CN109162025A - A kind of double milling train post forming filterings preparation method and application of gradient-structure PET melt spraying non-woven fabrics - Google Patents
A kind of double milling train post forming filterings preparation method and application of gradient-structure PET melt spraying non-woven fabrics Download PDFInfo
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- CN109162025A CN109162025A CN201811272062.2A CN201811272062A CN109162025A CN 109162025 A CN109162025 A CN 109162025A CN 201811272062 A CN201811272062 A CN 201811272062A CN 109162025 A CN109162025 A CN 109162025A
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/55—Polyesters
-
- 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
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/56—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres
- D04H1/565—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving in association with fibre formation, e.g. immediately following extrusion of staple fibres by melt-blowing
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Materials (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The present invention relates to a kind of preparation method and applications of double milling train post forming filtering gradient-structure PET melt spraying non-woven fabrics, including preparing PET layer of meltblown fibers, it is 120 ~ 160 DEG C that obtained fibrous layer, which is passed through hot-rolling mill in temperature, and pressure is thermally bonded completely for the first time under the conditions of being 30 ~ 60N；Then again pass by hot-rolling mill temperature be 200 ~ 240 DEG C, pressure be 40N ~ 100N under the conditions of carry out it is secondary be non-fully thermally bonded, obtain gradient-structure PET melt spraying non-woven fabrics.The PET melt spraying non-woven fabrics that the present invention obtains, which are applied to liquid/gas filtering, has the advantages that Air permenbility is big, filtering accuracy is high, and pressure drop is small, long service life.
Description
Technical field
The present invention relates to melt spraying non-woven fabrics technical fields, and in particular to gradient-structure is used in a kind of double milling train post formings filtering
The preparation method and application of PET melt spraying non-woven fabrics.
Background technique
Current PET melt spraying non-woven fabrics mostly use the primary heat bonding technology of high temperature and pressure, aperture size narrow distribution range,
Filtering when, most of particle is intercepted at the surface of filtering layer, and surface void is easy to be filled and its internal voids does not have
It is utilized effectively, pressure during the filtration process rises rapidly, prevent filter material reduces material from playing one's part to the full
Pollutant carrying capacity.
In addition, primary heat bonding technology determines that high filtering precision, high pollutant carrying capacity and high Tear strength can not get both, have
Body surface is present: on the one hand, bonding temperature is lower, and pressure is smaller, more help to obtain the aperture of larger size, improves material
Pollutant carrying capacity and tearing strength.But the aperture of larger size reduces the filtering accuracy of material；On the other hand, the temperature of heat bonding
Degree is higher, and pressure is bigger, more help to obtain the lesser aperture of size, improves filtering accuracy, but destroy single fiber knot
Structure and then the tearing strength for reducing material, lesser aperture also reduces the pollutant carrying capacity of material.
Therefore, once the filter effect of the PET melt spraying non-woven fabrics of heat bonding technology production and pollutant carrying capacity are extremely limited, often
It is usually used in the lower filtering environment of filtering requirement.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of double milling train post forming filterings gradient-structure PET to be meltblown
The preparation method and application of non-woven fabrics, thus it is possible to vary the structure of PET melt spraying non-woven fabrics keeps it strong in raising pollutant carrying capacity and structure
Filtering accuracy is improved while spending.
The present invention is achieved through the following technical solutions:
A kind of preparation method of double milling train post forming filtering gradient-structure PET melt spraying non-woven fabrics is provided, comprising the following steps:
Step 1: preparation PET layer of meltblown fibers；
Step 2: hot rolling gradient forms twice: it is 120 ~ 160 DEG C that obtained fibrous layer, which is passed through hot-rolling mill in temperature, and pressure is
It is thermally bonded completely for the first time under the conditions of 30 ~ 60N；Then again passing by hot-rolling mill in temperature is 200 ~ 240 DEG C, and pressure is
Carried out under the conditions of 40N ~ 100N it is secondary be non-fully thermally bonded, obtain gradient-structure PET melt spraying non-woven fabrics.
