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Advances in Fiber Technology for High-
Performance Filtration
Jeffrey S. Duganand
Edward C. Homonoff
FiberInnovationTechnology, Inc.
(yes, this is the first slide)
Coal power plant process diagram, featuring exhaust gas filtration
bag housebag housefiltration unitfiltration unit
soot
hot air
SOx
H2O
NOx
Hg
Cl-, Br-, F-, I-
bagfilters
to stackclean air
Typical Baghouse Fabric
needlepunched nonwoven – 16 oz./yd2
tightly needled to control permeability
optional scrim for dimensional stability
optional expanded PTFE laminateto limit penetration
Typical Baghouse Fibers
fiber chemical resistance cost/lb
P84 ® poor acid resistance $13-15
Kermel ® poor acid resistance $12-14
Nomex ® poor acid resistance $10-12
Teflon® good resistance pH 1-14 $28-32
Glass v. poor acid resistance low
Problems:
cost
availability
filtration efficiency
Solution: PPS
cost
availability
filtration efficiency
(polyphenylene sulfide)
√
√ ?
?
S
Polyphenylene sulfide
PPS PropertiesPPS Properties
high tenacityhigh tenacity
low shrinkagelow shrinkage
flame resistanceflame resistance
thermoplasticitythermoplasticity
PPS Wet Heat ResistancePPS Wet Heat Resistance
6060
8080
100100
% strengthretention
% strengthretention
days exposeddays exposed
00 2424 4848 7272 9696 120120 144144
PET
PPS
160º C autoclave (6.5 kg/cm3)160º C autoclave (6.5 kg/cm3)
meta-aramid
PPS Chemical ResistancePPS Chemical Resistance
6060
8080
100100
% strengthretention
% strengthretention
days exposeddays exposed
00 1515 3030 4545 6060 7575 9090
PPS
48% Sulfuric Acid48% Sulfuric Acid
meta-aramid
Shaped Cross SectionsShaped Cross Sections
4DG™4DG™
Bicomponent FibersBicomponent Fibers
PPS sheath
PET core
Bicomponent FibersBicomponent Fibers
PPS
PET
3 denier 0.19 denier
Bicomponent FibersBicomponent Fibers
Solution: PPSSolution: PPS
cost
availability
filtration efficiency
(polyphenylene sulfide)(polyphenylene sulfide)
√
√
√
healthy lungs√
(yes, this is the last slide) FiberInnovationTechnology, Inc.
FiberInnovationTechnology, Inc.
