CN112030362B - High-barrier polypropylene SMS (short message service) non-woven fabric and preparation method thereof - Google Patents
High-barrier polypropylene SMS (short message service) 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)
-
- 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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- 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
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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
- D10B2401/02—Moisture-responsive characteristics
- D10B2401/021—Moisture-responsive characteristics hydrophobic
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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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- 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
- D10B2509/00—Medical; Hygiene
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention provides a preparation method of a high-barrier polypropylene SMS non-woven fabric, which adopts the raw materials of a PP spinning binding material, a PP melt-blown material, a blue color master batch special for spun bonding and a blue color master batch special for melt blowing, and the mass ratio is 60-74: 25-38: 0.8-2.0; 0.8-2.0. The preparation method comprises a tertiary antibody after-finishing step; the three-resistance after finishing: the adopted oil agent comprises a penetrating agent, an antistatic agent, fluoride and water; the penetrant is low-carbon alcohol, the antistatic agent is phosphate, and the fluoride is fluorine-containing acrylate polymer. The high-barrier polypropylene SMS non-woven fabric prepared by the invention has good water permeability resistance, barrier property, alcohol resistance, antistatic property and air permeability, and has good comfort.
Description
Technical Field
The invention belongs to the technical field of non-woven fabrics, and particularly relates to a high-barrier polypropylene SMS non-woven fabric and a preparation method thereof.
Background
The polypropylene SMS non-woven fabric has good mechanical property and barrier property and can be widely applied to disposable medical surgical gowns. The SMS non-woven fabric subjected to the three-resistance treatment (alcohol resistance, blood resistance and static resistance) can effectively isolate the cross infection of bacteria and pathogens, is convenient to use, is safe and sanitary, and is a main material of high-end medical operating gowns. Chinese medicine industry standard YY/T0506.2-2016, European standard BS EN 13795-1: 2019 and American standard AAMI PB70:2012 provide specific performance indexes for surgical gowns. YY/T0506.2-2016 and BS EN 13795-1: 2019 divide the operating gown into standard performance and high performance according to different operation processes, operation time and liquid bearing size, and indicate the requirements of key areas and non-key areas, wherein the water impermeability of the key areas with the standard performance is more than or equal to 20cm of water column. The AAMI PB70:2012 divides the surgical gown into four grades according to the exposure amount of liquid, the area and the mode of blood exposure and the operation time, and different specific requirements are provided for the water seepage resistance, wherein the water seepage resistance of the grade 3 protection is more than or equal to 50cm of water column under the acceptable quality level of 4 percent. The better the water impermeability, the higher the barrier property of the product, the better the protective property. The invention provides 44.1g of SMS non-woven fabric with three-resistance finishing, which has the water permeability resistance of 65cm water column and higher protection level, and a production process thereof.
The operating gown can effectively prevent cross infection of germs and is an important barrier for protecting patients and medical staff in the operation process. As the fabric of the operating coat, the non-woven fabric in the prior art cannot simultaneously achieve better water permeability resistance, separation, alcohol resistance, antistatic performance and air permeability, and has better comfort.
Disclosure of Invention
The invention aims to solve the technical problems and provides a high-barrier polypropylene SMS non-woven fabric and a preparation method thereof, which achieve the following aims: the invention has higher water permeability resistance, can provide better barrier and protective properties, has good alcohol resistance, antistatic property and air permeability, and meets the requirements of safe and comfortable use.
The technical scheme adopted by the invention is as follows: a preparation method of a high-barrier polypropylene SMS non-woven fabric comprises the following steps:
step 1, SMS substrate preparation
1) Mixing of raw materials
The raw materials comprise PP spinning adhesive, 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 60-74: 25-38: 0.8-2.0; 0.8-2.0;
the PP spunbonded material comprises: MFR range 33-39g/10 min;
the PP melt-blown material comprises the following components: MFR range 1100-1800g/10 min;
the blue color master batch special for the spun-bonded fabric comprises the following components: MFR range 18-58 g/10 min;
the special blue color masterbatch for melt-blowing comprises the following components: MFR range 80-480 g/10 min;
the blue color master batch special for spun bonding and the blue color master batch special for melt blowing are transmitted to a main screw rod through an auxiliary material tank by compressed air, and the blue color master batch special for spun bonding and a PP spinning bonding material as well as the blue color master batch special for melt blowing and the PP melt blowing material are uniformly mixed under the shearing force of the screw rod respectively to obtain a spun bonding mixture and a melt blowing mixture.
