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09-18-2012

Color Masterbatch

Food Colorant Meets Bio-Based Plastic

Color Masterbatch

Combining plastics based on renewable raw materials with food colorants opens up new ways of achieving closed loop recycling. This has inspired the Grafe Group, Blankenhain, Germany, to develop a range of corresponding color masterbatches which it is presenting at Fakuma for the first time.

The silica (SiO2) encapsulated colorants (SECs) from Sensient Imaging Technologies GmbH, Bitterfeld-Wolfen, Germany, greatly restrict migration in plastics formulations. Silica was chosen because this natural material is found in foods and is approved for food applications. The silica matrix – a protective layer encapsulating the colorants – limits the oxidizing effect of oxygen on the colorant molecules. This improves the colorants’ resistance to solvents, water, pH, and environmental influences. At the same time, it reduces migration of the colorants out of the matrix. A wide range of natural and synthetic food colorants is available for the production of different color masterbatches. The coloring has been tested in various polymers, and this has led to the development of several color combinations, e. g. brown, green, orange, yellow, red and purple.

Company profile

Grafe Advanced Polymers GmbH

Waldecker Straße 21
DE 99444 Blankenhain
Tel.: 036459 45-0
Fax: 036459 45-145

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