CN111560672B - Radiation refrigeration functional composite yarn and preparation method of fabric thereof - Google Patents
Radiation refrigeration functional composite yarn and preparation method of fabric thereof Download PDFInfo
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- CN111560672B CN111560672B CN202010261965.1A CN202010261965A CN111560672B CN 111560672 B CN111560672 B CN 111560672B CN 202010261965 A CN202010261965 A CN 202010261965A CN 111560672 B CN111560672 B CN 111560672B
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/06—Threads formed from strip material other than paper
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/36—Cored or coated yarns or threads
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
A preparation method of radiation refrigeration functional composite yarn and fabric thereof comprises the following steps: preparing a cold-feeling non-woven fabric strip; preparing a non-woven fabric strip full of micro-nano particles; preparing a cold-feeling non-woven fabric strip and a non-woven fabric strip stained with micro-nano particles into a composite fiber strip; preparing the composite fiber strip into a composite yarn core; carrying out forming processing on the composite yarn core to form composite yarn; and the composite yarn can be made into fabric. According to the invention, inorganic micro-nano particles with adjustable concentration in a large range are introduced outside and inside the yarn by using a padding method and a cladding method, so that the radiation refrigeration composite yarn and the fabric thereof suitable for cooling human skin are prepared, the preparation method is simple, the flow is short, and the problems that the existing radiation refrigeration material is not suitable for cooling human skin, the process is complex, the textile processing is difficult, and the refrigeration effect is poor are solved.
Description
Technical Field
The invention relates to the field of radiation refrigeration, in particular to radiation refrigeration functional composite yarn and a preparation method of fabric thereof.
Background
The traditional building heat regulation system usually generates huge energy consumption for dealing with extreme weather such as high temperature and the like, and causes climate problems such as greenhouse effect and the like. The demand of the cooling system is increased year by year, which not only poses serious threat to production and economy, but also greatly hinders the sustainable development of human beings. Increasing the efficiency of the cooling system by reducing the indoor temperature regulation requirements would have a significant impact on global energy usage and is a key component of energy challenges.
With the rapid development of refrigeration technology, zero-energy-consumption radiation refrigeration technology based on personal thermal management becomes the optimal choice for meeting the individual thermal comfort requirements of human bodies. The radiation refrigeration technology realizes high reflectivity of an object in a solar radiation wave band of 0.3-2.5 mu m and high emissivity in a human body heat radiation wave band of 7-14 mu m through material selection and structure design, greatly blocks the input of solar radiation heat, and simultaneously enables the human body heat to radiate to a space cold source through a middle infrared atmospheric window (8-13 mu m), thereby effectively realizing the aim of zero energy consumption and cooling, and becoming an economic and energy-saving method for meeting the heat comfort requirement.
Chinese patent CN110256924A discloses a radiation refrigeration coating and application thereof, wherein a self-repairing agent and radiation refrigeration particles are dispersed in a high molecular emulsion to prepare the radiation refrigeration coating, and metal particles are covered on the surface of the radiation refrigeration coating to serve as a thin layer, so that high reflectivity of a solar radiation wave band of 94.2% and high emissivity of an atmospheric window range of 93.9% are realized, a coating with a self-repairing function is obtained, the radiation refrigeration effect is ensured, the service life and the stability of the coating are improved, and the radiation refrigeration coating cannot be used for cooling the skin on the surface of a human body.
Chinese patent CN110628325A discloses a radiation refrigeration coating, which is composed of a reflective heat-insulating layer and a top protective layer. Uniformly mixing high-temperature radiation resistant refrigeration filler such as aluminum silicate, pearl powder, silicon dioxide, coarse whiting powder, barium sulfate, talcum powder, titanium dioxide, zinc sulfide, ceramic powder, ceramic microbeads, glass microbeads, zirconium oxide, magnesium oxide, iron black and cobalt blue and high-temperature resistant base material such as inorganic silicate resin, organic silicon resin, inorganic organic hybrid resin or water-based latex, and then coating and drying to obtain a reflective and heat-insulating layer, wherein the reflective and heat-insulating layer has a reflectivity of more than 80% for visible light and infrared light, the infrared emissivity of more than 80% in an atmospheric window band, and titanium dioxide sol in a cover surface protective layer can also absorb ultraviolet rays, and the blocking rate for the ultraviolet rays is more than 80%. The radiation refrigeration coating can be used for a long time in the environment with the temperature of minus 40 ℃ to 500 ℃, is not easy to fall off at high temperature, and has good stability, but the coating radiation refrigeration material cannot be used for cooling the human body because of the air impermeability.
Chinese patent CN110041735A discloses a spectrum selective daytime radiation refrigeration coating material, which consists of a protective layer, a reflecting layer and an infrared emission layer, silver is used as the reflecting layer material, and a silicon nitride layer (Si) is plated on the reflecting layer material3N4) The aluminum oxide single crystal of (2) serves as an infrared emitting layer. The average reflectivity of the coating material in a solar radiation wave band is larger than 0.95, the emissivity can be changed by adjusting the thickness of the silicon nitride to be 0.6-0.9, the coating material has good spectral selectivity, the structure is simple, and the refrigeration effect is obvious. Although the coating material has good effects on radiation cooling performance and can be applied to the outer surface of living goods such as buildings, vehicles or clothes in a coating mode, the coating material cannot be directly applied to human body thermal comfort regulation due to poor air permeability.
