CN109603303A - A kind of needle thorn electrostatic cotton filtering material of the auxiliary agent containing energization and preparation method thereof - Google Patents
A kind of needle thorn electrostatic cotton filtering material of the auxiliary agent containing energization and preparation method thereof Download PDFInfo
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- CN109603303A CN109603303A CN201910018060.9A CN201910018060A CN109603303A CN 109603303 A CN109603303 A CN 109603303A CN 201910018060 A CN201910018060 A CN 201910018060A CN 109603303 A CN109603303 A CN 109603303A
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- 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
- B01D39/02—Loose filtering material, e.g. loose fibres
- B01D39/04—Organic material, e.g. cellulose, cotton
-
- 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
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/024—Woven fabric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/20—All layers being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0253—Polyolefin fibres
Abstract
The present invention relates to the needle of a kind of auxiliary agent containing energization thorn electrostatic cotton filtering materials and preparation method thereof, and wherein needle thorn electrostatic cotton filtering material includes: to meet knoisphere spunlaid fibres net and supporting layer spun-bonded hot rolling material；Wherein meet knoisphere spunlaid fibres net auxiliary agent containing energization；Wherein energization auxiliary agent is the mixture of barium titanate nano particle and titania nanoparticles.The needle of the auxiliary agent containing energization of the invention pierces electrostatic cotton filtering material, it is particularly possible to solve the problems, such as to load that filtration resistance after a period of time is ramping up and electret filter material filter efficiency declines obvious problem over time.It on the one hand, is to meet dirt filter layer with spunlaid fibres net, fluffy material structure can pass through for air molecule and provide more aperture passages, advantageously reduce filtration resistance；On the other hand, compared with conventional electrostatic cotton material, addition energization auxiliary agent can be obviously improved the electret performance of material, help to improve electrostatic attraction effect and delay the decaying of filter efficiency.
Description
Technical field
The invention belongs to air filting material preparation field, in particular to the needle thorn electrostatic cotton filtering of a kind of auxiliary agent containing energization
Material and preparation method thereof.
Background technique
In recent years, China while rapid economic development, also brings a series of environmental problem, especially air
It pollutes increasingly severe.According to statistics, in past 10 years, about 14,000,000 tons of particulate matter is discharged into atmosphere every year in China
In, these particulate matters seriously threaten the health of people, air visibility, weather and ecological balance etc..Especially
PM2.5Particle has the characteristics that size is smaller, the service life is long and spread scope is wide, it is easy to enter lung by the respiratory system of people
Human body is endangered especially serious so as to cause pulmonary disease, heart disease and premature death etc. in portion.In face of increasingly
The air pollution of aggravation, air filtration are to capture particulate matter, reduce the effective means of pollution, therefore how preparing effective sky
Gas filtering material is current significant problem urgently to be solved.
Patent CN103537142A discloses a kind of needle thorn electrostatic cotton filtering material, but is not added in preparation process
The energization auxiliary agent of effect, therefore there is a problem of that filter efficiency decays serious after electrostatic attraction is ineffective and a period of time；Patent
CN206534167U discloses a kind of haze Mask main body material and mask, including needle thorn electrostatic cotton is the first filter layer and stays
Pole melt-blown material is that the second filter layer is also deposited likewise, being not added with the energization auxiliary agent that can promote electret effect in preparation process
Filter efficiency decays serious problem over time；Patent CN106890506A discloses a kind of low impedance high efficient energy air
Filtering material, using needling material as base, electrostatic spinning film is surface layer, but due to electrospun material fibre diameter is small,
The features such as aperture is small is easy to the problem of blocking, filtration resistance is caused to be ramping up as both surface filtration material；Patent
CN106076000A discloses a kind of multilayer melt-blown composite filter material for adding energization auxiliary agent, including dust-collecting face layer is meltblown material
Material, middle layer melt-blown material and filter bed of essence melt-blown material wherein being all added with energization auxiliary agent in each layer melt-blown material, but are meltblown
Material has that filtration resistance is big, and especially after loading filtering after a period of time, resistance is ramping up.
