CN115679539A - Gradient wicking thermal insulating flocculus and preparation method thereof - Google Patents
Gradient wicking thermal insulating flocculus and preparation method thereof Download PDFInfo
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- CN115679539A CN115679539A CN202211410352.5A CN202211410352A CN115679539A CN 115679539 A CN115679539 A CN 115679539A CN 202211410352 A CN202211410352 A CN 202211410352A CN 115679539 A CN115679539 A CN 115679539A
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Abstract
The invention relates to a gradient wicking thermal insulating flocculus and a preparation method thereof, wherein the flocculus comprises three layers of fiber webs, wherein the bulk of the inner layer of fiber web is 20-70cm 3 The fiber raw materials are hydrophobic fiber A and low-melting-point fiber C, and the bulk of the middle layer fiber web is 50-100cm 3 The fiber raw materials are hydrophilic fiber B and low-melting-point fiber C, and the bulk of the outer layer fiber web is 90-130cm 3 The fiber raw materials are hydrophilic fiber B and low-melting-point fiber C; wherein the mass ratio of the hydrophobic fiber A or the hydrophilic fiber B is 85-100%, and the mass ratio of the low-melting-point fiber C is 0-15%; the preparation method comprises the steps of opening and mixing, carding, lapping, drying, cooling and shaping, ironing and finishing, rolling and trimming. Gradient of the inventionThe gram weight of the wicking thermal insulation flocculus is 40-400g/m 2 The compression elastic recovery rate is more than or equal to 92 percent, the heat conductivity coefficient is less than or equal to 0.05W/(m.K), the water absorption rate is more than or equal to 40 percent/s, the liquid water diffusion speed is more than or equal to 2mm/s, and the one-way transfer index is more than or equal to 100. Compared with the prior art, the material has a one-way moisture-conducting function, and improves the heat and moisture comfort of a human body when the human body is worn.
Description
Technical Field
The invention belongs to the technical field of textile processing, and relates to a gradient wicking thermal insulating flocculus and a preparation method thereof.
Background
The flocculus is a high-fluffy textile composed of fibers, has the advantages of lightness, thinness, softness, warmth retention and the like, but has large thickness and long water vapor transport channel, so that sweat of a human body is accumulated and condensed, and the comfortableness of clothes is reduced.
Chinese patents CN113524854A, CN113524737A and CN106926538A disclose a thermal insulating composite material with waterproof moisture-permeable film and a preparation method thereof, wherein the waterproof moisture-permeable film and the batting are combined to achieve the effect of one-way moisture permeability, but the waterproof moisture-permeable performance of the film is only concentrated on the surface layer of the batting, which is difficult to change the problem of moisture transport of the batting itself, so the overall moisture-permeable performance of the material is poor. Chinese patents CN108265395A and CN213501227U disclose batts excellent in moisture permeability and a method for preparing the same, which are more selective of hydrophilic fibers, which are not flame retardant.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the gradient wicking thermal insulating flocculus and the preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
one technical scheme of the invention is to provide a gradient wicking thermal insulation flocculus which comprises three layers of fiber webs, wherein the bulk of the inner layer of the fiber web is 20-70cm 3 The fiber raw materials are hydrophobic fiber A and low-melting-point fiber C, and the bulk of the middle layer fiber web is 50-100cm 3 The fiber raw materials are hydrophilic fiber B and low-melting-point fiber C, and the bulk of the outer layer fiber web is 90-130cm 3 The fiber raw materials are hydrophilic fiber B and low-melting-point fiber C; according to the mass percentage, the raw materials in each layer of fiber web are as follows: the proportion of the hydrophobic fiber A or the hydrophilic fiber B is 85-100%, the proportion of the low-melting-point fiber C is 0-15%, the proportion of the fibers of each layer of the fiber web is basically similar, the low-melting-point fiber C is used for realizing structural bonding, and the proportion of the fibers in the whole is determined by the bulkiness of each layer of the fiber web.
Further, the hydrophobic fiber A is one or more selected from polyester fiber, polypropylene fiber, polyethylene-polyester composite fiber and polyethylene-polypropylene composite fiber.
Furthermore, the fineness of the hydrophobic fiber A is 1-10D, and the length of the hydrophobic fiber A is 38-64mm.
