Preparation method of clothing fabric with breathable and warm-keeping properties

Abstract

The invention belongs to the technical field of textile, and discloses a preparation method of a garment fabric with breathable and warm-keeping performance, the preparation method is characterized in that dynamic polyester profiled yarns are spun and woven to obtain the garment fabric with breathable and warm-keeping performance, the monofilament cross section shape of the dynamic polyester profiled yarns periodically changes along the length direction, and the monofilament cross section shape of the dynamic polyester profiled yarns periodically changes along the length direction. And the sections of the monofilaments in each period are flat and triangular in sequence. The polyester dynamic profiled yarn adopted by the invention has a periodically changing monofilament cross section, and the fabric prepared from the polyester dynamic profiled yarn can construct a micro alternating channel of a breathable area and a warm keeping area in the same plane, so that the prepared fabric has breathable and warm keeping properties.

Description

Technical Field

[0001] This invention belongs to the field of textile technology and relates to a method for preparing an apparel fabric that combines breathability and warmth. Background Technology

[0002] Traditional polyester fabrics typically use polyester fibers with a circular cross-section, and fabrics woven from these fibers often struggle to balance breathability and warmth.

[0003] Due to the unique structure of profiled yarns, fabrics woven from them can effectively improve breathability and warmth. However, current technologies for enhancing fabric performance often employ single-profiled yarn solutions, resulting in overly focused functionality. While blending multiple profiled yarns is essentially a static mixture, it compromises breathability and warmth, failing to achieve a balance. Some fabrics claiming dual functionality rely on multi-layered composite structures, which not only remain bulky but also suffer from the problem of easy layer separation.

[0004] Patent CN220034832U discloses a warm and breathable knitted fabric. This fabric is woven from a first composite yarn containing cashmere yarn, a second composite yarn containing magnetic health-promoting acrylic yarn, and spandex filament yarn. The first composite yarn includes a core yarn and a wrapping yarn. The core yarn is a composite twisted yarn, which is formed by twisting hollow polyester filaments and irregularly shaped cross-section polyester filaments together, achieving functions such as skin-friendliness, breathability, and warmth. However, the warmth of this fabric mainly relies on the cashmere material, which can easily lead to a heavy fabric. Furthermore, its breathability is not optimized by the structure and is affected by the moisture absorption of the fibers. In addition, the multi-layer warp-knitted structure may increase the heaviness and affect the lightness of the garment.

[0005] Patent application CN117488468A discloses a warm and breathable close-fitting clothing fabric and its manufacturing process. This fabric is made by spinning PET and PBT fibers with a cross-shaped hollow cross section, followed by weaving and dyeing. It utilizes the cross-shaped grooves to wick away moisture and drain water, while simultaneously storing heat through the hollow fiber structure, attempting to balance breathability, quick-drying, and warmth. However, the fabric's warmth retention relies solely on the hollow fiber structure for heat storage, failing to achieve efficient warmth retention through structural design. Its effectiveness is limited in scenarios requiring strong warmth retention, and it does not solve the balance between high breathability and high warmth retention. Furthermore, although the fabric uses bi-component profiled yarns, it is essentially a statically spun yarn without functional zoning. There is still a compromise between breathability (via the cross-shaped grooves) and warmth retention (via the hollow heat storage), failing to achieve a perfect balance.

[0006] Therefore, a method for preparing clothing fabrics that combine breathability and warmth is needed to solve the above problems, which is of great significance. Summary of the Invention

[0007] The purpose of this invention is to solve the problems existing in the prior art and provide a method for preparing a clothing fabric that combines breathability and warmth.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0009] A method for preparing an apparel fabric that combines breathability and warmth, wherein polyester dynamic profiled yarn is spun and woven to obtain an apparel fabric that combines breathability and warmth.

[0010] The cross-sectional shape of the single filament of the dynamic profiled polyester yarn changes periodically along its length, with the cross-sectional shape of the single filament in each cycle being a flat shape and a triangle, respectively.

