CN109692525A - A kind of filtering material and its manufacturing method and purposes - Google Patents
A kind of filtering material and its manufacturing method and purposes Download PDFInfo
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- CN109692525A CN109692525A CN201710997593.7A CN201710997593A CN109692525A CN 109692525 A CN109692525 A CN 109692525A CN 201710997593 A CN201710997593 A CN 201710997593A CN 109692525 A CN109692525 A CN 109692525A
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- filtering material
- woven fabrics
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- thickness
- spun
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
- B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
-
- 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
- B01D39/1669—Cellular material
- B01D39/1676—Cellular material of synthetic origin
-
- 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
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
Abstract
The present invention discloses a kind of filtering material and its manufacturing method and purposes, the filtering material includes spun-bonded non-woven fabrics fid layer, polytetrafluoroethylporous porous membrane layer, the polytetrafluoroethylporous porous membrane layer is that air flows into surface layer, the thickness deviation values of the filtering material are within ± 25%, and the averag density of filtering material is 0.20~0.50g/cm3.Filtering material of the invention has the characteristics that arresting efficiency is high, gas permeability is high, crushing is low, can be applied to field of air filtration.
Description
Technical field
The present invention relates to a kind of filtering material and its manufacturing methods and purposes.
Background technique
Use currently on the market the filtering material that is made of polytetrafluoroethylene film and spun-bonded non-woven fabrics supporting layer as
Filter, the filter are applied in filtered-air environment, such as the laboratory of scientific research field, electronics, communication equipment it is dust-proof etc.,
To filter out the particulate matter in air.Currently, what the filtering material in common filter generated air there are itself
The defects of resistance is larger, air capture efficiency is bad, air permeability is small.
Therefore, in order to solve this problem, have currently on the market by being modified processing to polytetrafluoroethylene film,
Its air permeability is controlled, and then adjusts the running resistance of filtering material, although reduction running resistance can be reached by this method
With the purpose for the air permeability for increasing filtering material, but the trapping of filtering material is caused to be imitated due to the increase of air permeability at the same time
Rate is but substantially reduced.
Have that arresting efficiency is higher, and the pressure loss is lower as disclosed one kind in Chinese publication CN102946968A,
And the filter material of the biggish perforated membrane of dust quantity is protected, which is to reduce air by being modified processing to polytetrafluoroethylene film
The pressure loss of filter screen.Although the patent can achieve in this way reduces the purpose that operating pressure loses, but by
In the porosity of modified Teflon perforated membrane is excessively high, the arresting efficiency of filtering material is but reduced.
Summary of the invention
The purpose of the present invention is to provide a kind of arresting efficiency height, the filtering material and its manufacture that air permeability is high, crushing is low
Method.
Filtering material of the invention includes spun-bonded non-woven fabrics fid layer, polytetrafluoroethylporous porous membrane layer, the polytetrafluoro
Ethylene porous membrane layer is that air flows into surface layer, and the thickness deviation values of the filtering material are within ± 25%, and filtering material is averaged
Density is 0.20~0.50g/cm3。
Above-mentioned spun-bonded non-woven fabrics fid layer is preferably made of Nonwoven Cloth of Long Polyester Fibres.
Above-mentioned polytetrafluoroethylporous porous membrane with a thickness of 5~15 μm.
At pressure 200Pa, the air permeability of filtering material of the present invention preferably 50.0~100.0L/cm2/min。
The arresting efficiency of filtering material of the present invention preferably 99.9000% or more.
The beneficial effects of the present invention are: the present invention solves previous filtering material air permeability height and arresting efficiency height cannot be same
When there are the problem of, and the present invention flows into face using polytetrafluoro as the supporting layer of filtering material, air using spun-bonded non-woven fabrics
Filter layer of the vinyl film as filtering material, thickness and density by controlling filtering material are made in a certain range
The filtering material obtained has the characteristics that air permeability is high, arresting efficiency is high, crushing is low.Filtering material of the invention can be applied to air
In filtration art.
