CN113265769B - High-quality electric cotton non-woven fabric material and preparation method thereof - Google Patents
High-quality electric cotton non-woven fabric material and preparation method thereof Download PDFInfo
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- CN113265769B CN113265769B CN202110503096.3A CN202110503096A CN113265769B CN 113265769 B CN113265769 B CN 113265769B CN 202110503096 A CN202110503096 A CN 202110503096A CN 113265769 B CN113265769 B CN 113265769B
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 56
- 239000000463 material Substances 0.000 title claims abstract description 49
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000000835 fiber Substances 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 238000001125 extrusion Methods 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims description 29
- 229940070527 tourmaline Drugs 0.000 claims description 29
- 229910052613 tourmaline Inorganic materials 0.000 claims description 29
- 239000011032 tourmaline Substances 0.000 claims description 29
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 26
- 239000000155 melt Substances 0.000 claims description 21
- 230000003068 static effect Effects 0.000 claims description 21
- 239000004743 Polypropylene Substances 0.000 claims description 18
- -1 polypropylene Polymers 0.000 claims description 16
- 229920001155 polypropylene Polymers 0.000 claims description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 125000002091 cationic group Chemical group 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 230000010355 oscillation Effects 0.000 claims description 12
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 11
- 239000000292 calcium oxide Substances 0.000 claims description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 10
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 6
- 244000060011 Cocos nucifera Species 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 230000005686 electrostatic field Effects 0.000 claims description 5
- 238000004898 kneading Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 14
- 239000000428 dust Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 230000035699 permeability Effects 0.000 abstract description 5
- 238000004080 punching Methods 0.000 abstract description 5
- 238000009960 carding Methods 0.000 abstract description 3
- 238000011068 loading method Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 12
- 239000004744 fabric Substances 0.000 description 11
- 238000001354 calcination Methods 0.000 description 8
- 238000005098 hot rolling Methods 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 238000001179 sorption measurement Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000036760 body temperature Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- 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
- D04H3/16—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 filaments produced in association with filament formation, e.g. immediately following extrusion
-
- 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
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- 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
- D01D5/12—Stretch-spinning methods
- D01D5/14—Stretch-spinning methods with flowing liquid or gaseous stretching media, e.g. solution-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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C29/00—Finishing or dressing, of textile fabrics, not provided for in the preceding groups
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Nonwoven Fabrics (AREA)
- Filtering Materials (AREA)
- Electrostatic Separation (AREA)
- Artificial Filaments (AREA)
Abstract
A preparation method of a high-quality electric cotton non-woven fabric material comprises the steps of premixing, preparation of high-performance electret master batches, melt extrusion, fiber cooling, fiber mixing, drafting and lapping, needle punching and opening and electrostatic addition. The excellent electric cotton non-woven fabric prepared by the preparation method has the advantages that: the impedance is as low as 2Pa, and the filtering efficiency reaches 60 percent, which is reduced by 50 percent compared with the resistance of the traditional PET short fiber carding process; the mechanical strength is high, the gram weight is 25.5-40.3g/m2, the longitudinal breaking strength can reach more than 40N/5cm, and the transverse breaking strength can reach more than 30N/5 cm; the air permeability reaches 6000-; the loading dust holding effect is good; the filtering efficiency can still reach more than 60 percent after the filter is placed for 60 days at the temperature of 45 ℃ and the humidity of 90 percent, the efficiency decay rate is low, and the like.
Description
Technical Field
The invention belongs to the technical field of non-woven fabrics, and particularly relates to a high-quality electric cotton non-woven fabric material and a preparation method thereof.
Background
The non-woven fabric, also called non-woven fabric and non-woven fabric, has the excellent performances of moisture resistance, air permeability, light weight, easy decomposition, no toxicity, no irritation, recycling and the like, and can be widely applied to the fields of medical protection consumables, heat preservation materials, filtering materials, medical and sanitary materials, oil absorption materials, wiping cloth, battery separators, sound insulation materials and the like. The static cotton is used as a non-woven fabric, is a non-woven material obtained by carding PP short fibers, needling the PP short fibers into a net and then carrying out static electret treatment, is called as the static cotton due to the static treatment, has better filtering efficiency than the common needle-punched cotton, and has better resistance and dust holding capacity compared with other filtering materials.
However, the prior art electrostatic cotton material still has the following technical defects: the air resistance is large, the filtering efficiency is not ideal, the attenuation of the electrostatic adsorption capacity is fast, and the service life of the mask is not long.
