CN111206294A - Polyolefin electrostatic filter material with flame retardant function and preparation method and application thereof - Google Patents

Polyolefin electrostatic filter material with flame retardant function and preparation method and application thereof Download PDF

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Publication number
CN111206294A
CN111206294A CN201811390864.3A CN201811390864A CN111206294A CN 111206294 A CN111206294 A CN 111206294A CN 201811390864 A CN201811390864 A CN 201811390864A CN 111206294 A CN111206294 A CN 111206294A
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component
flame retardant
function
polyolefin
melt
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CN111206294B (en
Inventor
杨占元
陈立东
陈连忠
徐克勤
陈致帆
柏国清
朱德洪
高丰和
吴建军
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Shanghai Jingfa Industry Co ltd
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Shanghai Kingfo Industrial Co ltd
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • 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
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • 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
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/34—Core-skin structure; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F1/00—General methods for the manufacture of artificial filaments or the like
    • D01F1/02—Addition of substances to the spinning solution or to the melt
    • D01F1/10—Other agents for modifying properties
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
    • D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
    • D06M10/025—Corona discharge or low temperature plasma

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Filtering Materials (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The invention provides a polyolefin electrostatic filter material with flame retardant function and 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 subjected to melt spinning to form a sheath-core structure continuous bicomponent composite filament; the component A comprises polyethylene and a functional medium with an electricity storage function, and the component B comprises polypropylene and a medium with a flame retardant function; or the component A comprises polyethylene and a medium with a flame retardant function, and the component B comprises polypropylene and a functional medium with an electricity storage function; 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 filter material provided by the invention integrates the flame retardant function and the electrostatic filtering function, and the flame retardant property can meet the flame retardant standard FMVSS302 and the Chinese GB8410 standard of the American automotive interior material.

