Polycarbonate Manufacturing
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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

Beta-Klean Z2200, 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

 

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