Nylon elastic fabric and preparation method thereof

Abstract

The invention discloses a nylon elastic fabric and a preparation method thereof, belongs to the technical field of textile fabrics, and solves the technical problems that an existing fabric water-repellent processing technology has defects, and the fabric is large in weight, hard in hand feeling, free of a far infrared heating function and a down-proof effect and common in air permeability. The nylon elastic fabric comprises a fabric base material, the fabric base material is nylon filaments, the material of the nylon filaments is N-isopropylacrylamide, the linear density of the nylon filaments is 30D, the fabric base material is coated with a water-repellent film, the material of the water-repellent film is a fluoride-free water-repellent finishing agent, and the water-repellent film is coated with a water-repellent finishing agent. A PU foaming microporous membrane is compounded on the bottom layer of the fabric base material. The preparation method of the nylon elastic fabric comprises the following steps: S1, fabric manufacturing; s2, performing fluorine-free and water-repellent processing on the surface layer; and S3, transferring the bottom layer and laminating the hot-stamping film.

Description

Technical Field

[0001] This application belongs to the field of textile fabric technology, and more specifically, relates to a nylon elastic fabric and its preparation method. Background Technology

[0002] In existing technology, there is a type of woven nylon 40D four-way stretch fabric. Its surface layer undergoes a fluorine-containing water-repellent treatment, and the bottom layer does not use a transfer bonding heat transfer process, but instead achieves a certain degree of waterproofing through a coating. Both the warp and weft yarns of this fabric are nylon 40D filaments, and the fabric structure is plain weave. The elasticity is achieved by adjusting the tension of the warp and weft yarns during the weaving process. This fabric is relatively heavy, has a stiff feel, lacks far-infrared heating function and down-proof effect, and its breathability is average. Summary of the Invention

[0003] To address the shortcomings of existing water-repellent processing techniques, such as heavy fabric weight, stiff hand feel, lack of far-infrared heating function and downproof effect, and mediocre breathability, this paper provides an improved water-repellent processing technique for lightweight, soft-hand feel, far-infrared heating function, and breathable nylon elastic fabric, along with its preparation method.

[0004] To achieve the above objectives, the technical solution adopted in this application is: a nylon elastic fabric, comprising: a fabric substrate, the fabric substrate being nylon filaments, the nylon filaments being made of N-isopropylacrylamide, the nylon filaments having a linear density of 30D, a water-repellent film coated on the fabric substrate, the water-repellent film being made of a fluorine-free water-repellent finishing agent, and a PU foam microporous membrane being laminated to the bottom layer of the fabric substrate.

[0005] Preferably, the thickness of the PU foam microporous membrane is 10-20μm, the micropore diameter is 0.5-5μm, and the density is 0.3-0.5g / cm³.

[0006] Preferably, the PU foamed microporous membrane has far-infrared emission function, and its far-infrared emissivity is not less than 80%.

[0007] Preferably, the warp density of the fabric substrate is 300-350 yarns / 10cm, and the weft density is 250-300 yarns / 10cm.

[0008] A method for preparing a nylon elastic fabric includes the following steps: S1. Fabric manufacturing: Nylon 30D filament is selected as warp and weft yarns, and plain weave is used for weaving. The weaving speed is 300-350r / min, and the tension of the warp and weft yarns is controlled to form a woven nylon fabric substrate with four-way elasticity. S2. Fluorine-free water-repellent surface treatment: The woven fabric is pretreated, and then the fluorine-free water-repellent finishing agent is applied to the surface of the fabric by padding. The fabric is then pre-dried and baked in sequence to form a water-repellent film on the surface of the fabric. S3. Bottom layer transfer bonding heat transfer film: The PU foam microporous film is bonded to the bottom layer of the fabric treated in step S2 using a transfer bonding heat transfer film equipment.

[0009] Preferably, in step S2, the fluorine-free water-repellent finishing agent is diluted with water at a ratio of 1:10 during use, the liquid yield during padding is controlled at 60%-70%, the pre-drying temperature is 100-110℃ and the time is 3-5 minutes, and the baking temperature is 160-170℃ and the time is 1-2 minutes.

[0010] Preferably, in step S2, the pretreatment process for the fabric includes desizing, refining, and bleaching.

[0011] Preferably, in step S3, the bonding temperature of the bottom layer transfer bonding film is 120-140℃, the pressure is 0.3-0.5MPa, and the speed is 15-20m / min.