Specific embodiment
Filtering material of the invention includes spun-bonded non-woven fabrics fid layer, polytetrafluoroethylporous porous membrane layer, the polytetrafluoro
Ethylene porous membrane layer is that air flows into surface layer, and the thickness deviation values of the filtering material are within ± 25%, and filtering material is averaged
Density is 0.20~0.50g/cm3.In view of because of the variation of wind speed biggish deformation does not occur for filtering material in deduster,
It is required that filtering material itself has a degree of rigidity, with needle punched non-woven fabrics, spunlace non-woven cloth, melt spraying non-woven fabrics and woven fabric
It compares, since spun-bonded non-woven fabrics have higher rigid softness, can be used as the supporting layer of filtering material of the present invention.If using
The non-woven fabrics of other materials, such as melt spraying non-woven fabrics, chemical adhesion non-woven fabrics, is meltblown nothing due to constituting as fid layer
The fiber of woven fabric is thinner, arranges closely between fiber and fiber, and gap is smaller between fiber and fiber, saturating required by being not achieved
Manner, in this way with polytetrafluoroethylene (PTFE) more than empty film be bonded after filtering material air permeability it is low, and requirement is not achieved；It is another
The fibre diameter of aspect melt spraying non-woven fabrics is small, and the rigid softness of obtained non-woven fabrics is low, so as to cause the rigid softness of final filtration material
It is low.If adhesive will certainly be used using chemical adhesion non-woven fabrics, using the chemical adhesion non-woven fabrics of adhesive as support
After material, due to actual use during chemical adhesive may go bad, fall off phenomena such as, influence integral filter material
Arresting efficiency and service life.
Due to polytetrafluoroethylporous porous film have it is ultra-thin it is light, membrane pore structure is uniform and stable, porosity is high, resistance is small,
The advantages that arresting efficiency is high, and polytetrafluoroethylene (PTFE) is with inoxidizability is strong, thermal stability is high, hydrophobicity is good and flame retardancy is excellent
Feature.And polytetrafluoroethylporous porous membrane is a kind of gas separation membrane material of function admirable, therefore by polytetrafluoroethylstephanoporate stephanoporate
The strainability of filtering material can be improved as air filtration surface layer in film layer.
The average thickness of filtering material of the present invention is 0.30~0.60mm.If under the conditions of same grammes per square metre, if filtering
If the average thickness of material is greater than 0.6mm, resulting filtering material arresting efficiency is low, and it is bad that there are strainabilities, for a long time
It is easy blocking using rear filtering material, energy consumption is caused to increase；If the average thickness of filtering material is less than 0.3mm, polytetrafluoro
Ethylene perforated membrane and support are laminated too dead, although improving the arresting efficiency of filtering material, air permeability is reduced, resistance rises.
In view of the air permeability of filtering material, arresting efficiency and resistance, the average thickness of the filtering material is preferably 0.40~
0.50mm。
The thickness deviation values of filtering material of the present invention within ± 25%, if under the conditions of same grammes per square metre, if filter material
If the thickness deviation values of material are greater than ± 25%, the object that is captured is easy to pass through from thin, and resulting filtering material arresting efficiency is low,
It is bad that there are strainabilities, and resin readily permeable above-mentioned filtering material when molding, causes final yield rate low, in cost
It rises；If the thickness deviation values of filtering material are less than 25%, resulting filtering material arresting efficiency, air permeability, resistance are more steady
It is fixed, it is contemplated that arresting efficiency, air permeability and the resistance of filtering material, the thickness deviation values of the filtering material are preferably ± 15%
Within.
The averag density of filtering material of the present invention is 0.20~0.50g/cm3.If under the conditions of same grammes per square metre, filtering
The averag density of material is greater than 0.50g/cm3If, the supporting layer and polytetrafluoroethylporous porous membrane pressure for constituting filtering material are too
Extremely, although improving the arresting efficiency of filtering material, air permeability is substantially reduced, resistance rises；If filtering material is flat
Equal density is less than 0.20g/cm3If, the arresting efficiency of resulting filtering material is low, and it is bad that there are strainabilities, makes for a long time
With rear easy blocking, energy consumption is caused to increase.In view of the air permeability of filtering material, arresting efficiency and resistance, the filtering material
Averag density preferably 0.26~0.34g/cm3。
The aperture of above-mentioned polytetrafluoroethylporous porous membrane is at 5 μm or less and porosity is 90% or more, makes filter material obtained
Material, which has, breathes freely greatly, while strainability is also more excellent.Filtering material of the invention is due to using in filtration art, it is necessary to meet
High arresting efficiency, so the pore size for the polytetrafluoroethylporous porous membrane being used in the present invention is at 5 μm hereinafter, if poly- four
If the aperture of fluoride porous film is excessive, big powder dust particle is bound to easily through polytetrafluoroethylporous porous membrane so that mistake
The arresting efficiency of filter material material reduces.
