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Polyethylene Terephthalate


This material is a little confusing because it has more than one chemical name and then there are many brand names as well.

POLYESTER is a category of polymers that have a specific structure. As a material, it usually refers to a the type of polyester called POLYETHYLENE TEREPHTHALATE (PET)

It is the most common thermoplastic polymer resin of the polyester family and is used to make

  • fibers for clothing (where it is called “polyester” or Dacron
  • recyclable containers for liquids and foods (where it is called PET or PETE)
  • film for food packaging and space blankets (where it is called MPET or Mylar)

Polyester and polyethylene terephthalates are one and the same.

Polyester is the third most-produced polymer in the world, after polyethylene (PS) and polypropylene (pp).