Sign-Brite
Technical Data
Sign-Brite has conducted both accelerated
weathering and field weathering
trials on the Sign-Brite restoration process.
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DEFINITIONS:
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Weathering-Weathering is the process of exposure of sign
faces to outdoor conditions and influences of temperature, oxygen,
relative humidity and UV radiation. Weatherability is the resistance
of a sign face against weathering.
Yellowing-Yellowing is
discoloration by the effect of light, chemicals, atmospheric oxygen,
etc...
Haze-Haze gives a cloudy
appearance on the surface of a sign face. It is a measure of the
clarity of a transparent sheet.
Gloss-Gloss is a measure of
brightness and luster on a sign surface. Gloss reduction occurs when
sign faces experience weathering, yellowing and haze.
ACCELERATED QUV WEATHER RESULTS:
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Summary
- Unprotected polycarbonate is in
the visible yellowness range after 200 QUV hours or approximately
1 year.
- Sign-Brite protected
polycarbonate is NOT in the visible yellowness range after 1500
hours or approximately 5 years.
Summary
-
Sign-Brite protected
polycarbonate has a higher initial haze because of the outdoor
environment in which it is applied.
-
The unprotected
polycarbonate soon passes Sign-Brite in haze. Sign-Brite increases
slowly meaning only small visual changes in your signs appearance.
IMPACT TESTING:
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GE Drop Dart Test
5lb. Steel Dart
1 inch Diameter Tip
|
Unprotected Polycarbonate
|
>200ft. lb.
|
|
Sign-Brite Protected Polycarbonate
|
>200ft. lb.
|
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Many cleaning
chemicals and solvents are incompatible with polycarbonate. This
causes it to become brittle and lose impact resistance resulting in
stress fractures and breaks. Sign faces with fractures and breaks
often require replacing.
-
Impact studies have
been conducted with the proprietary materials and processes utilized
in the Sign-Brite restoration process.
Summary
-
Polycarbonate
protected and restored with Sign-Brite maintains its > 200 ft. lb.
impact resistance.
-
This demonstrates
Sign-Brite materials and processes are compatible with polycarbonate
and WILL NOT be detrimental to your sign face.
GLOSS
RETENTION/LIFE EXPECTANCY: (back to the top)
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You should be aware
that all plastic materials are subject to irreversible decomposition
of atmospheric elements and can be expected to show signs of
weathering, yellowness, haze and overall gloss reduction eventually.
-
Sign-Brite has
conducted both accelerated weathering and field weathering tests on
samples utilizing the Sign-Brite Restoration Process.
-
No “Visible Gloss
Reduction” was noted after 1050 hours of QUV testing or 2 years of
field weathering. Slight “Visible Gloss Reduction” was noted after 3
years of field testing.
info@sign-brite.com
Sign-Brite Copyright 2006