[0011] As a preferred technical solution:

[0012] In the above-described method for preparing an apparel fabric that combines breathability and warmth, the ratio of the lengths of the flat cross-section and the triangular cross-section in each cycle along the length direction of the polyester dynamic profiled yarn is 1~2.5:1~2.5.

[0013] The above-described method for preparing an apparel fabric that combines breathability and warmth has the following characteristics: the breathability of the breathable area is ≥600mm / s, and the warmth retention coefficient is ≤0.5clo; the breathability of the warm area is ≤200mm / s, and the warmth retention coefficient is ≥0.9clo.

[0014] The preparation method of the apparel fabric with both breathability and warmth as described above, the preparation method of the polyester dynamic profile yarn is as follows: the polyester melt sprayed from the spinneret is first cooled to 200~240℃ in the spinning tunnel to obtain a pre-formed monofilament. Then, cold air at 0~20℃ is periodically applied to the pre-formed monofilament in the spinning tunnel to reduce the temperature of the impacted area to 70~80℃ within 20~50ms. After that, the monofilament coming out of the spinning tunnel is successively bundled, stretched and shaped, oiled and wound to obtain the polyester dynamic profile yarn.

[0015] The application of cold air impact is achieved through a single-filament cold air dynamic irregular nozzle system installed in the spinning tunnel. The entire single-filament cold air dynamic irregular nozzle system is installed in the spinning tunnel by a bracket.

[0016] The monofilament cold air dynamic irregular nozzle system includes a nozzle module and a control system. The control system controls the position, time, and interval of nozzle opening / closing according to a preset program. The control system includes a solenoid valve, a nozzle switch controller, and a cold air pressure regulating valve. The nozzle module is composed of multiple nozzles, each nozzle is used to apply cold air impact to a monofilament. Each nozzle has 4 or 6 air outlets evenly distributed in a ring, and the air outlets face the circumference of the monofilament. A solenoid valve is installed on the pipe corresponding to each air outlet. All solenoid valves are connected to the nozzle switch controller via cables, and the nozzle switch controller controls the opening and closing of the solenoid valves. All nozzles are connected to a main air inlet pipe via air pipes. A cold air pressure regulating valve is installed at the inlet of the main air inlet pipe to regulate the nozzle outlet air temperature and pressure.

[0017] Applying cold air impact periodically means first opening two opposite air outlets to simultaneously impact the monofilament with cold air for 20-50 ms, then switching to three air outlets to simultaneously impact the monofilament with cold air for 20-50 ms, and repeating the cold air impact process alternately; when three air outlets simultaneously impact the monofilament with cold air, the angle between the air outlet directions of two adjacent air outlets shall not be less than 90°.

[0018] The method for preparing an apparel fabric that combines breathability and warmth, as described above, involves a spinneret orifice diameter of 0.05~0.3mm; a polyester melt temperature of 280~300℃; and a spinneret speed of 10~18m / min.

[0019] The method for preparing a breathable and warm clothing fabric as described above involves a nozzle with an air outlet diameter of 0.05-0.2 mm and a nozzle with an inlet diameter of 0.06-0.6 mm for allowing monofilaments to pass through.

[0020] The preparation method of the clothing fabric with both breathability and warmth as described above uses ring-blowing cooling or side-blowing cooling for initial cooling, with a cooling air temperature of 20~30℃ and a cooling air velocity of 0.8~1.5m / s.

[0021] In the preparation method of the above-mentioned apparel fabric that combines breathability and warmth, the nozzle module is 30-80cm high from the circumferential or side-blowing area.

[0022] The method for preparing an apparel fabric that combines breathability and warmth, as described above, wherein the weight of the apparel fabric with both breathability and warmth is 100~150 g / m². 2 .