Preferably 5~15 μm of the thickness of polytetrafluoroethylporous porous membrane in conducting filtration material of the present invention.If polytetrafluoroethylene (PTFE)
If the thickness of perforated membrane is excessively thin, due to the characteristic of polytetrafluoroethylporous porous membrane itself, film is thinner to polytetrafluoroethylporous porous membrane
Fitting processing it is more difficult, be easy to cause polytetrafluoroethylporous porous membrane damaged, in addition to this, during use, thin is poly-
Tetrafluoroethene perforated membrane is during, use, more cracky, to not have the effect of filtering；And if polytetrafluoroethylene (PTFE)
It if the thickness of perforated membrane is blocked up, is not stretched well between the fibrinogen of polytetrafluoroethylporous porous membrane, such poly- four
Fluoride porous film gap is smaller, and node is more, although film strength may improve, polytetrafluoroethylporous porous membrane it is saturating
Manner reduces, and causes the resistance of final filtering material obtained to become larger, to increase the load of deduster.In view of this filtering
Material actual use in air permeability the problem of and production cost problem, the thickness of the polytetrafluoroethylporous porous membrane more preferable 6
~12 μm.
The material that spun-bonded non-woven fabrics fid layer is constituted in filtering material of the invention is Nonwoven Cloth of Long Polyester Fibres, the polyester
Continuous yarn non-woven fabrics are made by core sheath polyester fiber, and sheath fiber uses the polyester fiber of low melting point, and core fibre is higher using fusing point
Polyester fiber, with polytetrafluoroethylporous porous membrane hot pressing compound tense, polyester fiber this part of low melting point melts away, thus more preferably
Raising polytetrafluoroethylporous porous membrane fitting fastness.
Since filtering material of the present invention is used for field of air filtration, it is necessary to meet can give a discount processing and certain softness
Property, and cost problem is combined to consider, the grammes per square metre of the spun-bonded non-woven fabrics fid layer is in 200g/m2Below；In addition it considered
The environment of materials'use and the stability in use of final filter material are filtered, the grammes per square metre needs of the spun-bonded non-woven fabrics fid layer are greater than
100g/m2.Therefore, the grammes per square metre of spun-bonded non-woven fabrics fid layer is preferably 100~200g/m2, more preferable 130~150g/m2。
At pressure 200Pa, the air permeability of filtering material of the present invention preferably 50.0~100.0L/cm2/min.If ventilative
Spend it is low if, although the arresting efficiency of filtering material can be improved in this way, filtering material in the filter, certain
Under wind speed, crushing rises quickly；If air permeability is excessively high, although reducing the crushing of filtering material, it is bound in this way
Can make the arresting efficiency of filtering material reduces.In view of crushing and arresting efficiency, the air permeability of filtering material more preferable 60.0~
80.0L/cm2/min。
The arresting efficiency of filtering material of the present invention is 99.9% or more.99.9% or more filter material is maintained at by arresting efficiency
The air filter for keeping the arresting efficiency of HEPA level can be made in material.
The manufacturing method of filtering material of the present invention, comprising the following steps:
(1) fiber is by heating plate, by when give hot wind and be allowed between fiber mutually bonding and obtain spun-bonded non-woven fabrics, obtain
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again, control its thickness between 0.30~0.60mm；
(2) by spun-bonded non-woven fabrics wherein one side and polytetrafluoroethylporous porous membrane temperature be 160~230 DEG C at carry out hot pressing
It is compound, final finished product.
The spun-bonded non-woven fabrics caliper uniformity obtained described in above-mentioned steps (1) is high, so that its air permeability homogeneity is high, such as
The spun-bonded non-woven fabrics that fruit is obtained using common processing methods are limited, obtained thickness as supporting layer by processing method is placed in
It spends inhomogenous, causes air permeability inhomogenous, the arresting efficiency and crushing difference of the filtering material prepared by are big, and performance is uniform
Property is poor.
