CN114561807A - Elastic non-woven fabric and medical adhesive tape applying same - Google Patents
Elastic non-woven fabric and medical adhesive tape applying same Download PDFInfo
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- CN114561807A CN114561807A CN202210120990.7A CN202210120990A CN114561807A CN 114561807 A CN114561807 A CN 114561807A CN 202210120990 A CN202210120990 A CN 202210120990A CN 114561807 A CN114561807 A CN 114561807A
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- polyurethane
- woven fabric
- elastic
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- based polyurethane
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 103
- 239000002390 adhesive tape Substances 0.000 title claims abstract description 24
- 229920002635 polyurethane Polymers 0.000 claims abstract description 128
- 239000004814 polyurethane Substances 0.000 claims abstract description 128
- 229920003225 polyurethane elastomer Polymers 0.000 claims abstract description 56
- 229920006306 polyurethane fiber Polymers 0.000 claims abstract description 44
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 38
- 239000004626 polylactic acid Substances 0.000 claims abstract description 38
- 239000002131 composite material Substances 0.000 claims abstract description 36
- 239000002674 ointment Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 238000005470 impregnation Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 36
- 239000000243 solution Substances 0.000 claims description 25
- 239000010410 layer Substances 0.000 claims description 17
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000011256 inorganic filler Substances 0.000 claims description 10
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 9
- 239000002041 carbon nanotube Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 6
- 230000015271 coagulation Effects 0.000 claims description 6
- 238000005345 coagulation Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 238000007654 immersion Methods 0.000 claims description 4
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 229910021392 nanocarbon Inorganic materials 0.000 claims description 3
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 3
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 3
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 3
- 241001391944 Commicarpus scandens Species 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 description 87
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 31
- 229920001610 polycaprolactone Polymers 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 16
- 229920005862 polyol Polymers 0.000 description 8
- 150000003077 polyols Chemical class 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- 238000011084 recovery Methods 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 4
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011505 plaster Substances 0.000 description 4
- -1 polypropylene Polymers 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000002009 diols Chemical class 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000004632 polycaprolactone Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229940008841 1,6-hexamethylene diisocyanate Drugs 0.000 description 1
- 206010050031 Muscle strain Diseases 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000012748 slip agent Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000008736 traumatic injury Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/02—Adhesive bandages or dressings
- A61F13/0269—Tapes for dressing attachment
-
- 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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
-
- 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
- D04H1/43825—Composite fibres
- D04H1/4383—Composite fibres sea-island
-
- 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
- D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/02—Setting
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Epidemiology (AREA)
- General Chemical & Material Sciences (AREA)
- Materials For Medical Uses (AREA)
Abstract
The invention discloses an elastic non-woven fabric and a medical application adhesive tape using the same, wherein the elastic non-woven fabric is prepared by impregnating a polyurethane-based non-woven fabric with an aqueous polyurethane impregnation solution, and the polyurethane-based non-woven fabric comprises the following components in parts by weight: 60-70 parts of elastic polyurethane fiber, 25-38 parts of composite polyurethane elastomer and 1-5 parts of slipping agent, wherein the composite polyurethane elastomer comprises polylactic acid-based polyurethane, PCDL-based polyurethane and PCL-based polyurethane, and the weight ratio of the polylactic acid-based polyurethane to the PCDL-based polyurethane is 1 (0.72-1.26) to 0.25-0.5. The medical application adhesive tape comprises an ointment attaching layer and a non-woven fabric pasting layer, wherein the ointment attaching layer is pasted on the non-woven fabric pasting layer, and the non-woven fabric pasting layer is made of the elastic non-woven fabric. The elastic non-woven fabric has excellent elasticity and is not easy to break at 35-45 ℃, and the medical application adhesive tape prepared from the elastic non-woven fabric has high elasticity and is not easy to fall off after being pasted.
Description
Technical Field
The invention relates to the technical field of medical adhesive tapes, in particular to an elastic non-woven fabric and a medical adhesive tape applying the elastic non-woven fabric.
Background
The application is a more common treatment method, and when a patient suffers from traumatic injury, muscle strain, scald and other diseases, the application is often adopted for treatment. The application method is that the prepared ointment is smeared on gauze and then is applied to the affected part, and the plaster has the characteristic of quick response. The medical adhesive tape is a novel sticky bandage, ointment is smeared on the medical adhesive tape, and then the medical adhesive tape is directly pasted on the skin, so that the medical adhesive tape is more convenient and faster.