[0023] Invention principle:

[0024] Addressing the issues of existing polyester apparel fabrics' difficulty in balancing breathability and warmth, and the weight and discomfort associated with composite fabrics, this invention utilizes dynamically profiled polyester yarns with periodically varying cross-sections (alternating between triangular and flat cross-sections) for spinning and weaving. This results in apparel fabrics that combine excellent breathability and warmth. Specifically, by designing an alternating "expansion-contraction" structure on individual fibers (the breathable section uses a triangular cross-section to create a higher porosity, while the warming section uses a flat cross-section to create a lower porosity), the fabric constructs alternating microscopic channels for "breathable zones" and "warming zones" within the same plane. This structure achieves a dynamic balance of functions: the breathable section ensures airflow, while the warming section effectively prevents heat loss. Without relying on multiple layers, this single-layer, lightweight fabric achieves a balance between breathability and warmth, significantly improving wearing comfort.

[0025] Beneficial effects:

[0026] The polyester dynamic profiled yarn used in this invention has a periodically changing monofilament cross-section. It is designed with an alternating "expansion-contraction" structure on a single fiber. Fabrics made from it can construct microscopic alternating channels of "breathable zone" and "warm zone" in the same plane. This structure achieves a dynamic balance of functions. The breathable section ensures air circulation, while the warm zone effectively isolates heat loss. It does not rely on multi-layer composites and achieves a balance between breathability and warmth in a single-layer lightweight fabric, significantly improving wearing comfort. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0028] To ensure that the performance of the substances used in each embodiment is fully disclosed, the manufacturers and brands of the substances are specified. Other products from manufacturers and brands that conform to the limitations of this invention are also feasible.

[0029] The testing methods for the relevant performance indicators in the following embodiments are as follows:

[0030] Air permeability: The breathable and warm clothing fabrics prepared in each embodiment were used as samples. Then, following GB / T 5453-2025 "Textiles - Determination of Air Permeability of Fabrics" standard, the air permeability of the samples was measured after equilibration at 20℃ and 65% relative humidity for 24 hours. The sample area was 20 cm². 2 The pressure difference is 100 Pa.

[0031] Thermal insulation coefficient: The breathable and thermal insulation fabrics prepared in each embodiment were used as samples. Then, referring to GB / T 11048-2018 "Determination of thermal resistance and moisture resistance of textiles under steady-state conditions for physiological comfort", the thermal resistance of the breathable area and the breathable area of ​​the sample were tested after equilibration for 24 hours at a temperature of 20℃ and a relative humidity of 65%. The thermal insulation coefficient of the breathable area and the breathable area were then calculated by the formula "thermal insulation coefficient = 1 / thermal resistance". During the test, the test plate temperature was set to 33℃, the ambient temperature to 20℃, the ambient relative humidity to 65%, and the airflow velocity to ≤0.2m / s. The thermal resistance data were recorded after the test system reached thermal steady state (heat flux density change ≤5% / h).

[0032] Example 1

[0033] A method for preparing an apparel fabric that combines breathability and warmth retention, comprising the following steps:

[0034] (1) After the polyester chips (semi-dull polyester chips, manufactured by Jiangsu Hengke New Materials Co., Ltd., batch number MS01) are melted, the polyester melt is sprayed out through a spinneret and then pre-cooled to 240°C in the spinning tunnel by ring blowing cooling to obtain a pre-formed monofilament; wherein, the spinneret hole diameter on the spinneret is 0.3mm, the spinning speed is 18m / min, the temperature of the polyester melt is 300°C, the cooling air temperature is 30°C, and the cooling air velocity is 1.5m / s;

[0035] (2) In the spinning tunnel, the initially formed monofilament is periodically subjected to 0°C cold air impact by a monofilament cold air dynamic shaped nozzle system installed in the spinning tunnel, so that the temperature of the impacted area drops to 70°C; wherein, the cold air impact pressure is 0.5MPa, and the monofilament cold air dynamic shaped nozzle system includes a nozzle module and a control system.

[0036] The control system includes solenoid valves, nozzle switch controllers, and cold air pressure regulating valves;

[0037] The nozzle module consists of three nozzles. Each nozzle is used to apply cold air to a single filament. Each nozzle has four air outlets evenly distributed in a ring, with the air outlets facing the circumference of the single filament. A solenoid valve is installed on the pipe corresponding to each air outlet. All solenoid valves are connected to the nozzle switch controller via cables. All nozzles are connected to the main air inlet pipe via air pipes. A cold air pressure regulating valve is installed at the inlet of the main air inlet pipe.

