Self-regulating temperature control warp fabric

Abstract

The utility model discloses a kind of automatic temperature-adjusting warp-knitted fabrics, including the interwoven layer of phase change temperature-regulating filament and elastic yarn interwoven, phase change temperature-regulating filament and elastic yarn are woven using same oblique loop structure;The phase change enthalpy of fabric is not less than 35 J / g.The utility model provides a kind of automatic temperature-adjusting warp-knitted fabric, and comfort wearing performance and long-lasting efficient temperature-regulating function are considered.

Description

Technical Field

[0001] This utility model relates to the field of textile functional materials, specifically to an automatic temperature-regulating warp-knitted fabric. Background Technology

[0002] In existing technologies, imparting temperature-regulating functions to fabrics often involves attaching phase change microcapsules to the fiber surface through coating, padding, or other methods, or mixing them into short fibers before spinning. An inherent drawback of this approach is the low bonding strength between the microcapsules and fibers. These microcapsules are easily detached or damaged during textile processing and daily washing, leading to a rapid decline in the temperature-regulating function and its lack of durability. Simultaneously, surface coatings can clog fiber gaps, resulting in a stiff fabric feel and reduced breathability. Microcapsule-coated short fibers, on the other hand, face challenges such as complex spinning processes and rough fiber surfaces prone to pilling. Furthermore, existing woven or knitted fabrics typically have simple or conventional weaving structures. These structures are not designed to simultaneously optimize multiple objectives, including temperature regulation, uniform elasticity distribution, smooth hand feel, and breathability. For example, some structures may sacrifice elasticity and breathability for stability, while others may prioritize thinness over providing a stable support for the phase change material, resulting in unsatisfactory temperature-regulating effects. Utility Model Content

[0003] The purpose of this invention is to overcome the aforementioned defects or problems in the prior art and to provide an automatic temperature-regulating warp-knitted fabric that combines comfortable wear performance with long-lasting and efficient temperature regulation.

[0004] To achieve the above objectives, the various embodiments of this utility model adopt the following technical solutions, but are not limited to the following solutions: The first technical solution relates to an automatic temperature-regulating warp-knitted fabric, comprising a woven layer interwoven from phase change temperature-regulating filaments and elastic yarns, wherein the phase change temperature-regulating filaments and elastic yarns are woven using the same oblique loop structure; the phase change enthalpy of the fabric is not less than 35 J / g.

[0005] The second technical solution is based on the first technical solution, wherein the oblique loop structure forms a continuous zigzag orientation on the fabric surface.

[0006] The third technical solution is based on the first technical solution, wherein the oblique loop structure is a three-needle variation warp satin weave structure.

[0007] The fourth technical solution is based on the third technical solution, wherein the three-needle variable warp satin structure is formed by a warp knitting structure with padding yarn numbers of 0-1 / 2-1 / 3-2 / 1-2 / / .

[0008] The fifth technical solution is based on the first technical solution, wherein the phase change temperature regulating filament includes a matrix and phase change temperature regulating particles dispersed in the matrix.

[0009] The sixth technical solution is based on the first technical solution, wherein the phase change temperature regulating filament is a phase change temperature regulating FDY filament.

[0010] The seventh technical solution is based on the sixth technical solution, in which the phase change temperature-regulating FDY filament is made of nylon.

[0011] The eighth technical solution is based on the first technical solution, wherein the elastic yarn is spandex yarn.

[0012] As can be seen from the above description of the various embodiments of the present utility model, compared with the prior art, the various embodiments of the present utility model have the following beneficial effects: In the first technical solution and related embodiments, a warp-knitted fabric with both high-efficiency intelligent temperature regulation and excellent wearing comfort is provided. The phase change temperature-regulating filament and elastic yarn are woven using the same oblique loop structure, forming a unified elastic recovery system within the fabric. This synergistic weaving structure ensures uniform elasticity in both warp and weft directions, avoiding the directional differences in elasticity caused by different yarn weaving methods in traditional elastic fabrics. This structure reduces the internal frictional resistance of the yarn during stretching and recovery, solving common wrinkle problems such as "finger marks" in elastic fabrics, allowing the fabric to maintain a smooth and crisp appearance and good shape stability even after repeated stretching. The oblique loop structure creates a uniform microtexture on the fabric surface, while simultaneously forming a smooth underlayer on the reverse side through interlaced loop structures, giving the fabric both a smooth feel and rich visual depth. At the same time, this structure creates numerous uniformly distributed micropores between the fibers, providing excellent breathability while ensuring fabric tightness, ensuring comfortable and breathable wear. This porous weaving structure provides an ideal functional carrier for the phase change temperature-regulating filament. On the one hand, the robust coil structure effectively protects the phase change material inside the phase change temperature regulating filament, ensuring its integrity during textile processing and use; on the other hand, the uniform pore structure provides an optimal environment for heat exchange, enabling the fabric to fully utilize its phase change temperature regulating function, achieving efficient heat storage and release with a phase change enthalpy of not less than 35 J / g, and realizing a long-lasting bidirectional automatic temperature regulation function.

