Temperature-control four-season quilt filling flocculus with layered multi-stage structure

Abstract

The invention discloses a temperature-control four-season quilt filling flocculus with a layered multi-stage structure, which comprises five layers of fiber nets with gradient change of volume density, the five layers of fiber nets are a compact fiber surface layer, a soft fiber upper layer, a fluffy fiber middle layer, a soft fiber lower layer and a compact fiber inner layer in sequence, and each layer contains far infrared heating fiber; the gram weight range of the filling flocculus is 100-140 g / m < 2 >, the thickness is 3-6 cm, the thermal resistance value is 0.04-0.06 W / (m.k), the wind resistance is 0.03-0.08 KPa.s / m, and the moisture permeability is 600-1000 g / m < 2 > / d. According to the warm-keeping fabric, the passive warm-keeping effect of a layered multi-stage fluffy structure and the active warm-keeping effect of far infrared heating fibers are combined, the warm-keeping fabric has better temperature-control warm-keeping performance, efficient air and moisture permeability is ensured, meanwhile, fluffy layer flocculus can be effectively prevented from drilling down, and the problem that flocculus filled with traditional natural fibers such as cotton and down cannot be washed by a machine can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of textiles, and particularly relates to a temperature-controlled four-season quilt filling floc with a hierarchical multi-stage structure. Background Art

[0002] Natural materials such as down, cotton, and wool are common heat-insulating materials, which are widely popular due to their good heat preservation and breathability. However, these materials will absorb moisture in a humid environment, resulting in a decrease in heat preservation. At the same time, down fibers are prone to feather leakage and uneven distribution during use. In comparison, synthetic fibers such as polyester fiber, nylon fiber, and polypropylene fiber have the advantages of light weight, hydrophobicity, easy cleaning, and quick drying, and have gradually become an important choice for heat-insulating materials. However, its stacked pore structure is single, and heat loss is only prevented by inhibiting heat conduction, resulting in difficulty in further improving its heat preservation performance.

[0003] To solve the above problems, some relevant technical personnel have conducted some research.

[0004] The utility model patent with the publication number CN210856543U discloses "An efficient heat-preserving aerogel fiber floc", which prepares a heat-preserving floc by disorderly mixing aerogel fibers, heat-insulating fibers, and resilient support fibers. The heat-preserving aerogel fiber floc provided by this technology has high fluffiness and high breathability. However, the structure of the whole floc is single, and it is difficult to give full play to the advantages of various fibers, resulting in poor overall performance of the floc. The patent with the publication number CN109267231A discloses "A multi-layered and high-density heat-preserving floc and its preparation method". The heat-preserving floc is prepared by uniformly mixing ultrafine denier fibers, low-melting-point fibers, and ordinary fibers, and then carding and laying them into a web. The heat-preserving floc prepared by this technical solution has a high density and can effectively prevent heat diffusion, but its air permeability and moisture permeability are poor, and it feels hard and has poor comfort.

[0005] The invention patent with the publication number CN111485329B discloses "A nanofiber floc with a sandwich structure and its preparation method", and the utility model patent with the publication number CN215757891U discloses "A three-layer composite structure wool floc". Both of them obtain a fiber floc with a sandwich structure by constructing a dense fiber surface layer, a fluffy middle layer, and a dense fiber lower layer, so as to improve the heat preservation performance of the floc. However, to prevent the middle-layer floc from feather leakage, the thickness of the upper and lower dense fiber layers is relatively thick, resulting in a decrease in the air permeability and moisture permeability of the floc and a hard feel; moreover, the wool floc has the problem of easy shrinkage during machine washing. Summary of the Invention

[0006] To overcome the problems existing in the prior art, the present application provides a temperature-controlled four-season quilt filling flake with a hierarchical multi-level structure to solve the problems of poor air permeability and moisture permeability, hard hand feeling, and easy shrinkage during machine washing of the filling flake in the prior art.

[0007] To achieve the above object, the technical solution adopted by the present invention is: a temperature-controlled four-season quilt filling flake with a hierarchical multi-level structure, the structure of the filling flake includes five fiber webs with a gradient change in volume density, which are a dense fiber surface layer, a soft fiber upper layer, a fluffy fiber middle layer, a soft fiber lower layer, and a dense fiber inner layer in sequence. The dense fiber surface layer and the dense fiber inner layer are symmetrically arranged, the soft fiber upper layer and the soft fiber lower layer are symmetrically arranged, and the dense fiber surface layer, the soft fiber upper layer, the fluffy fiber middle layer, the soft fiber lower layer, and the dense fiber inner layer all contain far-infrared heating fibers; The gram weight range of the filling flake is 100~140g / m 2 , the thickness is 3~6cm, the thermal resistance value is 0.04~0.06W / (m·k), the air resistance is 0.03~0.08KPa·s / m, and the moisture permeability rate is 600~1000g / m 2 / d.

