CN112030361B - Soft medical surgical gown SMS non-woven fabric and preparation method thereof - Google Patents
Soft medical surgical gown SMS non-woven fabric and preparation method thereof Download PDFInfo
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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
- D04H1/559—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 the fibres being within layered webs
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/12—Surgeons' or patients' gowns or dresses
- A41D13/1209—Surgeons' gowns or dresses
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- 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
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
- D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
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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
- D04H1/542—Adhesive fibres
- D04H1/544—Olefin series
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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
- D04H1/558—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in combination with mechanical or physical treatments other than embossing
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- 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
- D04H3/14—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 thermoplastic yarns or filaments produced by welding
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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
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—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 thermoplastic yarns or filaments produced by welding
- D04H3/147—Composite yarns or filaments
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2401/00—Physical properties
- D10B2401/16—Physical properties antistatic; conductive
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- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
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- D10B2509/00—Medical; Hygiene
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Abstract
The invention provides a preparation method of soft medical surgical gown SMS non-woven fabric, which adopts the raw materials of PP spinning binding material, polyolefin copolymer, amide additive, PP melt-blown material, blue color master batch special for spun bonding and blue color master batch special for melt-blown, and the mass ratio is 50-65: 15-25: 0-3: 18-25: 0.5-3.0: 0.5-3.0. The preparation method comprises a melt extrusion step; the melt extrusion: the screw temperature adopted by the spun-bonded mixture is 225-235 ℃, the melt pipe temperature is 230-235 ℃ and the die head temperature is 233-238 ℃. The screw temperature adopted by the melt-blown mixture is 235-245 ℃, the melt pipe temperature is 245-255 ℃, and the die head temperature is 255-260 ℃. The preparation method further comprises a hot rolling step; hot rolling: the method selects a pattern roller with 12-15% of hot rolling area, the roller temperature is 148-. The invention obviously improves the softness and smoothness of the SMS non-woven fabric, and meanwhile, the prepared non-woven fabric has good strength and protective shielding performance.
Description
Technical Field
The invention belongs to the technical field of non-woven fabrics, and particularly relates to a soft SMS non-woven fabric for medical surgical gowns and a preparation method thereof.
Background
With the progress of human science and technology and the development of medical knowledge, people gradually increase the awareness of sterilization, virus infection and protection in the operation process, and the application of the operating gown is widely developed. It has been found that patients have a high rate of mortality during or after surgery without protection, and that medical personnel are susceptible to infectious pathogens. The operating coat is a safety barrier for protecting medical staff and patients in the operating process, and can effectively reduce the mutual transmission of germs and microorganisms. After the development of more than half a century, the fabrics of the operating gown are continuously innovated in the protection level from loose, easily permeable and recyclable cotton woven fabrics, waterproof treated high-density woven fabrics, disposable non-woven materials with excellent dry and wet protection performance and membrane composite fabrics with higher protection level, and form the current universal material selection. At present, SMS non-woven fabrics, spunlace non-woven fabrics, spun-bonded fabrics or SMS non-woven fabric laminating materials are commonly used as materials of disposable operating gowns.
The disposable medical surgical gown made of the spunlace non-woven fabric which is formed by wood pulp fibers and polyester staple fibers through water needle high-speed puncture and winding has good softness which is close to the hand feeling and the comfort of the traditional woven fabric, but is far inferior to the SMS non-woven fabric in barrier shielding capability, and has poor water seepage resistance and liquid sputtering resistance, so the application market is limited, and the spunlace non-woven fabric is high in price and is mostly compounded with a breathable microporous membrane to form a product. The spun-bonded or SMS non-woven fabric film product can effectively prevent blood germs from penetrating due to small pores of the microporous film, but has poor air permeability, moisture removal and wearing comfort and is not suitable for long-time work of medical staff. Ordinary SMS non-woven fabrics that polypropylene material was made have good protection, separation performance through three anti arrangements, are superior to the compound membrane material in the wearing comfort level, nevertheless still have certain distance with traditional cotton class material, can influence medical personnel's use body sense, the lasting tolerance of work under the long-time operating condition. The object of the present invention is to provide a soft SMS nonwoven fabric that brings comfort of softness and cotton feeling while maintaining excellent strength and barrier properties.
Disclosure of Invention
The invention aims to solve the technical problems and provides a soft SMS non-woven fabric for medical surgical gowns and a preparation method thereof, so that the following aims are achieved: the softness and smoothness of the SMS non-woven fabric are remarkably improved, and meanwhile, the prepared non-woven fabric has good strength and protective shielding performance.
