CN111359316B - Polyolefin spunbonded filament electrostatic framework filtering material with antibacterial and mildew-proof functions and preparation method and application thereof - Google Patents
Polyolefin spunbonded filament electrostatic framework filtering material with antibacterial and mildew-proof functions and preparation method and application thereof Download PDFInfo
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- CN111359316B CN111359316B CN201811594395.7A CN201811594395A CN111359316B CN 111359316 B CN111359316 B CN 111359316B CN 201811594395 A CN201811594395 A CN 201811594395A CN 111359316 B CN111359316 B CN 111359316B
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- 238000001914 filtration Methods 0.000 title claims abstract description 84
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 83
- 239000000463 material Substances 0.000 title claims abstract description 78
- 229920000098 polyolefin Polymers 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000002131 composite material Substances 0.000 claims abstract description 32
- 230000005611 electricity Effects 0.000 claims abstract description 30
- 230000000694 effects Effects 0.000 claims abstract description 29
- 238000003860 storage Methods 0.000 claims abstract description 28
- -1 polyethylene Polymers 0.000 claims abstract description 22
- 239000004698 Polyethylene Substances 0.000 claims abstract description 16
- 239000004743 Polypropylene Substances 0.000 claims abstract description 16
- 229920000573 polyethylene Polymers 0.000 claims abstract description 11
- 229920001155 polypropylene Polymers 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000002074 melt spinning Methods 0.000 claims abstract description 3
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 26
- 239000000155 melt Substances 0.000 claims description 20
- 238000009987 spinning Methods 0.000 claims description 13
- 150000001412 amines Chemical class 0.000 claims description 10
- 239000004611 light stabiliser Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 230000000843 anti-fungal effect Effects 0.000 claims description 3
- 229940121375 antifungal agent Drugs 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000005684 electric field Effects 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 6
- 230000002265 prevention Effects 0.000 abstract description 4
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- 239000004594 Masterbatch (MB) Substances 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000000443 aerosol Substances 0.000 description 3
- 238000004887 air purification Methods 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
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- 239000002356 single layer Substances 0.000 description 3
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- 102000004190 Enzymes Human genes 0.000 description 2
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- 239000012943 hotmelt Substances 0.000 description 2
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- 239000000178 monomer Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
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- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
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- 238000002845 discoloration Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
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- 229910052709 silver Inorganic materials 0.000 description 1
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- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0032—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions using electrostatic forces to remove particles, e.g. electret filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0001—Making filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
Abstract
The invention provides a polyolefin spunbonded filament electrostatic framework filter material with antibacterial and mildewproof functions, a preparation method and application thereof, wherein the preparation method comprises the following steps: 1) melt spinning: a component A and a component B are spun and melted to form a continuous bicomponent composite filament with a sheath-core structure; the component A comprises polyethylene and a functional medium with an electricity storage function, and the component B comprises polypropylene and a functional medium with an antibacterial and mildewproof function; or the component A comprises polyethylene and a functional medium with antibacterial and mildewproof effects, and the component B comprises polypropylene and a functional medium with electricity storage effect; 2) forming a net: the skin-core structure continuous bicomponent composite filament is subjected to filament separation to form a net; 3) reinforcing and forming: adopting hot air to melt, bond and solidify to form a bi-component spun-bonded material; 4) high-voltage electrostatic treatment: the bicomponent spunbond material was charged electrically. The electrostatic filtering material has the effects of filtering particles, electrostatic adsorption, broad-spectrum antibiosis and mildew prevention.
Description
Technical Field
The invention relates to a non-woven material, in particular to a polyolefin spunbonded filament electrostatic framework filter material with antibacterial and mildewproof functions, and a preparation method and application thereof.
Background
People advocate the concept of environmental protection globally, environmental governance has become a national policy and a national will, people pay more attention to air pollution governance, and people must have the benefit of clean air in pursuing the vision of beautiful life. The air inside the large public building, the automobile compartment and the household residence are taken as three main places for human activities, and the air is indispensably filtered and purified. In recent years, the air filter/air filter manufacturing industry can also cling to the living demands of people, and a corresponding fresh air system, a vehicle-mounted air conditioning system and a household purifier are provided. These air purification/filtration systems all need to match the filter core that the filter media processed becomes, and the filter media just should rise the ship height, the market demand is permanent for a long time. With the advanced development of air pollution treatment, the treatment of particulate pollutants such as PM2.5 and the like and gaseous pollutants such as VOC and the like is improved year by year, but the filter element serving as a filter medium is easy to breed microorganisms such as bacteria, fungi and the like, and poses serious safety threat to human bodies. The acid odor of the active carbon filter element of the automobile air conditioner and the active carbon filter element of the household purifier exists all the time, the recent analysis is the odor released after the spoilage of microorganisms on the active carbon powder/particles, which is a common example that microorganisms threaten the personal safety.