2) Raw material melt extrusion
Respectively melting the spunbonded mixture and the melt-blown mixture, and quantitatively extruding by a metering pump, wherein the spunbonded melting temperature is in a range of 220-245 ℃, and the melt-blown melting temperature is in a range of 230-260 ℃.
3) Fiber drawing web
Setting high-speed airflow to stably draft the melt to obtain fine denier fiber, wherein the drafting process for forming the spun-bonded fiber comprises the following steps: the pressure of the cold air bin is 2400-2900Pa, and the temperature of the cold air is 16-25 ℃; drawing process for melt-blown fiber formation: hot air volume 3600 and 4300 m3Hr, hot air temperature 245-. A spunbond fiber fineness of 1.3-2.0 denier and a meltblown fiber fineness of 1-3 μm are obtained. The spun-bonded fiber has larger fineness and can provide excellent tensile strength, elongation and mechanical property as an outer layer (S layer) of the material; the fineness of the melt-blown fiber is small, and the melt-blown fiber serving as a material core layer (M layer) can provide excellent barrier and shielding performance and ensure the water seepage resistance of the SMS material. The spun-bonded fibers and the melt-blown fibers are sequentially and uniformly laid on a mesh belt to form a multilayer fiber mesh, the fiber mesh structure is one of SMMMMS, SMMMS, SMMS, SSMMMMS and SSMMMS, and the gram weight (areal density) is about 44.1 g/square meter.
4) Hot rolling reinforcement
The hot rolling and reinforcing process adopts the temperature of a pattern roller of 143-149 ℃, the temperature of a smooth roller of 148-157 ℃ and the pressure of a rolling mill of 85-90 daN/cm.
The process adopts the pressure and the temperature for treatment, and can balance the strength and the barrier property of the material.
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 2, finishing after three-resistance
1) Mixing preparation of oil agent
The components of the oil agent comprise a penetrating agent, an antistatic agent, fluoride and water;
the penetrating agent is low-carbon alcohol, and the content of the penetrating agent is 0.20-0.5% of the total mass of the oil agent; six carbon alcohols are preferred.
The antistatic agent is phosphate, and the content of the antistatic agent is 0.12-0.18% of the total mass of the oil agent; anionic and nonionic phosphate salts are preferred.
The fluoride is a fluorine-containing acrylate polymer, the content of the fluoride is 0.60-0.80% of the total mass of the oil agent, the main chain of the fluorine-containing acrylate polymer is polyolefin, and the side chain of the fluorine-containing acrylate polymer 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 kinds of functional oil and water are mixed homogeneously and conveyed via pipeline into liquid tank in certain frequency.
The base material selects lower fluoride and antistatic concentration, so that enough fluoride and antistatic are carried on the cloth cover tape to meet related requirements, and the water impermeability and air permeability of the base material are not damaged.
2) Oiling
The SMS substrate is unwound and smoothly enters a liquid tank under certain tension through a guide roller, wherein the working temperature of an oiling agent in the liquid tank needs to be below 35 ℃, and newly-configured oiling agent is continuously supplemented in the processing process to keep the concentration of a working solution stable. Through dipping, the cloth surface is uniformly wetted, and excess oiling agent is pricked by a pair of rollers, so that the cloth surface is coated with 110-130% of liquid carrying amount, wherein the roller pressure is 60-70psi, and the cloth surface needs uniform liquid carrying, thereby avoiding uneven color and performance caused by overhigh content of local oiling agent.
3) Drying by baking
And drying the oiled SMS non-woven fabric by hot air of an oven. The hot air is formed by heating natural gas, convection is formed above and below the wet base cloth, and the wet base cloth is fully dried, so that the oil forms a continuous and uniform protective film on the surface of the SMS, the permeation of water, alcohol and blood is resisted, an antistatic layer is formed, and the material has antistatic performance. Drying and shaping the cloth surface under the action of hot air, and discharging excessive water vapor through an exhaust pipeline.The hot air temperature of the drying process is 125-3/hr。
4) Cooling and shaping
And cooling, shaping, winding and forming the SMS after drying in the oven by a cooling device. The cold air temperature is 20-25 ℃, and the cloth cover discharged from the drying oven is cooled and shaped under the action of the cold air.
