Temperature-induced deformation multilayer fabric and product thereof

Abstract

The invention discloses a temperature-induced deformation multilayer fabric and a product thereof, and belongs to the technical field of textiles. The fabric is mainly made of temperature-induced deformation fibers and other types of fibers. The problems that the shape of a traditional multi-layer fabric cannot be changed along with the temperature change and the volume of an air layer in the multi-layer fabric cannot be adjusted are solved, the multi-layer fabric has the characteristics of temperature sensing, self-driven adjustment and the like by using the temperature-induced deformation fibers in the warp and weft yarns, and the thickness of the multi-layer fabric can be changed along with the temperature change; therefore, the volume of the middle air layer of the multi-layer fabric is adjusted.

Description

Technical Field

[0001] This invention belongs to the field of textile technology, specifically relating to a thermo-deformable multilayer fabric and its products. Background Technology

[0002] As warm-blooded animals, humans maintain their body temperature within a very narrow range. When environmental temperatures change too frequently and exceed the body's regulatory capacity, humans need to adjust their clothing appropriately to balance the changing climate and maintain thermal balance. Otherwise, the body faces the risk of overheating or undercooling. Clothing, as the body's "second skin," plays a crucial role in regulating thermal comfort. However, traditional clothing, due to its constant insulation properties, has limited capacity for thermal regulation.

[0003] By applying novel textile materials and garment functional designs, clothing with temperature-regulating capabilities that comes into close contact with the human body can be developed. This compensates for the inadequacy of the body's own physiological thermoregulation in cold environments, providing the wearer with additional protection. Unlike traditional thermal insulation materials, temperature-regulating materials can passively or actively heat / cool to control heat loss from the body. Currently, self-regulating fabrics are mainly achieved through the use of shape memory materials, multiphase materials, heat-exothermic fibers, and electrically conductive polyesters.

[0004] Shape memory materials primarily achieve temperature regulation through the use of shape memory polyurethane coatings, calendering of films, gels, and fibers. For example, innovative smart fabrics that can elastically adjust temperature rely on a biomimetic temperature-regulating film with "shape memory function." This film can fine-tune the temperature of clothing according to weather changes, elastically regulate water vapor permeability, quickly expel moisture, and simultaneously possess high waterproof and windproof performance. Textiles containing phase change materials can intelligently identify ambient temperature, providing a comfortable "microclimate" environment within the clothing, keeping the body in a comfortable state. When the external ambient temperature rises, the phase change material absorbs heat, changing from a solid to a liquid state, lowering the body surface temperature; conversely, when the external ambient temperature decreases, the phase change material releases heat, changing from a liquid to a solid state, reducing heat loss from the body to the surroundings and maintaining a normal body temperature. Electrically heated fibers mainly refer to fibers using phase change temperature-regulating materials, achieving temperature regulation through infrared absorption. This is a high-tech product developed by combining phase change energy storage material technology with fiber manufacturing technology.

[0005] Currently, temperature regulation methods for clothing, such as shape memory materials, phase change materials, and fan-type ventilated clothing, are still in the exploratory research stage. The corresponding theories and application technologies are not yet mature, and there are still many shortcomings in terms of temperature regulation effects. For example, temperature-regulating clothing made of shape memory materials has thicker fabrics and requires a relatively significant temperature difference to produce deformation, which greatly limits the wearing environment and reduces the practicality of the clothing. At the same time, shape memory alloys are expensive, resulting in high clothing costs and low market acceptance. Phase change material temperature-regulating clothing mostly utilizes the heat absorption effect of the material to regulate and dissipate heat from the human body, but its effectiveness in regulating human body temperature in low-temperature environments needs further verification. Fan-type ventilated clothing has a large temperature regulation system, making it inconvenient to carry. The evaporator pipes fixed to the clothing area need further optimization; if the area is too large or the position is unsuitable, some areas of the body may become too cold. Therefore, it is necessary to develop a smart fabric that is lightweight, requires no external power source, can efficiently and automatically respond within the daily temperature range, and significantly improves thermal insulation performance. Summary of the Invention