At present, a small amount of antibacterial framework materials for inhibiting and killing microbial pollutants exist in the market, and most of the antibacterial framework materials are subjected to subsequent impregnation antibacterial liquid treatment and short fiber antibacterial framework materials (including dry-method framework materials and wet-method framework materials) blended by adding a certain proportion of antibacterial short fiber fibers, and the two materials have relatively complete manufacturing technologies, but still have the following obvious defects:
1. the framework material treated by the dipping antibacterial liquid has potential safety hazard and poor discoloration resistance after the cloth surface is contacted by a human body, dyeing treatment needs to be added along with the problem of obvious color difference of the cloth surface during the treatment of dipping mother liquid, the working procedure and the cost are increased, the antibacterial agent ingredient wrapped on the surface layer of the framework material treated by the dipping antibacterial liquid is easy to dissolve out, the effective service life is short, the water resistance is poor, and more importantly, the process is not green.
2. The short fiber antibacterial framework material has small rebound deformation after post pleating, which is not beneficial to the disassembly and assembly of the filter element, the component fibers of the short fiber antibacterial framework material are disorderly arranged and oriented, the appearance and color of the formed short fiber antibacterial framework material are darker, and the fabric style and aesthetic feeling are poorer;
3. the short-fiber antibacterial framework material is added with low-melting-point ES fibers for hot-melt adhesion, so that the short-fiber antibacterial framework material is easy to deform at high temperature and is not beneficial to subsequent laminating and folding processing;
4. the antibacterial short fiber, the antibacterial agent, the ES fiber and the like are added into the short fiber antibacterial framework material, so that the working procedure is elongated, the process is complicated to realize, the productivity is low, and the production cost is high;
5. at present, a filter material product integrating the multifunctional advantages of antibiosis, mould prevention, electrostatic adsorption, high rigidity, direct folding and the like is not available in the industry.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention aims to provide a polyolefin spunbonded filament electrostatic skeleton filter material with antibacterial and antifungal functions, and a preparation method and a use thereof, which are used to solve the problems of the existing filter composite materials in the market or the existing prior art, and also fill up the blank of the related products and technologies of the integration of the antibacterial and antifungal functions and the electrostatic filter function in the current air filtration field.
To achieve the above objects and other related objects, the present invention is achieved by the following technical solutions.
The invention provides a preparation method of a polyolefin spunbonded filament electrostatic framework filter material with antibacterial and mildewproof functions, which comprises the following steps:
1) melt spinning: a component A and a component B are spun and melted to form a continuous bicomponent composite filament with a sheath-core structure; the component A comprises polyethylene and a functional medium with an electricity storage function, and the component B comprises polypropylene and a functional medium with an antibacterial and mildewproof function; or the component A comprises polyethylene and a functional medium with antibacterial and mildewproof effects, and the component B comprises polypropylene and a functional medium with electricity storage effect;
2) forming a net: the skin-core structure continuous bicomponent composite filament is subjected to filament separation to form a net;
3) reinforcing and forming: adopting hot air to melt, bond and solidify to form a bi-component spun-bonded material;
4) high-voltage electrostatic treatment: the bicomponent spunbond material was charged electrically.
Alternatively, in the present application, the higher melting B component forms the core layer and the lower melting A component forms the skin layer.
Preferably, the sheath-core structure of the continuous bicomponent composite filament of the sheath-core structure of the present application is a concentric structure.
Preferably, the mass ratio of the component A to the component B is 3: 7-5: 5.
Preferably, in the step 1), the fineness of the sheath-core structure continuous bicomponent composite filament is 1.5 to 15 deniers.
Preferably, the functional medium with the electricity storage function comprises the following raw material components in parts by weight:
the functional medium with the electricity storage function is obtained by blending and granulating the raw material components.
Preferably, the polyolefin chip is 80 to 90 parts by weight.
Preferably, the polyolefin chip is polyethylene or polypropylene.
