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Polyurethane Isocyanurate
Rigid
Poly(urethane) Iso(cyanurate) closed-cell polyiso (PIR) foam is
an
improvement on polyurethane foam (PUR). Once
manufactured, polyiso foam is rigid, will not soften or melt, remains
strong even at elevated temperatures and is self-extinguishing.
Widely
used for insulation, depending on the manufacturing process polyiso has an
R-value of 5.3 to 6.5 per inch of thickness. One of the most widely used
and cost effective insulation products in North America, closed cell
polyiso has been cited by the U.S. Environmental Protection Agency (EPA)
for its responsible impact on the environment and has earned Energy Star
standing.
Compression strength
is the ability of a rigid foam board to resist deformation and maintain
its original shape when a force or load is applied. Compression strength
is an important physical property defined as a unit of force applied over
an area usually expressed as pounds per square inch (psi). All polyiso
products in general have a minimum compressive strength of 16 psi. Actual
compressive strength may vary above the minimum depending on the
manufacturer.
Polyiso is a
thermoset material which stays intact during extended fire exposure and
thereby meets many necessary ratings dictated by many building codes. The
testing and evaluation of polyiso to show conformance with code
requirements is conducted by various national agencies:
Center for Applied
Engineering, Inc.
ETL Testing
Laboratories, Inc.
Factory Mutual
Research Corporation
Inchcape Testing
Services, Inc.
Omega Point
Laboratories, Inc.
RADCO
SGS U.S. Testing
Company, Inc.
Southwest Research
Institute
Underwriters
Laboratories, Inc.
Warnock Hersey
Laboratories
In general
polyiso products:
Deliver the
highest R-value per inch of thickness.
Are moisture
resistant and water repellent.
Are resistant to
many types of solvents.
Possess
dimensional stability.
Demonstrate
excellent performance in fire tests.
The foregoing was
condensed from Technical Bulletins authored by the Polyisocyanurate
Insulation Manufacturers Association. |
Isophthalic Polyester
Resin (Iso Polyester)
Liquid crystal
polymers (LCPs) are a unique class of wholly aromatic polyester polymers that
provide previously unavailable high performance properties. In particular, they
are highly inert chemically and highly resistant to fire. ~wikipedia
Iso Polyester is perfect
for fabricating dimensionally stable corrosive-immune service parts. Also a
durable repair material it is often used in tank linings. Resistant to exotherm
and other post cure problems, properly fabricated parts may be used in food
contact applications. ~www.fibreglast.com
A
resin with exceptional physical strength properties, excellent handling
characteristics, high heat resistance (up to 300 F for many conditions),
outstanding corrosion resistance, and is FDA approved. Applications include
fabrication of tanks, pipes, tooling, and parts requiring high-strength
retention, corrosion resistance and durability. ~www.mertons.com
Iso
Polyester is used where strength and durability are a must. Experiences lower
shrinkage and a higher heat distortion temperature than orthophthalic type
polyester resins. ~www.shopmaninc.com
Isophthalic polyester resin is fire retardant and meets the requirements for
Class 1 flame rating of 25 or less per ASTM E-84. ~www.mcnichols.com
Isophthalic polyester resin with a Class 1 fire retardant rating has an ASTM
E-84 flame spread rating of 25 or less and low smoke generation. ~www.structuralfiberglass.com
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