Patent CN112693182A discloses a gradient filtration static cotton and preparation method thereof, including first static cotton layer, the cotton layer of second static and melt-blown cloth layer, first static cotton layer and melt-blown cloth layer are located the both sides on the cotton layer of second static, the fluffy degree on the cotton layer of first static is greater than the fluffy degree on the cotton layer of second static, utilize fluffy first static cotton layer can intercept the dust of big granule, utilize the cotton layer of closely knit second static to intercept the dust of small granule, but the gradient that this patent was prepared filters static cotton still can not solve the faster problem of static adsorption capacity decay.
The patent CN110499586A discloses an electrostatic cotton material and a preparation method and application thereof, the electrostatic cotton material is composed of bicomponent composite filaments, the bicomponent composite filaments are in a parallel structure, wherein the melt index of the A component material is 34g/10 min-42 g/10 min; the intrinsic viscosity of the component B material is 0.60 dl/g-0.69 dl/g, and the oxygen index exceeds 28.0%, but the electrostatic cotton material prepared by the patent has large air resistance and short service life.
Disclosure of Invention
In order to solve the problems in the prior art and further optimize the prior art, the invention provides an excellent electric cotton non-woven fabric material and a preparation method thereof, namely an electrostatic cotton non-woven fabric material and a preparation method thereof, so as to realize the following purposes:
the gas resistance of the non-woven fabric, especially the gas resistance under high humidity is reduced, the electrostatic adsorption effect is improved, the filtering efficiency is improved, and the service life is prolonged.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a preparation method of a high-quality electric cotton non-woven fabric material comprises the steps of premixing, preparation of high-performance electret master batches, melt extrusion, fiber cooling, fiber mixing, drafting and lapping, needle punching and opening and electrostatic addition.
The pre-mixing step, wherein 70-80 parts by weight of polypropylene slices with a melt index of 35-40g/10min, 15-20 parts by weight of polyester slices, 5-7 parts by weight of modified tourmaline powder, 3-4 parts by weight of coconut shell activated carbon, 2-3 parts by weight of nano titanium dioxide and 1-2 parts by weight of nano calcium oxide are blended in a mixer to obtain a mixed material, wherein the rotating speed of the mixer is 500-550rpm, and the mixing time is 15-20 min; then kneading and extruding the mixture in a double-screw extruder, and cooling and shaping the mixture in a cold water tank at 0-5 ℃, wherein the diameter of a screw of the screw extruder is 50-55mm, the length-diameter ratio is 20-25, the temperature of a machine head is 310 ℃, and the rotating speed of the screw of the double-screw extruder is 200-210 rpm; and after cooling and shaping are finished, a granulator is used for granulation to obtain the nano master batch with the particle size of 200-400 nm.
The particle size of the nano titanium dioxide is 300-350 nm.
The particle size of the nano calcium oxide is 200-250 nm.
The preparation method of the modified tourmaline powder comprises the steps of adding 1kg of 30-50 mesh tourmaline powder into 9kg-10kg of 8-10 mass percent sodium hydroxide solution, heating to 40-45 ℃, stirring for 1h, wherein the stirring time is 400-450rpm, filtering the alkalized tourmaline powder, drying at 120-125 ℃, calcining at 700-750 ℃ after drying is finished, and calcining for 2-3h to obtain the modified tourmaline powder.
Preparing the high-performance electret master batch, namely adding the nano master batch into mixed liquid of methyl methacrylate and a liquid cationic etherifying agent, and performing high-pressure oscillation for 20-25min to obtain the high-performance electret master batch, wherein the pressure in the high-pressure oscillation is 1.7-1.9MPa, and the oscillation frequency is 300-350 Hz;
the manufacturer of the liquid cationic etherifying agent is Zibo Oalt chemical Co., Ltd, and the content is 69%;
the nanometer master batch comprises the following components: methyl methacrylate: the mass ratio of the cationic etherifying agent is 1:9-11: 1.
The melt extrusion is carried out, wherein polypropylene slices with the melt index of 35-40g/10min and the high-performance electret master batches are conveyed into a screw extruder through a material suction pipeline, and are uniformly mixed and subjected to melt extrusion; the screw temperature of the screw extruder is 257-260 ℃, and the box temperature is 230-240 ℃;
the mass ratio of the polypropylene chips with the melt index of 35-40g/10min to the high-performance electret master batches is 95: 5.