5) Slitting and rolling
And cutting the cooled cloth, cutting into proper width by a cutter, and rolling.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) the high-barrier polypropylene SMS non-woven fabric prepared by the invention has the gram weight of 40-45 g/square meter non-woven fabric, and the antistatic water pressure mean value is 85-95 cmH on the basis of 7 rating of the alcohol resistance mean value and 0.05 sec of static attenuation (50% RH,10% cut-off)2O, hydrostatic pressure single value 65-68 cmH2O；
(2) The high-barrier polypropylene SMS non-woven fabric prepared by the invention has the gram weight of 40-45 g/square meter non-woven fabric, and has the air permeability average value of 25cfm and the wear-resistant average value of 5 mg on the basis of 7 rating of the alcohol resistance average value and 0.05 sec of static attenuation (50% RH and 10% cut-off).
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.
Embodiment 1 a method for preparing a high barrier polypropylene SMS nonwoven fabric, comprising the steps of:
step 1, SMS substrate preparation
1) Mixing of raw materials
The raw materials comprise PP spinning adhesive, 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 60: 25: 0.8: 0.8;
the PP spunbonded material comprises: MFR range 33-35g/10 min;
the PP melt-blown material comprises the following components: MFR range 1100-1300g/10 min;
the blue color master batch special for the spun-bonded fabric comprises the following components: MFR range 18-32g/10 min;
the special blue color masterbatch for melt-blowing comprises the following components: MFR range 80-150g/10 min;
the blue color master batch special for spun bonding and the blue color master batch special for melt blowing are transmitted to a main screw rod through an auxiliary material tank by compressed air, and the blue color master batch special for spun bonding and a PP spinning bonding material as well as the blue color master batch special for melt blowing and the PP melt blowing material are uniformly mixed under the shearing force of the screw rod respectively to obtain a spun bonding mixture and a melt blowing mixture.
2) Raw material melt extrusion
Respectively melting the spunbonded mixture and the melt-blown mixture, and quantitatively extruding by a metering pump, wherein the spunbonded melting temperature is 220 ℃, and the melt-blown melting temperature is 260 ℃.
3) Fiber drawing web
Setting high-speed airflow to stably draft the melt to obtain fine denier fiber, wherein the drafting process for forming the spun-bonded fiber comprises the following steps: the pressure of a cold air bin is 2400Pa, and the temperature of cold air is 16 ℃; drawing process for melt-blown fiber formation: hot air volume 3600 m3Hr, hot air temperature 265 ℃. Spun-bonded fibers of a fineness of 1.3 to 2.0 denier and meltblown fibers of a fineness of 1 to 3 μm are obtained. The spun-bonded fiber has larger fineness and can provide excellent tensile strength, elongation and mechanical property as an outer layer (S layer) of the material; the fineness of the melt-blown fiber is small, and the melt-blown fiber serving as a material core layer (M layer) can provide excellent barrier and shielding performance and ensure the water seepage resistance of the SMS material. The spun-bonded fibers and the melt-blown fibers are sequentially and uniformly laid on a net belt to form a multilayer fiber net, the fiber net structure is SMMMMS, and the gram weight (area density) is about 44.1 g/square meter.
4) Hot rolling reinforcement
The hot rolling and reinforcing process adopts a pattern roller temperature of 147 ℃, a smooth roller temperature of 154 ℃ and a rolling mill pressure of 90 daN/cm.
The process adopts the pressure and the temperature for treatment, and can balance the strength and the barrier property of the material.
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 2, finishing after three-resistance
1) Mixing preparation of oil agent
The components of the oil agent comprise a penetrating agent, an antistatic agent, fluoride and water;
the penetrating agent is hexa-carbon alcohol, and the content of the penetrating agent is 0.20 percent of the total mass of the oil agent;
the antistatic agent is anionic phosphate, and the content of the antistatic agent is 0.12 percent of the total mass of the oil agent;
the fluoride is an amphoteric fluorine-containing acrylate polymer, the content of the fluoride is 0.60 percent of the total mass of the oil agent, the main chain of the fluorine-containing acrylate polymer is polyolefin, and the side chain of the fluorine-containing acrylate polymer is an ester group containing a fluorocarbon chain.
The prepared oil agent needs to be used within 24 hours. The three kinds of functional oil and water are mixed homogeneously and conveyed via pipeline into liquid tank in certain frequency.