[0038] The periodic application of cold air impact refers to first opening two air outlets to simultaneously impact the monofilament with cold air from opposite sides for 20ms, then switching to three air outlets evenly arranged along the circumference to simultaneously impact the monofilament with cold air for 50ms, and repeating the cold air impact process alternately; when the three air outlets simultaneously impact the monofilament with cold air, the angle between the air outlet directions of two adjacent air outlets is 90°.

[0039] The nozzle module is 30cm above the ring blowing area, the outlet diameter is 0.1mm, and the inlet diameter of the nozzle for monofilament passage is 0.6mm.

[0040] (3) The monofilaments coming out of the spinning tunnel are successively bundled, stretched and shaped, oiled and wound to produce polyester dynamic profiled yarn; wherein the draw ratio is 50 times;

[0041] The cross-sectional shape of the obtained polyester dynamic profiled yarn changes periodically along the length direction. The cross-sectional shape of the yarn in each cycle is flat and triangular, and the ratio of the lengths of the flat and triangular cross-sections in each cycle is 1:2.5.

[0042] (4) Using circular knitting technology, the polyester dynamic profile yarn obtained above is used as the weft yarn and the polyester low elastic yarn (polyester filament, manufactured by Jiangsu Hengke New Material Co., Ltd., specification is 150D / 96F semi-glossy DTY) is used as the warp yarn to spin and weave to obtain a clothing fabric with both breathability and warmth; among them, the weft yarn is a periodic alternation of "flat segment - triangular segment", which will allow the fabric to naturally form a "breathable zone - warm zone" with corresponding functions.

[0043] The final fabric, which combines breathability and warmth, has a weight of 100 g / m². 2 The breathable zone has an air permeability of 600 mm / s and a thermal insulation coefficient of 0.5 clo; the thermal insulation zone has an air permeability of 200 mm / s and a thermal insulation coefficient of 0.9 clo.

[0044] Example 2

[0045] A method for preparing an apparel fabric that combines breathability and warmth retention, comprising the following steps:

[0046] (1) After the polyester chips (semi-dull polyester chips, manufactured by Jiangsu Hengke New Materials Co., Ltd., batch number MS01) are melted, the polyester melt is sprayed out through a spinneret and then the side-blown cooling is used to initially cool it to 220°C in the spinning tunnel to obtain a pre-formed monofilament; wherein, the spinneret hole diameter on the spinneret is 0.2 mm, the spinning speed is 12 m / min, the temperature of the polyester melt is 290°C, the cooling air temperature is 27°C, and the cooling air velocity is 1.3 m / s;

[0047] (2) In the spinning tunnel, the initially formed monofilament is periodically subjected to cold air impact at 10°C through the monofilament cold air dynamic irregular nozzle system installed in the spinning tunnel, so that the temperature of the impacted area drops to 75°C; wherein, the cold air impact pressure is 0.4MPa, and the monofilament cold air dynamic irregular nozzle system includes nozzle module and control system.

[0048] The control system includes solenoid valves, nozzle switch controllers, and cold air pressure regulating valves;

[0049] The nozzle module consists of 9 nozzles. Each nozzle is used to apply cold air to a single filament. Each nozzle has 6 air outlets evenly distributed in a ring, with the air outlets facing the circumference of the single filament. A solenoid valve is installed on the pipe corresponding to each air outlet. All solenoid valves are connected to the nozzle switch controller via cables. All nozzles are connected to the main air inlet pipe via air pipes. A cold air pressure regulating valve is installed at the inlet of the main air inlet pipe.

[0050] The periodic application of cold air impact refers to first opening two air outlets to simultaneously impact the monofilament with cold air from opposite sides for 25ms, then switching to three air outlets evenly arranged along the circumference to simultaneously impact the monofilament with cold air for 35ms, and repeating the cold air impact process alternately; when the three air outlets simultaneously impact the monofilament with cold air, the angle between the air outlet directions of two adjacent air outlets is 120°.

