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Dust Collection Devices with DuPontHybrid Membrane Technology - HMTnew dupont hmt offers high filtrationefficiency in dust collection media
Dust Collection devices with DuPont HMT nanofiber* provide
high filtration efficiency by capturing very fine dust particulates
and contaminants in environments up to 100 °C.
DuPont HMT proprietary technology allows filter fabricators todesign high efficiency filter media containing “membrane- like”nanofiber sheets of continuous sub-micron polymeric filaments.Filters containing DuPont HMT have low dust leakage while atthe same time low pressure drop which translates into more efficient dust or product collection.
Typical applications
DuPont HMT helps achieve low dust leakage to meet severe pollution filter standards when continuous service temperaturedoes not exceed 100 °C. Applications include jet pulse or reverseair processes for various industries like cement, steel, food, phar-maceutical, paint, polymer and powder.
Product specification and use
Available in a range of different basis weights, DuPont HMT canmeet various end use filtration requirements, in terms of bothperformance and durability. DuPont HMT can be commercially laminated onto different filtration substrates, such as needle felts, spunbond or spunlacedstructures. The chemical structure of DuPont HMT allows filtersmade with common substrates such as polyester felt to be disposed of after use by normal incineration.
* DuPont Hybrid Membrane Technology nanofiber sheets contain continuouspolymeric filaments with typical diameter between 100 nanometers and 1 micron.
Filter media made with DuPont HMT.
DuPont HMT Polyester felt substrate
Dust collectors are used to reduce emission of industrial processes inthe atmosphere and help provide cleaner environments.
Dust Collection Bags made with DuPont HMT offer high filtration efficiency, low pressure drop and long cycle times.
Optipulse LKP Fabric Filterfor metallurgical application(source Alstom Power)
EuropeDuPont International Operations SàrlAntoine SchellingP.O. Box 50CH-1218 Le Grand-Saconnex,Geneva, SwitzerlandTel. [email protected]
Performance and properties
Laboratory tests done by DuPont and a third-party test institute instructed by DuPont have been conductedon commercially available samples of filtration media made with DuPont HMT. Air permeability data havebeen measured according to ISO 9237 on new filter media which have not been exposed to dust. Filtrationdata have been measured according to VDI 3926 test method on samples after they have been submitted to 10’000 dust loading cycles. According to VDI 3926, filtration performance of DuPont HMT is comparableto ePTFE membrane in respect to dust leakage and air permeability, but at the same time it offers a lowerpressure drop and longer filtration cycles which could translate into important cost saving benefits for theend-user in regards to reduced energy consumption and longer filter life.
Air permeabilityISO 9237
180160140120100806040200
L/dm
2 /min
Polyesterneedle felt
PTFE coatedPET felt
PET felt withePTFE
membrane
DuPont HMT onPET felt
Pressure dropVDI 39261000900800700600500400300200100
0
Pa
Polyesterneedle felt
PTFE coatedPET felt
PET felt withePTFE
membrane
DuPont HMT onPET felt
Dust leakageVDI 39260.50
0.450.40
0.350.30
0.25
0.200.15
0.100.05
0m
g/m
3
Polyesterneedle felt
PTFE coatedPET felt
PET felt withePTFE
membrane
DuPont HMT onPET felt
Cycle timeVDI 3926300
250
200
150
100
50
0
seco
nds
Polyesterneedle felt
PTFE coatedPET felt
PET felt withePTFE
membrane
DuPont HMT onPET felt
U.S.A.DuPont CompanyAnil KohliAdvanced Fiber Systems5401 Jefferson Davis HighwayRichmond, VA 23234Tel. [email protected]
For more information:
Conclusion
DuPont HMT proprietary technology could allow filter fabricators to design high performance filtration productsthat could bring benefits to end users such as high filtration efficiency, low filter pressure drop and longer timeperiods between cleaning cycles when used in pulse jet or reverse air systems.
Copyright © 2007 DuPont. All rights reserved. The DuPont Oval Logo, DuPontTM, The miracles of scienceTM are registered trademarks or trademarks of DuPont and its affiliates.10/07-LM - Reorder No. L-14008
This information corresponds to our current knowledge on the subject.It is offered solely to provide possible suggestions for your ownexperimentation. It is not intended, however,to substitute for anytesting you may need to conduct to determine for yourself the sui-tability of our products for your particular purposes.This informa-tion may be subject to revision as new knowledge and experiencebecomes available. Since we cannot anticipate all variations inactual end-use conditions, DuPont makes no warranties andassumes no liability in connection with any use of this information.Nothing in this publication is to be considered as a license to ope-rate under or a recommendation to infringe any patent right.Product safety information is available upon request.
Air permeability of DuPont HMT is comparable to ePTFE
membrane when laminated on polyester felt.
Dust leakage of DuPont HMT on PET felt is much lower than
coated and uncoated PET felt, and comparable to PET felt
laminated with ePTFE membrane.
DuPont HMT on PET felt has a lower pressure drop than
other commercially available filter media tested.
DuPont HMT on PET felt has a longer cycle time than other
commercially available filter media tested.
