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Polyethylene and Polypropylene

Picking the correct material for your product can make the difference between success and failure. Plastic comes in many different types, and the differences in character traits can be drastic. You should never rush into production without first ensuring you picked the correct type of plastic. Some common plastics are:

Polyethylene Terephthalate (PET)
Polyethylene (PE)
Polycarbonate (PC)
Polypropylene (PP)
Polyvinyl Chloride (PVC)

Out of the plastics mentioned above, polyethylene and polypropylene are amongst the two most frequently used plastics.

They are both made up of smaller parts that are put together to form a whole product (hence the prefix Poly). After this similarity, there is not much that connects the two plastics. Simply put, the major difference between the two plastics is that one is made by polymerizing ethylene monomer units, whereas the other process requires polymerizing propylene monomers.

Polyethylene is flexible and less rigid. Polypropylene is the exact opposite. Polyethylene has a low static charge, a lower melting point, and is also a translucent material. Polypropylene is rigid, has color, has a high static charge, and has a high melting point.

Rotary die cutting can be performed on both materials, and so it is important first to choose the material that will be best for the final product. The only way to get quality die cutting is through picking proper materials.