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The material of the heat sealing blister shell is generally PVC, PET
White pp sheet for thermoforming cups, bowls, lids
White Polypropylene blister sheet, is the only plastic box that can be placed in a microwave oven and can be reused after careful cleaning.
The main reason for polypropylene is that PP material is one of the lightest plastic varieties, with a density of only 0.89--0.91g/cm3,
pp It is cold-resistant, freeze-resistant, high-temperature resistant, and can be microwaved. Environmentally friendly materials.