[0012] Compared with the prior art, the beneficial effects of the present invention are: The nylon elastic fabric and its preparation method provided in this patent, through the use of a multi-layer composite structure design of 30D fine denier nylon filaments, environmentally friendly fluorine-free water-repellent finishing agent, and functional PU foam microporous membrane, combined with optimized weaving and composite process parameters, successfully achieve a series of synergistic and beneficial effects, specifically manifested as follows: 1. The fabric is ultra-lightweight and soft. Due to the use of 30D nylon filament and specific warp and weft density, the fabric weight is significantly reduced, and the feel is fluffy and soft, which greatly improves the wearing comfort. 2. Excellent environmental protection and protective performance. The fluorine-free water-repellent surface treatment not only avoids environmental pollution from fluorine-containing substances, but also provides a durable and washable water-repellent function. 3. Multifunctional integration and enhanced comfort: The bottom layer is a PU foam microporous membrane composited through a precise transfer bonding process, which simultaneously gives the fabric excellent breathability, reliable downproof properties, and optional far-infrared heating function, effectively solving the contradiction between windproof and breathable, and warmth and lightness that are difficult to achieve with traditional fabrics.

[0013] In summary, this invention creates a high-performance fabric that combines lightness, softness, elasticity, environmental friendliness, protection, breathability, and warmth. Its overall performance is significantly superior to existing technologies, greatly expanding its application prospects in high-end outdoor clothing, sports and leisure, and professional protective clothing. Detailed Implementation

[0014] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0015] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0016] A nylon elastic fabric includes: a fabric substrate, the fabric substrate being nylon filaments, the nylon filaments being made of N-isopropylacrylamide, the nylon filaments having a linear density of 30D, a water-repellent film coated on the fabric substrate, the water-repellent film being made of a fluorine-free water-repellent finishing agent, and a PU foam microporous membrane being laminated to the bottom layer of the fabric substrate.

[0017] In the technical solution adopted in this embodiment, the fabric weight is greatly reduced by using nylon filaments with a linear density of 30D as the fabric substrate, making the fabric exceptionally lightweight. At the same time, the use of N-isopropylacrylamide as the material for nylon filaments may give the fabric better skin-friendliness, moisture absorption or other special functions, thereby improving the softness and comfort of wearing it. The fluorine-free water-repellent finishing agent coated on the fabric surface avoids the potential environmental hazards of traditional fluorine finishing agents, which is in line with the development trend of green environmental protection. At the same time, the finishing agent can form an effective water-repellent film, giving the fabric a durable water-repellent function that can effectively resist the splashes of rainwater in daily life. The PU foam microporous membrane laminated to the bottom layer of the fabric not only gives the fabric excellent windproof and downproof properties, preventing fine down or feathers from getting out, but its unique microporous structure also ensures that air moisture can be effectively discharged, achieving a perfect balance between windproof, downproof and high breathability, avoiding the shortcomings of traditional coatings or laminates that are stuffy and not breathable.

[0018] Furthermore, in this embodiment, the thickness of the PU foamed microporous membrane is 10-20 μm, the micropore diameter is 0.5-5 μm, and the density is 0.3-0.5 g / cm³.

[0019] Furthermore, in this embodiment, the PU foamed microporous membrane has far-infrared emission function, and its far-infrared emissivity is not less than 80%.

[0020] Furthermore, in this embodiment, the warp density of the fabric substrate is 300-350 yarns / 10cm, and the weft density is 250-300 yarns / 10cm.

[0021] A method for preparing a nylon elastic fabric includes the following steps: S1. Fabric manufacturing: Nylon 30D filament is selected as warp and weft yarns, and plain weave is used for weaving. The weaving speed is 300-350r / min, and the tension of the warp and weft yarns is controlled to form a woven nylon fabric substrate with four-way elasticity. S2. Fluorine-free water-repellent surface treatment: The woven fabric is pretreated, and then the fluorine-free water-repellent finishing agent is applied to the surface of the fabric by padding. The fabric is then pre-dried and baked in sequence to form a water-repellent film on the surface of the fabric. S3. Bottom layer transfer bonding heat transfer film: The PU foam microporous film is bonded to the bottom layer of the fabric treated in step S2 using a transfer bonding heat transfer film equipment.

[0022] Furthermore, in this embodiment, in step S2, the fluorine-free water-repellent finishing agent is diluted with water at a ratio of 1:10 during use, the roll-up rate during padding is controlled at 60%-70%, the pre-drying temperature is 100-110℃, and the time is 3-5 minutes; the baking temperature is 160-170℃, and the time is 1-2 minutes.

[0023] Furthermore, in this embodiment, step S2 includes pretreatment processes for the fabric, including desizing, refining, and bleaching.