And cooling the fibers by adopting a cold air cooling mode, wherein the cold air is controlled at 1000-1200r/min, and the fibers are cooled to 20-25 ℃.
And (3) drafting and lapping, namely drafting the cooled fiber by hot air to form 10-20 mu m spunbonded fiber, then drafting and lapping the fiber, and carrying out hot rolling reinforcement to obtain the spunbonded non-woven fabric, wherein the temperature of a roller in the hot rolling process is 90-120 ℃, and the pressure of a rolling mill is 40-45 bar.
The preparation of the high-quality electric cotton comprises the step of carrying out needling and opening on the spunbonded fabric on needling equipment to obtain a fluffy fabric structure, so that the high-quality electric cotton has an excellent dust holding effect.
And (3) adding static electricity, namely passing the spun-bonded non-woven fabric through an electrostatic field formed by an electrostatic generator to obtain the high-quality cotton non-woven fabric material, wherein the voltage of the electrostatic generator is 60V, and the current is 10-15 mA.
Compared with the prior art, the invention has the beneficial effects that:
(1) the excellent electric cotton non-woven fabric material prepared by the method disclosed by the invention is tested by a GB/T14295 method, the impedance is as low as 2Pa, the filtering efficiency reaches 60%, and the resistance is reduced by 50% compared with that of the traditional PET short fiber carding process;
(2) the excellent electric cotton non-woven fabric material prepared by the method has high mechanical strength, the gram weight of 25.5-40.3g/m2, the longitudinal breaking strength of more than 40N/5cm, the transverse breaking strength of more than 30N/5cm, excellent mechanical property and good durability;
(3) the excellent electric cotton non-woven fabric material prepared by the method has good air permeability, and the air permeability is tested by an air permeability instrument according to the pressure difference test of 20cm2 and 100Pa and reaches 6000-;
(4) the excellent electric cotton non-woven fabric material prepared by the method has excellent thickness index, the gram weight of the product is 25.5-40.3g/m2, the thickness can reach 0.5-0.8mm, and the loading and dust holding effect is good.
(5) The excellent electric cotton non-woven fabric material prepared by the method has strong electrostatic adsorption capacity, the electrostatic adsorption is kept for a long time, the filtering efficiency can still reach more than 60 percent after the material is placed for 60 days at the temperature of 45 ℃ and the humidity of 90 percent, and the efficiency attenuation rate is low;
(6) the excellent electric cotton non-woven fabric material prepared by the method of the invention not only increases the surface area of the fiber, but also increases the porosity of the fiber web.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described.
Example 1
A preparation method of a high-quality electric cotton non-woven fabric material comprises the steps of premixing, preparation of high-performance electret master batches, melt extrusion, fiber cooling, fiber mixing, drafting and lapping, needle punching and opening and electrostatic addition.
The pre-mixing step comprises the steps of blending 70 parts by weight of polypropylene slices with a melt index of 35g/10min, 15 parts by weight of polyester slices, 5 parts by weight of modified tourmaline powder, 3 parts by weight of coconut shell activated carbon, 2 parts by weight of nano titanium dioxide and 1 part by weight of nano calcium oxide in a mixer to obtain a mixture, wherein the rotating speed of the mixer is 500rpm, and the mixing time is 15 min; then kneading and extruding the mixture in a double-screw extruder, and cooling and shaping in a cold water tank at 0 ℃, wherein the diameter of a screw of the double-screw extruder is 50mm, the length-diameter ratio is 20, the temperature of a machine head is 300 ℃, and the rotating speed of the screw of the double-screw extruder is 200 rpm; and after cooling and shaping, granulating by using a granulator to obtain the nano master batch with the particle size of 200 nm.
The particle size of the nano titanium dioxide is 300 nm.
The particle size of the nano calcium oxide is 200 nm.
The preparation method of the modified tourmaline powder comprises the steps of adding 1kg of 30-mesh tourmaline powder into 9kg of 8 mass percent sodium hydroxide solution, heating to 40 ℃, stirring for 1h, wherein the stirring time is 400rpm, filtering the alkalized tourmaline powder, drying at 120 ℃, calcining at 700 ℃ after drying is finished, and calcining for 2h to obtain the modified tourmaline powder.