[0013] In the second technical solution and related embodiments, the oblique loop structure forms a continuous zigzag orientation on the fabric surface, promoting a balanced distribution of warp and weft elasticity.

[0014] In the third technical solution and related embodiments, the oblique loop structure is a three-needle variable warp satin weave structure, which effectively coordinates the relationship between the fabric's smooth feel, stable elasticity and breathability.

[0015] In the fourth technical solution and related embodiments, a specific padding yarn number is defined, which provides a specific implementation scheme for the three-needle variable warp satin weave structure, ensuring the repeatability and stability of the structure.

[0016] In the fifth technical solution and related embodiments, a basic fabric structure with stable and long-lasting bidirectional automatic temperature regulation function is provided. Phase change temperature-regulating particles dispersed within the phase change filament matrix can respond to changes in ambient temperature using their latent heat of phase change: when the ambient temperature rises, the particles change from a solid to a liquid state, absorbing and storing heat, delaying the rise in body surface temperature, and producing a cooling sensation; when the ambient temperature decreases, the particles return from a liquid to a solid state, releasing the stored heat, slowing the drop in body surface temperature, and providing a warming effect. This thermal regulation capability based on physical phase change can effectively suppress microenvironmental temperature fluctuations, forming a more stable microclimate zone around the human body, improving wearing comfort, and reducing discomfort caused by temperature changes.

[0017] In the sixth technical solution and related embodiments, the phase change temperature regulating filament is in the form of FDY (fully drawn yarn), which makes full use of the advantages of FDY filament such as smooth surface, high strength and dimensional stability, to achieve the final smooth hand feel, durability and flatness of the fabric.

[0018] In the seventh technical solution and related embodiments, the filament material is nylon. Nylon itself has excellent properties of being soft and wear-resistant, which further enhances the fabric's functionality, comfort, and durability.

[0019] In the eighth technical solution and related embodiments, the elastic yarn is spandex, which provides the fabric with stable and excellent elastic recovery, ensuring a close-fitting comfort and freedom of movement when wearing it. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 The diagram shows the fabric structure of an automatically temperature-regulating warp-knitted fabric as an example. Figure 2 This is a comparison of the temperature rise curves of automatically temperature-regulating warp-knitted fabric and ordinary fabric in an example. Figure 3 The following is a comparison of the cooling curves of the automatically temperature-regulating warp-knitted fabric and the ordinary fabric, as an example. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0024] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does 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 limiting the specific protection scope of this utility model.

[0025] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0026] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0027] See Figures 1 to 3 An automatic temperature-regulating warp-knitted fabric includes a woven layer composed of phase change temperature-regulating filaments and elastic yarns, wherein the phase change temperature-regulating filaments and the elastic yarns are woven using the same oblique loop structure; the phase change enthalpy of the fabric is not less than 35 J / g.

[0028] Specifically, such as Figure 1As shown, the oblique loop structure forms a continuous zigzag orientation on the fabric surface. In this embodiment, the oblique loop structure is a three-needle variable warp satin weave structure. The three-needle variable warp satin weave structure is formed by a warp knitting structure with padding yarn numbers of 0-1 / 2-1 / 3-2 / 1-2 / / . The knitted layer is made by simultaneously knitting 4,000 to 5,000 yarns. This simultaneous knitting of thousands of yarns using a three-needle variable warp satin weave structure ensures the uniformity, density, and integrity of the microtexture appearance, and utilizes the complex pore structure formed by large-scale yarn interlacing to synergistically enhance the breathability of the fabric.

[0029] The phase change temperature-regulating filament comprises a matrix and phase change temperature-regulating particles dispersed within the matrix. Specifically, the phase change temperature-regulating filament is a phase change temperature-regulating FDY filament. In this embodiment, nylon material is used, with a fineness ranging from 20D to 100D, preferably 40D / 34F nylon FDY.

