CN113046928B - High-toughness medical non-woven fabric - Google Patents
High-toughness medical non-woven fabric Download PDFInfo
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- CN113046928B CN113046928B CN202110278594.2A CN202110278594A CN113046928B CN 113046928 B CN113046928 B CN 113046928B CN 202110278594 A CN202110278594 A CN 202110278594A CN 113046928 B CN113046928 B CN 113046928B
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 83
- 239000000835 fiber Substances 0.000 claims abstract description 93
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 63
- 239000002131 composite material Substances 0.000 claims abstract description 49
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 38
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 37
- 239000004917 carbon fiber Substances 0.000 claims abstract description 37
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 29
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 24
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 22
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 22
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 19
- BFSVOASYOCHEOV-UHFFFAOYSA-N 2-diethylaminoethanol Chemical compound CCN(CC)CCO BFSVOASYOCHEOV-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000002844 melting Methods 0.000 claims abstract description 16
- 230000008018 melting Effects 0.000 claims abstract description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 13
- 229920005906 polyester polyol Polymers 0.000 claims abstract description 13
- 239000012948 isocyanate Substances 0.000 claims abstract description 12
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims abstract description 12
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 10
- 238000009987 spinning Methods 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims description 29
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000012792 core layer Substances 0.000 claims description 17
- 238000002791 soaking Methods 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 13
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- OMOVVBIIQSXZSZ-UHFFFAOYSA-N [6-(4-acetyloxy-5,9a-dimethyl-2,7-dioxo-4,5a,6,9-tetrahydro-3h-pyrano[3,4-b]oxepin-5-yl)-5-formyloxy-3-(furan-3-yl)-3a-methyl-7-methylidene-1a,2,3,4,5,6-hexahydroindeno[1,7a-b]oxiren-4-yl] 2-hydroxy-3-methylpentanoate Chemical compound CC12C(OC(=O)C(O)C(C)CC)C(OC=O)C(C3(C)C(CC(=O)OC4(C)COC(=O)CC43)OC(C)=O)C(=C)C32OC3CC1C=1C=COC=1 OMOVVBIIQSXZSZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 12
- 238000005406 washing Methods 0.000 claims description 12
- 239000004760 aramid Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 239000002994 raw material Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 11
- 239000002202 Polyethylene glycol Substances 0.000 description 4
- 241001122767 Theaceae Species 0.000 description 4
- 229920001223 polyethylene glycol Polymers 0.000 description 4
- 150000008442 polyphenolic compounds Chemical class 0.000 description 4
- 235000013824 polyphenols Nutrition 0.000 description 4
- 241000721662 Juniperus Species 0.000 description 3
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 3
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical group NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 2
- 229920001661 Chitosan Polymers 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910000365 copper sulfate Inorganic materials 0.000 description 2
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 description 1
- AXKZIDYFAMKWSA-UHFFFAOYSA-N 1,6-dioxacyclododecane-7,12-dione Chemical compound O=C1CCCCC(=O)OCCCCO1 AXKZIDYFAMKWSA-UHFFFAOYSA-N 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- ARIWANIATODDMH-UHFFFAOYSA-N Lauric acid monoglyceride Natural products CCCCCCCCCCCC(=O)OCC(O)CO ARIWANIATODDMH-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 241000381602 Vachellia nebrownii Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 230000003385 bacteriostatic effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
Classifications
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- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/002—Inorganic yarns or filaments
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
- D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
-
- 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
- D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
- D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
- D04H5/03—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling by fluid jet
-
- 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
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
- D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
-
- 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
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/144—Alcohols; Metal alcoholates
- D06M13/148—Polyalcohols, e.g. glycerol or glucose
-
- 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
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/322—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing nitrogen