[0006] To address the shortcomings of the prior art, this invention discloses a thermo-deformable multilayer fabric woven from thermo-deformable fibers. This multilayer fabric utilizes the principle of air insulation, combining thermo-deformable fibers with a multilayer hollow fabric structure. By inducing the deformation of the thermo-deformable fibers at low temperatures, the multilayer fabric structure is deformed, forming a hollow arched space. This alters the fabric thickness and the air layer within the fabric to change the fabric's insulation performance, ultimately achieving temperature regulation and forming an inflatable temperature-regulating garment based on changing the air layer.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a thermo-deformable multilayer fabric is provided, comprising an upper fabric A and a lower fabric B stacked together; both the upper fabric A and the lower fabric B contain thermo-deformable fibers and non-thermo-deformable fibers; when the temperature drops from 30°C to -20°C, a hollow structure is formed between the upper fabric A and the lower fabric B, and the thickness of the multilayer fabric increases by at least 3 times; the thermo-deformable fiber is a fiber that elongates by more than 2% along its length direction when the temperature drops from 30°C to -20°C.

[0008] Based on the above technical solution, the present invention can be further improved as follows: Furthermore, the upper fabric A and the lower fabric B are woven fabrics; the diameter of the thermo-deformable fibers is 0.001~4mm, and the thermo-deformable fibers have a helical structure.

[0009] Furthermore, the mass percentage of thermo-deformable fibers in the upper fabric A or the lower fabric B is more than 5%.

[0010] Furthermore, in the upper fabric A or the lower fabric B, the spacing between adjacent thermo-deformable fibers arranged along the warp or weft direction is 0.01~5mm.

[0011] Furthermore, within a complete fabric structure cycle: When thermo-deformable fibers are used as weft yarns, the number of warp weft points on the thermo-deformable fibers in the upper fabric A is less than the number of warp weft points on the thermo-deformable fibers in the lower fabric B. When the thermo-deformable fiber is used as the warp yarn, the number of weft points on the thermo-deformable fiber in the upper fabric A is less than or equal to the number of weft points on the thermo-deformable fiber in the lower fabric B.

[0012] Furthermore, within a complete fabric weave cycle: When thermo-deformable fibers are used as weft yarns, the ratio of the total weft float length of the thermo-deformable fibers in the upper fabric A to the total weft float length of the thermo-deformable fibers in the lower fabric B is at least 1. When thermo-deformable fibers are used as warp yarns, the ratio of the total warp float length of the thermo-deformable fibers in the upper fabric A to the total warp float length of the thermo-deformable fibers in the lower fabric B is at least 1.

[0013] Furthermore, when thermo-deformable fibers are used as weft yarns, the weft float length of thermo-deformable fibers in the upper fabric A is ≥2, and the weft float length of thermo-deformable fibers in the lower fabric B is ≤2; when thermo-deformable fibers are used as warp yarns, the warp float length of thermo-deformable fibers in the upper fabric A is ≥2, and the warp float length of thermo-deformable fibers in the lower fabric B is ≤2.

[0014] Furthermore, when the temperature drops from 30°C to -20°C, the thickness of the multilayer fabric increases by at least 20 times.

[0015] Furthermore, it also includes fabric layer C, which forms a hollow structure with the lower fabric layer B when the temperature drops from 30°C to -20°C.

[0016] The present invention also discloses a thermo-deformable article, which is made from the above-mentioned thermo-deformable multilayer fabric.

[0017] The beneficial effects of this invention are: 1. The multilayer thermo-deformable fabric provided by this invention has unique properties. Its thickness can linearly change with the ambient temperature within the range of -20℃ to 30℃. At low temperatures, it can form a significant hollow structure, increasing the thickness by at least 3 times. This hollow structure can accommodate more air, thereby greatly improving the fabric's warmth retention performance; at high temperatures, it returns to its flat state and initial warmth retention performance, giving the fabric the ability to adaptively adjust its warmth retention with temperature.