In the related technology, the medical application adhesive tape comprises an ointment attachment layer and a non-woven fabric pasting layer, wherein the ointment attachment layer is pasted on the non-woven fabric pasting layer, ointment is pasted on the ointment attachment layer, then the ointment attachment layer covers the affected part, and then the non-woven fabric pasting layer is pasted on the skin, so that the medical application adhesive tape is completed. The non-woven fabric adhesive layer is a non-woven fabric with part of the part coated with adhesive and is generally made of polypropylene, terylene or polypropylene.
In view of the above-mentioned related technologies, the inventor believes that the non-woven fabric adhesive layer made of polypropylene, polyester or polypropylene has poor elasticity, and when the medical application tape is attached, the medical application tape is easily attached insecurely.
Disclosure of Invention
In order to improve the elasticity of medical adhesive tape that applies ointment or plaster, this application provides an elasticity non-woven fabrics and uses medical adhesive tape that applies ointment or plaster of this elasticity non-woven fabrics.
In a first aspect, the present application provides an elastic nonwoven fabric, which adopts the following technical scheme:
an elastic non-woven fabric is prepared by impregnating a polyurethane-based non-woven fabric with a water-based polyurethane impregnation solution, wherein the polyurethane-based non-woven fabric comprises the following components in parts by weight: 60-70 parts of elastic polyurethane fiber, 25-38 parts of composite polyurethane elastomer and 1-5 parts of slipping agent, wherein the composite polyurethane elastomer comprises polylactic acid-based polyurethane, PCDL-based polyurethane and PCL-based polyurethane, and the weight ratio of the polylactic acid-based polyurethane to the PCDL-based polyurethane is 1 (0.72-1.26) to 0.25-0.5.
By adopting the technical scheme, the polylactic acid-based polyurethane has high elastic recovery rate and good elasticity, but has low tensile strength and elongation at break, and is easy to break in the stretching process. The PCDL-based polyurethane is a polyurethane prepared from a polycarbonate diol as a polyol, and has high tensile strength and elongation at break, and is not easily broken during stretching, but has low elastic recovery rate and small elasticity.
When the elastic body obtained by compounding the polylactic acid-based polyurethane and the PCDL-based polyurethane is used for preparing the elastic non-woven fabric, the elasticity of the obtained elastic non-woven fabric is still small, and the elastic non-woven fabric is easy to fall off after being attached to the skin for a period of time; the inventor compounds polylactic acid-based polyurethane, PCDL-based polyurethane and PCL-based polyurethane, and adjusts the weight ratio of the polylactic acid-based polyurethane, the PCDL-based polyurethane and the PCL-based polyurethane to the above range, so that the tensile strength and the elongation at break of the obtained composite polyurethane elastomer are higher than those of the polylactic acid-based polyurethane, the difference between the elastic recovery rate and the polylactic acid-based polyurethane is smaller, and the elastic non-woven fabric prepared by adopting the composite polyurethane elastomer has excellent elasticity at 35-45 ℃, is not easy to break, and can not fall off for a long time after being pasted on skin. Consequently, the medical adhesive tape that applies ointment or plaster that adopts the preparation of this application's elasticity non-woven fabrics has higher elasticity, is difficult for droing after pasting and covering.
In a specific possible embodiment, the composite polyurethane elastomer further comprises a nano inorganic filler, and the weight ratio of the polylactic acid-based polyurethane to the nano inorganic filler is 1 (0.005-0.02).
By adopting the technical scheme, the nano inorganic filler is added, the temperature resistance and the ageing resistance of the composite polyurethane elastomer can be enhanced, and the inventor finds that the influence of the nano inorganic filler on the elastic recovery rate of the composite polyurethane elastomer can be effectively reduced by controlling the addition amount of the nano inorganic filler in the range, the prepared composite polyurethane elastomer not only has excellent elasticity, but also has small elasticity change after long-time use at 35-45 ℃, and the elastic non-woven fabric prepared from the composite polyurethane elastomer can be used for multiple times.
In a specific possible embodiment, the nano inorganic filler includes at least one of nano calcium carbonate, nano titanium dioxide and nano carbon black.