- D06M13/368—Hydroxyalkylamines; Derivatives thereof, e.g. Kritchevsky bases
-
- 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
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/17—Natural resins, resinous alcohols, resinous acids, or derivatives thereof
-
- 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
- D06M15/572—Reaction products of isocyanates with polyesters or polyesteramides
-
- 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
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
-
- 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
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/34—Polyamides
- D06M2101/36—Aromatic polyamides
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Inorganic Chemistry (AREA)
- Microbiology (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Nonwoven Fabrics (AREA)
- Woven Fabrics (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Artificial Filaments (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The invention discloses a high-toughness medical non-woven fabric and a preparation method thereof, wherein the high-toughness medical non-woven fabric is prepared from the following raw materials, by weight, 49-57 parts of modified aramid fiber, 25-29 parts of polytetrafluoroethylene fiber, 21-25 parts of carbon fiber, 13-17 parts of light calcium carbonate, 4-9 parts of antibacterial liquid and 1-3 parts of antioxidant; wherein the modified aramid fiber is mainly prepared by the reaction of aramid fiber, polyester polyol, graphene oxide, ammonia water, diethylaminoethanol and isocyanate; blending and melting modified aramid fiber, polytetrafluoroethylene fiber, light calcium carbonate and antioxidant, and obtaining composite fiber through spinning holes; the composite fiber and the carbon fiber are stacked to form a fiber web, and the fiber web is reinforced by high-pressure water jet to prepare a non-woven fabric; the non-woven fabric is soaked by the antibacterial liquid to prepare the non-woven fabric with high toughness, high strength and good antibacterial property, and can be widely applied to the field of medical and health.
Description
Technical Field
The invention relates to the technical field of non-woven fabric production, in particular to a high-toughness medical non-woven fabric.
Background
Nonwoven fabrics, also known as nonwovens, are constructed from oriented or random fibers, which are referred to as cloths because of their appearance and certain properties. The non-woven fabric has no warps and wefts, is very convenient to cut and sew, is light in weight and easy to shape, and is deeply favored by handcraftsmen. The non-woven fabric product is widely used, attractive and elegant in appearance, various in patterns and styles, light in weight, environment-friendly and recyclable, and is internationally recognized as an environment-friendly product for protecting the ecology of the earth due to rich colors, vividness, fashion and environment friendliness. Is widely applied to the fields of chemical industry, automobile industry, home building materials, life decoration, medical treatment and health, etc.
Wherein the medical and sanitary non-woven fabric is mainly prepared from polyester, polyamide, polytetrafluoroethylene, polypropylene, carbon fiber and glass fiber; the non-woven fabric product comprises a disposable mask, protective clothing, operation clothing, isolation clothing and medical coating materials; however, the existing medical non-woven fabrics often have the problem of poor toughness and durability.
Disclosure of Invention
The invention aims to provide a high-toughness medical non-woven fabric and a preparation method thereof, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the medical high-toughness non-woven fabric is prepared from the following raw materials, by weight, 49-57 parts of modified aramid fiber, 25-29 parts of polytetrafluoroethylene fiber, 21-25 parts of carbon fiber, 13-17 parts of light calcium carbonate, 4-9 parts of antibacterial liquid and 1-3 parts of antioxidant.
The modified aramid fiber is mainly prepared by the reaction of aramid fiber, polyester polyol, graphene oxide, ammonia water, diethylaminoethanol and isocyanate, wherein the mass ratio of the polyester polyol to the isocyanate is 4:1. The polyester polyol is any one of polyethylene glycol adipate, polyethylene glycol co-glycol adipate, polyethylene glycol butylene adipate and polyethylene glycol adipate.
The antioxidant is prepared by mixing hindered phenols and phosphate antioxidants, and the mass ratio of the hindered phenols to the phosphate antioxidants is 1-3:1.
The antibacterial liquid is prepared from the following raw materials: the tea polyphenol comprises, by weight, 10 parts of tea polyphenol, 7 parts of juniper oil, 3 parts of chitosan, 3 parts of copper sulfate and 1.5 parts of lauric acid monoglyceride. The antibacterial liquid is prepared by dissolving tea polyphenols in distilled water, heating to 50deg.C, adding juniper oil, chitosan, copper sulfate, and monoglyceride of lauric acid, stirring, and vacuum-treating for 20 min.