The technical scheme adopted by the invention is as follows:
a preparation method of soft SMS non-woven fabric for medical surgical gowns comprises the following steps:
step 1, mixing raw materials
The raw materials comprise PP spinning adhesive, polyolefin copolymer, amide additives, PP melt-blown material, blue master batch special for spun bonding and blue master batch special for melt-blown, and the mass ratio is 50-65: 15-25: 0-3: 18-25: 0.5-3.0: 0.5-3.0; the PP spinning binding material comprises the following components: MFR range 33-39 g/10 min;
the polyolefin copolymer: the ethylene-propylene copolymer has a melting point of 130-155 ℃ and an ethylene content of 5-20%.
The amide additive is as follows: the melting point is between 155 ℃ and 160 ℃, and the components comprise PP and additives; the additive is erucamide with a content of 20-30%.
The PP melt-blown material comprises the following components: MFR range 1100-1800 g/10 min;
the special blue master batch for the spun-bonded fabric comprises the following components: MFR range 18-58 g/10 min;
the special blue master batch for melt-blown production comprises the following steps: MFR range 80-480 g/10 min;
the polyolefin copolymer, the amide additive and the blue master batch special for the spun-bonded are respectively sucked into respective auxiliary material hoppers through compressed air, are uniformly extruded and added into a spun-bonded main screw rod under the screw rod, and are uniformly mixed with the PP spun-bonded material under the shearing action of the main screw rod to obtain the spun-bonded mixture.
And (3) conveying the special blue master batch for melt-blowing into an auxiliary material hopper by compressed air, extruding into a melt-blowing main screw by a screw, and uniformly mixing with the PP melt-blowing material to obtain a melt-blowing mixture.
Step 2, melt extrusion
The spunbonded mixture is melted and extruded by a screw extruder, the temperature of the adopted screw is 225-235 ℃, the temperature of the melt pipe is 230-235 ℃, and the temperature of the die head is 233-238 ℃.
The melt-blown mixture is melt extruded by a screw extruder, the temperature of the adopted screw is 235-245 ℃, the temperature of the melt pipe is 245-255 ℃, and the temperature of the die head is 255-260 ℃.
Step 3, fiber drafting
1) Drawing of spunbond fibers
After the melt extrusion of the spun-bonded mixture, the fiber is stably drafted through airflow to obtain fine denier fiber, wherein the air volume of the airflow is 2400-.
The spun-bonded fiber obtains a uniform fiber web through slit adjustment, so that stronger water repellency and better material air permeability are obtained.
2) Drawing of melt blown fibers
After melt extrusion of the melt-blown mixture, forming superfine fibers with the diameter of 1-3 mu m by hot air drafting; the hot air volume is 3800 plus 4500 m3/hr, hot air temperature 240-.
The melt-blown fiber is laid between two layers of the spun-bonded fiber to provide the capability of water resistance and barrier, and the SMS non-woven fabric is prepared.
Step 4, hot rolling
After fiber drawing and lapping are carried out according to SMS non-woven fabric, a pattern roller with 12-15% of hot rolling area is selected, the roller temperature is 148-.
Step 5, slitting and rolling
And cutting the SMS non-woven fabric subjected to hot rolling reinforcement into required width by a cutter, and winding the SMS non-woven fabric into a coiled material.
Step 6, finishing after three-resistance
The SMS non-woven fabric material produced according to the procedures is uncoiled and subjected to anti-alcohol and anti-static water bath finishing, and the steps are as follows:
a) mixing of oil solutions
The components of the oil agent comprise a penetrating agent, an antistatic agent and fluoride; the penetrating agent is an alcohol penetrating agent, and preferably low-carbon alcohol.
The antistatic agent is a phosphate salt, preferably an anionic and a nonionic phosphate salt.
The fluoride is a fluorine-containing acrylate polymer, the main chain of the acrylic fluorine-containing polymer is a polyolefin type, and the side chain is an ester group containing a fluorocarbon chain; amphoteric, nonionic fluoroacrylate polymers are preferred.
The prepared oil agent needs to be used within 24 hours. The three functional chemicals and water are stirred and mixed evenly and are conveyed into the liquid tank through a pipeline.
b) Oiling
And (4) unwinding the SMS coiled material formed in the step (5) into a liquid tank, wetting the cloth surface by using an oiling agent, and rolling the cloth surface by using a pair of rollers to remove redundant liquid, so that the cloth surface is uniformly oiled by taking 120% of the liquid content on the cloth surface, and the uniform performance is ensured.
c) Drying by baking
Drying the SMS non-woven fabric with the liquid by an oven. Drying the oil agent under the action of hot air to form a fluorine-containing water repellent film and an antistatic layer on the cloth surface, and discharging excessive steam through an exhaust pipeline; the drying temperature is 120-; the dried SMS non-woven fabric has the penetrant content of 0.30-0.70% of the total mass of the non-woven fabric, the antistatic agent content of 0.35-0.50% of the total mass of the non-woven fabric and the fluoride content of 1.0-1.3% of the total mass of the non-woven fabric.
d) Slitting and rolling
And cutting the SMS non-woven fabric out of the oven into pieces with proper width by a cutter, and winding the pieces into rolls.