In above-mentioned steps one, prepare PET layer of meltblown fibers: will by dry, pre-crystallized treated that PET raw material feeds spiral shell
In bar machine press, melting extrusion melt, is transported in metering pump through filter at 210-320 DEG C, and die head is transported to after metering
Spinneret is carried out, and carries out drawing-off using hot-air, collects to obtain PET layer of meltblown fibers by receiving lace curtaining.
Wherein, the pre-crystallized treatment temperature of PET slice is 120-160 DEG C, time 20-60min.The drying of PET slice
Temperature is 120-160 DEG C, drying time 3-12h, and the temperature of hot-air is 280-380 DEG C, pressure 0.05-0.3MPa.
Further, the thickness of the layer structure of fibrous layer accounts for the 50% ~ 90% of overall thickness completely after heat bonding for the first time, secondary
The thickness of the endothecium structure of fibrous layer accounts for the 10% ~ 50% of overall thickness after being non-fully thermally bonded.
Further, in step 1, hot-rolling mill is one of plain-barreled roll or flower roll.
Web outermost fibers can be carried out partial melting, the application small suitable for filtering accuracy by the use of flower roll.It is flat
The use of roller can sufficiently be melted web outermost fibers, and the aperture of outer layer fiber is reduced as far as possible, is suitable for
The demanding application of filtering accuracy.
Further, in step 2, hot-rolling mill is plain-barreled roll.
The use of plain-barreled roll guarantees that step 1 product appearance will not be destroyed, further fills web outermost fibers
Divide and melt, the aperture of outer layer fiber is further reduced, is suitable for filtering accuracy and requires higher application.
Further, in step 1, the viscosity of selected PET slice is 0.35-0.55 dl/g, fusing point 230-265
℃。
One kind is according to gradient-structure PET melt spraying non-woven fabrics made from above-mentioned steps.
Further, the outer layer of PET melt spraying non-woven fabrics is the small-bore PET meltblown fibers being thermally bonded completely, aperture model
Enclosing is 2 μm ~ 20 μm, and the internal layer of PET melt spraying non-woven fabrics is the PET meltblown fibers for the loose large aperture being non-fully thermally bonded, hole
Diameter range is 10 μm ~ 30 μm.
The pore diameter range of outer layer PET meltblown fibers, which is 2 μm ~ 20 μm, can not only bear higher hydraulic pressure but also can have
Effect guarantees that the filtering accuracy of fibrous layer, the pore diameter range of the PET meltblown fibers of internal layer are 10 μm ~ 30 μm and increase interfibrous receive
Dirty space, and then improve the pollutant carrying capacity of non-woven fabrics and prolong the service life.
A kind of double milling train post forming filterings use gradient-structure PET melt spraying non-woven fabrics as filter core in dust filter unit
Using.
Further, the filter core is that cylinder is made after coining, glued thermal finalization in gradient-structure PET melt spraying non-woven fabrics
Shape or flat liquid filter cartridge.
Further, the use temperature of the dust filter unit is 160 DEG C -240 DEG C.
The present invention has the advantage that compared with prior art
Break the office that high filtering precision, high pollutant carrying capacity and the high Tear strength three of existing PET melt spraying non-woven fabrics can not get both
Limit, it is excellent to give full play to high-melting-point, high-mechanical property possessed by PET rigid molecule chain etc. by the rational design of gradient-structure
Gesture.
PET meltblown fibers are successively passed through two milling trains of cryogenic high pressure and high-temperature low-pressure to be thermally bonded.First milling train is low
Consolidated fibers have only been reserved larger aperture between the fibers, ensure that non-woven fabrics by warm high pressure without destroying single fibre strength
Mechanical strength and high pollutant carrying capacity；Second milling train high-temperature low-pressure, only melts outermost fibers completely, reduces outermost fibers
Aperture ensure that the filtering accuracy of non-woven fabrics.
The gradient-structure of this " internal defect+outside is semiclosed " is applied to filtering, by high filtering precision, high pollutant carrying capacity
It gets both, has the advantage that with high Tear strength three
One, internal defect macroporous structure, increase it is interfibrous receive dirty space, and then improve pollutant carrying capacity and the extension of non-woven fabrics
Service life；
Two, external fine and close small structure, higher tearing strength enable material to bear higher hydraulic pressure, lesser fiber aperture
Improve the filtering accuracy of material.
