WO2023280087A1

WO2023280087A1 - Thermal management fabric, preparation method therefor, and application thereof

Info

Publication number: WO2023280087A1
Application number: PCT/CN2022/103568
Authority: WO
Inventors: 陶光明; 吴嘉威
Original assignee: 武汉格物感知信息科技有限公司
Priority date: 2021-07-09
Filing date: 2022-07-04
Publication date: 2023-01-12
Also published as: CN115595707A

Abstract

The present application discloses a preparation method for a thermal management fabric, comprising the following steps: preparing thermal management fiber filaments; cutting off the thermal management fiber filaments to obtain thermal management short fibers; spinning the thermal management short fibers to obtain thermal management yarns, the thermal management yarn spinning process being pure spinning of the thermal management short fibers or blending of the thermal management short fibers and other short fibers or filaments; and weaving the thermal management yarns to obtain a thermal management fabric, the thermal management fiber filaments being selected from one of cooling fibers, warm fibers, and temperature regulation fibers. The present application provides a thermal management fabric and a preparation method therefor. The thermal management fabric has a good thermal management function on the basis of achieving cotton softness and good air permeability, and is suitable for high comfort of human skin.

Description

A kind of thermal management fabric, preparation method and application thereof

technical field

The present application relates to the technical field of thermal management fibers, in particular to a thermal management fabric, a preparation method and its application.

Background technique

The increasingly serious energy problem has resulted in huge economic losses and severe climate problems, further making extreme weather such as high temperature and severe cold more severe and frequent. The stimulation of overcooling and overheating often endangers human health, causing discomfort and disease. Traditional thermal management systems have good heating and cooling effects, but not only consume a lot of energy, but also cannot provide timely and effective temperature control, especially in outdoor activities. As a technology that only provides heating or cooling to the individual and its local environment, personal thermal management will not waste heat and cold in heating or cooling the entire building. It is a personalized and efficient solution. While achieving passive thermal regulation performance, it can reduce human's dependence on low-energy-efficiency temperature control methods such as air conditioners, and meet personalized thermal comfort needs more energy-saving and economical.

Although the innovative development of thermal management and nanotechnology has turned smart clothing from an idea into reality, and the field of smart fabrics has made great progress in recent years, most of the existing technologies still have poor temperature control effects, bulky and not portable, active energy consumption, and complex processes. , high production cost, poor durability and washing resistance, etc., and the breakthrough of its key technology lies in the development of intelligent fibers and fabrics with their own temperature management capabilities.

At present, some progress has been made in thermal fiber. In the patent CN110387592A, a preparation method, product and application of a porous resin fiber with an oriented pore structure are proposed. By adjusting the temperature of directional freezing, porous resin fibers with different pore sizes can be prepared. The fiber obtained by the above invention has the effect of heat insulation and heat preservation, but due to the influence of the porosity inside the fiber, the fiber strength is low and lacks weavability, which greatly limits its textile technology, and cannot be further made into commercial fabrics and clothing products, and lacks practicability.

In terms of refrigeration fibers, a radiation refrigeration fiber and its preparation method and application are proposed in the patent CN110685031A. The radiation refrigeration fiber that can reflect visible light and near-infrared light is prepared by melt spinning, and can pass through the atmosphere in the form of infrared radiation. The window emits heat, has a visible near-infrared reflectivity of ≥ 60% and an infrared emissivity of ≥ 80%, and the fiber can be further prepared to obtain a cooling textile. However, due to the doping of internal particles, the fiber strength is too low, which will affect the subsequent spinning and weaving process, and the fabric is not soft and comfortable enough, and the resulting fabric also has a large amount of light transmission due to the pores in the warp and weft structure, resulting in a decrease in reflectivity Thus greatly affecting the cooling performance.

In terms of temperature-controlling fibers, a phase-change microsphere, intelligent temperature-regulating fiber and its preparation method are proposed in the patent CN109234825A. First, phase-change microspheres with a core-shell structure are prepared, and then the intelligent Composite fiber with thermoregulation function wraps the phase change material through graphene hollow spheres to reduce the leakage of phase change material during use. Due to the high thermal conductivity of graphene, it can effectively promote the heat exchange between the environment and the fabric and the fabric and the surface of the human body. And it has the effects of low leakage, antibacterial, anti-static, anti-ultraviolet, etc., but the temperature control performance will decrease if the load of the phase change material is too low, and the fiber strength will be greatly reduced if the load is too high, which will affect spinning and weaving, and the prepared fabric Not soft and comfortable enough to be suitable for apparel products.

Contents of the invention

In view of the above problems, this application proposes a thermal management fabric and its preparation method. The thermal management fabric has a good thermal management function on the basis of realizing cotton softness and good mechanical properties, and is suitable for high comfort of human skin. sex.

The application provides the following technical solutions.

1. A method for preparing a thermal management fabric, comprising the steps of:

preparing thermal management fiber filaments;

Cutting the thermal management fiber filaments to obtain thermal management short fibers;

Spinning thermal management staple fibers to obtain thermal management yarns; the step of spinning thermal management yarns to obtain thermal management yarns is to purely spin thermal management staple fibers or blend them with other staple fibers or filaments to obtain thermal management yarns;

Weaving thermal management yarns to obtain thermal management fabrics;

The thermal management fiber filaments are selected from one of cooling fibers, warming fibers or temperature regulating fibers.

2. The method for preparing a thermal management fabric according to item 1, wherein the cooling fiber is based on a polymer material and doped with inorganic micro-nano particles, and the inorganic micro-nano particles in the cooling fiber The mass fraction is 40-90%, preferably 70-90%, and the mass fraction of the polymer material in the cooling fiber is 10-60%, preferably 10-30%.