Preferably, the melt index of the polyolefin chips is (12-40) g/10 min.
Preferably, the hindered amine light stabilizer 944 of said hindered amine light stabilizer.
Optionally, the addition amount of the functional medium with the electricity storage function is 0.5-4 wt% of the total mass of the component A or the component B.
The functional medium with the electricity storage function mainly adopts polyolefin with strong electronegativity as a matrix, adds a nonpolar material with prominent dielectric property to capture charges, simultaneously uses active components to improve the overall electricity capturing activity, increases the crystallinity of fibers through a nucleating agent component under the regulation of a stabilizing agent, and increases the attachment fastness of the charges through a heat-resistant stabilizing component zinc stearate, thereby achieving more and more stable storage of captured charge quantity.
More preferably, the functional medium with the antibacterial and mildewproof effects comprises the following raw material components in parts by weight:
the functional medium with the antibacterial and mildewproof effects is obtained by blending and granulating the raw material components.
The medium with the antibacterial and mildewproof functions mainly releases silver ions into bacteria to react and combine with cellular enzymes of the bacteria, inhibits the activity of the cellular enzymes and the reproduction and regeneration of the bacteria, and achieves the effects of killing the bacteria and preventing mildew.
Preferably, the addition amount of the functional medium with the antibacterial and mildewproof effects is 3-6 wt% of the total mass of the component A or the component B.
Preferably, the component A and the component B are respectively melted and extruded by a screw extruder and then enter a composite spinning manifold, and then are precisely distributed by a melt runner and spun by a spinning component system to form the sheath-core structure continuous bicomponent composite filament.
More preferably, the temperature for melt extrusion of the component A through a screw extruder is 210-240 ℃.
More preferably, the melt formed after melt extrusion of the a-component is filtered through a filter. More preferably, the pressure before filtration is 4-12 MPa, and the pressure after filtration is 6-10 MPa.
More preferably, in step 1), the melt of the A-component after filtration is metered by means of a metering pump. More preferably, the rotating speed of the metering pump is 8-25 rpm.
More preferably, the temperature at which the B component is melt-extruded through the screw extruder is set to 240 ℃ to 295 ℃.
More preferably, the melt formed after melt extrusion of the B component is filtered through a filter. More preferably, the pressure before filtration is 4-12 MPa; the pressure after filtration is 6-10 MPa. More preferably, the pressure of a melt formed after the component B is melt extruded is increased to 5-12 MPa by a pump. More preferably, in step 1), the melt of the polyolefin polymer of component B after filtration is metered by means of a metering pump. More preferably, the rotating speed of the metering pump is 8-25 rpm.
Preferably, in the composite spinning beam, the temperature of the composite spinning beam is 220-265 ℃.
More preferably, the formed sheath-core structured continuous bicomponent composite filament is further subjected to post-treatment including suction purification, cold air cooling and drawing. Preferably, monomer suction purification systems are arranged on two sides below a spinneret plate of the composite spinning manifold, and suction air quantity on two sides is 650-1000 rpm. More preferably, the air temperature in the cold air cooling is 10-30 ℃; the relative humidity is 55-80%, and the air volume is 900-1350 rpm. Preferably, the drawing is performed by a positive pressure air stream drawing system. More preferably, the draft wind pressure is 0.08 to 0.35 MPa.
Preferably, in the step 2), the silk is divided and guided through a silk divider. And (4) adopting a web former to form a web. More preferably, the web forming speed is 5-50 m/min.
Preferably, in step 3), the bicomponent composite filament fiber web is conveyed to a cylinder oven or a flat-screen oven through a net curtain, high-temperature hot air penetrates through the fiber web, so that the skin layer low-melting-point component material is molten, the core layer high-melting-point component material is not molten, the bicomponent filament fiber web is subjected to fusion bonding, and finally, the bicomponent composite filament fiber web is subjected to soft rolling forming through a pair of smooth metal circular rollers. Wherein the hot air temperature is 90-180 ℃, the vehicle speed is 5-50 m/min, the surface temperature of the metal roller is 50-100 ℃, and the pressure between rollers is 1-7 MPa.
Preferably, in the step 4), the double-component spun-bonded material is subjected to corona charging by using high-voltage static electricity as an alternating direct-current electric field, and the front side and the back side of the material are charged, wherein the charging voltage is 10 KV-120 KV. Preferably, the metal needle or wire releasing the electric charge is at a perpendicular distance of 2cm to 15cm from the material. Preferably, the charging time is 2s to 20 s.