Three, internal defect macroporous structure improves pollutant carrying capacity, and the gradient-structure that external aperture structure improves filtering accuracy is set
Meter gives full play to the advantage of different pore size filtering inside filter material, it is ensured that filter efficiency effectively prolongs the service life, and utilizes PET
The higher tearing strength of material improves water-fast/air pressure ability of material.
Therefore non-woven cloth of the invention have it is non-roll that point, Air permenbility are big, filtering accuracy is high, small, service life drops in pressure
Long advantage.
Detailed description of the invention
Fig. 1 is the non-woven fabrics graph of pore diameter distribution of embodiment 2 in the present invention；
Fig. 2 is that non-woven fabrics is made in the present invention in embodiment 3 for structural schematic diagram when filtering；
Fig. 3 is the structural schematic diagram in Fig. 2 at a；
Fig. 4 is the structural schematic diagram in Fig. 2 at b；
Fig. 5 is the experimental data tabular drawing of the embodiment of the present invention and comparative example.
Specific embodiment
In order to clarify the technical characteristics of the invention, being illustrated below by specific embodiment to this programme.
Embodiment 1
It is first 0.45dl/g by viscosity, the PET that fusing point is 265 DEG C, which is sliced, to be passed through according to the preparation step of above-mentioned preparation method
120 DEG C, 30min it is pre-crystallized and 160 DEG C, 8 hours it is sufficiently dry after, pass through meltblowing method and obtain PET meltblown fibers, recycle
340 DEG C of hot-airs of 0.2MPa temperature carry out drawing-off, obtain PET melt-blow fiber web；Fibre web is successively passed through to 130 DEG C, 70N's is primary flat
The secondary flat roll mill of roller mill and 220 DEG C, 20N obtains PET melt spraying non-woven fabrics.The fibre fineness of PET melt spraying non-woven fabrics is
0.25D, the grammes per square metre scope 50g/m2, with a thickness of 0.4mm.The internal defect macroporous structure of PET melt spraying non-woven fabrics with a thickness of
0.24mm, pore diameter range are 20 μm ~ 25 μm, and for external densification small structure with a thickness of 0.08mm, pore diameter range is 3 μm ~ 5 μm.
Comparative example 1
It is 0.45dl/g by viscosity, the PET slice that fusing point is 265 DEG C passes through 120 DEG C, 30min is pre-crystallized and 160 DEG C, 8 hours are filled
After dividing drying, pass through meltblowing method and obtain PET meltblown fibers, 340 DEG C of hot-airs of 0.2MPa temperature is recycled to carry out drawing-offs, acquisition
PET melt-blow fiber web.Fibre web is passed through 250 DEG C, a flat roll mill of 110N obtains the PET melt-blown nonwoven with single aperture
Cloth.The fibre fineness of PET melt spraying non-woven fabrics is 0.25D, the grammes per square metre scope 50g/m2, with a thickness of 0.2mm, pore diameter range is 2 μm ~
4μm。
Embodiment 2
It is 0.45dl/g by viscosity, the PET that fusing point is 265 DEG C is sliced after pre-crystallized, abundant drying, and it is fine to obtain PET melt-blown
Fibre web, is successively passed through 140 DEG C by net, a flat roll mill of 80N and 220 DEG C, and the secondary flat roll mill of 30N, which obtains, has gradient
The PET melt spraying non-woven fabrics of structure.The fibre fineness of PET melt spraying non-woven fabrics is 0.25D, the grammes per square metre scope 70g/m2, with a thickness of
0.45mm.The pore diameter range of the internal defect macroporous structure of PET melt spraying non-woven fabrics is 17 μm ~ 20 μm, external densification small structure
Pore diameter range be 3 μm ~ 5 μm.