3. The method for preparing a thermal management fabric according to item 1, wherein the thermal-retaining fiber is made of a polymer material, the thermal-retaining fiber has a porous structure, and the cross-section of the pore structure is circular or elliptical shape.

4. The method for preparing a thermal management fabric according to item 1, wherein the temperature-regulating fiber is based on a polymer material and is doped with a phase-change material, and the phase-change material in the temperature-regulating fiber The mass fraction is 40-90%, preferably 70-90%, and the mass fraction of the polymer material in the temperature regulating fiber is 10-60%, preferably 10-30%.

5. The method for preparing a heat management fabric according to item 1, wherein the length of the short heat management fibers is 10mm-100mm, preferably 30-50mm.

6. The method for preparing a thermal management fabric according to item 1 or 3, characterized in that the porous structure of the heat-retaining fiber has a porosity in the range of 50-90%, preferably 75-90%, and a specific surface area in the range of 20 -100m ² /g, preferably 30-50m ² /g.

7. The method for preparing a thermal management fabric according to any one of items 3-5, wherein the polymer material is selected from polylactic acid (PLA), polymethyl methacrylate (PMMA), polyethylene ( PE), polypropylene (PP), polyamide (PA), polyethylene terephthalate (PET), polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), polystyrene (PS), poly Vinyl alcohol (PVA), polyurethane (PU), polyacrylonitrile (PAN), cellulose, chitosan, polyparaphenylene terephthalamide (PPTA), polym-phenylene isophthalamide ( PMIA), cycloolefin copolymer (COC), polycarbonate (PC), acrylonitrile-butadiene-styrene (ABS), styrene dimethyl methacrylate copolymer (SMMA), polyoxymethylene (POM ), polyphenylene oxide (PPO), polytrimethylene terephthalate (PTT), polyvinylidene chloride resin (PVDC), polyimide (PI), vinyl acetate resin, polyvinyl acetal, Polyester and Sodium Isophthalate Sulfonate Copolymer, Acrylate Copolymer, Polyvinyl Formal, Polyvinyl Acetate (PVAC), Polyethylene Terephthalate, Meta-Aramid , dibutyryl chitin (DBCH), polybenzimidazole, polybenzobisoxazole (PBO) and polyparabenamide (PBA), preferably polyimide ( PI), polylactic acid (PLA) or polyvinyl alcohol (PVA).

8. The method for preparing a heat management fabric according to item 2, wherein the inorganic micro-nano particle material is selected from titanium dioxide (TiO2), silicon dioxide (SiO2), zinc oxide (ZnO), silicon carbide (SiC ), silicon nitride (Si3N4), zinc sulfide (ZnS), aluminum oxide (Al2O3), magnesium oxide (MgO), iron oxide (Fe2O3), boron nitride (BN), barium sulfate (BaSO4), barium carbonate (BaCO3 ) and aluminum silicate (Al2SiO5), preferably titanium dioxide (TiO2).

9. The method for preparing a thermal management fabric according to item 4, wherein the phase change material is selected from the group consisting of acetic acid, capric acid, myristic acid, pentadecanoic acid, palmitic acid, eicosanic acid, dodecane, Tetradecane, pentadecane, hexadecane, heptadecane, octadecane, nonadecane, eicosane, docosane, octacosane, stearic acid, palmitic acid, myristic acid, One or more of lauric acid, solid paraffin, sectioned paraffin, polyhydric alcohol, polyethylene glycol, erythritol and polyolefin, preferably polyethylene glycol.

10. The method for preparing a thermal management fabric according to Item 1, wherein the other short fibers are selected from nylon staple fibers, aramid staple fibers, acrylic staple fibers, polyester staple fibers, cotton staple fibers, and viscose staple fibers. One or more of the fibers are preferably cotton staple fibers or viscose staple fibers.

11. The method for preparing a heat management fabric according to item 1, wherein when the heat management short fibers are blended with the other short fibers, the content of the heat management short fibers in the heat management yarn 30-100%, preferably 80%-100%;

The content ratio of the thermal management short fibers blended with the other short fibers is 3:7-10:0, preferably 8:2-10:0.

12. The method for preparing a thermal management fabric according to item 1, wherein the other filaments are selected from polyester filaments, nylon filaments, acrylic filaments, polypropylene filaments, polyvinyl chloride filaments, and spandex filaments , vinylon filament and viscose fiber in one or more, preferably polyester filament.

13. The method for preparing a thermal management fabric according to item 12, wherein when the thermal management staple fiber is blended with the other filaments, the content of the thermal management staple fiber in the thermal management yarn 30-100%, preferably 80%-100%;

The blended content ratio of the thermal management short fibers and the other filaments is 3:7-10:0, preferably 8:2-10:0.

14. A thermal management fabric, characterized in that it is prepared by the method described in any one of items 1-14.

15. The heat management fabric according to item 14, characterized in that the heat management fabric prepared by the cooling fiber has a hairiness structure on the heat management fabric, so that the heat management fabric has low light transmittance , greatly improve the reflectivity, and then have a cooling effect;

The heat management fabric prepared by the heat preservation fiber, the hairiness structure of the transverse heat preservation fiber and the longitudinal heat preservation fiber on the heat management fabric are interwoven and superimposed to form pores, and the pores fix the micro-environmental air, so that the heat management fabric The thermal conductivity is reduced, which in turn has the effect of keeping warm;

The heat management fabric prepared by the temperature control fiber has a hairiness structure on the heat management fabric, thereby improving the mechanical properties and softness and comfort of the heat management fabric.

16. A thermal management mask, characterized in that it is prepared from the thermal management fabric described in item 14; the thermal management fabric is prepared from cooling fibers.