The invention also discloses a polyolefin spunbonded filament electrostatic framework filter material with the antibacterial and mildewproof functions, which is prepared by the method.
Preferably, the gram weight of the polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildewproof functions is 70-200 g/m2。
Preferably, the polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildewproof functions has the width of 1.6-3.2 m.
The invention also discloses the application of the polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildewproof functions in the field of air filtration.
The polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildew-proof functions is a single-layer medium-efficiency and high-efficiency filter material, but can achieve the same filtering efficiency of a composite filter material, has multiple effects of physical separation, antibacterial and mildew prevention and electrostatic adsorption, has excellent self-reinforcing performance, can be directly subjected to folding processing, has extremely low filtering resistance and high air permeability, can completely replace a corresponding medium-efficiency and high-efficiency filtering composite filter material product in the current market, particularly has the antibacterial and mildew-proof functions, can meet the GB/T21551 standard, and is mainly applied to the fields of automobile air conditioner filtration, fresh air system filtration, dust collector filtration, household air purifiers and the like.
Compared with the prior art, the invention has the following advantages:
1. according to the polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildew-proof functions, the thermal properties of the component polymers are optimized and matched, the composite spinning web formation and hot-melt bonding reinforcement forming processes of the polymers with different melting properties are utilized, and finally, the electret filter product is obtained after high-voltage electrostatic treatment, so that high mechanical strength and high stiffness are achieved, the electrostatic electret filter materials with different filament diameters can be manufactured according to specific fresh air purification environmental conditions in actual production, the whole process flow is integrated one-step online direct web formation and corona charging, the manufacturing process is greatly simplified compared with that of an offline composite filter material with the same filtering grade, the production process is green and environment-friendly, the operation is easy, and the product performance is stable and reliable.
2. The polyolefin spunbonded filament electrostatic framework filter material with the antibacterial and mildew-proof functions is used as a single-layer filter material, can replace a conventional melt-blown and framework composite filter material in the fields of automobile-mounted air conditioners, fresh air systems, air purifiers and the like by virtue of excellent self-reinforcing characteristics, can also be directly folded to manufacture a filter element, greatly reduces the manufacturing cost, has high cost performance, thoroughly eliminates glue components with potential safety hazards, and realizes a real 100% glue-free filter material.
3. The polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildew-proof functions has the advantages that the fabric appearance style is different from the style of a staple fiber skeleton and a melt-blown filter product which are common in the current market, the fabric is distinguished, the filter material has unique filament aesthetic feeling, has multiple effects of antibacterial, mildew-proof, electrostatic adsorption filtration and the like, and is the only type in the current market.
4. The invention adopts the process technology of hot air penetration fusion bonding reinforcement and the corona double-side charging technology, the sheath-core structure continuous type bi-component composite filaments can be effectively solidified by depending on fusion points or fusion surfaces, the fluffiness of the filter non-woven fabric medium is ensured, the strength of the material is also considered, and the material has the double filtering functions of physical barrier and electrostatic adsorption after high-voltage corona charging, more remarkably, the final product has extremely low filtering resistance and high air permeability, and the energy-saving and consumption-reducing effects on the terminal application of the product are obvious.
The polyolefin spunbonded filament electrostatic framework filter material with the antibacterial and mildewproof functions has the outstanding advantages that the antibacterial and mildewproof functions and the electrostatic filtering function are combined into a whole, particularly, the antibacterial and mildewproof performance can meet the GB/T21551 standard, the product fills the technical blank in the field of domestic air purification, and the industrial progress is powerfully promoted.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Before the present embodiments are further described, it is to be understood that the scope of the invention is not limited to the particular embodiments described below; it is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.
When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any value therebetween can be selected unless the invention otherwise indicated. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition to the specific methods, devices, and materials used in the examples, any methods, devices, and materials similar or equivalent to those described in the examples may be used in the practice of the invention in addition to the specific methods, devices, and materials used in the examples, in keeping with the knowledge of one skilled in the art and with the description of the invention.
