Cooking foil bags wrinkling is what reason, solve!

Cooking foil bags used in food packaging, general cooking foil bag shell is slightly hardness, but it is the same and some cooking foil bags produced has wrinkled, this is what reason is caused? Cooking packaging sterilization processing later they wrinkle in the form of any compound packing bags are good flatness and require color real, open sex is excellent, high temperature cooking bags, is no exception. There are three kinds of the wrinkling: 1) Chap, base material with composite substrate surface smoothness is poor. 2) Printing substrate on the longitudinal, horizontal or irregularity of wrinkles. 3) Printing base material shrinkage, shrinkage and compound base material separation, there is air, in the form of a state, often peel strength is very poor. Cooking foil packing bags after sterilization surface wrinkling factors found on the surface wrinkling phenomenon should be carefully observed and make an accurate analysis, if the printing substrate on the longitudinal, horizontal or no regularity of wrinkles. Mainly from three points to consider analysis: 1) Winding coil roll paper core is not smooth, winding product volume increases constantly, longitudinal or transverse buckling will occur at the bottom of the winding, make originally smooth printing base material is not smooth, this kind of phenomenon to crinkle in the composite process is not easy to eliminate. 2) Cooking foil bag printing when the drying temperature is too high, rolling constant tension winding with inconsistent, rolling tension is too big to PET film or deformation occurred. 3) A foreign body steaming aluminum bag printing roll traction or too dirty, printing substrate through lateral sliding, foreign body when sliding base material after embossing roller, are generated frown, the wrinkles have regularity, a have no one. Above is about cooking foil bags wrinkle reason analysis, was first produced cooking foil bags are flat, if wrinkles and see if it is caused by the above reasons.
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