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PREMIXING OF INGREDIENTS
Additives
- Alloys - Antioxidants - Blends - Colour Pigments
Compatibilizers - Composites ingredients
This is made either by batches in an AXON High Speed Propeller Mixer or in an AXON continuously operated Intensive Mixer or both methods in named order.
Fillers
- Fibres - Fire retardants - Lubricants
Masterbatches - Plasticisers - Other additives
When the batch
or batches of incorporated ingredients are premixed they will be delivered
to the extruder for compounding to pellets as follows:
There are two methods of compounding, namely the String-Pelletising and
the Die Face Cutting. The later method is used when very high content of
unmeltable fillers shall be used and the polymer allows this technique.
- For Masterbatch
Colour Concentrate and other additives.
- For Film Blowing
and bag making directly from the Extruder.
- For Pipes,
Tubes and Profiles.
- For Sheet
Extrusion.
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A complete Turn-Key
Factory is showed on the Lay-Out.
Most of today's
rejects are reclaimed just by shopping them in a granulator.
The IN-HOUSE RECYCLING is essential
Filtering
during re-processing through an automatic screen-changer: Film recycling directly from the film spool: In our newsletter No. 30 an example of film scrap recycling directly from the film spool is illustrated. In this case the reclaimed material is fed as film directly into the extruder and goes as strings to the pelletiser.
The recycling of film scrap from edge-trims on reels is usually made parallel with other recycling work.
composites, alloys and blends, which are out of standard.
The most important difference between recovery by cold grinding and
recycling through melting and plasticising of the regrinds is the thermal reprocessing and the better homogenisation through plasticising of the regrinds, but also the filtering of the melt by an automatic screen
changer.
All dirt will stay in the filter and first class pellets will be produced for reuse. It is this recycling that makes the rejects to new
first class pellets.