OPP plastic bags and PE plastic bags - How to distinguish?

What are differences between OPP plastic bags and PE plastic bags? Let’s answer this question with Hanpak.

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1/ OPP plastic bags: Oriented polypropylene

Features: most transparent, hard, tensile strength is same at every point, can not be stretched (two-way stretch), easy to tear on both sides of the seal.

2/ PP plastic bags: Polypropylene

Features: transparence and hardness are lower than OPP’s, can be stretched (two-way stretch), tough and flexible and have good resistance.

3/ PE plastic bags: Polyethylene

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Features: transparence is lower and softer than PP’s.

HDPE: high density polyethylene – feel crisp, tensile strength is higher, slightly harder, more heat resistant and more opaque than LDPE.

LDPE: low density polyethylene – feel soft, tensile strength is lower, and resilience is higher than HDPE.

(Source: Hanpak)

PE = Polyethylene. is a plastic material belonging to a group of polymers called polyolefins. It is usually first categorized by its density as indicated in the abbreviations e.g. HDPE (high density PE), MDPE (medium density PE), LDPE (low density PE) , LLDPE (linear low density PE).

OPP = Oriented polypropylene. This films have a variety of uses in both packaging and non-food packaging applications. These films are complex, usually multi-layered structures, which are developed to meet the exacting requirements of end-users, such as Coca-Cola®, Pepsi-Cola®, Frito-Lay®, Hershey® and Nabisco®.

CPP = cast polypropylene. Has been known in the packaging field to be the more "elegant" brother of polyethylene film, with higher gloss, greater transparency and better heat resistance. In the stationery industry, CPP film has developed the reputation for being the cost effective alternative to PVC film. What is not widely known about CPP film is its versatility. This film category is available in a variety of types and for multiple applications. CPP film is available with a polished or embossed surface, gloss or matte finish, stiff or flexible, clear or colored (semi-transparent or opaque), or in a combination thereof.    

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