The technical scheme of the invention has the following beneficial effects:
1. the method obviously improves the softness and smoothness of the SMS non-woven fabric, prepares the non-woven fabric with the gram weight of 38-45 gsm, and has the MD HOM of 25-35 g, the CD HOM of 13-19 g and the COF of 0.20-0.29.
2. Meanwhile, the non-woven fabric prepared by the invention has good strength and protective shielding performance; the preparation method has the advantages that the non-woven fabric with the gram weight of 38-45 gsm is prepared, the CD grabbing strength reaches 77.4-80.0N, the MD tear strength reaches 26.7-30.0N, the antistatic water pressure mean value reaches 73.0-80 cmH2O, the antistatic water pressure single value reaches 53.0-58.0 cmH2O, the air permeability mean value reaches 38.0-45.0cfm, the anti-isopropanol reaches 8 grades, and the static attenuation reaches 0.05 sec.
Detailed Description
The present application will be described in further detail with reference to examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example 1
A preparation method of soft SMS non-woven fabric for medical surgical gowns comprises the following steps:
step 1, mixing raw materials
The raw materials comprise PP spinning adhesive, polyolefin copolymer, amide additives, PP melt-blown material, blue master batch special for spun bonding and blue master batch special for melt-blown, and the mass ratio is 50: 15: 1: 18: 0.5: 0.5;
the PP spinning binding material comprises the following components: MFR is 33-35g/10 min;
the polyolefin copolymer: the ethylene-propylene copolymer has a melting point of 130-155 ℃ and an ethylene content of 5 percent.
The amide additive is as follows: the melting point is between 155 ℃ and 160 ℃, and the components comprise PP and additives; the additive is erucamide, and the content is 20%.
The PP melt-blown material comprises the following components: MFR is 1100-1300 g/10 min;
the special blue master batch for the spun-bonded fabric comprises the following components: MFR is 18-28 g/10 min;
the special blue master batch for melt-blown production comprises the following steps: MFR is 80-190 g/10 min;
the polyolefin copolymer, the amide additive and the blue master batch special for the spun-bonded are respectively sucked into respective auxiliary material hoppers through compressed air, are uniformly extruded and added into a spun-bonded main screw rod under the screw rod, and are uniformly mixed with the PP spun-bonded material under the shearing action of the main screw rod to obtain the spun-bonded mixture.
And (3) conveying the special blue master batch for melt-blowing into an auxiliary material hopper by compressed air, extruding into a melt-blowing main screw by a screw, and uniformly mixing with the PP melt-blowing material to obtain a melt-blowing mixture.
Step 2, melt extrusion
The spunbonded mixture is melted and extruded by a screw extruder, wherein the temperature of the screw is 225 ℃, the temperature of a melt pipe is 230 ℃, and the temperature of a die head is 233 ℃.
The melt-blown mixture is melt extruded by a screw extruder, the temperature of the adopted screw is 245 ℃, the temperature of a melt pipe is 255 ℃, and the temperature of a die head is 260 ℃.
Step 3, fiber drafting
1) Drawing of spunbond fibers
After the melt extrusion of the spun-bonded mixture, the fiber is stably drafted through airflow to obtain fine denier fiber, wherein the air volume of the airflow is 2400Pa, and the air temperature is 18 ℃.
The spun-bonded fiber obtains a uniform fiber web through slit adjustment, so that stronger water repellency and better material air permeability are obtained.
2) Drawing of melt blown fibers
After melt extrusion of the melt-blown mixture, forming superfine fibers with the diameter of 1-3 mu m by hot air drafting; the hot air quantity is 4500 m3Hr, hot air temperature 260 ℃.
The melt-blown fiber is laid between two layers of the spun-bonded fiber to provide the capability of water resistance and barrier, and the SMS non-woven fabric is prepared.
Step 4, hot rolling
After the fiber is drawn and lapped according to the SMS non-woven fabric, a pattern roller with the hot rolling area of 12 percent is selected, the roller temperature is 148 ℃, and the rolling mill pressure is 60N, so that the strength and the barrier property of the material are balanced, and the softness of the cloth cover can be improved.