The non-woven material in filtering is applied mainly to have spunbonded materials, melt-blown material, needling material and electrostatic at present
Spinning material etc..Wherein electrostatic spinning is due to fibre diameter is small and bulk density is high, Electrospun nano-fibers film
Structure is often very close, therefore filtration resistance is larger, in addition, static spinning membrane dust containing capacity is small, it is serious to constrain filtering material
Service life.Melt-blown material has preparation process flow short, and technologically advanced, at low cost, raw material is easy to get, and (polypropylene is the most frequently used
Raw material) the features such as, be more common non-woven filter material at present, be generally used for the filtering such as haze mask, breathing mask
The lesser particle of grain, belongs to the high filtering material of filtering accuracy, but the problem higher there is also filtration resistance, is especially adding
During load, resistance is ramping up.Although traditional spunbond filtering material and acupuncture filter material can be fluffy by being prepared into
Structure reduces filtration resistance, but filter efficiency is relatively low, and is difficult to capture the small particulate matter of some sizes, be only suitable for
Do primarily efficient filter and protection supporting role.
Barium titanate (BaTiO3) it is a kind of typical perovskite ceramics material, there is excellent dielectric, piezoelectricity, ferroelectricity, resistance to
Pressure and insulation performance are a kind of carriers of outstanding charge storage, barium titanate nano particle are added in polypropylene agglomerate and is melted
Spray, can be effectively improved electret charge storage performance, delay the decaying of filter efficiency.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of needle of auxiliary agent containing energization thorn electrostatic cotton filtering material and its
Preparation method, the existing some filtering material resistances of present invention solution are bigger than normal, the filtration resistance especially after loading a period of time
The problem of being ramping up and electret filter material filter efficiency decline obvious problem over time.On the one hand, with
Spunlaid fibres net is to meet dirt filter layer, and fluffy material structure can be logical across more apertures are provided for air molecule
Road advantageously reduces filtration resistance；On the other hand, knoisphere material is being met added with energization auxiliary agent, with conventional electrostatic cotton material
It compares, addition energization auxiliary agent can be obviously improved the electret performance of material, help to improve electrostatic attraction effect and delay to filter
The decaying of efficiency.
To achieve the above object, the invention provides the following technical scheme: a kind of needle thorn electrostatic cotton filtering of auxiliary agent containing energization
Material, the needle thorn electrostatic cotton filtering material includes: to meet knoisphere spunlaid fibres net and supporting layer spun-bonded hot rolling material；
It is described to meet knoisphere spunlaid fibres net auxiliary agent containing energization；
The energization auxiliary agent is the mixture of barium titanate nano particle and titania nanoparticles.
Preferably, the fibre diameter for meeting knoisphere spunlaid fibres net is 1.5~3D, and surface density is 50~300g/
m2, with a thickness of 0.50~5.00mm.
Preferably, the fibre diameter of the supporting layer spun-bonded hot rolling material is 1.5~3D, and surface density is 10~15g/m2,
With a thickness of 0.10~0.20mm.
Preferably, in the energization auxiliary agent, by mass percentage, barium titanate is 40~60%, titanium dioxide be 40~
60%.
The invention further relates to a kind of needles of auxiliary agent containing energization to pierce electrostatic cotton filtering material preparation method, is suitable for above-mentioned one kind
The needle of the auxiliary agent containing energization pierces electrostatic cotton filtering material, comprising steps of
(1) it meets the preparation of knoisphere spunlaid fibres net: energization auxiliary agent and polypropylene chip is separately added into the two of pelletizer
A feeding hopper, melting extrusion at a temperature of 200 DEG C are cut granulating after water-bath cooling, are changed after drying processing
Sexupara grain, then by modified master batch and conventional polypropylene slice mixing, as knoisphere material feedstock is met after mixing, by conventional poly-
Object filature fleece formation device is closed, polypropylene filamente fiber net is prepared；
(2) prepared by supporting layer spun-bonded hot rolling material: being original with conventional polypropylene slice by conventional polymer spun bond apparatus
Material prepares polypropylene fiber net, then hot rolling is reinforced, and supporting layer spun-bonded hot rolling material is prepared；
(3) needle pierces: the polypropylene filamente fiber net prepared in step (1) is placed in upper layer, step as knoisphere material is met
(2) the spun-bonded hot rolling material prepared in is placed on lower layer as support, through pinprick reinforcement prepares needling material after compound；
(4) electret: the needling material prepared in step (3) is handled by Corona charge, obtains needle thorn electrostatic cotton mistake
Filter material material.
