing solution is methacryloyloxyethyl ammonium chloride; the bifunctional silane coupling agent is γ-methacryloyloxypropyltrimethoxysilane; and the photoinitiator is 2-hydroxy-2-methyl-1-phenylpropanone. In this embodiment, the Ag / N-TiO2 bistable nano-dispersion slurry, polymerizable quaternary ammonium salt monomer, bifunctional silane coupling agent, and photoinitiator are dissolved in water at a ratio of 20-30 g / L: 25-35 g / L: 4-6 g / L: 1-3 g / L.) The concentrations of the quaternary ammonium salt monomer, the bifunctional silane coupling agent, and the photoinitiator were 25 g / L, 30 g / L, 5 g / L, and 2 g / L, respectively. The pH was adjusted using citric acid or ammonia based on the acidity or alkalinity of the finishing solution; in this embodiment, the pH was adjusted to 7. The cotton fabric was then padded with this finishing solution (liquor ratio 1:20), controlling the liquid retention rate of the treated cotton fabric to 65-75% (70% in this embodiment). The padded cotton fabric was dried at 75-85°C for 1-3 minutes (3 minutes in this embodiment) using a 365 nm UV-LED light source with an irradiance of 25-35 mW / cm². 2 Under these conditions, the pre-dried cotton fabric is irradiated for 2-4 minutes (the actual irradiation intensity used in this embodiment is 30mW / cm²). 2 The irradiation time is 3 minutes.

[0060] In fabric finishing, the finishing solution quickly and evenly penetrates into the fabric interior through the mesh area of ​​the reverse side 2. During the photocuring process, the finishing solution forms a sandwich-like integral structure between the raised portion of the front side 1 and the base fabric area of ​​the reverse side 2. This not only enhances the bonding between the front and reverse sides 1 and improves the interlayer adhesion, but also firmly locks the finishing solution inside the fabric and on the fiber surface after photocuring, preventing it from falling off after multiple washes. This increases the stability of the finishing solution's antibacterial and antifungal properties. Covalent bonds are formed between cotton fibers. The finishing liquid that penetrates into the fabric is evenly filled in the gaps between fibers and the space between the protrusions on the front side 1 and the base fabric area on the back side 2 through the action of covalent bonds. This forms a flexible filling, which is different from the hard shell coating formed by the physical adsorption of traditional finishing liquids. It will not cause the fabric fibers to become stiff or lose their elasticity. At the same time, the flexible sandwich structure between the front side 1 and the back side 2 of the fabric will evenly distribute and reduce the slippage and misalignment of fibers under external forces. This will reduce the stress load on the front side 1 of the fabric and avoid structural damage caused by excessive formation of the mesh area on the back side 2 of the fabric.

[0061] According to the test, the antibacterial and mildew-resistant cotton fabric prepared in this embodiment has an antibacterial rate of 99.9% (tested according to JIS Z 2801:2012 standard), a mildew resistance level of 0 (tested according to GB / T 24346-2009 standard), and an antibacterial rate retention rate of 96.5% and a breaking strength retention rate of 92.3% after 50 washes according to AATCC 61-2A standard (tested according to GB / T 3923.1-2021 standard).

[0062] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An antibacterial and mildew-resistant cotton fabric, characterized in that, It includes a front side (1) and a back side (2) of fabric, wherein the front side (1) and the back side (2) of fabric are connected by a bonding structure; The front side of the fabric (1) includes a first horizontal stripe area (11) and a second horizontal stripe area (12). The first horizontal stripe area (11) and the second horizontal stripe area (12) are arranged alternately and cyclically along the length of the fabric. The first horizontal stripe area (11) includes a first region (111) and a second region (112). The first region (111) and the second region (112) are arranged alternately and cyclically along the width of the fabric. The second horizontal stripe area (12) includes a third region (121) and a fourth region (122). The third region (121) and the fourth region (122) are arranged alternately and cyclically along the width of the fabric. The first region (111) and the third region (121) are connected along the length of the fabric, and the second region (112) and the fourth region (122) are connected along the length of the fabric. The reverse side (2) of the fabric includes a fifth region (21), a sixth region (22) and a fourth base fabric region (23). The fifth region (21) and the sixth region (22) are alternately arranged in the fourth base fabric region (23) along the length of the fabric. The fifth region (21) is opposite to the first horizontal stripe region (11), and the sixth region (22) is opposite to the second horizontal stripe region (12).

2. The antibacterial and mildew-resistant cotton fabric according to claim 1, characterized in that, The first region (111) includes two first protrusions (1111) arranged along the width direction and a first unit (1112) located between the two first protrusions (1111). The first unit (1112) includes a first base fabric area (11121) and two second protrusions (11122) arranged along the length direction of the fabric. The second region (112) includes a second base fabric area (1121) and two third protrusions (1122) arranged along the length direction of the fabric. Along the width direction of the fabric, the second protrusions (11122) and the third protrusions (1122) are located on the same horizontal line.

3. The antibacterial and mildew-resistant cotton fabric according to claim 2, characterized in that, The first protrusion (1111) is higher than the second protrusion (11122), the second protrusion (11122) is higher than the first base fabric area (11121), and the third protrusion (1122) is at the same height as the second protrusion (11122).

