CN116676718A - Unidirectional moisture-conducting TPU elastic bandage and preparation method thereof - Google Patents
Unidirectional moisture-conducting TPU elastic bandage and preparation method thereof Download PDFInfo
- Publication number
- CN116676718A CN116676718A CN202310671218.9A CN202310671218A CN116676718A CN 116676718 A CN116676718 A CN 116676718A CN 202310671218 A CN202310671218 A CN 202310671218A CN 116676718 A CN116676718 A CN 116676718A
- Authority
- CN
- China
- Prior art keywords
- tpu
- elastic bandage
- electrostatic spinning
- melt
- woven fabric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000002121 nanofiber Substances 0.000 claims abstract description 49
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 38
- 239000004750 melt-blown nonwoven Substances 0.000 claims abstract description 35
- 239000004744 fabric Substances 0.000 claims abstract description 32
- 239000012528 membrane Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 238000007731 hot pressing Methods 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 11
- 229920002678 cellulose Polymers 0.000 claims description 9
- 239000001913 cellulose Substances 0.000 claims description 9
- 239000013081 microcrystal Substances 0.000 claims description 9
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 6
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 claims description 6
- 238000001523 electrospinning Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000009987 spinning Methods 0.000 claims description 5
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 3
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 33
- 239000011159 matrix material Substances 0.000 abstract description 15
- 210000004243 sweat Anatomy 0.000 abstract description 7
- 230000008020 evaporation Effects 0.000 abstract description 5
- 238000001704 evaporation Methods 0.000 abstract description 5
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 41
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 41
- 239000010410 layer Substances 0.000 description 27
- 239000000243 solution Substances 0.000 description 14
- 230000002209 hydrophobic effect Effects 0.000 description 9
- 239000002344 surface layer Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 238000007726 management method Methods 0.000 description 6
- 238000013329 compounding Methods 0.000 description 4
- 238000000151 deposition Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 208000025978 Athletic injury Diseases 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 206010041738 Sports injury Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 210000003423 ankle Anatomy 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 230000005068 transpiration Effects 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
- D01D5/0084—Coating by electro-spinning, i.e. the electro-spun fibres are not removed from the collecting device but remain integral with it, e.g. coating of prostheses
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/4358—Polyurethanes
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43838—Ultrafine fibres, e.g. microfibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/558—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in combination with mechanical or physical treatments other than embossing
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention relates to a unidirectional moisture-conducting TPU elastic bandage and a preparation method thereof. The elastic bandage comprises a melt-blown non-woven fabric matrix, wherein the surface of the melt-blown non-woven fabric matrix is provided with a nanofiber membrane, and the nanofiber membrane adopts two TPU materials with different elongations to form a plurality of three-dimensional spiral structures through a two-component electrostatic spinning technology. The preparation method comprises the following steps: placing the melt-blown non-woven fabric substrate on a receiving substrate of an electrostatic spinning device, forming a nanofiber membrane on the surface of the melt-blown non-woven fabric substrate through the electrostatic spinning device, and performing hot pressing to obtain the elastic bandage. The elastic bandage prepared by the invention can realize rapid evaporation of sweat on the body surface, and can effectively prevent the inner layer close to the skin from being permeated by water contained in the outer layer, so that the skin is always kept dry.
Description
Technical Field
The invention belongs to the technical field of sports bandage processing, and particularly relates to a unidirectional moisture-conducting TPU elastic bandage based on a spiral nanofiber structure and a preparation method thereof.
Background
The existing sports elastic bandage is suitable for sports, training, outdoor sports and the like, is used for protecting and strengthening joints and muscles in order to prevent sports injury, and is one of means for effectively protecting the easily injured parts such as ankles, wrists and fingers. Heat and sweat are usually generated in a large amount of sports, and the ordinary bandage has poor adsorptivity to a large amount of sweat generated during sports, so that the thermal management function is poor in a wet environment, the comfort is poor, and the sports quality is affected.
