We know, must want to have with the data that packages at food cut off appropriately quality, if grease food asks sex of tall block oxygen and block are oily; Wet sex of tall block of dry food requirement; Sex of peculiar smell of tall block of balmy food requirement; And fruit, greengrocery is fresh food asks to pack those who have certain oxygen, carbon dioxide and vapor to pass through a gender again; Want to have good physical machinery performance at the same time, basically include the tensile strength of material, tear strength, impact strength; Have good chemical stability even, do not answer with inside outfit food produces any chemical reaction, in order to assure the safety of food. Have even taller be able to bear or endure lukewarm sex, suit the characteristic such as the high temperature disinfection of food and microtherm deposit.

At present so the food on the market is packed pack with compound plastic film mostly give priority to, especially tall cut off the principal part that material already made food pack. Contents should consider to protect above all when be being chosen so qualitative, last, the demand that keeps local color. Be in at the same time choose plastic film (bag) when, must know plastic concerned property adequately, accomplish reasonable choose.

Should notice particularly, the plastic film that is used at food to pack (bag) what must accord with relevant data is plastic shape taste wholesome standard.



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