[0051] The nozzle module is 50cm above the side blowing area, the air outlet has a diameter of 0.2mm, and the filament inlet of the nozzle for monofilament passage has a diameter of 0.3mm.

[0052] (3) The monofilaments coming out of the spinning tunnel are successively bundled, stretched and shaped, oiled and wound to produce polyester dynamic profiled yarn; wherein the draw ratio is 40 times;

[0053] The cross-sectional shape of the obtained polyester dynamic profiled yarn changes periodically along the length direction. The cross-sectional shape of the yarn in each cycle is flat and triangular, and the ratio of the lengths of the flat and triangular cross-sections in each cycle is 1:1.4.

[0054] (4) Using circular knitting technology, the polyester dynamic profile yarn obtained above is used as the weft yarn and the polyester low elastic yarn (polyester filament, manufactured by Jiangsu Hengke New Material Co., Ltd., specification is 120D / 96F semi-glossy DTY) is used as the warp yarn to spin and weave to obtain a clothing fabric with both breathability and warmth; among them, the weft yarn is a periodic alternation of "flat segment - triangular segment", which will allow the fabric to naturally form a "breathable zone - warm zone" with corresponding functions.

[0055] The final fabric, which combines breathability and warmth, has a weight of 115 g / m². 2The breathable zone has an air permeability of 650 mm / s and a thermal insulation coefficient of 0.45 clo; the thermal insulation zone has an air permeability of 180 mm / s and a thermal insulation coefficient of 1 clo.

[0056] Example 3

[0057] A method for preparing an apparel fabric that combines breathability and warmth retention, comprising the following steps:

[0058] (1) After the polyester chips (semi-dull polyester chips, manufactured by Jiangsu Hengke New Materials Co., Ltd., batch number MS01) are melted, the polyester melt is sprayed out through a spinneret and then pre-cooled to 210°C in the spinning tunnel by ring blowing cooling to obtain a pre-formed monofilament; wherein, the spinneret hole diameter on the spinneret is 0.1 mm, the spinning speed is 15 m / min, the temperature of the polyester melt is 285°C, the cooling air temperature is 25°C, and the cooling air velocity is 1.1 m / s;

[0059] (2) In the spinning tunnel, the initially formed monofilament is periodically subjected to cold air impact at 20°C through a monofilament cold air dynamic shaped nozzle system installed in the spinning tunnel, so that the temperature of the impacted area drops to 80°C; wherein, the cold air impact pressure is 0.3MPa, and the monofilament cold air dynamic shaped nozzle system includes a nozzle module and a control system.

[0060] The control system includes solenoid valves, nozzle switch controllers, and cold air pressure regulating valves;

[0061] The nozzle module consists of 12 nozzles. Each nozzle is used to apply cold air to a single filament. Each nozzle has four air outlets that are evenly distributed in a ring and face the circumference of the single filament. A solenoid valve is installed on the pipe corresponding to each air outlet. All solenoid valves are connected to the nozzle switch controller via cables. All nozzles are connected to the main air inlet pipe via air pipes. A cold air pressure regulating valve is installed at the inlet of the main air inlet pipe.

[0062] The periodic application of cold air impact refers to first opening two air outlets to simultaneously impact the monofilament with cold air from opposite sides for 30ms, then switching to three air outlets evenly arranged along the circumference to simultaneously impact the monofilament with cold air for 30ms, and repeating the cold air impact process alternately; when the three air outlets simultaneously impact the monofilament with cold air, the angle between the air outlet directions of two adjacent air outlets is 150°.

[0063] The nozzle module is 70cm above the ring blowing area, the air outlet has a diameter of 0.1mm, and the filament inlet of the nozzle for monofilament passage has a diameter of 0.15mm.