Preparing the high-performance electret master batch, namely adding the nano master batch into mixed liquid of methyl methacrylate and a liquid cationic etherifying agent, and performing high-pressure oscillation for 20min to obtain the high-performance electret master batch, wherein the pressure in the high-pressure oscillation is 1.7MPa, and the oscillation frequency is 300 Hz;
the manufacturer of the liquid cationic etherifying agent is ZiboOltte chemical engineering Co., Ltd, and the content is 69%;
the nanometer master batch comprises the following components: methyl methacrylate: the mass ratio of the cationic etherifying agent is 1:9: 1.
The melt extrusion is carried out, wherein polypropylene slices with the melt index of 35g/10min and the high-performance electret master batches are conveyed into a screw extruder through a material suction pipeline, and are uniformly mixed and subjected to melt extrusion; the screw temperature of the screw extruder is 257 ℃ and the box body temperature is 230 ℃;
the mass ratio of the polypropylene chips with the melt index of 35g/10min to the high-performance electret master batches is 95: 5.
And cooling the fibers by adopting a cold air cooling mode, wherein the cold air is controlled at 1000r/min, and the fibers are cooled to 20 ℃.
And (3) drafting and lapping, namely drafting the cooled fiber by hot air to form 10-micron spunbonded fiber, then drafting and lapping the fiber, and carrying out hot rolling reinforcement to obtain the spunbonded non-woven fabric, wherein the temperature of a roller in the hot rolling process is 90 ℃, and the pressure of a rolling mill is 40 bar.
The preparation of the high-quality electric cotton comprises the step of carrying out needling and opening on the spunbonded fabric on needling equipment to obtain a fluffy fabric structure, so that the high-quality electric cotton has an excellent dust holding effect.
And the static electricity is added, the spun-bonded non-woven fabric passes through an electrostatic field formed by an electrostatic generator, so that the high-quality cotton non-woven fabric material is obtained, wherein the voltage of the electrostatic generator is 60V, and the current is 10 mA.
Example 2
A preparation method of a high-quality electric cotton non-woven fabric material comprises the steps of premixing, preparation of high-performance electret master batches, melt extrusion, fiber cooling, fiber mixing, drafting and lapping, needle punching and opening and electrostatic addition.
The method comprises the following steps of premixing, namely, 75 parts by weight of polypropylene slices with a melt index of 37g/10min, 17 parts by weight of polyester slices, 6 parts by weight of modified tourmaline powder, 3 parts by weight of coconut shell activated carbon, 2 parts by weight of nano titanium dioxide and 1 part by weight of nano calcium oxide are blended in a mixer to obtain a mixture, wherein the rotating speed of the mixer is 520rpm, and the mixing time is 17 min; then kneading and extruding the mixture in a double-screw extruder, and cooling and shaping in a 2 ℃ cold water tank, wherein the diameter of a screw of the screw extruder is 52mm, the length-diameter ratio is 22, the temperature of a machine head is 305 ℃, and the rotating speed of the screw of the double-screw extruder is 205 rpm; and after cooling and shaping, granulating by using a granulator to obtain the nano master batch with the particle size of 300 nm.
The particle size of the nano titanium dioxide is 320 nm.
The particle size of the nano calcium oxide is 220 nm.
The preparation method of the modified tourmaline powder comprises the steps of adding 1kg of tourmaline powder with 40 meshes into 9.5kg of 9 mass percent sodium hydroxide solution, heating to 42 ℃, stirring for 1h, wherein the stirring time is 420rpm, filtering the alkalized tourmaline powder, drying at 122 ℃, calcining at 720 ℃ after drying is finished, and calcining for 2.5h to obtain the modified tourmaline powder.
Preparing the high-performance electret master batch, namely adding the nano master batch into mixed liquid of methyl methacrylate and a liquid cationic etherifying agent, and oscillating for 22min at a high pressure to obtain the high-performance electret master batch, wherein the pressure in the high-pressure oscillation is 1.8MPa, and the oscillation frequency is 320 Hz;
the manufacturer of the liquid cationic etherifying agent is Zibo Oalt chemical Co., Ltd, and the content is 69%;
the nanometer master batch comprises the following components: methyl methacrylate: the mass ratio of the cationic etherifying agent is 1:9-11: 1.
The melt extrusion is carried out, wherein polypropylene slices with the melt index of 37g/10min and the high-performance electret master batches are conveyed into a screw extruder through a material suction pipeline, and are uniformly mixed and subjected to melt extrusion; the screw temperature of the screw extruder is 259 ℃, and the box body temperature is 235 ℃;
the mass ratio of the polypropylene chips with the melt index of 35-40g/10min to the high-performance electret master batches is 95: 5.