A preparation method of high-toughness medical non-woven fabric comprises the following steps of; (1) preparing modified aramid fiber; taking polyester polyol, raising the temperature to 105-110 ℃, and vacuum dehydrating; cooling to 60 ℃, adding isocyanate and 1/2 mass of diethylaminoethanol, and heating to obtain a substance A;
melting the substance A, adding aramid fiber and the rest 1/2 mass of diethylaminoethanol, uniformly mixing, and reacting at 80-90 ℃ to obtain a substance B; dissolving graphene oxide in a phosphoric acid solution, adding a hydrogen peroxide solution, stirring, reacting, filtering, and washing with absolute ethyl alcohol; obtaining a substance C; dissolving the substance C in an acetone solution, adding ammonia water and the substance B, uniformly stirring, dropwise adding a sodium hydroxide solution, filtering, and washing to obtain modified aramid fibers;
(2) Preparation of high-toughness medical non-woven fabric
Mixing the modified aramid fiber, polytetrafluoroethylene fiber, light calcium carbonate and an antioxidant, melting, outputting through spinning holes, and drafting to form composite fibers; stacking and paving the composite fibers into a fiber net core layer, and paving the carbon fibers into a transverse and vertical grid shape to cover the surface of the fiber net core layer to form a composite fiber net; the composite fiber web is reinforced by a first high-pressure water jet, a second high-pressure water jet and a third high-pressure water jet to obtain a water jet non-woven fabric; soaking the spunlaced non-woven fabric in antibacterial liquid, and drying to obtain the high-toughness medical non-woven fabric.
The light calcium carbonate is a fibrous substance with good dispersibility and uniform size, has the advantages of reinforcing property, good heat insulation performance, easy dispersion and good compatibility with resin and fiber; the light calcium carbonate is used as reinforcing filling particles, and is mixed with the modified aramid fiber and the polytetrafluoroethylene fiber, so that the tensile strength and the mechanical property of the composite fiber can be enhanced.
Preferably, the preparation method of the high-toughness medical non-woven fabric comprises the following steps of (1) preparing modified aramid fiber; taking polyester polyol, raising the temperature to 105-110 ℃, and vacuum dehydrating for 30min; cooling to 60 ℃, adding isocyanate and 1/2 mass of diethylaminoethanol, heating to 80-90 ℃, and reacting for 2-3h to obtain a substance A;
melting the substance A, adding aramid fiber and the rest 1/2 mass of diethylaminoethanol, uniformly mixing, and reacting for 20-30min at 80-90 ℃ to obtain a substance B; dissolving graphene oxide in a phosphoric acid solution, adding a 35% hydrogen peroxide solution, stirring, reacting, filtering, and washing with absolute ethyl alcohol; obtaining a substance C; dissolving the substance C in an acetone solution, adding ammonia water and the substance B, uniformly stirring, dropwise adding a sodium hydroxide solution, reacting for 40-60min at 57-62 ℃, filtering, and washing to obtain modified aramid fibers;
the aramid fiber has excellent mechanical properties, high mechanical strength and high rigidity; however, the flexibility of the aramid fiber is poor, and in the technical scheme, the aramid fiber is modified by using polyester polyol, isocyanate and diethylaminoethanol through chemical reaction; the polyester polyol and isocyanate react to generate polyurethane resin with carbamate groups, and the molecular structure of the carbamate groups ensures that the resin has excellent elasticity; the urethane group grows and the rigidity of the molecular chain is enhanced under the action of diethylaminoethanol; the urethane groups and the amide groups in the molecules of the aramid fiber form hydrogen bonds, and the aramid fiber and the polyurethane resin are connected through chemical bonding, so that the excellent elasticity of polyurethane and the high rigidity of the aramid fiber can be combined, and the aramid fiber not only maintains high strength, but also has certain elasticity; therefore, the nonwoven fabric prepared by using the modified polypropylene can endow the nonwoven fabric with higher toughness.
