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| TOW TO TOP PRODUCTION PROCESS |
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| Recommendations for the DRYTEX® Tow Breakage
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As a rule the cold breakage will take place if
the capacity of shrinking of the TOPS does not have importance for the
following processes: for example. If it is needed to produce "N" spinning
(fixed 100%). The material in cold breakage is also shrinkable after being in the
breakage process.
Such shrinking, nevertheless, is minor who the obtained one by
hot breakage, and is not possible to influence in it by changing the regulation
of the breaker machine. SO IT IS NOT POSSIBLE TO OBTAIN A PRECISE PERCENTAGE OF
SHRINKING IN THE break in cold TOPS. if the breakage is more violent it can, if
there is not a good calibration, produce a big amount of neps.
As it is known, in the acrylic cable processing, the title of the cold
broken material is around 10% superior to the initial title of the cable,
contrary to what happens in the Hot break.
The mixed of the shrunken TOPS (N) originated from different
vaporized loads work in analogous form as is described in the chapter about the
making of HB spinnings. Additionally is possible to put
attention that when the breakage is done , the minimum distance between
the points of pressure of the last zone must be of 180 mm (measured between the
pinzage points of the ceramic and rubber rollers ). If the distance is smaller,
a enlargment of the material can occur that would originate an increase of the
shrinking.
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6.1 Formation of a material stock before entering to the
staple fiber preparation for problematic cases; like the velvet.
In order to obtain uniform results in the dye it is advantageous
to mix different packages before entering to the staple fibre preparation. That
mixed compensates the irregularities happened in the vaporized that passed
unnoticed. Contrary to what happens in the mixed of the vaporized loads that
compensates the fluctuations of the vaporized of short duration, in this case
the fluctuations are registered in the long duration vaporized, like the
happened ones during different days of the week.
For the formation of the stock the material is stored before
entering the preparation. Only when the last coil or last bump are ready, the
material will be taken to the preparation using a homogenous mixture with the
beginning, the middle and the end of the package.
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