 | Why Use Anti-Block Masterbatches : Antiblock Materbatches are routinely added to film and bags to keep the sheets from sticking together. These are used to lessen the adhesion of the surface of products made from the formulation of like or different surfaces. These Masterbatches act by producing a slight roughening of the surface. Typically, antiblock additives are finely divided, solid minerals, but some are waxes. Antiblock agents are mainly used in film extrusion. Many types of antiblock are available, ranging from synthetic silica formulations to give high clarity, through natural silica to offer high performance where cost is important and clarity can be compromised, to calcium carbonate where simple antiblocking without clarity is required. For speciality applications more esoteric systems are available such as organic based antiblocks. Antiblock masterbatches can be produced in a wide range of polymers including polyethylene, polypropylene, ionomers, polyamides, thermoplastics polyurethanes and others. Combinations with antiblock and slip products offer cost effective products for use in the film industry. AddKan Anti-Block Masterbatches : AddKan Anti-Block masterbatches are added to the plastic to minimise this adhesion and so lower the blocking force between layers. Once compounded into a plastic these additives create a microrough surface which reduces the adhesion between film layers and lowers the blocking tendancy. Two factors determine the antiblocking effect:
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