By adopting the technical scheme, the high-temperature resistance and ultraviolet aging resistance of the composite polyurethane elastomer can be improved by the nano calcium carbonate, the nano titanium dioxide and the nano carbon black, and the durability of the elasticity of the elastic non-woven fabric is improved.
In a specific embodiment, the syntactic polyurethane elastomer is prepared according to the following steps:
respectively melting polylactic acid-based polyurethane, PCDL-based polyurethane and PCL-based polyurethane according to the weight ratio to obtain polylactic acid-based polyurethane liquid, PCDL-based polyurethane liquid and PCL-based polyurethane liquid;
uniformly mixing polylactic acid-based polyurethane liquid, PCDL-based polyurethane liquid and PCL-based polyurethane liquid at the temperature of 180-190 ℃ to obtain mixed polyurethane liquid;
and naturally cooling the mixed polyurethane liquid to 20-25 ℃ to obtain the composite polyurethane elastomer.
By adopting the technical scheme, the raw materials are respectively melted firstly, and then the obtained liquid is mixed, so that the uniformity of the composite polyurethane elastomer is improved, and the composite polyurethane elastomer is mixed and naturally cooled at the temperature of 180-190 ℃, so that the elasticity of the obtained composite polyurethane elastomer is better.
In a specific possible embodiment, the elastic polyurethane fiber comprises the following components in parts by weight: 30-40 parts of polyurethane fiber, 3-5 parts of carbon nano tube and 20-30 parts of DMF solution, wherein the DMF solution is a solution of N, N-dimethylacetamide and ethanol with the volume ratio of 1 (0.78-0.92).
By adopting the technical scheme, the DMF solution is beneficial to grafting the carbon nano tube on the polyurethane fiber, and the flexibility of the elastic polyurethane fiber is enhanced, so that the flexibility of the prepared elastic non-woven fabric is improved, and the breakage of the elastic non-woven fabric in the stretching process is reduced.
In a specific possible embodiment, the elastic polyurethane fiber is prepared by the following steps:
dispersing the carbon nano tube and the polyurethane fiber in a DMF (dimethyl formamide) solution according to a ratio to obtain a dispersed mixed solution;
and (3) performing ultrasonic dispersion on the dispersion mixed solution, and then performing deionized water coagulation bath coagulation to obtain the elastic polyurethane fiber.
By adopting the technical scheme, the preparation method is simple to operate, and the elastic polyurethane fiber with high elasticity and flexibility can be conveniently prepared.
In a specific embodiment, the slip agent is one of erucamide or oleamide.
In a specific possible embodiment, the aqueous polyurethane immersion liquid comprises the following components in parts by weight: 90-100 parts of waterborne polyurethane, 0.1-1 part of a solidification regulator and 3-5 parts of a waterborne color paste.
By adopting the technical scheme and adopting the water-based raw materials, the toxicity of the water-based polyurethane immersion liquid is reduced, so that the irritation of the elastic non-woven fabric to the skin is reduced, and the elastic non-woven fabric is healthier and safer.
In a second aspect, the application provides a medical application adhesive tape using the elastic non-woven fabric, which adopts the following technical scheme:
the medical application adhesive tape comprises an ointment attachment layer and a non-woven fabric pasting layer, wherein the ointment attachment layer is pasted on the non-woven fabric pasting layer, and the non-woven fabric pasting layer is made of the elastic non-woven fabric.
Through adopting above-mentioned technical scheme, adopt above-mentioned elasticity non-woven fabrics to prepare non-woven fabrics and paste layer and medical application sticky tape, help improving the elasticity of medical application sticky tape, reduce medical application sticky tape and drop when pasting.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the elastic non-woven fabric has excellent elasticity at 35-45 ℃ and is not easy to break, and the medical application adhesive tape prepared from the elastic non-woven fabric has high elasticity and is not easy to fall off after being pasted;
2. the nano inorganic filler is preferably selected, and the elastic change of the prepared elastic non-woven fabric is small after the elastic non-woven fabric is used for a long time at the temperature of 35-45 ℃;
3. the medical application adhesive tape is excellent in elasticity and is healthy and safe.