17. The thermal management mask according to item 16, characterized in that the mask includes a mask body and a tie, and a thermal management functional layer is provided on the mask body, and the thermal management functional layer is prepared from the fabric.

The preparation method of the thermal management fabric provided by this application is to cut the thermal management fiber filaments into short fibers and then spin and weave. The yarn structure can be designed according to the functional requirements, and the thermal management function with high mechanical strength and weavable performance can be prepared. Yarn, the prepared fabric has a high comfort like cotton, so it can be applied to clothing products.

The preparation method of the present application can solve the problem that the functional filament cannot be woven directly or is difficult to weave, and can solve the problem that the existing functional filament is only mixed as warp or weft in weaving due to its low mechanical properties, resulting in greatly weakened performance question.

In the thermal management fabric prepared by the preparation method of the present application, after the thermal management fiber filaments are cut into thermal management short fibers, the thermal management short fibers have a certain hairiness structure. The light leakage caused by the outdoor direct sunlight environment greatly reduces the transmittance, improves the reflectivity, blocks the entry of solar radiation energy, thereby enhancing the cooling effect; in terms of warmth retention, the hairiness structure makes the contact area between the fabric and the skin smaller, It is equivalent to increasing the still air layer and reducing the thermal conductivity, thereby enhancing the warmth retention effect.

detailed description

The following describes the exemplary embodiments of the present application, including various details of the embodiments of the present application to facilitate understanding, and they should be considered as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

The application provides a method for preparing a thermal management fabric, comprising the following steps:

Step 1: preparing thermal management fiber filaments;

Step 2: cutting the thermal management fiber filaments to obtain thermal management short fibers;

Step 3: Spinning thermal management staple fibers to obtain thermal management yarns; the step of spinning thermal management yarns to obtain thermal management yarns is to purely spin thermal management staple fibers or blend them with other staple fibers or filaments to obtain thermal management yarns Yarn; (the performance of the thermal management fabric obtained by pure spinning of thermal management staple fiber is better than that of the thermal management fabric obtained by blending thermal management staple fiber with other short fibers, and the thermal management fabric obtained by blending the thermal management staple fiber with other short fibers The performance of the fabric is better than that of the thermal management fabric obtained by blending the thermal management short fiber with other filaments).

Step 4: Weaving thermal management yarns to obtain thermal management fabrics;

When the thermal management fiber filament is a cooling fiber, the thermal management fabric not only has the performance of cooling, but also has functions such as softness and high mechanical strength; when the thermal management fiber filament is a thermal fiber, the The thermal management fabric not only has the function of keeping warm, but also has functions such as softness and high mechanical strength; when the thermal management fiber filament is a temperature-regulating fiber, the thermal management fabric not only has the function of keeping warm in a cold environment, but also has the function of keeping warm in a hot environment. It has the function of cooling in the environment, but also has the functions of softness and high mechanical strength, which is suitable for wearing and has high comfort.

In the present application, the cooling fiber is based on a polymer material, doped with inorganic micro-nano particles, and the mass fraction of the inorganic micro-nano particles in the cooling fiber is 40-90%, preferably 70-90% , the mass fraction of the polymer material in the cooling fiber is 10-60%, preferably 10-30%.

In the cooling fiber, the content of the inorganic Wiener particles can be 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67% , 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84 %, 85%, 86%, 87%, 88%, 89%, 90%.

In the cooling fiber, the content of the polymer material can be 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21% %, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54% , 55%, 56%, 57%, 58%, 59%, 60%.

The cooling fiber can be prepared by one of melt spinning method, wet spinning method, hot drawing method, freeze spinning method and the like.

For example: the cooling fiber is prepared by melt spinning: the polymer base material and inorganic micro-nano particles are melt-extruded, cooled, and pelletized to prepare a composite material slice, and after drying, the composite material slice is put into a spinning machine, and each The temperature in the temperature zone makes the material melt and extrude at the spinneret, and the cooling fiber is obtained after drawing and winding.

For example: the cooling fiber is prepared by wet spinning: cellulose pulp is used as raw material, and cellulose slurry is obtained through alkalization, aging, sulfonation and other steps, and a certain amount of inorganic micro-nano particles are added to the slurry to obtain a mixed The slurry is spun and stretched in a coagulation bath to obtain cooling short fibers or cooling fiber filaments.

In the present application, the heat-retaining fiber is made of polymer material, the heat-retaining fiber has a porous structure, and the porous structure is closed pores (that is, adjacent pores do not communicate with each other), and the cross-section of the porous structure is round or oval.

The heat-retaining fiber can be prepared by one of melt spinning, wet spinning, hot drawing, and freeze spinning.

For example: prepare thermal fiber by wet spinning method: dissolve the polymer base material in a solvent and blend it with thermally decomposable particles, then extrude in a coagulation bath to prepare composite fiber Heat treatment in the environment forms a pore structure, and obtains thermal fiber filaments with pores.

In the present application, the temperature-regulating fiber is based on a polymer material, doped with a phase-change material, and the mass fraction of the phase-change material in the temperature-regulating fiber is 40-90%, preferably 70-90% , the mass fraction of the polymer material in the temperature regulating fiber is 10-60%, preferably 10-30%.

In the temperature regulating fiber, the content of the phase change material is 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51% %, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84% , 85%, 86%, 87%, 88%, 89%, 90%.

In the temperature regulating fiber, the content of the polymer material is 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21% %, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54% , 55%, 56%, 57%, 58%, 59%, 60%.

The temperature-regulating fiber can be prepared by one of the methods of melt spinning, wet spinning, hot drawing, and freeze spinning.