Mixing ammonia water and graphene oxide, and opening ring of epoxy groups on the surface of the graphene oxide to be connected with amino groups at 57-60 ℃; and mixing the modified aramid fiber with the treated aramid fiber, and bonding and connecting amino groups with hydroxyl groups in fiber molecules under the catalysis of alkali to obtain the modified aramid fiber with the graphene oxide structure, wherein the modified aramid fiber is endowed with high toughness of the graphene oxide molecules.
(2) Preparing high-toughness medical non-woven fabrics; mixing the modified aramid fiber, polytetrafluoroethylene fiber, light calcium carbonate and an antioxidant, melting at 185-200 ℃, outputting through a spinning hole, and drafting to form a composite fiber; stacking and paving the composite fibers into a fiber net core layer, and covering carbon fibers on the surface of the fiber net core layer to form a composite fiber net; 7 times of hydroentanglement reinforcement are carried out on the composite fiber web to obtain a hydroentangled non-woven fabric; soaking the spunlaced nonwoven fabric in antibacterial solution at a bath ratio of 1:105-6h, drying to obtain high-toughness medical non-woven fabric; high-toughness medical non-woven fabric with gram weight of 80-100g/m 2 . Wherein the medium carbon fibers are paved into a transverse and vertical alternative grid shape, and the mass of the carbon fibers is 10% of that of the composite fibers; the first water jet pressure is 2-4mpa, the second water jet pressure is 6-8mpa, the third water jet pressure is 7.5-10 mpa, the fourth water jet pressure is 7-9mpa, the fifth water jet pressure is 7-9mpa, the sixth water jet pressure is 5-7mpa, and the seventh water jet pressure is 5-7mpa.
The carbon fiber is high-strength high-modulus fiber with carbon content of more than 90%, the carbon fiber is paved into transverse and vertical grids to cover the surface of the composite fiber net core layer, the non-woven fabric is formed after being reinforced by water thorn, the carbon fiber forms a transverse and vertical interweaved net-shaped protective layer, the longitudinal and transverse stretching deformation of the non-woven fabric can be reduced, and the impact toughness of the non-woven fabric is enhanced.
The juniper oil and tea polyphenol in the antibacterial liquid are natural and efficient antibacterial substances, and the non-woven fabric is treated by the antibacterial substances, so that the non-woven fabric has long-acting antibacterial performance, and the medical requirement on antibacterial performance is met.
Compared with the prior art, the invention has the beneficial effects that:
the invention utilizes polyester polyol, graphene oxide, ammonia water, diethylaminoethanol and isocyanate to modify high-strength aramid fiber through reaction, so that the high-strength aramid fiber is kept high in strength and rigidity and has certain elasticity, the modified aramid fiber and polytetrafluoroethylene fiber are blended into composite fiber, the composite fiber is stacked into a composite fiber net, the surface of the composite fiber net is covered with carbon fiber with a grid structure, the carbon fiber is reinforced by high-pressure water jet to prepare high-toughness non-woven fabric, and the high-toughness non-woven fabric is soaked by antibacterial liquid, so that the high-strength non-woven fabric has antibacterial and bacteriostatic properties and can be widely applied to the medical and health industry.
The specific embodiment is as follows:
the following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A high-toughness medical non-woven fabric is prepared from the following raw materials, by weight, 49 parts of modified aramid fibers, 25 parts of polytetrafluoroethylene fibers, 21 parts of carbon fibers, 13 parts of light calcium carbonate, 4 parts of antibacterial liquid and 1 part of antioxidants.
