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Moore & Munger offers a wide range of waxes which are
used as lubricants for processing of PVC. Their function in
PVC varies from being very external to internally lubricating
and is dependent on the molecular structure of the lubricant.
Non-polar lubricants are externally acting and used primarily
for processing of rigid PVC in applications where clarity
is not a critical factor. They are generally incompatible
with the PVC, delay fusion, and reduce sticking between the
metal surfaces of the extruder and the resin.
Polar lubricants are more compatible with the PVC resin and
promote better fusion during processing. They are generally
based on esters, carboxylic acids and acid soaps.
Specialty lubricants are those products which cannot readily
be classified as external or internal. Their functionality
is more complex and they, therefore, cannot be categorized
by conventional methods.
Multi-component lubricants provide the convenience of reduced
inventories, reduction in weighing errors and improved dispersion
of micro-ingredients. These factors can lead to improved batch
to batch consistency.
A good lubricant system often requires the addition of several
components in order to obtain the desired processing properties.
Specific recommendations will depend on the overall composition
and desired properties of the end product.
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