Antiblock masterbatch consist of a concentrated mixture of pigments and/or encapsulated additives manufactured by heating a carrier resin, which is then cooled and cut into granules. The masterbatch thus allows the processor to colour and give characteristics to the natural polymer economically in the plastics processing process.
The carrier of the masterbatches must be identical/compatible with the polymer. For example, EVA or LDPE is a carrier compatible with polyolefins and nylon, just as polystyrene is used as a carrier for ABS, SAN and sometimes polycarbonates.
In this sense, when the masterbatch carrier is incompatible with the raw material, changes may occur in the properties of the processed material. The processor must specify the characteristics of the raw material. The percentage of use of masterbatches in relation to the raw material is between 1 and 5 %. Colour and additive masterbatches can be combined.
Masterbatches are compatible with most processes, with the exception of rotational moulding, plastisol and other liquid resin systems.
In all types of plastic films for flexible packaging and industrial applications, anti-blocking properties are very important for handling, converting and retailing. Plastic layers tend to stick together, but with the addition of an anti-blocking agent, space is created between the two plastic layers (surface roughness), thus preventing so-called blocking. Most anti-blocking agents are used in films with a multi-layer structure in order to get the most benefit. Some anti-blocking particles act as non-migratory slip agents.
Anti-blocking agents are solid particles and can be categorised as follows:
Source: natural – synthetic
Type: organic – inorganic
Shape and size: irregular – spherical
The selection of a type of anti-lock masterbatch depends on the film properties required, the applications and the polymer used:
Finally, typical properties using Antiblocking Masterbatch;
ADPLAST® provides a wide range of Color Masterbatches with a concentration up to 80% titanium dioxide based on PE, PP, PS, PA, ABS and Polyester. Black Masterbatch range has applicability in: labels, lamination, protective films, coating, agriculture, thin-wall packaging, fibers and nonwovens, bottles, injection-molded articles, etc.
Indeed, we have tailor-made solutions capable of achieving excellent quality-performance ratios.