Chinese patent CN110452668A discloses a transmission type radiation refrigeration material, a film, a preparation method and application thereof, wherein ceramic particles such as Al are prepared by a sol-gel method or a solid-phase reaction method2O3、SiO2、BN、BaSO4、BaCO3、Y2SiO5Or AlPO4After surface modification, the ceramic particles are uniformly mixed with a high polymer base material, such as PEVE, TPX, PMMA or PS, and the radiation refrigeration film is prepared by adopting a casting film forming or injection molding film forming process. The film has transmittance of more than 80% in the solar spectrum range, emissivity of more than 90% in the thermal infrared band and radiation refrigeration efficiency of 30W/m2-120W/m2The solar energy water heater has the advantages that sunlight is ensured to be utilized through the solar energy water heater, a good radiation heat dissipation refrigeration effect is achieved, sunlight utilization, radiation heat dissipation and a hydrophobic self-cleaning function can be achieved, the solar energy water heater is mainly applied to devices such as solar cells, building glass, car windows, greenhouse films, communication equipment and the like, but the solar energy water heater is weak in reflection of solar radiation, does not have the daytime refrigeration capacity, lacks necessary air permeability and flexibility, and is not suitable for cooling the surface of human skin.
The invention discloses a low-cost large-area energy-consumption-free radiation refrigeration composite film and a preparation method thereof in Chinese invention patent CN109968769A, wherein the film comprises a sunlight reflecting layer, an ultraviolet absorption fluorescent layer, an infrared radiation hydrophobic layer and a protective layer from bottom to top. The composite film has the advantages of good radiation refrigeration effect, flexibility, high temperature resistance, flame retardance and the like, has good radiation refrigeration effect, has the advantages of flexibility, high temperature resistance, and the like, and can be used in the fields of building, traffic, aerospace and the like.
In chinese patent CN109705819A, a polymer film composite radiation refrigeration material added with titanium dioxide hollow spheres is disclosed, wherein a vinylidene fluoride-hexafluoropropylene copolymer is uniformly mixed with the titanium dioxide hollow spheres, and the composite radiation refrigeration film is obtained by coating and drying. The vinylidene fluoride-hexafluoropropylene copolymer matrix has good infrared radiation characteristic, and the cavity effect and the interface reflection effect of the titanium dioxide hollow sphere obviously improve the reflectivity of the film in a sunlight wave band, so that the composite film achieves good radiation refrigeration effect. Although the above-mentioned film-state materials have effective radiation cooling performance in tests and can provide heat dissipation for objects, they cannot be used for local cooling of human skin due to lack of necessary air permeability and comfort.
Compared with the coating and film state, the fiber state radiation refrigeration material has the characteristics of air and moisture permeability and flexibility, and is more suitable for human body heat management. Chinese patent CN110042564A discloses a radiation refrigeration fiber membrane, a preparation method and application thereof, and radiation particles SiO with good monodispersity and high emission2The microspheres are uniformly dispersed in a polymer solution, such as PE, PA6, PMMA, PVDF, and the radiation refrigeration fiber membrane can be obtained through electrostatic spinning. The test is carried out in the sun, the temperature of the surface of the object tightly adhered under the fiber membrane is 1.6-2.7 ℃ lower than the ambient temperature, and the fiber membrane has good radiation cooling capability,however, the method has complex process and high equipment cost, and the prepared fiber membrane has poor strength and durability, lacks of knittability and cannot replace the traditional textile clothing products.
Chinese patent CN110685031A discloses a radiation refrigeration fiber, a preparation method and application thereof, wherein functional filler such as SiO with the mass fraction of 1-17 percent is added2、SiC、TiO2、CaCO3、BaSO4、Si3N4、ZnO、Al2O3、Fe2O3、ZrO2Or jade powder, and a base material, such as polypropylene, polyvinyl alcohol, polyvinyl chloride, polyurethane, polyester, polyethylene, polyamide, polymethyl methacrylate, polyvinylidene fluoride or polyacrylonitrile, are mixed, and then the radiation refrigeration yarn is prepared by melt spinning, and the reflectivity of the obtained radiation refrigeration fabric to visible light and near infrared light is more than 60%, and the emissivity in a human body heat radiation wave band is more than 80%, so that the radiation refrigeration fabric has a cooling effect, and can be used for preparing textiles such as clothes, curtains, parasols, hats and the like with cooling requirements. However, the functional filler doped in the radiation refrigeration fiber has low mass fraction, so that the solar radiation can not be effectively blocked from being input, the heat radiation of a human body can be maximized, and the radiation refrigeration effect of the fiber is limited.
In summary, the existing patent lacks a technology for preparing radiation refrigeration functional composite yarn and fabric thereof by introducing inorganic micro-nano particles with adjustable concentration in a large range, so that the functional yarn has excellent radiation refrigeration performance and good knittability.
Disclosure of Invention
In view of the above, the invention provides a radiation refrigeration function composite yarn and a preparation method of a fabric thereof, the concentration of micro-nano particles in the radiation refrigeration function composite yarn is adjustable in a large range, the composite yarn can be used for preparing the fabric suitable for cooling a human body, and the preparation method is simple, low in cost, good in refrigeration effect and high in wearability.
In order to solve the above problems, the present invention mainly provides the following technical solutions: a preparation method of a radiation refrigeration functional composite yarn comprises the following steps:
preparing a cold-feeling non-woven fabric strip, wherein the cold-feeling non-woven fabric strip is prepared by cutting a non-woven surface material prepared by mixing cold-feeling fibers containing micro-nano particles and conventional fibers;
preparing a non-woven fabric strip which is full of micro-nano particles, wherein the non-woven fabric strip comprises a fiber strip, and the fiber strip is prepared by cutting a non-woven flexible surface material;
preparing a cold-feeling non-woven fabric strip and a non-woven fabric strip stained with micro-nano particles into a composite fiber strip;
preparing the composite fiber strip into a composite yarn core;
and forming the composite yarn core to form the composite yarn.
Preferably, the composite yarn is post-finished to form a finished composite yarn.
Preferably, the composite fiber strip is prepared by the cool non-woven fabric strip S1 and the non-woven fabric strip S2 full of micro-nano particles, and the method comprises the steps of wrapping at least one non-woven fabric strip S2 full of micro-nano particles between two cool non-woven fabric strips S1, twisting to form a sandwich composite fiber strip with built-in micro-nano particles, wherein the width of the cool non-woven fabric strip S1 is 4-8 times that of the non-woven fabric strip S2 full of micro-nano particles.