Step 5, slitting and rolling
And cutting the SMS non-woven fabric subjected to hot rolling reinforcement into required width by a cutter, and winding the SMS non-woven fabric into a coiled material.
Step 6, finishing after three-resistance
The SMS non-woven fabric material produced according to the procedures is uncoiled and subjected to anti-alcohol and anti-static water bath finishing, and the steps are as follows:
a) mixing of oil solutions
The components of the oil agent comprise a penetrating agent, an antistatic agent, fluoride and water;
the penetrating agent is a low-carbon alcohol penetrating agent;
the antistatic agent is anionic phosphate;
the fluoride is an amphoteric fluoroacrylate polymer.
The prepared oil agent needs to be used within 24 hours. The three functional chemicals and water are stirred and mixed evenly and are conveyed into the liquid tank through a pipeline.
b) Oiling
And (4) unwinding the SMS coiled material formed in the step (5) into a liquid tank, wetting the cloth surface by using an oiling agent, and rolling to remove redundant liquid through a pair of rollers, so that the cloth surface is provided with 100% of liquid, and the cloth surface is oiled uniformly to ensure uniform performance.
c) Drying by baking
Drying the SMS non-woven fabric with the liquid by an oven. The oil solution is dried under the action of hot air, a fluorine-containing water repellent film and an antistatic layer are formed on the cloth surface, and redundant water vapor is discharged through an exhaust pipeline. The drying temperature is 120 ℃, and the drying time is 60 seconds; the content of the penetrant, the antistatic agent and the fluoride in the dried SMS non-woven fabric are respectively 0.30%, 0.35% and 1.0% of the total mass of the non-woven fabric.
d) Slitting and rolling
And cutting the SMS non-woven fabric out of the oven into pieces with proper width by a cutter, and winding the pieces into rolls.
Example 2
A preparation method of soft SMS non-woven fabric for medical surgical gowns comprises the following steps:
step 1, mixing raw materials
The raw materials comprise PP spinning adhesive, polyolefin copolymer, amide additives, PP melt-blown material, blue master batch special for spun bonding and blue master batch special for melt-blown, and the mass ratio is 58: 19: 2: 22: 1: 1;
the PP spinning binding material comprises the following components: MFR is 35-37 g/10 min;
the polyolefin copolymer: the ethylene-propylene copolymer has a melting point of 130-155 ℃ and an ethylene content of 17 percent.
The amide additive is as follows: the melting point is between 155 ℃ and 160 ℃, and the components comprise PP and additives; the additive is erucamide, and the content is 25%.
The PP melt-blown material comprises the following components: MFR range 1300-1500 g/10 min;
the special blue master batch for the spun-bonded fabric comprises the following components: MFR range 28-35 g/10 min;
the special blue master batch for melt-blown production comprises the following steps: MFR range 200-350 g/10 min;
the polyolefin copolymer, the amide additive and the blue master batch special for the spun-bonded are respectively sucked into respective auxiliary material hoppers through compressed air, are uniformly extruded and added into a spun-bonded main screw rod under the screw rod, and are uniformly mixed with the PP spun-bonded material under the shearing action of the main screw rod to obtain the spun-bonded mixture.
And (3) conveying the special blue master batch for melt-blowing into an auxiliary material hopper by compressed air, extruding into a melt-blowing main screw by a screw, and uniformly mixing with the PP melt-blowing material to obtain a melt-blowing mixture.
Step 2, melt extrusion
The spunbonded mixture is melted and extruded by a screw extruder, wherein the temperature of the screw is 230 ℃, the temperature of a melt pipe is 233 ℃, and the temperature of a die head is 235 ℃.
The melt-blown mixture is melted and extruded by a screw extruder, the temperature of the adopted screw is 240 ℃, the temperature of a melt pipe is 250 ℃, and the temperature of a die head is 258 ℃.
Step 3, fiber drafting
1) Drawing of spunbond fibers
After the melt extrusion of the spun-bonded mixture, the fiber is stably drafted through airflow to obtain fine denier fiber, the air volume of the airflow is 2550Pa, and the air temperature is 20 ℃.
The spun-bonded fiber obtains a uniform fiber web through slit adjustment, so that stronger water repellency and better material air permeability are obtained.
2) Drawing of melt blown fibers
After melt extrusion of the melt-blown mixture, forming superfine fibers with the diameter of 1-3 mu m by hot air drafting; the hot air volume is 4200 m3Hr, hot air temperature 250 ℃.
