CN117569006B - TPU non-woven fabric production process - Google Patents
TPU non-woven fabric production processInfo
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- CN117569006B CN117569006B CN202311758125.6A CN202311758125A CN117569006B CN 117569006 B CN117569006 B CN 117569006B CN 202311758125 A CN202311758125 A CN 202311758125A CN 117569006 B CN117569006 B CN 117569006B
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- nonwoven fabric
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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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
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- 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
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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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43838—Ultrafine fibres, e.g. microfibres
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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
- 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
- D04H1/492—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 by fluid jet
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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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
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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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
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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
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
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- 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
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
- D06M10/025—Corona discharge or low temperature plasma
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nonwoven Fabrics (AREA)
Abstract
本发明涉及非织布技术领域，具体涉及一种TPU非织布生产工艺，步骤：以耐溶剂TPU颗粒与环氧树脂颗粒共混熔融为纺丝液，采用熔喷法在成网机上铺网后无张力浸泡丙酮以溶解除去环氧树脂，再热风固结、收卷得到熔喷里层；熔喷里层退卷、等离子处理后进入成网机，以聚醚型TPU颗粒为皮料、聚酯型TPU颗粒为芯料进行复合纺丝，在成网机处的熔喷里层表面收集得到熔喷面层；以胶原蛋白液为水刺介质处理面层和里层，最后热风烘燥、切边收卷。本发明提高熔喷里层的抗菌亲肤性能，有助于提升面层与里层固结力，本发明非织布可应用于医疗/看护等健康相关目的、主要为一次性的物品，例如纸尿布、生理用卫生棉、纱布、绷带、口罩、手套、创口贴等。The present invention relates to the technical field of nonwoven fabrics, and specifically to a TPU nonwoven fabric production process, comprising the following steps: using solvent-resistant TPU particles and epoxy resin particles to melt and blend to form a spinning solution; using a melt-blowing method to spread a web on a web-forming machine, then soaking it in acetone without tension to dissolve and remove the epoxy resin; then hot-air consolidating and winding it to obtain a melt-blown inner layer; unwinding the melt-blown inner layer, subjecting it to plasma treatment, and then entering a web-forming machine for composite spinning using polyether TPU particles as the skin material and polyester TPU particles as the core material; collecting the melt-blown inner layer on the surface of the web-forming machine to obtain a melt-blown surface layer; treating the surface layer and the inner layer with collagen solution as a hydroentanglement medium; and finally hot-air drying, trimming, and winding it. The present invention improves the antibacterial and skin-friendly properties of the melt-blown inner layer and helps to enhance the bonding strength between the surface layer and the inner layer. The nonwoven fabric of the present invention can be used for health-related purposes such as medical care/nursing, mainly disposable items, such as diapers, sanitary napkins, gauze, bandages, masks, gloves, and wound dressings.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to a TPU non-woven fabric production process.
Background
Thermoplastic polyurethane non-woven fabric (TPU non-woven fabric) is a nontoxic and harmless environment-friendly material, and is formed by mutually combining sheets, fiber webs or batting which are formed by rubbing, cohesion or adhesion of oriented or random fibers or the combination of the methods, has the advantages of good elasticity, light weight, high moisture permeability and water resistance, does not cause any harm to human skin, and is widely applied to the fields of clothing fabrics, medical sanitation, leather and the like.
Chinese publication (CN 1445390A) discloses a method for manufacturing polyurethane elastic nonwoven fabrics by melt-blowing, which comprises the steps of feeding polyurethane particles into a screw extruder, heating and melting at 180-260 ℃, extruding from the spinneret holes of a die head, blowing hot air streams at two sides of the spinneret holes, stretching the melt to form superfine fibers, and self-bonding to form the polyurethane elastic nonwoven fabrics. However, TPU particles themselves do not have antimicrobial properties and cannot meet the antimicrobial requirements of medical supplies such as wound dressings for nonwoven fabrics. In addition, for the composite non-woven fabric product, the adhesion between the interlaminar fibers mainly depends on self-adhesion, the peeling strength is helpful to be improved, and the related technical route for simultaneously solving the technical problems of antibacterial and peeling strength improvement does not appear in the prior art.
