A warm and antibacterial blended fabric and a preparation method thereof

Abstract

The application discloses a kind of warm antibacterial blended fabric and preparation method thereof, belong to functional textile technical field.The fabric is three-layer composite structure, including: by high-density synthetic fiber filament weaving and form outer layer, by silver ion antibacterial fiber and filament cotton blending and form intermediate layer and by hollow warm fiber constitute inner layer.Its preparation method includes weaving, pre-setting, subsection temperature dyeing, intermediate setting drying and post-finishing antibacterial processing and the like steps.The application is through " sandwich " structure design and the optimization combination of functional fiber, and cooperates specific post-finishing process, realizes the synergistic significant promotion of fabric warm and antibacterial function.Testing, the warm rate of fabric is increased by more than 30%, and the cro value is greater than or equal to 1.5, the antibacterial rate of escherichia coli and staphylococcus aureus is greater than or equal to 99%, and it is washed more than 50 times, while having excellent wearing comfort.

Description

Technical Field

[0001] This invention relates to the technical field of functional textiles, and more specifically, to a blended fabric that combines high-efficiency warmth retention and long-lasting antibacterial properties, as well as a method for preparing the fabric. Background Technology

[0002] Functional textiles refer to fabrics that are endowed with specific functions (such as waterproofing, windproofing, antibacterial properties, and warmth retention) through special processing or composite technologies. In recent years, with the increasing health awareness, environmental protection concepts, and demands for wearing comfort among consumers, single-function textiles have become insufficient to meet the growing market demand. Developing high-quality fabrics with multiple synergistic functions has become an inevitable trend in the industry.

[0003] Currently, public attention to antibacterial and health properties has significantly increased. Meanwhile, warmth is also a core requirement for clothing in cold environments. Existing technologies typically employ two methods to achieve both warmth and antibacterial properties in fabrics: First, applying warming or antibacterial agents to the fabric surface through coating finishing techniques. However, this method often results in stiff fabrics, reduced breathability, and the functional layer easily detaching after washing, leading to insufficient durability. Second, simply blending or weaving functional fibers (such as hollow insulating fibers and antibacterial fibers). However, without scientific material compatibility and structural design, the functions of different fibers may interfere with each other, making it difficult to achieve true synergistic effects, or leading to a significant decrease in fabric comfort (such as skin-friendliness and breathability).

[0004] Therefore, how to develop a multifunctional fabric that is process-controllable, cost-effective, and can simultaneously achieve efficient and durable warmth and antibacterial functions while maintaining good wearing comfort is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] This invention aims to solve the aforementioned problems in the prior art by providing a warm and antibacterial blended fabric and its preparation method. Through an innovative "sandwich" multi-layer structure design, optimized proportions of functional fibers, and specific finishing processes, this fabric achieves a significant synergistic improvement in both warmth and antibacterial properties, while also possessing excellent durability and wearing comfort.

[0006] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, the present invention provides a warm and antibacterial blended fabric, wherein the fabric has a three-layer composite structure, comprising: The outer layer is a windproof and wear-resistant layer, woven from high-density synthetic fiber filaments; The intermediate layer is an antibacterial functional layer, which is a blended material layer composed of silver ion antibacterial fibers and cotton filaments. The inner layer is a skin-friendly and warm layer, which is composed of hollow warm fibers.

[0007] In a preferred embodiment of the present invention, the high-density synthetic fiber filament of the outer layer is polyester filament with a fineness of 75D / 72F and a warp and weft density of over 190T. This specification of outer fabric has a tight structure, a smooth surface, effectively blocks the intrusion of cold air, and provides good abrasion resistance.

[0008] In a preferred embodiment of the present invention, the blending mass ratio of silver ion antibacterial fibers to woven cotton in the intermediate layer is 1:2 to 1:5. The blending mass ratio of silver ion antibacterial fibers to woven cotton can be adjusted according to the target antibacterial level and cost. The woven cotton, acting as a supporting and fluffy material, helps to form a still air layer, thus enhancing the warmth retention effect.

[0009] In a preferred embodiment of the present invention, the hollow insulating fiber of the inner layer is a polyester fiber (PET) or a polypropylene fiber with a hollow structure. The hollow structure can effectively store a large amount of still air, significantly reducing heat conduction, thereby achieving efficient warmth retention. At the same time, the fiber is in direct contact with the skin, possessing good skin-friendliness and a soft feel.