Spun-bonded non-woven fabrics described in above-mentioned steps (2) and polytetrafluoroethylporous porous membrane in the case where temperature is 160~230 DEG C
It is compound to carry out hot pressing, if hot pressing compound tense temperature is lower than 160 DEG C, the compound required energy of polytetrafluoroethylporous porous membrane is not achieved
Amount, so that the fitting fastness of final polytetrafluoroethylporous porous membrane is low, causes the service life of integral filter material to reduce；If
If hot pressing compound tense temperature is higher than 230 DEG C, the core sheath fibers flattening to form spun-bonded non-woven fabrics layer is made in recombination process, from
And the air permeability of integral filter material is caused to reduce, the running resistance that certainly will will lead to filter material in last use increases, and increases
Add filtering cost.
By following embodiment, the invention will be further described.But protection scope of the present invention is not limited to embodiment,
Each physical property in embodiment is measured by following method.
[grammes per square metre]
Filtering material is cut into the square of 200 × 200mm, calculates the grammes per square metre of filtering material from weight, average measurement 3 times,
Final result takes 3 average value.
[thickness]
Using the thickness of thickness amesdial (extruding force 0.000245Pa) measurement filtering material, measurement size is 1m × 1m's
Filtering material prolongs laterally 10 points of measurement, and longitudinal 10 points of measurement selects be measured altogether at 100 points, finds out average value.
[thickness deviation values]
Using the thickness of thickness amesdial (extruding force 0.000245Pa) measurement filtering material, measurement size is 1m × 1m's
Filtering material prolongs laterally 10 points of measurement, and longitudinal 10 points of measurement selects 100 points of thickness altogether, is calculated by the following formula and obtains
Thickness deviation values,
Positively biased difference=(maximum value-average value) ÷ average value,
Negative bias difference=(minimum value-average value) ÷ average value.
[density]
The weight that the filtering material of unit area is weighed using weighing instrument is surveyed using thickness amesdial (extruding force 0.000245Pa)
The thickness for determining the filtering material of unit area is calculated by the following formula and obtains density, density=weight ÷ (area × thickness).
[air permeability]
Based on the Air permenbility of the measurement filtering material of permeability test method as defined in JIS L 1913, measurement site randomly chooses at 10 points
It is measured.
[arresting efficiency]
Arresting efficiency based on the measurement filtering material of arresting efficiency method of testing as defined in JIS B 9908.
[resistance]
Resistance based on the measurement filtering material of resistance measurement method as defined in JIS B 9908.
Embodiment 1
(1) preparation of spun-bonded non-woven fabrics fid layer: by polyester fiber by heating plate, by when give hot wind and make polyester fiber
Between mutually melt, obtain grammes per square metre be 130g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.31mm, then above-mentioned polyester is spun
Bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 118.2L/cm2/ min, the polytetrafluoroethylporous porous membrane with a thickness of 8 μm is compound, then carries out hot pressing at being 180 DEG C in temperature and answer
Conjunction makes its integration, final to be made with a thickness of 0.31mm, thickness deviation values in ± 20%, grammes per square metre 130g/m2, density be
0.42g/cm3, air permeability 70.5L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material
Flowing into surface layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.
Each physical property of filtering material of the present invention is referring to table 1.
Embodiment 2
(1) preparation of spun-bonded non-woven fabrics fid layer: by polyester fiber by heating plate, by when give hot wind and keep polyester fine
Mutually melt between dimension, obtaining grammes per square metre is 130g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.45mm, then by above-mentioned polyester
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 118.2L/cm2/ min, the polytetrafluoroethylporous porous membrane with a thickness of 8 μm is compound, then carries out hot pressing at being 180 DEG C in temperature and answer
Conjunction makes its integration, final to be made with a thickness of 0.45mm, thickness deviation values in ± 20%, grammes per square metre 132g/m2, density be
0.29g/cm3, air permeability 88.1L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material
Flowing into surface layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.
Each physical property of filtering material of the present invention is referring to table 1.