The prior patent document CN 214342925U discloses a self-adhesive elastic bandage, in particular discloses an elastic bandage which is composed of an adhesive layer, a spun-bonded non-woven fabric, cotton gauze, a melt-blown non-woven fabric and a unidirectional moisture-conducting layer and has a hierarchical structure, so that water vapor on the skin surface volatilizes in time, but the number of the composite layers of the bandage in the patent is more, and the interlayer bonding strength is uneven. For example, the number of interfacial air gaps, which are less strongly bonded between the layers, increases, which is detrimental to the continuous delivery of liquid, thereby affecting the unidirectional moisture-conducting function of the bandage.
Disclosure of Invention
The invention provides an elastic bandage with self-adaptive thermal management function in a wet environment and a preparation method thereof, which can rapidly realize unidirectional moisture conduction and asymmetric vapor transmission of bulk water and solve the problems of uneven bonding strength among multiple layers of the existing elastic bandage composite layer and discontinuous moisture conduction function.
The invention adopts the following technical scheme: the unidirectional moisture-conducting TPU elastic bandage comprises a melt-blown non-woven fabric matrix, wherein a nanofiber membrane is arranged on the surface of the melt-blown non-woven fabric matrix, and the nanofiber membrane adopts two TPU materials with different elongations to form a plurality of three-dimensional spiral structures through a two-component electrostatic spinning technology.
Further, the diameter of the spiral structure of the nanofiber membrane is 802-954nm.
The preparation method of the unidirectional moisture-guiding TPU elastic bandage comprises the following steps of
(1) Selecting a melt-blown non-woven fabric substrate and placing the melt-blown non-woven fabric substrate on a receiving substrate of electrostatic spinning equipment;
(2) Preparing electrostatic spinning solutions of two TPU materials with different elongations;
(3) Setting parameters of electrostatic spinning equipment: wherein the spinning voltage is 18-22kV, the receiving distance is set to be 12-18cm, the flow rate ratio of the electrostatic spinning solution is 1:1, the propelling speed is 0.1-0.5mL/h, the rotating speed of a roller for receiving fibers of a receiver is 30-50r/min, and the electrospinning time is 1.5-3h;
(4) Preparation of nanofiber membrane: the electrostatic spinning equipment adopts a core-shifting nozzle core needle, two components of electrostatic spinning solution form three-dimensional spiral structure nanofibers at the core-shifting nozzle core needle through high pressure action, and the three-dimensional spiral structure nanofibers are deposited and solidified on the surface of the melt-blown non-woven fabric to form nanofiber membranes;
(5) Hot pressing: and (3) placing the melt-blown non-woven fabric substrate adhered with the nanofiber membrane into a die, and performing hot press molding by adopting a vacuum film pressing machine to obtain the elastic bandage.
Further, the electrostatic spinning solution in the step (2) comprises 23-28 wt% of TPU, 5-20 wt% of cellulose microcrystal and TPU solvent.
Further, the TPU solvent is one or more of DMF, DMAc, THF, cyclohexanone and butanone.
Further, the temperature of the upper die and the lower die in the step (4) is 160-170 ℃, the hot pressing pressure is 1500-1800kg, and the hot pressing time is 3-5min.
The invention has the following advantages:
(1) The elastic bandage prepared by the invention is formed by compounding TPU (thermoplastic polyurethane) of different types serving as a main raw material through electrostatic adsorption auxiliary self-adhesion and hot pressing, and the occurrence of strong and weak bonding boundaries caused by a multilayer structure is avoided due to the reduction of the same material and the compounding times;
(2) The nanofiber layer of the elastic bandage prepared by the invention has a three-dimensional spiral structure, so that the elastic bandage contains a plurality of fiber channels, gas and water molecules can be allowed to flow easily through the channels among the fibers, and the melt-blown non-woven fabric matrix and the nanofiber membrane contained in the elastic bandage have a layered gradient structure due to the fact that the fiber diameters and the pore diameters differ by one order of magnitude, and the elastic bandage has a plant transpiration effect, so that water is rapidly and continuously extracted from the hydrophobic side of the inner layer to the hydrophilic side of the outer layer with larger specific surface area, and rapid evaporation of body surface sweat is realized;
(3) The nanofiber membrane of the elastic bandage prepared by the invention is a hydrophilic outer surface layer, the melt-blown non-woven fabric matrix is a hydrophobic inner surface layer, and the outer surface layer and the inner surface layer of the elastic bandage have obvious wettability difference in the use process, so that the inner layer close to the skin can be effectively prevented from being permeated by water contained in the outer layer, and the skin is always kept dry.
