CaCO3

The concentrates contain between 70-85% of fine, treated CaCO3 that combines different types of resins.

Benefits:

- a 3-20% cost saving in raw materials, depending on the precentage of concentrate used

- better bubble stability, increased production efficiency and easier transformation

- increased impact and tear resistance

- improved the barrier effect against humidity and oxygen

- modifies the surface for improving the anti-blocking effect, printibility and weldability 

Increased productivity:

- CaCO3 increases the thermal conductivity of the extruded product, providing faster heating and cooling of the polymer

- improved extrusion processability/transformation and performance

- improved manipulation and transformation

- significant increase in line speed and reduced processing times

Improvement in physical properties:

- improved impact resistance

- increased stiffness and tear resistance

- improved film sealing

- increased the barrier against humidity and oxygen

- improved printing

- provides anti-blocking effect

Usage recommendations:

- applying CaCO3 does not require modification in the production process

- the MB concetrates produce an off-white appearance in films without pigmentation, which decreases the content of TiO2

- coloured films may appear with lighter colour. This is fixed by reformulating the colour masterbatch, without increasing the addition rate

The ideal feed systems are:

- gravimetric feeder

- volumetric feeder

- centralised mixing stations also work well