Description

Polyolefin electrostatic filter material with flame retardant function and preparation method and application thereof
Technical Field
The invention relates to a non-woven material, in particular to a polyolefin electrostatic filter material with a flame retardant function, and a preparation method and application thereof.
Background
In the field of air filtration of vehicle-mounted air conditioners, fresh air purification and the like, the mainstream technology and the medium-efficiency filtration product in the markets at home and abroad at present are mainly melt-blown fine filtration materials or electrostatic cotton filtration materials, and the filter materials are compounded with non-woven fabric framework reinforcing materials through glue compounding, ultrasonic bonding, high-temperature high-pressure compounding and other processes, so that the standards and requirements of medium-efficiency filtration at different levels are met.
In the conventional high-efficiency filter material at F, H level, the melt-blown composite framework material is adopted at home and abroad, and the composite filter material is also a research hotspot at home and abroad at present, and focuses on the aspects of development of electrostatic electret technology of melt-blown fine filter material, optimization and promotion of composite technology of melt-blown and framework material, multi-layer fiber web composite technology, high-efficiency and low-resistance performance research of the composite filter material and the like. Patent CN105999856A discloses an energized polypropylene/polyester bi-component spunbonded filter material and a preparation method thereof, which mainly adopts a plurality of layers of spunbonded filament fiber nets with different fineness to be superposed and then to be solidified and formed, and finally the filter material is obtained through corona charging, the processing technology relates to multi-channel processing, the process control points are more and more, and the filtering resistance of the product is larger; patent CN105964059A discloses an energized polyethylene/polypropylene bi-component spunbonded filter material and a preparation method thereof, and the principle of the main inventive content is the same as that of the corresponding product; patent CN1055586714A discloses a high static electricity long fiber non-woven fabric and a manufacturing method thereof, which relates to a filament spun-bonded filter material with a skin-core structure, wherein inorganic particles are added into a skin layer material to be made into a non-woven fabric, and then static electricity is added to the non-woven fabric, and finally a filter material is obtained. In particular, the prior art and the products do not have a flame retardant function, the stiffness of the products cannot be guaranteed, the self-reinforcing performance is poor or the products must be compounded with other materials to achieve the reinforcing effect, and the subsequent mechanical folding treatment is not facilitated.
In various composite filter materials, although the composite filter material has the advantages of fine filtration, high dust holding capacity and the like, the control of a multilayer composite process is relatively more fine and complex, the manufacturing and processing process of the composite filter material is divided into multiple steps, the requirements on performance indexes, yield and the like of component materials are high, the glue compounding process is a mainstream processing process, and the glue type, smell and environmental protection have potential safety hazards on human health; before the composite filter material is processed into a filter, mechanical folding is needed, and the problems of abrasion, fluffing, layering and the like of a surface layer material are easily caused in the composite material in the process, so that the performance of the composite filter material is reduced, and the cost and the yield are difficult to control; in addition, the composite filter material is generally a melt-blown material or an electrostatic cotton material, and is subjected to composite processing in a glue compounding or hot rolling or ultrasonic wave compounding mode, and the process determines that the filter resistance of the product material is generally large, so that the energy consumption of the air purification system is objectively increased.
Moreover, the flame retardant function of the common flame retardant materials in the current filtration field market is mainly based on a simple skeleton support material, and most of the flame retardant materials are dry-process short fiber and wet-process short fiber aggregates, and although the two materials have a very mature and complete manufacturing technology and extremely high market popularity, the following defects which cannot be avoided are still existed:
1. the short fiber dry-method aggregate is mostly formed by blending polyester short fibers and low-melting-point short fibers and then hot-melting and reinforcing, but in the process of compounding the material with other materials in the subsequent procedure, the low-melting-point fibers are easily heated to shrink and deform greatly under the working condition of process temperature;
2. wet short fiber aggregate has urgent quality hidden danger in the automobile manufacturing application industry which increasingly emphasizes VOC control due to the dissipation of toxic odor;
3. the short fiber dry method and wet method aggregate has smaller rebound deformation amount after pleating, which is not beneficial to the assembly of assembling and disassembling the automobile air conditioner filter element;
4. the short fiber aggregate component fibers are disorderly arranged and oriented, the appearance color and luster of the formed fabric is darker, and the style and aesthetic feeling of the fabric are poorer;
5. the chopped fiber aggregate is mainly subjected to flame retardant property by adopting the processes of dipping flame retardant mother liquor and tentering and drying, the process is difficult and easy to discolor, and more importantly, the process cannot deal with increasingly severe environmental protection supervision.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention aims to provide a polyolefin electrostatic filter material with flame retardant function, a preparation method and a use thereof, which are used to replace the existing filtering composite material in the market or solve the problems in the prior art, and simultaneously fill up the related products and technical blank that the flame retardant function and the electrostatic filtering function are combined into one in the current air filtering 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 electrostatic filter material with a flame retardant function, which comprises the following steps:
1) melt spinning: a component A and a component B are subjected to melt spinning to form a sheath-core structure continuous bicomponent composite filament; the component A comprises polyethylene and a functional medium with an electricity storage function, and the component B comprises polypropylene and a medium with a flame retardant function; or the component A comprises polyethylene and a medium with a flame retardant function, and the component B comprises polypropylene and a functional medium with an electricity storage function;
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 5-12 deniers.
Preferably, the functional medium with the electricity storage function comprises the following raw material components in parts by weight:
Figure BDA0001874011220000031
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 wt% to 4 wt% of the total mass of the component A.
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, and increases the crystallinity of fibers through nucleating agent components under the regulation of a stabilizing agent, thereby achieving more and more stable storage of captured charges.
More preferably, the medium with flame retardant function is a polyolefin-based halogen-free flame-retardant master batch. Such as halogen-free polyethylene flame-retardant master batch or halogen-free polypropylene flame-retardant master batch.
Preferably, the addition amount of the medium with the flame retardant function is 3 to 10 weight percent 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 electrostatic filter material with a flame retardant function, which is prepared by the method.
Preferably, the gram weight of the polyolefin electrostatic filter material with the flame retardant function is 90-150 g/m2。
Preferably, the width of the polyolefin electrostatic filter material with the flame retardant function is 1.6-32. m.
The invention also discloses the application of the polyolefin electrostatic filter material with the flame retardant function in the field of air filtration.
The polyolefin electrostatic filter material with the flame retardant function is a single-layer medium-high-efficiency filter material, but can reach the same filtering efficiency of a composite filter material, has double filtering functions of physical separation and electrostatic adsorption, has excellent self-reinforcing performance, can be directly folded and processed, has extremely low filtering resistance and high air permeability, can completely replace a corresponding medium-efficiency filtering composite filter material product in the current market, particularly can meet the flame retardant standards FMVSS302 and China GB8410 of the American automotive interior trim material, and is mainly applied to the fields of automotive air conditioner filtering, fresh air system filtering, dust collector filtering, household air purifiers and the like.
Compared with the prior art, the invention has the following advantages:
1. according to the polyolefin electrostatic filter material with the flame retardant function, the thermal properties of the component polymers are optimized and matched, the electret filter product is obtained by utilizing the composite spinning net formation and hot melt adhesion reinforcement forming processes of the polymers with different melting properties and finally through high-voltage electrostatic treatment, the high mechanical strength and the 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 net formation forming and corona charging, the manufacturing process is greatly simplified compared with an offline composite filter material manufacturing process 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 electrostatic filter material with the flame retardant function is used as a single-layer filter material, can replace a conventional melt-blown and skeleton composite filter material in the fields of automobile-mounted air conditioners, fresh air systems, air purifiers and the like by virtue of excellent self-enhancement 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 electrostatic filter material with the flame retardant function of the invention has the fabric appearance style which is different and identifiability from the common style of a staple fiber framework and a melt-blown filter product in the current market, and has unique filament aesthetic feeling.
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 filter material with the flame retardant function has the outstanding advantages that the flame retardant function and the electrostatic filter function are combined into a whole, particularly, the flame retardant performance can meet the flame retardant standard FMVSS302 of the American automotive interior trim and the standard GB8410 of China, the product fills the technical blank in the field of domestic air purification, and the industry 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
Polyolefin in the component A is PE master batch, 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 batch of the component A; and the polyolefin in the component B is PP master batch, the melting point is 162-165 ℃, and meanwhile, PP halogen-free flame-retardant master batch accounting for 10 wt% of the total mass of the component B is mixed into the PP master batch 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:
Figure BDA0001874011220000061
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 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; setting the temperature of the rotary screen hot air oven 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 45KV, 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 45 percent, and the filtration resistance is 2.2 Pa; actually measuring the fiber fineness of 8D; the actually measured flame retardant performance result is as follows: the automobile interior material can be automatically extinguished after being away from fire, and meets the flame retardant standard FMVSS302 of the American automobile interior material and the standard GB8410 of China.
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 to be 8.6D; the actually measured flame retardant performance result is as follows: the automobile interior material can be automatically extinguished after being away from fire, and meets the flame retardant standard FMVSS302 of the American automobile interior material and the standard GB8410 of China.
Comparative examples 1 to 2
In the implementation process of the comparative example, a medium with a flame retardant function is not added in the component B, and other manufacturing factors, such as the specification and the 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 actually measured filtration efficiency is 48%, and the filtration resistance is 2.3 Pa; actually measuring the fiber fineness to be 8.7D; the actually measured flame retardant performance result is as follows: the flame-retardant automobile interior material still burns when leaving fire, and does not meet the flame-retardant standard FMVSS302 of the American automobile interior material and the standard of Chinese GB 8410.
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; the component B is not added with a medium with a flame retardant function, and other manufacturing factors, such as the specification and the 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 B in the embodiment 1. The gram weight is 110g/m2The actually measured filtration efficiency is 3.09%, and the filtration resistance is 2.3 Pa; actually measuring the fiber fineness to be 8.3D; the actually measured flame retardant performance result is as follows: the flame-retardant automobile interior material still burns when leaving fire, and does not meet the flame-retardant standard FMVSS302 of the American automobile interior material and the standard of Chinese GB 8410.
Example 2
The polyolefin polymer in the component A is PE master batch, the melting point is 130-135 ℃, and meanwhile, a functional medium with an 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 simultaneously, PP halogen-free flame retardant master batch accounting for 3 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:
Figure BDA0001874011220000071
Figure BDA0001874011220000081
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 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 8.7D; the actually measured flame retardant performance result is as follows: the automobile interior material can be automatically extinguished after being away from fire, and meets the flame retardant standard FMVSS302 of the American automobile interior material and the standard GB8410 of China.
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; the actually measured flame retardant performance result is as follows: the automobile interior material can be automatically extinguished after being away from fire, and meets the flame retardant standard FMVSS302 of the American automobile interior material and the standard GB8410 of China.
Comparative examples 2 to 2
In the implementation process of the comparative example, a medium with a flame retardant function is not added in the component B, and other manufacturing factors, such as the specification and the 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; the actually measured flame retardant performance result is as follows: the flame-retardant automobile interior material still burns when leaving fire, and does not meet the flame-retardant standard FMVSS302 of the American automobile interior material and the standard of Chinese GB 8410.
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 a flame retardant 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 9.5D; the actually measured flame retardant performance result is as follows: the flame-retardant automobile interior material still burns when leaving fire, and does not meet the flame-retardant standard FMVSS302 of the American automobile interior material and the standard of Chinese GB 8410.
Example 3
Polyolefin in the component A is PE master batch, and meanwhile, the component A is mixed with PE halogen-free flame-retardant master batch with the melting point of 120-132 ℃, wherein the PE halogen-free flame-retardant master batch accounts for 6.5 wt% of the total mass of the component A; the polyolefin in the component B is PP master batch, and a 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:
Figure BDA0001874011220000091
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 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 hot air temperature of the circular net 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; the fiber fineness was found to be 7.9D.
Comparative example 3-1
In the implementation process of the comparative example, the component A is not added with a medium with a flame retardant 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 51 percent, and the filtration resistance is 2.5 Pa; actually measuring the fiber fineness to be 8.1D; the actually measured flame retardant performance result is as follows: still, the flame-retardant automobile interior material does not meet the flame-retardant standard FMVSS302 and the Chinese GB8410 standard of the American automobile interior material when the automobile is away from the fire.
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; the actually measured flame retardant performance result is as follows: the automobile interior material can be automatically extinguished after being away from fire, and meets the flame retardant standard FMVSS302 of the American automobile interior material and the standard GB8410 of China.
Comparative examples 3 to 3
In the implementation process of the comparative example, a medium with a flame retardant 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; actually measuring the fiber fineness to be 7.5D; the actually measured flame retardant performance result is as follows: the flame-retardant automobile interior material still burns when leaving fire, and does not meet the flame-retardant standard FMVSS302 of the American automobile interior material and the standard of Chinese GB 8410.
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 (10)