Drawings
FIG. 1 is a schematic structural view of an elastic bandage made in accordance with the present invention.
Fig. 2 is a schematic working diagram of an electrostatic spinning apparatus prepared according to the present invention.
FIG. 3 is a scanning electron microscope image of the three-dimensional helical structure of the nanofiber membrane of the elastic bandage made in accordance with the present invention.
FIG. 4 is a schematic view of the water contact angle in an elastic bandage made in accordance with the present invention.
FIG. 5 is a schematic illustration of breakthrough pressure of water inside and outside an elastic bandage made in accordance with the present invention.
FIG. 6 is a schematic representation of the relative moisture content of two sides of an elastic bandage made in accordance with the present invention as it faces upward in a moisture management test MMT when water is falling on one side of the inner nanofiber membrane.
FIG. 7 is a schematic representation of the relative moisture content of two sides of an elastic bandage made in accordance with the present invention as it faces upward in a moisture management test MMT when water is dropped onto one side of a meltblown nonwoven substrate.
FIG. 8 is a graph showing a comparison of water evaporation rates between an elastic bandage and a meltblown nonwoven substrate made in accordance with three embodiments of the present invention.
Reference numerals: the device comprises a melt-blown non-woven fabric substrate 1, a nanofiber membrane 2, a syringe pump A, a syringe pump B, a composite nozzle C, a high-voltage electrostatic generator D and a receiver E.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
A unidirectional moisture-conducting TPU elastic bandage comprises a melt-blown non-woven fabric matrix, wherein a nanofiber membrane is arranged on the surface of the melt-blown non-woven fabric matrix, and the nanofiber membrane is formed by forming a plurality of spiral structures by adopting two TPU materials with different elongations through a two-component electrostatic spinning technology.
Electrostatic spinning technology: the electrostatic spinning device is shown in fig. 2, two TPU polymer solutions with different elongations are respectively pushed by an injection pump A and an injection pump B, high voltage is applied to a composite nozzle C by a high-voltage electrostatic generator D, the negative electrode of the high-voltage electrostatic generator D is connected with a receiver E and the ground, and the fibers are collected by a roller in the receiver E. And in the experimental process, a composite nozzle C with a eccentric composite structure is adopted. The inner diameter of the core needle of the eccentric nozzle is 0.25mm, and the inner diameter of the shell needle is 0.8mm. The core-shifting nozzle is characterized in that a hole is formed in the side face of a shell needle, a core needle is inserted into the shell needle, the core needle and the shell needle are respectively used for conveying different polymer solutions, and the two polymer solutions are converged at an outlet.
The spiral structure nanofiber membrane 2 has the properties of high specific surface area and high porosity, and has other excellent properties: the spring-like structure enables the spring-like structure to have good mechanical properties; the three-dimensional helical structure provides more voids for the fibrous membrane, which allows it to possess higher porosity and capillary effect.
The electrostatic spinning solution comprises 23-28 wt% of TPU, 5-20 wt% of cellulose microcrystal and solvent for dissolving TPU, wherein the solvent for dissolving TPU is one or more of DMF, DMAc, THF, cyclohexanone and butanone.
The nanofiber membrane 2 and the melt-blown non-woven fabric 1 are formed by compounding TPU (thermoplastic polyurethane) serving as a main raw material, the compounding times are small, and the occurrence of strong and weak bonding boundaries between the membrane and the non-woven fabric layer is reduced.
Specifically, the hydrophobic melt blown TPU nonwoven 1 is placed on an electrospinning receiver E, and nanofibers are ejected from the needle under excitation of a high voltage and deposited on the receiver E. In the electrostatic spinning process, the negatively charged melt-blown nonwoven fabric 1 can be electrostatically adsorbed with the spiral-structured nanofibers emitted from the positive electrode, and simultaneously, the continuous volatilization of the solvent and the gradual solidification of the nanofibers are accompanied in the process from the formation to the deposition of the nanofibers, and the nanofibers are self-adhered on the melt-blown nonwoven fabric 1, and then undergo a hot pressing process to improve the binding force of the nanofibers.
