Bamboo-cotton plain double-layer gauze and preparation method thereof

Abstract

The application relates to the technical field of cloth processing, in particular to a bamboo-cotton plain double-layer gauze and a preparation method thereof, which is prepared from the following raw materials in percentage by weight: 25-35% of cotton fibers and 65-75% of viscose fibers; the viscose fibers are prepared from the following components in parts by weight: 20-30 parts of bamboo pulp, 10-15 parts of viscose cellulose solution and 5-8 parts of a modifier, wherein the modifier is obtained by mixing chitin nanowhiskers, activated carbon and a silane coupling agent. The bamboo-cotton plain double-layer gauze prepared from the above-mentioned compounded raw materials has good wear resistance and durability, is not prone to pilling and deformation during use, and has good softness and skin friendliness.

Description

Technical Field

[0001] This application relates to the field of fabric processing technology, and more specifically, to a bamboo cotton plain weave double-layer gauze and its preparation method. Background Technology

[0002] Double-layer gauze fabric, as a special textile, is widely used in maternity and baby products, underwear, and bedding due to its softness, comfort, moisture absorption, breathability, and environmental friendliness. Originally derived from medical gauze, this fabric has been improved while retaining its original excellent properties, enhancing its applicability and user experience. However, cotton double-sided yarn has a lower yarn density, resulting in relatively poor stability and abrasion resistance. Especially during washing and wearing, double-layer gauze fabric is prone to wrinkles and deformation, leading to a shorter lifespan. Furthermore, due to its lower yarn density, the fabric is prone to pilling and shedding, which not only affects its appearance but may also cause skin irritation. With the increasing demand for high-quality living among consumers, the research and development and production technology of double-layer gauze fabric are continuously advancing.

[0003] In existing technologies, various methods are typically employed to improve the stability and durability of double-layered gauze fabrics. Common methods include increasing yarn density, using high-strength fibers, and adding functional coatings. For example, increasing yarn density can enhance the overall strength and wrinkle resistance of the fabric; using high-strength fibers such as polyester can improve the fabric's abrasion resistance.

[0004] While the methods described above can improve the performance of double-layer gauze fabric to some extent, they still cannot completely solve the problems of poor stability and abrasion resistance, as well as the shedding of lint from balloons. Therefore, how to further improve the stability and abrasion resistance of double-layer gauze fabric has become an urgent technical problem to be solved. Summary of the Invention

[0005] To address the issues of poor stability, poor abrasion resistance, and easy pilling and shedding of double-layer yarn, this application provides a bamboo cotton plain weave double-layer yarn fabric and its preparation method.

[0006] In the first aspect, this application provides a bamboo-cotton plain weave double-layer gauze, which adopts the following technical solution:

[0007] A bamboo-cotton plain-weave double-layer gauze is prepared from the following raw materials in weight percentages:

[0008] 25-35% cotton fiber

[0009] Viscose fiber 65-75%;

[0010] The viscose fiber was prepared from the following parts by weight:

[0011] 20-30 parts of bamboo pulp

[0012] 10-15 parts of viscose cellulose solution

[0013] 5-8 parts of modifier

[0014] The modifier is obtained by mixing chitin nano whiskers, activated carbon, and a silane coupling agent.

[0015] By adopting the above technical solution, the prepared bamboo cotton plain weave double-layer gauze has good wear resistance and durability, and is not easy to pill or deform during use, and has good softness and skin-friendliness.

[0016] The combination of cotton and viscose fibers creates a stable fiber structure, thereby improving the overall stability and durability of the double-layer yarn. The combination of cotton and viscose fibers forms a stable fiber structure, where cotton fibers possess good strength and toughness, while viscose fibers offer good softness and elasticity. This combination allows the fabric to maintain a stable shape and resist deformation under external forces.

[0017] The addition of bamboo pulp to viscose fiber further enhances its abrasion resistance, as bamboo pulp itself possesses good strength and abrasion resistance. Modifiers in viscose fiber, such as activated carbon and chitin nanofibers, increase the surface roughness of the fiber, raising the coefficient of friction between fibers and thus further enhancing the fabric's abrasion resistance. Chitin nanofibers possess excellent mechanical properties and biocompatibility, strengthening the bond between fibers and improving the overall strength of the fabric. Activated carbon has an adsorption effect, removing tiny particles from the fabric surface and reducing wear caused by dirt and these particles. Silane coupling agents improve the wettability and compatibility of the fiber surface, allowing for a tighter bond between fibers, thereby improving the fabric's stability and abrasion resistance. Simultaneously, silane coupling agents also improve the fiber's weather resistance and chemical stability, making the fabric more durable during use.