[0008] Further, the dense fiber surface layer and the dense fiber inner layer have the same components and functions, and their gram weight is 200~800g / m 2 , the thickness is 0.1~1mm, and the fiber components include far-infrared heating fibers, ultra-fine fibers, two-dimensional crimped fibers, three-dimensional crimped hollow fibers, and hot-melt fibers.

[0009] Further, the soft fiber upper layer and the soft fiber lower layer have the same components and structures, and their density is 120~200g / m 2 , the thickness is 1~20mm, and the fiber components include three-dimensional crimped hollow fibers, far-infrared heating fibers, two-dimensional crimped fibers, hot-melt fibers, and ultra-fine fibers.

[0010] Further, the volume density of the fluffy fiber middle layer is 30~120g / m 2 , the thickness is 20~50mm, and the fiber components include far-infrared heating fibers, three-dimensional crimped hollow fibers, two-dimensional crimped fibers, ultra-fine fibers, and hot-melt fibers.

[0011] Further, the fineness of the far-infrared heating fibers in the dense fiber surface layer and the dense fiber inner layer is 1-3 D, the length is 30-60 mm, and the proportion of single-layer fibers is 0-40%; the fineness of the three-dimensional crimped hollow fibers is 2-4 dtex, the length is 40-80 mm, and the proportion of single-layer fibers is 0-30%; the fineness of the two-dimensional crimped fibers is 1-3 D, the length is 30-50 mm, and the proportion of single-layer fibers is 0-30%; the fineness of the ultra-fine fibers is 0.5-2 D, the length is 30-60 mm, and the proportion of single-layer fibers is 0-40%; the fineness of the hot-melt fibers is 1-3 D, the length is 30-70 mm, and the proportion of single-layer fibers is 10-50%.

[0012] Further, the fineness of the far-infrared heating fibers in the soft fiber upper layer and the soft fiber lower layer is 1-3 D, the length is 20-60 mm, and the proportion of single-layer fibers is 5-50%; the fineness of the three-dimensional crimped hollow fibers is 2-7 dtex, the length is 20-70 mm, and the proportion of single-layer fibers is 0-40%; the fineness of the two-dimensional crimped fibers is 1-4 D, the length is 30-60 mm, and the proportion of single-layer fibers is 0-40%; the fineness of the ultra-fine fibers is 0.5-1.5 D, the length is 30-70 mm, and the proportion of single-layer fibers is 0-50%; the fineness of the hot-melt fibers is 1-3 D, the length is 20-60 mm, and the proportion of single-layer fibers is 0-30%.

[0013] Further, the fineness of the far-infrared heating fibers in the fluffy fiber middle layer is 1-3 D, the length is 10-60 mm, and the proportion of single-layer fibers is 0-40%; the fineness of the three-dimensional crimped hollow fibers is 2-7 dtex, the length is 20-80 mm, and the proportion of single-layer fibers is 0-40%; the fineness of the two-dimensional crimped fibers is 1-3 D, the length is 20-60 mm, and the proportion of single-layer fibers is 0-50%; the fineness of the ultra-fine fibers is 0.5-1.5 D, the length is 30-80 mm, and the proportion of single-layer fibers is 0-80%; the fineness of the hot-melt fibers is 1-3 D, the length is 10-60 mm, and the proportion of single-layer fibers is 0-40%.

[0014] Further, the three-dimensional crimped hollow fibers, two-dimensional crimped fibers, ultra-fine fibers, far-infrared heating fibers, and hot-melt fibers in each layer are all chemical fibers, selected from one or more combinations of the following: polyethylene terephthalate, polylactic acid, polypropylene, polyimide, polyacrylic acid, polyvinylpyrrolidone, polyacrylamide, poly(p-phenyleneterephthalamide), polyacrylonitrile, polystyrene, polycaprolactone, polyamide.

[0015] Further, the far-infrared heating fibers in each layer contain one or more combinations of alumina powder, zirconia powder, magnesia powder, zirconium carbide powder, silicon carbide powder, antimony tin oxide powder, indium tin oxide powder, tungsten bronze powder, and carbon nanotubes.

