GSmach offers advanced granulation lines for a wide range of
additive masterbatches.
Additive masterbatches are used in a wide range of applications.
For any type of plastic product
it requires at least two additives to modify its physical or
chemical properties,
such as flame retardancy, thermal stability or weathering resistance.
We design additive masterbatch extruders to suit your
requirements and circumstances.
Table of Contents
Applications
a)Multilayer Films and Sheets
Polyolefins, PVC, PS, PA, PET, CPP, BOPP, BOPET and BOPA.
b) Engineering Plastics
SAN, ABS, PET, PBT, POM, PMMA, PA6, PA66, PC & all reinforced and modified polymers used in injection and extrusion applications.
c) PET
APET, PETG, CPET & RPET used in injection moulding and extrusion and thermoforming applications.
d) Rigid PVC
Window profiles, Sills, Panels, Sidings, Gutters and Pipes.
e) 3-Layer PE Coating for Steel Pipes
Processing of Additive Masterbatch
a) Feeding System
Two types of feeding systems are available:
Pre-mixing processes with volumetric feeders
The ingredients are weighed separately according to the recipe
All materials are then placed in a high speed mixer for 5 to 10 minutes
Discharge of the material into a screw loader
Loading the material into the hopper of the volumetric feeder
Feeding in stages with loss-in-weight feeders: (automatic and more accurate)
Place the material into each trough on the floor
The vacuum loader or liquid pump conveys each component to the storage bin.
The raw material will automatically fall into the loss-in-weight feeder. The feeding system will feed the material into the extruder individually, according to your recipe settings on the HMI.
There are three types of loss-in-weight feeders for liquid, granular and powder materials.
Some additives are sensitive to shear, so the best process is to feed them in stages - via a side force feeder into the fifth barrel of the extruder. The side force feeder is fixed with a water-cooled jacket for melting additive powders with low temperatures.
b) Technical Specifications of Extruder
One extruder should be able to produce many types of additives. It therefore requires a quick-cleaning type of stranded die plate to change the formulation.
The bulk density of the additives is relatively low, so the output depends mainly on the feed capacity rather than the torque of the main motor. Our twin-screw extruders are therefore better suited to this process.
Technical Specifications of Extruder:
| Type | Screw diameter (mm) | Power（kw） | Quantity (kg/h) |
| GS20 | 21.7 | 4 | 5~15 |
| GS25 | 26 | 11 | 5~55 |
| GS35 | 35.6 | 15 | 10~40 |
| GS50 | 50.5 | 55 | 120~200 |
| GS52 | 51.4 | 90 | 270~450 |
| GS65 | 62.4 | 90 | 255~400 |
| GS75 | 71 | 132 | 450~750 |
| GS95 | 93 | 315 | 950~1600 |
| GS135 | 133 | 750 | 2250~3750 |