Embodiment 3
(1) preparation of spun-bonded non-woven fabrics fid layer: by polyester fiber by heating plate, by when give hot wind and keep polyester fine
Mutually melt between dimension, obtaining grammes per square metre is 130g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.48mm, then by above-mentioned polyester
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 121.5L/cm2/ min, the polytetrafluoroethylporous porous membrane with a thickness of 6 μm is compound, then carries out hot pressing at being 180 DEG C in temperature and answer
Conjunction makes its integration, final to be made with a thickness of 0.48mm, thickness deviation values in ± 20%, grammes per square metre 135g/m2, density be
0.28g/cm3, air permeability 65.1L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material
Flowing into surface layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.
Each physical property of filtering material of the present invention is referring to table 1.
Embodiment 4
(1) preparation of spun-bonded non-woven fabrics fid layer: by polyester fiber by heating plate, by when give hot wind and keep polyester fine
Mutually melt between dimension, obtaining grammes per square metre is 130g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.56mm, then by above-mentioned polyester
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 112.7L/cm2/ min, it is compound with a thickness of 14 μm of polytetrafluoroethylporous porous membranes, then temperature be 210 DEG C at carry out hot pressing it is compound
Make its integration, it is final to be made with a thickness of 0.56mm, thickness deviation values in ± 20%, grammes per square metre 141g/m2, density 0.25g/
cm3, air permeability 52.6L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material flows into face
Layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.The present invention
Each physical property of filtering material is referring to table 1.
Embodiment 5
(1) preparation of spun-bonded non-woven fabrics fid layer: by polyester fiber by heating plate, by when give hot wind and keep polyester fine
Mutually melt between dimension, obtaining grammes per square metre is 150g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.45mm, then by above-mentioned polyester
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 118.2L/cm2/ min, it is compound with a thickness of 8 μm of polytetrafluoroethylporous porous membranes, then temperature be 180 DEG C at carry out hot pressing it is compound
Make its integration, it is final to be made with a thickness of 0.45mm, thickness deviation values in ± 20%, grammes per square metre 154g/m2, density 0.34g/
cm3, air permeability 87.4L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material flows into face
Layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.The present invention
Each physical property of filtering material is referring to table 1.
Embodiment 6
(1) preparation of spun-bonded non-woven fabrics fid layer: by polyester fiber by heating plate, by when give hot wind and keep polyester fine
Mutually melt between dimension, obtaining grammes per square metre is 150g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.56mm, then by above-mentioned polyester
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 118.2L/cm2/ min, it is compound with a thickness of 8 μm of polytetrafluoroethylporous porous membranes, then temperature be 180 DEG C at carry out hot pressing it is compound
Make its integration, it is final to be made with a thickness of 0.56mm, thickness deviation values in ± 20%, grammes per square metre 158g/m2, density 0.28g/
cm3, air permeability 54.2L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material flows into face
Layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.The present invention
Each physical property of filtering material is referring to table 1.
Embodiment 7
(1) preparation of spun-bonded non-woven fabrics fid layer: by polyester fiber by heating plate, by when give hot wind and keep polyester fine
Mutually melt between dimension, obtaining grammes per square metre is 130g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.45mm, then by above-mentioned polyester
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 99.4L/cm2/ min, the polytetrafluoroethylporous porous membrane with a thickness of 20 μm is compound, then carries out hot pressing at being 180 DEG C in temperature and answer
Conjunction makes its integration, final to be made with a thickness of 0.45mm, thickness deviation values in ± 20%, grammes per square metre 133g/m2, density be
0.30g/cm3, air permeability 10.2L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material
Flowing into surface layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.
Each physical property of filtering material of the present invention is referring to table 1.
Embodiment 8
(1) preparation of spun-bonded non-woven fabrics fid layer: by polyester fiber by heating plate, by when give hot wind and keep polyester fine
Mutually melt between dimension, obtaining grammes per square metre is 130g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.45mm, then by above-mentioned polyester
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 118.2L/cm2/ min, the polytetrafluoroethylporous porous membrane with a thickness of 8 μm is compound, then carries out hot pressing at being 180 DEG C in temperature and answer
Conjunction makes its integration, final to be made with a thickness of 0.45mm, thickness deviation values in ± 25%, grammes per square metre 132g/m2, density be
0.29g/cm3, air permeability 100.4L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material
Flowing into surface layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.