4. The antibacterial and mildew-resistant cotton fabric according to claim 2, characterized in that, The third region (121) includes two rows of first units (1112) arranged along the fabric width direction and a first protrusion (1111) located between the two rows of first units (1112). The fourth region (122) includes an N-shaped fourth protrusion (1221), two fifth protrusions (1222) and a third base fabric area (1223). The fifth protrusions (1222) and the third base fabric area (1223) are located inside the triangle formed by the straight side and the hypotenuse of the fourth protrusion (1221). Along the fabric width direction, the second protrusion (11122) and the fifth protrusion (1222) are located on the same horizontal line.

5. The antibacterial and mildew-resistant cotton fabric according to claim 4, characterized in that, The fourth protrusion (1221) is at the same height as the first protrusion (1111), and the fifth protrusion (1222) is at the same height as the second protrusion (11122).

6. The antibacterial and mildew-resistant cotton fabric according to claim 2, characterized in that, The fifth region (21) includes multiple first mesh areas (211) and multiple second mesh areas (212). The first mesh areas (211) and the second mesh areas (212) are arranged in groups of three along the fabric length direction. Each group of first mesh areas (211) and each group of second mesh areas (212) are arranged alternately along the fabric width direction. The sixth region (22) includes two groups of first mesh areas (211) arranged in parallel along the fabric width direction. Each group of first mesh areas (211) includes three first mesh areas (211). The two groups of first mesh areas (211) in the sixth region (22) and the group of first mesh areas (211) in the fifth region (21) are arranged alternately.

7. The antibacterial and mildew-resistant cotton fabric according to claim 6, characterized in that, The second mesh area (212) is larger than the first mesh area (211). Each group of the first mesh areas (211) in the fifth region (21) is opposite to the first base fabric area (11121) in the first unit (1112). Each group of the second mesh areas (212) in the fifth region (21) is opposite to the second base fabric area (1121) in the second region (112). Each group of the first mesh areas (211) in the sixth region (22) is opposite to the first base fabric area (11121) in the third region (121).

8. A method for preparing an antibacterial and mildew-resistant cotton fabric according to any one of claims 1-7, characterized in that, Includes the following steps: S1: Fiber pretreatment, which processes raw cotton into combed fine cotton fibers; S2: Spinning, spinning combed fine cotton fibers into 60-count double-ply combed cotton yarn; S3: Needle arrangement, both the needle plate and the needle cylinder have 4 needles. The needle arrangement sequence of the needle plate is 1424143434343434……, and the needle arrangement sequence of the needle cylinder is 1122112243222423……; S4: Weaving, the fabric is formed by weaving in 22 rows of loops, the front side of the fabric is formed by needle cylinder weaving in 14 rows of loops (1), and the back side of the fabric is formed by needle plate weaving in 14 rows of loops (2). S5: Unloading and post-processing.

9. The method for preparing an antibacterial and mildew-resistant cotton fabric according to claim 8, characterized in that, The finishing process employs a padding process, including the following steps: S5.1: Preparation of finishing solution: Dissolve Ag / N-TiO2 bistable nano-dispersion slurry, polymerizable quaternary ammonium salt monomer, bifunctional silane coupling agent and photoinitiator in water at a ratio of 20-30 g / L: 25-35 g / L: 4-6 g / L: 1-3 g / L, and adjust the pH value to 6.0-7.0; The Ag / N-TiO2 bistable nano-dispersion slurry formulation consists of the following components by mass percentage: Ag / N co-doped TiO2 nanopowder: 18-22%; Carboxymethyl chitosan: 2-4%; Sodium hexametaphosphate: 3-5%; The remainder is deionized water; S5.2: Padding treatment: Immerse the cotton fabric in the finishing solution, controlling the liquid retention rate to 65-75%; S5.3: Pre-drying treatment: Dry the impregnated cotton fabric at 75-85℃ for 1-3 minutes; S5.4: Photocuring and crosslinking: Using a UV-LED light source with a wavelength of 365nm, the pre-dried cotton fabric is irradiated for 2-4 minutes under an irradiation intensity of 25-35mW / cm².

10. The method for preparing an antibacterial and mildew-resistant cotton fabric according to claim 9, characterized in that, The preparation method of the Ag / N-TiO2 bistable nano-dispersion slurry includes the following steps: S5.1.1: Preparation of Ag / N-TiO2 nanopowder: using tetrabutyl titanate as titanium source and AgNO3 and NH4Cl as doping sources, the reaction was carried out at 75-85℃ for 1.5-2.5 hours using microwave-assisted low-temperature hydrothermal method. After centrifugation, washing and freeze-drying, Ag / N co-doped TiO2 nanopowder was obtained. S5.1.2: Pre-dispersion: Dissolve carboxymethyl chitosan in a portion of deionized water and stir until homogeneous to obtain a carboxymethyl chitosan solution; S5.1.3: Blending and grinding: Add Ag / N co-doped TiO2 nanopowder, carboxymethyl chitosan solution, sodium hexametaphosphate and the remaining deionized water to a sand mill or high shear dispersion device, and grind and disperse at room temperature for 1-3 hours until the system reaches a homogeneous and stable state. S5.1.4: Adjustment and filtration: Adjust the pH value of the obtained slurry to 6.0-7.0, and filter it using a 200-400 mesh filter to obtain the Ag / N-TiO2 bistable nano-dispersion slurry.

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