1. A preparation method of a polyolefin electrostatic filter material with a flame retardant function comprises the following steps:
1) melt spinning: a component A and a component B are subjected to melt spinning to form a sheath-core structure continuous bicomponent composite filament;
the component A comprises polyethylene and a functional medium with an electricity storage function, and the component B comprises polypropylene and a medium with a flame retardant function; or the component A comprises polyethylene and a medium with a flame retardant function, and the component B comprises polypropylene and a functional medium with an electricity storage function;
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.
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 preparation method of claim 1, wherein the functional medium with the function of storing electricity comprises the following raw material components in parts by weight:
Figure FDA0001874011210000011
4. the method of claim 3, 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.
5. 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;
the addition amount of the medium with the flame retardant function is 3-10 wt% of the total mass of the component A or the component B.
6. 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 ℃.
7. 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.
8. The polyolefin electrostatic filter material with the flame retardant function, which is prepared by the preparation method of any one of claims 1-7.
9. The polyolefin electrostatic filter with flame retardant function of claim 8, which is characterized by comprising one or two of the following characteristics:
said hasThe gram weight of the polyolefin electrostatic filter material with the flame-retardant function is 90-150 g/m2；
The polyolefin electrostatic filter material with the flame retardant function has the width of 1.6-32. m.
10. Use of the polyolefin electrostatic filter material with flame retardant function according to claim 8 or 9 in the field of air filtration.
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Citations (6)