Each physical property of filtering material of the present invention is referring to table 1.
Embodiment 9
(1) preparation of spun-bonded non-woven fabrics fid layer: by polyester fiber by heating plate, by when give hot wind and keep polyester fine
Mutually melt between dimension, obtaining grammes per square metre is 130g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.45mm, then by above-mentioned polyester
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 118.2L/cm2/ min, the polytetrafluoroethylporous porous membrane with a thickness of 8 μm is compound, then carries out hot pressing at being 180 DEG C in temperature and answer
Conjunction makes its integration, final to be made with a thickness of 0.45mm, thickness deviation values in ± 15%, grammes per square metre 132g/m2, density be
0.29g/cm3, air permeability 89.2L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material
Flowing into surface layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.
Each physical property of filtering material of the present invention is referring to table 1.
Comparative example 1
By polyester fiber by heating plate, by when give hot wind and make mutually to melt between polyester fiber, obtaining grammes per square metre is 130g/
m2, with a thickness of the spunbond polyester non-woven fabrics of 0.45mm, then by above-mentioned spunbond polyester non-woven fabrics again in the ribbon of two panels heating
Between pass through, it is final to be made with a thickness of 0.45mm, thickness deviation values in ± 20%, density 0.29g/cm3, air permeability be
681.1L/cm2The filtering material of/min.Each physical property of the filtering material is referring to table 2.
Comparative example 2
(1) preparation of spun-bonded non-woven fabrics fid layer: by polyester fiber by heating plate, by when give hot wind and keep polyester fine
Mutually melt between dimension, obtaining grammes per square metre is 130g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.90mm, then by above-mentioned polyester
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 118.2L/cm2/ min, it is compound with a thickness of 8 μm of polytetrafluoroethylporous porous membranes, then temperature be 200 DEG C at carry out hot pressing it is compound
Make its integration, it is final to be made with a thickness of 0.90mm, thickness deviation values in ± 20%, grammes per square metre 130g/m2, density 0.14g/
cm3, air permeability 104.4L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material flows into face
Layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.The filtering
Each physical property of material is referring to table 2.
Comparative example 3
(1) preparation of spun-bonded non-woven fabrics fid layer by polyester fiber by heating plate, by when give hot wind and make polyester fiber
Between mutually melt, obtain grammes per square metre be 150g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.45mm, then above-mentioned polyester is spun
Bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 118.2L/cm2/ min, it is compound with a thickness of 8 μm of polytetrafluoroethylporous porous membranes, then temperature be 180 DEG C at carry out hot pressing it is compound
Make its integration, it is final to be made with a thickness of 0.15mm, thickness deviation values in ± 20%, grammes per square metre 156g/m2, density 1.04/
cm3, air permeability 21.1L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material flows into face
Layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.The filtering
Each physical property of material is referring to table 2.
Comparative example 4
(1) preparation of spun-bonded non-woven fabrics fid layer by polyester fiber by heating plate, by when give hot wind and make polyester fiber
Between mutually melt, obtain grammes per square metre be 130g/m2, with a thickness of the spunbond polyester non-woven fabrics of 0.45mm, then above-mentioned polyester is spun
Bonded non-woven fabrics pass through between the ribbon of two panels heating again；
(2) preparation of filtering material: by the one side and air permeability of spunbond polyester non-woven fabrics fid obtained in above-mentioned steps (1)
For 118.2L/cm2/ min, it is compound with a thickness of 8 μm of polytetrafluoroethylporous porous membranes, then temperature be 180 DEG C at carry out hot pressing it is compound
Make its integration, it is final to be made with a thickness of 0.45mm, thickness deviation values in ± 30%, grammes per square metre 132g/m2, density 0.29g/
cm3, air permeability 63.2L/cm2The filtering material of/min.According to the sequence of ingress of air, the air of the filtering material flows into face
Layer is polytetrafluoroethylporous porous membrane layer, the double-layer structure that air effluent face layer is spunbond polyester non-woven fabrics fid layer.The filtering
Each physical property of material is referring to table 2, and the above-mentioned filtering material in final product is by resin penetration.
