Abstract: With the rapid growth of application of film material in packing industry,the study on gas permeable ability in different kinds of condition is effectively pushed.In order to figure out the performance of gas permeability in nonstandard temperature,this paper introduces a new method of data fitting.It is based on least-square principle and matlab and visual c++ is used to mix programming,so that it can make good use of the two tools.The data fitting platform can perform widely,and it brings a va...

Key words: film； permeability； data fitting； forecast；