As shown in figure 1, the elastic bandage prepared by the invention has a strong self-adaptive heat management function in a wet state. The nanofiber membrane 2 is an elastic bandage with a hydrophilic outer surface and the melt-blown non-woven fabric matrix 1 is a hydrophobic inner surface layer, the hydrophobic inner surface layer is close to the skin, and the hydrophilic outer surface layer faces air in the using process of the elastic bandage. The sweat mainly passes through the main process of melt-blowing the non-woven fabric 1 side to the nanofiber membrane 2 side, and is subjected to the synergistic effect of progressive capillary force and Laplace pressure difference, and the sweat is transported to the nanofiber membrane 2 side and rapidly spread against the hydrophobic force and the gravity, so that the elastic bandage can automatically sweat, and the cool and comfortable effect of keeping the body is achieved.
Embodiment one: two TPU materials with different breaking elongation rates, which are model numbers 1190 and 1164, are selected. The method comprises the following steps:
(1) DMF and THF are selected according to the volume ratio of 3:1, mixing and then taking the mixture as a solvent, dissolving a TPU material with the model of 1190, and placing the TPU material into an electrostatic spinning solution with the mass concentration of 23% and cellulose microcrystals of 5 wt%;
(2) DMAc is selected as a solvent to dissolve TPU material with the model of 1164, and the TPU material is placed into an electrostatic spinning solution with the mass concentration of 23 percent and 5 weight percent of cellulose microcrystals;
(3) Parameters of the electrostatic spinning equipment are set as follows; spinning voltage is 20kV, receiving distance is 15cm, flow rate ratio is 1:1, propulsion speed is 0.3mL/h, drum rotating speed is 40r/min, and electrospinning time is 2h;
(4) And (3) taking the melt-blown non-woven fabric as a matrix, opening electrostatic spinning equipment, injecting nano fibers from a core pin of a core-shifting nozzle under the excitation of high voltage, depositing the nano fibers on the surface of the melt-blown non-woven fabric in a spiral structure, forming a nano fiber film to adhere to the matrix, placing the prepared elastic bandage in a mould, performing hot press molding by adopting a vacuum film pressing machine, wherein the temperatures of an upper template and a lower template are 160 ℃, the preheating time is 5min, the hot press pressure is 1500kg, and the hot press time is 3min, so that the unidirectional moisture-guiding TPU elastic bandage is formed.
Embodiment two: two TPU materials with different elongation at break, of which the models are 1495 and 1172, are selected. The method comprises the following steps:
(1) DMF and THF are selected according to the volume ratio of 3:1, mixing and then taking the mixture as a solvent, dissolving a TPU material with the model of 1190, and placing the TPU material into an electrostatic spinning solution with the mass concentration of 25% and cellulose microcrystals of 10 wt%;
(2) DMAc is selected as a solvent to dissolve TPU material with the model of 1164, and the TPU material is placed into an electrostatic spinning solution with the mass concentration of 23 percent and 5 weight percent of cellulose microcrystals;
(3) Parameters of the electrostatic spinning equipment are set as follows; spinning voltage is 18kV, receiving distance is 12cm, flow rate ratio is 1:1, propulsion speed is 0.1mL/h, drum rotating speed is 30r/min, and electrospinning time is 1.5h;
(4) And (3) taking the melt-blown non-woven fabric as a matrix, opening electrostatic spinning equipment, injecting nano fibers from a core pin of a core-shifting nozzle under the excitation of high voltage, depositing the nano fibers on the surface of the melt-blown non-woven fabric in a spiral structure, forming a nano fiber film to adhere to the matrix, placing the prepared elastic bandage in a mold, performing hot press molding by adopting a vacuum film pressing machine, wherein the temperatures of an upper template and a lower template are 165 ℃, the preheating time is 5min, the hot press pressure is 1600kg, and the hot press time is 3min, so that the unidirectional moisture-guiding TPU elastic bandage is formed.