[0030] The elastic yarn is preferably spandex yarn with a fineness ranging from 20D to 70D. 40D LYCRA is preferred.

[0031] In this embodiment, phase change thermoregulating filaments utilize melt spinning to encapsulate phase change thermoregulating particles within the fiber. These particles, dispersed within the filament matrix, can respond to changes in ambient temperature using their latent heat of phase change: when the ambient temperature rises, the particles transition from a solid to a liquid state, absorbing and storing heat, thus slowing the rise in body surface temperature and producing a cooling sensation; when the ambient temperature decreases, the particles revert from a liquid to a solid state, releasing the stored heat, mitigating the drop in body surface temperature, and providing warmth. This thermoregulation capability based on physical phase change effectively smooths out microenvironmental temperature fluctuations, creating a more stable microclimate around the body, improving wearing comfort, and reducing discomfort caused by temperature changes.

[0032] Compared to fabrics made from phase change microcapsule short-fiber yarns, this embodiment directly uses phase change temperature-regulating filaments for weaving, avoiding the problems of excessive fiber fuzz and rough surface caused by microcapsules adhering to the surface of short fibers. Phase change temperature-regulating filaments themselves have a smooth surface and dense structure, resulting in a softer, smoother feel to the final fabric, with low pilling tendency and good abrasion resistance. Simultaneously, the unique warp-knitting method gives the fabric good elasticity and drape while ensuring ample porosity between fibers, giving the fabric excellent breathability and solving the stuffiness and stiffness commonly found in traditional coated or composite temperature-regulating fabrics.

[0033] This embodiment uses phase change thermoregulating filaments with a matrix and dispersed phase structure as the main body. This ensures, from a physical structure perspective, that the phase change material is encapsulated within the fiber, enabling it to stably and persistently complete the aforementioned heat absorption and release cycles. This overcomes the shortcomings of existing technologies where microcapsules, obtained through coating, padding, or embedding into short fibers, suffer from low bonding strength and easy detachment. Therefore, even after multiple wears and washes, the internal phase change material is not easily lost or damaged, ensuring the long-term stability of the thermoregulating function and extending the product's lifespan. Simultaneously, the introduction of elastic yarn interweaving provides the fabric with necessary elasticity and close-fitting comfort, enhancing the garment's comfort and environmental adaptability.

[0034] This embodiment provides a warp-knitted fabric that combines efficient intelligent temperature regulation with excellent wearing comfort. The phase change temperature-regulating filament and elastic yarn are woven using the same oblique loop structure, forming a unified elastic recovery system within the fabric. This synergistic weaving structure ensures uniform elasticity in both warp and weft directions, avoiding the directional differences in elasticity caused by different yarn weaving methods in traditional elastic fabrics. This structure reduces internal frictional resistance during yarn stretching and recovery, solving common wrinkle problems such as "fingerprints" in elastic fabrics, allowing the fabric to maintain a smooth and crisp appearance and good shape stability even after repeated stretching. The oblique loop structure creates a uniform microtextured appearance on the fabric surface, while simultaneously forming a smooth underlayer on the reverse side through interlaced loop structures, giving the fabric both a smooth feel and rich visual depth. Furthermore, this structure creates numerous uniformly distributed micropores between the fibers, providing excellent breathability while maintaining fabric density, ensuring comfortable and cool wear. This porous weaving structure provides an ideal functional carrier for the phase change temperature-regulating filament. On the one hand, the robust coil structure effectively protects the phase change material inside the phase change temperature regulating filament, ensuring its integrity during textile processing and use; on the other hand, the uniform pore structure provides an optimal environment for heat exchange, enabling the fabric to fully utilize its phase change temperature regulating function, achieving efficient heat storage and release with a phase change enthalpy of not less than 35 J / g, and realizing a long-lasting bidirectional automatic temperature regulation function.

[0035] The following are the preparation processes for phase change temperature-regulating filaments and automatic temperature-regulating warp-knitted fabrics.

[0036] Step 1: Preparation of Temperature-Regulated Chemical Fiber Filament (FDY) Preparation of spinning melt: Dried nylon chips and temperature-controlled masterbatch are melted and homogenized in a screw extruder in a certain proportion to form a spinning melt, which is then conveyed to the spinning box.