For example: prepare temperature-controlled fibers by wet spinning: take the polymer base material and phase change material and mix them evenly in a solvent to make a spinning stock solution. Then stretching, drying, and heat setting are carried out to obtain temperature-controlled fiber filaments loaded with phase change materials.

In the present application, the length of the short thermal management fibers is 10mm-100mm, preferably 30-50mm.

The length of the thermal management short fibers may be one of 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm.

In the present application, the porosity of the porous structure of the heat-retaining fiber ranges from 50-90%, preferably 75-90%, and the specific surface area ranges from 20-100m ² /g, preferably 30-50m ² /g.

The porosity of the porous structure of the heat-retaining fiber may be one of 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, and 90%.

The specific surface area of the porous structure of the thermal fiber may be 20m ² /g, 25m ² /g, 30m ² /g, 35m ² /g, 40m ² /g, 45m ² /g, 50m ² /g, 55m ² /g One of g, 60m ² /g, 65m ² /g, 70m ² /g, 75m ² /g, 80m ² /g, 85m ² /g, 90m ² /g.

In the present application, the polymer material is selected from polylactic acid (PLA), polymethyl methacrylate (PMMA), polyethylene (PE), polypropylene (PP), polyamide (PA), polyterephthalate Polyethylene formate (PET), polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), polystyrene (PS), polyvinyl alcohol (PVA), polyurethane (PU), polyacrylonitrile (PAN), fiber Chin, chitosan, poly-p-phenylene terephthalamide (PPTA), poly-m-phenylene isophthalamide (PMIA), cycloolefin copolymer (COC), polycarbonate (PC), Acrylonitrile-butadiene-styrene (ABS), styrene dimethacrylate copolymer (SMMA), polyoxymethylene (POM), polyphenylene oxide (PPO), polytrimethylene terephthalate (PTT) , polyvinylidene chloride resin (PVDC), polyimide (PI), vinyl acetate resin, polyvinyl acetal, polyester and sodium isophthalate sulfonate copolymer, acrylate copolymer , polyvinyl formal, polyvinyl acetate (PVAC), polyethylene terephthalate, meta-aromatic polyamide, dibutyryl chitin (DBCH), polybenzimidazole, polybenzobis One or more of bisoxazole (PBO) and polyparabenamide (PBA).

When the thermal management fiber is a thermal fiber, the polymer material is preferably polyimide (PI).

When the thermal management fiber is a cooling fiber, the polymer material is preferably polylactic acid (PLA).

When the thermal management fibers are temperature regulating fibers, the polymer material is preferably polyvinyl alcohol (PVA).

In this application, the inorganic micro-nano particle material is selected from titanium dioxide (TiO ₂ ), silicon dioxide (SiO ₂ ), zinc oxide (ZnO), silicon carbide (SiC), silicon nitride (Si ₃ N ₄ ), Zinc sulfide (ZnS), aluminum oxide (Al ₂ O ₃ ), magnesium oxide (MgO), iron oxide (Fe ₂ O ₃ ), boron nitride (BN), barium sulfate (BaSO ₄ ), barium carbonate (BaCO ₃ ) and one or more of aluminum silicate (Al ₂ SiO ₅ ), preferably titanium dioxide (TiO ₂ ).

In the present application, the phase change material is selected from the group consisting of acetic acid, capric acid, myristic acid, pentadecanoic acid, palmitic acid, eicosic acid, dodecane, tetradecane, pentadecane, hexadecane, heptadecane Alkane, octadecane, nonadecane, eicosane, docosane, octacosane, stearic acid, palmitic acid, myristic acid, lauric acid, solid paraffin, sliced paraffin, polyol, polyethylene One or more of glycol, erythritol and polyolefin, preferably polyethylene glycol.

In the present application, the other short fibers are selected from one or more of nylon staple fibers, aramid staple fibers, acrylic staple fibers, polyester staple fibers, cotton staple fibers, and viscose staple fibers, preferably cotton staple fibers fiber or viscose staple fiber.

In the present application, when the thermal management short fibers are blended with the other short fibers to form a thermal management yarn, in the thermal management yarn, the content of the thermal management short fibers is 30-100%, preferably 80-100%. In the thermal management yarn, the content of the other short fibers is 0-70%. The content ratio of the thermal management short fibers to the other short fibers is 3:7-10:0, preferably 8:2-10:0.

In a specific embodiment, in the heat management yarn, the content of the heat management short fibers may be 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70% %, 75%, 80%, 85%, 90%, 95%, 100%. The content of other short fibers can be 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65% , 70% of one.

In the present application, the other filaments are selected from one or both of polyester filaments, nylon filaments, acrylic filaments, polypropylene filaments, polyvinyl chloride filaments, spandex filaments, vinylon filaments and viscose fibers. More than one species, preferably polyester filaments.

In the present application, when the thermal management staple fibers are blended with the other filaments, the content of the thermal management staple fibers in the thermal management yarn is 30-100%, preferably 80%-100%; The content of the other filaments in the thermal management yarn is 0-70%, preferably 0-20%. The blended content ratio of the thermal management short fibers and the other filaments is 3:7-10:0, preferably 8:2-10:0.

In a specific embodiment, in the heat management yarn, the content of the heat management short fibers is 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70% , 75%, 80%, 85%, 90%, 95%, 100%. The content of said other filaments can be 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65% , 70% of one.

In the present application, the thermal management yarn spinning process is to sequentially perform the opening and cleaning process, carding process, combing preparation process, combing process, drawing process, roving process, A spinning process to obtain the thermal management yarn.

The opening and cleaning process is to fully mix the thermal management staple fiber or the thermal management staple fiber and other staple fibers through the opener, and then output the staple fiber roll through the lapping machine, and the dry weight of the thermal management staple fiber roll is 200-400g/m.

