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Cavitated BOPP

BOPP mineral masterbatch

Cavitated BOPP (Biaxially Oriented Polypropylene) is a type of film used in the food industry to manufacture packaging for ice creams, chocolate bars and bottle labels, among other things.  

 

The main feature of this film is the microcavitations – tiny cavities – that are created during film manufacture. The objective of the cavitated BOPP is to maintain the opacity standards and mechanical and printing properties required for every type of packaging, yet reducing the density and making it lighter.

 

In order to obtain the microcavitations, the film is oriented biaxially once it has been extruded; it is stretched vertically and horizontally, creating microscopic cavities. This biaxal orientation process reduces the density of the film and gives it the pearly appearance that is typical of BOPP film.

 

The GCR Group has developed Granic mineral masterbatches with different calcium carbonates (CaCO3) that are very fine, with a very narrow particle distribution curve with the possibility to metallise the final film. These masterbatches also facilitate and improve the creation of microcavitations.

 

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