Example 1
The component A adopts PE master batches, the melting point is 130-135 ℃, and meanwhile, a functional medium with an electricity storage function accounting for 0.8 wt% of the total mass of the component A is mixed into the PE master batches of the component A; and the component B adopts PP master batches, the melting point is 162-165 ℃, and meanwhile, a functional medium with antibacterial and mildewproof effects accounting for 5 wt% of the total mass of the component B is mixed into the PP master batches of the component B. The mass ratio of the component A to the component B is 30%: 70 percent.
The functional medium with the electricity storage function in the embodiment comprises the following raw material components in parts by weight:
the functional medium with the electricity storage function is obtained by blending and granulating the raw material components.
The polyolefin slice is polyethylene.
The polyethylene chips had a melt index of 20g/10 min.
A hindered amine light stabilizer 944 of said hindered amine light stabilizer.
The functional medium with the antibacterial and mildewproof effects in the embodiment comprises the following raw material components in parts by weight:
the functional medium with the antibacterial and mildewproof effects is obtained by blending and granulating the raw material components.
The polyolefin slice is polypropylene.
The melt index of the polypropylene chips was 45g/10 min.
The polymers used in the present application are all olefin polymers, and no moisture removal treatment is required. And respectively carrying out melt extrusion on the component A and the component B through respective screw extruders.
The component A is melted by a single screw extruder, and the temperature zone is set as follows: the melt of the component A is filtered by a filter at the temperature of 210 ℃, 220 ℃, 235 ℃, 230 ℃ and the melt temperature of 229 ℃, the pressure before filtering is 5.45MPa, and the pressure after filtering is 6.5MPa, then the melt enters a metering pump for metering, the rotating speed of the metering pump is 12rpm, and the quantitative melt enters a composite spinning box body.
The component B is melted by a double-screw extruder, and the temperature zone is set as follows: 240 ℃, 250 ℃, 270 ℃, 275 ℃, 270 ℃, 275.5 ℃ of melt, boosting the pressure of the melt of the component B by a booster pump, then feeding the melt into a filter for filtering, wherein the pressure before filtering is 10.0MPa, and the pressure after filtering is 6.5MPa, then feeding the melt into a metering pump for metering, the rotating speed of the metering pump is 18rpm, and feeding the quantitative melt into a composite spinning box body.
The temperature of a melt distribution closed space of the composite spinning manifold is kept at 245 ℃; the suction air volume of the monomer is 750 rpm; the temperature of cold air blown oppositely at two sides is 12 ℃, the relative humidity is 60 percent, and the air quantity is 950 rpm; the airflow drafting wind pressure is 0.18 MPa; the net forming speed is 15.5 m/min; the air suction rate of the net former is 1250rpm, and the auxiliary air suction rate is 1050 rpm; temperature of cylinder hot air ovenSetting the temperature to be 134.5 ℃; the temperature of the metal round rollers after the cloth is discharged by the round screen hot air equipment is 80 ℃, and the pressure between the round rollers is 1.5 MPa; the corona charging voltage of the material is 50KV, the vertical distance between the metal wire releasing charges and the material is 5cm, and the charging time is 3.50 s; the non-woven fabric after high-voltage electrostatic treatment is wound into a roll by a winding machine, and the final roll is cut by a splitting machine to obtain a product with the gram weight of 110g/m2。
The electrostatic skeleton filter material obtained by testing the comprehensive performance test platform of the TSI8130A filter material is tested under the following test conditions: the flow rate is 32L/min, the median diameter of sodium chloride aerosol is 0.3 micron, the filtration efficiency is 46 percent, and the filtration resistance is 2.3 Pa; actually measuring the fiber fineness of 8D; when the fiber fineness was adjusted to 1.5D, the filtration efficiency was measured to be 88% and the filtration resistance was measured to be 7 Pa. The measured antibacterial and mildewproof performance meets the GB/T21551 standard.
Comparative examples 1 to 1
In the implementation process of the comparative example, the component A is not added with the functional medium with the electricity storage function, and other manufacturing factors, such as the specification and model of raw materials, the formula, the production and manufacturing process and the test conditions of the product, are the same as those of the component A in the embodiment 1. The gram weight is 110g/m2The actually measured filtration efficiency is 2.97%, and the filtration resistance is 2.3 Pa; actually measuring the fiber fineness of 8D; when the fiber fineness was adjusted to 1.5D, the filtration efficiency was measured to be 12.8% and the filtration resistance was measured to be 7 Pa. The measured antibacterial and mildewproof performance meets the GB/T21551 standard.