Embodiment III: two TPU materials with different breaking elongation rates and model numbers 1190 and 1172 are selected. The method comprises the following steps:
(1) DMF and THF are selected according to the volume ratio of 3:1, mixing and then taking the mixture as a solvent, dissolving a TPU material with the model of 1190, and placing the TPU material into an electrostatic spinning solution with the mass concentration of 28% and cellulose microcrystals of 20 wt%;
(2) DMAc is selected as a solvent to dissolve TPU material with the model of 1164, and the TPU material is placed into an electrostatic spinning solution with the mass concentration of 23 percent and 5 weight percent of cellulose microcrystals;
(3) Parameters of the electrostatic spinning equipment are set as follows; spinning voltage is 22kV, receiving distance is 18cm, flow rate ratio is 1:1, propulsion speed is 0.5mL/h, drum rotating speed is 50r/min, and electrospinning time is 3h;
(4) And (3) taking the melt-blown non-woven fabric as a matrix, opening electrostatic spinning equipment, injecting nano fibers from a core pin of a core-shifting nozzle under the excitation of high voltage, depositing the nano fibers on the surface of the melt-blown non-woven fabric in a spiral structure, forming a nano fiber film to adhere to the matrix, placing the prepared elastic bandage in a mold, performing hot press molding by adopting a vacuum film pressing machine, wherein the temperatures of an upper template and a lower template are 170 ℃, the preheating time is 5min, the hot press pressure is 1700kg, and the hot press time is 3min, so that the unidirectional moisture-guiding TPU elastic bandage is formed.
The properties of the different types of TPU materials used in examples 1-3 are shown in Table 1.
Table 1 performance parameters of four different types of TPU materials
The elastic bandages prepared in examples one, two and three were tested and the results are shown in table 2.
Table 2 elastic bandage test results
As shown in Table 2, the average fiber diameter of the spiral structure of the nanofiber membrane of the prepared elastic bandage is 312-388nm, the average diameter of the spiral structure is 802-954nm, the spiral structure and the melt-blown non-woven fabric form an asymmetric-wettability unidirectional moisture-conducting hierarchical structure, the unidirectional moisture conduction and asymmetric water vapor transmission of bulk water are realized, and the bandage has better elasticity.
As shown in fig. 4 to 5, the elastic bandage was confirmed to have unidirectional water conductivity by measuring the water contact angle and the water breakthrough pressure of the hydrophobic side of the inner layer and the hydrophilic side of the outer layer. The experiment result shows that the inner layer side of the elastic bandage has a larger water contact angle and water breakthrough pressure, the outer layer hydrophilic side shows a lower water contact angle and water breakthrough pressure, and the upper surface and the lower surface of the elastic bandage have obvious wettability difference, so that the inner layer close to the skin can be effectively prevented from being permeated by water contained in the outer layer, and the skin is always kept dry.
As shown in fig. 6-8, the directional water transmission performance of the elastic bandages of example 1 was quantified using a Moisture Management Tester (MMT). When the hydrophobic side of the inner layer is facing upwards, the water content of the upper surface remains close to zero, since the capillary force of the outer layer is strong, which can rapidly pull water from the upper surface to the lower surface. When the hydrophilic side of the outer layer is upward, the water content of the outer layer is firstly increased and then decreased, then the outer layer is stabilized at around 1551%, and the water content of the lower surface is always zero. In addition, the water position image also demonstrates this behavior of water, where light shading indicates wet areas and dark shading indicates dry areas, indicating that water is concentrated on the top surface and cannot penetrate from the outer layer to the inner layer near the skin.
The unidirectional moisture-conducting TPU elastic bandage based on a spiral nanofiber structure contains a plurality of fiber channels, gas and water molecules are allowed to flow easily through the channels between the fibers, and the fiber diameters and pore diameters of the melt-blown non-woven fabric layer and the nanofiber membrane layer contained in the elastic bandage are different by one order of magnitude, so that the bandage has a layered gradient structure, and water can be rapidly and continuously extracted from the hydrophobic side of the inner layer to the hydrophilic side of the outer layer with larger specific surface area, thereby leading to rapid evaporation of the water. The water evaporation rate of the elastic bandages prepared by measuring 3 groups of embodiments was found to be more remarkable for all 3 groups of embodiments than for the same thickness of melt blown nonwoven.