[0016] The beneficial effects of the present invention due to the use of the above technical solutions are as follows: Combining the passive heat preservation effect of the hierarchical multi-level fluffy structure and the active heat preservation effect of the far-infrared heating fiber, it has better temperature control and heat preservation performance, and the thermal conductivity is 0.04 - 0.06 W / (m·k); By setting the volume density gradient distribution, while ensuring efficient air permeability and moisture permeability, it can effectively prevent the fluff in the fluffy layer from drilling out; Using all chemical fiber materials can effectively overcome the problem that traditional natural fiber filled flakes such as cotton and down cannot be machine-washed. Specific embodiments

[0017] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0018] The present invention discloses a temperature control four-season quilt filling flake with a hierarchical multi-level structure. The structure of the filling flake includes five fiber webs with a volume density gradient change, which are a dense fiber surface layer, a soft fiber upper layer, a fluffy fiber middle layer, a soft fiber lower layer, and a dense fiber inner layer. By regulating the volume density of the fiber layer to be gradient distributed from both sides to the middle and the fiber type ratio, heat transfer channels with a hierarchical multi-level structure are constructed, so as to effectively extend the diffusion path of heat in the temperature control four-season quilt flake. At the same time, from the dense fiber surface layer to the soft fiber upper layer to the fluffy fiber middle layer, the volume density decreases in turn and the thickness increases in turn, which can lock the temperature of the middle layer and prevent the fibers in the fluffy fiber middle layer from drilling out while ensuring the air permeability, moisture permeability and soft hand feeling of the flake. The dense fiber surface layer and the dense fiber inner layer are symmetrically arranged, the soft fiber upper layer and the soft fiber lower layer are symmetrically arranged, and the dense fiber surface layer, the soft fiber upper layer, the fluffy fiber middle layer, the soft fiber lower layer, and the dense fiber inner layer all contain far-infrared heating fibers; The gram weight range of the filling flake is 100 - 140 g / m 2 , the thickness is 3 - 6 cm, the thermal resistance value is 0.04 - 0.06 W / (m·k), the wind resistance is 0.03 - 0.08 KPa·s / m, and the moisture permeability is 600 - 1000 g / m 2 / d.

[0019] Specifically, the dense fiber surface layer and the dense fiber inner layer have the same components and functions, and their gram weight is 200 - 800 g / m 2(If the gram weight is too low, it cannot effectively prevent down from leaking; if the gram weight is too high, it will affect the air permeability and moisture permeability of the batting), with a thickness of 0.1 - 1 mm (if the thickness of the dense layer is too thick, the batting will feel bad), and the fiber components include far-infrared heating fibers, ultra-fine fibers, two-dimensional crimped fibers, three-dimensional crimped hollow fibers, and hot-melt fibers.

[0020] The upper soft fiber layer and the lower soft fiber layer have the same components and structure, with a density of 120 - 200 g / m 2 (If the gram weight is too low, the pores are large and cannot prevent the fibers in the fluffy layer from leaking down; if the gram weight is too high, the air permeability and moisture permeability of the batting are poor), with a thickness of 1 - 20 mm, and the fiber components include three-dimensional crimped hollow fibers, far-infrared heating fibers, two-dimensional crimped fibers, hot-melt fibers, and ultra-fine fibers.

[0021] The volume density of the middle fluffy fiber layer is 30 - 120 g / m 2 (If the bulk density is too high, it will lead to a low porosity and cannot store a large amount of static air), with a thickness of 20 - 50 mm, and the fiber components include far-infrared heating fibers, three-dimensional crimped hollow fibers (including fine-denier three-dimensional hollow fibers and coarse-denier three-dimensional hollow fibers), two-dimensional crimped fibers, ultra-fine fibers, and hot-melt fibers.

[0022] Furthermore, it should be noted that the fineness of the far-infrared heating fibers in the surface layer and the inner layer of the dense fibers is 1 - 3 D, and the length is 30 - 60 mm (if the length is too short, the fibers are likely to fall off during use; if the length is too long, they are prone to entanglement during carding), and the single-layer fiber proportion is 0 - 40%; the fineness of the three-dimensional crimped hollow fibers is 2 - 4 dtex, the length is 40 - 80 mm, and the single-layer fiber proportion is 0 - 30%; the fineness of the two-dimensional crimped fibers is 1 - 3 D, the length is 30 - 50 mm, and the single-layer fiber proportion is 0 - 30%; the fineness of the ultra-fine fibers is 0.5 - 2 D, the length is 30 - 60 mm, and the single-layer fiber proportion is 0 - 40%; the fineness of the hot-melt fibers is 1 - 3 D, the length is 30 - 70 mm, and the single-layer fiber proportion is 10 - 50% (if the content is too low, it cannot play a role in dense adhesion; if the content is too high, it will cause the batting to be hard).

