As for the internal lubrication of lubricant, as far as PVC is
concerned, it can be regarded as the same kind of material as
plasticizer, which plays a role of plasticization or softening. The
difference is that the lubricant has a lower polarity and a longer
carbon chain. Therefore, compared with plasticizers, the
compatibility of lubricants and polyvinyl chloride is significantly
reduced. It is precisely because of the low compatibility of
lubricants and polyvinyl chloride ( And there is a certain
compatibility), so only a small amount of lubricant molecules can
penetrate between the molecular chains of the polymer like
plasticizers, weakening the mutual attraction between the molecular
chains, and when the polymer is deformed, the molecular chains It
is easier to slide and rotate with each other, while not
excessively lowering the glass transition temperature of the
|Product||High density Oxidized Polyethylene Wax OP-25|
|Acid Number||25 mg KOH/g|
|Hardness @ 25°C (77°F)||＜1|
|Application||PVC lubricant, PVC stabilizers|
|Equivalent grade||AC 316A, Luwax OA6|
1. Without any effects on the fusion time.
2. Improve the melt flowability.
3. Without any effects on transparency.
4. Provide lubricating property without lowering melt-strendth.
What happens if the PVC lubricant is not used well?
The role of PVC lubricants in PVC processing is no less than that
of stabilizers. Its use generally needs to follow strict
principles, such as internal and external slip balance, moderate
Unbalanced internal and external lubrication.
Too much external slippage, although the extrusion speed is fast,
but the material is easy to produce, poor plasticization; too much
internal slippage, large extrusion volume, the material
plasticization is not good. If the initial lubrication is not good,
the extrusion torque will be too large. Insufficient lubrication in
the later period will lead to insufficient lubrication in the screw
homogenization section, compression section, and die section, and
the material shears violently, which will affect the surface
quality and internal performance of the extruded product.