Preferably, the composite fiber strip is prepared into the composite yarn core, and the composite yarn core is formed by stably wrapping and combining the composite fiber strip and the micro-nano particle material through the drawing, unwinding, double twisting and winding effects.
Preferably, the forming processing of the composite yarn core to form the composite yarn includes the steps of drafting, carding, twisting and winding to wrap the short fiber net on the surface of the composite yarn core to form the core-shell structure composite yarn with the composite yarn core as the core and the short fiber net as the shell.
Preferably, the post-finishing of the composite yarn comprises the steps of padding, soaking and drying to place micro-nano particles in the composite yarn.
Preferably, the preparing of the cool non-woven fabric strip (S1) includes mixing the cool fibers containing the micro-nano particles with conventional fibers to form a web, preparing the cool non-woven fabric strip through a non-woven process, and cutting the cool non-woven fabric strip to obtain the cool non-woven fabric strip.
Preferably, in the radiation refrigeration functional composite yarn, the volume percentage of the micro-nano particles in the composite yarn is 0.1-50%.
Preferably, in the radiation refrigeration functional composite yarn, the particle size range of the micro-nano particles is 0.03-250 μm.
Preferably, the micro-nano particles comprise titanium dioxide (TiO)2) Silicon dioxide (SiO)2) Silicon carbide (SiC) and silicon nitride (Si)3N4) Zinc oxide (ZnO), aluminum oxide (Al)2O3) Boron Nitride (BN), barium sulfate (BaSO)4) Barium carbonate (BaCO)3) Yttrium orthosilicate (Y)2SiO5) Aluminum phosphate (AlPO)4) At least one of magnesium oxide (MgO), aluminum silicate, pearl powder, heavy calcium powder, talcum powder, zinc sulfide, ceramic powder, ceramic micro-beads, glass micro-beads, zirconium oxide, iron oxide black and cobalt blue.
Preferably, the non-woven flexible plane material comprises a non-woven plane material or a non-woven composite plane material, and the non-woven plane material or the non-woven composite plane material comprises at least one of polymethyl methacrylate (PMMA), Polyethylene (PE), polypropylene (PP), Polyamide (PA), polyethylene terephthalate (PET), polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), Polystyrene (PS), polyvinyl alcohol (PVA), Polyurethane (PU) and Polyacrylonitrile (PAN).
The composite yarn with the radiation refrigeration function is prepared by the method.
A preparation method of a radiation refrigeration functional composite yarn fabric comprises the following steps: and taking the prepared composite yarn as one of the warp and the weft, and taking the finished composite yarn as the other of the warp and the weft to prepare the composite yarn fabric.
By the technical scheme, the technical scheme provided by the invention at least has the following advantages: according to the invention, inorganic micro-nano particles with adjustable concentration in a large range are introduced outside and inside the yarn by using a padding method and a cladding method to prepare the radiation refrigeration composite yarn suitable for cooling human skin and the fabric thereof, the preparation method is simple, the flow is short, the problems that the existing radiation refrigeration material is not suitable for cooling human skin, the process is complex, the textile processing is difficult, and the refrigeration effect is poor are solved, and an effective method is provided for preparing the garment fabric with excellent radiation refrigeration performance.
Drawings
Fig. 1 is a schematic diagram of a radiation refrigeration functional composite yarn prepared by the embodiment of the invention.
Fig. 2 is a schematic diagram of a fabric woven by the radiation refrigeration function composite yarn prepared in the embodiment of the invention.
Fig. 3 is a schematic flow chart of a method for preparing a radiation refrigerating function composite yarn according to an embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides a preparation method of a radiation refrigeration functional composite yarn, which specifically comprises the following steps of:
101, preparation of Cold-feel nonwoven strips
Mixing cold-feeling fiber with conventional fiber to form web, preparing the mixed fiber into non-woven face material by non-woven processes such as needling and thermal bonding, cutting the non-woven face material to obtain cold-feeling non-woven fabric strip S1, and winding on a bobbin for packaging. The cool-sensing fiber is obtained by blending and spinning micro-nano particles and a polymer, the particle size of the micro-nano particles in the cool-sensing fiber is 0.03-250 mu m, and the mass concentration of the micro-nano particles is 1-80%.
102, preparing a non-woven fabric strip S2 full of micro-nano particles, wherein the non-woven fabric strip S2 full of micro-nano particles comprises a fiber strip, and the fiber strip is prepared by cutting a non-woven flexible surface material.
Particularly, 1021, preparing a fiber strip;
placing the non-woven flexible surface material with the surface density of 5 g/square meter to 100 g/square meter on a cutting machine, cutting the non-woven flexible surface material into fiber strips with the linear density of 50 g/kilometer to 500 g/kilometer, and respectively winding each fiber strip on a bobbin to form a fiber strip bobbin package. The width of the cool feeling non-woven fabric strip S1 is 4-8 times of the width of the fiber strip.
1022, soaking the fiber strip with the micro-nano particles to prepare a non-woven fabric strip S2;
specifically, the fiber strip bobbin roll prepared in 1021 is arranged at the rear end of a padding machine, the fiber strip unwound from the bobbin roll is immersed in micro-nano particle liquid with the particle size of 0.03-250 microns, the micro-nano particles are pressed in the structural surface of the fiber strip through padding of a padding roller set, and the non-woven fabric strip S2 full of the micro-nano particles is formed after drying. The width of the cold-feeling non-woven fabric strip S1 is 4-8 times of that of the non-woven fabric strip which is full of the micro-nano particles.
103, preparing a cold-feeling non-woven fabric strip S1 and a non-woven fabric strip S2 stained with micro-nano particles into a composite fiber strip; the method comprises the steps of wrapping at least one non-woven fabric strip S2 stained with micro-nano particles between two cool-feeling non-woven fabric strips S1, and twisting to form a sandwich-shaped composite fiber strip with the micro-nano particles inside.