[0024] Furthermore, in this embodiment, in step S3, the bonding temperature of the bottom layer transfer bonding film is 120-140℃, the pressure is 0.3-0.5MPa, and the speed is 15-20m / min.

[0025] In the technical solution adopted in this embodiment, by using a plain weave variation structure in step S1 and precisely controlling the warp and weft yarn tension and weaving speed (300-350r / min) during the weaving process, the fabric has a uniform and good elastic recovery rate in both warp and weft directions, forming a stable and reliable "four-way stretch" effect, ensuring that the clothing can stretch and contract freely and is not easily deformed when the human body moves. The pretreatments such as desizing, refining and bleaching carried out in step S2 can completely remove the oils, sizing agents and impurities introduced during fabric weaving, providing a clean and activated base for subsequent fluorine-free water-repellent processing and transfer bonding, ensuring the adhesion and uniformity of finishing agents and films, thereby improving the overall quality and appearance of the final product. In step S2, by precisely controlling the dilution ratio (1:10), roll-in rate (60%-70%), and process parameters of pre-drying (100-110℃, 3-5 min) and baking (160-170℃, 1-2 min) of the fluorine-free water-repellent finishing agent, a dense, uniform, and firmly bonded water-repellent film can be formed on the fabric surface. This process not only avoids environmental pollution from fluorine-containing compounds but also ensures excellent washability and a long service life for the water-repellent function. In step S3, the heat transfer film is transferred and bonded under specific temperature (120-140℃), pressure (0.3-0.5MPa), and speed (15-20m / min) conditions, so that the PU foam microporous film and the bottom layer of the fabric achieve a high-strength, seamless bond. This process avoids the environmental pollution and hardening issues that may be caused by glue bonding. Ultimately, the composite fabric has excellent breathability, reliable downproof properties, and good far-infrared heating function. Moreover, the composite layer is strong, durable, and not easy to peel off.

[0026] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., are used only for the convenience of describing this invention and for 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, and therefore should not be construed as a limitation of this invention. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A nylon elastic fabric, characterized in that, include: The fabric substrate is made of nylon filaments, the material of which is N-isopropylacrylamide, and the linear density of which is 30D. A water-repellent film is coated on the fabric substrate, the material of which is a fluorine-free water-repellent finishing agent. A PU foam microporous membrane is laminated to the bottom layer of the fabric substrate.

2. The nylon elastic fabric according to claim 1, characterized in that, The PU foamed microporous membrane has a thickness of 10-20 μm, a micropore diameter of 0.5-5 μm, and a density of 0.3-0.5 g / cm³.

3. The nylon elastic fabric according to claim 1 or 2, characterized in that, The PU foamed microporous membrane has far-infrared emission function, and its far-infrared emissivity is not less than 80%.

4. The nylon elastic fabric according to claim 1, characterized in that, The fabric substrate has a warp density of 300-350 yarns / 10cm and a weft density of 250-300 yarns / 10cm.

5. A method for preparing a nylon elastic fabric, characterized in that, Includes the following steps: S1. Fabric manufacturing: Nylon 30D filament is selected as warp and weft yarns, and plain weave is used for weaving. The weaving speed is 300-350r / min, and the tension of the warp and weft yarns is controlled to form a woven nylon fabric substrate with four-way elasticity. S2. Fluorine-free water-repellent surface treatment: The woven fabric is pretreated, and then the fluorine-free water-repellent finishing agent is applied to the surface of the fabric by padding. Pre-drying and baking are carried out in sequence to form a water-repellent film on the surface of the fabric. S3. Bottom layer transfer bonding heat transfer film: The PU foam microporous film is bonded to the bottom layer of the fabric treated in step S2 using a transfer bonding heat transfer film equipment.

6. The method for preparing nylon elastic fabric according to claim 5, characterized in that, In step S2, the fluorine-free water-repellent finishing agent is diluted with water at a ratio of 1:10 during use. The liquid yield during immersion is controlled at 60%-70%, the pre-drying temperature is 100-110℃, and the time is 3-5 minutes; the baking temperature is 160-170℃, and the time is 1-2 minutes.

7. The method for preparing nylon elastic fabric according to claim 5, characterized in that, In step S2, the pretreatment process for the fabric includes desizing, refining, and bleaching.

8. The method for preparing nylon elastic fabric according to claim 5, characterized in that, In step S3, the bonding temperature of the bottom layer transfer bonding film is 120-140℃, the pressure is 0.3-0.5MPa, and the speed is 15-20m / min.