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TRIPOR
200(LOW Density)
Polyurethane Foam
'Tripor
200' is a
low density, rigid foam system which may
be used
to manufacture mouldings. It
is also suitable
for structural infill of fibreglass
components, and relies on the thorough mixing of two
low viscosity
liquids by cither hand or machine mix
techniques.
'Tripor
200'
contains no CFCs or HCFCs and therefore has an Ozone
Depletion Potential
(O.D.P.) of zero.
FOAM MANUFACTURE
The foam
is produced by the mixing together of the two Components A and B at a ratio of I
to 1.16 by weight or 1:1
by volume, it is vitally important that
quantities are accurately
measured
before mixing
thoroughly. In hand mixing the Component A should be pre-mixed for at least
one
minute to aerate it,
before mixing with the Component B.
After mixing the foam should be
immediately
transferred to the mould or cavity to be
filled. It is essential for the foam to
be
restricted
and not allowed
to rise freely.
The foam should be processed
between
the
temperatures of 18 -
25"C.
Lower temperatures
will give a slower reaction, higher
temperatures
faster. Reaction times
will
also be affected by the bulk mixed,
larger amounts will
give shorter
times, small amounts longer
times. Surfaces
in contact with the rising
foam should be at a temperature of at least 25°C.
The
following times arc typical for a Quality Control procedure for the checking
of cream,
string and
rise times,
and measurement
of the free
rise density. The test should be conducted
at a temperature
of
20°C, using 32.4grams
of Component A and 37.6grams
of Component B mixed together in a cup
of approximately 660ml.
volume, stirred
intensively for 10 seconds using a bench stirrer rotating at
2000rpm.
Immediately after mixing, the chemicals
are transferred to a second 660ml
cup.
Cream
Time 15-20 seconds (from start of mixing to start of rise)
String Time 150-190
seconds (from start of mixing to when a thread
can be drawn
from rising foam with an inserted
rod
Rise Time 250-300
seconds (from start of mixing to end of rise)
Density (Free rise) 40-42kg/M3
(weight of cups contents
divided by volume of cup
after
trimming foam back to top of cup)
Core Density (Free
rise) 36-38kg/M;3
(density of piece cut from foam core)
Ratio 1:1.16 (by weight)
STORAGE & HANDLING
It
is extremely important that
the containers should be re-sealed
immediately after use to
prevent the
entry of moisture which
will adversely affect the resultant
foam. The shelf life of the materials is
four months when stored
in sealed drums within the recommended
temperature
range of 10 • 30°C,
but users
are recommended not to hold in stock longer than necessary.
PLEASE SEE THE SEPARATE MATERIAL SAFETY DATA SHEETS
BEFORE
USING THESE PRODUCTS.
The data contained in this sheet is to bur knowledge true and accurate but
recommendations
are made
without guarantee or warranty since
application and conditions are outside our control. It is
suggested that users should carry out their own tests
to ensure Tripor' meets their requirements.
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