[0018] Furthermore, bamboo pulp and cotton fibers have longer fiber lengths and smoother surfaces, making them less prone to pilling. Simultaneously, the addition of modifiers improves the wettability and compatibility of the fiber surface, resulting in a tighter bond between fibers and reduced fiber shedding. Activated carbon has an adsorption effect, removing tiny particles from the fabric surface and reducing pilling and lint shedding. The combined use of bamboo pulp, cotton fibers, and modifiers further prevents pilling and lint shedding in double-layer yarns.

[0019] At the same time, both bamboo fiber and cotton fiber have good moisture absorption and breathability, which makes bamboo cotton plain double-layer gauze more comfortable to wear and can keep the skin dry and breathable.

[0020] Preferably, the weight ratio of the chitin nano whiskers, the activated carbon, and the silane coupling agent is (5-8):(2-4):0.5.

[0021] By adopting the above technical solutions and optimizing the dosage of chitin nano whiskers, activated carbon, and silane coupling agents, the strength, abrasion resistance, moisture absorption, breathability, softness, and comfort of viscose fibers can be further improved.

[0022] Preferably, the viscose fiber is prepared by the following method:

[0023] 1) Bamboo pulp is subjected to alkali impregnation, aging, yellowing, filtration and degassing to obtain bamboo mucilage;

[0024] 2) Mix bamboo slurry with viscose cellulose solution and modifier evenly, then spin, draw, refine and dry to obtain viscose fiber.

[0025] By employing the above technical solutions, the molecular structure of bamboo pulp is optimized and its fiber strength is improved after treatments such as alkali impregnation, aging, and xanthation. The mixing of viscose cellulose solution and bamboo mucilage allows the fibers to form a more compact structure during spinning, further enhancing fiber strength. The addition of chitin nanofibers enables the fibers to disperse stress and reduce wear when subjected to external forces. Simultaneously, the adsorption effect of activated carbon helps maintain the cleanliness of the fiber surface, reducing wear caused by dirt and microparticles.

[0026] Preferably, the viscose cellulose solution is prepared by the following method:

[0027] Cellulose acetate and polylactic acid were added to NaOH solution and stirred until completely dissolved to obtain viscose cellulose solution.

[0028] By employing the aforementioned technical solution, the dissolution process of cellulose acetate and polylactic acid in NaOH solution allows these two polymeric materials to be uniformly dispersed in the solution, forming a stable viscose cellulose solution. Simultaneously, the cellulose acetate and polylactic acid molecules in the viscose cellulose solution have relatively long chains and strong intermolecular forces, resulting in viscose fibers with high strength and toughness after spinning. High-strength fibers enhance the stability and abrasion resistance of the double-layer yarn, reducing deformation and wear, thus ensuring the fabric maintains its good condition over long-term use. Furthermore, both cellulose acetate and polylactic acid possess certain moisture absorption and breathability, enabling the viscose fiber to maintain high strength while also providing excellent comfort. Double-layer yarn made from this fiber keeps the skin dry and breathable during wear, improving comfort.

[0029] Preferably, the weight ratio of the cellulose acetate to the polylactic acid and the NaOH solution is 1:(2-3):(5-7).

[0030] By adopting the above technical solution and optimizing the weight of cellulose acetate, polylactic acid and NaOH solution, cellulose acetate and polylactic acid dissolve faster, and the polymer chains in the viscose cellulose solution can form strong interaction forces, so that the viscose fiber obtained after spinning has high strength and toughness, and can maintain good morphological stability and wear resistance during subsequent processing and use.

[0031] Preferably, the degree of polymerization of the polylactic acid is 500-2000.

[0032] By adopting the above technical solution, the degree of polymerization of polylactic acid is optimized to achieve a moderate molecular chain length, forming a relatively stable solution structure. This ensures that the viscose cellulose solution has a suitable viscosity during preparation—neither too viscous to affect flowability nor too thin to affect spinning. Simultaneously, this promotes fiber uniformity and continuity during subsequent spinning, improving fiber quality. Furthermore, within this range, polylactic acid can form a strong molecular chain structure, working synergistically with cellulose acetate to enhance the strength and toughness of viscose fibers, enabling them to maintain good morphological stability and abrasion resistance during subsequent processing and use.