[0018] 2. When the temperature changes, thermo-deformable fibers will undergo corresponding elongation or shrinkage. The multi-layer thermo-deformable fabric in this invention can regulate the transmission of the driving force generated by the thermo-deformable fibers by controlling the floating length of the thermo-deformable fibers in the fabric, thereby realizing the control of the thermo-deformation response temperature, deformation arching direction and response amplitude of the fabric.

[0019] 3. When the temperature changes, thermo-deformable fibers will undergo corresponding elongation or shrinkage. The multi-layer thermo-deformable fabric in this invention can adjust the transmission direction and efficiency of the driving force generated by the thermo-deformable fibers by controlling the number of repeats in the weave pattern of the upper and lower layers of the fabric, as well as the control of the yarn spacing and interlacing point distribution of the fabric weave. This allows for the control of the deformation area of ​​the upper and lower layers of the fabric, thereby controlling the hollow volume formed by the overall multi-layer thermo-deformable fabric.

[0020] 4. When thermo-deformable fibers are used as warp or weft yarns, they can sense changes in ambient temperature and produce corresponding length changes (such as elongation at low temperatures causing the fabric to arch). However, the fabric structure must meet specific conditions: when thermo-deformable fibers are used as warp / weft yarns, their float length must be no less than 2; too short a float length (too many interlacing points) will significantly limit their deformation ability.

[0021] 5. To achieve sufficient thickness variation (i.e., to form a sufficient hollow air layer), it is necessary to ensure that the upper fabric A arches upwards and the lower fabric B arches downwards. This requires the thermochromic fibers to have sufficient float to reduce constraint and allow for free arching. When the thermochromic fibers are used as warp yarns: the weft points on them in the upper fabric A will inhibit upward arching, while the weft points on them in the lower fabric B will promote downward arching. Therefore, the number of weft points on the thermochromic warp yarns in the upper fabric A should be less than or equal to the number of weft points in the lower fabric B. When the thermochromic fibers are used as weft yarns: the warp points on them in the upper fabric A will inhibit upward arching, while the warp points on them in the lower fabric B will promote downward arching. Therefore, the number of warp points on the thermochromic weft yarns in the upper fabric A should be less than or equal to the number of warp points in the lower fabric B. Attached Figure Description

