DISPERSION COATING OF PAPER WITH HYDROCOLLOIDS FOR THE IMPROVEMENT OF BARRIER AND FUNCTIONAL PROPERTIES OF PAPER

Abstract

Increased environmental concerns over the use of certain synthetic packaging and coatings in combination with consumer demands for both higher quality and longer shelf life have led to increased interest in alternative packaging materials research. The present investigation deals with the preparation of coating formulation from the source of Naturally renewable biopolymers as a coating solution for barrier and functional of paper packaging paper. These biopolymer coatings may retard unwanted moisture transfer in food products, are good grease and oil barriers as well as heat sealable, biodegradable, and have potential to replace current synthetic paper and paperboard coatings. In the present investigation mainly focused on two approach, first Acrylics based water soluble polymer with the addition other coating additive and second Fully Natural bio-based polymer with the addition of some coating additive like plasticizer etc. these approach are used to get the required properties. The various coating formulations are used on laboratory scale to find the suitable materials to fulfilled the required properties for packaging grade paper. Natural renewable biopolymer mainly hydrocolloids are used as a barrier coating solution, these polymers are polysaccharides based like Chitosan, Oxidized starch, Sodium Alginate, carrageenan and protein based Gelatin are used to formulate new pathway for fully bio-based paper coating. The results obtained from laboratory data are found to be very interesting and seems very promising.