Contaminations
In raw materials (solid and semi-solid gels)
From tanks and piping in contact with CH2Cl2 H which is corrosive
High molecular weight gels formed in the reaction process
Contaminations – The Problems
• Inability of the optical storage media/discs to store and retrieve information as quickly and accurately as possible
• Inaccuracies in writing and reading by a laser beam traversing a CD or DVD surface
• Cosmetic and strength-related defects in
• window glazing for buildings and automobiles
• various molded computer components
Benefits of Filtration
Consistently meet optical grade polycarbonate specification for particles 0.5 and larger (Particle measurement)
Achieve higher selling price commanded by optical grade PC, add significant revenue
Consistently meet industrial grade specification and appearance requirements for window glazing products and automotive components
Recommendations
Ref to Fig.1. |
Fluid Processed |
Filter Recommendation for Optical Grade PC |
Filter Recommendation for General Grade PC |
A |
CH2CL2 |
PTFE Cartridge 10µm abs |
PTFE Bag,10µm |
B |
BPA, Phenol, NaOH, Catalyst |
JAF/ELCPP 2µm abs |
JAF/ELCPP 10µm abs |
C |
Phosgene |
CWFG, FCN, 10µm abs |
CWFG FCN 20µm abs |
D |
PC-CH2CL2 Mix |
CWFG, FCN, 40µm abs |
Same |
E |
PC-CH2CL2 Mix |
PTFE Cartridge |
Not used |
F |
PC-CH2CL2 Mix |
PTFE Cartridge, 1µm |
PTFE cartridge, 10µm abs |
G |
Raw Water |
JAF 5µm abs |
Same |
H |
Filtered Raw Water |
JAF/ Rocket Bag 2µm abs |
Same |
I |
DI Water |
JAF/ Rocket Bag 2µm abs |
Same |
J |
Raw Water |
JAF 20µm abs |
Same |
K |
Filtered Raw Water |
JAF 25µm abs |
Same |