EXTRUDERS FOR SPECIAL APPLICATIONS

PET waste reprocessing
PET washed bottle flakes and other PET waste sorts can be recycled obtaining regenerated granules for injection moulding, or converted into products (e.g. staple fibers, sheets, …) in an integrate one-step continuous processes.
Our know-how on PET waste reprocessing is focused on plants for production of regenerated granules for injection moulding and other applications, but also on integrated solutions for direct recycling into products with an I.V. (Intrinsec Viscosity) drop due to de-polymerization very limited.
A minimum contents of moisture in the melt causes a significant decrease of I.V. with consequent reduction of mechanical properties or even making processes / end uses impossible.
By proper design of extruders (screw geometry, degassing system, etc.) de-polymerization can be dramatically limited or avoided; Comac, developed highly – performing and reliable dryerless solutions for PET waste extrusion applied in cooperation with major manufacturers of downstream line sections.

Hot Melt
Among other application fields, extrusion plants for production of hot melt (sticks or granules) represent an interesting example in which sophisticate configurations of dosing system and extruders themselves are the key-points for achieving desired product characteristics by complex formulations, involving a variety of ingredients.