Detailed Description
The present application will be described in further detail with reference to examples. The polylactic acid polyol is PLAT220, Mn =2000, the polycarbonate diol is PCDL1000, and the polycaprolactone polyol is PCL 1000; the type of the coagulation regulator is SY-10# -2.
Preparation example of polylactic acid-based polyurethane
Preparation example 1
The preparation example provides polylactic acid-based polyurethane, which is prepared according to the following steps: 10kg of polylactic acid polyol is dehydrated for 2h under vacuum at 100 ℃, and then the polylactic acid polyol is added into 6kg of 1, 6-hexamethylene diisocyanate at 80 ℃ and reacted for 2.6h at 90 ℃ to obtain prepolymer.
And then 0.5kg of 1, 4-butanediol is dehydrated for 2h under vacuum at the temperature of 90 ℃, then the prepolymer and the 1, 4-butanediol are mixed and stirred evenly at the temperature of 125 ℃, then the mixture is poured into a mould, a test piece is pressed on a flat vulcanizing machine, and the pressure vulcanization, the demoulding and the curing in an oven at the temperature of 120 ℃ are carried out for 16h, thus obtaining the polylactic acid based polyurethane.
Preparation of the base polyurethane
Preparation example 2
This preparation example provides a PCDL-based polyurethane, and differs from preparation example 1 in that the polylactic acid polyol is replaced with an equal amount of polycarbonate diol.
Preparation of the base polyurethane
Preparation example 3
This preparation example provided PCL-based polyurethane, and the difference between this preparation example and preparation example 1 was that the same amount of polycaprolactone polyol was used instead of polylactic acid polyol.
Preparation example of Complex polyurethane elastomer
Preparation example 4
The preparation example provides a composite polyurethane elastomer, which comprises 1kg of polylactic acid-based polyurethane, 0.95kg of PCDL-based polyurethane and 0.4kg of PCL-based polyurethane. The polylactic acid-based polyurethane was the polylactic acid-based polyurethane prepared in preparation example 1, the PCDL-based polyurethane was the PCDL-based polyurethane prepared in preparation example 2, and the PCL-based polyurethane was the PCL-based polyurethane prepared in preparation example 3.
The preparation method comprises the following steps:
respectively melting polylactic acid-based polyurethane, PCDL-based polyurethane and PCL-based polyurethane at 190 ℃ according to the proportion to obtain polylactic acid-based polyurethane liquid, PCDL-based polyurethane liquid and PCL-based polyurethane liquid;
Mixing the polylactic acid-based polyurethane liquid, the PCDL-based polyurethane liquid and the PCL-based polyurethane liquid at 185 ℃, and uniformly stirring to obtain a mixed polyurethane liquid;
and naturally cooling the mixed polyurethane liquid to 25 ℃ to obtain the composite polyurethane elastomer.
Preparation example 5
This preparation example provided a syntactic polyurethane elastomer, and differs from preparation example 4 in that the PCDL-based polyurethane was used in an amount of 0.72 kg.
Preparation example 6
This preparation example provided a syntactic polyurethane elastomer, and differs from preparation example 4 in that the PCDL-based polyurethane was used in an amount of 1.26 kg.
Preparation example 7
This preparation example provided a syntactic polyurethane elastomer, and differs from preparation example 4 in that the amount of PCL-based polyurethane used was 0.25 kg.
Preparation example 8
This preparation example provided a composite polyurethane elastomer, and was different from preparation example 4 in that the amount of PCL-based polyurethane used was 0.5 kg.
Preparation example 9
The preparation example provides a composite polyurethane elastomer, and the difference between the preparation example and the preparation example 4 is that 0.01kg of nano calcium carbonate is added into mixed polyurethane liquid, and the mixed polyurethane liquid is stirred uniformly and then naturally cooled.
Preparation example 10
The preparation example provides a composite polyurethane elastomer, and the difference between the preparation example and the preparation example 4 is that 0.005kg of nano calcium carbonate is added into mixed polyurethane liquid, and the mixed polyurethane liquid is stirred uniformly and then naturally cooled.
Preparation example 11
The preparation example provides a composite polyurethane elastomer, and the difference between the preparation example and the preparation example 4 is that 0.02kg of nano calcium carbonate is added into mixed polyurethane liquid, and the mixed polyurethane liquid is stirred uniformly and then naturally cooled.