Disclosure of Invention
The invention aims to provide a TPU non-woven fabric production process which meets the technical requirements of improving antibacterial performance and peeling strength.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
The TPU non-woven fabric production process specifically comprises the following steps:
S1, blending and melting solvent-resistant TPU particles and epoxy resin particles to obtain spinning solution, and performing tension-free soaking of an acetone organic solvent to dissolve and remove epoxy resin after lapping on a lapping machine by adopting a melt blowing method, and performing hot air drying, consolidation bonding and rolling to obtain a melt blowing inner layer;
S2, unwinding the melt-blown lining layer, performing plasma treatment, and then feeding the melt-blown lining layer into a web forming machine, performing composite spinning by taking polyether type TPU particles as leather materials and polyester type TPU particles as core materials, and collecting the melt-blown lining layer surface at the web forming machine to obtain a melt-blown surface layer;
And S3, treating the melt-blown surface layer and the melt-blown inner layer overlapped in the step S2 by taking the collagen liquid as a water jet medium, and finally drying by hot air, trimming and rolling.
Preferably, the mass ratio of the solvent resistant TPU particles to the epoxy resin particles in step S1 is 1-3:1.
Preferably, the solvent resistant TPU particles employ Basoff C85A13.
Preferably, the hydroxyl value of the polyester TPU particles is 105 mgKOH/g-110 mgKOH/g, the Shore hardness is 65A-75A, the weight average molecular weight is 8 ten thousand-9 ten thousand, the soft segment adopts polybutyl adipate with the molecular weight of 550-700, the soft segment accounts for 52% -56%, the hydroxyl value of the polyether TPU particles is 108 mgKOH/g-112 mgKOH/g, the Shore hardness is 90A-95A, the weight average molecular weight is 10 ten thousand-11 ten thousand, and the soft segment adopts PTMEG with the molecular weight of 1100-1200.
Preferably, the temperature of the hot air in the steps S1 and S2 is 230-240 ℃, the pressure of the hot air is 0.15-0.2 MPa, the receiving distance is 30-50 cm, and the introduction angle of the hot air is 50-60 degrees.
Preferably, the collagen solution is a reaction solution obtained by reacting a collagen alkaline aqueous solution with a cross-linking agent ECH for 2-3 hours at the temperature of 105-110 ℃, and the collagen content is 15-20%.
Preferably, the jet quantity of the water jet medium is 10L-15L of the surface area of each square meter of melt-blown inner layer.
Preferably, the volume ratio of the sheath layer to the core layer in the composite spinning in the step S2 is 1:1.5-2.5.
Preferably, the diameter of the melt-blown inner layer single fiber in the step S1 is 2-5 mu m, and the diameter of the melt-blown surface layer single fiber in the step S2 is 6-12 mu m.
Preferably, the melt-blown inner layer of step S1 has a grammage of 5g/m 2～15g/m2 and the melt-blown outer layer of step S2 has a grammage of 15g/m 2～30g/m2.
Compared with the prior art, the invention has the following beneficial effects:
the TPU non-woven fabric comprises a melt-blown lining layer and a melt-blown surface layer, wherein single fibers of the melt-blown surface layer are of a sheath-core composite structure, the surface of the single fibers of the melt-blown lining layer is of a porous rough structure, collagen liquid is adopted as a water-jet medium to be grafted on the surface and porous position of the single fibers of the melt-blown lining layer and the surface of the single fibers of the melt-blown surface layer when the melt-blown lining layer is compounded with the melt-blown surface layer, the natural antibacterial property and skin-friendly wetting force of the collagen are utilized to improve the antibacterial skin-friendly property of the melt-blown lining layer, the antibacterial rate is more than 90%, meanwhile, the skin layer of the melt-blown surface layer adopts low-melting polyether TPU particles, so that the single fibers of the melt-blown surface layer and the single fibers of the melt-blown lining layer are firmly solidified in the final hot air drying process, and the hot air drying also plays the roles of drying and removing free water in the collagen liquid and further consolidating covalent bond grafting of the collagen on the melt-blown lining layer through a cross-linking agent ECH.