Preferably, it is 10% that energization auxiliary agent, which accounts for modified polypropylene agglomerate mass ratio, in the step (1)；It is helped added with energization
It is 10~20% that the modified polypropylene agglomerate quality of agent, which accounts for and meets knoisphere quality of materials ratio,.
Preferably, hot rolling is that point bonding is reinforced in the step (2), and texturing roll temperature is 135~138 DEG C, smooth roll temperature
It is 134~136 DEG C.
Preferably, pinprick reinforcement in the step (3) specifically: pass through one of pre-needling, the main pinprick reinforcement of twice, needle thorn
Density is 100~400 thorns/cm2, 5~10mm of depth of needling.
Preferably, electret in the step (4) specifically: discharged using needle-tip corona, electret voltage is 30~50kV, is stayed
For pole span from for 3~5cm, the electret time is 30~50 seconds, and electret temperature is 20~25 DEG C, and humidity is 30~40%.
The needle of the auxiliary agent containing energization of the invention pierces electrostatic cotton filtering material, be by spunlaid fibres net as meet knoisphere and
Spun-bonded hot rolling material as supporting layer it is compound after by pinprick reinforcement, then handle using Corona charge made of, with a thickness of
0.60~5.20mm, surface density are 60~315g/m2；The fibre diameter for meeting knoisphere spunlaid fibres net is 15~25
μm, surface density is 50~300g/m2, with a thickness of 0.50~5.00mm, it is added with energization auxiliary agent；The supporting layer spun-bonded hot rolling
The fibre diameter of material is 10~15 μm, and surface density is 10~15g/m2, with a thickness of 0.10~0.20mm；The energization auxiliary agent
For the mixture of barium titanate nano particle and titania nanoparticles, mass percent is respectively 50~60% and 40~
50%.
The beneficial effects of the present invention are:
1) the electrostatic cotton filtering material for being added to energization auxiliary agent of the invention is to meet dirt filtering with spunlaid fibres net
Layer, fluffy material structure can pass through for air molecule and provide more aperture passages, advantageously reduce filtration resistance；
2) the electrostatic cotton filtering material for being added to energization auxiliary agent of the invention is added with energization auxiliary agent meeting knoisphere material,
Compared with conventional electrostatic cotton material, addition energization auxiliary agent can be obviously improved the electret performance of material, help to improve electrostatic
Sucking action and the decaying for delaying filter efficiency；
3) the electrostatic cotton filtering material for being added to energization auxiliary agent of the invention, process route is simple, with conventional staple fiber
The electrostatic cotton material of pinprick reinforcement is compared after combing networking, and spun-bonded continuous yarn fiber production process is avoided and applied without adding finish
The problem that oiling agent causes electret charge decay rapid.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment 1
Meet the preparation of knoisphere spunlaid fibres net:
Energization auxiliary agent and polypropylene chip are separately added into two feeding hoppers of pelletizer, melts and squeezes at a temperature of 200 DEG C
(temperature can be in 200 DEG C or so slight fluctuations) out cuts granulating, after drying processing after water-bath cooling to obtain the final product
To modified master batch, it is 10% that energization auxiliary agent, which accounts for modified polypropylene agglomerate mass ratio, and the energization auxiliary agent is barium titanate and titanium dioxide
The mixture of titanium, wherein barium titanate and titanium dioxide mass percent are respectively 40% and 60%；Then by modified master batch and often
Isotactic polypropylene slice mixing, as knoisphere material feedstock is met after mixing, modified polypropylene agglomerate quality, which accounts for, meets knoisphere quality of materials
Than being 10%；By conventional polymer filature fleece formation device, preparation fibre diameter is 1.5D, surface density 50g/m2, with a thickness of
(process belongs to what those skilled in that art were understood thoroughly to the polypropylene filamente fiber net of 0.50mm, does not do herein excessive superfluous