[0022] Figure 1 This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Example 1 of the present invention; Figure 2 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Example 1 of the present invention; Figure 3 This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Example 2 of the present invention; Figure 4 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Example 2 of the present invention; Figure 5This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Example 3 of the present invention; Figure 6 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Example 3 of the present invention; Figure 7 This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Example 4 of the present invention; Figure 8 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Example 4 of the present invention; Figure 9 This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Example 5 of the present invention; Figure 10 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Example 5 of the present invention; Figure 11 This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Comparative Example 1 of the present invention; Figure 12 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Comparative Example 1 of the present invention; Figure 13 This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Comparative Example 2 of the present invention; Figure 14 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Comparative Example 2 of the present invention; Figure 15 This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Comparative Example 3 of the present invention; Figure 16 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Comparative Example 3 of the present invention; Figure 17 This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Comparative Example 4 of the present invention; Figure 18 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Comparative Example 4 of the present invention; Figure 19 This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Comparative Example 5 of the present invention; Figure 20 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Comparative Example 5 of the present invention; Figure 21 This is a weave diagram of the upper layer fabric A of the multilayer fabric obtained in Comparative Example 6 of the present invention; Figure 22 This is a weave diagram of the lower layer fabric B of the multilayer fabric obtained in Comparative Example 6 of the present invention; Figure 23 This is a diagram showing the effect of the multilayer fabric obtained in Example 1 of the present invention arching in an environment of -20℃; Figure 24 This is a diagram showing the effect of the multilayer fabric obtained in Example 2 of the present invention arching in an environment of -20℃; Figure 25 This is a diagram showing the effect of the multilayer fabric obtained in Example 3 of the present invention arching in an environment of -20℃; Figure 26 This is a diagram showing the effect of the multilayer fabric obtained in Example 4 of the present invention arching in an environment of -20℃. Figure 27 This is a diagram showing the effect of the multilayer fabric obtained in Example 5 of the present invention arching in an environment of -20℃; Figure 28 This is a diagram showing the effect of the multilayer fabric obtained in Comparative Example 1 of the present invention arching in an environment of -20℃. Figure 29 This is a diagram showing the effect of the multilayer fabric obtained in Comparative Example 2 of the present invention arching in an environment of -20℃. Figure 30 This is a diagram showing the effect of the multilayer fabric obtained in Comparative Example 3 of the present invention arching in an environment of -20℃. Figure 31 This is a diagram showing the effect of the multilayer fabric obtained in Comparative Example 4 of the present invention arching in an environment of -20℃. Figure 32 This is a diagram showing the effect of the multilayer fabric obtained in Comparative Example 5 of the present invention arching in an environment of -20℃. Figure 33 This is a diagram showing the effect of the multilayer fabric obtained in Comparative Example 6 of the present invention arching in an environment of -20℃. Detailed Implementation

[0023] Thickness: The distance between the outer surfaces of the uppermost and lowermost layers of a multi-layered fabric. When a hollow space is formed, the hollow space is considered part of the thickness.

[0024] Spiral: It has a cylindrical shape, similar to the structure of a spring helix, and has a curved shape with rotational symmetry.

[0025] Float length: refers to the length of a single yarn that continuously floats above several yarns from another system. This continuous float length can be expressed using weave points.

[0026] Weft weft point: The point where the warp and weft yarns intersect is called the weft weft point (float). Where the weft yarn is on the warp yarn, it is called the weft weft point (weft float). When the rise and fall patterns of the warp and weft weft points reach a cycle, it is called a weft cycle (or a complete weft structure).

[0027] Warp weave point: The point where the warp and weft yarns intersect is called the weave point (float). Where the warp yarn floats on top of the weft yarn, it is called the warp weave point (warp float).

[0028] Fabric structure: Fabric structure refers to the interlacing pattern of warp and weft yarns according to a certain rule, forming the weaving pattern of the fabric. Non-thermosensitive fibers: ordinary textile fibers that do not have a helical structure and do not show significant length changes in the common temperature range of -20℃ to 30℃.

[0029] Fibers with an S-shaped spiral structure: When viewed directly from the yarn, if the spiral line tends from the lower right corner to the upper left corner, it is an S-shaped or right-handed spiral.

[0030] Fibers with a Z-shaped spiral structure: When viewed directly from the yarn, if the spiral line tends from the lower left corner to the upper right corner, it is a Z-shaped or left-handed spiral.

[0031] The specific embodiments of the present invention will be described in detail below with reference to examples.

[0032] Example 1 A thermo-deformable multilayer fabric is prepared by the following steps: (1) Polyester (polyethylene terephthalate) chips are fed into a melt spinning machine at a spinning temperature of 290°C to produce polyester filaments, which are then wound onto a spinning roller. A fiber is drawn out from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.3 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.1 mm.

[0033] (2) Thermosensitive fibers and polyester fibers (30 denier) are used as weft yarns, and nylon fibers are used as warp yarns. Thermosensitive fibers account for 25% of the total mass. Figure 1 and Figure 2 The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 0.5 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is less than that in the lower fabric B. The weft float of the thermo-deformable fibers in the weft yarn of the upper fabric A is 3, while the weft float of the thermo-deformable fibers in the weft yarn of the lower fabric B is 1. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0034] Example 2 A thermo-deformable multilayer fabric is prepared by the following steps: (1) Polyester (polyethylene terephthalate) chips are fed into a melt spinning machine at a spinning temperature of 290°C to produce polyester filaments, which are then wound onto a spinning roller. A fiber is drawn off from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.1 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.15 mm.