Preparation example of elastic polyurethane fiber
Preparation example 12
The preparation example provides an elastic polyurethane fiber, which comprises 35kg of polyurethane fiber, 4kg of carbon nano tubes and 25kg of DMF solution. The DMF solution is a solution of N, N-dimethylacetamide and ethanol in a volume ratio of 1: 0.85.
The elastic polyurethane fiber is prepared by the following steps:
adding the carbon nano tube and the polyurethane fiber into a DMF solution according to the proportion, and uniformly stirring to obtain a dispersed mixed solution;
and carrying out ultrasonic dispersion on the dispersion mixed solution under the power of 100W, and then carrying out deionized water coagulation bath solidification to obtain the elastic polyurethane fiber.
Preparation example 13
The preparation example provides an elastic polyurethane fiber, and the difference between the preparation example and the preparation example 12 is that the raw materials are in the following ratio: 30kg of polyurethane fiber, 3kg of carbon nano tube and 20kg of DMF solution.
Preparation example 14
The preparation example provides an elastic polyurethane fiber, and the difference between the preparation example and the preparation example 12 is that the raw materials are in the following ratio: 40kg of polyurethane fiber, 5kg of carbon nano tube and 30kg of DMF solution.
Preparation example 15
The present preparation example provides an elastic polyurethane fiber, and the difference between the preparation example and the preparation example 12 is that a DMF solution is a solution of N, N-dimethylacetamide and ethanol at a volume ratio of 1: 0.78.
Preparation example 16
The present preparation example provides an elastic polyurethane fiber, and the difference between the preparation example and the preparation example 12 is that a DMF solution is a solution of N, N-dimethylacetamide and ethanol at a volume ratio of 1: 0.92.
Preparation example of aqueous polyurethane impregnation solution
Preparation example 17
The preparation example provides an aqueous polyurethane immersion liquid, which comprises 95kg of aqueous polyurethane, 0.5kg of solidification regulator and 4kg of aqueous color paste.
The preparation method comprises the following steps: and adding the aqueous color paste into the aqueous polyurethane, uniformly stirring, adding the solidification regulator, and uniformly stirring to obtain the aqueous polyurethane impregnation liquid.
Examples
Example 1
This example provides an elastic nonwoven fabric, which is produced by impregnating a polyurethane-based nonwoven fabric with an aqueous polyurethane impregnation solution. The polyurethane-based non-woven fabric comprises 65kg of elastic polyurethane fibers, 32kg of composite polyurethane elastomer and 3kg of slipping agent. The elastic polyurethane fiber was the elastic polyurethane fiber prepared in preparation example 12, and the composite polyurethane elastomer was the composite polyurethane elastomer prepared in preparation example 4. The slipping agent is erucamide.
The elastic non-woven fabric is prepared according to the following steps:
polymerizing the elastic polyurethane fiber, the composite polyurethane elastomer and the slipping agent at 130 ℃, and spinning the mixture into the sea-island fiber in a composite spinning machine. The temperature of each part of the composite spinning machine is the temperature of a TPU screw: 40 ℃ in the feeding section, 100 ℃ in other sections and 230 ℃, and the temperature of the (WSCPU) screw: the feeding section is 40 ℃, the other sections are 100 ℃ to 235 ℃, and the temperature of the spinning assembly is 235 ℃.
The sea-island fiber is made into needle-punched non-woven fabric, and is ironed and shaped to the density of 0.28g/cm 3.
The needle-punched nonwoven fabric was immersed in the aqueous polyurethane-containing solution prepared in preparation example 17, the immersed nonwoven fabric was dried and solidified at 100 ℃, and the dried nonwoven fabric was then placed in a 5% NaOH aqueous solution and reduced at 40 ℃ for 45 minutes to obtain a base fabric.
And (3) washing the base fabric to be neutral by using water, and drying at 100 ℃ to obtain the elastic non-woven fabric.
Example 2
The present embodiment provides an elastic nonwoven fabric, and the difference between the present embodiment and embodiment 1 is that the raw material ratio of the polyurethane-based nonwoven fabric is as follows: 60kg of elastic polyurethane fiber, 25kg of composite polyurethane elastomer and 1kg of slipping agent.