[0023] The fineness of the far-infrared heating fibers in the upper soft fiber layer and the lower soft fiber layer is 1 - 3 D, the length is 20 - 60 mm, and the single-layer fiber proportion is 5 - 50%; the fineness of the three-dimensional crimped hollow fibers is 2 - 7 dtex, the length is 20 - 70 mm, and the single-layer fiber proportion is 0 - 40%; the fineness of the two-dimensional crimped fibers is 1 - 4 D, the length is 30 - 60 mm, and the single-layer fiber proportion is 0 - 40%; the fineness of the ultra-fine fibers is 0.5 - 1.5 D (if the fineness is too fine, it is difficult to effectively card; if the fineness is too high, it cannot improve the heat preservation effect of the batting), the length is 30 - 70 mm, and the single-layer fiber proportion is 0 - 50%; the fineness of the hot-melt fibers is 1 - 3 D, the length is 20 - 60 mm, and the single-layer fiber proportion is 0 - 30%.

[0024] The fineness of the far-infrared heating fibers in the fluffy fiber middle layer is 1 - 3 D, the length is 10 - 60 mm, and the proportion of single-layer fibers is 0 - 40% (if the content is too low, the temperature control effect is not good); the fineness of the three-dimensional crimped hollow fibers is 2 - 7 dtex, the length is 20 - 80 mm, and the proportion of single-layer fibers is 0 - 40%; the fineness of the two-dimensional crimped fibers is 1 - 3 D, the length is 20 - 60 mm, and the proportion of single-layer fibers is 0 - 50%; the fineness of the ultra-fine fibers is 0.5 - 1.5 D, the length is 30 - 80 mm, and the proportion of single-layer fibers is 0 - 80%; the fineness of the hot-melt fibers is 1 - 3 D, the length is 10 - 60 mm, and the proportion of single-layer fibers is 0 - 40%.

[0025] The three-dimensional crimped hollow fibers, two-dimensional crimped fibers, ultra-fine fibers, far-infrared heating fibers, and hot-melt fibers in each layer are all chemical fibers, selected from one or more combinations of the following: polyethylene terephthalate, polylactic acid, polypropylene, polyimide, polyacrylic acid, polyvinylpyrrolidone, polyacrylamide, poly(p-phenyleneterephthalamide), polyacrylonitrile, polystyrene, polycaprolactone, polyamide. In addition, the far-infrared heating fibers in each layer contain one or more combinations of alumina powder, zirconia powder, magnesia powder, zirconium carbide powder, silicon carbide powder, antimony tin oxide powder, indium tin oxide powder, tungsten bronze powder, and carbon nanotubes.

[0026] In addition, the thermal resistance value: measured using a KESF-TL-2C (THERMOLABOⅡ) instrument. The thermal resistance value refers to the inherent ability of a material to transfer or conduct heat, and is defined as the amount of heat transferred per unit time through a unit area (1 m²) of a material with a unit thickness (1 m). The test sample is cut into a 9×9 cm square and placed between two hot plates with a temperature difference of 10 °C. The heat consumption (W) is read from the instrument, and the thermal conductivity is calculated according to the following formula and converted to the International System of Units;

[0027] W: Heat consumption (W); D: Sample thickness (cm); A: Area of the heat dissipation plate (cm²); : Temperature difference between the two hot plates is 10 °C; Converted to the International System of Units K: (W / mk) = k×10² Moisture permeability: Reference standard: BS 7209:1990 Specification for Water vapor permeable apparel fabrics, Testing instrument: Moisture permeability tester RF4319; The sample is placed in a specified evaporating dish, 45 mL of distilled water is injected, and the fabric to be tested is fixed on the evaporating dish according to the standard, so that water vapor can only pass through the fabric surface. Calculate the moisture permeability WVP (g / m² / day) of the fabric according to the following formula:

[0028] M: Mass loss of distilled water (g) within time period t; t: Testing duration; A: Area of the sample exposed to air, which is 0.0054113 ㎡ in this test.