And cooling the fibers by adopting a cold air cooling mode, wherein the cold air is controlled at 1100r/min, and the fibers are cooled to 22 ℃.
And (3) drafting and lapping, namely drafting the cooled fiber by hot air to form 15-micron spunbonded fiber, then drafting and lapping the fiber, and obtaining the spunbonded non-woven fabric after hot rolling reinforcement, wherein the temperature of a roller in the hot rolling process is 100 ℃, and the pressure of a rolling mill is 42 bar.
The preparation of the high-quality electric cotton comprises the step of carrying out needling and opening on the spunbonded fabric on needling equipment to obtain a fluffy fabric structure, so that the high-quality electric cotton has an excellent dust holding effect.
And (3) adding static electricity, namely passing the spun-bonded non-woven fabric through an electrostatic field formed by an electrostatic generator to obtain the excellent electric cotton non-woven fabric material, wherein the voltage of the electrostatic generator is 60V, and the current of the electrostatic generator is 12 mA.
Example 3
A preparation method of a high-quality electric cotton non-woven fabric material comprises premixing, preparation of high-performance electret master batches, melt extrusion, fiber cooling, fiber mixing, drafting and lapping, needle punching and opening and electrostatic addition.
The preparation method comprises the following steps of premixing, namely blending 80 parts by weight of polypropylene slices with a melt index of 40g/10min, 20 parts by weight of polyester slices, 7 parts by weight of modified tourmaline powder, 4 parts by weight of coconut shell activated carbon, 3 parts by weight of nano titanium dioxide and 2 parts by weight of nano calcium oxide in a mixer to obtain a mixture, wherein the rotating speed of the mixer is 550rpm, and the mixing time is 20 min; then kneading and extruding the mixture in a double-screw extruder, and cooling and shaping in a cold water tank at 5 ℃, wherein the diameter of a screw of the double-screw extruder is 55mm, the length-diameter ratio is 25, the temperature of a machine head is 310 ℃, and the rotating speed of the screw of the double-screw extruder is 210 rpm; and after cooling and shaping, granulating by using a granulator to obtain the nano master batch with the particle size of 400 nm.
The particle size of the nano titanium dioxide is 350 nm.
The particle size of the nano calcium oxide is 250 nm.
The preparation method of the modified tourmaline powder comprises the steps of adding 1kg of tourmaline powder with the mesh number of 50 meshes into 10kg of sodium hydroxide solution with the mass percent of 8-10%, heating to 45 ℃, stirring for 1h, wherein the stirring time is 450rpm, filtering the alkalized tourmaline powder, drying at 125 ℃, calcining at 750 ℃ after drying is finished, and calcining for 3h to obtain the modified tourmaline powder.
Preparing the high-performance electret master batch, namely adding the nano master batch into mixed liquid of methyl methacrylate and a liquid cationic etherifying agent, and performing high-pressure oscillation for 25min to obtain the high-performance electret master batch, wherein the pressure in the high-pressure oscillation is 1.9MPa, and the oscillation frequency is 350 Hz;
the manufacturer of the liquid cationic etherifying agent is Zibo Oalt chemical Co., Ltd, and the content is 69%;
the nanometer master batch comprises the following components: methyl methacrylate: the mass ratio of the cationic etherifying agent is 1: 11: 1.
The melt extrusion is carried out, wherein polypropylene slices with the melt index of 40g/10min and the high-performance electret master batches are conveyed into a screw extruder through a material suction pipeline, and are uniformly mixed and subjected to melt extrusion; the screw temperature of the screw extruder is 260 ℃, and the box body temperature is 240 ℃;
the mass ratio of the polypropylene slices with the melt index of 40g/10min to the high-performance electret master batch is 95: 5.
And cooling the fibers by adopting a cold air cooling mode, wherein the cold air is controlled at 1200r/min, and the fibers are cooled to 25 ℃.
And (3) drafting and lapping, namely drafting the cooled fiber by hot air to form 20-micron spunbonded fiber, then drafting and lapping the fiber, and carrying out hot rolling reinforcement to obtain the spunbonded non-woven fabric, wherein the roll temperature in the hot rolling process is 120 ℃, and the pressure of a rolling mill is 45 bar.
