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Importance of Drying
> Fabrication Process >
Purging & Using Regrinds > Finishing
Parts fabricated from CALIBRE* resins
can be readily finished or decorated using a variety of
conventional methods. Techniques commonly used include:
painting, hot stamping, ultrasonic welding and plating.
Since polycarbonate resins are sensitive
to solvents,
solvents used in the finishing process must be carefully
selected (See Table 5 for more details).
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| Table
5: Chemical Resistance Ratings of CALIBRE Polycarbonate
Resins |
RESISTANCE
RATING |
GENERAL
REAGENTS |
SPECIFIC
REAGENTS |
| Good |
Acids(diluted),
alcohols, cooking oils, lubricating oils, detergents,
phenols, photochemicals,acidic salts, neutral salts |
Methanol,
ethanol, ethylene glycol, motor oil |
| Fair |
Acids(concentrated),
alkalis(diluted), basic salts |
Gasoline |
| Poor |
Alkalis(concentrated),
chlorinated hydrocarbons,aromatic or aliphatic hydrocarbons,
esters, ketones, benzens |
Acetone,
brake fluid, methylene chloride, trichloroethane,
tetrachloroethane, carbon tetrachloride, zinc stearate |
Note
(1) Tested at 23กษ, 50% RH
(2) Ratings definition
Good = Little or no reduction in physical properties;
change in weight under one percent and change in
tensile strength under five percent.
Fair = Some reduction in physical properties occurs
after long exposure, with either a change in weight
of more than one percent or a change in tensile
strength of more five percent.
Poor = Significant changes in physical properties
after short exposure to the substance, with both
a change in weight of more than one percent and
a change in tensile strength of more than five percent.
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"*" Trademark of the Dow Chemical Company, licensed for use by LG DOW
Polycarbonate LTD.
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