US Department of Agriculture (USDA) Eastern Research Center announced that its team has developed a new type of packing materials.This material is made from the milk protein "casein", which can be eaten directly and can be naturally decomposed.The emergence of such packing materials will largely depend on the problem of environmental pollution of food packing bags.

The team added pectin to the lemon and lime peel to create a transparent membrane. Pectin is a substance that makes the fruit sticky.Finished products like plastic film, but not easy to stretch, than the general packaging materials, low-density polyethylene (LDPE) oxygen-resistant 500 times.Degradable packaging materials made of starch are now commonly used, but due to serious oxygen permeability of materials, does not apply to food packaging.The packing machine will use this packaging material

Perfluorocompounds (PFCs, once a food packaging), once considered safe packaging materials, are now banned, so food packing made of casein and pectin should be useful.