The melt-blown inner layer adopts solvent-resistant TPU particles and epoxy resin particles, and the introduction of the epoxy resin particles plays two roles, namely, the melt flow temperature and the melt viscosity of the solvent-resistant TPU particles are reduced, the spinnability of the TPU is improved, the formation of a TPU continuous phase is facilitated, the single fiber size and the mechanical performance after the epoxy resin is removed by controlling the solvent decrement are facilitated, the porous rough surface is obtained by single fiber treatment of the melt-blown inner layer, and the carboxyl functional groups on the surface of the single fiber after the plasma treatment are increased, so that more collagen is grafted, the consolidation force of the melt-blown inner layer and the melt-blown inner layer is improved, and the interlayer peeling strength is more than 2.0N/5 cm.
The TPU non-woven fabric can be applied to health-related purposes such as medical treatment/nursing and the like, mainly comprises disposable articles such as paper diapers, sanitary napkins, gauze, bandages, masks, gloves, wound dressings and the like, and can also be applied to the fields of clothing fabrics, leather and the like.
Detailed Description
Example 1
The embodiment provides a TPU non-woven fabric production process, which specifically comprises the following steps:
S1, adding solvent-resistant TPU particles C85A13 and epoxy resin particles into a screw extruder according to the mass ratio of 3:1, blending and melting to obtain spinning solution, wherein the die head temperature is 225 ℃, the hot air temperature is 240 ℃, the hot air pressure is 0.15MPa, the receiving distance is 40cm, the hot air introduction angle is 60 ℃, the fiber web is paved on a lapping machine by adopting a melt blowing method, then the fiber web is sent into a soaking tank to be soaked in an organic solvent of acetone without tension to dissolve and remove the epoxy resin, the soaking time is 1.5 hours, the soaking temperature is 45 ℃, the hot air drying, the consolidation bonding and the rolling are carried out to obtain a melt-blown inner layer, the hot air temperature is 130 ℃, the diameter of a single fiber is 3-4 mu m, the surface of the single fiber is in a porous rough structure, and the gram weight is 10.5g/m 2.
S2, feeding the melt-blown lining layer obtained in the step S1 to a feeding part of a melt-blown cloth production line, unwinding the melt-blown lining layer, performing plasma treatment, then feeding the melt-blown lining layer into a web forming machine, wherein the vacuum degree of a plasma cavity is 10 -5～10-6, the plasma power is 100W, the treatment time is 8min, performing sheath-core composite spinning by taking polyether TPU particles as a sheath material and polyester TPU particles as a core material, wherein the volume ratio of the sheath layer to the core layer is 1:2, the hot air temperature is 230 ℃, the hot air pressure is 0.2MPa, the receiving distance is 30cm, the hot air introducing angle is 60 ℃, and collecting the melt-blown lining layer on the surface of the melt-blown lining layer at the web forming machine to obtain the melt-blown lining layer, the single fiber diameter of the melt-blown lining layer is 10 mu m, and the gram weight is 18.5g/m 2.
And S3, treating the melt-blown surface layer and the melt-blown inner layer overlapped in the step S2 by taking a collagen liquid as a water-jet medium, wherein the collagen liquid is a reaction liquid obtained by reacting a collagen alkaline aqueous solution with a cross-linking agent ECH for 2 hours at the temperature of 110 ℃, the collagen content is 15%, the jet quantity of the water-jet medium is 15L of the surface area of the melt-blown inner layer per square meter, and finally, drying by hot air, trimming and rolling, and the temperature of the hot air is 115 ℃. The antibacterial rate of staphylococcus aureus of the TPU non-woven fabric reaches 95.5 percent (GB/T20944.3-2008: oscillation method), and the interlayer peeling strength (JIS K6854-3:T type peeling) is 2.2N/5cm.
Example 2
The embodiment provides a TPU non-woven fabric production process, which specifically comprises the following steps:
S1, adding solvent-resistant TPU particles C85A13 and epoxy resin particles into a screw extruder according to the mass ratio of 2:1, blending and melting to obtain spinning solution, wherein the die head temperature is 225 ℃, the hot air temperature is 240 ℃, the hot air pressure is 0.15MPa, the receiving distance is 40cm, the hot air introduction angle is 60 ℃, the fiber web is paved on a lapping machine by adopting a melt blowing method, then the fiber web is sent into a soaking tank to be soaked in an organic solvent of acetone without tension to dissolve and remove the epoxy resin, the soaking time is 1.5 hours, the soaking temperature is 45 ℃, the hot air drying, the consolidation bonding and the rolling are carried out to obtain a melt-blown inner layer, the hot air temperature is 135 ℃, the diameter of a single fiber is 2-3 mu m, the surface of the single fiber is in a porous rough structure, and the gram weight is 8g/m 2.