[0033] Preferably, the degree of polymerization of the cellulose acetate is 300-1500.

[0034] By adopting the above technical solution, the degree of polymerization of cellulose acetate is optimized, resulting in a moderate molecular chain length that forms a relatively stable solution structure, ensuring the homogeneity of the viscose cellulose solution. Furthermore, within this range, cellulose acetate can form a strong molecular chain structure, which, together with polylactic acid, improves the strength and toughness of viscose fibers, making the double-sided yarn more stable under external forces and less prone to deformation or wear.

[0035] Preferably, the cotton fibers include microfiber cotton and / or long-staple cotton.

[0036] By adopting the above technical solutions and optimizing the type of cotton fibers, the fabric's texture, durability, softness, and comfort are further improved. The addition of fine cotton enhances the overall strength of the fabric, making the yarn more durable. Long-staple cotton fibers, being longer, form a tighter and stronger yarn structure, further improving the fabric's strength and toughness. Simultaneously, the relatively uniform fibers of both fine and long-staple cotton result in a smooth fabric surface without significant unevenness in thickness, contributing to a more refined and delicate overall aesthetic appeal of the double-layered yarn.

[0037] Preferably, the average particle size of the activated carbon is 50-300 nm.

[0038] By adopting the above technical solution, the average particle size of activated carbon is optimized to fill the gaps between fibers, increasing the bonding force between fibers, thereby improving the overall stability of the fabric and preventing pilling or deformation of double-layer yarn during use.

[0039] Secondly, this application provides a method for preparing bamboo-cotton plain weave double-layer gauze, which adopts the following technical solution: A method for preparing bamboo-cotton plain weave double-layer gauze includes the following preparation steps:

[0040] S1. Cotton fibers and viscose fibers are processed through opening and cleaning, carding, drawing, roving and spinning processes, and then spun to obtain blended yarn;

[0041] S2. The mixed yarn is used to make double-layer yarn on a loom to obtain bamboo cotton plain weave double-layer gauze.

[0042] By employing the aforementioned technical solution, cotton and viscose fibers are thoroughly mixed and evenly distributed within the yarn, resulting in a denser yarn structure and improved overall strength and stability of the fabric. Simultaneously, the uniformity of the blended yarn helps reduce fabric deformation and damage during use, thus extending its lifespan. The addition of viscose fibers and the subsequent double-layer yarn manufacturing process enhance the fabric's abrasion resistance. Viscose fibers themselves possess a certain degree of abrasion resistance, while the double-layer structure further strengthens the fabric's resistance to wear. Cotton fibers have excellent moisture absorption and breathability, allowing the bamboo cotton plain weave double-layer gauze to maintain high performance while still offering exceptional wearing comfort. Whether used in summer clothing or bedding, it provides users with a refreshing wearing experience.

[0043] In summary, this application has the following beneficial effects:

[0044] 1. By introducing a specific ratio of cotton and viscose fibers, the overall structure of the double-layer yarn is strengthened, enhancing its tear resistance and thus improving its stability, durability, and abrasion resistance. Simultaneously, the addition of modifiers improves the bonding force between fibers, reducing fabric damage caused by friction during use. Chitosan nanofibers in the modifiers enhance fiber strength and abrasion resistance; activated carbon, due to its porous structure, possesses excellent adsorption properties, helping to remove odors and keep the fabric fresh; silane coupling agents act as bridges, tightly binding inorganic particles such as chitosan nanofibers and activated carbon with organic fibers, thereby improving the overall fiber performance. The addition of cotton fibers ensures the fabric maintains good moisture absorption and breathability, while bamboo pulp also has certain moisture absorption and release properties, allowing the fabric to maintain high performance while still providing excellent wearing comfort. Detailed Implementation

[0045] Example

[0046] Example 1

[0047] A type of bamboo-cotton plain-weave double-layer gauze is prepared by the following method:

[0048] S1. 2.5Kg of cotton fiber and 7.5Kg of viscose fiber are processed through opening and cleaning, carding, drawing, roving and spinning processes, and then spun to obtain blended yarn;

[0049] S2. The mixed yarn is used to make double-layer yarn on a loom to obtain bamboo cotton plain weave double-layer gauze.

[0050] The cotton fiber is fine cotton.

[0051] Viscose fibers are prepared by the following methods:

[0052] 1) 4 kg of bamboo pulp residue was subjected to alkali impregnation, aging, yellowing, filtration and degassing to obtain bamboo mucilage;

[0053] 2) Mix bamboo slurry with 3 kg of viscose cellulose solution and 0.5 kg of modifier evenly, then spin, draw, refine and dry to obtain viscose fiber.