[0010] As a preferred embodiment of the present invention, the total weight of the fabric is 150-250 g / m², in order to meet the application requirements of clothing in autumn and winter.

[0011] Secondly, the present invention provides a method for preparing the above-mentioned warm and antibacterial blended fabric, comprising the following steps: Step S1: Weaving: Using a multi-layer weaving process or a lamination composite process, the outer layer, middle layer, and inner layer are combined to form a fabric with a sandwich structure. Specifically, double-sided jacquard or double-layer weaving techniques can be used to form and connect the outer layer, middle layer, and inner layer in one step during the weaving process.

[0012] Step S2: Pre-setting treatment: The fabric greige obtained in step S1 is subjected to a pre-setting treatment to prevent creases from forming due to uneven shrinkage of the high-density structure of the fabric during subsequent dyeing. The temperature of the pre-setting treatment is 140-160℃, and the machine speed is 20-30 m / min.

[0013] Step S3: Dyeing Treatment: The pre-set fabric is then dyed. The dyeing treatment employs a segmented temperature-increasing dyeing process, specifically including: S31, Place the fabric in the dye bath and keep it at 60℃ for 5-10 minutes; S32, heat to 90℃ at a rate of 1.0-1.5℃ / min, and hold for 5-15 minutes; S33, heat to 115℃ at a rate of 0.8-1.2℃ / min, and hold for 5-15 minutes; S34, heat to 130℃ at a rate of 0.8-1.2℃ / min, and hold for 20-40 minutes; S35, cool to 90℃ at a rate of 1.0-1.5℃ / min, and hold for 5-10 minutes; S36, continue cooling to below 60℃ to complete the staining.

[0014] Step S4: Intermediate setting and drying treatment: The dyed fabric is set and dried with clean water to stabilize the fabric shape and remove moisture. The temperature of the intermediate setting and drying treatment is 165-185℃, and the speed is 20-30 m / min.

[0015] Step S5: Post-treatment antibacterial processing: The fabric treated in step S4 is subjected to a silver ion antibacterial finishing solution through a setting machine to further enhance the antibacterial effect of the fabric and impart it with wash resistance. The temperature of the post-treatment antibacterial processing is 165-185℃, and the machine speed is 15-25 m / min.

[0016] As a preferred embodiment of the preparation method of the present invention, the silver ion antibacterial finishing solution in step S5 comprises the following components by weight percentage: 1.5% - 3.5% silver ion antibacterial agent, 0.5% - 1.5% antibacterial synergist, and the balance being water.

[0017] More preferably, the silver ion antibacterial finishing solution comprises, by weight percentage: 2.5% silver ion antibacterial agent, 1% antibacterial synergist, and 96.5% water.

[0018] As a preferred embodiment of the preparation method of the present invention, the pre-shaping treatment temperature in step S2 is 150°C and the machine speed is 25m / min; the intermediate shaping and drying treatment temperature in step S4 is 175°C and the machine speed is 25m / min; and the post-finishing antibacterial processing temperature in step S5 is 175°C and the machine speed is 20m / min.

[0019] As a preferred embodiment of the preparation method of the present invention, after the treatment in step S5, the amount of silver ion antibacterial agent attached to the fabric is sufficient to ensure that the antibacterial rate against Escherichia coli and Staphylococcus aureus can still be maintained at ≥90% after 50 standard water washes.

[0020] As a preferred embodiment of the preparation method of the present invention, the preparation method may further include step S6 after step S5: finished product inspection and packaging.

[0021] Compared with the prior art, the thermal insulation and antibacterial blended fabric and its preparation method provided by the present invention have the following outstanding beneficial effects: 1. Significant Synergistic Effect: This invention innovatively adopts a "sandwich" functional structure design: an outer layer that is windproof and wear-resistant, a middle layer that is antibacterial, and an inner layer that is skin-friendly and warm. The outer layer of high-density polyester woven fabric effectively blocks cold air and wind; the middle layer of silver ion antibacterial fibers provides core antibacterial function, while the quilted cotton increases the fabric's fluffiness, forming a still air layer to assist in warmth retention; the inner layer of hollow insulating fibers locks in body heat through its special structure. The three layers each perform their respective functions while cooperating with each other, achieving a synergistic effect of 1+1+1>3, avoiding the limitations of single-function processing.