[0064] (3) The monofilaments coming out of the spinning tunnel are successively bundled, stretched and shaped, oiled and wound to produce polyester dynamic profiled yarn; wherein the draw ratio is 30 times;

[0065] The cross-sectional shape of the obtained polyester dynamic profiled yarn changes periodically along the length direction. The cross-sectional shape of the yarn in each cycle is flat and triangular, and the ratio of the length of the flat cross-section to the length of the triangular cross-section in each cycle is 1:1.

[0066] (4) Using circular knitting technology, the polyester dynamic profile yarn obtained above is used as the weft yarn and the polyester low elastic yarn (polyester filament, manufactured by Jiangsu Hengke New Material Co., Ltd., specification is 100D / 96F semi-glossy DTY) is used as the warp yarn to spin and weave to obtain a clothing fabric with both breathability and warmth; among them, the weft yarn is a periodic alternation of "flat segment - triangular segment", which will allow the fabric to naturally form a "breathable zone - warm zone" with corresponding functions.

[0067] The final fabric, which combines breathability and warmth, has a weight of 130 g / m². 2 The breathable zone has an air permeability of 700 mm / s and a thermal insulation coefficient of 0.4 clo; the thermal insulation zone has an air permeability of 150 mm / s and a thermal insulation coefficient of 1.1 clo.

[0068] Example 4

[0069] A method for preparing an apparel fabric that combines breathability and warmth retention, comprising the following steps:

[0070] (1) After the polyester chips (semi-dull polyester chips, manufactured by Jiangsu Hengke New Materials Co., Ltd., batch number MS01) are melted, the polyester melt is sprayed out through a spinneret and then the side-blown cooling is used to initially cool it to 200°C in the spinning tunnel to obtain a pre-formed monofilament; wherein, the spinneret hole diameter on the spinneret is 0.05mm, the spinning speed is 10m / min, the temperature of the polyester melt is 280°C, the cooling air temperature is 20°C, and the cooling air velocity is 0.8m / s;

[0071] (2) In the spinning tunnel, the initially formed monofilament is periodically subjected to cold air impact at 20°C through a monofilament cold air dynamic shaped nozzle system installed in the spinning tunnel, so that the temperature of the impacted area drops to 70°C; wherein, the cold air impact pressure is 0.2MPa, and the monofilament cold air dynamic shaped nozzle system includes a nozzle module and a control system.

[0072] The control system includes solenoid valves, nozzle switch controllers, and cold air pressure regulating valves;

[0073] The nozzle module consists of 36 nozzles, each of which is used to apply cold air to a single filament. Each nozzle has 6 air outlets evenly distributed in a ring, with the air outlets facing the circumference of the single filament. A solenoid valve is installed on the pipe corresponding to each air outlet, and all solenoid valves are connected to the nozzle switch controller via cables. All nozzles are connected to the main air inlet pipe via air pipes, and a cold air pressure regulating valve is installed at the inlet of the main air inlet pipe.

[0074] The periodic application of cold air impact refers to first opening two air outlets to simultaneously impact the monofilament with cold air from opposite sides for 35ms, then switching to three air outlets evenly arranged along the circumference to simultaneously impact the monofilament with cold air for 25ms, and repeating the cold air impact process alternately; when the three air outlets simultaneously impact the monofilament with cold air, the angle between the air outlet directions of two adjacent air outlets is 180°.

[0075] The nozzle module is 80cm above the side blowing area, the air outlet has a diameter of 0.05mm, and the filament inlet of the nozzle for monofilament passage has a diameter of 0.06mm.

[0076] (3) The monofilaments coming out of the spinning tunnel are successively bundled, stretched and shaped, oiled and wound to produce polyester dynamic profiled yarn; wherein the draw ratio is 20 times;

[0077] The cross-sectional shape of the obtained polyester dynamic profiled yarn changes periodically along the length direction. The cross-sectional shape of the single filament in each cycle is successively flat and triangular. The ratio of the lengths of the flat cross-section and the triangular cross-section in each cycle is 1.4:1.

