Study on properties of calcium propionate modified polyvinyl alcohol packaging films

Different concentrations (0².5g/100 m L) calcium propionate were adding on polyvinyl alcohol (PVA) to prepare the calcium propionate modified polyvinyl alcohol packaging films.The results showed that calcium propionate had a good compatibility with the polyvinyl alcohol films, and the films had a good heat resistance.Calcium propionate increased the tensile strength, water vapor permeation coefficient, swelling ratio and dissolution rate of the films;reduced the breaking elongation of the films and affected the optical properties, the sealing temperature of the films.Concentration of 2.5g/100 m L calcium propionate modified film produced a certain inhibitory effect on Bacillus cereus, E. coli, Aspergillus oryzae. Calcium propionate modified polyvinyl alcohol films had a good packaging performance and some antibacterial properties, could be used as a novel food packaging material.