[0022] 2. Excellent warmth retention: The double static air layer formed by the inner hollow insulating fiber and the middle layer of quilted cotton greatly reduces the thermal conductivity of the fabric. According to actual test data, the warmth retention rate of the fabric of this invention can be increased by 35% compared with ordinary fabrics, and the Clo value (CLO) can reach 1.8, which is far superior to similar products on the market.

[0023] 3. Highly effective and durable antibacterial properties: This invention incorporates silver ion antibacterial fibers into the intermediate layer, providing basic and long-lasting antibacterial capabilities. Furthermore, a finishing process adds silver ion antibacterial agents, further enhancing the antibacterial effect. Due to the strong bond between the antibacterial agent and the fiber, according to actual test data, even after 50 standard washes, the inhibition rate against Escherichia coli and Staphylococcus aureus remains at 99%, and the inhibition rate against Candida albicans remains at 95%, demonstrating excellent wash resistance.

[0024] 4. Scientific Process and Stable Quality: The preparation method of this invention is specifically designed for the characteristics of high-density sandwich structure fabrics, employing specific pre-setting conditions and segmented temperature rise dyeing curves. This effectively solves the process problems of creases and uneven dyeing that easily occur in high-density fabrics during the dyeing process. Simultaneously, the entire process flow (weaving → pre-setting → dyeing → setting → antibacterial finishing) is smoothly integrated, with precise parameter control, ensuring the stability and reproducibility of product quality, making it suitable for large-scale industrial production.

[0025] 5. Excellent wearing comfort: The inner layer of the fabric is made of hollow insulating fibers, which are inherently soft and skin-friendly. The three-layer structure design also fully considers the balance of breathability, avoiding the defects of traditional coating methods that cause the fabric to be stuffy and stiff, thus ensuring the wearer's comfortable experience. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the layer structure of the thermal insulation and antibacterial blended fabric in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the preparation method of the warm and antibacterial blended fabric in Embodiment 1 of the present invention.

[0027] Explanation of reference numerals in the attached figures: 1. Outer layer; 2. Middle layer; 3. Inner layer. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components; they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] Example 1 like Figures 1-2 As shown in the figure, this embodiment provides a warm and antibacterial blended fabric and its preparation method.

[0033] (I) Fabric Structure The fabric in this embodiment has a three-layer composite structure, specifically as follows: Figure 1 As shown: Outer layer 1: Made of 75D / 72F polyester filament, woven with a plain weave structure with both warp and weft yarn densities of 190T, forming a dense, smooth, windproof, and wear-resistant layer.

[0034] Intermediate layer 2: Silver ion antibacterial fiber and cotton wadding are mixed at a mass ratio of 1:3 to form a blended layer with antibacterial and fluffy support functions.

[0035] Inner layer 3: Made of hollow insulating polyester fiber (hollowness of about 25%), forming a skin-friendly and soft insulating layer.

[0036] The three-layer structure is formed in one step through a double-sided weaving process, creating a firmly bonded fabric with a total weight of approximately 200 g / m².

[0037] (II) Preparation Method The method for preparing the above-mentioned warm and antibacterial blended fabric includes the following steps, specifically as follows: Figure 2 As shown: S1, Weaving: According to the above fabric structure, a double-sided jacquard loom is used to weave the fabric to obtain the greige fabric.

[0038] S2, Pre-setting treatment: The fabric greige is fed into the setting machine for pre-setting. The setting temperature is controlled at 150℃ and the machine speed is controlled at 25 m / min.

[0039] S3, Dyeing Treatment: Place the pre-set fabric in the dyeing machine for dyeing. The dyeing temperature rise profile must be strictly followed according to the following procedure: S31, initial temperature 60℃, keep warm for 5 minutes; S32, heat to 90℃ at a rate of 1.5℃ / min, and hold for 10 minutes; S33, heat to 115℃ at a rate of 1.0℃ / min, and hold for 10 minutes; S34, heat to 130℃ at a rate of 1.0℃ / min, and hold for 30 minutes; S35, cool down to 90℃ at a rate of 1.5℃ / min, and hold for 5 minutes; S36, continue cooling to 60℃ using natural or assisted cooling, drain the solution, and complete the staining.