The preparation of the high-quality electric cotton comprises the step of carrying out needling and opening on the spunbonded fabric on needling equipment to obtain a fluffy fabric structure, so that the high-quality electric cotton has an excellent dust holding effect.
And the static electricity is added, the spun-bonded non-woven fabric passes through an electrostatic field formed by an electrostatic generator, so that the high-quality cotton non-woven fabric material is obtained, wherein the voltage of the electrostatic generator is 60V, and the current is 15 mA.
Example 4:
the high-quality electric cotton non-woven fabric materials described in examples 1 to 3 were used, and comparative tests 1 to 2 were set up for comparison:
comparative example 1: the preparation method of the excellent electric cotton non-woven fabric material described in the embodiment 1 is adopted, and the difference is that: no nano calcium oxide is added in the premixing.
Comparative example 2: the preparation method of the excellent electric cotton non-woven fabric material described in the embodiment 1 is adopted, and the difference is that: tourmaline powder of 50 mesh was used in the premixing instead of the modified tourmaline powder.
The properties of the excellent electric cotton non-woven fabric materials prepared in the examples 1 to 3 and the comparative examples 1 to 2 after the test are as follows:
all percentages used in the present invention are mass percentages unless otherwise indicated.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A preparation method of a high-quality electric cotton non-woven fabric material is characterized by comprising the steps of premixing, preparation of high-performance electret master batches, melt extrusion, fiber cooling, fiber mixing, drafting and lapping, needle opening and static adding;
premixing, namely blending polypropylene slices, polyester slices, modified tourmaline powder, coconut shell activated carbon, nano titanium dioxide and nano calcium oxide in a mixer to obtain a mixture, kneading and extruding the mixture in a double-screw extruder, cooling and shaping, and granulating by using a granulator after cooling and shaping are finished to obtain nano master batches;
the excellent electric cotton non-woven fabric material comprises the following raw materials in parts by weight: 70-80 parts by weight of polypropylene slices with the melt index of 35-40g/10min, 15-20 parts by weight of polyester slices, 5-7 parts by weight of modified tourmaline powder, 3-4 parts by weight of coconut shell activated carbon, 2-3 parts by weight of nano titanium dioxide and 1-2 parts by weight of nano calcium oxide;
the rotating speed of the mixer is 500-550rpm, the mixing time is 15-20min, the diameter of a screw of the double-screw extruder is 50-55mm, the length-diameter ratio is 20-25, the head temperature is 300-310 ℃, and the rotating speed of the screw of the double-screw extruder is 200-210 rpm;
according to the preparation method of the modified tourmaline powder, the tourmaline powder is added into a sodium hydroxide solution, the mixture is heated and stirred for 1 hour, then the alkalized tourmaline powder is filtered and dried, and after drying is finished, the modified tourmaline powder is calcined to obtain the modified tourmaline powder;
preparing the high-performance electret master batch, namely adding the nano master batch into mixed liquid of methyl methacrylate and a liquid cationic etherifying agent, and performing high-pressure oscillation to obtain the high-performance electret master batch;
the nanometer master batch comprises the following components: methyl methacrylate: the mass ratio of the cationic etherifying agent is 1:9-11: 1;
and in the melt extrusion, polypropylene slices with the melt index of 35-40g/10min and the high-performance electret master batches are conveyed into a screw extruder through a material suction pipeline, are uniformly mixed and are subjected to melt extrusion.
2. The method for preparing the excellent electric cotton non-woven fabric material according to claim 1, wherein the mass ratio of the polypropylene chips with the melt index of 35-40g/10min to the high-performance electret master batch is 95: 5.
3. The method for preparing a Youen cotton non-woven fabric material according to claim 1, wherein the fiber is cooled by means of cold air cooling, the cold air is controlled at 1000-1200r/min, and the fiber is cooled to 20-25 ℃.
4. The method for preparing the high-quality cotton non-woven fabric material according to claim 1, wherein the static electricity is added, the spun-bonded non-woven fabric is subjected to an electrostatic field formed by an electrostatic generator, so as to obtain the high-quality cotton non-woven fabric material, the voltage of the electrostatic generator is 60V, and the current is 10-15 mA.
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| CN115262092A (en) * | 2022-07-27 | 2022-11-01 | 上海精发实业股份有限公司 | Orange petal cleavage type double-component filament needle-punched electrostatic cotton and preparation method thereof |
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