The melt-blown fiber is laid between two layers of the spun-bonded fiber to provide the capability of water resistance and barrier, and the SMS non-woven fabric is prepared.
Step 4, hot rolling
After fiber drawing and lapping are carried out on SMS non-woven fabric, a pattern roller with 14% of hot rolling area is selected, the roller temperature is 150 ℃, and the rolling mill pressure is 62N, so that the strength and the barrier property of the material are balanced, and the softness of the cloth cover can be improved.
Step 5, slitting and rolling
And cutting the SMS non-woven fabric subjected to hot rolling reinforcement into required width by a cutter, and winding the SMS non-woven fabric into a coiled material.
Step 6, finishing after three-resistance
The SMS non-woven fabric material produced according to the procedures is uncoiled and subjected to anti-alcohol and anti-static water bath finishing, and the steps are as follows:
a) mixing of oil solutions
The components of the oil agent comprise a penetrating agent, an antistatic agent, fluoride and water;
the penetrating agent is a low-carbon alcohol penetrating agent;
the antistatic agent is nonionic phosphate;
the fluoride is a non-ionic fluoroacrylate polymer.
The prepared oil agent needs to be used within 24 hours. The three functional chemicals and water are stirred and mixed evenly and are conveyed into the liquid tank through a pipeline.
b) Oiling
And (4) unwinding the SMS coiled material formed in the step (5) into a liquid tank, wetting the cloth surface by using an oiling agent, and rolling to remove redundant liquid through a pair of rollers, so that 110% of the liquid carrying amount of the cloth surface is carried on the cloth surface, and the cloth surface is oiled uniformly to ensure uniform performance.
c) Drying by baking
Drying the SMS non-woven fabric with the liquid by an oven. The oil solution is dried under the action of hot air, a fluorine-containing water repellent film and an antistatic layer are formed on the cloth surface, and redundant water vapor is discharged through an exhaust pipeline. The drying temperature is 130 ℃, and the drying time is 90 seconds; the content of the penetrant, the antistatic agent and the fluoride in the dried SMS non-woven fabric are respectively 0.50%, 0.4% and 1.2%, respectively.
d) Slitting and rolling
And cutting the SMS non-woven fabric out of the oven into pieces with proper width by a cutter, and winding the pieces into rolls.
Example 3
A preparation method of soft SMS non-woven fabric for medical surgical gowns comprises the following steps:
step 1, mixing raw materials
The raw materials comprise a PP spinning binding material, a polyolefin copolymer, a PP melt-blown material, a blue master batch special for spunbond and a blue master batch special for melt-blown, and the mass ratio is 65: 25: 25: 3.0: 3.0;
the PP spinning binding material comprises the following components: MFR is 35-39 g/10 min;
the polyolefin copolymer: the ethylene-propylene copolymer has a melting point of 130-155 ℃ and an ethylene content of 20 percent.
The PP melt-blown material comprises the following components: MFR range 1600-1800 g/10 min;
the special blue master batch for the spun-bonded fabric comprises the following components: MFR range 35-58 g/10 min;
the special blue master batch for melt-blown production comprises the following steps: MFR range 350-480 g/10 min;
the polyolefin copolymer and the blue master batch special for the spunbond are respectively sucked into respective auxiliary material hoppers through compressed air, are uniformly extruded and added into a spunbond main screw rod under the screw rod, and are uniformly mixed with the PP spunbond material under the shearing action of the main screw rod to obtain the spunbond mixture.
And (3) conveying the special blue master batch for melt-blowing into an auxiliary material hopper by compressed air, extruding into a melt-blowing main screw by a screw, and uniformly mixing with the PP melt-blowing material to obtain a melt-blowing mixture.
Step 2, melt extrusion
The spunbonded mixture was melt extruded through a screw extruder at 235 ℃ for the screw, 235 ℃ for the melt pipe and 238 ℃ for the die head.
The melt-blown mixture is melted and extruded by a screw extruder, the temperature of the adopted screw is 235 ℃, the temperature of a melt pipe is 245 ℃, and the temperature of a die head is 250 ℃.
Step 3, fiber drafting
1) Drawing of spunbond fibers
After the melt extrusion of the spun-bonded mixture, the fiber is stably drafted through airflow to obtain fine denier fiber, wherein the air volume of the airflow is 2700Pa, and the air temperature is 22 ℃.
The spun-bonded fiber obtains a uniform fiber web through slit adjustment, so that stronger water repellency and better material air permeability are obtained.
2) Drawing of melt blown fibers
After melt extrusion of the melt-blown mixture, forming superfine fibers with the diameter of 1-3 mu m by hot air drafting; the hot air volume is 3800 m3Hr, hot air temperature 240 ℃.