In the carding process, the thermal management short fiber roll is carded through a carding machine to obtain a green sliver, the dry basis weight of the green sliver is 10-50g/5m, and the total draft ratio is 60-120 times.

The combing preparation process is to mix and draft the raw sliver through a pre-drawing machine and a sliver and coiling machine to obtain a semi-finished product pre-drawing and a sliver roll, and the pre-drawing weight is 10-50g/5m, The total draw ratio is 5.5-9.5 times, the roll basis weight is 30-60g/m, and the total draw ratio is 2-8 times.

In the combing process, the small rolls are further combed and combined by a comber to obtain a combed sliver, the combed sliver has a basis weight of 10-50g/5m and a total draft ratio of 60-120 times.

The drawing process is to combine and draft the combed sliver through the drawing frame once or more times to obtain the cooked sliver, the dry weight of the cooked sliver is 10-50g/5m, and the total draft ratio is 5.5- 9.5 times.

In the roving process, the cooked sliver is drawn and twisted on a roving frame to obtain a roving, the weight of the roving is 1-10g/10m, and the total drafting ratio is 5-12 times.

The spun yarn process is to further twist and draft the roving through the spinning frame to obtain a spun yarn. The draft ratio in the rear area is 1.25-1.50 times, the draft ratio in the front area is 20-29 times, and the total draft ratio is 22. -45 times.

In the present application, the roving purely spun or blended with the heat management fiber can be twisted and drawn on a spinning frame to make a heat management yarn, and can also be wrapped around other filaments to make a heat management yarn. When the thermal management staple fiber is blended with other filaments, in this step, for example, in the spinning process, a filament is introduced and wrapped together with the roving of the thermal management staple fiber, and the roving of the staple fiber wraps wrapped around the filament.

The present application also provides a thermal management fabric prepared by the above method.

In the present application, the thermal management fabric prepared by the cooling fiber has a hairiness structure (the cooling fiber is knitted or woven to form a thermal management fabric, and the interweaving structure of the yarn has a hairiness structure, that is Horizontal cooling yarns and vertical cooling yarns are knitted or woven to form an interwoven structure), which can greatly block solar radiation and have a high cooling effect while fully maintaining air permeability. That is to say, the thermal management fabric has good air permeability, and thus has a cooling effect.

The thermal management fabric prepared by the thermal management fabric, the hairiness structure of the horizontal thermal insulation fiber and the longitudinal thermal insulation fiber on the thermal management fabric interweaves and superimposes to form pores, and the pores can fix the air in the microenvironment, so that the The thermal conductivity of the thermal management fabric is reduced, which in turn has a warming effect;

The thermal management fabric prepared by the temperature control fiber has a hairiness structure, and the mechanical properties and comfort of the thermal management fabric can be improved through the hairiness structure.

The preparation method of the thermal management fabric described in this application can solve the problem that functional filaments cannot be woven directly or are difficult to weave, and can solve the problem that existing functional filaments are only used as warp or weft in weaving due to their low mechanical properties. , resulting in greatly degraded performance.

The present application also provides a thermal management mask prepared from the above thermal management fabric.

The thermal management mask includes a mask body and a tie. The mask body is provided with a thermal management functional layer, and the functional layer is prepared from the above thermal management fabric.

In the present application, the thermal management mask may be a mask with a cooling function, a mask with a warming function, or a mask with a temperature control function.

The thermal management functional layer of the mask with cooling function is prepared from a cooling fabric made of cooling fibers.

The thermal management functional layer of the mask with thermal function is prepared from thermal fabric made of thermal fiber.

The heat management functional layer of the mask with temperature control function is prepared from a temperature control fabric made of temperature control fibers.

The thermal management mask can be a single-layer, double-layer or multi-layer structure of more than three layers. Specifically, when the mask has a three-layer structure, it is a thermal management functional layer, a filter layer and a skin contact layer from outside to inside. The filter layer can be a filter layer with functions such as filtering, anti-haze, anti-virus, such as polypropylene melt-blown cloth. Specifically, the filter layer can be one layer or a multi-layer overlapping structure. The skin contact layer may be a material with skin-friendly properties, such as polypropylene spunbond.

Example

The experimental methods used in the following examples are conventional methods unless otherwise specified.

The materials and reagents used in the following examples can be obtained from commercial sources unless otherwise specified.

Example 1

Preparation of thermal fiber filaments: Dissolve 10g of polyimide in 40g of N,N-dimethylformamide, add 10g of azodicarbonamide particles and stir evenly at room temperature. Finally, the above mixed solution is extruded in water to prepare composite material fibers. The composite material fibers obtained above are fully heat-treated in an environment of 195° C. to obtain thermal fiber filaments with a porosity of 50%.

Preparation of heat-retaining short fibers: the heat-retaining fiber filaments are heated and crimped, and then cut into 32mm heat-retaining short fibers.

Preparation of heat-retaining yarn: heat-retaining staple fiber and viscose staple fiber of the same length are fully mixed through a cotton opener according to a mass ratio of 3:7, and then a 380g/m staple fiber roll is output by a lapping machine; the resulting staple fiber roll is After being carded by a carding machine, a raw sliver with a dry basis weight of 21g/5m is obtained; the gained raw sliver is mixed and drawn by a pre-draw frame and a sliver and coil combination machine, wherein the pre-draw sliver quantitative is 20g/5m, The obtained sliver quantitatively is 48g/m; The gained sliver is further combed and merged by a comber to obtain a combed sliver with a quantitative rate of 17g/5m; Obtaining the cooked sliver that the dry weight is 18g/5m; The cooked sliver is drafted and twisted by the roving frame to obtain quantitative roving of 5g/10m; Finally, the roving is further twisted and drafted to obtain 12 tex by the spinning frame Warm yarn.

