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| |
| 1 |
Rubber mill |
| 2 |
EPDM milled material |
| 3 |
PP |
| 4 |
Feeding into the main feed |
| 5 |
Additives |
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| 6 |
Vacuum degassing |
| 7 |
Softeners, cross-linking agents |
8 |
Softeners, alternative position |
| 9 |
SWZ screen pack changer |
| 10 |
UG underwater pelletizer |
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| TPE-V |  |  |
The vulcanization and dispersion of EPDM, and in some instances the incorporation of large quantities of softener (> 40%), require a processing length with an average L / D = 56. However, the production machines have a wide range of processing lengths, from L / D = 45 and L / D = 68. Depending on the starting materials and the cross-linking system, the confiuration of the processing section is matched to the reguired processing stages.
| - | | Grind EPDM in bale form, powderize, convey and feed gravimetrically into the feed on the ZSK |
| - | | Feeding of additives, fillers and thermo-plastics gravimetrically into the feed |
| - | | Feeding the softener, metered gravimetrically, at one or more points along the processing section to the ZSK |
| - | | Melting, dispersing, cross-linking, mixing, phase inversion |
| - | | Degassing of volatile components, ideally via Twin-screw side-degassing unit ZS-EG |
| - | | Screen pack changer |
| - | | Pressure build-up using gear pump for very high-viscosity melts |
| - | | Pelletizing with underwater pelletizer |
| Recipe components | | |
| - | | PP |
| - | | EPDM |
| - | | Softeners |
| - | | Fillers |
| - | | Additives, pigments |
| - | | Cross-linking agent, accelerators, activators |
| - | | Reclaim |
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