EI-Akel,, A. (2003). APPLICATION OF LOW DENSrTY POL YETHYLENE FILMS: 1· THEIR MECHANICAL, PHYSICAL AND AN IMICROBIAL PROPERTIES. Journal of Food and Dairy Sciences, 28(3), 1865-1877. doi: 10.21608/jfds.2003.243999
A. T. EI-Akel,. "APPLICATION OF LOW DENSrTY POL YETHYLENE FILMS: 1· THEIR MECHANICAL, PHYSICAL AND AN IMICROBIAL PROPERTIES". Journal of Food and Dairy Sciences, 28, 3, 2003, 1865-1877. doi: 10.21608/jfds.2003.243999
EI-Akel,, A. (2003). 'APPLICATION OF LOW DENSrTY POL YETHYLENE FILMS: 1· THEIR MECHANICAL, PHYSICAL AND AN IMICROBIAL PROPERTIES', Journal of Food and Dairy Sciences, 28(3), pp. 1865-1877. doi: 10.21608/jfds.2003.243999
EI-Akel,, A. APPLICATION OF LOW DENSrTY POL YETHYLENE FILMS: 1· THEIR MECHANICAL, PHYSICAL AND AN IMICROBIAL PROPERTIES. Journal of Food and Dairy Sciences, 2003; 28(3): 1865-1877. doi: 10.21608/jfds.2003.243999
APPLICATION OF LOW DENSrTY POL YETHYLENE FILMS: 1· THEIR MECHANICAL, PHYSICAL AND AN IMICROBIAL PROPERTIES
Food Technology Dept., Fac. Of Agrlc., Cairo Univ.
Abstract
This study was carried out to evaluate low density polyethylene (LDPE) films, of 180 microns thickness. when impregnated with potassium sorbate or calcium propionate (at the concentrations of 1 ,2,3 and 4% w/w) which were processed by the blown film extrusion process. LOPE films were examined tor their ppysical properties (i.e. haze, gloss, waler vapor permeability, oxygen permeability, heat seatability and shrinkability) besides, their mechanical properties (I.e. tensile strength, elongation, slip, tear Slrength and burst slrength). Mechanical and physical proper1ies were significantly affected by the inccrpcration of potaSSium sorbate or calcium propionate up to 4% (wJw) in the films as their haze, Willer vapor permeability, slip and burst strength increased. while their gloss, heat sealability, shrinkability tensile strength, e/ongaoon, tear strength and oxygen permeability decreased as th~ concentration of potassium sorbate or calcium propionate increased in the films. LOPf films were also tested against some species of microorganisms on agar plate medium, from whICh it was noticed thai, the inhibitory effect of !he films agajnslthe growth of AspergiHus nevus, Fusarium oxysporium, Penicillium chrysogenum OSM 844 in a disk test was higher than thai in case or BaciHus suM/is, E. cO/i and S. eureas as the concentration of potaSl;ium sorb ate or calcium propionafe Increased up to 4%.
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