Preparation of thermal fabric: Warp and weft weaving of the obtained thermal yarns to obtain thermal fabrics. The parameters of the thermal fabrics are shown in Table 1.

The difference between Example 2 and Example 10 lies in the porosity, the blending of other short fibers or other filaments, and the blending ratio, and the details of each parameter are shown in Table 1.

The difference between Comparative Example 1 and Example 4 is that the thermal filament is not cut off, and the parameters are shown in Table 1.

Prepared in Example 1 in Comparative Example 2 Chinese Patent Application CN 110387592 A, the performance parameters are shown in Table 1.

The difference between Comparative Example 3 and Example 9 is that the heat-retaining filaments are not cut, and are directly spun with polyester filaments to obtain heat-retaining yarns, and then the obtained cooling yarns are woven to obtain heat-retaining fabrics. The parameters are shown in Table 1 .

Example 11

Preparation of cooling fiber filaments: 600g of polylactic acid particles and 400g of titanium dioxide particles were melt-mixed at 210°C to prepare composite material master batches. Finally, the composite material masterbatch is dried and filled into the feed port of the melt spinning machine, and the temperature of each zone of the melt spinning machine is adjusted to 200°C, 205°C, 205°C and 205°C, and the doping amount of titanium dioxide is prepared by melt spinning 40% mass fraction of cooling fiber filaments.

Preparation of cooling short fibers: cutting the cooling fiber filaments into 32mm cooling short fibers.

The preparation of the cooling yarn: the cooling short fiber and the viscose staple fiber of the same length are fully mixed through the opener according to the mass ratio of 3:7, and then the short fiber roll of 380g/m is output by the lapping machine; the obtained short fiber roll After being carded by a carding machine, a raw sliver with a dry basis weight of 21g/5m is obtained; the gained raw sliver is mixed and drawn by a pre-draw frame and a sliver and coil combination machine, wherein the pre-draw sliver quantitative is 20g/5m, The obtained sliver quantitatively is 48g/m; The gained sliver is further combed and merged by a comber to obtain a combed sliver with a quantitative rate of 17g/5m; Obtaining the cooked sliver that the dry weight is 18g/5m; The cooked sliver is drafted and twisted by the roving frame to obtain quantitative roving of 5g/10m; Finally, the roving is further twisted and drafted to obtain 12 tex by the spinning frame Cool yarn.

Preparation of cooling fabric: Warp and weft weaving of obtained cooling yarns to obtain cooling fabric. The parameters of the cooling fabric are shown in Table 1.

The difference between Example 12-Example 20 and Example 1 lies in the mass fraction of inorganic particles, the blending of other short fibers or other filaments, and the blending ratio. See Table 1 for details of each parameter.

The difference between Comparative Example 4 and Example 14 is that the cooling fiber filaments are not cut off, and details of various parameters are shown in Table 1.

Comparative example 5 is the cooling fiber filament prepared by embodiment 5 in Chinese patent application CN 110685031 A, and each performance parameter is shown in Table 1.

The difference between Comparative Example 6 and Example 19 is that the cooling filaments in Comparative Example 7 are not cut, and are directly spun with polyester filaments to obtain cooling yarns, and then the obtained cooling yarns are used as weft yarns and warp yarns respectively. Adjust the warp and weft density and tension, and tightly weave to obtain a cooling fabric. The performance parameters are shown in Table 1.

The difference between Comparative Example 7 and Example 15 is that the cooling fiber filaments are not cut off, and details of the parameters are shown in Table 1.

Example 21

Preparation of temperature-controlled fiber filaments: Take 600g of polyvinyl alcohol and 400g of polyethylene glycol, and use deionized water as a solvent to mix them evenly to form a spinning stock solution. In the tank, it is sprayed from the spinneret at 80°C, enters the anhydrous methanol coagulation bath, and is solidified and formed at zero temperature to obtain temperature-controlled primary fibers. The as-spun fibers were stretched, dried, and heat-set to obtain a temperature-controlled fiber filament with a polyethylene glycol loading of phase change material of 40%.

Preparation of temperature-controlled staple fibers: cut temperature-controlled fiber filaments into 32 mm temperature-controlled staple fibers.

Preparation of temperature-controlled yarn: the temperature-controlled short fiber and the viscose staple fiber of the same length are fully mixed through the opener according to the mass ratio of 3:7, and then the staple fiber roll of 380g/m is output by the coiler; the obtained short After the fiber roll is carded by a carding machine, a green sliver with a dry basis weight of 21g/5m is obtained; the resulting green sliver is mixed and drawn by a pre-drawing machine and a sliver and coil combination machine, and the pre-drawing weight is 20g/5m. 5m, the obtained sliver quantitatively is 48g/m; Gained sliver is further combed and merged by the combing machine, and the combed sliver that the quantitative is 17g/5m is obtained; Drafting to obtain a cooked sliver with an evenness of 18g/5m; drawing and twisting the cooked sliver through a roving frame to obtain a roving with a fixed weight of 5g/10m; finally, further twisting and drafting the roving through a spinning frame to obtain a 12 teg Sri Lanka's temperature-controlled yarn.

Preparation of the temperature-controlled fabric: Warp and weft weaving of the obtained temperature-controlled yarn to obtain a temperature-controlled fabric. The parameters of the temperature-controlled fabric are shown in Table 1.

The difference between Example 22-Example 30 and Example 1 lies in the mass fraction of the phase change material, other short fibers or other filaments blended and the blended ratio, and the details of each parameter are shown in Table 1.