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Publication number Priority date Publication date Assignee Title
US5419953A (en) * 1993-05-20 1995-05-30 Chapman; Rick L. Multilayer composite air filtration media
US5721180A (en) * 1995-12-22 1998-02-24 Pike; Richard Daniel Laminate filter media
WO2006128237A1 (en) * 2005-05-31 2006-12-07 Commonwealth Scientific And Industrial Research Organisation Electrostatic filter media and a process for the manufacture thereof
CN102108566A (en) * 2010-12-27 2011-06-29 中国纺织科学研究院 Antistatic type composite flame retardant fiber and preparation method thereof
CN107385683A (en) * 2017-08-11 2017-11-24 上海精发实业股份有限公司 A kind of non-woven filtration media and its production and use
WO2018064500A1 (en) * 2016-09-30 2018-04-05 Hollingsworth & Vose Company Filter media including flame retardant fibers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419953A (en) * 1993-05-20 1995-05-30 Chapman; Rick L. Multilayer composite air filtration media
US5721180A (en) * 1995-12-22 1998-02-24 Pike; Richard Daniel Laminate filter media
WO2006128237A1 (en) * 2005-05-31 2006-12-07 Commonwealth Scientific And Industrial Research Organisation Electrostatic filter media and a process for the manufacture thereof
CN102108566A (en) * 2010-12-27 2011-06-29 中国纺织科学研究院 Antistatic type composite flame retardant fiber and preparation method thereof
WO2018064500A1 (en) * 2016-09-30 2018-04-05 Hollingsworth & Vose Company Filter media including flame retardant fibers
CN107385683A (en) * 2017-08-11 2017-11-24 上海精发实业股份有限公司 A kind of non-woven filtration media and its production and use

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