A preparation method of high-toughness medical non-woven fabric comprises the following steps of; (1) preparing modified aramid fiber; taking polyester polyol, raising the temperature to 105 ℃, and vacuum dehydrating for 30min; cooling to 60 ℃, adding isocyanate and 1/2 mass of diethylaminoethanol, heating to 80 ℃, and reacting for 2 hours to obtain a substance A;
melting the substance A, adding aramid fiber and the rest 1/2 mass of diethylaminoethanol, uniformly mixing, and reacting for 20min at 80 ℃ to obtain a substance B; dissolving graphene oxide in a phosphoric acid solution, adding a 35% hydrogen peroxide solution, stirring, reacting, filtering, and washing with absolute ethyl alcohol; obtaining a substance C; dissolving a substance C in an acetone solution, adding ammonia water and a substance B, uniformly stirring, dropwise adding a sodium hydroxide solution, reacting for 40min at 57 ℃, filtering, and washing to obtain a modified aramid fiber;
(2) Preparing high-toughness medical non-woven fabrics; mixing the modified aramid fiber, polytetrafluoroethylene fiber, light calcium carbonate and an antioxidant, melting at 185 ℃, outputting through a spinning hole, and drafting to form a composite fiber; stacking and paving the composite fibers into a fiber net core layer, and covering carbon fibers on the surface of the fiber net core layer to form a composite fiber net; 7 times of hydroentanglement reinforcement are carried out on the composite fiber web to obtain a hydroentangled non-woven fabric; adding the spunlaced non-woven fabric into the antibacterial liquid for soaking, wherein the bath ratio is 1:10, soaking for 5 hours, and drying to obtain the high-toughness medical non-woven fabric. The carbon fibers are laid into a transverse and vertical alternate grid shape, and the mass of the carbon fibers is 10% of that of the composite fibers. In the hydroentangling process, the first hydroentangling pressure is 2mpa, the second hydroentangling pressure is 6mpa, the third hydroentangling pressure is 7.5mpa, the fourth hydroentangling pressure is 7mpa, the fifth hydroentangling pressure is 7mpa, the sixth hydroentangling pressure is 5mpa, and the seventh hydroentangling pressure is 5mpa.
Example 2
The high-toughness medical non-woven fabric is prepared from the following raw materials, by weight, 51 parts of modified aramid fiber, 27 parts of polytetrafluoroethylene fiber, 22 parts of carbon fiber, 15 parts of light calcium carbonate, 5 parts of antibacterial liquid and 2 parts of antioxidant.
A preparation method of high-toughness medical non-woven fabric comprises the following steps of; (1) preparing modified aramid fiber; taking polyester polyol, raising the temperature to 107 ℃, and vacuum dehydrating for 30min; cooling to 60 ℃, adding isocyanate and 1/2 mass of diethylaminoethanol, heating to 83 ℃, and reacting for 2.5h to obtain a substance A;
melting the substance A, adding aramid fiber and the rest 1/2 mass of diethylaminoethanol, uniformly mixing, and reacting for 25min at 83 ℃ to obtain a substance B; dissolving graphene oxide in a phosphoric acid solution, adding a 35% hydrogen peroxide solution, stirring, reacting, filtering, and washing with absolute ethyl alcohol; obtaining a substance C; dissolving a substance C in an acetone solution, adding ammonia water and a substance B, uniformly stirring, dropwise adding a sodium hydroxide solution, reacting for 50min at 60 ℃, filtering, and washing to obtain a modified aramid fiber;
(2) Preparing high-toughness medical non-woven fabrics; mixing the modified aramid fiber, polytetrafluoroethylene fiber, light calcium carbonate and an antioxidant, melting at 190 ℃, outputting through a spinning hole, and drafting to form a composite fiber; stacking and paving the composite fibers into a fiber net core layer, and covering carbon fibers on the surface of the fiber net core layer to form a composite fiber net; 7 times of hydroentanglement reinforcement are carried out on the composite fiber web to obtain a hydroentangled non-woven fabric; adding the spun-laced non-woven fabric into the antibacterial liquid for soaking, wherein the bath ratio is 1:10, soaking for 5.5 hours, and drying to obtain the high-toughness medical non-woven fabric. The carbon fibers are laid into a transverse and vertical alternate grid shape, and the mass of the carbon fibers is 10% of that of the composite fibers. In the hydroentangling process, the first hydroentangling pressure is 3mpa, the second hydroentangling pressure is 7mpa, the third hydroentangling pressure is 9mpa, the fourth hydroentangling pressure is 8mpa, the fifth hydroentangling pressure is 8mpa, the sixth hydroentangling pressure is 6mpa, and the seventh hydroentangling pressure is 6mpa.
