Pure cotton fabric made with water-absorbing and quick-drying cotton yarn.

Abstract

We provide pure cotton fabric made from water-absorbing and quick-drying cotton yarn. [Solution] The pure cotton fabric is made by feeding water-absorbing and quick-drying cotton yarn 1 in the weft direction, bending each one to form a series of loops, and intertwining the newly generated loops with previously formed old loops. The water-absorbing and quick-drying cotton yarn includes modified cotton fibers and unmodified cotton fibers, where the mass of the modified cotton fibers accounts for 30% to 80% of the total mass of the water-absorbing and quick-drying cotton yarn. The pure cotton fabric of the water-absorbing and quick-drying cotton yarn of this invention is manufactured from water-absorbing and quick-drying cotton yarn that is interwoven with each other. The water-absorbing and quick-drying cotton yarn includes modified cotton fibers and unmodified cotton fibers. In a single cotton yarn, not only is the inherent hydrophilicity of the cotton fibers maintained, but a mixture of some modified cotton fibers is also present. This ensures that the yarn has a certain level of hydrophilicity and water-conducting performance, and the overall water retention and absorption rate of the yarn can be reduced, thereby improving the quick-drying performance of the pure cotton yarn, and thus the quick-drying cotton fabric can be given superior quick-drying performance.

Description

Technical Field

[0001] The present invention relates to the field of fabric technology, and specifically to a pure cotton fabric of water-absorbing and quick-drying cotton yarn.

Background Art

[0002] Due to its excellent touch, breathability and hygroscopicity, pure cotton fabric is widely applied to clothing, household textiles and the like. However, after absorbing sweat or coming into contact with water, a large amount of moisture is absorbed and accumulated inside the fibers of conventional pure cotton fabric, resulting in a high water retention rate of the fabric and a slow drying speed. Therefore, when worn, it is easy to feel cold and discomfort. Especially in scenes that require rapid moisture discharge such as sportswear, underwear, towels, etc., the performance is not good.

[0003] In the existing technology, usually, the following methods are adopted to improve the quick-drying performance of the fabric.

[0004] The first one is to blend hydrophobic chemical fibers such as polyester and nylon with cotton, and utilize the low water absorption of chemical fibers to accelerate the volatilization of moisture. The second one is to perform post-processing of hydrophilic quick-drying on cotton fibers or fabrics, for example, by coating or padding with functional auxiliaries to give the surface a moisture induction and quick-drying effect.

[0005] However, in the first method, the natural good touch and hygroscopicity of the fabric are reduced, and the addition of chemical fibers may affect the degradability and environmental compatibility of the fabric. In the second method, there is a problem of insufficient durability. After multiple washings, the processing effect attenuates or even disappears, and the quick-drying function cannot be maintained for a long time.

[0006] Therefore, how to endow pure cotton fabric with a sustainable and effective water-absorbing and quick-drying performance without relying on chemical fibers and without impairing the natural properties of cotton fibers has become an urgent technical problem to be solved in this field.

Summary of the Invention

Problems to be Solved by the Invention

[0007] The technical problem that this invention aims to solve is to resolve the above-mentioned technical defects and provide a pure cotton fabric made of water-absorbing, quick-drying cotton yarn. [Means for solving the problem]

[0008] To solve the above technical problems, the technical solution provided in this invention is a pure cotton fabric made of water-absorbing, quick-drying cotton yarn, which is made by feeding the water-absorbing, quick-drying cotton yarn in the weft direction, bending it one by one to form a series of loops, and intertwining the newly generated loops with the previously formed old loops, wherein the water-absorbing, quick-drying cotton yarn includes modified cotton fibers and unmodified cotton fibers, where the mass of the modified cotton fibers accounts for 30% to 80% of the total mass of the water-absorbing, quick-drying cotton yarn.