S2, feeding the melt-blown lining layer obtained in the step S1 to a feeding part of a melt-blown cloth production line, unwinding the melt-blown lining layer, performing plasma treatment, then feeding the melt-blown lining layer into a web forming machine, wherein the vacuum degree of a plasma cavity is 10 -5～10-6, the plasma power is 80W, the treatment time is 10min, performing sheath-core composite spinning by taking polyether TPU particles as a sheath material and polyester TPU particles as a core material, wherein the volume ratio of the sheath layer to the core layer is 1:2.5, the hot air temperature is 230 ℃, the hot air pressure is 0.2MPa, the receiving distance is 30cm, the hot air introducing angle is 60 ℃, and collecting the melt-blown lining layer on the surface of the melt-blown lining layer at the web forming machine to obtain the melt-blown lining layer, wherein the single fiber diameter of the melt-blown lining layer is 8 mu m, and the gram weight is 25.5g/m 2.
And S3, treating the melt-blown surface layer and the melt-blown inner layer overlapped in the step S2 by taking a collagen liquid as a water-jet medium, wherein the collagen liquid is a reaction liquid obtained by reacting a collagen alkaline aqueous solution with a cross-linking agent ECH for 2 hours at the temperature of 110 ℃, the collagen content is 20%, the jet quantity of the water-jet medium is 10L of the surface area of the melt-blown inner layer per square meter, and finally, drying by hot air, trimming and rolling are carried out, and the temperature of the hot air is 112 ℃. The antibacterial rate of staphylococcus aureus of the TPU non-woven fabric reaches 96.3 percent (GB/T20944.3-2008: oscillation method), and the interlayer peeling strength (JIS K6854-3:T type peeling) is 2.1N/5cm.
The hydroxyl value of the polyester TPU particles in the embodiment 1 and the embodiment 2 is 105 mgKOH/g-110 mgKOH/g, the Shore hardness is 65A-75A, the weight average molecular weight is 8 ten thousand-9 ten thousand, the soft segment is polybutyl adipate with the molecular weight of 550-700, the soft segment accounts for 52% -56%, the melting range is 120-130 ℃ and the melting range is 190-200 ℃, the hydroxyl value of the polyether TPU particles is 108 mgKOH/g-112 mgKOH/g, the Shore hardness is 90A-95A, the weight average molecular weight is 10 ten thousand-11 ten thousand, the soft segment is PTMEG with the molecular weight of 1100-1200 and the melting range is 120-130 ℃.
Comparative example 1
The comparative example 1 is different from the above example 1 only in that the step S3 is not a hydroentangled medium treatment but a direct hot air drying, and the antibacterial rate of the prepared TPU nonwoven fabric is remarkably reduced.
Comparative example 2
The difference between comparative example 2 and example 1 is that the spinning solution in step S1 contains no epoxy resin particles but only solvent-resistant TPU particles, and the soaking treatment is not performed, so that the antibacterial rate of the produced TPU nonwoven fabric is reduced by about 5.3% and the peel strength is reduced by 28.5% compared with example 1.
While the basic principles and main features of the invention and advantages of the invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing description merely illustrate the principles of the invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (9)
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| CN117569006B true CN117569006B (en) | 2025-08-19 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101432478A (en) * | 2006-05-31 | 2009-05-13 | 三井化学株式会社 | Nonwoven fabric laminate and method for producing same |
| CN102068924A (en) * | 2010-12-22 | 2011-05-25 | 中国科学院长春应用化学研究所 | Polytetrafluoroethylene composite membrane and preparation method thereof |
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| CN116676718B (en) * | 2023-06-08 | 2023-10-13 | 江苏臻圈科技有限公司 | Unidirectional moisture-conducting TPU elastic bandage and preparation method thereof |
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