Comparative example 2:
It is 0.45dl/g by viscosity, the PET that fusing point is 265 DEG C is sliced after pre-crystallized, abundant drying, is obtained by meltblowing method
PET meltblown fibers are obtained, fibre web are successively passed through to 240 DEG C, a flat roll mill of 80N obtains PET melt spraying non-woven fabrics.PET melt-blown
The fibre fineness of non-woven fabrics is 0.25D, the grammes per square metre scope 70g/m2, with a thickness of 0.3mm.The pore diameter range of PET melt spraying non-woven fabrics
It is 2 μm ~ 4 μm.
Embodiment 3
It is 0.4dl/g by viscosity, the PET that fusing point is 265 DEG C is sliced after pre-crystallized, abundant drying, and it is fine to obtain PET melt-blown
Fibre web, is successively passed through 140 DEG C by net, a flat roll mill of 85N and 230 DEG C, and the secondary flat roll mill of 40N, which obtains, has gradient
The PET melt spraying non-woven fabrics of structure.The fibre fineness of PET melt spraying non-woven fabrics is 0.35D, the grammes per square metre scope 90g/m2, with a thickness of
0.5mm.For the internal defect macroporous structure of PET melt spraying non-woven fabrics with a thickness of 0.3mm, pore diameter range is 20 μm ~ 25 μm, external fine and close
For small structure with a thickness of 0.1mm, pore diameter range is 5 μm ~ 7 μm.
Comparative example 3:
It is 0.4dl/g by viscosity, the PET that fusing point is 265 DEG C is sliced after pre-crystallized, abundant drying, is obtained by meltblowing method
PET meltblown fibers are obtained, fibre web are successively passed through to 140 DEG C, a flat roll mill of 85N obtains PET melt spraying non-woven fabrics.PET melt-blown
The fibre fineness of non-woven fabrics is 0.35D, the grammes per square metre scope 90g/m2, with a thickness of 0.32mm.The pore diameter range of PET melt spraying non-woven fabrics
It is 4 μm ~ 6 μm.
Embodiment 4
It is 0.55dl/g by viscosity, the PET that fusing point is 235 DEG C is sliced after pre-crystallized, abundant drying, and it is fine to obtain PET melt-blown
Fibre web, is successively passed through 160 DEG C by net, a flat roll mill of 95N and 235 DEG C, and the secondary flat roll mill of 50N, which obtains, has gradient
The PET melt spraying non-woven fabrics of structure.The fibre fineness of PET melt spraying non-woven fabrics is 0.35D, the grammes per square metre scope 120g/m2, with a thickness of
0.7mm.For the internal defect macroporous structure of PET melt spraying non-woven fabrics with a thickness of 0.5mm, pore diameter range is 18 μm ~ 22 μm, external fine and close
Small structure thickness 0.1mm, pore diameter range are 5 μm ~ 7 μm.
Comparative example 4:
It is 0.55dl/g by viscosity, the PET that fusing point is 235 DEG C is sliced after pre-crystallized, abundant drying, is obtained by meltblowing method
PET meltblown fibers are obtained, fibre web are successively passed through to 160 DEG C, a flat roll mill of 95N obtains PET melt spraying non-woven fabrics.PET melt-blown
The fibre fineness of non-woven fabrics is 0.35D, the grammes per square metre scope 120g/m2, with a thickness of 0.5mm.The pore diameter range of PET melt spraying non-woven fabrics
It is 4 μm ~ 6 μm.
Embodiment 5
It is 0.55dl/g by viscosity, the PET that fusing point is 265 DEG C is sliced after pre-crystallized, abundant drying, and it is fine to obtain PET melt-blown
Fibre web, is successively passed through 160 DEG C by net, a flat roll mill of 110N and 240 DEG C, and the secondary flat roll mill of 60N, which obtains, has ladder
Spend the PET melt spraying non-woven fabrics of structure.The fibre fineness of PET melt spraying non-woven fabrics is 0.48D, the grammes per square metre scope 140g/m2, with a thickness of
1.2mm.For the internal defect macroporous structure of PET melt spraying non-woven fabrics with a thickness of 0.8mm, pore diameter range is 20 μm ~ 26 μm, external fine and close
Small structure thickness 0.2mm, pore diameter range are 7 μm ~ 10 μm.