[0040] S4, Intermediate setting and drying: The dyed fabric is set and dried on a water setting machine at a setting temperature of 175℃ and a machine speed of 25 m / min.

[0041] S5, Post-treatment antibacterial processing: Prepare a silver ion antibacterial finishing solution, the components of which, by weight percentage, are: 2.5% silver ion antibacterial agent, 1% antibacterial synergist, and 96.5% deionized water. The fabric treated in step 4 is then impregnated with this antibacterial finishing solution through a setting machine. The setting machine's drying chamber temperature is set to 175℃, and the machine speed is 20 m / min, ensuring the finishing solution fully adheres to and is fixed onto the fibers. The silver ion antibacterial agent can interfere with bacterial cell wall synthesis, damage cell membranes, and inhibit protein and nucleic acid synthesis, leading to microbial death. The silver ion antibacterial agent is an inorganic antibacterial agent with silver ions as its active ingredient, achieving its antibacterial or bactericidal effect by releasing silver ions to disrupt the structure of microorganisms. The antibacterial synergist refers to a functional additive that further enhances the antibacterial effect, wash resistance, or duration of action based on the original antibacterial finishing solution. In this embodiment, the antibacterial synergist is preferably a nano-silver antibacterial synergist.

[0042] S6, Finished Product Inspection and Packaging: Inspect the processed fabric and roll and package it according to standard procedures.

[0043] (III) Performance Testing The performance of the thermal and antibacterial blended fabric prepared in this embodiment was tested according to relevant national or industry standards, and the results are shown in Table 1.

[0044] Table 1: Fabric Performance Test Results of Example 1

[0045] Test results show that the fabric prepared in Example 1 of this invention has achieved excellent technical effects in terms of antibacterial, warmth and durability, and has fully exceeded the preset target values.

[0046] Example 2 This embodiment is basically the same as Embodiment 1, except that: Fabric structure: The outer layer of polyester filament warp and weft density is adjusted to 200T; the mixing ratio of silver ion antibacterial fiber and cotton in the middle layer is adjusted to 1:2.

[0047] Preparation method: In the post-treatment antibacterial processing step, the formula of the silver ion antibacterial finishing solution was adjusted to: 3.0% silver ion antibacterial agent, 1.2% antibacterial synergist, and 95.8% water. The setting temperature was adjusted to 170℃, and the machine speed was 18 m / min.

[0048] After testing, the fabric prepared in this embodiment also exhibited excellent antibacterial and warmth-retaining properties. Its antibacterial rate against Escherichia coli and Staphylococcus aureus both reached over 99%, its warmth retention rate was 34%, its Clo value was 1.75, and its antibacterial retention rate was 94% after 50 washes. This proves that the technical solution of the present invention can achieve good technical effects within a wide range of parameters.

[0049] Comparative Example 1 (single antibacterial fiber blend, unstructured design) This comparative example provides a fabric with a conventional single-layer structure, which is woven from a simple blend of hollow thermal insulation fiber, silver ion antibacterial fiber, and ordinary polyester fiber in a mass ratio of 50:20:30. The finishing process is the same as step S5 of Example 1.

[0050] Performance test results: The fabric has a warmth retention rate of 15% and a clo value of 0.9; the E. coli inhibition rate is 90%, which drops to 70% after 50 washes. The results indicate that without a scientific structural design, simply mixing functional fibers cannot achieve an effective synergy between warmth retention and antibacterial functions, and the antibacterial durability is poor.

[0051] Comparative Example 2 (without post-treatment antibacterial processing) The fabric structure of this comparative example is exactly the same as that of Example 1, but step S5 (post-processing antibacterial treatment) is omitted in the preparation method, and the antibacterial function is provided only by the silver ion antibacterial fiber in the middle layer.

[0052] Performance test results: The initial E. coli inhibition rate of this fabric was 80%, which did not reach the high standard of 99%; after 50 washes, the inhibition rate dropped to 50%. This indicates that relying solely on antibacterial fibers blended in the middle layer has limited antibacterial effect and is not wash-resistant.