[0035] (2) Thermosensitive fibers and polyester fibers (30 denier) are used as weft yarns, and nylon fibers are used as warp yarns. Thermosensitive fibers account for 25% of the total mass. Figure 3 and Figure 4 The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 0.5 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is equal to that in the lower fabric B. The weft float length of the thermo-deformable fibers in the weft yarn of the upper fabric A is 2, and the weft float length of the thermo-deformable fibers in the weft yarn of the lower fabric B is also 2. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0036] Example 3 A thermo-deformable multilayer fabric is prepared by the following steps: (1) Polyester (polyethylene terephthalate) chips are fed into a melt spinning machine at a spinning temperature of 290°C to produce polyester filaments, which are then wound onto a spinning roller. A fiber is drawn off from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.7 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.03 mm.

[0037] (2) Thermosensitive fibers and polyester fibers (30 denier) are used as weft yarns, and nylon fibers are used as warp yarns. The mass percentage of thermosensitive fibers is 17%. Figure 5 and Figure 6The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 1 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is less than that in the lower fabric B. The weft float length of the thermo-deformable fibers in the weft yarn of the upper fabric A is 3, while the weft float length of the thermo-deformable fibers in the weft yarn of the lower fabric B is 1. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0038] Example 4 A thermo-deformable multilayer fabric is prepared by the following steps: (1) Polyamide (PA6) chips are fed into a melt spinning machine at a spinning temperature of 270°C to produce polyamide filaments, which are then wound onto a spinning roller. A fiber is drawn out from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.1 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.2 mm.

[0039] (2) Thermosensitive fibers and polyester fibers (30 denier) are used as weft yarns, and nylon fibers are used as warp yarns. Thermosensitive fibers account for 10% of the total mass. Figure 7 and Figure 8 The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 1.5 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is less than that in the lower fabric B. The weft float of the thermo-deformable fibers in the weft yarn of the upper fabric A is 3, while the weft float of the thermo-deformable fibers in the weft yarn of the lower fabric B is 1. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0040] Example 5 A thermo-deformable multilayer fabric is prepared by the following steps: (1) Polyvinylidene fluoride (PVDF) chips are fed into a melt spinning machine at a spinning temperature of 190°C to produce PVDF filaments, which are then wound onto a spinning roller. A fiber is drawn off from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.1 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.08 mm.

[0041] (2) Thermosensitive fibers and polyester fibers (30 denier) are used as weft yarns, and nylon fibers are used as warp yarns. Thermosensitive fibers account for 10% of the total mass. Figure 9 and Figure 10 The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 1.9 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is less than that in the lower fabric B. The weft float of the thermo-deformable fibers in the weft yarn of the upper fabric A is 3, and the weft float of the thermo-deformable fibers in the weft yarn of the lower fabric B is 2. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0042] Comparative Example 1 A multi-layered fabric is obtained through the following steps: (1) Polyester (polyethylene terephthalate) chips are fed into a melt spinning machine at a spinning temperature of 290°C to produce polyester filaments, which are then wound onto a spinning roller. A fiber is drawn out from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.3 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.1 mm.

[0043] (2) Thermosensitive fiber (polyester material) and polyester fiber (30 denier) are used as weft yarns, and nylon fiber is used as warp yarns. Thermosensitive fiber accounts for 25% of the mass. Figure 11 and Figure 12The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 0.5 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is greater than that in the lower fabric B. The weft float length of the thermo-deformable fibers in the weft yarn of the upper fabric A is 2, and the weft float length of the thermo-deformable fibers in the weft yarn of the lower fabric B is 3. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0044] Comparative Example 2 A multi-layered fabric is obtained through the following steps: (1) Polyester (polyethylene terephthalate) chips are fed into a melt spinning machine at a spinning temperature of 290°C to produce polyester filaments, which are then wound onto a spinning roller. A fiber is drawn out from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.3 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.1 mm.