2) Oiling
The SMS substrate is unwound and smoothly enters a liquid tank under certain tension through a guide roller, wherein the working temperature of an oiling agent in the liquid tank needs to be below 35 ℃, and newly-configured oiling agent is continuously supplemented in the processing process to keep the concentration of a working solution stable. Through dipping, the cloth cover is evenly moistened, excess oiling agent is pricked through a pair of rollers, 110% of liquid carrying amount on the cloth cover is enabled to be carried, wherein the roller pressure is 60psi, the cloth cover needs to carry liquid evenly, and uneven color and performance caused by overhigh content of local oiling agent are avoided.
3) Drying by baking
And drying the oiled SMS non-woven fabric by hot air of an oven. The hot air is formed by heating natural gas, convection is formed above and below the wet base cloth, and the wet base cloth is fully dried, so that the oil forms a continuous and uniform protective film on the surface of the SMS, the permeation of water, alcohol and blood is resisted, an antistatic layer is formed, and the material has antistatic performance. Drying and shaping the cloth surface under the action of hot air, and discharging excessive water vapor through an exhaust pipeline. The hot air temperature of the drying process is 125 ℃, the hot air speed is 36m/s, the drying time is 60 seconds, and the exhaust air volume is 16000Nm3/hr。
4) Cooling and shaping
And cooling, shaping, winding and forming the SMS after drying in the oven by a cooling device. The cold air temperature is 20 ℃, and the cloth cover discharged from the drying oven is cooled and shaped under the action of the cold air.
5) Slitting and rolling
And cutting the cooled cloth, cutting into proper width by a cutter, and rolling.
Embodiment 2 a method for preparing a high barrier polypropylene SMS nonwoven fabric, comprising the steps of:
step 1, SMS substrate preparation
1) Mixing of raw materials
The raw materials comprise a PP spinning binding material, a PP melt-blown material, a blue color master batch special for spunbond and a blue color master batch special for melt-blown, and the weight ratio is 68: 30: 1.5: 1.2;
the PP spunbonded material comprises: MFR range 35-37g/10 min;
the PP melt-blown material comprises the following components: MFR range 1300-1500g/10 min;
the blue color master batch special for the spun-bonded fabric comprises the following components: MFR range 32-45g/10 min;
the special blue color masterbatch for melt-blowing comprises the following components: MFR range 150-280 g/10 min;
the blue color master batch special for spun bonding and the blue color master batch special for melt blowing are transmitted to a main screw rod through an auxiliary material tank by compressed air, and the blue color master batch special for spun bonding and a PP spinning bonding material as well as the blue color master batch special for melt blowing and the PP melt blowing material are uniformly mixed under the shearing force of the screw rod respectively to obtain a spun bonding mixture and a melt blowing mixture.
2) Raw material melt extrusion
Melting the spunbonded mixture and the melt-blown mixture respectively, and quantitatively extruding by a metering pump, wherein the spunbonded melting temperature is 235 ℃, and the melt-blown melting temperature is 245 ℃.
3) Fiber drawing web
Setting high-speed airflow to stably draft the melt to obtain fine denier fiber, wherein the drafting process for forming the spun-bonded fiber comprises the following steps: the pressure of a cold air bin is 2700Pa, and the temperature of cold air is 21 ℃; drawing process for melt-blown fiber formation: hot air quantity 4100 m3Hr, hot air temperature 255 ℃. A spunbond fiber fineness of 1.3-2.0 denier and a meltblown fiber fineness of 1-3 μm are obtained. Spun-bonded fiberThe material has larger fineness and can provide excellent tensile strength, elongation and mechanical property as an outer layer (S layer) of the material; the fineness of the melt-blown fiber is small, and the melt-blown fiber serving as a material core layer (M layer) can provide excellent barrier and shielding performance and ensure the water seepage resistance of the SMS material. The spun-bonded fibers and the melt-blown fibers are sequentially and uniformly laid on a mesh belt to form a multilayer fiber mesh, the fiber mesh structure is SSMMMMS, and the gram weight (area density) is about 44.1 g/square meter.
4) Hot rolling reinforcement
The hot rolling and reinforcing process adopts a pattern roller temperature of 145 ℃, a smooth roller temperature of 150 ℃ and a rolling mill pressure of 85 daN/cm.
The process adopts the pressure and the temperature for treatment, and can balance the strength and the barrier property of the material.