[0009] As an improvement, when the water-absorbing and quick-drying cotton yarn is a single yarn, the water-absorbing and quick-drying cotton yarn also includes blended yarns, and the modified cotton fibers and unmodified cotton fibers are uniformly arranged in the blended yarn, thereby ensuring that there are a large number of water-absorbing points in the water-absorbing and quick-drying cotton yarn as well as modified fibers, thereby reducing the overall water retention rate of the water-absorbing and quick-drying cotton yarn.

[0010] As an improvement, the modified cotton fibers and the unmodified cotton fibers are uniformly arranged on the surface of the blended yarn or inside the blended yarn.

[0011] As an improvement, if the water-absorbing and quick-drying cotton yarn is a silospun yarn, the water-absorbing and quick-drying cotton yarn has a false-twist structure formed by twisting together a roving of modified cotton fibers and a roving of unmodified cotton fibers.

[0012] As an improvement, the diameters of the modified cotton fibers and the unmodified cotton fibers are the same. [Effects of the Invention]

[0013] Compared to existing technologies, the advantages of this invention are as follows:

[0014] The pure cotton fabric of the water-absorbing, quick-drying cotton yarn of this invention is made by feeding the water-absorbing, quick-drying cotton yarn in the weft direction, bending each strand to form a series of loops, and intertwining the newly formed loops with the previously formed old loops. The water-absorbing, quick-drying cotton yarn contains modified cotton fibers and unmodified cotton fibers, and each cotton yarn not only maintains the inherent hydrophilicity of the cotton fibers but also contains a mixture of some modified cotton fibers. This ensures that the yarn has a certain level of hydrophilicity and water-conducting performance, while also reducing the overall water retention and absorption rate of the yarn, thereby improving the quick-drying performance of the pure cotton yarn. As a result, the pure cotton fabric of the water-absorbing, quick-drying cotton yarn has better quick-drying performance and excellent durability of its quick-drying function. [Brief explanation of the drawing]

[0015] [Figure 1] This is a schematic diagram of the pure cotton fabric made of water-absorbing and quick-drying cotton yarn according to the present invention. [Figure 2] This is a schematic diagram of the water-absorbing, quick-drying cotton yarn of Example 1 of the pure cotton fabric of the water-absorbing, quick-drying cotton yarn according to the present invention. [Figure 3] This is a schematic diagram of the water-absorbing, quick-drying cotton yarn of Example 2 of the pure cotton fabric of the water-absorbing, quick-drying cotton yarn according to the present invention. [Figure 4] This is a scanning electron microscope image of unmodified cotton fibers of a pure cotton fabric made from water-absorbing, quick-drying cotton yarn according to the present invention, magnified 400 times. [Figure 5] This is a scanning electron microscope image of the modified cotton fibers of the pure cotton fabric made from water-absorbing and quick-drying cotton yarn according to the present invention, magnified 400 times. [Figure 6] This is the reaction equation for the modification of a pure cotton fabric using water-absorbing, quick-drying cotton yarn according to the present invention, using a polyvalent carboxylic acid. [Modes for carrying out the invention]

[0016] In the following section, the pure cotton fabric of the water-absorbing and quick-drying cotton yarn according to the present invention will be described in more detail with reference to the drawings.

[0017] Referring to FIGS. 1 to 6, it is a pure cotton fabric of water-absorbing and quick-drying cotton yarn. The pure cotton fabric is made by feeding the water-absorbing and quick-drying cotton yarn 1 in the weft direction, bending it one by one to form a series of loops, and intertwining the newly generated loops with the previously formed old loops. The water-absorbing and quick-drying cotton yarn 1 includes modified cotton fibers 3 and unmodified cotton fibers 2. Here, the mass of the modified cotton fibers accounts for 30% to 80% of the total mass of the water-absorbing and quick-drying cotton yarn 1. Here, the diameters of the modified cotton fibers 3 and the unmodified cotton fibers 2 are the same. (Example 1)

[0018] When the water-absorbing and quick-drying cotton yarn 1 is a single yarn, the water-absorbing and quick-drying cotton yarn 1 also includes blended yarns. The modified cotton fibers 3 and the unmodified cotton fibers 2 are uniformly arranged in the blended yarns, so that there are a large number of water-absorbing points in the water-absorbing and quick-drying cotton yarn 1 and modified fibers also exist, thereby reducing the overall water retention rate of the water-absorbing and quick-drying cotton yarn 1.