It states)；
The preparation of supporting layer spun-bonded hot rolling material: by conventional polymer spun bond apparatus, using conventional polypropylene slice as raw material,
Preparation fibre diameter is 2D, surface density 10g/m2, reinforced with a thickness of the polypropylene fiber net of 0.10mm, then hot rolling, preparation
Supporting layer spun-bonded hot rolling material, hot rolling are that point bonding is reinforced, and texturing roll temperature is 135 DEG C, and smooth roll temperature is 134 DEG C；
Needle thorn: it is placed in upper layer using prepared polypropylene filamente fiber net as knoisphere material is met, by prepared spunbond
Hot-finished material is placed on lower layer as support, prepares after compound through pinprick reinforcement with a thickness of 0.60mm, surface density 60g/m2
Needling material, acupuncture course include one of pre-needling, the main pinprick reinforcement of twice, needling density be 100 thorns/cm2, depth of needling
6mm；
Electret: prepared needling material is handled by Corona charge, obtains needle thorn electrostatic cotton filtering material, wherein
Electret is discharged using needle-tip corona, and electret voltage is 30kV, and electret distance is 3cm, and the electret time is 30 seconds, and electret temperature is 22
DEG C, humidity 35%.
As the preferred embodiment of the invention, gained needle thorn electrostatic cotton filtering is tested using automatic filtrate tester through experiment
The filter efficiency and filtration resistance of material: being respectively 0.20,0.30 and 1.0 to mass median diameter when flow velocity is 32L/min
μm sodium chloride aerosol filter efficiency be respectively 46.77%, 58.51% and 92.82%, filtration resistance 1.0Pa.It is sealing
After storage 30 days, the sodium chloride aerosol filter efficiency for being respectively 0.20,0.30 and 1.0 μm to mass median diameter is respectively
42.97%, 55.83% and 91.12%, filtration resistance 1.0Pa.
Embodiment 2
Meet the preparation of knoisphere spunlaid fibres net: two that energization auxiliary agent and polypropylene chip are separately added into pelletizer feed
Hopper, melting extrusion at a temperature of 200 DEG C cut granulating after water-bath cooling, modified mother are obtained after drying processing
Grain, it is 10% that energization auxiliary agent, which accounts for modified polypropylene agglomerate mass ratio, and energization auxiliary agent is the mixture of barium titanate and titanium dioxide,
Middle barium titanate and titanium dioxide mass percent are respectively 50% and 50%；Then modified master batch and conventional polypropylene are sliced mixed
It closes, as knoisphere material feedstock is met after mixing, it is 15% that modified polypropylene agglomerate quality, which accounts for and meets knoisphere quality of materials ratio,；By normal
Polymer spinning web forming device is advised, preparation fibre diameter is 2D, surface density 150g/m2, long with a thickness of the polypropylene of 2.00mm
Silk fiber net；
The preparation of supporting layer spun-bonded hot rolling material: by conventional polymer spun bond apparatus, using conventional polypropylene slice as raw material,
Preparation fibre diameter is 2.5D, surface density 12g/m2, reinforced with a thickness of the polypropylene fiber net of 0.12mm, then hot rolling, system
Standby supporting layer spun-bonded hot rolling material, hot rolling are that point bonding is reinforced, and texturing roll temperature is 136 DEG C, and smooth roll temperature is 135 DEG C；
Needle thorn: it is placed in upper layer using prepared polypropylene filamente fiber net as knoisphere material is met, by prepared spunbond
Hot-finished material is placed on lower layer as support, prepares after compound through pinprick reinforcement with a thickness of 2.12mm, surface density 162g/m2's
Needling material, acupuncture course include one of pre-needling, the main pinprick reinforcement of twice, and needling density is 200 thorns/cm2, depth of needling
8mm；
Electret: prepared needling material is handled by Corona charge, obtains needle thorn electrostatic cotton filtering material, wherein
Electret is discharged using needle-tip corona, and electret voltage is 40kV, and electret distance is 4cm, and the electret time is 35 seconds, and electret temperature is 25
DEG C, humidity 40%.