Comparative examples 1 to 2
In the implementation process of the comparative example, the component B is not added with a medium with antibacterial and mildewproof functions, and other manufacturing factors, such as the specification and model of raw materials, the formula, the production and manufacturing process and the test conditions of the product, are the same as those in the example 1. The gram weight is 110g/m2The filtration efficiency is 46 percent, and the filtration resistance is 2.3 Pa; actually measuring the fiber fineness of 8D; when the fiber fineness was adjusted to 1.5D, the filtration efficiency was measured to be 88% and the filtration resistance was measured to be 7 Pa. The product has no obvious antibacterial and mildewproof performance and does not meet the GB/T21551 standard.
Comparative examples 1 to 3
In the implementation process of the comparative example, a functional medium with an electricity storage function is not added in the component A; medium with antibacterial and mildewproof functions is not added in the component BThe other manufacturing factors, such as the raw material specification, the formula, the manufacturing process and the product testing conditions, are the same as those in example 1. The gram weight is 110g/m2The actually measured filtration efficiency is 2.97%, and the filtration resistance is 2.3 Pa; actually measuring the fiber fineness of 8D; when the fiber fineness was adjusted to 1.5D, the filtration efficiency was measured to be 12.8% and the filtration resistance was measured to be 7 Pa. The product has no obvious antibacterial and mildewproof performance and does not meet the GB/T21551 standard.
Example 2
The polymer in the component A is PE master batch, the melting point is 130-135 ℃, and meanwhile, functional medium with the electricity storage function accounting for 1.5 wt% of the total mass of the component A is mixed into the PE master batch of the component A; the component B polymer is PP master batch, the melting point is 162-165 ℃, and meanwhile, a functional medium with antibacterial and mildewproof effects accounting for 5 wt% of the total mass of the component B is mixed into the PP master batch of the component B.
The functional medium with the electricity storage function in the embodiment comprises the following raw material components in parts by weight:
the functional medium with the electricity storage function is obtained by blending and granulating the raw material components.
The polyolefin slice is polyethylene.
The melt index of the polyethylene chips was 25g/10 min.
A hindered amine light stabilizer 944 of said hindered amine light stabilizer.
The functional medium with the antibacterial and mildewproof effects in the embodiment comprises the following raw material components in parts by weight:
the functional medium with the antibacterial and mildewproof effects is obtained by blending and granulating the raw material components.
The mass ratio of the component A to the component B is 50%: 50 percent. The rotating speeds of metering pumps of the component A and the component B are both 15rpm, and the web forming speed is 12.5 m/min. Other manufacturing factors, such as the type of raw material specification, formulation, manufacturing process and test conditions of the product, were the same as in example 1.
The gram weight is 110 g/square meter specification, the static skeleton filter material obtained by adopting TSI8130A filter material comprehensive performance test platform test, the test condition is as follows: the flow rate is 32L/min, the median diameter of sodium chloride aerosol is 0.3 micron, the filtration efficiency is 54 percent, and the filtration resistance is 2.4 Pa; actually measuring the fiber fineness to be 8.5D; when the fiber fineness was adjusted to 1.8D, the filtration efficiency was measured to be 86% and the filtration resistance 6Pa was measured. The antibacterial and mildewproof performance is measured to meet the GB/T21551 standard.
Comparative example 2-1
In the implementation process of the comparative example, the component A is not added with the functional medium with the electricity storage function, and other manufacturing factors, such as the specification and model of raw materials, the formula, the production and manufacturing process and the test conditions of the product, are the same as those of the component A in the example 2. The gram weight is 110 g/square meter, the actually measured filtration efficiency is 2.82 percent, and the filtration resistance is 2.3 Pa; actually measuring the fiber fineness to be 9.1D; when the fiber fineness was adjusted to 1.7D, the filtration efficiency was measured to be 17% and the filtration resistance 6.5 Pa. The antibacterial and mildewproof performance is measured to meet the GB/T21551 standard.
Comparative examples 2 to 2
In the implementation process of the comparative example, the component B is not added with a medium with antibacterial and mildewproof functions, and other manufacturing factors, such as the specification and model of raw materials, the formula, the production and manufacturing process and the test conditions of the product, are the same as those in the example 2. The gram weight is 110 g/square meter, the actually measured filtration efficiency is 52 percent, and the filtration resistance is 2.3 Pa; actually measuring the fiber fineness to be 8.7D; when the fiber fineness was adjusted to 1.7D, the filtration efficiency was measured to be 87% and the filtration resistance 6.5 Pa. The antibacterial and mildewproof performance is not obviously measured and does not meet the GB/T21551 standard.
