Abstract
In this paper, modified atmosphere packaging (MAP) film of fruit and vegetable was prepared through extrusion blow molding process.The LDPE was used as matrix resin and medical stone powder as the main filler. Stearic acid was added into film as a kind of surfactant. Effect of particle size, stearic acid proportion,filler amount and stretch pocessing on properties of MAP film was studied through measuring its oxygen and water vapor permeability,tensile strength as well as elongation ratio.Experimental investigation indicated that for preparing MAP film with high permeability, the controlled conditions such as 325 mesh medical stone powder, additive amount of 20 phr with stretch processing, stearic acid proportion of 2/10 were required.
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