The melt-blown fiber is laid between two layers of the spun-bonded fiber to provide the capability of water resistance and barrier, and the SMS non-woven fabric is prepared.
Step 4, hot rolling
After fiber drawing and lapping are carried out on SMS non-woven fabric, a pattern roller with 15% of hot rolling area is selected, the roller temperature is 152 ℃, and the rolling mill pressure is 65N, so that the strength and the barrier property of the material are balanced, and the softness of the cloth cover can be improved.
Step 5, slitting and rolling
And cutting the SMS non-woven fabric subjected to hot rolling reinforcement into required width by a cutter, and winding the SMS non-woven fabric into a coiled material.
Step 6, finishing after three-resistance
The SMS non-woven fabric material produced according to the procedures is uncoiled and subjected to anti-alcohol and anti-static water bath finishing, and the steps are as follows:
a) mixing of oil solutions
The components of the oil agent comprise a penetrating agent, an antistatic agent, fluoride and water;
the penetrating agent is a low-carbon alcohol penetrating agent;
the antistatic agent is nonionic phosphate;
the fluoride is a non-ionic fluoroacrylate polymer.
The prepared oil agent needs to be used within 24 hours. The three functional chemicals and water are stirred and mixed evenly and are conveyed into the liquid tank through a pipeline.
b) Oiling
And (4) unwinding the SMS coiled material formed in the step (5) into a liquid tank, wetting the cloth surface by using an oiling agent, and rolling to remove redundant liquid through a pair of rollers, so that the cloth surface is provided with 120% of liquid carrying capacity, and the cloth surface is oiled uniformly to ensure uniform performance.
c) Drying by baking
Drying the SMS non-woven fabric with the liquid by an oven. The oil solution is dried under the action of hot air, a fluorine-containing water repellent film and an antistatic layer are formed on the cloth surface, and redundant water vapor is discharged through an exhaust pipeline. The drying temperature is 140 ℃, and the drying time is 120 seconds; the content of the penetrant, the antistatic agent and the fluoride in the dried SMS non-woven fabric are respectively 0.70%, 0.5% and 1.3%, respectively.
d) Slitting and rolling
And cutting the SMS non-woven fabric out of the oven into pieces with proper width by a cutter, and winding the pieces into rolls.
Comparative example 1
The preparation method comprises the following steps:
step 1, mixing raw materials
The raw materials comprise PP spinning adhesive, PP melt-blown material, special blue master batch for spunbond and special blue master batch for melt-blown, and the mass ratio is 80-85: 15-20: 0.5-3.0: 0.5-3.0.
The polyolefin copolymer and the blue master batch special for the spunbond are respectively sucked into respective auxiliary material hoppers through compressed air, are uniformly extruded and added into a spunbond main screw rod under the screw rod, and are uniformly mixed with the PP spunbond material under the shearing action of the main screw rod to obtain the spunbond mixture.
And (3) conveying the special blue master batch for melt-blowing into an auxiliary material hopper by compressed air, extruding into a melt-blowing main screw by a screw, and uniformly mixing with the PP melt-blowing material to obtain a melt-blowing mixture.
Step 2, melt extrusion
The spunbonded mixture is melted and extruded by a screw extruder, wherein the temperature of the screw is 235 ℃, the temperature of a melt pipe is 240 ℃, and the temperature of a die head is 245 ℃.
The melt-blown mixture is melted and extruded by a screw extruder, the temperature of the adopted screw is 250 ℃, the temperature of a melt pipe is 260 ℃, and the temperature of a die head is 270 ℃.
Step 3, fiber drafting
1) Drawing of spunbond fibers
After the melt extrusion of the spun-bonded mixture, the fiber is stably drafted through airflow to obtain fine denier fiber, wherein the air volume of the airflow is 3000Pa, and the air temperature is 25 ℃.
2) Drawing of melt blown fibers
The melt-blown fiber is laid between two layers of the spun-bonded fiber to provide the capability of water resistance and barrier, and the SMS non-woven fabric is prepared.
Step 4, hot rolling
After fiber drawing and lapping are carried out according to SMS non-woven fabric, a pattern roller with 18 percent of hot rolling area is selected, the roller temperature is 156-160 ℃, and the rolling mill pressure is 95N.
Step 5, slitting and rolling
Same as in example 2.