[0019] The modified cotton fibers 3 and the unmodified cotton fibers 2 are uniformly arranged on the surface or inside of the blended yarns.

[0020] This method uniformly mixes and spins into single yarns to uniformly distribute the modified fibers, thereby controlling the overall performance of the yarn. Such a structure gives high flexibility in product development and can optimize the performance ratio according to the end-use. After the fabric made of such water-absorbing and quick-drying cotton yarn 1 absorbs moisture, the moisture can rapidly migrate from the gaps inside and between the yarns to the surface of the fabric due to the capillary effect, and since the overall water retention rate decreases, the moisture is more likely to evaporate, thereby achieving a balance between water absorption and quick drying. (Example 2)

[0021] When the water-absorbing and quick-drying cotton yarn 1 is a siro-spun yarn, the water-absorbing and quick-drying cotton yarn 1 has a false twist structure formed by twisting together the thick yarn of the modified cotton fibers 3 and the thick yarn of the unmodified cotton fibers 2.

[0022] Using the siro spinning technology, two rovings, namely the roving of the modified cotton fiber 3 and the roving of the unmodified cotton fiber 2, are fed parallelly into a ring spinning frame at a certain interval. After passing through drafting, they are sent out from the front roller. The two rovings are intertwined with each other under the twisting action to form a single yarn with a "false twist line" structure from the combined twist.

[0023] In the sirospan yarn structure, after the roving of the modified cotton fiber 3 and the roving of the unmodified cotton fiber 2 are twisted together, two clearly intertwined fiber bundle regions are formed in the water-absorbent and quick-drying cotton yarn 1. The region of the unmodified cotton fiber 2 bundle mainly plays the role of rapid water absorption, and the region of the modified cotton fiber 3 bundle plays the role of supporting the skeleton, reducing the overall water retention rate, and promoting the transmission of moisture along the axial direction of the yarn. The two components have a stable spatial distribution in the yarn and are firmly bonded.

[0024] The fabric woven with the water-absorbent and quick-drying sirospan yarn not only has the characteristics of water absorption and quick drying, but also the sirospan yarn has a tight structure and less hairiness, so the surface of the fabric is smooth, the touch is smoother, and it also has excellent quick-drying performance and durability.

[0025] Here, the diameters of the roving of the modified cotton fiber 3 and the roving of the unmodified cotton fiber 2 are the same.

[0026] When the present invention is specifically implemented, The siro spinning and high-temperature short-time baking processes are adopted. Through the sirospan yarn structure and the strengthening baking process, a pure cotton fabric of the water-absorbent and quick-drying cotton yarn 1 with more remarkable moisture induction and extremely excellent washing resistance is obtained.

[0027] Step 1: Pretreatment of cotton fiber Take 50 kg of loose fibers of long-staple cotton and strengthen them under the conditions of the pretreatment liquid (treated with 4 g / L of sodium hydroxide, 4.5 g / L of scouring agent at 100 °C for 35 minutes, washed with water until neutral and dehydrated). The purpose of stronger pretreatment is to obtain a cleaner fiber surface, which is beneficial for subsequent high-load modification.

[0028] Step 2: Graft modification Preparation of the modification solution: The polycarboxylic acid was a mixture of citric acid and butanetetracarboxylic acid (mass ratio 1:1), with a total amount used of 9% owf of the fiber weight, a catalyst SHP amount of 4.5% owf, a softener (polyurethane-based) concentration of 25 g / L, and a yellowing inhibitor of 0.9%. The pH was adjusted to 4.0 with citric acid, and the solution was immersed for 50 minutes at 20°C with a bath ratio of 1:50. The modification reaction equation for the polycarboxylic acid is shown in Figure 6.