The difference between Comparative Example 8 and Example 24 is that the temperature-controlled fiber filaments are not cut off, and the details of each parameter are shown in Table 1.

Comparative Example 9 was prepared in Example 1 of Chinese Patent Application CN109234825A, and the performance parameters are shown in Table 1.

The difference between Comparative Example 10 and Example 29 is that the temperature-controlled fiber filaments are not cut, and are directly spun with polyester filaments to obtain temperature-controlled yarns, and then the obtained temperature-controlled yarns are woven to obtain temperature-controlled fabrics. See Table 1 for details of the parameters.

Bending stiffness test: take a test fabric sample to measure its mass per unit area, cut the sample into long strips and place it on the workbench of the fabric stiffness tester, and make it move at a uniform speed along the length direction through the driving mechanism, so that the sample moves from the working platform Push out and bend and sag due to its own weight, and touch the inclined plane detection line, so as to measure the protruding length, and calculate the bending stiffness according to the formula. The greater the bending stiffness, the worse the flexibility.

Air permeability test: use a fabric air flow meter to test the air permeability of the fabric when the test pressure is 100Pa and the test area is 20cm2. ^The higher the air permeability, the better the air permeability.

Yarn strength test: Take 100m of thermal management yarn and weigh it to get the grams of 10000m long yarn. The end of the yarn is clamped on a single yarn strength machine, and the breaking test is carried out at a constant speed of 200mm/min and a clamping distance of 20cm to obtain the yarn strength.

Fabric thermal conductivity test: Take two 5cm×5cm thermal fabric samples, stack the sensor and place it on the TC3000E thermal conductivity meter, and fix it with weights, set the number of repetitions, time interval and acquisition mode, and test the thermal conductivity.

Fabric reflectance test: take a 5cm×5cm cooling fabric sample, and use a UV-visible-near-infrared spectrophotometer combined with an integrating sphere to test the reflectance in the solar radiation (0.3-2.5μm) band.

Fabric phase change enthalpy test: take 15 mg of temperature-controlled fabric sample, under nitrogen atmosphere, control the heating and cooling rate of 10°C/min, and test the fiber phase change enthalpy by differential scanning calorimeter.

Table 1 is each parameter of each embodiment and comparative example

Summary: The most important parameters for the performance of the thermal management fabrics described in this application are thermal conductivity, reflectivity and phase change enthalpy. For thermal fabrics: the thermal fabrics prepared in Example 1-Example 10 all have lower thermal conductivity, and the thermal insulation effect is better. Highest porosity and porosity due to the hairy structure formed by short fibers reduces thermal conductivity and therefore provides optimum warmth retention.

For cooling fabrics: the cooling fabrics prepared in Examples 11-Example 20 all have higher reflectivity, and the cooling effect is better. The micro-nano doping amount is the highest and the hairiness structure formed by short fibers brings a light-shielding effect, reduces the light transmittance of the fabric, and then improves the reflectivity, so the cooling effect is the best.

For temperature-controlled fabrics: the temperature-controlled fabrics prepared in Examples 21-Example 30 all have higher phase change enthalpy, and the temperature control effect is better, especially the temperature-controlled fabrics in Example 24 are obtained after pure spinning of temperature-controlled short fibers , the filling amount of the internal phase change material is the highest, so the temperature control effect is the best.

In Examples 1-30, the yarn strength decreased with the increase of thermal management staple fiber content, while the thermal management yarn strength blended with filaments mainly depends on the filament strength, so the yarns blended with filaments have a higher High mechanical properties. Therefore, among the various examples of thermal management fabrics, Examples 9, 19 and 29 have the highest yarn strength, while Examples 4, 14, and 24 have the lowest yarn strength, but this yarn strength is sufficient for weaving . The thermal management filaments obtained in Comparative Examples 1, 4 and 8 cannot be braided because the strength is too low, and the preparation method of the present application can improve the yarn strength, and achieve high porosity and high inorganic micro-nano particle doping respectively. Under the premise of high phase change material filling amount, the preparation of thermal management fabric is realized.

In an embodiment, the air permeability and flexibility of the fabric are enhanced due to the cut and blend process. Therefore, comparative examples 3, 6 and 10 have lower air permeability and flexibility than their corresponding comparative examples because the thermal management filaments are not cut, and are not suitable for wearing on human skin.

Although the embodiments of the present application have been described above, the present application is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative, instructive, and not restrictive. Those skilled in the art can also make many forms under the enlightenment of this description and without departing from the protection scope of the claims of the application, and these all belong to the protection list of the application.

Claims

A method for preparing a thermal management fabric, comprising the steps of:

preparing thermal management fiber filaments;

Cutting the thermal management fiber filaments to obtain thermal management short fibers;

Spinning thermal management staple fibers to obtain thermal management yarns; the step of spinning thermal management yarns to obtain thermal management yarns is to purely spin thermal management staple fibers or blend them with other staple fibers or filaments to obtain thermal management yarns;

Weaving thermal management yarns to obtain thermal management fabrics;

