Abstract:

Taking transparency, dissolving speed, water vapor permeability (WVP) and oil permeation coefficient as the indexes, the effects of solid-liquid tatio, thickener (CMC and sodium alginate), glycerol and besswax on the prformance of films were discussed, and a kind of edible films made from dietary fiber with low cost and good performance was developed. Through single-factor and orthogonal tests, the best ingredient compositions are confirmed as followes: solid-liquid ratio 1:35, thickener 1% (the raito of CMC to sodium alginate is 3:1), glycerol 1.5%, and beeswsx 0.5%. The transparency, dissolving speed, water varpor permenability and oil permeation coefficient of films processed under the above formula are 13.872%, less than 30 s/g, 0.612 g·mm/m2·d·kPa and 4.016 g·mm2·d, respectively.

Key words: edible films, bean dregs, soybean dietary fiber