[0029] Step 3: Dehydration and drying After dehydration, the liquid content is controlled to 70% and monitored using an online infrared moisture meter (e.g., MoistTech IR-3000) to ensure consistency. For baking, a high-temperature, short-time process is employed, which involves processing at 180°C for 60 seconds. The purpose of these conditions is to achieve rapid and deep crosslinking to maximize the durability of the function.

[0030] Step 4: Spinning Using silo spinning technology, modified cotton fibers and unmodified cotton fibers are processed into rovings independently. In a modified spinning machine, the two rovings are fed in parallel in a mass ratio of 45:55 (modified fibers account for 45% of the total mass of the yarn), and spun into a silo-spun yarn with a yarn density of 21 tex and a twist coefficient of 370, forming a water-absorbing, quick-drying cotton yarn 1 with a false-twist structure that has potential "inner hydrophilicity and outer moisture-inducing properties".

[0031] Step 5: Fabric weaving and finishing Step 4 involves feeding the water-absorbing, quick-drying cotton yarn 1 in the weft direction, bending it one by one to form a series of loops, and intertwining the newly generated loops with the previously formed old loops to produce a pure cotton fabric with a basis weight of 160 g / m². 2The knit jersey fabric is woven, and to stabilize the yarn structure and improve the feel, a loosening step with 95°C steam is added in the post-processing. After bleaching and dyeing, a hydrophilic post-processing is performed, and padding is done with a working solution containing 2.5% hydrophilic softener, with a squeeze residue rate of 70%. It is then molded and dried at 115°C, and the finished fabric has a water absorption time of 2.5s and a quick-drying time of 56.5 minutes. Even after 10 washes, the quick-drying time only increases to 57.8 minutes, with a change rate of approximately +2.3%, demonstrating extremely excellent durability.

[0032] In summary, the operating principles described above are as follows:

[0033] In terms of the water-absorbing, quick-drying cotton yarn 1, the core is the combination of the modified fibers mentioned above with unmodified cotton fibers that completely maintain high hydrophilicity. This is not a simple physical mixing, but rather the establishment of a functional structure. When a uniform blend is used, the two types of fibers with different functions intertwine and interlock within the cross-section of the yarn, forming a dense "microcirculation system" dispersed throughout the water-absorbing, quick-drying cotton yarn 1. The unmodified fibers act as efficient "capillaries" to rapidly absorb liquid, while the adjacent modified fibers act as "water conduits" to rapidly transport the collected moisture to the outside along the axial direction of the fiber.

[0034] When using silo spinning, a more macroscopic radial gradient structure can be constructed, and by intentionally separating the moisture-absorbing core and the moisture-inducing sheath, a directional "pump transport" of moisture from the inner layer to the outer layer can be achieved. This internal structure design of water-absorbing and quick-drying cotton yarn 1, based on the differentiation of fiber functions, is key to achieving efficient moisture management in pure cotton systems.

[0035] In terms of fabric and performance, the moisture management performance of fabrics woven with this type of functional water-absorbing and quick-drying cotton yarn 1 is due to the integration and expression of the yarn's function, and the basic wettability of the fabric is confirmed by pretreatment. The final hydrophilic post-processing further optimizes the interfacial properties of the fiber / yarn surface, reduces the surface tension of moisture, allows moisture to diffuse rapidly on the surface of the fabric, and maximizes the evaporation area.

[0036] Therefore, from the moment a water droplet contacts the fabric until it completely evaporates, an efficient cooperative process is completed involving "rapid adsorption to the surface, transfiber transfer from unmodified fibers to modified fibers within the water-absorbing and quick-drying cotton yarn 1, rapid diffusion along the axial direction of the modified fibers and the gaps between the fibers, and large-area evaporation on the fabric surface." The limited but excellent performance indicators (water absorption ≤ 5 seconds, quick drying ≤ 70 minutes, low rate of change in wash resistance) are direct evidence of this multi-scale cooperative operating mechanism.