Specifically, at least one non-woven fabric strip S2 full of micro-nano particles is placed between two cold-feeling non-woven fabric strips S1, and the width ratio of the non-woven fabric strip S2 full of micro-nano particles to the cold-feeling non-woven fabric strip S1 is 1:4-1: 8. And twisting the placed S1 and S2 to form a sandwich-shaped radiation refrigeration composite fiber strip with the built-in micro-nano particle material, and winding the composite fiber strip on a bobbin to form a composite fiber strip bobbin package.
104, preparing the composite fiber strip prepared in the step 103 into a composite yarn core; the method specifically comprises the steps of drawing, unwinding, double twisting and winding, so that the fiber strips and the micro-nano particle material are stably wrapped and combined to form the cylindrical composite yarn core.
The composite fiber strip bobbin roll is arranged in a yarn storage tank of a two-for-one twister, each composite fiber strip unwound from a bobbin roll respectively passes through a flyer of the two-for-one twister, enters a hollow shaft of a hollow spindle of the two-for-one twister, sequentially passes through a tensioner in the hollow shaft and a yarn inlet pipe in a positioning sleeve of the two-for-one twister, is led out from a yarn outlet pipe of a twisting disc of the two-for-one twister, passes through a yarn guide ring and enters a yarn guide roller jaw, under the combined action of the yarn guide roller jaw and the tensioner, the composite fiber strip positioned at the section from the tensioner to the yarn guide roller jaw is subjected to a drawing action force, the drawing action force draws fibers and particle materials in the composite fiber strip to extend along the length direction of the strip, the built-in particle materials are uniformly distributed in the composite fiber strip all the time, under the combined action of an inner magnet steel and a fixed magnet steel of the two-for-two, The static disc is still, the spindle belt of the two-for-one twister drives the twisting disc of the two-for-one twister to rotate at the rotating speed of 3000-7000 rpm, the tensioned composite fiber strip between the flyer and the twisting disc is twisted for the first time, the acting force of the first twisting twists the composite fiber strip three-dimensionally, the wrapping combination between the fibers in the composite fiber strip and the built-in particle materials is enhanced, the linear flaky composite fiber strip is converted into linear cylindrical yarns, the linear cylindrical yarns are led out from the outlet of the yarn bobbin of the twisting disc, and are subjected to the secondary twisting of the rotary twisting disc before entering the jaw of a yarn guide roller, the fibers in the yarns are twisted for the second time by the acting force of the secondary twisting, the wrapping combination between the fibers in the yarns and the built-in particle materials is further enhanced, and finally, yarn cores with the fineness of 30-700 tex are formed, and sequentially pass through a yarn guide hook of the two-for-one twister, A yarn guide traverse device and a grooved drum, and finally wound on a bobbin.
And 105, carrying out forming processing on the composite yarn core prepared in the step 104, preferably, wrapping the short fiber net on the surface of the composite yarn core through drafting, carding, twisting and winding to form the core-shell structure composite yarn with the composite yarn core as a core and the short fiber net as a shell.
The method specifically comprises the following steps: short fibers are made into a short fiber net to be converged with the composite yarn core, and the short fibers are twisted and continuously wrapped on the surface layer of the composite yarn core to form the composite yarn with a core-shell structure, wherein the composite yarn core is a core and the short fiber net is a shell.
The method comprises placing a bobbin yarn package of a composite yarn core on friction spinning, feeding the core yarn into a guide hook of the friction spinning machine in a manner of being parallel to a rotating shaft of a friction roller, feeding the core yarn into a space between two friction rollers rotating in the same direction, allowing a short fiber strip to pass through a drafting mechanism and a carding mechanism of the friction spinning machine in sequence, drafting and carding to form a short fiber net, continuously condensing the short fiber net on the surface between the two friction rollers in a manner of being vertical to the rotating shaft of the friction roller under the negative pressure air suction effect of the two friction rollers, converging the short fiber net with the composite yarn core between the two friction rollers, and continuously wrapping the short fiber net on the surface layer of the composite yarn core under the twisting effect of the rotation in the same direction of the two friction rollers to form the composite yarn with a core-shell structure with the composite yarn core as a core and the short fiber net as a shell, and sequentially passing through a nip roller of the yarn guide roller of the friction spinning machine, and a yarn guide roller of the, And finally, winding the yarn guide hook and the winding groove drum on a bobbin to form a composite yarn cone yarn package.
After the step 105, a step 106 of post-finishing the composite yarn may also be included, where the step is a step of post-finishing the composite yarn, and specifically includes further placing micro-nano particles in the composite yarn through post-finishing equipment by steps of padding, soaking, and drying to form a finished composite yarn.
Specifically, a plurality of compound yarn bobbin yarn packages are arranged in parallel, compound yarn unwound from the plurality of bobbin yarn packages arranged in parallel is formed into compound yarn sheet yarn arranged in parallel, the compound yarn sheet yarn is fed into a solution tank through a conveying roller, the solution tank is filled with micro-nano particle liquid with the mass fraction of more than 30% and the particle size of 0.03-250 microns, the compound yarn sheet yarn is immersed into the micro-nano particle liquid through the action of a padding roller, a compound yarn sheet yarn body sucks the micro-nano particle liquid, the padded compound yarn sheet yarn is output through an output roller, the output compound yarn sheet yarn is dried through a drying tank, and is wound through a winding roller, and finally the finishing type compound yarn weaving shaft package is formed.
The composite yarn can be made into a variety of different fabrics, such as woven fabrics, knitted fabrics, woven-knitted composite fabrics, and the like.
The preparation method of the woven fabric of the radiation refrigeration function composite yarn machine specifically comprises the step of taking the composite yarn obtained in the step 105 as one of warp yarns and weft yarns, taking the finishing type composite yarn obtained in the step 106 as the other of the warp yarns and the weft yarns, and weaving on a rapier loom to prepare the woven fabric of the radiation refrigeration function composite yarn.
