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

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

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-

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

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

Problems: cost availability filtration efficiency

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

S Polyphenylene sulfide

PPS Properties high tenacity low shrinkage flame resistance thermoplasticity

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

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

Shaped Cross Sections 4DG™

Bicomponent Fibers PPS sheath PET core

Bicomponent Fibers PPS PET

Bicomponent Fibers 3 denier 0.19 denier

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

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

Fiber Innovation Technology, Inc.