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 2, finishing after three-resistance
1) Mixing preparation of oil agent
The components of the oil agent comprise a penetrating agent, an antistatic agent, fluoride and water;
the penetrating agent is hexa-carbon alcohol, and the content of the penetrating agent is 0.3 percent of the total mass of the oil agent;
the antistatic agent is nonionic phosphate, and the content of the antistatic agent is 0.15 percent of the total mass of the oil agent;
the fluoride is nonionic fluorine-containing acrylate polymer, the content of the fluoride is 0.70% of the total mass of the oil agent, the main chain of the fluorine-containing acrylate polymer is polyolefin type, and the side chain of the fluorine-containing acrylate polymer is an ester group containing a fluorocarbon chain.
The prepared oil agent needs to be used within 24 hours.
The three kinds of functional oil and water are mixed homogeneously and conveyed via pipeline into liquid tank in certain frequency.
2) Oiling
The SMS substrate is unwound and smoothly enters a liquid tank under certain tension through a guide roller, wherein the working temperature of an oiling agent in the liquid tank needs to be below 35 ℃, and newly-configured oiling agent is continuously supplemented in the processing process to keep the concentration of a working solution stable. Through dipping, the cloth cover is evenly moistened, redundant oil agent is pricked through a pair of rollers, 120% of liquid carrying amount on the cloth cover is enabled to be carried, wherein the roller pressure is 65psi, the cloth cover needs to carry liquid evenly, and uneven color and performance caused by overhigh content of local oil agent are avoided.
3) Drying by baking
And drying the oiled SMS non-woven fabric by hot air of an oven. The hot air is formed by heating natural gas, convection is formed above and below the wet base cloth, and the wet base cloth is fully dried, so that the oil forms a continuous and uniform protective film on the surface of the SMS, the permeation of water, alcohol and blood is resisted, an antistatic layer is formed, and the material has antistatic performance. Drying and shaping the cloth surface under the action of hot air, and discharging excessive water vapor through an exhaust pipeline. The hot air temperature of the drying process is 130 ℃, the hot air speed is 40m/s, the drying time is 90 seconds, and the exhaust air volume is 16000Nm3/hr。
4) Cooling and shaping
And cooling, shaping, winding and forming the SMS after drying in the oven by a cooling device. The cold air temperature is 22 ℃, and the cloth cover discharged from the drying oven is cooled and shaped under the action of the cold air.
5) Slitting and rolling
And cutting the cooled cloth, cutting into proper width by a cutter, and rolling.
Embodiment 3 a method for preparing a high barrier polypropylene SMS nonwoven fabric, comprising the steps of:
step 1, SMS substrate preparation
1) Mixing of raw materials
The raw materials comprise a PP spinning binding material, a PP melt-blown material, a blue color master batch special for spunbond and a blue color master batch special for melt-blown, and the weight ratio is 74: 38: 2.0: 2.0;
the PP spunbonded material comprises: MFR range 37-39g/10 min;
the PP melt-blown material comprises the following components: MFR range 1500-1800g/10 min;
the blue color master batch special for the spun-bonded fabric comprises the following components: MFR range 45-58 g/10 min;
the special blue color masterbatch for melt-blowing comprises the following components: MFR range 280-480 g/10 min;
the blue color master batch special for spun bonding and the blue color master batch special for melt blowing are transmitted to a main screw rod through an auxiliary material tank by compressed air, and the blue color master batch special for spun bonding and a PP spinning bonding material as well as the blue color master batch special for melt blowing and the PP melt blowing material are uniformly mixed under the shearing force of the screw rod respectively to obtain a spun bonding mixture and a melt blowing mixture.
2) Raw material melt extrusion
Respectively melting the spunbonded mixture and the melt-blown mixture, and quantitatively extruding by a metering pump, wherein the spunbonded melting temperature is 245 ℃, and the melt-blown melting temperature is 240 ℃.
3) Fiber drawing web
Setting high-speed airflow to stably draft the melt to obtain fine denier fiber, wherein the drafting process for forming the spun-bonded fiber comprises the following steps: the cold air cabin pressure is 2900Pa, and the cold air temperature is 25 ℃; drawing process for melt-blown fiber formation: hot air volume 4300 m3Hr, hot air temperature 245 ℃. A spunbond fiber fineness of 1.3-2.0 denier and a meltblown fiber fineness of 1-3 μm are obtained. The spun-bonded fiber has larger fineness and can provide excellent tensile strength, elongation and mechanical property as an outer layer (S layer) of the material; the fineness of the melt-blown fiber is small, and the melt-blown fiber serving as a material core layer (M layer) can provide excellent barrier and shielding performance and ensure the water seepage resistance of the SMS material. The spun-bonded fibers and the melt-blown fibers are sequentially and uniformly laid on a mesh belt to form a multilayer fiber mesh, the fiber mesh structure is SSMMMS, and the gram weight (area density) is about 44.1 g/square meter.