[0054] The modifier is prepared by mixing chitin nano whiskers, activated carbon (average particle size of 201-300 nm), and silane coupling agent (vinyltriethoxysilane) in a weight ratio of 5:2:0.5.

[0055] The viscose cellulose solution was prepared by the following method:

[0056] Add 1 kg of cellulose acetate and 2 kg of polylactic acid to 5 kg of NaOH solution (mass fraction of 10%) and stir until completely dissolved to obtain a viscose cellulose solution.

[0057] The degree of polymerization of polylactic acid is 500.

[0058] The degree of polymerization of cellulose acetate is 300.

[0059] Example 2

[0060] A type of bamboo-cotton plain-weave double-layer gauze is prepared by the following method:

[0061] S1. 3 kg of cotton fiber and 7 kg of viscose fiber are processed through opening and cleaning, carding, drawing, roving and spinning processes, and then spun to obtain blended yarn;

[0062] S2. The mixed yarn is used to make double-layer yarn on a loom to obtain bamboo cotton plain weave double-layer gauze.

[0063] The cotton fiber is long-staple cotton.

[0064] Viscose fibers are prepared by the following methods:

[0065] 1) Bamboo pulp residue (5 kg) was subjected to alkali impregnation, aging, yellowing, filtration and degassing to obtain bamboo mucilage;

[0066] 2) Mix bamboo slurry with 2.4 kg of viscose cellulose solution and 0.6 kg of modifier evenly, then spin, draw, refine and dry to obtain viscose fiber.

[0067] The modifier is prepared by mixing chitin nano whiskers, activated carbon (average particle size of 50-100nm) and silane coupling agent (vinyltris(β-methoxyethoxy)silane) in a weight ratio of 6:3:0.5.

[0068] The viscose cellulose solution was prepared by the following method:

[0069] 1 kg of cellulose acetate and 2.5 kg of polylactic acid were added to 6 kg of NaOH solution (mass fraction 12%) and stirred until completely dissolved to obtain a viscose cellulose solution.

[0070] The degree of polymerization of polylactic acid is 1200.

[0071] The degree of polymerization of cellulose acetate is 1000.

[0072] Example 3

[0073] A type of bamboo-cotton plain-weave double-layer gauze is prepared by the following method:

[0074] S1. 3.5Kg of cotton fiber and 6.5Kg of viscose fiber are processed through opening and cleaning, carding, drawing, roving and spinning processes, and then spun to obtain blended yarn;

[0075] S2. The mixed yarn is used to make double-layer yarn on a loom to obtain bamboo cotton plain weave double-layer gauze.

[0076] The cotton fibers are fine-staple cotton and long-staple cotton, with a weight ratio of 1:1.

[0077] Viscose fibers are prepared by the following methods:

[0078] 1) 6 kg of bamboo pulp residue was subjected to alkali impregnation, aging, yellowing, filtration and degassing to obtain bamboo mucilage;

[0079] 2) Mix bamboo slurry with 2 kg of viscose cellulose solution and 0.5 kg of modifier evenly, then spin, draw, refine and dry to obtain viscose fiber.

[0080] The modifier is prepared by mixing chitin nano whiskers, activated carbon (average particle size of 101-200 nm), and silane coupling agent (γ-mercaptopropyltriethoxysilane) in a weight ratio of 8:4:0.5.

[0081] The viscose cellulose solution was prepared by the following method:

[0082] 1 kg of cellulose acetate and 3 kg of polylactic acid were added to 7 kg of NaOH solution (mass fraction 15%) and stirred until completely dissolved to obtain a viscose cellulose solution.

[0083] The degree of polymerization of polylactic acid is 2000.

[0084] The degree of polymerization of cellulose acetate is 1500.

[0085] Example 4

[0086] A bamboo-cotton plain-weave double-layer gauze, the difference between this embodiment and Example 1 is that the viscose cellulose solution is prepared by the following method:

[0087] Add 1 kg of cellulose acetate to 5 kg of NaOH solution (mass fraction 10%) and stir until completely dissolved to obtain viscose cellulose solution.

[0088] Example 5

[0089] A bamboo-cotton plain-weave double-layer gauze, the difference between this embodiment and Example 1 is that the viscose cellulose solution is prepared by the following method:

[0090] Add 2.5 kg of polylactic acid to 5 kg of NaOH solution (mass fraction of 10%) and stir until completely dissolved to obtain a viscose cellulose solution.