As the preferred embodiment of the invention, gained needle thorn electrostatic cotton filtering is tested using automatic filtrate tester through experiment
The filter efficiency and filtration resistance of material: being respectively 0.20,0.30 and 1.0 to mass median diameter when flow velocity is 32L/min
μm sodium chloride aerosol filter efficiency be respectively 79.41%, 86.03% and 99.65%, filtration resistance 2.5Pa.It is sealing
After storage 30 days, the sodium chloride aerosol filter efficiency for being respectively 0.20,0.30 and 1.0 μm to mass median diameter is respectively
76.14%, 84.23% and 98.15%, filtration resistance 2.4Pa.
Embodiment 3
Meet the preparation of knoisphere spunlaid fibres net: two that energization auxiliary agent and polypropylene chip are separately added into pelletizer feed
Hopper, melting extrusion at a temperature of 200 DEG C cut granulating after water-bath cooling, modified mother are obtained after drying processing
Grain, it is 10% that energization auxiliary agent, which accounts for modified polypropylene agglomerate mass ratio, and energization auxiliary agent is the mixture of barium titanate and titanium dioxide,
Middle barium titanate and titanium dioxide mass percent are respectively 60% and 40%；Then modified master batch and conventional polypropylene are sliced mixed
It closes, as knoisphere material feedstock is met after mixing, it is 20% that modified polypropylene agglomerate quality, which accounts for and meets knoisphere quality of materials ratio,；By normal
Polymer spinning web forming device is advised, preparation fibre diameter is 2.5D, surface density 250g/m2, with a thickness of the polypropylene of 4.00mm
Filament web；
The preparation of supporting layer spun-bonded hot rolling material: by conventional polymer spun bond apparatus, using conventional polypropylene slice as raw material,
Preparation fibre diameter is 3.0D, surface density 15g/m2, reinforced with a thickness of the polypropylene fiber net of 0.15mm, then hot rolling, system
Standby supporting layer spun-bonded hot rolling material, hot rolling are that point bonding is reinforced, and texturing roll temperature is 138 DEG C, and smooth roll temperature is 136 DEG C；
Needle thorn: it is placed in upper layer using prepared polypropylene filamente fiber net as knoisphere material is met, by prepared spunbond
Hot-finished material is placed on lower layer as support, prepares after compound through pinprick reinforcement with a thickness of 4.15mm, surface density 265g/m2's
Needling material, acupuncture course include one of pre-needling, the main pinprick reinforcement of twice, and needling density is 300 thorns/cm2, depth of needling
10mm；
Electret: prepared needling material is handled by Corona charge, obtains needle thorn electrostatic cotton filtering material, wherein
Electret is discharged using needle-tip corona, and electret voltage is 45kV, and electret distance is 4cm, and the electret time is 40 seconds, and electret temperature is 20
DEG C, humidity 40%.
As the preferred embodiment of the invention, gained needle thorn electrostatic cotton filtering is tested using automatic filtrate tester through experiment
The filter efficiency and filtration resistance of material: being respectively 0.20,0.30 and 1.0 to mass median diameter when flow velocity is 32L/min
μm sodium chloride aerosol filter efficiency be respectively 93.88%, 96.68% and 100%, filtration resistance 4.2Pa.It is deposited in sealing
After storage 30 days, the sodium chloride aerosol filter efficiency for being respectively 0.20,0.30 and 1.0 μm to mass median diameter is respectively
90.97%, 95.93% and 99.76%, filtration resistance 4.1Pa.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. a kind of needle of auxiliary agent containing energization pierces electrostatic cotton filtering material, it is characterised in that: the needle pierces electrostatic cotton filtering material packet
It includes: meeting knoisphere spunlaid fibres net and supporting layer spun-bonded hot rolling material；
It is described to meet knoisphere spunlaid fibres net auxiliary agent containing energization；
The energization auxiliary agent is the mixture of barium titanate nano particle and titania nanoparticles.