Claims (6)
1. A unidirectional moisture-conducting TPU elastic bandage, which is characterized in that: the fiber membrane is formed by two TPU materials with different elongations through a two-component electrostatic spinning technology.
2. The unidirectional moisture-transfer TPU elastic bandage of claim 1, wherein: the diameter of the spiral structure of the nanofiber membrane is 802-954nm.
3. A process for preparing a one-way moisture-transfer TPU elastic bandage as defined in claim 1, characterized by: comprises the following steps of
(1) Selecting a melt-blown non-woven fabric substrate and placing the melt-blown non-woven fabric substrate on a receiving substrate of electrostatic spinning equipment;
(2) Preparing electrostatic spinning solutions of two TPU materials with different elongations;
(3) Setting parameters of electrostatic spinning equipment: the spinning voltage is 18-22kV, the receiving distance is set to be 12-18cm, the flow rate ratio of the electrostatic spinning solution is 1:1, the advancing speed of the electrostatic spinning solution is 0.1-0.5mL/h, the rotating speed of a roller for receiving fibers of the receiver is 30-50r/min, and the electrospinning time is 1.5-3h;
(4) Preparation of nanofiber membrane: the electrostatic spinning equipment adopts a core-shifting nozzle core needle, two components of electrostatic spinning solution form three-dimensional spiral structure nanofibers at the core-shifting nozzle core needle through high pressure action, and the three-dimensional spiral structure nanofibers are deposited and solidified on the surface of the melt-blown non-woven fabric to form nanofiber membranes;
(5) Hot pressing: and (3) placing the melt-blown non-woven fabric substrate adhered with the nanofiber membrane into a die, and performing hot press molding by adopting a vacuum film pressing machine to obtain the elastic bandage.
4. A process for the preparation of a unidirectional moisture-wicking TPU elastic bandage as defined in claim 3, wherein: the electrostatic spinning solution in the step (2) consists of 23-28 wt% of TPU, 5-20 wt% of cellulose microcrystal and TPU solvent.
5. The method for preparing the unidirectional moisture-conductive TPU elastic bandage according to claim 4, wherein the method comprises the following steps: the TPU solvent is one or more of DMF, DMAc, THF, cyclohexanone and butanone.
6. A process for the preparation of a unidirectional moisture-wicking TPU elastic bandage as defined in claim 3, wherein: the temperature of the upper die and the lower die in the step (4) is 160-170 ℃, the hot pressing pressure is 1500-1800kg, and the hot pressing time is 3-5min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310671218.9A CN116676718B (en) | 2023-06-08 | 2023-06-08 | Unidirectional moisture-conducting TPU elastic bandage and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310671218.9A CN116676718B (en) | 2023-06-08 | 2023-06-08 | Unidirectional moisture-conducting TPU elastic bandage and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116676718A true CN116676718A (en) | 2023-09-01 |
| CN116676718B CN116676718B (en) | 2023-10-13 |
Family
ID=87780608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310671218.9A Active CN116676718B (en) | 2023-06-08 | 2023-06-08 | Unidirectional moisture-conducting TPU elastic bandage and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116676718B (en) |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090033588A (en) * | 2007-10-01 | 2009-04-06 | 주식회사 아모메디 | Nano-fiber composite sheet with moisture-absorption and quick-drying capability |
| JP2010084252A (en) * | 2008-09-30 | 2010-04-15 | Toray Ind Inc | Waterproof moisture-permeable laminate and waterproof moisture-permeable material using the same |
| CN102691175A (en) * | 2012-05-07 | 2012-09-26 | 北京航空航天大学 | Composite fibre membrane with unidirectional water permeable performance and preparation method thereof |
