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Masterbatch

Polymer granulates with a high percentage of additives, higher than in the end use, are called masterbatch. Inlaterproduction steps, such as injection moulding, film or fibre production, those granulates are mixed with the raw polymer for colouring or the targeted modification of certain properties. Advantages: In comparison to pastes, powders or fluid additives, using masterbatch increases the process stability. The reason lies in the exactly defined pigment quantity in each granulate. Additionally: Since there is no handling of large powder masses and therefore the environment and the work station are not being polluted, masterbatch is regarded to be a very good processing material.

The Monomexco-rotating twin screw extruder is the heart of a masterbatch line. High dispersion efficiency and self-cleaningare factors that are crucial for masterbatch production. The products comply with the highest demands in quality, as for example required in the production of synthetic fibres.

We give an example of a formulation :

% 30LLDPE (50MFI)

%70Kalsit (CaCO3)

%2,5PE Wax

%2,5Calcium Stearate

Mono and tailor made masterbatch production process is divided into 2 parts . The main colors are studied in mono output . Tailor made so colors that match the colors are made by mixing the desired color by production code.

3 method is used in masterbatch production .

1. Pre- mix,most widely spread production process, a premix consisting of polymer, pigment and dispersionadditives is fed to the extruder. Normally, these premixes are produced in batches in a previous mixing step. Great importance must be given to this premix process. If a mistake happens here, unfortunately, oftentimes it is very difficult to make corrections during the extrusion step. Due to the usage of volumetric feeders, there is a high operational reliability, handling is quite uncomplicated, and the process is very popular as well as low priced.

2.Split-feedversion of masterbatch production, the polymer is plastified first. Then the other formulation components(pigments, fillers and if needed dispersion aids) are added via one or two side stuffers (hot melt extrusion). Feeding is done via separate gravimetric feeders. The handling of the formulation via the extruder or feed control is relatively uncomplicated and does not need elaborate premixing. This makes big scale masterbatch production much easier.

3.Custom Colouring uses an exact mixture of standard colours (monobatches) to produce the required colourmatch. Via a multi-component gravimetric feed system (generally 5 to 8 components) and predefined standard colours, the colour required by the customer is produced. The setup of the extrusion line is similar to the premix system.

Masterbatch production process for which you are targeting the right about that , please contact our company , which used the method.

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