Moreover, as can be understood by those skilled in the art, the above steps 101 and 102 may be interchanged in sequence, that is, the non-woven fabric strip S2 stained with micro-nano particles is prepared first, and then the cold-feeling non-woven fabric strip is prepared.
Preferably, the diameter of the micro-nano particles in the step 101 is 0.03 to 250 μm, and more preferably 0.3 to 25 μm.
The micro-nano particles comprise titanium dioxide (TiO)2) Silicon dioxide (SiO)2) Silicon carbide (SiC) and silicon nitride (Si)3N4) Zinc oxide (ZnO), aluminum oxide (Al)2O3) Boron Nitride (BN), barium sulfate (BaSO)4) Barium carbonate (BaCO)3) Yttrium orthosilicate (Y)2SiO5) Aluminum phosphate (AlPO)4) At least one or more of magnesium oxide (MgO), aluminum silicate, pearl powder, heavy calcium powder, talcum powder, zinc sulfide, ceramic powder, ceramic micro-beads, glass micro-beads, zirconium oxide, ferric oxide, iron oxide black and cobalt blue. Preferably, the micro-nano particles comprise titanium dioxide (TiO)2) Silicon dioxide (SiO)2) And zinc oxide (ZnO).
Preferably, the non-woven flexible plane material is a non-woven plane material or a non-woven composite plane material, and comprises at least one of polymethyl methacrylate (PMMA), Polyethylene (PE), polypropylene (PP), Polyamide (PA), polyethylene terephthalate (PET), polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), Polystyrene (PS), polyvinyl alcohol (PVA), Polyurethane (PU) and Polyacrylonitrile (PAN).
The radiation refrigeration functional composite yarn prepared by the method comprises a cool-sensitive fiber strip S1 positioned in the center, a non-woven fabric strip S2 coated with micro-nano particles and wrapped on the outer side of the cool-sensitive fiber strip S1, and a layer of cool-sensitive fiber strip S1 wrapped on the outermost side, and is in a three-layer sandwich shape as shown in figure 1.
The fineness range of the radiation refrigeration function composite yarn is 30-700 tex, and preferably, the fineness range of the radiation refrigeration function composite yarn is 200-600 tex.
And the volume fraction of the micro-nano particles in the radiation refrigeration functional composite yarn is 0.1-50%. Preferably, the mixing amount of the micro-nano particles is 5-30 vol.%.
According to the invention, inorganic micro-nano particles with adjustable concentration in a large range are introduced outside and inside the yarn through a padding method and a coating method, so that the radiation refrigeration composite yarn suitable for cooling human skin and the fabric thereof are prepared, the preparation method is simple, the flow is short, the problems that the existing radiation refrigeration material is not suitable for cooling human skin, the process is complex, the textile processing is difficult, and the refrigeration effect is poor are solved, and an effective method is provided for preparing clothing textiles with excellent radiation refrigeration performance.
Example 1:
in this embodiment, the base material of the radiation refrigeration functional composite yarn prepared by the method is a Polyethylene (PE) non-woven flexible fiber tape, and the doped inorganic micro-nano particles are TiO2The average grain diameter is about 600nm and accounts for 5 percent of the total volume of the radiation refrigeration functional composite yarn.
The preparation method comprises the specific steps of 101, preparing a cold-feeling non-woven fabric strip S1;
TiO with the grain diameter of 0.03-250 mu m and the mass concentration of 1-80 percent is doped2Mixing the cold-sensitive fiber of the micro-nano particles with conventional fiber to form a web, preparing the mixed fiber into a non-woven surface material through non-woven processes such as needling, thermal bonding and the like, cutting the non-woven surface material to prepare a cold-sensitive non-woven fabric strip S1, and winding the cold-sensitive non-woven fabric strip S1 on a bobbin for rolling.
102, preparing a non-woven fabric strip S2 stained with micro-nano particles; the method comprises the following steps:
1021, preparing fiber strips, namely cutting the polyethylene non-woven flexible surface material with the surface density of 5 g/square meter into uniform fiber strips with the linear density of 50 g/kilometer and the width of 10 mm by using a cutting machine, and respectively winding each fiber strip on a bobbin to form a strip bobbin package.
1022, the result obtained in step 1021The fiber strip bobbin is arranged at the rear end of the padding machine, and the fiber strip unwound from the bobbin package is immersed into TiO with the average particle diameter of 600nm2In the micro-nano particle liquid, TiO is padded by a padding roller set2Pressing the micro-nano particles in the structural surface of the fiber strip, and drying to form a coating with TiO2And (4) a non-woven fabric strip S2 of the micro-nano particles.
103, preparing a cold-feeling non-woven fabric strip S1 prepared in the step 101 and a non-woven fabric strip S2 stained with micro-nano particles into a composite fiber strip;
specifically, a 2.5 mm wide piece of TiO is impregnated2The non-woven fabric strip S2 of the micro-nano particles is placed between the two cold-sensitive non-woven fabric strips S1, S1 completely covers S2, the non-woven fabric strips S2 are twisted to form a sandwich-shaped radiation refrigeration composite fiber strip with a fiber strip and a built-in particle material, the composite fiber strip is wound on a bobbin, and a composite fiber strip bobbin package is formed.