[0045] (2) Thermosensitive fiber (polyester material) and polyester fiber (30 denier) are used as weft yarns, and nylon fiber is used as warp yarns. Thermosensitive fiber accounts for 25% of the mass. Figure 13 and Figure 14 The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 0.5 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is greater than that in the lower fabric B. The weft float length of the thermo-deformable fibers in the weft yarn of the upper fabric A is 1, and the weft float length of the thermo-deformable fibers in the weft yarn of the lower fabric B is 2. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0046] Comparative Example 3 A multi-layered fabric is obtained through the following steps: (1) Polyester (polyethylene terephthalate) chips are fed into a melt spinning machine at a spinning temperature of 290°C to produce polyester filaments, which are then wound onto a spinning roller. A fiber is drawn out from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.3 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.1 mm.

[0047] (2) Thermosensitive fiber (polyester material) and polyester fiber (30 denier) are used as weft yarns, and nylon fiber is used as warp yarns. Thermosensitive fiber accounts for 5% of the mass. Figure 15 and Figure 16 The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 5.5 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is less than that in the lower fabric B. The weft float of the thermo-deformable fibers in the weft yarn of the upper fabric A is 3, while the weft float of the thermo-deformable fibers in the weft yarn of the lower fabric B is 1. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0048] Comparative Example 4 A multi-layered fabric is obtained through the following steps: (1) Polyester (polyethylene terephthalate) chips are fed into a melt spinning machine at a spinning temperature of 290°C to produce polyester filaments, which are then wound onto a spinning roller. A fiber is drawn out from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.3 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.1 mm.

[0049] (2) Thermosensitive fiber (polyester material) and polyester fiber (fiber fineness 20 denier) are used as weft yarns, and nylon fiber is used as warp yarns. Thermosensitive fiber accounts for 45% of the mass. Figure 17 and Figure 18The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 0 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is equal to that in the lower fabric B. The weft float length of the thermo-deformable fibers in the weft yarn of the upper fabric A is 2, and the weft float length of the thermo-deformable fibers in the weft yarn of the lower fabric B is also 2. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0050] Comparative Example 5 A multi-layered fabric is obtained through the following steps: (1) Polyester (polyethylene terephthalate) chips are fed into a melt spinning machine at a spinning temperature of 290°C to produce polyester filaments, which are then wound onto a spinning roller. A fiber is drawn out from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.3 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.1 mm.

[0051] (2) Thermosensitive fiber (polyester material) and polyester fiber (60 denier) are used as weft yarns, and nylon fiber is used as warp yarns. Thermosensitive fiber accounts for 4% of the mass. Figure 19 and Figure 20 The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 5 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is less than that in the lower fabric B. The weft float length of the thermo-deformable fibers in the weft yarn of the upper fabric A is 3, while the weft float length of the thermo-deformable fibers in the weft yarn of the lower fabric B is 1. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0052] Comparative Example 6 A multi-layered fabric is obtained through the following steps: (1) Polyester (polyethylene terephthalate) chips are fed into a melt spinning machine at a spinning temperature of 290°C to produce polyester filaments, which are then wound onto a spinning roller. A fiber is drawn out from the spinning roller, clamped, and rotated along the fiber axis at a speed of 200 rpm with a fiber tension of 4 N. The roller is fixed in place, and the fiber rotates along the axis until a spiral structure appears on the surface. The spiral fiber is wound onto a blank roller with a tension of 4 N. After all the filaments are made into spiral fibers, the spiral fibers are pulled out with a tension of 4 N for drawing and heat setting. The spiral fibers are pulled out of the roller with a tension of 4 N, passed through a drawing machine with a front ratio of 1.3 at 100°C, then through a heat setting machine at 120°C, and finally wound into a cylinder to obtain thermo-deformable fibers with a diameter of 0.1 mm.