4) Hot rolling reinforcement
The temperature of a pattern roller adopted in the hot rolling and reinforcing process is 143 ℃, the temperature of a smooth roller is 149 ℃, and the pressure of a rolling mill is 85 daN/cm.
The process adopts the pressure and the temperature for treatment, and can balance the strength and the barrier property of the material.
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 2, finishing after three-resistance
1) Mixing preparation of oil agent
The components of the oil agent comprise a penetrating agent, an antistatic agent, fluoride and water;
the penetrating agent is hexa-carbon alcohol, and the content of the penetrating agent is 0.5 percent of the total mass of the oil agent;
the antistatic agent is nonionic phosphate, and the content of the antistatic agent is 0.18 percent of the total mass of the oil agent;
the fluoride is nonionic fluorine-containing acrylate polymer, the content of the fluoride is 0.80% of the total mass of the oil agent, the main chain of the fluorine-containing acrylate polymer is polyolefin type, and the side chain of the fluorine-containing acrylate polymer is an ester group containing a fluorocarbon chain.
The prepared oil agent needs to be used within 24 hours.
The three kinds of functional oil and water are mixed homogeneously and conveyed via pipeline into liquid tank in certain frequency.
2) Oiling
The SMS substrate is unwound and smoothly enters a liquid tank under certain tension through a guide roller, wherein the working temperature of an oiling agent in the liquid tank needs to be below 35 ℃, and newly-configured oiling agent is continuously supplemented in the processing process to keep the concentration of a working solution stable. Through dipping, the cloth cover is evenly moistened, redundant oil agents are pricked through a pair of rollers, 130% of liquid carrying capacity is carried on the cloth cover, the roller pressure is 70psi, the cloth cover needs to carry liquid evenly, and uneven color and performance caused by overhigh content of local oil agents are avoided.
3) Drying by baking
And drying the oiled SMS non-woven fabric by hot air of an oven. The hot air is formed by heating natural gas, convection is formed above and below the wet base cloth, and the wet base cloth is fully dried, so that the oil forms a continuous and uniform protective film on the surface of the SMS, the permeation of water, alcohol and blood is resisted, an antistatic layer is formed, and the material has antistatic performance. Drying and shaping the cloth surface under the action of hot air, and discharging excessive water vapor through an exhaust pipeline. The hot air temperature of the drying process is 135 ℃, the hot air speed is 44m/s, the drying time is 150 seconds, and the exhaust air volume is 16000Nm3/hr。
4) Cooling and shaping
And cooling, shaping, winding and forming the SMS after drying in the oven by a cooling device. The cold air temperature is 25 ℃, and the cloth cover discharged from the drying oven is cooled and shaped under the action of the cold air.
5) Slitting and rolling
And cutting the cooled cloth, cutting into proper width by a cutter, and rolling.
Comparative example 1 a method for preparing a polypropylene SMS nonwoven fabric, comprising the steps of:
step 1, SMS substrate preparation
1) Mixing of raw materials
The raw materials comprise PP spinning adhesive, 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 82: 18: 0.8: 2.0;
the blue color master batch special for spun bonding and the blue color master batch special for melt blowing are transmitted to a main screw rod through an auxiliary material tank by compressed air, and the blue color master batch special for spun bonding and a PP spinning bonding material as well as the blue color master batch special for melt blowing and the PP melt blowing material are uniformly mixed under the shearing force of the screw rod respectively to obtain a spun bonding mixture and a melt blowing mixture.
2) Raw material melt extrusion
Same as in example 2.
3) Fiber drawing web
Same as in example 2.
4) Hot rolling reinforcement
The hot rolling and reinforcing process adopts a pattern roller temperature of 156 ℃, a smooth roller temperature of 160 ℃ and a rolling mill pressure of 95 daN/cm.
5) Slitting and rolling
Same as in example 2.
