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A new type of thermoplastic bio composite with coir fibre derived from coconut was fabricated by means of plasma modification of the polymer surface. Plasma modification is an effective and eco friendly method to create hydrophilic polymer surfaces. Plasma modified polyethylene (PE) was used as the matrix for coir fibre reinforced composites. The use of compatibilizers, and chemical modification of fibre or polymer is a usual practice to improve the interfacial adhesion and to make the fibre and polymer matrix compatible. Here, plasma modification of PE was introduced as a new method to improve the compatibility. The present study involves the preparation and characterisation of plasma modified PE (PPE) and coir fibre composites. Different preparation methods were followed and the composites prepared by a hot press method proved to be better. The mechanical properties of the composites were compared with unmodified PE/coir fibre composites. The newly prepared thermoplastic composites based on PPE and modified coir fibre showed lower water absorption due to better fiber/matrix interaction. We could observe different kinds of interfaces in the composites. In the plasma modified one, a good wetting of fibre by the matrix eliminated the possible microvoids. Finally, it is important to add that plasma modification of the polymer was found to be an effective technique to improve the compatibility between polyethylene and natural fibre.

Multilayer Polymer Films have significantly enhanced performance properties, allowing films to be made thinner, stronger, and with better sealing properties and are used in a variety of industries. Recent progresses have opened up a range of new possibilities for Engineers and polymer scientists related to the field of polymer processing, polymer films, optics, polymer film capacitors and polymer packaging. In food packaging, for example, polymer laminates are used not only to protect food, but also to retain aroma and flavors, and to extend shelf life.

Polyolefins are the most extensively used category of polymers, counting polyethylene (PE) and polypropylene (PP), which take up nearly 45 % in the global market. These polymers have become the integral part of our day-to-day life because of their multiple applications.