[0029] Air resistance: Use the KES F8 air resistance tester to test the resistance R (kPa•s / m) of air passing through the sample to compare air permeability. KES-F8 delivers air to the sample at a constant flow rate through the movement of the plunger and the cylinder piston. Air is delivered to the sample at a constant flow rate through the movement of the plunger and the cylinder piston. The air detects the pressure during exhaust or intake, and obtains the resistance R (kPa•s / m) of air passing through the sample. Cut the sample into a square with a size of 50 × 50 to 100 × 100 mm, release the instrument handle to fix the sample, cover the sample on the air permeable hole, then lower the handle, and tighten the sample fixing handle to fix the splint. Press the RESET SWITCH and START SWITCH continuously. The discharge process indicator light is on, and a cycle measurement is completed within 10 seconds. Read the instrument reading R. The larger R is, the poorer the air permeability.

[0030] Example 1:

[0031] The preparation method of the filling floc for the temperature-controlled four-season quilt with a hierarchical multi-stage structure of the present invention is specifically as follows:

[0032] (1) Opening and mixing: First, feed the rolled fiber into the opener for opening and straightening. The rotation speed range of the opening roller is 500 - 1200 r / min, and the feeding speed of the fiber roll is adjusted within the range of 5 - 15 m / min. The used straightening roller is adjusted by a hydraulic or pneumatic system, and the temperature range of the straightening roller is between 50 - 150 °C; Subsequently, fibers with different components, different finenesses, and different lengths are mixed according to a certain ratio (refer to the following step (2)) to obtain a fiber aggregate with different physical and chemical properties; (2) Carding and web laying: The various fiber aggregates obtained by the above-mentioned opening and mixing are carded by three carding machines with a draft ratio of 2.63, a belt scale speed of 5.42 m / s, and a feeding speed of 14.27 m / s to form a uniform, parallel, dense fiber surface layer, a soft fiber upper layer, a fluffy fiber middle layer, a soft fiber lower layer, and a dense fiber inner layer. Among them, the dense fiber surface layer and the dense fiber inner layer are composed of three-dimensional crimped hollow fibers with a diameter of 2.78 dtex and a length of 60 mm (single-layer proportion 30%), two-dimensional crimped fibers with a diameter of 1.2D and a length of 38 mm (single-layer proportion 30%), two-dimensional crimped fibers with a diameter of 1.5D and a length of 51 mm (single-layer proportion 30%), and hot-melt fibers with a diameter of 2D and a length of 51 mm (single-layer proportion 10%); the soft fiber upper layer and the soft fiber lower layer are composed of far-infrared heating fibers with a diameter of 1.2D and a length of 38 mm (single-layer proportion 30%), three-dimensional crimped hollow fibers with a diameter of 2.78 dtex and a length of 60 mm (single-layer proportion 20%), two-dimensional crimped fibers with a diameter of 1.2D and a length of 38 mm (single-layer proportion 20%), two-dimensional crimped fibers with a diameter of 1.5D and a length of 51 mm (single-layer proportion 20%), and hot-melt fibers with a diameter of 2D and a length of 51 mm (single-layer proportion 10%); the fluffy fiber middle layer is composed of far-infrared heating fibers with a diameter of 1.2D and a length of 38 mm (single-layer proportion 30%), three-dimensional crimped hollow fibers with a diameter of 6.67 dtex and a length of 60 mm (single-layer proportion 20%), two-dimensional crimped fibers with a diameter of 1.2D and a length of 38 mm (single-layer proportion 20%), two-dimensional crimped fibers with a diameter of 1.5D and a length of 51 mm (single-layer proportion 20%), and hot-melt fibers with a diameter of 2D and a length of 51 mm (single-layer proportion 10%). Subsequently, the above five fiber webs are laid (fiber web single layer 20 g / m²) to form the initial shape of the floc. (3) Thermal bonding and reinforcement: Use an oven with a length of 10 meters, a drying temperature of 180 °C, and a vehicle speed of 5 m / min to melt the hot-melt fibers in each functional layer of the filled floc, bond and fix the fibers, and improve the overall structural stability of the floc.

[0033] The filled floc obtained by the above method has a gram weight of 118 g / m 2 , a width of 230 cm, a thermal conductivity of 0.0452 W / (m·k), a moisture permeability of 643.10 g / m 2 / d, and an air resistance of 0.047 KPa·s / m.