Comparative example 5:
It is 0.55dl/g by viscosity, the PET that fusing point is 265 DEG C is sliced after pre-crystallized, abundant drying, is obtained by meltblowing method
PET meltblown fibers are obtained, fibre web are successively passed through to 160 DEG C, a flat roll mill of 110N obtains PET melt spraying non-woven fabrics.PET melt-blown
The fibre fineness of non-woven fabrics is 0.48D, the grammes per square metre scope 140g/m2, with a thickness of 0.8mm.The pore diameter range of PET melt spraying non-woven fabrics
It is 9 μm ~ 12 μm.
It should be noted that embodiment 2 ~ 5 and the PET melt-blown fibre with the one-to-one comparative example 2 ~ 5 of embodiment 2 ~ 5
The equal reference implementation example 1 of pre-crystallized and drying method of net, it is 130 DEG C that the PET selected, which is sliced pre-crystallized treatment temperature, when
Between be 60min.At 140 DEG C, drying time is controlled in 11h for the drying temperature control of PET slice.Treated PET is in 0.2MPa
340 DEG C of hot-airs of temperature carry out drawing-off and obtain PET melt-blow fiber web.
Respectively to excessively double milling train post formings filtering gradient-structure PET melt-blow nonwoven of embodiment 1 ~ 5 and comparison
The PET melt-blow nonwoven that single aperture structure is filtered in the one-pass molding of example 1 ~ 5 is detected, and specific testing standard is thickness
Test uses GB/T3820-1997 standard；Permeability test uses ASTM D737 standard；Ultimate strength and extension at break use
4595 testing standard of ASTMD；Filter element filtering performance test, with reference to GB/T18853-2002, carrier is water；Opening size test uses
Platen press is steeped, performance indexes is as shown in Figure 5.
Embodiment 1 is compared with comparative example 1 it can be seen from the test result of Fig. 5, is 50g/m in same grammes per square metre2Condition
Under, post forming filtering of the invention is PET more hot-forming than single prepared by same raw material with gradient-structure PET melt spraying non-woven fabrics
The ultimate strength and extension at break of melt-blown are not much different, but air penetrability is 1.61 times of the latter, it means that identical operating pressure
Under the conditions of, post forming filtering of the invention while guaranteeing big permeable amount, is increased with gradient-structure PET melt spraying non-woven fabrics
Water carrier flow and contact area, that is, under same working environment with the basic phase of non-woven fabrics filter effect in comparative example
Together, but pressure drop is smaller, and the service life is longer.
Similarly from remaining several groups of embodiments and comparative example, under conditions of same grammes per square metre, in the embodiment of the present invention
To gradient-structure PET melt spraying non-woven fabrics get both in high filtering precision, high pollutant carrying capacity and high tensile strength three, filtering effect
Fruit will be substantially better than the strainability of the PET non-woven fabrics only obtained through single hot-roll in comparative example.
In addition bubble platen press opening size test shows as shown in Figure 1, prepared 70g/m in embodiment 22Post forming filtering is used
The outer layer minimum-value aperture of gradient-structure PET melt spraying non-woven fabrics is 10 μm, and aperture size is distributed in 10-18 μm, aperture size point
Cloth range is relatively narrow, can effective guarantee filtering accuracy.Meanwhile internal aperture has reached 20 ~ 26 μm since cryogenic high pressure acts on, and is outer
1 times of layer aperture.Ectonexine aperture structure distribution in gradient, can realize for liquid/gas body filter core to the more of sizes particle
Grade filtering is, it can be achieved that filtration efficiency, the purpose of multistage filtering.
Certainly, above description is also not limited to the example above, technical characteristic of the present invention without description can by or
It is realized using the prior art, details are not described herein；Above embodiments and attached drawing are only used to illustrate the technical scheme of the present invention not
It is limitation of the present invention, is described the invention in detail referring to preferred embodiment, the ordinary skill people of this field
Member is it should be appreciated that variation, remodeling, the addition that those skilled in the art are made within the essential scope of the present invention
Or replacement also should belong to claims of the invention without departure from spirit of the invention.
