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Plastic bags can be made of different polymer types such as:

High-Density Polyethylene (HDPE)

Medium-Density Polyethylene (MDPE)

Low-Density Polyethylene (LDPE)

Linear low-density polyethylene

Higher density polyethylene polymers have stronger cross-links for linking large chains to another which is usually how plastic bags are able to stretch more and can hold heavier objects. Hence being stronger.

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13y ago

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