It depends on the content ...

CORDULEN Antiblock-Masterbatches prevent blocking and tacking with the production and further processing of films, coatings as well as co-extrusion layers. Antiblock-Masterbatches also prevent plate-out.

The adhesion between polymer film layers, that complicates the separating of them, is called blocking. With polyolefine extrudates CORDULEN ® Antiblock-Masterbatches create an even micro-rough surface which reduces the direct contact surfaces and acts as spacer between the film surfaces. The colour and the transparency of the film are not influenced.

Different synthetic or natural raw materials are used as anti-blocking additives. For optically high demanding products like BOPP-Film synthetic silicas with a narrow particle size distribution are used in CORDULEN ® Antiblock-Masterbatches. For thicker or opaque films natural silica, talc, or calcium carbonate can be applied too. The choice of the raw materials depends on the desired optical film quality, the thickness and other criteria like combination with other additives.

Food contact approval

In general, nearly all of the active agents are admitted within the usual dosage, according to the BfR-recommendations.
The particular data can be taken out of the product information sheets.
Approvals of other authorities, especially FDA- and EC-approvals are present in most cases and are available, if required.

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