[0078] (4) Using circular knitting technology, the polyester dynamic profile yarn obtained above is used as the weft yarn and the polyester low elastic yarn (polyester filament, manufactured by Jiangsu Hengke New Material Co., Ltd., specification is 100D / 96F semi-glossy DTY) is used as the warp yarn to spin and weave to obtain a clothing fabric with both breathability and warmth; among them, the weft yarn is a periodic alternation of "flat segment - triangular segment", which will allow the fabric to naturally form a "breathable zone - warm zone" with corresponding functions.

[0079] The final fabric, which combines breathability and warmth, has a weight of 140 g / m². 2 The breathable zone has an air permeability of 750 mm / s and a thermal insulation coefficient of 0.35 clo; the thermal insulation zone has an air permeability of 120 mm / s and a thermal insulation coefficient of 1.2 clo.

[0080] Example 5

[0081] A method for preparing an apparel fabric that combines breathability and warmth retention, comprising the following steps:

[0082] (1) After the polyester chips (semi-dull polyester chips, manufactured by Jiangsu Hengke New Materials Co., Ltd., batch number MS01) are melted, the polyester melt is sprayed out through a spinneret and then the side-blown cooling is used to initially cool it to 200°C in the spinning tunnel to obtain a pre-formed monofilament; wherein, the spinneret hole diameter on the spinneret is 0.05mm, the spinning speed is 10m / min, the temperature of the polyester melt is 280°C, the cooling air temperature is 20°C, and the cooling air velocity is 0.8m / s;

[0083] (2) In the spinning tunnel, the initially formed monofilament is periodically subjected to cold air impact at 20°C through a monofilament cold air dynamic shaped nozzle system installed in the spinning tunnel, so that the temperature of the impacted area drops to 70°C; wherein, the cold air impact pressure is 0.2MPa, and the monofilament cold air dynamic shaped nozzle system includes a nozzle module and a control system.

[0084] The control system includes solenoid valves, nozzle switch controllers, and cold air pressure regulating valves;

[0085] The nozzle module consists of 36 nozzles. Each nozzle is used to apply cold air to a single filament. Each nozzle has four air outlets that are evenly distributed in a ring and face the circumference of the single filament. A solenoid valve is installed on the pipe corresponding to each air outlet. All solenoid valves are connected to the nozzle switch controller via cables. All nozzles are connected to the main air inlet pipe via air pipes. A cold air pressure regulating valve is installed at the inlet of the main air inlet pipe.

[0086] The periodic application of cold air impact refers to first opening two air outlets to simultaneously impact the monofilament with cold air from opposite sides for 50ms, then switching to three air outlets evenly arranged along the circumference to simultaneously impact the monofilament with cold air for 20ms, and repeating the cold air impact process alternately; when the three air outlets simultaneously impact the monofilament with cold air, the angle between the air outlet directions of two adjacent air outlets is 120°.

[0087] The nozzle module is 80cm above the side blowing area, the air outlet has a diameter of 0.05mm, and the filament inlet of the nozzle for monofilament passage has a diameter of 0.06mm.

[0088] (3) The monofilaments coming out of the spinning tunnel are successively bundled, stretched and shaped, oiled and wound to produce polyester dynamic profiled yarn; wherein the draw ratio is 20 times;

[0089] The cross-sectional shape of the obtained polyester dynamic profiled yarn changes periodically along the length direction. The cross-sectional shape of the single filament in each cycle is successively flat and triangular. The ratio of the lengths of the flat cross-section and the triangular cross-section in each cycle is 2.5:1.

[0090] (4) Using circular knitting technology, the polyester dynamic profile yarn obtained above is used as the weft yarn and the polyester low elastic yarn (polyester filament, manufactured by Jiangsu Hengke New Material Co., Ltd., specification is 100D / 96F semi-glossy DTY) is used as the warp yarn to spin and weave to obtain a clothing fabric with both breathability and warmth; among them, the weft yarn is a periodic alternation of "flat segment - triangular segment", which will allow the fabric to naturally form a "breathable zone - warm zone" with corresponding functions.

[0091] The final fabric, which combines breathability and warmth, has a weight of 150 g / m². 2 The breathable zone has an air permeability of 800 mm / s and a thermal insulation coefficient of 0.3clo; the thermal insulation zone has an air permeability of 100 mm / s and a thermal insulation coefficient of 1.3clo.