Step 6, finishing after three-resistance
The SMS non-woven fabric material produced according to the procedures is uncoiled and subjected to anti-alcohol and anti-static water bath finishing, and the steps are as follows:
a) mixing of oil solutions
The components of the oil agent comprise a penetrating agent, an antistatic agent and fluoride;
the prepared oil agent needs to be used within 24 hours. The three functional chemicals and water are stirred and mixed evenly and are conveyed into the liquid tank through a pipeline.
b) Oiling
Same as in example 2.
c) Drying by baking
Drying the SMS non-woven fabric with the liquid by an oven. The oil solution is dried under the action of hot air, a fluorine-containing water repellent film and an antistatic layer are formed on the cloth surface, and redundant water vapor is discharged through an exhaust pipeline. The drying temperature is 110 ℃, and the drying time is 20 seconds; the content of the penetrant, the antistatic agent and the fluoride in the dried SMS non-woven fabric are respectively 0.90%, 0.5% and 1.4% of the total mass of the non-woven fabric.
d) Slitting and rolling
Same as in example 2.
Through detection, the technical indexes of the non-woven fabrics prepared in the examples 1 to 3 and the comparative example 1 are shown in the table 1;
TABLE 1
The method is adopted to prepare the non-woven fabric with the gram weight of 38-45 gsm, the MD HOM reaches 25.0-35.0 g, the CD HOM reaches 13.0-19.0 g, the COF reaches 0.20-0.29, and the wear-resistant average value reaches 1.85-2.0 mg. Meanwhile, the CD grabbing strength reaches 77.4-80.0N, the MD tearing strength reaches 26.7-30.0N, the antistatic water pressure average value reaches 73.0-80 cmH2O, the antistatic water pressure single value reaches 53.0-58.0 cmH2O, the ventilation average value reaches 38.0-45.0cfm, the anti-isopropanol reaches 8 grades, and the static attenuation reaches 0.05 sec.
The COF (coefficient of friction) detection method comprises the following steps:
the method is used for detecting the friction coefficient of the non-woven fabric so as to measure the smoothness of the surface of the non-woven fabric, and the friction coefficient instrument is used for testing equipment. The test sample should be left for more than 16h at 23 + -2 deg.C and 50 + -5% environment, and then the test is carried out under the same environment. Samples were taken 80mm x 250 mm and 63mm x120mm size with the sample long side being the MD direction. The test specimens should be flat and wrinkle free. A sample of 80mm x 250 mm is flatly fixed on a horizontal test bed of a friction coefficient instrument, and the MD direction of the sample is parallel to the length direction of the sample bed. The other sample 63mmX120mm was placed with its surface facing down, wrapped with a slider, and fixed, taking care that the sample was placed in a direction parallel to the direction of the sample on the horizontal test stand, the slider had a mass of 200 + -2 g, a square with a side of 63mm on the bottom, and the bottom was covered with felt. The slide block with the fixed sample is placed in the center of a sample of 80mm x 250 mm without impact, the test directions of the two samples are parallel to the sliding direction, a force measuring system is just not stressed, the two samples are kept for 15s after being contacted, the instrument automatically operates to enable the two samples to move relatively, the two samples operate along the MD direction of the samples, the force vertically applied to the two contact surfaces is 200g, and the device is static after the test is finished, and the coefficient of friction value is read.
The non-woven fabric prepared by the method has the advantages of obviously enhanced cotton feeling, proper smoothness, good water impermeability and good barrier property.
Except for special description, the percentages are mass percentages, and the proportions are mass ratios.
Although the embodiments of the present invention have been described in detail, the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (8)
1. A preparation method of soft SMS non-woven fabric for medical surgical gowns is characterized by comprising the following steps: the adopted raw materials comprise PP spinning adhesive, polyolefin copolymer, amide additives, PP melt-blown material, blue master batch special for spunbond and blue master batch special for melt-blown, and the mass ratio is 50-65: 15-25: 0-3: 18-25: 0.5-3.0: 0.5-3.0;
the preparation method also comprises a tertiary antibody after-finishing step; and (3) finishing after the three-resistance: the adopted oil agent components comprise a penetrating agent, an antistatic agent and fluoride; after oiling and drying, the content of the penetrating agent is 0.30-0.70% of the total mass of the non-woven fabric, the content of the antistatic agent is 0.35-0.50% of the total mass of the non-woven fabric, and the content of the fluoride is 1.0-1.3% of the total mass of the non-woven fabric;
sucking the polyolefin copolymer, the amide additive and the blue master batch special for the spunbond into respective auxiliary material hoppers through compressed air respectively, extruding and adding the mixture into a spunbond main screw rod uniformly under the screw rod, and then mixing the mixture and a PP spunbond material uniformly under the shearing action of the main screw rod to obtain a spunbond mixture;
conveying the special blue master batch for melt-blown into an auxiliary material hopper by compressed air, extruding the special blue master batch into a melt-blown main screw by a screw, and uniformly mixing the special blue master batch with a PP melt-blown material to obtain a melt-blown mixture;
the preparation method further comprises a hot rolling step;
hot rolling: selecting a pattern roller with 12-15% of hot rolling area, and adopting the roller temperature of 148 ℃ and 152 ℃ and the rolling mill pressure of 60-65N;
the gram weight of the SMS non-woven fabric is 38-45 gsm, the MD HOM reaches 25.0-35.0 g, the CD HOM reaches 13.0-19.0 g, the COF reaches 0.20-0.29, and the wear-resistant average value reaches 1.85-2.0 mg; meanwhile, the CD grabbing strength reaches 77.4-80.0N, the MD tearing strength reaches 26.7-30.0N, the antistatic water pressure average value reaches 73.0-80 cmH2O, the antistatic water pressure single value reaches 53.0-58.0 cmH2O, the ventilation average value reaches 38.0-45.0cfm, the anti-isopropanol reaches 8 grades, and the static attenuation reaches 0.05 sec.
