Investigation of Active MAP Film with Menthol on Sugar Orange Preservation

摘要

In order to develop film which can extend shelf life of sugar oranges at room temperature to solve the problem of preservation, this experiment used three kinds of polymer materials (LDPE, EVA and SBS) and menthol fresh-keeping agent to made four kinds of fresh-keeping films. Raw material mixed in different proportions and in turn through the granulation and extrusion process. Under room temperature (T = 20 °C, RH = 70%), experiment was carried out on the preservation of sugar orange. The test and analysis of experiment samples were carried out with the headspace gas, weight loss rate, hardness, color, soluble solids, titratable acid, Vc, sense and taste. Results showed that preservation effects of LDPE films containing menthol were best, the shelf life of sugar orange could be extended to more than 20 days. Preservation effects of SBS-EVA modified LDPE films were also better in the films without preservatives.