[0037] In summary, this invention successfully constructs a stable, durable, and efficient integrated pathway for moisture absorption, conduction, and evaporation within a 100% pure cotton system by performing precise and environmentally friendly modifications from the very foundations of fiber chemistry and designing the spatial arrangement of fibers in combination with spinning technology. This fundamentally overcomes the technical bottlenecks of conventional pure cotton fabrics, such as poor quick-drying properties, conventional modification technologies being either unenvironmentally unfriendly or lacking durability, and blends compromising the texture of cotton.

[0038] Furthermore, in the descriptions of embodiments of this invention, directions or positional relationships indicated by terms such as "center," "up," "down," "left," "right," "vertical," "horizontal," "inside," and "outside" are either directions or positional relationships based on those shown in the drawings, or directions or positional relationships in which the product of this invention is normally placed when in use. These terms are merely for the purpose of facilitating the description of this invention and simplifying the description, and do not indicate or imply that the described device or component necessarily has a specific direction or is configured or operated in a specific direction. Therefore, they cannot be understood as limiting this invention. In addition, the terms "first" and "second" are used solely for descriptive purposes and cannot be understood as indicating or suggesting relative importance.

[0039] Furthermore, when terms such as "horizontal," "vertical," and "suspended" appear, they do not require that the members be absolutely horizontal or suspended, but rather that they may be slightly inclined. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not indicate that the structure must be perfectly horizontal, but may be slightly inclined.

[0040] In the description of the embodiments of this invention, "multiple" means at least two.

[0041] In the description of the embodiments of this invention, unless specifically defined and limited, terms such as "setting," "attaching," "connecting," and "linking" should be understood in a broad sense. For example, a connection may be fixed, detachable, or integral; it may be mechanical or electrical; it may be directly connected, indirectly connected via an intermediate medium, or internal communication between two elements. Those skilled in the art will be able to understand the specific meaning of the above terms in this invention according to the specific situation.

[0042] The above describes the present invention and its embodiments, but this description is not limiting, and what is shown in the drawings is only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art, inspired by the present invention, designs a structural method and embodiment similar to the technical solution without departing from the spirit of the invention and without creative work, such a design should fall within the scope of protection of the present invention. [Explanation of Symbols]

[0043] 1…Water-absorbing, quick-drying cotton yarn, 2…Unmodified cotton fibers, 3…Modified cotton fiber.

Claims

1. The water-absorbing, quick-drying cotton yarn is fed in the weft direction, bent one by one to form a series of loops, and the newly generated loops are intertwined with the previously formed old loops, and the water-absorbing, quick-drying cotton yarn includes modified cotton fibers and unmodified cotton fibers, where the mass of the modified cotton fibers accounts for 30% to 80% of the total mass of the water-absorbing, quick-drying cotton yarn. A pure cotton fabric made from water-absorbing, quick-drying cotton yarn.

2. When the water-absorbing, quick-drying cotton yarn is a single yarn, the water-absorbing, quick-drying cotton yarn also includes blended yarns, and the modified cotton fibers and unmodified cotton fibers are uniformly arranged in the blended yarn, thereby ensuring that a large number of water-absorbing points exist in the water-absorbing, quick-drying cotton yarn, as well as the presence of modified fibers, and thereby reducing the overall water retention rate of the water-absorbing, quick-drying cotton yarn. A pure cotton fabric made of water-absorbing, quick-drying cotton yarn as described in feature 1.

3. The modified cotton fibers and the unmodified cotton fibers are uniformly arranged on the surface of the blended yarn or inside the blended yarn. The pure cotton fabric of the water-absorbing and quick-drying cotton yarn as described in feature 2.

4. When the water-absorbing, quick-drying cotton yarn is Sirospun yarn, the water-absorbing, quick-drying cotton yarn has a false-twist structure formed by twisting together a roving of modified cotton fibers and a roving of unmodified cotton fibers. A pure cotton fabric made of water-absorbing, quick-drying cotton yarn as described in feature 1.

5. The diameters of the modified cotton fibers and the unmodified cotton fibers are the same. A pure cotton fabric made of water-absorbing, quick-drying cotton yarn as described in any one of claims 1 to 4.

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