Claims (10)
1. the preparation method that gradient-structure PET melt spraying non-woven fabrics are used in a kind of double milling train post forming filterings, it is characterised in that: including
Following steps:
Step 1: preparation PET layer of meltblown fibers；
Step 2: hot rolling gradient forms twice: it is 120 ~ 160 DEG C that obtained fibrous layer, which is passed through hot-rolling mill in temperature, and pressure is
It is thermally bonded completely for the first time under the conditions of 30 ~ 60N；Then again passing by hot-rolling mill in temperature is 200 ~ 240 DEG C, and pressure is
Carried out under the conditions of 40N ~ 100N it is secondary be non-fully thermally bonded, obtain gradient-structure PET melt spraying non-woven fabrics.
2. double milling train post forming filterings according to claim 1 preparation method of gradient-structure PET melt spraying non-woven fabrics,
It is characterized by: the thickness of the layer structure of fibrous layer accounts for the 50% ~ 90% of overall thickness after being thermally bonded completely for the first time.
3. double milling train post forming filterings according to claim 1 preparation method of gradient-structure PET melt spraying non-woven fabrics,
It is characterized by: hot-rolling mill is one of plain-barreled roll or flower roll in step 1.
4. double milling train post forming filterings according to claim 1 preparation method of gradient-structure PET melt spraying non-woven fabrics,
It is characterized by: hot-rolling mill is plain-barreled roll in step 2.
5. double milling train post forming filterings according to claim 1 preparation method of gradient-structure PET melt spraying non-woven fabrics,
It is characterized by: the viscosity of selected PET slice is 0.35-0.55 dl/g in step 1, fusing point is 230-265 DEG C.
6. gradient-structure PET melt spraying non-woven fabrics made from a kind of any one of claim 1 to 5 claim.
7. gradient-structure PET melt spraying non-woven fabrics according to claim 6, it is characterised in that: the outer layer of PET melt spraying non-woven fabrics
For the small-bore PET meltblown fibers being thermally bonded completely, pore diameter range is 2 μm ~ 20 μm, and the internal layer of PET melt spraying non-woven fabrics is non-
The PET meltblown fibers for the loose large aperture being thermally bonded completely, pore diameter range are 10 μm ~ 30 μm.
8. a kind of double milling train post forming filterings use gradient-structure PET melt spraying non-woven fabrics as filter core answering in dust filter unit
With.
9. double milling train post forming filterings according to claim 8 use gradient-structure PET melt spraying non-woven fabrics to exist as filter core
Application in dust filter unit, it is characterised in that: the filter core is gradient-structure PET melt spraying non-woven fabrics by coining, gluing
Tubular or flat liquid filter cartridge are made after thermal finalization.
10. double milling train post forming filterings according to claim 8 use gradient-structure PET melt spraying non-woven fabrics to exist as filter core
Application in dust filter unit, it is characterised in that: the use temperature of the dust filter unit is 160 DEG C -240 DEG C.
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| CN201811272062.2A CN109162025B (en) | 2018-10-30 | 2018-10-30 | Preparation method and application of gradient-structure PET melt-blown non-woven fabric for double-rolling-mill secondary forming filtration |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080853A (en) * | 2020-07-23 | 2020-12-15 | 山东泰鹏环保材料股份有限公司 | Four-stage porous PET (polyethylene terephthalate) non-woven fabric for filtration and preparation method and application thereof |
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| CN101961580A (en) * | 2009-07-22 | 2011-02-02 | 王子奇能可丽纸株式会社 | The air cleaner nonwoven |
| CN103877781A (en) * | 2012-12-20 | 2014-06-25 | 约翰斯曼维尔欧洲有限公司 | Filter medium |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080853A (en) * | 2020-07-23 | 2020-12-15 | 山东泰鹏环保材料股份有限公司 | Four-stage porous PET (polyethylene terephthalate) non-woven fabric for filtration and preparation method and application thereof |
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| CN109162025B (en) | 2021-09-28 |
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