2. a kind of needle of auxiliary agent containing energization according to claim 1 pierces electrostatic cotton filtering material, it is characterised in that: described to meet
The fibre diameter of knoisphere spunlaid fibres net is 1.5~3D, and surface density is 50~300g/m2, with a thickness of 0.50~5.00mm.
3. a kind of needle of auxiliary agent containing energization according to claim 1 pierces electrostatic cotton filtering material, it is characterised in that: the branch
The fibre diameter for supportting layer spun-bonded hot rolling material is 1.5~3D, and surface density is 10~15g/m2, with a thickness of 0.10~0.20mm.
4. a kind of needle of auxiliary agent containing energization according to claim 1 pierces electrostatic cotton filtering material, it is characterised in that: described
In energization auxiliary agent, by mass percentage, barium titanate is 40~60%, titanium dioxide is 40~60%.
5. a kind of needle of auxiliary agent containing energization pierces electrostatic cotton filtering material preparation method, it is suitable for such as any one of claim 1-4 institute
A kind of needle for the auxiliary agent containing energization stated pierces electrostatic cotton filtering material, comprising steps of
(1) meet the preparation of knoisphere spunlaid fibres net: two that energization auxiliary agent and polypropylene chip are separately added into pelletizer feed
Hopper, melting extrusion at a temperature of 200 DEG C cut granulating after water-bath cooling, modified mother are obtained after drying processing
Then modified master batch and conventional polypropylene slice mixing are passed through conventional polymer as knoisphere material feedstock is met after mixing by grain
Filature fleece formation device prepares polypropylene filamente fiber net；
(2) prepared by supporting layer spun-bonded hot rolling material: by conventional polymer spun bond apparatus, using conventional polypropylene slice as raw material,
Polypropylene fiber net is prepared, then hot rolling is reinforced, and supporting layer spun-bonded hot rolling material is prepared；
(3) needle pierces: upper layer is placed in using the polypropylene filamente fiber net prepared in step (1) as meeting knoisphere material, in step (2)
The spun-bonded hot rolling material of preparation is placed on lower layer as support, through pinprick reinforcement prepares needling material after compound；
(4) electret: the needling material prepared in step (3) is handled by Corona charge, obtains needle thorn electrostatic cotton filter material
Material.
6. a kind of needle of auxiliary agent containing energization according to claim 5 pierces electrostatic cotton filtering material preparation method, feature exists
In: it is 10% that energization auxiliary agent, which accounts for modified polypropylene agglomerate mass ratio, in the step (1)；Modification poly- third added with energization auxiliary agent
It is 10~20% that alkene master batch quality, which accounts for and meets knoisphere quality of materials ratio,.
7. a kind of needle of auxiliary agent containing energization according to claim 5 pierces electrostatic cotton filtering material preparation method, feature exists
In: hot rolling is that point bonding is reinforced in the step (2), and texturing roll temperature is 135~138 DEG C, and smooth roll temperature is 134~136 DEG C.
8. a kind of spun-bonded needle punched composite filter material preparation method of auxiliary agent containing energization according to claim 5, feature
It is: pinprick reinforcement in the step (3) specifically: pass through one of pre-needling, the main pinprick reinforcement of twice, needling density 100
~400 thorns/cm2, 5~10mm of depth of needling.
9. a kind of spun-bonded needle punched composite filter material preparation method of auxiliary agent containing energization according to claim 5, feature
It is: electret in the step (4) specifically: discharged using needle-tip corona, electret voltage is 30~50kV, and electret distance is 3
~5cm, electret time are 30~50 seconds, and electret temperature is 20~25 DEG C, and humidity is 30~40.
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Application publication date: 20190412 |