The slitting process is a very critical in
the production of plastic film, composite packaging, printing and other
industries. The slitting process is generally the last step before packaging,
and the quality of slitting will directly affect the quality of the product.
Longitudinal stripes often appear on the surface of the protective film rolls
while slitting rewinding. What are Reasons for this phenomenon?
During the slitting/rewinding process, a
large amount of air is trapped and the cumulative thickness tolerance is not
good, which is the main causes of the occurrence of longitudinal stripes. Once
serious stripes appear, it is difficult to eliminate them. Another reason is
that the slitting speed is too fast. Longitudinal stripes and cross-layer
quality problems are most likely to occur at high speeds.
For equipment that requires high operating
accuracy, after a long period of continuous use, the operating accuracy of some
parts has declined. For large high speed slitting machine, it is more difficult to ensure the
running accuracy due to the larger running parts. And because the plastic film is
a polymer product, and its thickness is very thin. It is more likely to be
damaged during processing. Therefore, once the running accuracy is not enough,
it is easy to produce quality problems such as longitudinal stripes. For this
reason, you should be cautious when replacing equipment parts and accessories.
It is advisable to choose durable and high-precision parts, and you must also
ensure a certain degree of precision during installation, otherwise it will be
difficult to meet the operating needs of the slitting machine.
