Influence of the Parameter of Micro-holes and Temperature on the Gas Transmission Rate of Micro-perforated Film

Abstract

Micro-perforated film served as modified atmosphere packaging has the function of spontaneously regulating gaseous composition in packaging and prolonging the shelf life of fruits and vegetables, so public attention has been widely received recently. However, to develop high-oxygen permeable films having a tailored property is still challenging. In this work, the container covered by various micro-perforated films were placed in a controlled atmosphere box with different gaseous composition and temperature, and the O2 and CO2 concentrations in the container were tested regularly by the head-space analyzer, thereby the gas transmission rate of the micro-perforated film under different conditions could be calculated. The effects of micro-hole diameter (D), hole numbers (n), the distance between micro-holes(L) and temperature on the gas transmission rate of micro-perforated film were studied. The experimental data showed that when L6D, the influence of the distance between micro-holes could be neglected, and the number of micro-hole on the gas transmission rate is more pronounced than that of the diameter of micro-hole because of the end effects within the same area of micro-holes, besides, the gas transmission rate of the micro-perforated film seems not to be severely affected compared with non-perforated films by temperature from 4℃to 35℃. This work could provide greater reference value for the fresh-keeping application and preparation of the micro-perforated film.