S104, preparing a composite yarn core;
the composite fiber strip bobbin packages are respectively placed in a yarn storage tank of a two-for-one twister, each composite fiber strip unwound from the bobbin packages respectively passes through a flyer of the two-for-one twister, enters a hollow shaft of a hollow spindle of the two-for-one twister, sequentially passes through a tensioner in the hollow shaft and a yarn inlet pipe in a positioning sleeve of the two-for-one twister, is led out from a yarn outlet pipe of a twisting disc of the two-for-one twister, then passes through a yarn guide ring and enters a yarn guide roller jaw, and under the combined action of the yarn guide roller jaw and the tensioner, the composite fiber strip positioned from the tensioner to the yarn guide roller jaw section is subjected to a drawing acting force which draws polyethylene fibers and TiO in the composite fiber strip2The particles extend along the length of the strip and are embedded with TiO2The particles are uniformly distributed in the composite fiber strip all the time, under the common use of the inner magnetic steel and the fixed magnetic steel of the two-for-one twister, the yarn storage tank and the static disc of the two-for-one twister are static, the spindle tape of the two-for-one twister drives the twisting disc of the two-for-one twister to rotate at the rotating speed of 7000 revolutions per minute, the tensioned composite fiber strip between the flyer and the twisting disc is twisted once, the composite fiber strip is twisted three-dimensionally, and the polyethylene fibers and TiO in the reinforced composite fiber strip are reinforced2The wrapping and bonding between the particles willThe linear sheet-like composite fiber ribbon is converted into a linear cylindrical yarn. TiO 22The particles are firmly fixed in the center of the yarn body, the linear cylindrical yarn is led out from the outlet of the yarn outlet tube of the twisting disc, and is subjected to secondary twisting of the rotary twisting disc before entering the nip of the yarn leading roller, the internal fiber of the yarn is three-dimensionally twisted, and the polyethylene fiber and the built-in TiO in the yarn are further enhanced2Wrapping and combining the particles to finally prepare the product with the fineness of 200 tex and TiO2The total volume of the radiation refrigeration function composite yarn accounts for 5 percent.
105, forming the composite yarn core obtained in the step 104 to form a composite yarn;
the bobbin yarn of the composite yarn core is coiled and placed on the friction spinning, the core yarn of the friction spinning machine is fed into a yarn guide hook, and is fed into the space between two friction rollers rotating in the same direction in a mode of being parallel to the rotating shaft of the friction rollers, the short fiber strips are sequentially drafted and combed into a short fiber net through a drafting mechanism and a carding mechanism of the friction spinning machine, the short fiber net is continuously condensed on the surface between the two friction rollers in a mode of being vertical to the rotating shaft of the friction rollers under the negative pressure air suction effect of the two friction rollers and is converged with the composite yarn core positioned between the two friction rollers, the short fiber net converged with the composite yarn core is continuously wrapped on the surface layer of the composite yarn core under the same-direction rotating twisting effect of the two friction rollers to form the core-shell structure composite yarn with the composite yarn core as a core and the short fiber net as a shell, and the composite yarn is sequentially fed through a yarn guide roller jaw of the friction spinning machine, And finally, winding the yarn guide hook and the winding groove drum on a bobbin to form a composite yarn cone yarn package.
106, after finishing of the composite yarn;
feeding the composite yarn obtained in the step 105 into a solution tank through a conveying roller, wherein the solution tank is filled with micro-nano particle liquid with the mass fraction of more than 30% and the particle size of 0.03-250 microns, the composite yarn is immersed into the micro-nano particle liquid under the action of a padding roller, a composite yarn body sucks the micro-nano particle liquid, the padded composite yarn is output through an output roller, the output composite yarn is dried through a drying tank and wound through a winding roller, and finally a finishing type composite yarn weaving shaft package is formed;
preparing a composite yarn woven fabric with a radiation refrigeration function;
and taking the composite yarn obtained in the step 105 as warp yarn and the finishing type composite yarn obtained in the step 106 as weft yarn, and weaving on a rapier loom to prepare the woven fabric of the composite yarn with the radiation refrigeration function.
The radiation refrigeration function composite yarn prepared in the embodiment is shown in fig. 2, and the obtained radiation refrigeration function composite yarn woven fabric is shown in fig. 3, and the test shows that the high reflectivity can be realized in the solar radiation wave band, the solar radiation input can be effectively blocked, and the good radiation refrigeration performance can be realized.
Example 2
In this embodiment, the base material of the radiation refrigeration functional composite yarn is a polypropylene (PP) non-woven flexible fiber strip, and the doped inorganic micro-nano particles are TiO2The average particle size is about 600nm and accounts for 5 percent of the total volume of the composite yarn.
The preparation method specifically comprises the following steps:
101, preparing a cold-feeling non-woven fabric strip S1; the specific procedure was the same as in example 1,
102, preparing a non-woven fabric strip S2 stained with micro-nano particles; the method comprises the following steps:
1021, preparation of the fiber band,
the polypropylene non-woven flexible surface material with the surface density of 5 g/square meter is cut into uniform fiber strips with the linear density of 50 g/kilometer and the width of 10 millimeters by a cutting machine, and each fiber strip is respectively wound on a bobbin to form a strip bobbin package.
1022, the fiber strip is stained with the micro-nano particles, and the specific steps are the same as those in the example 1.
103, preparing the cool-feeling non-woven fabric strip S1 prepared in the step 101 and the non-woven fabric strip S2 dipped with the micro-nano particles into a composite fiber strip, and the specific steps are the same as the example 1.
104, preparing a composite yarn core; the specific procedure was the same as in example 1. Finally preparing the product with the fineness of 600 tex and TiO2Total volume ofAnd 30% of radiation refrigeration function composite yarn.
105, forming and processing the composite yarn; the specific procedure is the same as in example 1.
106, after finishing of the composite yarn; the specific procedure is the same as in example 1.
Similarly, TiO was prepared in the same manner as in example 1, except that the composite yarn obtained in step 105 was used as the weft and the composite yarn obtained in step 106 was used as the warp2The total volume of the woven fabric of the radiation refrigeration functional composite yarn accounts for 30 percent.
