| Overview |
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Handling
of
highly
viscous
melt
is
often
one
of
the
key
problems
in
the
polymer
production
industry.
Sulzer
has
the
right
equipment
and
the
right
application
know-how
to
handle
any
problem
that
arises.
More |
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| Homogenizing
Polymer Melt
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In
order
to
enable
uniform
polymer
granules
to
be
formed,
it
is
essential
that
the
polymer
melt
stream
is
homogeneous
prior
to
pelletization.
The
mixer
equalizes
gradients
of
viscosity
temperature
and
colour
as
they
normally
appear
in
laminar
flow
conditions
in
an
empty
pipe.
More |
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| Blending
/ compounding
of two polymers
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Two
different
polymer
streams
are
mixed
together
to
form
a
polymer
with
unique
characteristics.
Considering
pressure
drop,
mixing
element
length
and
sometimes,
shear
rate
and
residence
time
as
parameters,
the
required
homogeneity
can
be
designed
by
our
experienced
engineers.
More |
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| Admixing
of master batch
into polymer
melt
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A
common
way
to
incorporate
additives
into
polymer
melt
is
to
use
a
masterbatch,
since
solid
additives
(e.g.
Si02)
can
not
be
admixed
in
a
melt
stream
directly.
In
such
a
case,
the
masterbatch
must
be
fed
via
a
small
side
extruder
into
the
polymer
main
stream.
More |
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| Dispersing
of non soluble
components
in polymer
melt
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PS
foam
after
admixing
of
water
as
striping
agent
with
a
Sulzer
SMX® |
Insoluble
additives,
or
high
concentrations
of
additives
which
are
partly
soluble
are
perfectly
dispersed
with
the
Sulzer
Static
Mixers.
Normally
these
additives
are
of
very
low
viscosity
(water-like).
Therefore
the
viscosity
ratio
to
the
polymer
melt
is
normally
>
1:106).
The
Sulzer
mixer
geometry
along
with
the
special
Sulzer
distribution
device
has
proven
its
efficiency
for
these
applications
in
many
industrial
references.
Our
engineers
are
capable
of
designing
the
mixer
in
such
a
way,
that
the
required
shear
force
in
the
mixer
is
big
enough
to
overcome
the
surface
force
in
order
to
form
the
required
droplets.
More |
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| Admixing
of low viscous
additives
in polymer
melt
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Sulzer
polymer
mixer
designed
for
direct
connection
to
the
2nd
stage
devolatilization
vessel
outlet. |
Many
additives
used
in
the
polymer
production
industry
are
of
low
viscosity
and
are
only
partly
soluble
in
the
polymer
stream.
Normally,
the
homogeneity
requirements
are
very
high,
since
the
polymer
is
often
pelletized
immediately
after
the
static
mixer.
More |
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| Cooling
of polymer
melt
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SMR
mixer
/
heat
exchanger |
Cooling
of
a
polymer
melt
or
solution
is
a
difficult
application
as
the
viscosity
of
the
product
between
in-
and
outlet
increases.
In
some
cases
this
effect
could
be
very
pronounced.
There
is
also
danger
of
maldistribution.
Sulzer
India
has
the
know-how
to
find
a
solution
for
this
difficult
task
and
will
accordingly
design
the
most
appropriate
heat
exchanger.
More |
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| Heating
of polymer
solution (1phase
and 2 phase)
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SMXL®
multitube
mixer-heat
exchanger |
Polymer
solutions
are
in
most
cases
very
heat
sensitive
to
excessive
heating.
Accordingly,
heating
of
such
a
product
should
be
carried
out
within
a
short
time
and
with
a
narrow
residence
time
distribution
in
order
to
get
a
good
quality
of
the
product.
The
heat
exchanger
SMXL®
monotube
and
SMXL®
multitube
are
best
suited
to
fulfil
this
specification.
More |
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| Devolatilization of polymers
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Devolatilisation
processes
are
important
in
the
production
of
high
quality
polymer
products.
After
the
Polymerisation
process
the
product
mostly
does
not
contain
a
pure
polymer,
but
a
mixture
of
unreacted
monomers,
oligomers,
solvents
and
other
impurities.
More |
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| Exothermic
Reaction
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Sulzer
Mixer
Reactor
(SMR®)
provides
excellent
plug
flow
characteristics
and
offer
high
and
controllable
rate
of
heat
transfer
owing
to
the
largest
heat
transfer
area
in
the
industry
per
unit
volume.
A
suitable
combination
of
mixing
effects
and
heat
removal
maintains
high
driving
forces
for
reaction,
narrows
residence
time
distribution,
reduces
dead
space,
suppresses
side
reactions
and
favors
high
conversion.
More |
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| EPS
/ Expandable
polystyrene
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Expandable
polystyrene
(EPS)
are
small
polystyrene
pellets
or
beads
containing
some
dissolved
liquid,
in
most
cases
pentane,
some
times
butane.
The
dissolved
liquid
serves
in
the
later
processing
stages
as
a
foaming
agent.
More |
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