Further, the hydrophilic fiber B is one or two of cotton fiber and viscose fiber.
Furthermore, the fineness of the hydrophilic fiber B is 1-10D, and the length of the hydrophilic fiber B is 38-64mm.
Further, the low-melting-point fiber C is one or two of low-melting-point polyester fiber and polypropylene-polyethylene composite fiber.
Furthermore, the melting point of the low-melting-point fiber C is 100-150 ℃, the fineness is 1-20D, and the length is 38-64mm.
One of the technical schemes of the invention is to provide a preparation method of gradient wicking thermal insulation flocculus, which comprises the following steps:
(1) Opening and mixing: mixing the hydrophobic fiber A, the hydrophilic fiber B and the low-melting-point fiber C according to a certain proportion, and then opening;
(2) Carding: respectively forming the opened and mixed fibers into uniform and compact sheet cotton, feeding the sheet cotton into a carding machine, carding the sheet cotton into a net, processing the net into a quantitative fiber web consisting of single fibers, and conveying the quantitative fiber web to a subsequent process;
(3) Lapping: uniformly folding the fiber web output by the carding machine, setting the fluffiness according to a three-layer structure, paving the fiber web to the required width and thickness, and conveying the fiber web to the next procedure;
(4) Drying: drying the fiber web by hot air through convection by using an oven;
(5) Cooling and shaping: carrying out forced air cooling on the fiber web discharged from the oven, and rapidly cooling and shaping to obtain flocculus;
(6) Ironing: a natural luster finishing machine is adopted to perform natural luster finishing on the surface of the flocculus so as to flatten the surface of the product;
(7) Rolling and trimming: the flocculus is trimmed, counted, cut, curled and packed into the wicking thermal flocculus.
Further, the width of the fiber web in the step (3) is 1000-5000mm, the thickness is 10-40mm, the lapping speed is 20-50m/min, and the output speed of the fiber web is 2-15m/min.
Further, the drying temperature in the step (4) is 80-170 ℃.
The thermal insulating flocculus is a fluffy fiber product with large thickness, so that a vapor transport channel is long, sweat of a human body is accumulated and condensed, and the comfort of clothes is reduced. The invention relates to a three-layer fiber web structure, wherein an inner layer fiber web is a hydrophobic layer with low fluffiness, a middle layer fiber web is a hydrophilic layer with low fluffiness, and an outer layer fiber web is a hydrophilic layer with high fluffiness.
Gradient wicking thermal insulating flocculusThe gram weight is 40-400g/m 2 The compression elastic recovery rate is more than or equal to 92 percent, the heat conductivity coefficient is less than or equal to 0.05W/(m.K), the water absorption rate is more than or equal to 40 percent/s, the liquid water diffusion speed is more than or equal to 2mm/s, and the one-way transfer index is more than or equal to 100.
Compared with the prior art, the invention has the following advantages:
(1) The gradient wicking thermal insulating flocculus has an excellent one-way moisture-conducting function, can realize one-way conduction of human sweat, and improves the heat and moisture comfort in the wearing process;
(2) The inner layer of the gradient wicking thermal flocculus is made of hydrophobic fibers, so that discomfort caused by sweat condensation can be effectively avoided.
Detailed Description
The present invention will be described in detail with reference to specific examples. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
The equipment used in the following examples is conventional in the art unless otherwise specified; unless otherwise specified, all reagents used are commercially available products or prepared by methods conventional in the art, and those not described in detail in the following examples can be achieved by means of experimental methods conventional in the art.
Example 1:
a gradient wicking thermal insulating flocculus and a preparation method thereof are disclosed, the preparation method comprises the following steps:
weighing and unpacking 92wt% of polyester fiber (with fineness of 1.5D and length of 51 mm) and 8wt% of polypropylene-polyethylene composite fiber (with melting point of 110 ℃, fineness of 3D and length of 51 mm) as raw materials of the inner-layer fiber web; weighing and unpacking 95wt% of cotton fiber (with fineness of 2D and length of 51 mm) and 5wt% of polypropylene-polyethylene composite fiber (with melting point of 110 ℃, fineness of 3D and length of 51 mm) as raw materials of the middle layer fiber web; weighing and unpacking 92wt% of cotton fiber (with fineness of 2D and length of 51 mm) and 8wt% of polypropylene-polyethylene composite fiber (with melting point of 110 ℃, fineness of 3D and length of 51 mm) as raw materials of the outer-layer fiber web. By opening mixing and double tinThe forest double-doffer double-random carding machine forms a uniform quantitative fiber web after being carded, and the uniform quantitative fiber web is formed by lapping, wherein the thickness of the fiber web is 20mm, the width of the fiber web is 3000mm (the lapping speed is 30m/min, the output speed of the fiber web is 5 m/min), the bulk is 55cm 3 Per g (inner layer) 100cm 3 G (middle layer) and 120cm 3 The fiber web is dried at 140 ℃, is forced air-cooled, blown upwards and sucked downwards, is quickly cooled and shaped, and is scalded, rolled and trimmed.