The radiation refrigeration performance of the textiles made of the radiation refrigeration function composite yarns of the above examples 1 and 2 were compared. Example 2 the doping level prepared was 30 vol.% TiO2The weighted reflectivity of the radiation refrigeration function composite yarn fabric in the solar radiation waveband is greater than that of the radiation refrigeration function composite yarn fabric prepared in the embodiment 1 with the doping amount of 5 vol.%, so that the reflectivity of the solar radiation waveband can be improved by introducing inorganic particles such as titanium dioxide with proper particle sizes into the yarn and outside the yarn, and excellent radiation refrigeration performance is realized. Meanwhile, the method combining padding and coating can realize large-range adjustment of the concentration of the micro-nano particles in the yarn, and is suitable for different radiation refrigeration textile application scenes.
Example 3
In the embodiment, the base material of the radiation refrigeration functional composite yarn is a Polyamide (PA) non-woven flexible fiber strip, and the doped inorganic micro-nano particles are TiO2And SiO2，TiO2Has an average particle diameter of about 600nm, SiO2The particle size range of the composite yarn is 0.3-25 mu m, and the micro-nano particles account for 50% of the total volume of the composite yarn.
The preparation method comprises the following specific steps:
101, preparing a cold-feeling non-woven fabric strip S1; the specific procedure was the same as in example 1.
102, preparing a non-woven fabric strip S2 stained with micro-nano particles; the method comprises the following steps:
1021, preparing a fiber strip; the preparation method is the same as example 1.
1022, soaking the fiber strip with the micro-nano particles, and soaking the fiber strip obtained in the step 1021The bobbin with bobbin is arranged at the rear end of the padding machine, and the fiber strip unwound from the bobbin package is immersed into TiO2-SiO2Mixing micro-nano particle solution and TiO in the micro-nano particle solution2With SiO2The mass ratio of TiO is 3:1, and TiO is padded by a padding roller group2-SiO2Pressing the mixed micro-nano particles in the structural surface of the fiber strip, and drying to form a coating of TiO2-SiO2And (4) mixing a non-woven fabric strip S2 of the micro-nano particles.
103, preparing a cold-feeling non-woven fabric strip S1 prepared in the step 101 and a non-woven fabric strip S2 stained with micro-nano particles into a composite fiber strip;
2.5 mm wide is impregnated with TiO2-SiO2The non-woven fabric strip S2 mixed with the micro-nano particles is arranged in the middle of the cool feeling non-woven fabric strip S1, and the edge line of one side of the S2 is superposed with the central line of the cool feeling non-woven fabric strip S1. And placing the placed S1 and S2 into a trough, and soaking the trough with TiO2-SiO2After entering a belt feeding groove, the non-woven fabric strip S2 mixed with the micro-nano particles is folded in half along the center line of S1 to form a sandwich-shaped radiation refrigeration composite fiber strip with a fiber strip internally provided with a particle material, and the composite fiber strip is wound on a bobbin to form a composite fiber strip bobbin package.
104, preparing a composite yarn core;
respectively placing the bobbin packages of the composite fiber strips prepared in the step 103 in a yarn storage tank of a two-for-one twister, respectively enabling each composite fiber strip unwound from the bobbin packages to pass through a flyer of the two-for-one twister, enter a hollow shaft of a hollow spindle of the two-for-one twister, sequentially pass through a tensioner in the hollow shaft and a yarn inlet pipe in a positioning sleeve of the two-for-one twister, be led out from a yarn outlet pipe of a twisting disc of the two-for-one twister, pass through a yarn guide ring and enter a yarn guide roller jaw, and under the combined action of the yarn guide roller jaw and the tensioner, the composite fiber strips positioned from the tensioner to the yarn guide roller jaw are subjected to a traction acting force, and the traction acting force pulls polyethylene fibers and TiO inside the composite fiber strips2-SiO2The mixed particles extend along the length direction of the strip and are internally provided with TiO2-SiO2The mixed particles are uniformly distributed in the composite fiber strip all the time and are arranged in a two-for-one twisterUnder the common use of inner magnetic steel and fixed magnetic steel, the yarn storage tank and the static disc of the two-for-one twister are static, the spindle tape of the two-for-one twister drives the twisting disc of the two-for-one twister to rotate at the rotating speed of 7000 rpm, the tensioned composite fiber strip positioned between the spindle wing and the twisting disc is twisted for one time, the composite fiber strip is twisted three-dimensionally, and polyethylene fibers and TiO in the reinforced composite fiber strip are reinforced2-SiO2The wrapping and bonding between the mixed particles transforms the linear sheet-like composite fiber strip into a linear cylindrical yarn. TiO 22-SiO2The mixed particles are firmly fixed at the center of the yarn body, the linear cylindrical yarn is led out from the outlet of the yarn outlet tube of the twisting disc, and is subjected to secondary twisting of the rotary twisting disc before entering the jaw of the yarn leading roller, the internal fiber of the yarn is twisted in a three-dimensional manner, and the polyethylene fiber and the built-in TiO in the yarn are further enhanced2-SiO2Wrapping and combining the mixed particles to finally prepare the product with the fineness of 700 tex and TiO2-SiO2The total volume of the mixed particles is 50 percent of the radiation refrigeration function composite yarn.
105, forming and processing the composite yarn; the specific procedure is the same as in example 1.
106, after finishing of the composite yarn; the specific procedure is the same as in example 1.
The composite yarn produced by the method of this example can produce TiO with the composite yarn in 106 as the weft and the composite yarn in 105 as the warp2-SiO2The mixed particle volume accounts for 50% of the woven fabric of the radiation refrigeration functional composite yarn.