[0053] (2) Thermosensitive fiber (polyester material) and polyester fiber (30 denier) are used as weft yarns, and nylon fiber is used as warp yarns. Thermosensitive fiber accounts for 45% of the mass. Figure 21 and Figure 22 The weave pattern is used to create two layers of fabric. The interval between adjacent thermo-deformable fibers in the weft yarn is 0 mm. The number of warp weft points on the thermo-deformable fibers in the upper fabric A is greater than that in the lower fabric B. The weft float length of the thermo-deformable fibers in the weft yarn of the upper fabric A is 1, and the weft float length of the thermo-deformable fibers in the weft yarn of the lower fabric B is 3. The upper and lower layers of thermo-deformable fiber fabric are sewn together along the warp direction, with a 4 cm distance between the two sewing lines.

[0054] The fabric parameters and evaluations in the examples are shown in Table 1, and the fabric parameters and evaluations in the comparative examples are shown in Table 2.

[0055] Table 1

[0056] Table 2

[0057] Figures 1 to 22 In the fabric diagram, 's' represents thermo-deformable fibers, and 'o' represents ordinary yarn.

[0058] like Figure 23 As shown, the multilayer thermo-deformable fabric prepared in Example 1 has a thickness of 2 mm at 30°C. After being placed in a -20°C freezer, the thickness measured is 44 mm, which is 22 times the thickness, showing a significant effect.

[0059] like Figure 24 As shown, the multilayer thermo-deformable fabric prepared in Example 2 has a thickness of 2 mm at 30°C. After being placed in a -20°C freezer, the thickness measured is 40 mm, which is 20 times the thickness, showing a significant effect.

[0060] like Figure 25As shown, the multilayer thermo-deformable fabric prepared in Example 3 has a thickness of 2 mm at 30°C. After being placed in a -20°C freezer, the thickness measured is 36 mm, which is 18 times the thickness, showing a significant effect.

[0061] like Figure 26 As shown, the multilayer thermo-deformable fabric prepared in Example 4 has a thickness of 2 mm at 30°C. After being placed in a -20°C freezer, the thickness measured is 24 mm, which is 12 times thicker, showing a significant effect.

[0062] like Figure 27 As shown, the multilayer thermo-deformable fabric prepared in Example 5 has a thickness of 2 mm at 30°C. After being placed in a -20°C freezer, the thickness measured is 16 mm, which is 8 times the thickness, showing a significant effect.

[0063] like Figure 28 As shown, the multilayer thermo-deformable fabric prepared in Comparative Example 1 has a thickness of 2 mm at 30℃. After being placed in a -20℃ freezer, the thickness measured is 5 mm, which is 2.5 times thicker, and the effect is not obvious.

[0064] like Figure 29 As shown, the multilayer thermo-deformable fabric prepared in Comparative Example 2 has a thickness of 2 mm at 30℃. After being placed in a -20℃ freezer, the thickness measured is 3 mm, which is 1.5 times thicker, and the effect is not obvious.

[0065] like Figure 30 As shown, the multilayer thermo-deformable fabric prepared in Comparative Example 3 has a thickness of 2 mm at 30℃. After being placed in a -20℃ freezer, the thickness was measured to be 2 mm, which is a doubling of the thickness, and the effect is not obvious.

[0066] like Figure 31 As shown, the multilayer thermo-deformable fabric prepared in Comparative Example 4 has a thickness of 2 mm at 30℃. After being placed in a -20℃ freezer, the thickness was measured to be 2 mm, with no increase in thickness. The thickness of the fabric did not change significantly when rolled up.