| KR20160037325A (en) * | 2014-09-26 | 2016-04-06 | 주식회사 아모그린텍 | Wound dressing materials having transfer function in one way direction and manufacturing method thereof |
| CN106222763A (en) * | 2016-09-13 | 2016-12-14 | 浙江大学 | A kind of electrostatic spinning apparatus preparing spiral micro nanometer fiber continuously and method thereof |
| CN106283389A (en) * | 2016-10-20 | 2017-01-04 | 北京服装学院 | A kind of hydrophobic/hydrophilic wellability difference composite cellulosic membrane and preparation method thereof |
| CN106930007A (en) * | 2017-02-21 | 2017-07-07 | 东华大学 | Micro nanometer fiber composite membrane with the unidirectional conducting power of moisture and preparation method thereof |
| CN107022794A (en) * | 2017-06-12 | 2017-08-08 | 曾林涛 | It is a kind of from canted coil, into twist with the fingers structure micro-nano rice fiber preparation method |
| CN108486769A (en) * | 2018-03-28 | 2018-09-04 | 中原工学院 | A kind of unidirectional moisture-inhibiting, heat-preserving complex material and preparation method thereof |
| CN108589048A (en) * | 2018-05-02 | 2018-09-28 | 北京服装学院 | Orientation capillary power drive is prepared using electrostatic spinning large area efficiently to catchment the methods of hydrophobic/hydrophilic Janus composite cellulosic membranes |
| CN110269749A (en) * | 2019-05-22 | 2019-09-24 | 东华大学 | A kind of orientation drain dressing and preparation method thereof for maintaining wound moderately to moisten |
| CN110485061A (en) * | 2018-05-15 | 2019-11-22 | 北京服装学院 | A kind of solution humidifying idle call electrostatic spinning nano fiber filler |
| CN111575904A (en) * | 2020-05-21 | 2020-08-25 | 东华大学 | Super-elastic waterproof breathable skin dressing with folded structure and preparation method thereof |
| CN112481831A (en) * | 2020-12-11 | 2021-03-12 | 江苏三丰特种材料科技有限公司 | Preparation method of multi-stage structure one-way moisture-conducting waterproof breathable film |
| CN114653227A (en) * | 2022-04-11 | 2022-06-24 | 南方科技大学 | Preparation method of nanofiber composite membrane |
| US20230063352A1 (en) * | 2021-09-01 | 2023-03-02 | City University Of Hong Kong | Unidirectional Moisturizing Nanofiber Facial Mask Substrate with Asymmetric Wettability and Preparation Thereof |
-
2023
- 2023-06-08 CN CN202310671218.9A patent/CN116676718B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090033588A (en) * | 2007-10-01 | 2009-04-06 | 주식회사 아모메디 | Nano-fiber composite sheet with moisture-absorption and quick-drying capability |
| JP2010084252A (en) * | 2008-09-30 | 2010-04-15 | Toray Ind Inc | Waterproof moisture-permeable laminate and waterproof moisture-permeable material using the same |
| CN102691175A (en) * | 2012-05-07 | 2012-09-26 | 北京航空航天大学 | Composite fibre membrane with unidirectional water permeable performance and preparation method thereof |
| KR20160037325A (en) * | 2014-09-26 | 2016-04-06 | 주식회사 아모그린텍 | Wound dressing materials having transfer function in one way direction and manufacturing method thereof |
| CN106222763A (en) * | 2016-09-13 | 2016-12-14 | 浙江大学 | A kind of electrostatic spinning apparatus preparing spiral micro nanometer fiber continuously and method thereof |
| CN106283389A (en) * | 2016-10-20 | 2017-01-04 | 北京服装学院 | A kind of hydrophobic/hydrophilic wellability difference composite cellulosic membrane and preparation method thereof |
| CN106930007A (en) * | 2017-02-21 | 2017-07-07 | 东华大学 | Micro nanometer fiber composite membrane with the unidirectional conducting power of moisture and preparation method thereof |
| CN107022794A (en) * | 2017-06-12 | 2017-08-08 | 曾林涛 | It is a kind of from canted coil, into twist with the fingers structure micro-nano rice fiber preparation method |
| CN108486769A (en) * | 2018-03-28 | 2018-09-04 | 中原工学院 | A kind of unidirectional moisture-inhibiting, heat-preserving complex material and preparation method thereof |