Example 3
The high-toughness medical non-woven fabric is prepared from 57 parts by weight of modified aramid fiber, 29 parts by weight of polytetrafluoroethylene fiber, 25 parts by weight of carbon fiber, 17 parts by weight of light calcium carbonate, 9 parts by weight of antibacterial liquid and 3 parts by weight of antioxidant.
A preparation method of high-toughness medical non-woven fabric comprises the following steps of; (1) preparing modified aramid fiber; taking polyester polyol, raising the temperature to 110 ℃, and vacuum dehydrating for 30min; cooling to 60 ℃, adding isocyanate and 1/2 mass of diethylaminoethanol, heating to 90 ℃, and reacting for 3 hours to obtain a substance A;
melting the substance A, adding aramid fiber and the rest 1/2 mass of diethylaminoethanol, uniformly mixing, and reacting for 30min at 90 ℃ to obtain a substance B; dissolving graphene oxide in a phosphoric acid solution, adding a 35% hydrogen peroxide solution, stirring, reacting, filtering, and washing with absolute ethyl alcohol; obtaining a substance C; dissolving a substance C in an acetone solution, adding ammonia water and a substance B, uniformly stirring, dropwise adding a sodium hydroxide solution, reacting for 60min at the temperature of 62 ℃, filtering, and washing to obtain modified aramid fibers;
(2) Preparing high-toughness medical non-woven fabrics; mixing the modified aramid fiber, polytetrafluoroethylene fiber, light calcium carbonate and an antioxidant, melting at 200 ℃, outputting through a spinning hole, and drafting to form a composite fiber; stacking and paving the composite fibers into a fiber net core layer, and covering carbon fibers on the surface of the fiber net core layer to form a composite fiber net; 7 times of hydroentanglement reinforcement are carried out on the composite fiber web to obtain a hydroentangled non-woven fabric; adding the spunlaced non-woven fabric into the antibacterial liquid for soaking, wherein the bath ratio is 1:10, soaking for 6 hours, and drying to obtain the high-toughness medical non-woven fabric. The carbon fibers are laid into a transverse and vertical alternate grid shape, and the mass of the carbon fibers is 10% of that of the composite fibers. In the hydroentangling process, the first hydroentangling pressure is 4mpa, the second hydroentangling pressure is 8mpa, the third hydroentangling pressure is 10 mpa, the fourth hydroentangling pressure is 9mpa, the fifth hydroentangling pressure is 9mpa, the sixth hydroentangling pressure is 7mpa, and the seventh hydroentangling pressure is 7mpa.
Comparative example 1
The high-toughness medical non-woven fabric is prepared from 57 parts by weight of aramid fiber, 29 parts by weight of polytetrafluoroethylene fiber, 25 parts by weight of carbon fiber, 17 parts by weight of light calcium carbonate, 9 parts by weight of antibacterial liquid and 3 parts by weight of antioxidant.