The weight of the finally obtained gradient wicking thermal-insulation wadding sheet is 150g/m 2 The compression elastic recovery rate is 97.2%, the heat conductivity coefficient is 0.031W/(m.K), the afterflame time is 0s, the damage length is 1.9mm, the thermal shrinkage rate (260 ℃,5 min) is 6.1% in the transverse direction and 5.5% in the longitudinal direction, no melting exists, the water absorption rate is 45%/s, the liquid water diffusion rate is 3mm/s, and the unidirectional transfer index is 120.
Example 2:
a gradient wicking thermal insulating flocculus and a preparation method thereof are disclosed, the preparation method comprises the following steps:
weighing and unpacking 95wt% of polypropylene fiber (with fineness of 1.5D and length of 51 mm) and 5wt% of polypropylene-polyethylene composite fiber (with melting point of 110 ℃, fineness of 3D and length of 51 mm) as raw materials of the inner-layer fiber web; weighing and unpacking 95wt% of cotton fiber (with fineness of 2D and length of 51 mm) and 5wt% of polypropylene-polyethylene composite fiber (with melting point of 110 ℃, fineness of 3D and length of 51 mm) as raw materials of the middle layer fiber web; weighing and unpacking 92wt% of cotton fiber (with fineness of 2D and length of 51 mm) and 8wt% of polypropylene-polyethylene composite fiber (with melting point of 110 ℃, fineness of 3D and length of 51 mm) as raw materials of the outer-layer fiber web. Forming uniform quantitative fiber web after opening and mixing and carding by a double-cylinder double-doffer double-random carding machine, and forming the uniform quantitative fiber web with the thickness of 20mm, the width of 3000mm (the lapping speed is 30m/min, the output speed of the fiber web is 5 m/min) and the filling power of 50cm through lapping 3 (inner layer) 80cm 3 G (middle layer) and 130cm 3 The fiber web is dried at 140 ℃, is forced air-cooled, blown upwards and sucked downwards, is quickly cooled and shaped, and is scalded, rolled and trimmed.
The final weight of the gradient wicking thermal batt was 155g/m 2 Elasticity under compressionThe recovery rate is 96.5%, the heat conductivity coefficient is 0.035W/(m.K), the afterflame time is 0s, the damage length is 2.2mm, the heat shrinkage rate (260 ℃,5 min) is 7.8% in the transverse direction and 5.1% in the longitudinal direction, no melting exists, the water absorption rate is 55%/s, the liquid water diffusion rate is 8mm/s, and the one-way transfer index is 140.
Example 3:
a gradient wicking thermal insulating flocculus and a preparation method thereof are disclosed, the preparation method comprises the following steps:
weighing and unpacking 95wt% of polyester fiber (with fineness of 1.5D and length of 51 mm) and 5wt% of polypropylene-polyethylene composite fiber (with melting point of 110 ℃, fineness of 3D and length of 51 mm) as raw materials of the inner-layer fiber web; weighing and unpacking 95wt% of viscose fibers (with the fineness of 2D and the length of 51 mm) and 5wt% of polypropylene-polyethylene composite fibers (with the melting point of 110 ℃, the fineness of 3D and the length of 51 mm) as raw materials of the fiber web of the middle layer; weighing and unpacking 92wt% of viscose fibers (with fineness of 2D and length of 51 mm) and 8wt% of polypropylene-polyethylene composite fibers (with melting point of 110 ℃, fineness of 3D and length of 51 mm) as raw materials of the outer-layer fiber web. Forming uniform quantitative fiber web after opening and mixing and carding by a double-cylinder double-doffer double-random carding machine, and forming the uniform quantitative fiber web with the thickness of 20mm, the width of 3000mm (the lapping speed is 30m/min, the output speed of the fiber web is 5 m/min) and the filling power of 50cm through lapping 3 (inner layer) 80cm 3 G (middle layer) and 130cm 3 Drying the fiber web at 140 ℃, performing forced air cooling, upward blowing and downward sucking, quickly cooling and shaping, then performing ironing and polishing, and rolling and trimming.