Example 3
The present embodiment provides an elastic nonwoven fabric, and the difference between the present embodiment and embodiment 1 is that the raw material ratio of the polyurethane-based nonwoven fabric is as follows: 70kg of elastic polyurethane fiber, 38kg of composite polyurethane elastomer and 5kg of slipping agent.
Example 4
This example provides an elastic nonwoven fabric, and differs from example 1 in that the syntactic polyurethane elastomer is the syntactic polyurethane elastomer prepared in preparation example 5.
Example 5
This example provides an elastic nonwoven fabric, and differs from example 1 in that the syntactic polyurethane elastomer is the syntactic polyurethane elastomer prepared in preparation example 6.
Example 6
This example provides an elastic nonwoven fabric, and differs from example 1 in that the syntactic polyurethane elastomer is the syntactic polyurethane elastomer prepared in preparation example 7.
Example 7
This example provides an elastic nonwoven fabric, and differs from example 1 in that the syntactic polyurethane elastomer is the syntactic polyurethane elastomer prepared in preparation example 8.
Example 8
This example provides an elastic nonwoven fabric, and differs from example 1 in that the syntactic polyurethane elastomer is the syntactic polyurethane elastomer prepared in preparation example 9.
Example 9
This example provides an elastic nonwoven fabric, and differs from example 1 in that the syntactic polyurethane elastomer is the syntactic polyurethane elastomer prepared in preparation example 10.
Example 10
This example provides an elastic nonwoven fabric, and differs from example 1 in that the syntactic polyurethane elastomer is the syntactic polyurethane elastomer prepared in preparation example 11.
Example 11
This example provides an elastic nonwoven fabric, and differs from example 1 in that the elastic polyurethane fiber is the elastic polyurethane fiber prepared in preparation example 13.
Example 12
This example provides an elastic nonwoven fabric, and differs from example 1 in that the elastic polyurethane fiber is the elastic polyurethane fiber prepared in preparation example 14.
Example 13
This example provides an elastic nonwoven fabric, and differs from example 1 in that the elastic polyurethane fiber is the elastic polyurethane fiber prepared in preparation example 15.
Example 14
This example provides an elastic nonwoven fabric, and differs from example 1 in that the elastic polyurethane fiber is the elastic polyurethane fiber prepared in preparation example 16.
Example 15
This example provides an elastic nonwoven fabric, and differs from example 1 in that the slipping agent is oleamide.
Application example
Application examples 1 to 15
Application examples 1 to 15 each provide a medical application tape comprising an ointment attachment layer and a nonwoven fabric adhesive layer, the ointment attachment layer is adhered to the nonwoven fabric adhesive layer, and the nonwoven fabric adhesive layers of application examples 1 to 15 are made of the elastic nonwoven fabrics of examples 1 to 15 in sequence.
Comparative example
Comparative example 1
This comparative example, which is different from example 1 in that the complex polyurethane elastomer was replaced with the same amount of polylactic acid-based polyurethane prepared in preparation example 1, provides an elastic nonwoven fabric.
Comparative example 2
This comparative example, which is different from example 1 in that the composite polyurethane elastomer was replaced with the same amount of PCDL-based polyurethane prepared in preparation example 2, provides an elastic nonwoven fabric.
Comparative example 3
The present comparative example, which is different from example 1 in that an equivalent amount of PCL-based polyurethane prepared in preparation example 3 was used instead of the syntactic polyurethane elastomer, provides an elastic nonwoven fabric.
Comparative example 4
The comparative example provides an elastic non-woven fabric, and is different from the example 1 in that the polyurethane-based non-woven fabric comprises the following raw materials in parts by weight: 70kg of elastic polyurethane fiber, 19kg of polylactic acid-based polyurethane, 19kg of PCDL-based polyurethane and 5kg of slipping agent.
Performance test
The nonwoven fabrics obtained in examples 1 to 15 and comparative examples 1 to 4 were subjected to a performance test in accordance with GB/T24218 "test method for nonwoven fabrics for textiles", the test results being shown in Table 1.
The medical application adhesive tape of application examples 1-15 is pasted on the skin of a human body, and after the medical application adhesive tape is pasted for 24 hours, the medical application adhesive tape does not fall off.