2. The method for preparing the soft SMS non-woven fabric for the medical surgical gown according to claim 1, wherein the method comprises the following steps: the PP spinning binding material comprises the following components: MFR range 33-39 g/10 min;
the polyolefin copolymer: the ethylene-propylene copolymer has a melting point of 130-155 ℃ and an ethylene content of 5-20%.
3. The method for preparing the soft SMS non-woven fabric for the medical surgical gown according to claim 1, wherein the method comprises the following steps: the amide additive is as follows: the melting point is between 155 ℃ and 160 ℃, and the components comprise PP and additives; the additive is erucamide with a content of 20-30%.
4. The method for preparing the soft SMS non-woven fabric for the medical surgical gown according to claim 1, wherein the method comprises the following steps: the PP melt-blown material comprises the following components: MFR range 1100-1800 g/10 min;
the special blue master batch for the spun-bonded fabric comprises the following components: MFR range 18-58 g/10 min;
the special blue master batch for melt-blown production comprises the following steps: the MFR ranges from 80 to 480 g/10 min.
5. The method for preparing the soft SMS non-woven fabric for the medical surgical gown according to claim 1, wherein the method comprises the following steps: the preparation method further comprises a melt extrusion step; the melt extrusion: the spunbonded mixture is melted and extruded by a screw extruder, the temperature of the adopted screw is 225-235 ℃, the temperature of the melt pipe is 230-235 ℃, and the temperature of the die head is 233-238 ℃.
6. The method for preparing the soft SMS non-woven fabric for the medical surgical gown as claimed in claim 5, wherein: the melt extrusion: the melt-blown mixture is melt extruded by a screw extruder, the temperature of the adopted screw is 235-245 ℃, the temperature of the melt pipe is 245-255 ℃, and the temperature of the die head is 255-260 ℃.
7. The method for preparing the soft SMS non-woven fabric for the medical surgical gown according to claim 1, wherein the method comprises the following steps: the preparation method also comprises a fiber drafting step; drafting the fiber: drafting the spun-bonded fiber, wherein the air volume of the airflow is 2400 and 2700Pa, and the air temperature is 18-22 ℃.
8. The method for preparing the soft SMS non-woven fabric for the medical surgical gown as claimed in claim 7, wherein: drafting the fiber: drafting the melt-blown fiber, wherein the hot air quantity is 3800-.
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| CN112593347A (en) * | 2020-12-30 | 2021-04-02 | 俊富非织造材料有限公司 | Development of medical SMS with single-sided alcohol resistance and single-sided antistatic performance |
| CN112662069A (en) * | 2020-12-31 | 2021-04-16 | 广西德福莱医疗器械有限公司 | Special dispersing color master batch for melt-blown fabric and preparation method thereof |
| CN113815278A (en) * | 2021-10-18 | 2021-12-21 | 北京熵图医疗科技合伙企业(有限合伙) | Medical wrapping cloth with high antibacterial performance and preparation method thereof |
| CN114016211A (en) * | 2021-10-18 | 2022-02-08 | 北京熵图医疗科技合伙企业(有限合伙) | Medical non-woven material without breaking package and with high antibacterial performance and preparation method |
| CN114481447B (en) * | 2022-01-25 | 2022-11-25 | 苏州艾美医疗用品有限公司 | Production equipment and production process of medical non-woven fabric |
| CN115366494A (en) * | 2022-08-30 | 2022-11-22 | 山东恒鹏卫生用品有限公司 | Three-layer soft composite film fabric and production process thereof |
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