Claims

1. A method for preparing a garment fabric that combines breathability and warmth retention, characterized in that: Polyester dynamic profiled yarn is spun and woven to obtain clothing fabrics that combine breathability and warmth. The cross-sectional shape of the single filament of the dynamic profiled polyester yarn changes periodically along its length, with the cross-sectional shape of the single filament in each cycle being a flat shape and a triangle, respectively.

2. The method for preparing a garment fabric with both breathability and warmth retention properties according to claim 1, characterized in that, In each cycle along the length direction of the polyester dynamic profiled yarn, the ratio of the lengths corresponding to the flat cross-section and the triangular cross-section is 1~2.5:1~2.

5.

3. The method for preparing a garment fabric with both breathability and warmth retention properties according to claim 2, characterized in that, The breathable zone has an air permeability of ≥600mm / s and a thermal insulation coefficient of ≤0.5clo; the thermal insulation zone has an air permeability of ≤200mm / s and a thermal insulation coefficient of ≥0.9clo.

4. A method for preparing a garment fabric with both breathability and warmth retention properties according to claim 1 or 2, characterized in that, The preparation method of polyester dynamic profiled yarn is as follows: the polyester melt ejected from the spinneret is first cooled to 200~240℃ in the spinning tunnel to obtain a preliminary shaped monofilament. Then, cold air at 0~20℃ is periodically applied to the preliminary shaped monofilament in the spinning tunnel to reduce the temperature of the impacted area to 70~80℃ within 20~50ms. After that, the monofilament coming out of the spinning tunnel is successively bundled, stretched and shaped, oiled and wound to obtain polyester dynamic profiled yarn. The application of cold air impact is achieved through a single-filament cold air dynamic irregular nozzle system installed in the spinning channel; The monofilament cold air dynamic irregular nozzle system includes a nozzle module and a control system. The control system includes a solenoid valve, a nozzle switch controller, and a cold air pressure regulating valve. The nozzle module is composed of multiple nozzles, each of which is used to apply cold air impact to a monofilament. Each nozzle has 4 or 6 air outlets evenly distributed in a ring, and the air outlets face the circumference of the monofilament. A solenoid valve is installed on the pipe corresponding to each air outlet, and all solenoid valves are connected to the nozzle switch controller via cables. All nozzles are connected to a main air inlet pipe via air pipes, and a cold air pressure regulating valve is installed at the inlet of the main air inlet pipe. Applying cold air impact periodically means first opening two opposite air outlets to simultaneously impact the monofilament with cold air for 20-50 ms, then switching to three air outlets to simultaneously impact the monofilament with cold air for 20-50 ms, and repeating the cold air impact process alternately; when three air outlets simultaneously impact the monofilament with cold air, the angle between the air outlet directions of two adjacent air outlets shall not be less than 90°.

5. The method for preparing a garment fabric with both breathability and warmth retention properties according to claim 4, characterized in that, The diameter of the spinneret orifice is 0.05~0.3mm; the temperature of the polyester melt is 280~300℃; and the spinning speed is 10~18m / min.

6. The method for preparing a garment fabric with both breathability and warmth retention properties according to claim 5, characterized in that, The diameter of the air outlet hole on each nozzle is 0.05~0.2mm, and the diameter of the wire inlet hole of the nozzle for the monofilament to pass through is 0.06~0.6mm.

7. The method for preparing a garment fabric with both breathability and warmth retention properties according to claim 6, characterized in that, Initial cooling uses annular or side-blowing cooling with a cooling air temperature of 20-30℃ and a cooling air velocity of 0.8-1.5m / s.

8. The method for preparing a garment fabric with both breathability and warmth retention properties according to claim 7, characterized in that, The nozzle module is 30-80cm high from the annular or side-blowing area.

9. The method for preparing a garment fabric with both breathability and warmth retention properties according to claim 1, characterized in that, The weight of clothing fabric that combines breathability and warmth is 100~150g / m². 2 .