[0053] Comparative Example 3 (Conventional dyeing process) The fabric structure of this comparative example is exactly the same as that of Example 1, but the dyeing process uses a conventional rapid heating dyeing method (e.g., directly heating to 130°C at 2°C / min and holding at that temperature).

[0054] The results showed that the dyed fabric surface exhibited obvious scratches and color variations, resulting in a significant decrease in the yield rate. This demonstrates that the specific segmented temperature-increasing dyeing process designed for high-density fabrics in this invention is crucial for ensuring product quality.

[0055] The thermal and antibacterial blended fabric and its preparation method provided by this invention can be widely used in various autumn and winter clothing, outdoor sportswear, thermal underwear, home textile products (such as thermal bed sheets and duvet covers), etc., and has extremely high market application value and industrialization prospects.

[0056] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A warm and antibacterial blended fabric, characterized in that, The fabric has a three-layer composite structure, including: The outer layer is a windproof and wear-resistant layer, woven from high-density synthetic fiber filaments; The intermediate layer is an antibacterial functional layer, which is a blended material layer composed of silver ion antibacterial fibers and cotton filaments. The inner layer is a skin-friendly and warm layer, which is composed of hollow warm fibers.

2. The warm and antibacterial blended fabric according to claim 1, characterized in that, The outer layer of high-density synthetic fiber filament is polyester filament with a fineness of 75D / 72F and a warp and weft density of over 190T.

3. The warm and antibacterial blended fabric according to claim 1, characterized in that, In the intermediate layer, the mass ratio of silver ion antibacterial fiber to filament cotton is 1:2 to 1:

5.

4. The warm and antibacterial blended fabric according to claim 1, characterized in that, The total weight of the fabric is 150-250 g / m².

5. A method for preparing a warm and antibacterial blended fabric according to any one of claims 1-4, characterized in that, Includes the following steps: Step S1: Weaving, combining the outer layer, middle layer and inner layer to form a fabric greige with a sandwich structure; Step S2: Pre-setting treatment, the fabric greige obtained in step S1 is subjected to pre-setting treatment, the temperature of the pre-setting treatment is 140-160℃, and the speed is 20-30 m / min; Step S3: Dyeing treatment, the pre-set fabric is subjected to segmented heating and dyeing treatment; Step S4: Intermediate setting and drying treatment. The dyed fabric is set and dried with clean water at a temperature of 165-185℃ and a speed of 20-30 m / min. Step S5: Post-treatment antibacterial processing. The fabric treated in step S4 is subjected to silver ion antibacterial finishing solution through a setting machine. The processing temperature is 165-185℃ and the machine speed is 15-25 m / min.

6. The preparation method according to claim 5, characterized in that, The segmented temperature-increasing staining process in step S3 specifically includes: S31, Place the fabric in the dye bath and keep it at 60℃ for 5-10 minutes; S32, heat to 90℃ at a rate of 1.0-1.5℃ / min, and hold for 5-15 minutes; S33, heat to 115℃ at a rate of 0.8-1.2℃ / min, and hold for 5-15 minutes; S34, heat to 130℃ at a rate of 0.8-1.2℃ / min, and hold for 20-40 minutes; S35, cool to 90℃ at a rate of 1.0-1.5℃ / min, and hold for 5-10 minutes; S36, continue cooling to below 60℃ to complete the staining.

7. The preparation method according to claim 5, characterized in that, The silver ion antibacterial finishing solution in step S5 comprises the following components by weight percentage: 1.5%-3.5% silver ion antibacterial agent, 0.5%-1.5% antibacterial synergist, and the remainder is water.

8. The preparation method according to claim 7, characterized in that, The silver ion antibacterial finishing solution comprises, by weight percentage: 2.5% silver ion antibacterial agent, 1% antibacterial synergist, and 96.5% water.

9. The warm-insulating and antibacterial blended fabric and its preparation method according to claim 5, characterized in that, The pre-shaping treatment temperature in step S2 is 150℃ and the machine speed is 25m / min; the intermediate shaping and drying treatment temperature in step S4 is 175℃ and the machine speed is 25m / min; the post-finishing and antibacterial processing temperature in step S5 is 175℃ and the machine speed is 20m / min.

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