1. Advances in Fiber Technology for High-Performance Filtration
Jeffrey S. Dugan
and
Edward C. Homonoff
Fiber
Innovation
Technology, Inc.

2. (yes, this is the first slide)

3. bag house filtration unit
Coal power plant process diagram, featuring exhaust gas filtration

5. soot hot air H2O SOx NOx Hg Cl-, Br-, F-, I- bag filters clean air
to stack
soot
hot air
bag
H2O
filters
SOx
NOx Hg
Cl-, Br-, F-, I-

6. Typical Baghouse Fabric
needlepunched nonwoven – 16 oz./yd2
tightly needled to control permeability
optional scrim for dimensional stability
optional expanded PTFE laminate
to limit penetration

7. Typical Baghouse Fibers
chemical resistance
cost/lb
Teflon®
good resistance pH 1-14
$28-32
P84 ®
poor acid resistance
$13-15
Kermel ®
poor acid resistance
$12-14
Nomex ®
poor acid resistance
$10-12
Glass
v. poor acid resistance
low

8. Problems:
cost
availability
filtration efficiency

9. Solution: PPS √ cost √ ? availability ? filtration efficiency
(polyphenylene sulfide) √
cost √ ?
availability ?
filtration efficiency

10. S
Polyphenylene sulfide

11. PPS Properties high tenacity low shrinkage flame resistance
thermoplasticity

12. PPS Wet Heat Resistance
160º C autoclave (6.5 kg/cm3)
100
PPS 80
% strength
retention
PET
meta-aramid 60 24 48 72 96
120
144
days exposed

13. PPS Chemical Resistance
48% Sulfuric Acid
100
PPS
meta-aramid 80
% strength
retention 60 15 30 45 60 75 90
days exposed

14. Shaped Cross Sections
4DG™

15. Bicomponent Fibers
PPS sheath
PET core

16. Bicomponent Fibers
PPS
PET

17. Bicomponent Fibers
3 denier
0.19 denier

18. Solution: PPS √ cost √ availability √ filtration efficiency √
(polyphenylene sulfide) √
cost √
availability √
filtration efficiency √
healthy lungs

19. (yes, this is the last slide)
Fiber
Innovation
Technology, Inc.
(yes, this is the last slide)

20. Fiber
Innovation
Technology, Inc.