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Jay PerrySimco Industrial Static Control. www.cema-converting.org. Page 2 . Why is Web Cleaning Important?. Production problemsReduced productivityAdded labor costsQuality problemsCostly production rejectsUnhappy customersReduced Profitability. Jay PerrySimco Industrial Static Control. www.
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1. COATING & LAMINATING SEMINARJune 3-4, 2007 – Rosemont, IL@ CMM International Jay Perry
Simco Industrial Static Control
215-997-3418
2. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 2
Why is Web Cleaning Important? Production problems
Reduced productivity
Added labor costs
Quality problems
Costly production rejects
Unhappy customers
Reduced Profitability
3. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 3
4. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 4
Static ElectricityCause – Effect - Control Cause
Definition
Triboelectrification = Friction
Triboelectric Series Chart
Magnitude of Charge
Cumulative Nature
Typical Areas of Charge Generation
Effect
Control
5. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 5
Definition of Static Electricity
6. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 6
Triboelectrification“Tribo Charging” Contacting Surfaces
Alignment of Electrons
Separating Surfaces
Exchange of Electrons
One surface becomes negatively charged.
One surface is left positively charged.
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Simco Industrial Static Control www.cema-converting.org Page 7
Triboelectrification
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Simco Industrial Static Control www.cema-converting.org Page 8
Triboelectric Series Chart Higher on the Chart
Propensity to positive charge
Lower on the Chart
Propensity to negative charge
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Simco Industrial Static Control www.cema-converting.org Page 9
Triboelectric Series
10. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 10
Magnitude of charge is dependent upon: Types of materials in contact
Surface resistivity
Ambient humidity
Web speed
Contact surface area
pressure
friction
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Simco Industrial Static Control www.cema-converting.org Page 11
12. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 12
Typical areas where significant charges may be generated Unwind
Nip rolls
Accumulator
Idler with insulative sleeve
Bow roll
Coating rolls
Corona treater
Lay-on roll
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Simco Industrial Static Control www.cema-converting.org Page 13
Effects of Surface Charges on Airborne Particles
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Simco Industrial Static Control www.cema-converting.org Page 14
Control Surface Charge as Opposite Polarity Ions from Static Bars are Attracted, Neutralizing the Web
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Simco Industrial Static Control www.cema-converting.org Page 15
Boundary Layer of Air Definition
Problems for web cleaning
Laminar Layer
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Simco Industrial Static Control www.cema-converting.org Page 16
Definition of Boundary Layer of Air
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Simco Industrial Static Control www.cema-converting.org Page 17
Boundary Layer Graph
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Simco Industrial Static Control www.cema-converting.org Page 18
Traps smaller particles, <20 micron
Layer closest to the surface
Suction effect
Laminar Layer of Air
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Simco Industrial Static Control www.cema-converting.org Page 19
Laminar Layer Graph
20. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 20
Effective Particle Extraction Vacuum Systems
Contact Cleaners
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Simco Industrial Static Control www.cema-converting.org Page 21
Vacuum Systems Cost effective
Reliable
Proven Efficiency
15 to 20 micron
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Simco Industrial Static Control www.cema-converting.org Page 22
Types of Vacuum Systems High Pressure, Low Volume
Low Pressure, High Volume
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Simco Industrial Static Control www.cema-converting.org Page 23
Vacuum SystemsHigh Pressure, Low Volume Traditional “High Suction” System
High Static Pressure
Requires a supported surface
Idler roller
Solid Surface
Contact or Non-Contact
24. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 24
Vacuum SystemsHigh Pressure, Low Volume Strict mounting requirements
“KISS” touch contact brush system
Rotary brush contact system
Chad blade non-contact system
Limited debris handling capacity
10 to 20 feet distance to collector
25. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 25
High Pressure, Low Volume
26. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 26
Vacuum SystemsLow Pressure, High Volume
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Simco Industrial Static Control www.cema-converting.org Page 27
Vacuum SystemsLow Pressure, High Volume Designed to move volumes of air
Low static pressure
Capable of supported or unsupported web installation
Contact or Non-Contact
Effective in non-contact applications
28. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 28
Vacuum SystemsLow Pressure, High Volume Varied mounting options
Over supported surface or open web
Effective debris handling capabilities
Capable of transporting debris distances
Collection system remote mounting
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Simco Industrial Static Control www.cema-converting.org Page 29
Low Pressure, High Volume
30. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 30
Low Pressure, High Volume
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Simco Industrial Static Control www.cema-converting.org Page 31
VACUUM SYSTEM TESTSBEFORE/AFTER
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Simco Industrial Static Control www.cema-converting.org Page 32
Vacuum System Test Results
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Simco Industrial Static Control www.cema-converting.org Page 33
Vacuum System Test Results
34. Jay Perry
Simco Industrial Static Control www.cema-converting.org Page 34
Contact Cleaners Electronics industry origins
Smaller particle removal
Effective to 1 micron
Nip configuration most effective
Consistent surface contact
Consistent control of Boundary Layer
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Simco Industrial Static Control www.cema-converting.org Page 35
Contact Cleaners Industrial usage capable
Speed handling capabilities improved with ground “tacky rolls”
Ground vs Cast rolls: geometry and balance
<1,000 fpm systems: adhesive tape cleaning
>1,000 fpm systems: computer controlled cleaning, 24/7.
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Simco Industrial Static Control www.cema-converting.org Page 36
Contact Cleaner Configuration Comparison
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Simco Industrial Static Control www.cema-converting.org Page 37
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Simco Industrial Static Control www.cema-converting.org Page 38
Contact Cleaner Test Results- 1 micron
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Simco Industrial Static Control www.cema-converting.org Page 39
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Simco Industrial Static Control www.cema-converting.org Page 40
ROIReturn on Investment “How clean do you need to be?”
>15 to 20 micron
>1 micron
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Simco Industrial Static Control www.cema-converting.org Page 41
ROIReturn on Investment How much does it cost you to be dirty?”
Reduced productivity = $
Increased labor/maintenance cost = $
High production rejects = $
Customer returns = $
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Simco Industrial Static Control www.cema-converting.org Page 42
“Typical ROI, regardless of the system chosen, is in months”
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Simco Industrial Static Control www.cema-converting.org Page 43
The cost of losing a customer…