TABLE 1
Combining example 1 and comparative examples 1-4 and table 1, it can be seen that the tensile strength and elongation at break of example 1 and comparative examples 2-4 are both greater than that of comparative example 1, the elastic recovery of comparative examples 2-4 is much less than that of comparative example 1, and the elastic recovery of example 1 is close to that of comparative example 1. This indicates that the composition of the polylactic acid-based polyurethane, the PCDL-based polyurethane and the PCL-based polyurethane contributes to improvement of elasticity, tensile strength and elongation at break of the elastic nonwoven fabric, so that the elastic nonwoven fabric is not easily broken and is not easily peeled off after application.
As can be seen from examples 1 to 15 in combination with table 1, when the weight ratio of the polylactic acid-based polyurethane, the PCDL-based polyurethane and the PCL-based polyurethane is controlled within the range of the present application and the elastic polyurethane fiber, the composite polyurethane elastomer and the aqueous polyurethane impregnation solution are prepared according to the preparation method of the present application, it is possible to prepare an elastic nonwoven fabric having excellent elasticity and being less likely to break.
Adopt the medical application sticky tape of the elasticity non-woven fabrics preparation of this application, have good elasticity, be difficult for droing when pasting.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. An elastic non-woven fabric, which is characterized in that: the polyurethane-based non-woven fabric is prepared by impregnating a water-based polyurethane impregnation solution with a polyurethane-based non-woven fabric, wherein the polyurethane-based non-woven fabric comprises the following components in parts by weight: 60-70 parts of elastic polyurethane fiber, 25-38 parts of composite polyurethane elastomer and 1-5 parts of slipping agent, wherein the composite polyurethane elastomer comprises polylactic acid-based polyurethane, PCDL-based polyurethane and PCL-based polyurethane, and the weight ratio of the polylactic acid-based polyurethane to the PCDL-based polyurethane is 1 (0.72-1.26) to 0.25-0.5.
2. The stretch nonwoven fabric of claim 1, wherein: the composite polyurethane elastomer also comprises a nano inorganic filler, and the weight ratio of the polylactic acid-based polyurethane to the nano inorganic filler is 1 (0.005-0.02).
3. A stretch nonwoven fabric according to claim 2, characterised in that: the nano inorganic filler comprises at least one of nano calcium carbonate, nano titanium dioxide and nano carbon black.
4. A stretch nonwoven fabric according to claim 1, characterised in that the syntactic polyurethane elastomer is prepared by the steps of:
respectively melting polylactic acid-based polyurethane, PCDL-based polyurethane and PCL-based polyurethane according to the weight ratio to obtain polylactic acid-based polyurethane liquid, PCDL-based polyurethane liquid and PCL-based polyurethane liquid;
Uniformly mixing polylactic acid-based polyurethane liquid, PCDL-based polyurethane liquid and PCL-based polyurethane liquid at the temperature of 180-190 ℃ to obtain mixed polyurethane liquid;
and naturally cooling the mixed polyurethane liquid to 20-25 ℃ to obtain the composite polyurethane elastomer.
5. The stretch nonwoven fabric of claim 1, wherein: the elastic polyurethane fiber comprises the following components in parts by weight: 30-40 parts of polyurethane fiber, 3-5 parts of carbon nano tube and 20-30 parts of DMF solution, wherein the DMF solution is a solution of N, N-dimethylacetamide and ethanol with the volume ratio of 1 (0.78-0.92).
6. An elastic nonwoven fabric according to claim 5, wherein the elastic polyurethane fiber is prepared by the following steps:
dispersing the carbon nano tube and the polyurethane fiber in a DMF solution according to the proportion to obtain a dispersed mixed solution;
and (3) carrying out ultrasonic dispersion on the dispersion mixed solution, and then carrying out deionized water coagulation bath coagulation to obtain the elastic polyurethane fiber.
7. A stretch nonwoven fabric according to claim 1, characterised in that: the slipping agent is one of erucamide or oleamide.
8. A stretch nonwoven fabric according to claim 1, characterised in that: the aqueous polyurethane immersion liquid comprises the following components in parts by weight: 90-100 parts of waterborne polyurethane, 0.1-1 part of a solidification regulator and 3-5 parts of a waterborne color paste.
9. A medical adhesive tape using the stretch nonwoven fabric according to any one of claims 1 to 8, characterized in that: the ointment adhesive layer is bonded on the non-woven fabric bonding layer, and the non-woven fabric bonding layer is made of the elastic non-woven fabric.
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