[0034] Example 2:

[0035] A preparation method of a temperature-controlled four-season quilt filled floc with a hierarchical multi-level structure according to the present invention is specifically as follows: (1) Opening and blending: First, feed the fiber bales into an opener for opening and straightening. The rotational speed range of the opening rollers is 500 - 1200 r / min, and the feeding speed of the fiber bales is adjusted within the range of 5 - 15 m / min. The used straightening rollers are adjusted by a hydraulic or pneumatic system, and the temperature range of the straightening rollers is between 50 - 150 °C. Subsequently, fibers with different components, finenesses, and lengths are mixed in a certain proportion (refer to the following step (2)) to obtain a fiber aggregate with different physical and chemical properties. (2) Carding and web laying: Card the various fiber aggregates obtained from the above opening and blending through three carding machines. The draft ratio is 2.63, the belt scale speed is 5.42 m / s, and the feeding speed is 14.27 m / s to form a uniform, parallel, dense fiber surface layer, soft fiber upper layer, fluffy fiber middle layer, soft fiber lower layer, and dense fiber inner layer. Among them, the dense fiber surface layer and the dense fiber inner layer are composed of three-dimensional crimped hollow fibers with a diameter of 2.78 dtex and a length of 60 mm (single-layer proportion 30%), two-dimensional crimped fibers with a diameter of 1.2 D and a length of 38 mm (single-layer proportion 30%), two-dimensional crimped fibers with a diameter of 1.5 D and a length of 51 mm (single-layer proportion 30%), and hot-melt fibers with a diameter of 2 D and a length of 51 mm (single-layer proportion 10%); the soft fiber upper layer and the soft fiber lower layer are composed of far-infrared heating fibers with a diameter of 1.2 D and a length of 38 mm (single-layer proportion 35%), three-dimensional crimped hollow fibers with a diameter of 2.78 dtex and a length of 60 mm (single-layer proportion 10%), three-dimensional crimped hollow fibers with a diameter of 6.67 dtex and a length of 60 mm (single-layer proportion 10%), two-dimensional crimped fibers with a diameter of 1.2 D and a length of 38 mm (single-layer proportion 20%), and hot-melt fibers with a diameter of 2 D and a length of 51 mm (single-layer proportion 25%); the fluffy fiber middle layer is composed of far-infrared heating fibers with a diameter of 1.2 D and a length of 38 mm (single-layer proportion 20%), three-dimensional crimped hollow fibers with a diameter of 6.67 dtex and a length of 60 mm (single-layer proportion 20%), two-dimensional crimped fibers with a diameter of 1.2 D and a length of 38 mm (single-layer proportion 20%), two-dimensional crimped fibers with a diameter of 1.5 D and a length of 51 mm (single-layer proportion 30%), and hot-melt fibers with a diameter of 2 D and a length of 51 mm (single-layer proportion 10%). Subsequently, lay the above five fiber webs (fiber web single layer 20 g / m²) to form a preliminary shape of the floc. (3) Thermal bonding and reinforcement: Use an oven with a length of 10 meters, a drying temperature of 180 °C, and a vehicle speed of 5 m / min to melt the hot-melt fibers in each functional layer of the filled floc and bond and fix the fibers to improve the overall structural stability of the floc.

[0036] The filled floc of the temperature-controlled four-season quilt with a hierarchical multi-level structure obtained by the above method has a gram weight of 111 g / m2 , with a width of 230 cm, a thermal conductivity of 0.0476 W / (m·k), and a moisture permeability of 672.67 g / m 2 / d, and an air resistance of 0.047 KPa·s / m.

[0037] Example 3:

