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Both OPP bags and PE bags difference 
update:2020-6-5 10:42:23
OPP Bags:

Opp film has higher tensile strength, stiffness, transparency, gloss and printing performance than common PP film.Opp is directional stretchability polypropylene membrane, which has high transparency and brittle characteristics, such as the opp monolithic folded after lateral sealing side and in mouth tongue stick adhesive stickers, when used in products to tear to seal protection on the surface of the skin after the tongue stick it tightly after folded, easy to use, the commonly used color printing, offset printing technology, colour and lustre is bright beautiful generous, widely used in clothing, food, printing, stationery, cosmetics, paper and other industries.Also according to customer needs to print various patterns and punched butterfly holes, aircraft holes.

Properties: hard, unchanged after pull.Non-stretchable (bidirectional stretch) single piece folded in half, side seal welded, the longest length shall not exceed 640m/m.
Advantages: good transparency.
Faults: both sides of the seal is easy to tear.

PE Bags:

PE is a thermoplastic resin made of ethylene by polymerization.Polyethylene odorless, non-toxic, feel like wax, has excellent low temperature resistance (the lowest use temperature up to -70 ~ -100¡æ), good stability, can withstand most acid and alkali erosion, but polyethylene is very sensitive to environmental stress, heat resistance aging is poor.

Properties: Formalin, slightly less transparent.
HDPE: high density low pressure polyethylene, feel brittle, used for waistcoat bags.
LDPE: low density high pressure polyethylene, soft to handle
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