Step 2, finishing after three-resistance
1) Mixing preparation of oil agent
The components of the oil agent comprise a penetrating agent, an antistatic agent, fluoride and water;
the penetrating agent is high-carbon alcohol, and the content of the penetrating agent is 0.6 percent of the total mass of the oil agent;
the antistatic agent is phosphate, and the content of the antistatic agent is 0.25 percent of the total mass of the oil agent;
the fluoride is a fluorine-containing acrylate polymer, and the content of the fluoride is 1.00 percent of the total mass of the oil agent.
The prepared oil agent needs to be used within 24 hours.
The three kinds of functional oil and water are mixed homogeneously and conveyed via pipeline into liquid tank in certain frequency.
2) Oiling
Same as in example 2
3) Drying by baking
Same as in example 2
4) Cooling and shaping
Same as in example 2.
5) 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 average value of the antistatic water pressure of the prepared non-woven fabric with the gram weight of 40-45 g/square meter is 85-95 cmH2O, hydrostatic pressure single value 65-68 cmH2O, air permeability average of 25cfm and abrasion resistance average of 5 mg.
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 (7)
1. A preparation method of a high-barrier polypropylene SMS non-woven fabric is characterized by comprising the following steps: the adopted raw materials comprise PP spinning bonding material, 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 60-74: 25-38: 0.8-2.0; 0.8-2.0;
the preparation method also comprises a tertiary antibody after-finishing step; the three-resistance after finishing: the adopted oil agent comprises a penetrating agent, an antistatic agent, fluoride and water; the penetrating agent is hexacarbonol; the antistatic agent is phosphate, and the fluoride is a fluorine-containing acrylate polymer;
the content of the penetrating agent is 0.20-0.5% of the total mass of the oil agent, the content of the antistatic agent is 0.12-0.18% of the total mass of the oil agent, and the content of the fluoride is 0.60-0.80% of the total mass of the oil agent;
the preparation method also comprises an oiling step; oiling: the working temperature of the oil agent is below 35 ℃, the liquid content of the cloth surface is 110-;
the high-barrier polypropylene SMS non-woven fabric has the gram weight of 40-45 g/square meter, the mean value of the hydrostatic pressure of 85-95 cmH2O, the single value of the hydrostatic pressure of 65-68 cmH2O, the mean value of air permeability of 25cfm and the mean value of wear resistance of 5 mg.
2. The preparation method of the high-barrier polypropylene SMS non-woven fabric according to claim 1, characterized in that: the PP spunbonded material comprises: MFR range 33-39g/10 min; the PP melt-blown material comprises the following components: the MFR range is 1100-1800g/10 min.
3. The preparation method of the high-barrier polypropylene SMS non-woven fabric according to claim 1, characterized in that: the blue color master batch special for the spun-bonded fabric comprises the following components: MFR range 18-58 g/10 min; the special blue color masterbatch for melt-blowing comprises the following components: the MFR ranges from 80 to 480 g/10 min.
4. The preparation method of the high-barrier polypropylene SMS non-woven fabric according to claim 1, characterized in that: the preparation method comprises a raw material melt extrusion step; the raw materials are subjected to melt extrusion: the melt temperature of the spun-bonded fiber is 220-245 ℃, and the melt temperature of the melt-blown fiber is 230-260 ℃.
5. The preparation method of the high-barrier polypropylene SMS non-woven fabric according to claim 1, characterized in that: the preparation method also comprises a fiber drafting web forming step; the fiber is drawn into a net: drawing process for forming spun-bonded fiber: the pressure of the cold air bin is 2400-2900Pa, and the temperature of the cold air is 16-25 ℃; drawing process for melt-blown fiber formation: the hot air volume is 3600-.
6. The preparation method of the high-barrier polypropylene SMS non-woven fabric according to claim 1, characterized in that: the preparation method also comprises a hot rolling and reinforcing step; the hot rolling reinforcement comprises the following steps: the temperature of the adopted pattern roller is 143-149 ℃, the temperature of the smooth roller is 148-157 ℃, and the pressure of the rolling mill is 85-90 daN/cm.
7. The preparation method of the high-barrier polypropylene SMS non-woven fabric according to claim 1, characterized in that: the preparation method also comprises a drying step; and (3) drying: the hot air temperature of the drying process is 125-.
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| CN113604961B (en) * | 2021-08-28 | 2022-05-17 | 山东驼王非织造布有限公司 | Preparation method of water-repellent antibacterial polypropylene non-woven fabric |
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