The thermal management fiber filaments are selected from one of cooling fibers, warming fibers or temperature regulating fibers.
The method for preparing a thermal management fabric according to claim 1, wherein the cooling fiber is based on a polymer material and doped with inorganic micro-nano particles, and the mass of the inorganic micro-nano particles in the cooling fiber is The fraction is 40-90%, preferably 70-90%, and the mass fraction of the polymer material in the cooling fiber is 10-60%, preferably 10-30%.
The method for preparing a heat management fabric according to claim 1, wherein the heat-retaining fiber is made of a polymer material, the heat-retaining fiber has a porous structure, and the cross-section of the pore structure is circular or oval .
The method for preparing a thermal management fabric according to claim 1, wherein the temperature-regulating fiber is based on a polymer material and is doped with a phase-change material, and the mass of the phase-change material in the temperature-regulating fiber is The fraction is 40-90%, preferably 70-90%, and the mass fraction of the polymer material in the temperature-regulating fiber is 10-60%, preferably 10-30%.
The method for preparing a heat management fabric according to claim 1, characterized in that the length of the short heat management fibers is 10mm-100mm, preferably 30-50mm.
The preparation method of heat management fabric according to claim 1 or 3, characterized in that, the porosity range of the porous structure of the thermal fiber is 50-90%, preferably 75-90%, and the specific surface area is 20-90%. 100m 2 /g, preferably 30-50m 2 /g.
According to the preparation method of the heat management fabric described in any one of claim 3-5, it is characterized in that, the polymer material is selected from polylactic acid (PLA), polymethyl methacrylate (PMMA), polyethylene (PE ), Polypropylene (PP), Polyamide (PA), Polyethylene Terephthalate (PET), Polyvinylidene Fluoride (PVDF), Polyvinyl Chloride (PVC), Polystyrene (PS), Polyethylene Alcohol (PVA), polyurethane (PU), polyacrylonitrile (PAN), cellulose, chitosan, polyparaphenylene terephthalamide (PPTA), polym-phenylene isophthalamide (PMIA) ), cycloolefin copolymer (COC), polycarbonate (PC), acrylonitrile-butadiene-styrene (ABS), styrene dimethyl methacrylate copolymer (SMMA), polyoxymethylene (POM) , polyphenylene oxide (PPO) polytrimethylene terephthalate (PTT), polyvinylidene chloride resin (PVDC), polyimide (PI), vinyl acetate resin, polyvinyl acetal, poly Ester and sodium isophthalate sulfonate copolymer, acrylate copolymer, polyvinyl formal, polyvinyl acetate (PVAC), polyethylene terephthalate, meta-aramid, One or more of dibutyryl chitin (DBCH), polybenzimidazole, polybenzobisoxazole (PBO) and polyparabenamide (PBA), preferably polyimide (PI ), polylactic acid (PLA) or polyvinyl alcohol (PVA);

Preferably, the inorganic micro-nano particle material is selected from titanium dioxide (TiO 2 ), silicon dioxide (SiO 2 ), zinc oxide (ZnO), silicon carbide (SiC), silicon nitride (Si 3 N 4 ), zinc sulfide (ZnS), aluminum oxide (Al 2 O 3 ), magnesium oxide (MgO), iron oxide (Fe 2 O 3 ), boron nitride (BN), barium sulfate (BaSO 4 ), barium carbonate (BaCO 3 ) and silicon One or more than two kinds of aluminum acid (Al 2 SiO 5 ), preferably titanium dioxide (TiO 2 );

Preferably, the phase change material is selected from the group consisting of acetic acid, capric acid, myristic acid, pentadecane, palmitic acid, eicosanic acid, dodecane, tetradecane, pentadecane, hexadecane, heptadecane, Octadecane, nonadecane, eicosane, docosane, octacosane, stearic acid, palmitic acid, myristic acid, lauric acid, solid paraffin, sliced paraffin, polyol, polyethylene glycol , one or more of erythritol and polyolefin, preferably polyethylene glycol;

Preferably, the other short fibers are selected from one or more of nylon staple fibers, aramid staple fibers, acrylic staple fibers, polyester staple fibers, cotton staple fibers, and viscose staple fibers, preferably cotton staple fibers or Viscose staple fiber.
The preparation method of thermal management fabric according to claim 1, characterized in that, when the thermal management short fibers are blended with the other short fibers, the content of the thermal management short fibers in the thermal management yarn is 30-100%, preferably 80%-100%;

The content ratio of the thermal management short fiber blended with the other short fiber is 3:7-10:0, preferably 8:2-10:0.
The preparation method of heat management fabric according to claim 1, characterized in that, said other filaments are selected from polyester filaments, nylon filaments, acrylic filaments, polypropylene filaments, polyvinyl chloride filaments, spandex filaments, One or more of vinylon filaments and viscose fibers, preferably polyester filaments.
The method for preparing a thermal management fabric according to claim 9, wherein when the thermal management short fibers are blended with the other filaments, the content of the thermal management short fibers in the thermal management yarn is 30-100%, preferably 80%-100%;

The blended content ratio of the thermal management short fibers and the other filaments is 3:7-10:0, preferably 8:2-10:0.
A thermal management fabric, characterized in that it is prepared by the method according to any one of claims 1-10.
The thermal management fabric according to claim 11, characterized in that the thermal management fabric prepared by the cooling fiber has a hairiness structure on the thermal management fabric, so that the thermal management fabric has low light transmittance and High reflectivity, which in turn has a cooling effect;

The heat management fabric prepared by the heat preservation fiber, the hairiness structure of the transverse heat preservation fiber and the longitudinal heat preservation fiber on the heat management fabric are interwoven and superimposed to form pores, and the pores fix the micro-environmental air, so that the heat management fabric The thermal conductivity is reduced, which in turn has the effect of keeping warm;

The heat management fabric prepared by the temperature control fiber has a hairiness structure on the heat management fabric, thereby improving the mechanical properties and softness and comfort of the heat management fabric.
A thermal management mask, characterized in that it is prepared from the thermal management fabric according to claim 11; the thermal management fabric is prepared from cooling fibers.
The thermal management mask according to claim 13, characterized in that the mask comprises a mask body and a lace, the mask body is provided with a functional layer, and the functional layer is prepared from the thermal management fabric.