[0038] A method for preparing a temperature-controlled four-season quilt filling flake with a hierarchical multi-level structure according to the present invention comprises the following specific steps: (1) Opening and mixing: First, the wound fiber is fed into an opener for opening and straightening. The rotation speed range of the opening roller is 500 - 1200 r / min, and the feeding speed of the fiber roll is adjusted within the range of 5 - 15 m / min. The used straightening roller is adjusted by a hydraulic or pneumatic system, and the temperature range of the straightening roller is between 50 - 150 °C. Subsequently, fibers with different components, different finenesses, and different lengths are mixed in a certain proportion (refer to the following step (2)) to obtain a fiber aggregate with different physical and chemical properties; (2)Carding and web laying: The various fiber assemblies obtained from the above opening and mixing are carded by three carding machines with a draft ratio of 2.63, a belt scale speed of 5.42 m / s, and a feeding speed of 14.27 m / s to form a uniform, parallel, dense fiber surface layer, a soft fiber upper layer, a fluffy fiber middle layer, a soft fiber lower layer, and a dense fiber inner layer. Among them, the dense fiber surface layer and the dense fiber inner layer are composed of three-dimensional crimped hollow fibers with a diameter of 2.78 dtex and a length of 60 mm (single-layer proportion 30%), two-dimensional crimped fibers with a diameter of 1.2D and a length of 38 mm (single-layer proportion 30%), two-dimensional crimped fibers with a diameter of 1.5D and a length of 51 mm (single-layer proportion 30%), and hot-melt fibers with a diameter of 2D and a length of 51 mm (single-layer proportion 10%); the soft fiber upper layer and the soft fiber lower layer are composed of far-infrared heating fibers with a diameter of 1.2D and a length of 38 mm (single-layer proportion 30%), three-dimensional crimped hollow fibers with a diameter of 2.78 dtex and a length of 60 mm (single-layer proportion 25%), three-dimensional crimped hollow fibers with a diameter of 6.67 dtex and a length of 60 mm (single-layer proportion 10%), two-dimensional crimped fibers with a diameter of 1.2D and a length of 38 mm (single-layer proportion 10%), and hot-melt fibers with a diameter of 2D and a length of 51 mm (single-layer proportion 25%); the fluffy fiber middle layer is composed of three-dimensional crimped hollow fibers with a diameter of 6.67 dtex and a length of 60 mm (single-layer proportion 20%), two-dimensional crimped fibers with a diameter of 1.2D and a length of 38 mm (single-layer proportion 10%), two-dimensional crimped fibers with a diameter of 1.5D and a length of 51 mm (single-layer proportion 60%), and hot-melt fibers with a diameter of 2D and a length of 51 mm (single-layer proportion 10%). Subsequently, the above five fiber webs are laid (fiber web single layer 20 g / m²) to form a preliminary shape of the flake. (3)Thermal bonding and reinforcement: Use an oven with a length of 10 meters, a drying temperature of 180 °C, and a vehicle speed of 5 m / min to melt the hot-melt fibers in each functional layer of the filled flake and bond and fix the fibers to improve the overall structural stability of the flake.

[0039] The filled flake of the temperature-controlled four-season quilt with a hierarchical multi-level structure obtained by the method of Example 3 has a gram weight of 120 g / m 2 , a width of 230 cm, a thermal conductivity of 0.0511 W / (m·k), a moisture permeability of 657.88 g / m 2 / d, and an air resistance of 0.062 KPa·s / m.

[0040] In summary, the filling flake of the temperature-controlled four-season quilt with a hierarchical multi-level structure according to the present invention combines the passive heat preservation effect of the hierarchical multi-level fluffy structure and the active heat preservation effect of the far-infrared heating fiber, has better temperature control and heat preservation performance, can effectively prevent the floss of the fluffy layer from drilling out while ensuring high-efficiency air permeability and moisture permeability, and can also effectively overcome the problem that the filling flakes of traditional natural fibers such as cotton and down cannot be machine-washed.

[0041] The specific embodiments of the invention have been described above. It should be understood that the invention is not limited to the above specific embodiments, and the devices and structures not described in detail therein should be understood to be implemented in a common manner in the art; those skilled in the art can make various deformations or modifications within the scope of the claims and make several simple deductions, deformations or substitutions, which do not affect the essence of the invention.

Claims

1. A temperature-controlled four-season quilt filling sheet with a layered multi-level structure, characterized in that: The structure of the filling flakes comprises five layers of fiber nets with a gradient volume density, which are a dense fiber surface layer, a soft fiber upper layer, a fluffy fiber middle layer, a soft fiber lower layer and a dense fiber inner layer, the dense fiber surface layer and the dense fiber inner layer are symmetrically arranged, the soft fiber upper layer and the soft fiber lower layer are symmetrically arranged, and the dense fiber surface layer, the soft fiber upper layer, the fluffy fiber middle layer, the soft fiber lower layer and the dense fiber inner layer all contain far-infrared heating fibers; The filling flakes have a gram weight range of 100-140 g / m 2 , thickness is 3~6cm, thermal resistance is 0.04~0.06W / (m·k), wind resistance is 0.03~0.08KPa·s / m, and moisture permeability is 600~1000g / m 2 / d.

2. The temperature-controlling four-season quilt filling sheet with a layered multi-level structure according to claim 1, characterized in that: The dense fiber surface layer and the dense fiber inner layer have the same components and functions, and the gram weight is 200-800g / m 2 The thickness is 0.1~1mm, and the fiber components include far-infrared heating fiber, ultrafine fiber, two-dimensional curled fiber, three-dimensional curled hollow fiber, and hot-melt fiber.