Comparative examples 2 to 3
In the implementation process of the comparative example, a functional medium with an electricity storage function is not added in the component A, and a medium with an antibacterial and mildewproof function is not added in the component B; other manufacturing factors, such as the raw material specification, formulation, manufacturing process and product testing conditions were the same as in example 2. The gram weight is 110 g/square meter, the actually measured filtration efficiency is 3.12 percent, and the filtration resistance is 2.3 Pa; actually measuring the fiber fineness to be 9.0D; when the fiber fineness was adjusted to 1.7D, the filtration efficiency was measured to be 17.8% and the filtration resistance 6.5 Pa. The antibacterial and mildewproof performance is not obviously measured and does not meet the GB/T21551 standard.
Example 3
The component A adopts PE master batches, the melting point is 120-132 ℃, and meanwhile, a functional medium with antibacterial and mildewproof effects accounting for 5 wt% of the total mass of the component A is mixed into the component A; and the polyolefin in the component B is PP master batch, and a functional medium with an electricity storage function accounting for 1.2 wt% of the total mass of the component B is mixed into the PP master batch of the component B, and the melting point is 162-165 ℃.
The functional medium with the electricity storage function in the embodiment comprises the following raw material components in parts by weight:
the functional medium with the electricity storage function is obtained by blending and granulating the raw material components.
The polyolefin slice is polypropylene.
The melt index of the polyolefin pellets was 15g/10 min.
A hindered amine light stabilizer 944 of said hindered amine light stabilizer.
The functional medium with the antibacterial and mildewproof effects in the embodiment comprises the following raw material components in parts by weight:
the functional medium with the antibacterial and mildewproof effects is obtained by blending and granulating the raw material components.
The mass ratio of the component A to the component B is 40%: 60 percent. In the production and manufacturing process, the rotating speed of the A component metering pump is 12rpm, the rotating speed of the B component metering pump is 18rpm, the net forming speed is 13.5m/min, and the temperature of the hot air oven is 131.5 ℃. Other manufacturing factors, such as the type of raw material specification, formulation, manufacturing process and test conditions of the product, were the same as in example 1.
The electrostatic framework filter material obtained by testing the specification product with the weight of 110g by adopting a TSI8130A filter material comprehensive performance test platform has the following test conditions: the flow rate is 32L/min, the median diameter of sodium chloride aerosol is 0.3 micron, the filtration efficiency is 50 percent, and the filtration resistance is 2.5 Pa; actually measuring the fiber fineness to be 7.9D; when the fiber fineness was adjusted to 2.0D, the filtration efficiency was measured to be 85% and the filtration resistance 6 Pa. The antibacterial and mildewproof performance is measured to meet the GB/T21551 standard.
Comparative example 3-1
In the implementation process of the comparative example, the component A is not added with a medium with the antibacterial and mildewproof functions, and other manufacturing factors, such as the specification and model of raw materials, the formula, the production and manufacturing process and the test conditions of the product, are the same as those in the example 3. The gram weight is 110 g/square meter, the actually measured filtration efficiency is 51 percent, and the filtration resistance is 2.5 Pa; actually measuring the fiber fineness to be 8.1D; when the fiber fineness was adjusted to 2.0D, the filtration efficiency was measured to be 85% and the filtration resistance 6 Pa. The antibacterial and mildewproof performance is not obviously measured and does not meet the GB/T21551 standard.
Comparative examples 3 to 2
In the implementation process of the comparative example, the component B is not added with the functional medium with the electricity storage function, and other manufacturing factors, such as the specification and model of raw materials, the formula, the production and manufacturing process and the test conditions of the product, are the same as those in the example 3. The gram weight is 110 g/square meter, the actually measured filtration efficiency is 3.42 percent, and the filtration resistance is 2.3 Pa; actually measuring the fiber fineness to be 8.4D; when the fiber fineness was adjusted to 2.0D, the filtration efficiency was measured to be 15% and the filtration resistance 6Pa was measured. The antibacterial and mildewproof performance is measured to meet the GB/T21551 standard.