A preparation method of high-toughness medical non-woven fabric comprises the following steps of;
mixing aramid fiber, polytetrafluoroethylene fiber, light calcium carbonate and an antioxidant, melting at 200 ℃, outputting through spinning holes, and drafting to form composite fiber; stacking and paving the composite fibers into a fiber net core layer, and covering carbon fibers on the surface of the fiber net core layer to form a composite fiber net; 7 times of hydroentanglement reinforcement are carried out on the composite fiber web to obtain a hydroentangled non-woven fabric; adding the spunlaced non-woven fabric into the antibacterial liquid for soaking, wherein the bath ratio is 1:10, soaking for 6 hours, and drying to obtain the high-toughness medical non-woven fabric. The carbon fibers are laid into a transverse and vertical alternate grid shape, and the mass of the carbon fibers is 10% of that of the composite fibers. In the hydroentangling process, the first hydroentangling pressure is 4mpa, the second hydroentangling pressure is 8mpa, the third hydroentangling pressure is 10 mpa, the fourth hydroentangling pressure is 9mpa, the fifth hydroentangling pressure is 9mpa, the sixth hydroentangling pressure is 7mpa, and the seventh hydroentangling pressure is 7mpa.
Comparative example 2
The high-toughness medical non-woven fabric is prepared from 57 parts by weight of aramid fiber, 29 parts by weight of polytetrafluoroethylene fiber, 25 parts by weight of carbon fiber, 9 parts by weight of antibacterial liquid and 3 parts by weight of antioxidant.
A preparation method of high-toughness medical non-woven fabric comprises the following steps of; mixing aramid fiber, polytetrafluoroethylene fiber and antioxidant, melting at 200 ℃, outputting through spinning holes, and drafting to form composite fiber; stacking and paving the composite fibers into a fiber net core layer, and covering carbon fibers on the surface of the fiber net core layer to form a composite fiber net; 7 times of hydroentanglement reinforcement are carried out on the composite fiber web to obtain a hydroentangled non-woven fabric; adding the spunlaced non-woven fabric into the antibacterial liquid for soaking, wherein the bath ratio is 1:10, soaking for 6 hours, and drying to obtain the high-toughness medical non-woven fabric. The carbon fibers are laid into a transverse and vertical alternate grid shape, and the mass of the carbon fibers is 10% of that of the composite fibers. In the hydroentangling process, the first hydroentangling pressure is 4mpa, the second hydroentangling pressure is 8mpa, the third hydroentangling pressure is 10 mpa, the fourth hydroentangling pressure is 9mpa, the fifth hydroentangling pressure is 9mpa, the sixth hydroentangling pressure is 7mpa, and the seventh hydroentangling pressure is 7mpa.
Comparative example 3
The high-toughness medical non-woven fabric is prepared from 57 parts by weight of aramid fiber, 29 parts by weight of polytetrafluoroethylene fiber, 9 parts by weight of antibacterial solution and 3 parts by weight of antioxidant.
A preparation method of high-toughness medical non-woven fabric comprises the following steps of; mixing aramid fiber, polytetrafluoroethylene fiber and antioxidant, melting at 200 ℃, outputting through spinning holes, and drafting to form composite fiber; stacking the composite fibers into a web; 7 times of hydroentanglement reinforcement are carried out on the fiber web to obtain a hydroentangled non-woven fabric; adding the spunlaced non-woven fabric into the antibacterial liquid for soaking, wherein the bath ratio is 1:10, soaking for 6 hours, and drying to obtain the high-toughness medical non-woven fabric. In the hydroentangling process, the first hydroentangling pressure is 4mpa, the second hydroentangling pressure is 8mpa, the third hydroentangling pressure is 10 mpa, the fourth hydroentangling pressure is 9mpa, the fifth hydroentangling pressure is 9mpa, the sixth hydroentangling pressure is 7mpa, and the seventh hydroentangling pressure is 7mpa.