3. The temperature-controlling four-season quilt filling sheet with a layered multi-level structure according to claim 1, characterized in that: The soft fiber upper layer and the soft fiber lower layer have the same composition and structure, and the density is 120-200g / m 2 , thickness is 1~20mm, and the fiber components include three-dimensional curled hollow fiber, far-infrared heating fiber, two-dimensional curled fiber, hot-melt fiber, and ultrafine fiber.

4. The temperature-controlling four-season quilt filling sheet with a layered multi-level structure according to claim 1, characterized in that: The bulk density of the fluffy fiber middle layer is 30-120 g / m 2 The thickness is 20~50mm, and the fiber components include far-infrared heating fiber, three-dimensional curled hollow fiber, two-dimensional curled fiber, ultrafine fiber, and hot-melt fiber.

5. The temperature-controlling four-season quilt filling sheet with a layered multi-level structure according to claim 2, characterized in that: The fineness of the far-infrared heating fibers in the dense fiber surface layer and the dense fiber inner layer is 1~3D, the length is 30~60mm, and the single-layer fiber accounts for 0~40%; the fineness of the three-dimensional curled hollow fiber is 2~4dtex, the length is 40~80mm, and the single-layer fiber accounts for 0~30%; the fineness of the two-dimensional curled fiber is 1~3D, the length is 30~50mm, and the single-layer fiber accounts for 0~30%; the fineness of the ultrafine fiber is 0.5~2D, the length is 30~60mm, and the single-layer fiber accounts for 0~40%; the fineness of the hot-melt fiber is 1~3D, the length is 30~70mm, and the single-layer fiber accounts for 10~50%.

6. The temperature-controlling four-season quilt filling sheet with a layered multi-level structure according to claim 3 is characterized in that: The fineness of the far-infrared heating fibers in the soft fiber upper layer and the soft fiber lower layer is 1~3D, the length is 20~60mm, and the single-layer fibers account for 5~50%; the fineness of the three-dimensional curled hollow fibers is 2~7dtex, the length is 20~70mm, and the single-layer fibers account for 0~40%; the fineness of the two-dimensional curled fibers is 1~4D, the length is 30~60mm, and the single-layer fibers account for 0~40%; the fineness of the ultrafine fibers is 0.5~1.5D, the length is 30~70mm, and the single-layer fibers account for 0~50%; the fineness of the hot-melt fibers is 1~3D, the length is 20~60mm, and the single-layer fibers account for 0~30%.

7. The temperature-controlling four-season quilt filling sheet with a layered multi-level structure according to claim 4, characterized in that: The far-infrared heating fiber in the middle layer of the fluffy fiber has a fineness of 1~3D, a length of 10~60mm, and a single-layer fiber accounts for 0~40%; the fineness of the three-dimensional curled hollow fiber is 2~7dtex, a length of 20~80mm, and a single-layer fiber accounts for 0~40%; the fineness of the two-dimensional curled fiber is 1~3D, a length of 20~60mm, and a single-layer fiber accounts for 0~50%; the fineness of the ultrafine fiber is 0.5~1.5D, a length of 30~80mm, and a single-layer fiber accounts for 0~80%; the fineness of the hot-melt fiber is 1~3D, a length of 10~60mm, and a single-layer fiber accounts for 0~40%.

8. The temperature-controlling four-season quilt with a layered multi-level structure according to any one of claims 2, 3 and 4, characterized in that: The three-dimensional curled hollow fibers, two-dimensional curled fibers, ultrafine fibers, far-infrared heating fibers, and hot-melt fibers described in each layer are all chemical fibers, selected from one or more combinations of the following: polyethylene terephthalate, polylactic acid, polypropylene, polyimide, polyacrylic acid, polypyrrolidone, polyacrylamide, poly(p-phenylene terephthalamide), polyacrylonitrile, polystyrene, polycaprolactone, and polyamide.

9. The temperature-controlling four-season quilt with a layered multi-level structure according to any one of claims 2, 3 and 4, characterized in that: The far-infrared heating fibers in each layer contain one or more combinations of aluminum oxide powder, zirconium oxide powder, magnesium oxide powder, zirconium carbide powder, silicon carbide powder, antimony tin oxide powder, indium tin oxide powder, tungsten bronze powder, and carbon nanotubes.

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