[0091] Example 6

[0092] A bamboo-cotton plain-weave double-layer gauze, the difference between this embodiment and Example 1 is that the viscose cellulose solution is prepared by the following method:

[0093] Add 1 kg of cellulose carbamate and 2.5 kg of polylactic acid to 5 kg of NaOH solution (mass fraction of 10%) and stir until completely dissolved to obtain viscose cellulose solution.

[0094] Example 7

[0095] A bamboo cotton plain weave double-layer gauze, the difference between this embodiment and embodiment 1 is that the weight ratio of chitin nano whiskers, activated carbon and silane coupling agent (vinyltriethoxysilane) is 5:5:0.5.

[0096] Example 8

[0097] A bamboo cotton plain weave double-layer gauze, the difference between this embodiment and embodiment 1 is that the degree of polymerization of polylactic acid is 2500.

[0098] Example 9

[0099] A bamboo cotton plain weave double-layer gauze, the difference between this embodiment and Example 1 is that the degree of polymerization of cellulose acetate is 1600.

[0100] Comparative Example

[0101] Comparative Example 1

[0102] A bamboo cotton plain weave double-layer gauze, the difference between this comparative example and Example 1 is that the modifier is chitosan nano whiskers.

[0103] Comparative Example 2

[0104] A bamboo cotton plain weave double-layer gauze, the difference between this comparative example and Example 1 is that the modifier is activated carbon.

[0105] Comparative Example 3

[0106] A bamboo cotton plain weave double-layer gauze, the difference between this comparative example and Example 1 is that zinc oxide whiskers are used instead of chitin nano whiskers.

[0107] Comparative Example 4

[0108] A bamboo cotton plain weave double-layer gauze, the difference between this comparative example and Example 1 is that nano-silica is used instead of activated carbon.

[0109] Comparative Example 5

[0110] A bamboo cotton plain weave double-layer gauze, the difference between this comparative example and Example 1 is that talc powder is used instead of silane coupling agent.

[0111] Comparative Example 6

[0112] A bamboo-cotton plain weave double-layer gauze, the difference between this comparative example and Example 1 is that cotton pulp is used instead of bamboo pulp.

[0113] Test Method / Test Procedure: Strength Test: Tensile mechanical properties are determined according to GB / T3923.1-2013 "Textiles - Tensile Properties of Fabrics - Part 1: Determination of Breaking Strength and Elongation at Break (Strip Method)". Experimental Procedure: Cut rectangular specimens with dimensions of 200mm × 60mm. Tensile speed is 300mm / min, and the clamping distance is 50mm. During the tensile test, the tensile testing machine records the tensile force and elongation of the specimen in real time. After the test, the breaking strength is calculated based on the test results.

[0114] Pilling test: Cut bamboo cotton plain weave double-layer gauze into circles with a diameter of 100cm, and use a disc fabric abrasion tester to conduct a friction test. The weight of the hammer is 500g. Rub until the bamboo cotton plain weave double-layer gauze pills or breaks, and record the number of pilling cycles.

[0115] Softness test: Tested using a fabric style tester, Grade IV and Grade I have the best softness.

[0116] Wrinkle resistance test: Prepare 20 containers of the same size. Place the bamboo cotton plain weave double-layer gauze obtained in the examples and comparative examples into the containers, let them stand for 24 hours, remove them, and observe whether the bamboo cotton plain weave double-layer gauze has wrinkles. The experimental results are shown in Table 1:

[0117] Table 1. Experimental data of Examples 1-9 and Comparative Examples 1-6

[0118]

[0119]

[0120] Comparing Example 1 and Comparative Example 1, the fracture strength and number of breakage rings in Comparative Example 1 are both greater than those in Example 1, but its softness grade is lower than that in Example 1. Example 1 has better softness.

[0121] Compared with Example 1, Comparative Example 2 showed that the fracture strength of Comparative Example 2 was lower than that of Example 1, it was prone to pilling, and wrinkles appeared in the wrinkle resistance test.

[0122] Compared with Example 1, Comparative Example 3 shows that the breaking strength of Comparative Example 2 is lower than that of Example 1, it pills, the softness level is lower than that of Example 1, and wrinkles appear in the wrinkle resistance test.

