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When
IBC systems are used with oscillating dies, the problem of
poor layflat quality is more evident. The correct solution
is to verify airflow in the oscillating plenum is completely
stable (within 0.05 inches of water column) for all operating
positions.
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To
verify you have a plenum problem, turn off the die oscillator
and see if the roll looks like this. Then turn the oscillator
on and see if the rolls get worse. |
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It
is possible to achieve tubing rolls that look like this. See
the August 2002 issue of Blown Film Internals for ways to solve
this problem. |