| CN108589048A (en) * | 2018-05-02 | 2018-09-28 | 北京服装学院 | Orientation capillary power drive is prepared using electrostatic spinning large area efficiently to catchment the methods of hydrophobic/hydrophilic Janus composite cellulosic membranes |
| CN110485061A (en) * | 2018-05-15 | 2019-11-22 | 北京服装学院 | A kind of solution humidifying idle call electrostatic spinning nano fiber filler |
| CN110269749A (en) * | 2019-05-22 | 2019-09-24 | 东华大学 | A kind of orientation drain dressing and preparation method thereof for maintaining wound moderately to moisten |
| CN111575904A (en) * | 2020-05-21 | 2020-08-25 | 东华大学 | Super-elastic waterproof breathable skin dressing with folded structure and preparation method thereof |
| CN112481831A (en) * | 2020-12-11 | 2021-03-12 | 江苏三丰特种材料科技有限公司 | Preparation method of multi-stage structure one-way moisture-conducting waterproof breathable film |
| US20230063352A1 (en) * | 2021-09-01 | 2023-03-02 | City University Of Hong Kong | Unidirectional Moisturizing Nanofiber Facial Mask Substrate with Asymmetric Wettability and Preparation Thereof |
| CN114653227A (en) * | 2022-04-11 | 2022-06-24 | 南方科技大学 | Preparation method of nanofiber composite membrane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116676718B (en) | 2023-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Almetwally et al. | Technology of nano-fibers: Production techniques and properties-Critical review | |
| KR100221709B1 (en) | Wipe materials based on multilayer blown microfibers | |
| JP6182553B2 (en) | Adhesive tape and method for producing the same | |
| CN106283389B (en) | A kind of hydrophobic/hydrophilic infiltration sex differernce composite cellulosic membrane and preparation method thereof | |
| CN108589048A (en) | Orientation capillary power drive is prepared using electrostatic spinning large area efficiently to catchment the methods of hydrophobic/hydrophilic Janus composite cellulosic membranes | |
| CN104499089A (en) | Modified polypropylene fiber and preparation method thereof | |
| TWI632259B (en) | Method for preparing moisture-absorbing transfer non-woven fabric by using spunbonding method | |
| JP2016532787A (en) | Method for producing waterproof and breathable membrane and superfine fiber web | |
| KR102109727B1 (en) | Method of manufacturing Breathable and waterproof fabric | |
| Bubakir et al. | Advances in Melt Electrospinning | |
| CN106928744B (en) | A kind of composite material containing filler, sheet material and the circuit substrate containing it | |
| CN110438666A (en) | A kind of compound melt spraying non-woven fabrics and preparation method thereof | |
| CN115323628B (en) | Antistatic flash-spun composite non-woven fabric and preparation method thereof | |
| WO2017065564A1 (en) | Liquid drug-filtering filter medium, method for producing same, and liquid drug-filtering filter module comprising same | |
| JP6028940B2 (en) | Moisture permeable waterproof fabric and manufacturing method thereof | |
| CN1886542A (en) | Needled glass mat | |
| CN114892288B (en) | Enhanced flash evaporation/electrostatic spinning composite spinning equipment | |
| CN116676718B (en) | Unidirectional moisture-conducting TPU elastic bandage and preparation method thereof | |
| KR101821937B1 (en) | Spinning nozzle, process for producing fibrous mass, fibrous mass, and paper | |
| JPH01221557A (en) | Production of carbon fiber nonwoven cloth | |
| JP2015190081A (en) | Melt-blown nonwoven fabric | |
| CN108842223B (en) | Preparation method of polyvinylidene fluoride nanofiber non-woven fabric | |
| CN106928599B (en) | A kind of ptfe composite containing filler, sheet material and the circuit substrate containing it | |
| CN108262994B (en) | Non-woven composite material based on in-situ polymerization and in-situ fiber forming and preparation method and application thereof | |
| CN101089274A (en) | Non-wowen fibric of amine polyester superfine fibre and manufacturing method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |