CN101961580A - The air cleaner nonwoven - Google Patents
The air cleaner nonwoven Download PDFInfo
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- CN101961580A CN101961580A CN2010102364714A CN201010236471A CN101961580A CN 101961580 A CN101961580 A CN 101961580A CN 2010102364714 A CN2010102364714 A CN 2010102364714A CN 201010236471 A CN201010236471 A CN 201010236471A CN 101961580 A CN101961580 A CN 101961580A
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- nonwoven
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- air cleaner
- skin section
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Abstract
The invention provides a kind of air cleaner nonwoven.This air cleaner nonwoven is long air cleaner member of life-span of keeping the higher capture rate of dust, mist in can be between longer-term, not only can also can be used as the long-life filter of various air regulators as the air introducing port of internal combustion engine.This air cleaner nonwoven is that weight per unit area is 150～400g/m
2, be 20～80cc/cm by the Air permenbility of the A law regulation of JIS-L-1906
2The individual layer sheet nonwoven of/sec., it is characterized in that, an one skin section is a low-density portion, and another skin section is a high density portion, comprises that the intermediate layer portion ground between two skin section has in thickness direction upper density continually varying density gradient from low-density portion to high density portion.
Description
Technical field
The present invention relates to a kind of can catch handle airborne sand and dust, carbon dust, other dusts, mist, be fit to air and import air cleaner nonwoven with filter, this air importing mainly is used in the employed engine suction of the internal combustion engine portion of automobile etc. with filter.
Background technology
Usually,,, can adopt with different non-woven fabric compounded of two or more density differences or fiber thickness and after frying batter in a thin layer the product of pressing pleat to process to this thin slice in order to improve capture rate as nonwoven fabric for filter.In patent documentation 1,2, disclose and utilize needle point method that the different layer of density is carried out the filter that the multiple stratification processing forms, in patent documentation 3, disclose the filter that the spun-bond process nonwoven layer that density is different is laminated.In addition, in patent documentation 4, disclose fibre diameter, in patent documentation 5, disclose the stacked bonding method of multilayer chip thing of utilizing air lay method (airlaid) that fibre diameter is different at the top layer filter different with nexine.
Patent documentation 1: Japanese kokai publication hei 10-180023 communique
Patent documentation 2: TOHKEMY 2003-340220 communique
Patent documentation 3: TOHKEMY 2003-236321 communique
Patent documentation 4: Japanese kokai publication hei 11-90135 communique
Patent documentation 5: TOHKEMY 2007-170224 communique
But, in order to catch fine dust, mist, in the base material that filter is used, can adopt superfine fibre that uses the following fiber number of 2dtex and the meltblown nonwoven of cutting apart fiber, air lay method nonwoven, heat viscosity method nonwoven, jet net-spraying method nonwoven, spun-bond process nonwoven, needle point method nonwoven etc. less than 10 μ m.In addition, use density to be 0.15g/cm usually
3Above nonwoven.
In using the filter of aforesaid nonwoven, though since the less capture rate that makes in aperture (pore size) raise, have be easy to stop up, the such shortcoming of lifetime of filter.In addition, have also that aeration resistance is higher, the higher such shortcoming of the pressure loss.
On the other hand, in order to catch the dust more than the 10 μ m, also adopt the nonwoven and the density of the fiber that has used the above fiber number of 3dtex to be 0.14g/cm sometimes
3Following nonwoven.
In the filter that uses this nonwoven, because the aperture is bigger, so the life-span of filter is elongated, but exists capture rate to reduce such shortcoming.
In order to tackle such problem, as mentioned above, in patent documentation 1～3, disclose the technology that the nonwoven layer that density is different builds up multilayer, but patent documentation 1,2 needs the different a plurality of nonwoven of fibre diameter in fact, and, have the such problem of through hole that existence causes because of needle point method.There is such problem in the filter of patent documentation 3,, has the interface between the nonwoven for the nonwoven that engages different densities that is, and concentrating appears in particle in this interface.
On the other hand, filter in the patent documentation 4,5 is to utilize heat energy to engage after tablet is stacked, though this method has been eliminated above-mentioned problem points, but prepare the raw material of a plurality of fibre diameters, and the device that need stack gradually, tablet forms device, raw material feed device is complicated and such new problem that maximizes thereby exist.
Summary of the invention
The object of the present invention is to provide a kind of nonwoven of eliminating when concentration problem appears in particle in the stacked interface, making tablet formation device, raw material feed device obtain simplifying.
Be used for solving the present invention of above-mentioned problem, basic fundamental thought is, for not existing nonwoven stacked interface, that be individual layer and be formed with density gradient on thickness direction to be used for air cleaner in nonwoven layer, makes it have following technical characterictic:
(1) a kind of air cleaner nonwoven, this air cleaner nonwoven are that weight per unit area is 150～400g/m
2, be 20～80cc/cm by the Air permenbility of the A law regulation among the JIS-L-1906 of Japanese Industrial Standards
2The individual layer sheet nonwoven of/sec., it is characterized in that, a skin section of this individual layer sheet nonwoven is a low-density portion, another skin section is a high density portion, comprises that the intermediate layer portion ground between two skin section is formed with density gradient continuous on thickness direction from a skin section to another skin section.
According to (1) described air cleaner nonwoven, it is characterized in that (2) density of above-mentioned low-density portion is 0.01～0.13g/cm
3, the density of above-specified high density portion is 0.15～0.35g/cm
3, the density of high density portion is 1.5～15 times of density of low-density portion.
(3) according to (1) item or (2) described air cleaner nonwoven, it is characterized in that the maximum diameter of hole of the low-density portion of above-mentioned individual layer sheet nonwoven is 30～120 μ m.
(4) according to each described air cleaner nonwoven in the item of (1) item～(3), it is characterized in that the minimum-value aperture of the high density portion of above-mentioned individual layer sheet nonwoven is 0.5～15 μ m.
(5) according to each described air cleaner nonwoven in the item of (1) item～(4), it is characterized in that above-mentioned individual layer sheet nonwoven is the single-layer nonwoven that is made of synthetic fibers.
According to (a 5) described air cleaner nonwoven, it is characterized in that (6) above-mentioned synthetic fibers contain the above thermal welding synthetic fibers of 50 quality %.
(7) according to (a 6) described air cleaner nonwoven, it is characterized in that, above-mentioned sheet nonwoven is made of such single-layer nonwoven, promptly, short fiber segment (chop) (cut off long fibre and get) is passed through that dry type is copied paper conversion and the individual layer tablet that forms uniform density, this individual layer tablet is implemented to make its thermal welding synthetic fibers hot melt fetch the heat treatment of density in the regulating course, thereby, make in this individual layer tablet, an above-mentioned skin section forms low-density portion, another skin section forms high density portion, comprises that the intermediate layer portion ground between two skin section is formed with in thickness direction upper density continually varying density gradient from a skin section to another skin section.
(8) a kind of air of internal combustion engine imports and uses air cleaner, and it is made of with nonwoven each described air cleaner in the item of above-mentioned (1) item～(7).
(9) a kind of air cleaner manufacture method of nonwoven, this manufacture method is made each described air cleaner nonwoven in the item of above-mentioned (1) item～(8), it is characterized in that, comprise following operation: form the operation of individual layer tablet, utilize the air lay mode to containing of thermal welding synthetic fibers proportional for more than the 50 quality % of whole fibers, fibre length is that the short fiber segment of 1～8mm is copied paper and handled; Heat treatment step, by above-mentioned individual layer tablet enforcement heat treatment being made the thermal welding of above-mentioned thermal welding synthetic fibers, thereby make in the individual layer tablet, an above-mentioned skin section is a low-density portion, another skin section is a high density portion, comprises that the intermediate layer portion ground between two skin section is formed with density continually varying density gradient layer from a skin section to another skin section.
(10) according to the method for (9) described manufacturing air cleaner with nonwoven, it is characterized in that, the operation that forms above-mentioned individual layer tablet is the operation that forms the individual layer tablet of uniform density, above-mentioned heat treatment step is such processing, promptly, heat the individual layer tablet of above-mentioned uniform density with air flow dryer, thereby make the individual layer tablet between two warm-up mills of different temperatures, heat pressurization with different temperature, and then be formed on the layer that has density gradient on the thickness direction by this back side, individual layer tablet surface.
By the nonwoven with the density continually varying layer from a skin section to another skin section of the present invention is used as nonwoven fabric for filter, can form the air cleaner that capture function is good, the life-span is long of dust, mist.In addition, air cleaner of the present invention also have with nonwoven can be by single fibrous raw material, utilize 1 machine, make such advantage by 1 raw material supplying.
Description of drawings
Fig. 1 is the figure that the cross-section photograph by nonwoven of the present invention constitutes.
Fig. 2 is the figure that is made of the cross-section photograph of catching the nonwoven behind the dust.
The specific embodiment
Below, air cleaner of the present invention is specifically described with nonwoven.Nonwoven fabric for filter of the present invention be by as the skin section of the one side side of low-density portion through the high density portion of intermediate layer portion to the another side side, along density continually varying single-layer nonwoven in the thickness direction layer, therefore, this nonwoven can constitute the filter that capture rate, the pressure loss and the filter life of dust average out, and they are different with a plurality of layers of nonwoven that forms the lit-par-lit structures that ground, interfaces connects on thickness direction.
Nonwoven of the present invention is being used as under the situation of air cleaner, can from the air that the face from the low-density portion side (asperities layer side) of monolayer constructions will nonwoven described later imports, catch bigger dust, the mist of particle in low-density portion side, in the nonwoven layer of densification gradually, catch dust, mist that the high density portion towards opposition side diminishes gradually reliably; The nonwoven of aforesaid monolayer constructions will has continuous density gradient from low-density portion to high density portion.Like this, utilization has the monolayer constructions will of continuous density gradient on thickness direction, can not occur in nonwoven and be phenomenon that produced, that in a plurality of layers interface, pile up dust, mist under the situation by a plurality of layers of different air cleaner nonwoven that forms of density, therefore, can alleviate the reduction of whole nonwoven, play the effect that can prolong filter life through the capturing efficiency of the dust that produced behind the certain hour, mist.
As the air cleaner that dust free room or automobile engine etc. is adopted, air cleaner nonwoven of the present invention is that adopted weight per unit area is 150～400g/m after the processing of overvoltage pleat
2, Air permenbility is 20～80cc/cm
2The nonwoven of/sec..At this, the numerical value of Air permenbility is the numerical value of utilization by the Air permenbility of the assay method mensuration of A method (Fu Leizeshi densometer) (the Frazier TyPe Air Permeability Tester) defined of JIS-L-1906.
Nonwoven of the present invention is the nonwoven that is formed with the individual layer of continuous density gradient on thickness direction.At this, the meaning of individual layer is not the structure that is bonded after instigating a plurality of layers to be formed separately, and neither refer to different raw materials a plurality of layers of different structures that stacks gradually and form.Promptly, its meaning is meant such layer structure: adopt identical raw material, in paper machine, utilize 1 raw material supplying to form tablet, in operation subsequently, the skin section that forms one side is a low-density portion, the skin section of another side is a high density portion, by the layer structure of a skin section side through intermediate layer density gradient of the state that changes continuously of density to the layer of another skin section side.
Low-density portion in the nonwoven of the present invention and the ratio of the density values of high density portion can correspondingly change with the performance that requires as the different purposes of air cleaner according to nonwoven in good time.
The density of low-density portion is 0.01～0.13g/cm
3, be preferably 0.06～0.13g/cm
3, the density of high density portion is 0.15～0.35g/cm
3, be preferably 0.17～0.35g/cm
3Scope, the density of high density portion is preferably 1.5～15 times of density of low-density portion.In the density of low-density portion less than 0.01g/cm
3The time, the weak strength of structure, and most particle all can pass through low-density portion, therefore unsatisfactory.In the density of low-density portion greater than 0.13g/cm
3The time, the pressure loss and possibility of jamming increase.
In addition, in the density of high density portion less than 0.15g/cm
3The time, can't fully catch less particle, at it greater than 0.35g/cm
3The time, the pressure loss, possibility of jamming increase.
As whole nonwoven, averag density is preferably 0.1～0.25g/cm
3
Air cleaner of the present invention is meant from a side surface to thickness direction 1/3 skin section with the meaning of the low-density portion in the nonwoven.In addition, the meaning of high density portion be meant from the surface of low-density portion opposition side skin section to thickness direction 1/3.The density measurement of each skin section is carried out according to assay method described later.
The meaning of " density changes continuously " among the present invention is meant, any skin section from the skin section of the skin section of low-density side and high density side through the intermediate layer to another skin section, density raises continuously or reduces continuously, only otherwise have that density has the ladder difference and position jumpy in the layer, even the then local position that exists in the constant layer of thickness direction upper density is also harmless.Owing to be the nonwoven that in layer, is formed with the monolayer constructions will of this density gradient, therefore, the position that in layer, does not exist dust, mist to concentrate savings, can be on thickness direction in certain position whole layer ground catch dust, mist.The non-permeability of dust of the filter of structure of the present invention is good more than satisfying, and the possibility that the dust that temporarily captures sees through in the air of fluctuation is also lower.
Under the situation of the air cleaner that automobile is used, in order to supply with necessary air to engine, the Air permenbility of nonwoven fabric for filter requires greater than 20cc/cm
2/ sec., but because the bigger nonwoven of Air permenbility is difficult to catch particulate, therefore, be also to can be used under the situation of nonwoven of automobile at nonwoven of the present invention, its Air permenbility is preferably 20～80cc/cm
2/ sec..
But in fact when air under the state of exerting pressure to the air supply side flowed, air permeance resistance was inevitable, therefore, for nonwoven of the present invention, by the value of the air permeance resistance of JIS-1612-8 defined, was 2.5～3.0 (KPa) preferably.Its less than 2.5 situation under, might exist the aperture bigger run through part, when existing this to run through part, can't catch bigger particle, therefore unsatisfactory.In addition, greater than 3.0 o'clock, the energy loss that is caused by the pressure loss increases, and was therefore unsatisfactory at it.
The maximum diameter of hole of nonwoven of the present invention is preferably 30～120 μ m, is preferably 60～80 μ m especially.Utilizing in the nonwoven that needle point method makes of selling on the market, the maximum diameter of hole is generally 120～150 μ m, therefore, exists the non-permeability of dust to estimate relatively poor tendency, but employing the present invention can be set in the maximum diameter of hole in the scope of 60～80 good μ m of the non-permeability of dust.
The minimum-value aperture is preferably 0.5～15 μ m.During less than 0.5 μ m, it is big that the pressure loss becomes at it, is easy to produce and stops up, and during greater than 15 μ m, the seizure performance of minuteness particle reduces, and is therefore unsatisfactory at it.
Consider that from the aspect of hear resistance, cold resistance, resistance to chemical reagents, oil resistivity etc. above-mentioned nonwoven fabric for filter of the present invention is preferably synthetic fibers system.As synthetic fibers, can adopt any materials according to situation.For example, can list polyethylene (PE), polypropylene polyolefin series fibers such as (PP), PETG (PET) fiber, Fypro etc.In addition, the composite fibre that can use the synthetic resin that fusing point is different to combine.As the resin combination of composite fibre, can illustration as PE/PP, PE/PET, PP/PET etc. with material that resin combination not of the same race forms.In addition, also can be the resin combination of the different same kind of fusing point as low-melting point PET/PET, low melting point PP/PP etc.In addition, have side that the spinning arranged side by side of different resins the is formed core-sheath-type composite fibre (also claiming core-skin layer composite fibre) that forms as spinning medially as the outside, resin with high melting point of type composite fibre and low-melting-point resin etc. side by side in composite fibre, they all can use.Consider that from the aspect that is easy to recycle expectation is made of the composite fibre of the different same kind resin of fusing point.
In addition, the fiber number of the synthetic fibers that use among the present invention is desirably in the scope of 0.1～72dtex.
Paying under the situation of anti-flammability, can adopt the raw material of the thermal welding fiber of anti-flammability as nonwoven.In addition, also can application of liquid shape fire proofing, contain powdery flame retardent.
In nonwoven fabric for filter of the present invention, can be in the scope of not damaging aim of the present invention the mixed function fiber.For example, improve at needs under the situation of deodorization of filter, can also pay the absorbability of this nonwoven with odour component by mixed active carbon fiber in nonwoven, this nonwoven that has mixed activated carbon fiber also has the adsorption capacity of NOx, SOx composition simultaneously.
As the mode of making nonwoven of the present invention, because to be manufactured on thickness direction upper density continually varying porous plastid is purpose, therefore, employing be that the method that dry type is copied paper is carried out in the short fiber segment, do not adopt the mode of the such manufacturing nonwoven fabric of long fibers of spun-bond process, meltblown.Under the situation of nonwoven fabric of long fibers, there be the fibre axis direction tendency parallel with in-plane, be easy to form face with density ladder difference, but when adopting staple fiber nonwoven fabric, the fibre axis of significant proportion is towards thickness direction, therefore, utilize method as described below, be easy to make density on thickness direction, to change continuously.
Nonwoven of the present invention utilizes following so-called air lay method to make, that is, short fiber is dropped on the continued operation line of advancing from the raw material supplying machine, forms the fiber tablet, then fiber is engaged with each other.In order on the continued operation line, to keep fiber, emit thin paper from reel in advance usually, on it, supply with short fiber.Be processed into the method for non-woven fabric plate as the fiber tablet that will form, existence is made raw material self method of thermal welding fiber, scatters the method for adhesive from the surface or is mixed as the method for the thermal welding fiber of binder particles or adhesive fiber in advance raw material etc., its any all can.
Scattering the method for adhesive,, can form density continually varying layer from low-density portion to high density portion by supplying with in amount of binder continually varying mode on thickness direction from the surface.
Under the situation that the fiber that will not have thermal welding and thermal welding fiber mix, preferably with more than the 50 quality % that account for whole fibers, contain the thermal welding fiber in the ratio as " main component " qualitatively.Under the situation of thermal welding fiber less than 50 quality %, there is the not possibility rising of the nonwoven of bondable fibers in formation, and is therefore unsatisfactory.The thermal welding fiber preferably contains more than the 80 quality %, more preferably contains more than the 90 quality %.
The method of the easiest making nonwoven of the present invention is as follows: form tablet under the situation of thermal welding fiber more than 50 quality % of whole raw fibres or raw fibre, utilize air flow dryer heating tablet, make tablet by pushing between two pressure rollers, make non-woven fabric plate.
In the method, when carrying out the hot blast heating, by to from the hot blast of tablet surface element side with pay temperature difference from the hot blast of back of the body facing side or to paying temperature difference with the pressure roller that photons contacts with back layer, make that a skin section is a low-density portion, another skin section is a high density portion, thereby can be formed in density continually varying nonwoven layer between two top layers.In addition, as required, blow the lower air of temperature or blow steam by photons (low-density portion side), make the further low-densityization of low-density side thereby also can utilize the power of air or steam to enlarge fibre gap to the tablet that is formed with low-density portion and high density portion.
Embodiment
Below, describe the present invention in detail according to embodiment.The fiber that uses in following examples etc. is as follows." thermal welding fiber 1 ": PET/PET core/sheath type composite fibre, fibre length 5mm, fibre diameter 2.2dtex (trade name " tetorn (tetoron) ", Supreme Being people's fiber limited company system); " thermal welding fiber 2 ": PET/PET core/sheath type composite fibre, fibre length 5mm, fibre diameter 4.4dtex (trade name " Melty ", You Nijia fiber Co., Ltd system); " thermal welding fiber 3 ": PET/PET core/sheath type composite fibre, fibre length 5mm, fibre diameter 22dtex (trade name " Melty ", You Nijia fiber Co., Ltd system).
Embodiment 1
The thin paper of on the ring network trellis conveyer belt of advancing, emitting weight per unit area 14g/m2, thereon with 1: 1 quality thermal welding fiber 1 and the thermal welding fiber 2 more different than composite fibre diameter, utilize the tablet forming machine of air lay mode to make raw fibre and the air stream that even hybrid modulation forms in air together fall accumulation, form tablet.
Then, make the ventilation dryer of the tablet of formation by 150 ℃ of temperature, making tablet is that 30 ℃, the roll temperature of rear side are between 50 ℃ a pair of pressure roller and with linear load 70kgf/cm this tablet to be pushed by the roll temperature in face side, thereby makes the dry type non-woven fabric plate of weight per unit area 300g/m2, thickness 2.0mm, density 0.15g/cm3.
To press goods that pleat processes as filter 1 to the dry type non-woven fabric plate that obtains.
Embodiment 2
Utilize the method for embodiment 1, to make the dry type non-woven fabric plate of weight per unit area 300g/m2, thickness 2.0mm, density 0.15g/cm3 similarly to Example 1 with the thermal welding fiber 1 of 7: 3 mass ratio and material that thermal welding fiber 2 mixes as raw fibre.
To press goods that pleat processes as filter 2 to the dry type non-woven fabric plate that obtains.
Embodiment 3
Utilize the method for embodiment 1, to make the dry type non-woven fabric plate of weight per unit area 330g/m2, thickness 2.0mm, density 0.165g/cm3 similarly to Example 1 with the thermal welding fiber 1 of 1: 1 mass ratio and material that thermal welding fiber 2 mixes as raw fibre.
To press goods that pleat processes as filter 3 to the dry type non-woven fabric plate that obtains.
Embodiment 4
Utilize the method for embodiment 2,, make the dry type non-woven fabric plate of weight per unit area 300g/m2, thickness 2.0mm, density 0.15g/cm3 similarly to Example 2 except thermal welding fiber 2 is replaced to the thermal welding fiber 3.
To press material that pleat processes as filter 4 to the dry type non-woven fabric plate that obtains.
Embodiment 5
Utilize the method for embodiment 1, except with thermal welding fiber 2 separately as the raw fibre, make the dry type non-woven fabric plate of weight per unit area 350g/m2, thickness 2.0mm, density 0.17g/cm3 similarly to Example 1.
To press goods that pleat processes as filter 5 to the dry type non-woven fabric plate that obtains.
Embodiment 6
Utilize the method for embodiment 1, except with thermal welding fiber 1 separately as the raw fibre, make the dry type non-woven fabric plate of weight per unit area 280g/m2, thickness 2.0mm, density 0.14g/cm 3 similarly to Example 1.
To press goods that pleat processes as filter 6 to the dry type non-woven fabric plate that obtains.
Reference example 1, reference example 2
With in the past air cleaner with air cleaner (type of utilizing needle point method and acryloid cement that 3 layers of tablet are fitted and formed) as a reference example 1, with the air cleaner of improved goods with air cleaner (type of utilizing needle point method and acryloid cement that 4 layers of tablet are fitted and formed) as a reference example 2.
Measure the various rerum naturas of the nonwoven of embodiment 1～6 and reference example 1,2,8 kinds of dusts of employing JIS Z-8901 defined carry out the performance evaluation of air cleaner.The result is shown in the table 1.
In addition, the method for evaluating performance of the assay method of the various rerum naturas of the nonwoven of embodiment 1～6 and reference example 1,2 and air cleaner is as follows.
The Determination of thickness method
According to JIS L-1906,2kPa measures with load.
The assay method of density
To carry out sheet to nonwoven and handle the goods that form are taken the cross section as sample soft X exograph X, read the image that obtains with scanner, quantize each layer averag density of the skin section on the pars intermedia of the skin section of 1/3 on calculating from a side surface to thickness direction, 1/3 middle thickness, 1/3 on from the opposite side surface to thickness direction with tone is deep or light with 256 gray scales.Specifically, adopt following process.
1) sheet is handled
Utilize the terrace cut slice machine that nonwoven is made the laminar of width 20mm * thickness 2.0mm, make sample.
2) soft X line is taken
Use soft X beam generating apparatus (the special type of EMS-2, micro-system (SOFTEC) (strain) system), take the cross section of above-mentioned test material under the following conditions.
Shooting condition: large focal spot (BR) pattern, voltage 11kVp, electric current 4mA, irradiation time 5mmin.
Development conditions: developer solution 5mmin. → stop solution 30sec. → fixing solution 10mmin. dipping
3) image scanning
Use and see through the image of drum scanner instrument (Scan Densitometer2605) scanning with photographs.
Condition determination: sample interval 25 * 25 μ m, drum speed 2 commentaries on classics/sec, concentration gray scale 256.
4) the deep or light mensuration of image
Use and resolve the image that software (10Mate, (strain) must reach Tyke (I-spec) system) is resolved scanning,, obtain the mean intensity value of 19 * 0.75mm scope respectively at each layer of test material.
5) calculating of density
Prepare the known nonwoven of density (0.05～0.43g/cm3), similarly take soft X exograph X with above-mentioned, obtain calibration curve by the relation of separately density-concentration value.
Utilize described calibration curve, calculate the density of each layer by the mean concentration of sample.
The Air permenbility assay method
Utilize the A method (Fu Leizeshi densometer) (Frazier TyPe Air Permeability Tester) of the 8.27.1 of JIS L-1906 to measure.
The assay method in aperture
As sample, infiltration Sumitomo 3M corporate system fluorine is inert fluid freon FC-40, utilizes Porous Materials corporate system Automated Perm Porometer to measure with the test film of 3cm * 3cm.This device is based on the device of ASTMF-316-80.Be determined at air and carry out from the direction of low-density side direction high density side flow, number of repetition is n=5.Each mensuration all obtains bubble point and integrated flow curve.In addition, the maximum diameter of hole utilizes the bubble point method to calculate, and for convenience's sake, the aperture during with 99% flow under the situation of the liquid that do not infiltrate is as the minimum-value aperture.
The air permeance resistance assay method
Measure according to the regulation that 8. air permeance resistance of JIS D-1612 are tested, air permeance resistance is estimated with following benchmark.As metewand, numerical value was ◎ less than 2.5 o'clock, numerical value more than or equal to 2.5, less than 3.0 o'clock be zero, numerical value more than or equal to 3.0, less than 3.5 o'clock be Δ, numerical value more than or equal to 3.5 o'clock be *.
The evaluation method of initial cleaning efficiency
Test is 8 kinds (particulates) of JIS Z-8901 defined with dust, according to the regulation of the initial cleaning efficiency test of the 9.4. (1) of JISD-1612 it is measured.
As metewand, numerical value is more than or equal to being evaluated as ◎ at 98.5 o'clock, and numerical value is evaluated as zero less than 98.5, more than or equal to 98.0 o'clock, and numerical value is less than 98.0, more than or equal to being evaluated as Δ at 97.5 o'clock, numerical value less than be evaluated as in 97.5 o'clock *.
Life-cycle (full life)
The evaluation method of cleaning efficiency
Test is 8 kinds (particulates) of JIS Z-8901 defined with dust, measures according to the regulation that 9.4. (3) the life-cycle cleaning efficiency of JISD-1612 is tested.
As metewand, numerical value is more than or equal to being evaluated as ◎ at 99.0 o'clock, and numerical value is evaluated as zero less than 99.0, more than or equal to 98.5 o'clock, and numerical value is less than 98.5, more than or equal to being evaluated as Δ at 98.0 o'clock, numerical value less than be evaluated as in 98.0 o'clock *.
The evaluation method of dust maintenance dose
Test is 8 kinds (particulates) of JIS Z-8901 defined with dust, measures according to the regulation that the 10. dust maintenance doses of JISD-1612 are tested.
According to company's inner evaluation benchmark, " good " is designated as ◎, and " well " is designated as zero, and " slightly poor " is designated as Δ, and " poor " be designated as *.
The evaluation method of the non-permeability of dust
Make airwaves, the test that captures sees through the ratio of filtering material with dust.
Numerical value was evaluated as zero less than 1.0 o'clock, and numerical value is more than or equal to 1.0, less than being evaluated as Δ at 2.0 o'clock, numerical value more than or equal to be evaluated as in 2.0 o'clock *.
Table 1
(videing infra)
Industrial applicibility
Nonwoven fabric for filter of the present invention is the long air cleaner member of life-span of keeping higher capture rate in can be between longer-term, can make at an easy rate, therefore, not only can be used for the air introducing port of internal combustion engine, also can be as the long-life filter of various air-conditionings.
Claims (7)
1. air cleaner nonwoven, this air cleaner nonwoven is that weight per unit area is 150～400g/m
2, be 20～80cc/cm by the Air permenbility of the A law regulation among the JIS-L-1906 of Japanese Industrial Standards
2The individual layer sheet nonwoven of/sec. is characterized in that,
This air cleaner is a low-density portion with a skin section of nonwoven, another skin section is a high density portion, comprises that the intermediate layer portion ground between two skin section has in thickness direction upper density continually varying density gradient from a skin section to another skin section.
2. air cleaner nonwoven according to claim 1 is characterized in that,
The density of above-mentioned low-density portion is 0.01～0.13g/cm3, and the density of above-specified high density portion is 0.15～0.35g/cm3, and the density of high density portion is 1.5～15 times of density of low-density portion.
3. air cleaner nonwoven according to claim 1 and 2 is characterized in that,
The maximum diameter of hole of the low-density portion of above-mentioned individual layer sheet nonwoven is 30～120 μ m.
4. air cleaner nonwoven according to claim 1 is characterized in that,
The minimum-value aperture of the high density portion of above-mentioned individual layer sheet nonwoven is 0.5～15 μ m.
5. air cleaner nonwoven according to claim 1 is characterized in that,
Above-mentioned individual layer sheet nonwoven is the single-layer nonwoven that is made of synthetic fibers.
6. air cleaner nonwoven according to claim 5 is characterized in that,
Above-mentioned synthetic fibers with the thermal welding synthetic fibers as main component.
7. air cleaner nonwoven according to claim 6 is characterized in that,
Above-mentioned sheet nonwoven is made of the single-layer nonwoven that obtains with following method, promptly, the short fiber segment is copied paper conversion through dry type and formed the individual layer tablet of uniform density, make its thermal welding synthetic fibers hot melt fetch the heat treatment of density in the regulating course to this individual layer tablet enforcement, thereby, make in this individual layer tablet, an above-mentioned skin section forms low-density portion, another skin section forms high density portion, comprises that the intermediate layer portion ground between two skin section is formed with in thickness direction upper density continually varying density gradient from a skin section to another skin section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009171471A JP5425553B2 (en) | 2009-07-22 | 2009-07-22 | Nonwoven fabric for air filter |
| JP2009-171471 | 2009-07-22 |
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| Publication Number | Publication Date |
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| CN101961580A true CN101961580A (en) | 2011-02-02 |
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| CN2010102364714A Pending CN101961580A (en) | 2009-07-22 | 2010-07-22 | The air cleaner nonwoven |
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| CN (1) | CN101961580A (en) |
Cited By (6)
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| CN109162025A (en) * | 2018-10-30 | 2019-01-08 | 山东泰鹏环保材料股份有限公司 | A kind of double milling train post forming filterings preparation method and application of gradient-structure PET melt spraying non-woven fabrics |
| CN110062649A (en) * | 2016-11-11 | 2019-07-26 | 霍林斯沃思和沃斯有限公司 | Filter medium with variable density |
| CN113215729A (en) * | 2021-05-06 | 2021-08-06 | 常州百朋纺织有限公司 | Environment-friendly dry-method framework cloth and manufacturing process thereof |
| CN113453780A (en) * | 2019-02-28 | 2021-09-28 | 富士胶片株式会社 | Liquid filter and method for manufacturing liquid filter |
| CN113597482A (en) * | 2019-03-19 | 2021-11-02 | 富士胶片株式会社 | Method for producing nonwoven fabric |
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| JP6253701B2 (en) * | 2016-04-25 | 2017-12-27 | オルガノ株式会社 | Air purification device |
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| JP2022061616A (en) * | 2020-10-07 | 2022-04-19 | 株式会社リコー | Filter holding device, developing device, process cartridge, image forming apparatus, and filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110062649A (en) * | 2016-11-11 | 2019-07-26 | 霍林斯沃思和沃斯有限公司 | Filter medium with variable density |
| CN110062649B (en) * | 2016-11-11 | 2022-06-17 | 霍林斯沃思和沃斯有限公司 | Filter media with density variation |
| CN109162025A (en) * | 2018-10-30 | 2019-01-08 | 山东泰鹏环保材料股份有限公司 | A kind of double milling train post forming filterings preparation method and application of gradient-structure PET melt spraying non-woven fabrics |
| CN109162025B (en) * | 2018-10-30 | 2021-09-28 | 山东泰鹏环保材料股份有限公司 | Preparation method and application of gradient-structure PET melt-blown non-woven fabric for double-rolling-mill secondary forming filtration |
| CN113453780A (en) * | 2019-02-28 | 2021-09-28 | 富士胶片株式会社 | Liquid filter and method for manufacturing liquid filter |
| CN113597482A (en) * | 2019-03-19 | 2021-11-02 | 富士胶片株式会社 | Method for producing nonwoven fabric |
| CN113215729A (en) * | 2021-05-06 | 2021-08-06 | 常州百朋纺织有限公司 | Environment-friendly dry-method framework cloth and manufacturing process thereof |
| CN113215729B (en) * | 2021-05-06 | 2023-01-13 | 常州百朋纺织有限公司 | Environment-friendly dry-method framework cloth and manufacturing process thereof |
| CN113930975A (en) * | 2021-09-26 | 2022-01-14 | 南通中豪超纤制品有限公司 | Composite superfine fiber bionic leather by needle punching method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5425553B2 (en) | 2014-02-26 |
| JP2011026723A (en) | 2011-02-10 |
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