Test comparison and analysis
In order to more intuitively prove the beneficial effects of the technical scheme, the technical scheme of the invention is compared with the prior art scheme for experiments; examples 1-3 are the technical scheme of the invention;
in comparative example 1, aramid fiber was used instead of modified aramid fiber, the remainder being the same as in example 3;
comparative example 2 was free of light calcium carbonate, and the remainder of the procedure was the same as in example 3 using aramid fibers instead of modified aramid fibers;
comparative example 3 was free of light calcium carbonate, free of carbon fiber mesh coverage, and the remainder of the procedure was the same as in example 3 using aramid fibers instead of modified aramid fibers;
the non-woven fabrics prepared in examples 1-3 and comparative examples 1-3 were subjected to mechanical property detection, and the detection data are shown in Table 1;
| project | Strong N/5cm transverse rupture | Strong N/5cm in longitudinal fracture | Impact toughness J/cm2 |
| Example 1 | 124 | 95 | 75 |
| Example 2 | 123 | 96 | 75 |
| Example 3 | 125 | 100 | 77 |
| Comparative example 1 | 90 | 79 | 51 |
| Comparative example 2 | 60 | 45 | 43 |
| Comparative example 3 | 44 | 36 | 40 |
TABLE 1
As can be seen from Table 1, the nonwoven fabrics prepared in examples 1-3 had higher transverse and longitudinal breaking strengths than comparative examples 1-3; the nonwoven fabrics prepared in examples 1-3 have high strength and high impact toughness values; the nonwoven fabrics prepared in examples 1-3 are shown to have higher toughness, i.e., the nonwoven fabrics prepared by the technical scheme of the invention have higher toughness.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (1)
1. A high-toughness medical non-woven fabric, which is characterized in that: the modified aramid fiber comprises, by weight, 57 parts of modified aramid fiber, 29 parts of polytetrafluoroethylene fiber, 25 parts of carbon fiber, 17 parts of light calcium carbonate, 9 parts of antibacterial solution and 3 parts of antioxidant;
the preparation method of the high-toughness medical non-woven fabric comprises the following steps of; (1) preparing modified aramid fiber; taking polyester polyol, raising the temperature to 110 ℃, and vacuum dehydrating for 30min; cooling to 60 ℃, adding isocyanate and 1/2 mass of diethylaminoethanol, heating to 90 ℃, and reacting for 3 hours to obtain a substance A;
melting the substance A, adding aramid fiber and the rest 1/2 mass of diethylaminoethanol, uniformly mixing, and reacting for 30min at 90 ℃ to obtain a substance B; dissolving graphene oxide in a phosphoric acid solution, adding a 35% hydrogen peroxide solution, stirring, reacting, filtering, and washing with absolute ethyl alcohol; obtaining a substance C; dissolving a substance C in an acetone solution, adding ammonia water and a substance B, uniformly stirring, dropwise adding a sodium hydroxide solution, reacting for 60min at the temperature of 62 ℃, filtering, and washing to obtain modified aramid fibers;
(2) Preparing high-toughness medical non-woven fabrics; mixing the modified aramid fiber, polytetrafluoroethylene fiber, light calcium carbonate and an antioxidant, melting at 200 ℃, outputting through a spinning hole, and drafting to form a composite fiber; stacking and paving the composite fibers into a fiber net core layer, and covering carbon fibers on the surface of the fiber net core layer to form a composite fiber net; 7 times of hydroentanglement reinforcement are carried out on the composite fiber web to obtain a hydroentangled non-woven fabric; adding the spunlaced non-woven fabric into antibacterial liquid for soaking, wherein the bath ratio is 1:10, soaking for 6 hours, and drying to obtain high-toughness medical non-woven fabric;
the carbon fibers are paved into a transverse and vertical alternative grid shape, and the mass of the carbon fibers is 10% of that of the composite fibers; in the hydroentangling process, the first hydroentangling pressure is 4mpa, the second hydroentangling pressure is 8mpa, the third hydroentangling pressure is 10 mpa, the fourth hydroentangling pressure is 9mpa, the fifth hydroentangling pressure is 9mpa, the sixth hydroentangling pressure is 7mpa, and the seventh hydroentangling pressure is 7mpa.
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| CN113699689B (en) * | 2021-09-06 | 2022-11-25 | 江阴市宏勇医疗科技发展有限公司 | Medical non-woven fabrics of high tension |
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| CN116531181B (en) * | 2023-05-09 | 2024-02-20 | 东莞苏氏卫生用品有限公司 | Five-layer laminated structure composite fiber core body and manufacturing method thereof |
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