And (3) comparing the radiation refrigeration performance of the radiation refrigeration function composite yarn fabrics of the embodiments 1, 2 and 3. Example 3 the doping level prepared was 50% TiO2-SiO2The reflectivity of the functional composite yarn fabric of the mixed particles in a solar radiation wave band and the infrared emissivity of the functional composite yarn fabric in a human body thermal radiation wave band are both larger than those of the radiation refrigeration fabrics of the embodiments 1 and 2, so that the micro-nano particles are introduced into the yarn and outside the yarn, the reflectivity of the solar radiation wave band can be greatly improved, and the radiation of a human body to an external cold source is facilitated. Meanwhile, the concentration of micro-nano particles in the yarn can be realized by a method combining padding and claddingCan be adjusted in a large range, can maximally block solar radiation energy input and greatly enhance the heat radiation loss of a human body, thereby realizing excellent radiation refrigeration performance.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (12)
1. A preparation method of a radiation refrigeration functional composite yarn comprises the following steps:
preparing a cold-feeling non-woven fabric strip (S1), wherein the cold-feeling non-woven fabric strip is prepared by cutting a non-woven fabric material prepared by mixing cold-feeling fibers containing micro-nano particles and conventional fibers;
preparing a non-woven fabric strip (S2) stained with micro-nano particles, wherein the non-woven fabric strip (S2) comprises a fiber strip, and the fiber strip is prepared by cutting a non-woven flexible surface material;
preparing a cold-feeling non-woven fabric strip (S1) and a non-woven fabric strip (S2) which is full of micro-nano particles into a composite fiber strip;
preparing the composite fiber strip into a composite yarn core;
and forming the composite yarn core to form the composite yarn.
2. The method for preparing a radiation refrigerating function composite yarn as claimed in claim 1, wherein: also comprises
And carrying out after-treatment on the composite yarn to form a finishing type composite yarn.
3. The method for preparing a radiation refrigerating function composite yarn as claimed in claim 1, wherein: the method is characterized in that the cold-feeling non-woven fabric strips (S1) and the non-woven fabric strips (S2) full of the micro-nano particles are made into composite fiber strips, at least one non-woven fabric strip (S2) full of the micro-nano particles is wrapped between two cold-feeling non-woven fabric strips (S1), the composite fiber strips are twisted to form sandwich-shaped composite fiber strips with the micro-nano particles inside, and the width of each cold-feeling non-woven fabric strip (S1) is 4-8 times that of the non-woven fabric strip (S2) full of the micro-nano particles.
4. The method for preparing a radiation refrigerating function composite yarn as claimed in claim 1, wherein: the composite yarn core is prepared from the composite fiber strip, and the composite fiber strip and the micro-nano particle material are stably wrapped and combined through the drawing, unwinding, double twisting and winding effects to form the composite yarn core.
5. The method for preparing a radiation refrigerating function composite yarn as claimed in claim 1, wherein: the method for forming the composite yarn core comprises the steps of wrapping a short fiber net on the surface of the composite yarn core through the steps of drafting, carding, twisting and winding to form the core-shell structure composite yarn with the composite yarn core as a core and the short fiber net as a shell.
6. The method for preparing a radiation refrigerating function composite yarn as claimed in claim 2, wherein: and performing after-finishing on the composite yarn, wherein the steps of padding, soaking and drying are utilized to place micro-nano particles in the composite yarn.
7. The method for preparing a radiation refrigerating function composite yarn as claimed in claim 1, wherein: the preparation of the cold-feeling non-woven fabric strip (S1) comprises the steps of mixing the cold-feeling fibers containing the micro-nano particles with conventional fibers to form a net, preparing the cold-feeling non-woven fabric strip through a non-woven process, and cutting the cold-feeling non-woven fabric strip to obtain the cold-feeling non-woven fabric strip.
8. A method for preparing a radiation refrigerating function composite yarn as claimed in any one of claims 1 to 7, wherein: in the radiation refrigeration functional composite yarn, the volume percentage of micro-nano particles in the composite yarn is 0.1-50%.
9. A method for preparing a radiation refrigerating function composite yarn as claimed in any one of claims 1 to 7, wherein: in the radiation refrigeration functional composite yarn, the particle size range of micro-nano particles is 0.03-250 μm.
10. A method for preparing a radiation refrigerating function composite yarn as claimed in any one of claims 1 to 7, wherein: the micro-nano particles comprise titanium dioxide (TiO)2) Silicon dioxide (SiO)2) Silicon carbide (SiC) and silicon nitride (Si)3N4) Zinc oxide (ZnO), aluminum oxide (Al)2O3) Boron Nitride (BN), barium sulfate (BaSO)4) Barium carbonate (BaCO)3) Yttrium orthosilicate (Y)2SiO5) Aluminum phosphate (AlPO)4) At least one of magnesium oxide (MgO), aluminum silicate, pearl powder, heavy calcium powder, talcum powder, zinc sulfide, ceramic powder, ceramic micro-beads, glass micro-beads, zirconium oxide, iron oxide black and cobalt blue;
the non-woven flexible plane materiel comprises a non-woven plane materiel or a non-woven composite plane materiel, wherein the non-woven plane materiel or the non-woven composite plane materiel comprises at least one of polymethyl methacrylate (PMMA), Polyethylene (PE), polypropylene (PP), Polyamide (PA), polyethylene terephthalate (PET), polyvinylidene fluoride (PVDF), polyvinyl chloride (PVC), Polystyrene (PS), polyvinyl alcohol (PVA), Polyurethane (PU) and Polyacrylonitrile (PAN).
11. A radiation-cooled functional composite yarn prepared by the process of any one of claims 1-10.
12. A preparation method of a radiation refrigeration functional composite yarn fabric comprises the following steps:
a composite yarn fabric is produced by using the composite yarn produced in claim 1 as one of the warp and the weft and the finished composite yarn produced in claim 2 as the other of the warp and the weft.
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| CN115449758A (en) * | 2022-07-12 | 2022-12-09 | 电子科技大学 | Flexible radiation refrigeration material and preparation method thereof |
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Effective date of registration: 20230712 Address after: Room 50815, Gaoke Building, No. 18 Huaguang Avenue, Guandong Science and Technology Industrial Park, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430223 Patentee after: Wuhan Xinrunxing Material Technology Co.,Ltd. Address before: 430070 No. 1037 Luoyu Road, Hongshan District, Wuhan City, Hubei Province Patentee before: HUAZHONG University OF SCIENCE AND TECHNOLOGY |