[0037] Metering and Filtration: The melt is delivered to the spinning assembly at a constant flow rate by a metering pump. The metal screen and sand layer in the assembly perform final filtration and pressure stabilization of the melt.

[0038] Spinning and cooling: The melt is extruded through the spinneret to form a fine melt stream, which then enters the side blowing chamber and is cooled and solidified at a uniform rate under the conditions of cooling air temperature of 18±1℃ and humidity of 65±5%.

[0039] Bundling and oiling: The cured monofilaments are gathered by a bundler and FDY-specific oil is applied evenly through an oil nozzle.

[0040] Stretching and heat setting: The filaments are sequentially passed through the first hot roller (75-85℃) and the second hot roller (130-150℃) for multi-stage hot stretching. The stretching ratio is controlled between 2.0 and 3.0 to orient and crystallize the fiber macromolecular chains, thereby obtaining stable FDY filaments.

[0041] Networking and winding: The filament is networked by a networker under a pressure of 0.20 to 0.35 MPa, and finally wound into a cylinder at a speed of 3500 to 5000 m / min.

[0042] Key process parameter control points: Spinning temperature: 245~275℃ Component pressure: 12~18 MPa Cooling air conditions: air temperature 18±1℃, humidity 65±5% Draw ratio: 2.0–3.0 Winding speed: 3500~5000 m / min Step 2: Fabric Weaving Warping: The obtained temperature-controlled FDY filament is used as the main warp yarn and warped together with spandex yarn in an environment of 25°C and 65% humidity to ensure uniform tension.

[0043] Warp knitting: High-speed warp knitting machines with machine numbers E36-E44 are used; full-thread knitting method is adopted; temperature-controlled filament yarn feed rate is 880, and spandex yarn feed rate is 520.

[0044] Yarn padding numbers: 0-1 / 2-1 / 3-2 / 1-2 / / Knitting speed: 800-1200 rpm The weaving process is completed in a constant temperature and humidity workshop environment.

[0045] Step 3: Post-dyeing and finishing treatment The woven fabric undergoes washing, pre-setting, dyeing, and post-setting in sequence.

[0046] Step 4: Performance Characterization The tested fabric exhibited excellent performance. Its phase change enthalpy reached 35 J / g, ensuring efficient heat storage / release capabilities. The maximum temperature difference between heating and cooling was 5.6℃, both meeting the highest functional performance level (AAAAA grade) for phase change temperature-regulating fabrics in the industry standard T / GDBX 064-2023. After 10 washes, the enthalpy value showed virtually no significant change.

[0047] Figure 2 This is a comparison of the temperature rise curves of automatically temperature-regulating warp-knitted fabric and ordinary fabric in an example. Figure 3 The diagram shows the cooling curves of the automatically temperature-regulating warp-knitted fabric and the ordinary fabric in the example. It can be seen that the temperature-regulating function of the automatically temperature-regulating warp-knitted fabric is bidirectional, effectively mitigating fluctuations caused by increases or decreases in ambient temperature, reducing the impact on the human body, and improving wearing comfort. The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. An automatically temperature-regulating warp-knitted fabric, characterized in that, It includes a braided layer made of phase change temperature-regulating filaments and elastic yarns, wherein the phase change temperature-regulating filaments and elastic yarns are woven using the same oblique loop structure; the phase change enthalpy of the fabric is not less than 35 J / g.

2. The automatically temperature-regulating warp-knitted fabric as described in claim 1, characterized in that, The oblique loop structure forms a continuous zigzag orientation on the fabric surface.

3. The automatically temperature-regulating warp-knitted fabric as described in claim 1, characterized in that, The oblique loop structure is a three-needle variation warp satin weave structure.

4. The automatically temperature-regulating warp-knitted fabric as described in claim 3, characterized in that, The three-needle variation warp satin weave structure is formed by a warp knitting structure with padding yarn numbers of 0-1 / 2-1 / 3-2 / 1-2 / / .

5. The automatically temperature-regulating warp-knitted fabric as described in claim 1, characterized in that, The phase change temperature-regulating filament is a phase change temperature-regulating FDY filament.

6. The automatically temperature-regulating warp-knitted fabric as described in claim 5, characterized in that, The phase change temperature-regulating FDY filament is made of nylon.

7. The automatically temperature-regulating warp-knitted fabric as described in claim 1, characterized in that, The elastic yarn is spandex yarn.

Images