Comparative examples 3 to 3
In the implementation process of the comparative example, a medium with an antibacterial and mildewproof function is not added in the component A, and a functional medium with an electricity storage function is not added in the component B. Other manufacturing factors, such as the raw material specification, formulation, manufacturing process and product testing conditions, were the same as in example 3. The gram weight is 110 g/square meter, the actually measured filtration efficiency is 4.02 percent, and the filtration resistance is 2.4 Pa; when the fiber fineness was adjusted to 2.0D, the filtration efficiency was measured to be 16% and the filtration resistance 6 Pa. The antibacterial and mildewproof performance is not obviously measured and does not meet the GB/T21551 standard.
The polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildew-proof functions is a single-layer medium-efficiency and high-efficiency filter material, but can achieve the same filtering efficiency of a composite filter material, has multiple effects of physical separation, antibacterial and mildew prevention and electrostatic adsorption, has excellent self-reinforcing performance, can be directly subjected to folding processing, has extremely low filtering resistance and high air permeability, can completely replace a corresponding medium-efficiency and high-efficiency filtering composite filter material product in the current market, particularly has the antibacterial and mildew-proof functions, can meet the GB/T21551 standard, and is mainly applied to the fields of automobile air conditioner filtration, fresh air system filtration, dust collector filtration, household air purifiers and the like.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A preparation method of a polyolefin spunbonded filament electrostatic framework filter material with antibacterial and mildewproof functions comprises the following steps:
1) melt spinning: a component A and a component B are spun and melted to form a continuous bicomponent composite filament with a sheath-core structure; the component A comprises polyethylene and a functional medium with an electricity storage function, and the component B comprises polypropylene and a functional medium with an antibacterial and mildewproof function; or the component A comprises polyethylene and a functional medium with antibacterial and mildewproof effects, and the component B comprises polypropylene and a functional medium with electricity storage effect;
2) forming a net: the skin-core structure continuous bicomponent composite filament is subjected to filament separation to form a net;
3) reinforcing and forming: adopting hot air to melt, bond and solidify to form a bi-component spun-bonded material;
4) high-voltage electrostatic treatment: charging the bicomponent spunbond material;
the functional medium with the electricity storage function comprises the following raw material components in parts by weight:
the functional medium with the antibacterial and mildewproof effects comprises the following raw material components in parts by weight:
2. the preparation method according to claim 1, wherein the mass ratio of the component A to the component B is 3:7 to 5: 5.
3. The method of claim 1, comprising one or more of the following features:
the melt index of the polyolefin slice is (12-40) g/10 min;
a hindered amine light stabilizer 944 of said hindered amine light stabilizer.
4. The method of claim 1, comprising one or more of the following features:
the addition amount of the functional medium with the electricity storage function is 0.5-4 wt% of the total mass of the component A or the component B;
the addition amount of the medium with the antibacterial and mildewproof functions is 3 to 6 weight percent of the total mass of the component A or the component B.
5. The method of claim 1, comprising one or more of the following features:
the component A and the component B are respectively melted and extruded by a screw extruder and then enter a composite spinning box body, and then are accurately distributed by a melt flow channel and spun by a spinning component system to form a skin-core structure continuous bicomponent composite filament;
the temperature of the component A subjected to melt extrusion by a screw extruder is 210-240 ℃;
the temperature of the component B for melt extrusion through a screw extruder is set to be 240-295 ℃;
in the composite spinning beam, the temperature of the composite spinning beam is 220-265 ℃.
6. The method of claim 1, wherein step 4) includes one or both of the following features:
the double-component spun-bonded material is subjected to corona charging by an alternating direct current electric field through high-voltage static electricity, and the front surface and the back surface of the material are charged;
the charging voltage is 10 KV-120 KV;
the vertical distance between the metal needle or the metal wire releasing the electric charge and the material is 2 cm-15 cm;
the charging time is 2 s-20 s.
7. The polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildewproof functions, which is prepared by the preparation method of any one of claims 1-6.
8. The polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildewproof functions as claimed in claim 7, which is characterized by comprising one or two of the following characteristics:
the gram weight of the polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildewproof functions is 70-150 g/m2；
The polyolefin spunbonded filament electrostatic skeleton filter material with the antibacterial and mildewproof functions has the width of 1.6-3.2 m.
9. The use of the polyolefin spunbonded filament electrostatic skeleton filter with antibacterial and antifungal functions as claimed in claim 7 or 8 in the field of air filtration.
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