Additive | Antiblock

Antiblock Masterbatch

 

 

 

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.

 

 

Technical Advantages | Shelf Life

 

• Prevents problems of agglomeration of additives or colourants as well as dispersion problems.
• Does not contain solvents and therefore has a longer shelf life.
• Contains an average of 40-65% additive, but the range can reach 15-80% in extreme cases.
• For example, a 25kg bag processes up to one tonne of raw material. Thus, the relatively dilute nature of materbatches allows for greater precision when dosing small quantities.

 

 

Carrier and Dosage

 

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.

 

 

Adverse effects

 

• Adverse effects sometimes occur, such as the separation of the masterbatch from the raw material in the machine hopper.
• The masterbatch, solid or liquid, is added directly to the machine spindle using a peristaltic pump,
• The use of liquid masterbatches also makes it possible to obtain highly precise dosages and rapid colour changes between production runs.

 

 

Antiblock Masterbatch | Transformation processes

 

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:

 

• Anti-blocking performance
• Optical properties (e.g. haze, brightness, transparency)
• Sliding properties
• Surface rigidity
• Scratch resistance
• Filtration as well as dispersion

 

Finally, typical properties using Antiblocking Masterbatch;

 

• Facilitates settlement
• Allows coils to be unwound and cut
• Regulates anti-slip and anti-static properties
• Reduces friction between films
• Increases production on packaging lines

 

 

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.

 

 

 

Contact us.