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As we all know, once some food packages are opened, the food inside is easy to damp and deteriorate just because its exposed to the air and we cant seal the open place again. So we should consider this shortcoming when we design the package. A solution to this problem is that using the two angle folds in the seal place and folding them inside after we getting the things inside. Combined with the way traditional Chinese packing drugs, this method can avoid air to enter effectively and keep the food flesh.
Mingming Wang, Kunpeng Wang，Jian Chen，Xiumin Lin，Hanchao Li，Yang Li，Lingyan Xie，Jingwen Yu，Yuan Gao，Peinv Xu，Yiyun Xu ，Pan Wang