Table 1
Table 2
。
According to above-mentioned table: (1) by embodiment 1,2 it is found that the thickness of filtering material is in preferred scope under equal conditions
Words, the air permeability of resulting filtering material, arresting efficiency is higher than the former, resistance is low.
(2) by embodiment 2,8,9 it is found that the thickness deviation values of filtering material are big in embodiment 8, gained under equal conditions
Filtering material arresting efficiency it is low.
(3) by embodiment 5,6 it is found that the thickness of filtering material is in preferred scope, resulting mistake under equal conditions
The air permeability of filter material material, arresting efficiency is higher than the latter, resistance is low.
(4) by embodiment 2,7 it is found that under equal conditions, if the polytetrafluoroethylporous porous membrane thickness of the latter is blocked up, gained
The air permeability of filtering material is low, resistance is high.
(5) by embodiment 2 and comparative example 2 it is found that if the filtering material density of the latter is too small, being caught under equal conditions
Collect inefficient.
(6) by embodiment 5 and comparative example 3 it is found that the thickness of the former filtering material is in preferred scope under equal conditions
If, the air permeability of obtained filtering material, arresting efficiency are higher than the latter, and resistance is low.
(7) it by embodiment 2 and comparative example 4 it is found that the latter's filtering material thickness deviation values are excessive under equal conditions, catches
Resin has phenomenon of osmosis when collection inefficient and molding.
Claims (7)
1. a kind of filtering material, it is characterised in that: the filtering material includes spun-bonded non-woven fabrics fid layer, polytetrafluoroethylstephanoporate stephanoporate
Film layer, the polytetrafluoroethylporous porous membrane layer be air flow into surface layer, the thickness deviation values of the filtering material within ± 25%,
And the averag density of filtering material is 0.20~0.50g/cm3。
2. filtering material according to claim 1, it is characterised in that: the spun-bonded non-woven fabrics fid layer is long by polyester
Silk non-woven fabrics is constituted.
3. filtering material according to claim 1, it is characterised in that: the polytetrafluoroethylporous porous membrane with a thickness of 5~
15μm。
4. filtering material according to claim 1, it is characterised in that: at pressure 200Pa, the air permeability of the filtering material
For 50.0~100.0L/cm2/min。
5. filtering material according to claim 1, it is characterised in that: the arresting efficiency of the filtering material be 99.9000% with
On.
6. a kind of manufacturing method of filtering material described in claim 1, it is characterised in that:
(1) fiber is by heating plate, by when give hot wind and be allowed between fiber mutually bonding and obtain spun-bonded non-woven fabrics, obtain
Spun-bonded non-woven fabrics pass through between the ribbon of two panels heating again, control its thickness between 0.30~0.60mm；
(2) by spun-bonded non-woven fabrics wherein one side and polytetrafluoroethylporous porous membrane temperature be 160~230 DEG C at carry out hot pressing
It is compound, final finished product.
7. a kind of application of filtering material described in claim 1 in field of air filtration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710997593.7A CN109692525A (en) | 2017-10-24 | 2017-10-24 | A kind of filtering material and its manufacturing method and purposes |
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|---|---|---|---|
| CN201710997593.7A CN109692525A (en) | 2017-10-24 | 2017-10-24 | A kind of filtering material and its manufacturing method and purposes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113440951A (en) * | 2020-03-27 | 2021-09-28 | 中昊晨光化工研究院有限公司 | Polytetrafluoroethylene composite filtering material |
| CN115282694A (en) * | 2022-07-08 | 2022-11-04 | 南京玻璃纤维研究设计院有限公司 | Preparation method of PTFE (polytetrafluoroethylene) membrane-coated filter material |
-
2017
- 2017-10-24 CN CN201710997593.7A patent/CN109692525A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113440951A (en) * | 2020-03-27 | 2021-09-28 | 中昊晨光化工研究院有限公司 | Polytetrafluoroethylene composite filtering material |
| CN115282694A (en) * | 2022-07-08 | 2022-11-04 | 南京玻璃纤维研究设计院有限公司 | Preparation method of PTFE (polytetrafluoroethylene) membrane-coated filter material |
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