Polypropylene nano-composite with superior barrier properties

The Challenge / Concern:

Polypropylene (PP) is used for packaging of several items. One of the clients was seeking improvement in its barrier properties by virtue of packaging. If the material has lower transfer rates for moisture and gases such as oxygen, nitrogen and carbon dioxide, this material can be effectively used for food packaging due to advantageous mechanical properties.

Brief (and non-confidential) Solution

We already had conducted vast trials for polymers and their composites for improving the gas barrier properties. The fillers of interest as concluded are nanoclays like MMT or bentonite, graphene and oxides. For PP, best results were obtained by reinforcement of the surface modified filler. Surface modification of all the fillers is widely discussed in the literature. The optimum composite formulation and processing was concluded. This protocol yielded desirable ranges of water vapor transfer rate & gas transfer rates through melt processing as well as solution processing.

Service / Project: Consultation, Joint Development

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