The final weight of the gradient wicking thermal batt was 175g/m 2 The compression elastic recovery rate is 97.5%, the thermal conductivity coefficient is 0.032W/(m.K), the afterflame time is 0s, the damage length is 4.1mm, the thermal shrinkage rate (260 ℃,5 min) is 6.6% in the transverse direction and 6.2% in the longitudinal direction, no melting occurs, the water absorption rate is 42%/s, the liquid water diffusion rate is 6mm/s, and the one-way transfer index is 115.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make modifications and alterations without departing from the scope of the present invention.
Claims (10)
1. The gradient wicking thermal insulation flocculus is characterized by comprising three layers of fiber webs, wherein the bulk of the inner layer of the fiber web is 20-70cm 3 The fiber raw materials are hydrophobic fiber A and low-melting-point fiber C, and the bulk of the middle layer fiber web is 50-100cm 3 The fiber raw materials are hydrophilic fiber B and low-melting-point fiber C, and the bulk of the outer layer fiber web is 90-130cm 3 The fiber raw materials are hydrophilic fiber B and low-melting-point fiber C; according to the mass percentage, the raw materials in each layer of fiber web are as follows: the proportion of the hydrophobic fiber A or the hydrophilic fiber B is 85-100%, and the proportion of the low-melting-point fiber C is 0-15%.
2. The gradient wicking thermal batt of claim 1 wherein the hydrophobic fibers A are selected from one or more of polyester fibers, polypropylene fibers, polyethylene-polyester composite fibers and polyethylene-polypropylene composite fibers.
3. The gradient wicking thermal batt of claim 2 wherein the hydrophobic fibers a have a fineness of 1 to 10D and a length of 38 to 64mm.
4. The gradient wicking thermal batt of claim 1 wherein said hydrophilic fibers B are selected from one or both of cotton and viscose.
5. The gradient wicking thermal batt of claim 4 wherein the hydrophilic fibers B have a fineness of 1-10D and a length of 38-64mm.
6. The gradient wicking thermal batt of claim 1 wherein the low melt fiber C is selected from one or both of low melt polyester fiber and polypropylene-polyethylene conjugate fiber.
7. The gradient wicking thermal batt of claim 6 wherein the low melting fiber C has a melting point of 100-150 ℃, a fineness of 1-20D, and a length of 38-64mm.
8. A method of making gradient wicking thermal batts according to any one of claims 1 to 7, comprising the steps of:
(1) Opening and mixing: mixing the hydrophobic fiber A, the hydrophilic fiber B and the low-melting-point fiber C according to a certain proportion, and then opening;
(2) Carding: the fibers after opening and mixing are respectively formed into a uniform and compact sheet cotton carded web, processed into a quantitative fiber web consisting of single fibers and conveyed to the next working procedure;
(3) Lapping: uniformly folding the fiber web, setting the bulkiness according to a three-layer structure, laying the fiber web to the required width and thickness, and conveying the fiber web to the next procedure;
(4) Drying: drying the fiber web;
(5) Cooling and shaping: cooling and shaping the fiber web to obtain flocculus;
(6) Ironing: the surface of the flocculus is polished to be smooth;
(7) Rolling and trimming: the flocculus is trimmed, counted, cut, curled and packed into the wicking thermal flocculus.
9. The method of claim 8, wherein in step (3), the width of the web is 1000-5000mm, the thickness is 10-40mm, the lapping speed is 20-50m/min, and the output speed of the web is 2-15m/min.
10. The method of claim 8, wherein the drying temperature in step (4) is 80-170 ℃.
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| CN202211410352.5A CN115679539A (en) | 2022-11-11 | 2022-11-11 | Gradient wicking thermal insulating flocculus and preparation method thereof |
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