[0123] Comparing Example 1 and Comparative Example 4, the fracture strength and number of breakage rings in Comparative Example 4 are both greater than those in Example 1, but its softness grade is lower than that in Example 1. Example 1 has better softness.

[0124] Compared with Example 1, Comparative Example 5 showed that the breaking strength of Comparative Example 5 was less than that of Example 1, the number of broken rings was less than that of Example 1, the softness grade was less than that of Example 1, and wrinkles appeared in the wrinkle resistance test.

[0125] The experimental data from Example 1 and Comparative Examples 1-5 show that by using chitin nano whiskers, activated carbon, and silane coupling agents to prepare a modifier, the breaking strength, abrasion resistance, softness, and wrinkle resistance of double-layer yarn can be effectively improved, while preventing pilling of double-layer yarn.

[0126] Compared with Example 1, Comparative Example 6 showed that the breaking strength of Comparative Example 6 was lower than that of Example 1, pilling occurred, the softness level was lower than that of Example 1, and wrinkles appeared in the wrinkle resistance test. This indicates that by using bamboo pulp pulp and viscose cellulose solution and modifier to prepare viscose fiber, the breaking strength, abrasion resistance, softness and wrinkle resistance of double-layer yarn can be improved, while preventing pilling of double-layer yarn.

[0127] Comparing Examples 1 and Examples 4-6, the breaking strength and number of broken rings of Examples 4-6 are both less than those of Example 1, and the softness grade of Examples 5-6 is less than that of Example 1. This indicates that the viscose fiber prepared by the specific formulation of this application can improve the breaking strength, abrasion resistance and softness of the double-layer yarn.

[0128] Comparing Example 1 and Example 7, the breaking strength and number of broken rings of Example 7 are both less than those of Example 1, indicating that rationally optimizing the dosage of chitin nano whiskers, activated carbon and silane coupling agent is beneficial to improving the breaking strength and abrasion resistance of double-layer yarn.

[0129] Comparing Examples 1 and 8-9, the breaking strength and number of broken rings of Example 7 are slightly greater than those of Example 1. However, the softness grade of Examples 8-9 is lower than that of Example 1, indicating that optimizing the degree of polymerization of polylactic acid and cellulose acetate is beneficial to improving the softness of the double-layer yarn.

[0130] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A bamboo cotton plain double gauze, characterized in that, Prepared from the following raw materials by weight percentage: Cotton fiber 25-35% Viscose fiber 65-75%; The viscose fiber is prepared from the following weight parts: Bamboo pulp pulp 20-30 parts Viscose cellulose solution 10-15 parts Modifier 5-8 parts The modifier is obtained by mixing chitin nanowhiskers, activated carbon and silane coupling agent; The weight ratio of the chitin nanowhiskers, the activated carbon and the silane coupling agent is (5-8):(2-4):0.5; The viscose fiber is prepared by the following method: 1) The bamboo pulp pulp is subjected to alkali impregnation treatment, aging treatment, yellowing treatment, filtration and defoaming to obtain bamboo viscous liquid; 2) The bamboo viscous liquid is uniformly mixed with viscose cellulose solution and modifier, and then subjected to spinning, drawing, refining and drying to obtain viscose fiber; The viscose cellulose solution is prepared by the following method: Cellulose acetate and polylactic acid are added to NaOH solution, stirred until completely dissolved, to obtain viscose cellulose solution; The weight ratio of the cellulose acetate, the polylactic acid and the NaOH solution is 1:(2-3):(5-7).

2. A bamboo and cotton single jersey double-layer gauze according to claim 1, characterized in that: The degree of polymerization of the polylactic acid is 500-2000.

3. A bamboo and cotton single jersey double-layer gauze fabric according to claim 1, characterized in that: The degree of polymerization of the cellulose acetate is 300-1500.

4. A bamboo and cotton single jersey double-layer gauze fabric according to claim 1, characterized in that: The cotton fiber includes fine cotton or / and long cotton.

5. The bamboo and cotton single jersey double-layer gauze according to claim 1, characterized in that: The average particle size of the activated carbon is 50-300 nm.

6. A process for the preparation of bamboo and cotton plain double gauze according to any one of claims 1 to 5, characterized in that, The following preparation steps are included: S1, the cotton fiber and the viscose fiber are subjected to opening and cleaning process, carding process, drawing process, roving process and spinning process, and then spun to obtain mixed yarn; S2, the mixed yarn is subjected to double-layer yarn manufacturing by a weaving machine to obtain bamboo cotton plain double-layer gauze.

Images