The inner bag of PP bag has good moisture-proof effect.
HDPE: HDPE is High Density Polyethylene. Decomposed from polystyrene (high density) under low pressure with catalytic systems such as chromium / silicon catalysts ... Used to produce plastic bags, plastic utensils with crunchy white opaque properties.
LDPE: Low Density Polyethylene (low density polyethylene). Has transparent plasticity properties.
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