[0067] like Figure 32 As shown, the multilayer thermo-deformable fabric prepared in Comparative Example 5 has a thickness of 2 mm at 30℃. After being placed in a -20℃ freezer, the thickness was measured to be 2 mm, with no increase in thickness. The thickness of the fabric did not change significantly when rolled up.

[0068] like Figure 33 As shown, the multilayer thermo-deformable fabric prepared in Comparative Example 6 has a thickness of 2 mm at 30℃. After being placed in a -20℃ freezer, the thickness was measured to be 2 mm, with no increase in thickness. The thickness of the fabric did not change significantly when rolled up.

[0069] The specific embodiments of the present invention have been described in detail, but should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims are still within the scope of protection of this patent.

Claims

1. A thermo-deformable multilayer fabric, characterized in that, It includes an upper fabric A and a lower fabric B stacked together; both the upper fabric A and the lower fabric B contain thermo-deformable fibers and non-thermo-deformable fibers; when the temperature drops from 30°C to -20°C, a hollow structure is formed between the upper fabric A and the lower fabric B, and the thickness of the multi-layered fabric increases by at least 3 times; the thermo-deformable fibers are fibers that elongate by more than 2% along the length direction when the temperature drops from 30°C to -20°C.

2. The thermo-deformable multilayer fabric according to claim 1, characterized in that, The upper fabric A and the lower fabric B are woven fabrics; the diameter of the thermo-deformable fiber is 0.001~4mm, and the thermo-deformable fiber has a helical structure.

3. The thermo-deformable multilayer fabric according to claim 1, characterized in that, The thermo-deformable fiber content in the upper fabric A or the lower fabric B is more than 5%.

4. The thermo-deformable multilayer fabric according to claim 1, characterized in that, In the upper fabric A or the lower fabric B, the spacing between adjacent thermo-deformable fibers arranged along the warp or weft direction is 0.01~5mm.

5. The thermo-deformable multilayer fabric according to claim 1, characterized in that, Within a complete fabric weave cycle: When the thermo-deformable fiber is used as the weft yarn, the number of warp weft points on the thermo-deformable fiber in the upper fabric A is less than the number of warp weft points on the thermo-deformable fiber in the lower fabric B. When the thermo-deformable fiber is used as warp yarn, the number of weft points on the thermo-deformable fiber in the upper fabric A is less than or equal to the number of weft points on the thermo-deformable fiber in the lower fabric B.

6. The thermo-deformable multilayer fabric according to claim 1, characterized in that, Within a complete fabric weave cycle: When the thermo-deformable fiber is used as the weft yarn, the ratio of the total weft float length of the thermo-deformable fiber in the upper fabric A to the total weft float length of the thermo-deformable fiber in the lower fabric B is at least 1. When the thermo-deformable fiber is used as warp yarn, the ratio of the total warp float length of the thermo-deformable fiber in the upper fabric A to the total warp float length of the thermo-deformable fiber in the lower fabric B is at least 1.

7. The thermo-deformable multilayer fabric according to claim 1, characterized in that, When the thermo-deformable fiber is used as weft yarn in each fabric weave cycle, the weft float length of the thermo-deformable fiber in the upper fabric A is ≥2, and the weft float length of the thermo-deformable fiber in the lower fabric B is ≤2. When the thermo-deformable fiber is used as warp yarn, the warp float length of the thermo-deformable fiber in the upper fabric A is ≥2, and the warp float length of the thermo-deformable fiber in the lower fabric B is ≤2.

8. The thermo-deformable multilayer fabric according to claim 1, characterized in that, When the temperature drops from 30°C to -20°C, the thickness of the multilayer fabric increases by at least 20 times.

9. The thermo-deformable multilayer fabric according to claim 1, characterized in that, It also includes fabric layer C, which forms a hollow structure with the lower fabric layer B when the temperature drops from 30°C to -20°C.

10. A thermo-deformable product, characterized in that, It is made from the thermo-deformable multilayer fabric as described in any one of claims 1 to 9.

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