Polyethylene naphthalate
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This article is about the polymer. For other uses of the acronym, see PEN.
Polyethylene naphthalate (PEN) is a polyester with good barrier properties (unlike Polyethylene terephthalate). It is well-suited for production of the amber-colored bottles meant for packing beverages like beer. It is also used in making sailcloth for racing boats.
PEN is also the medium for Advanced Photo System film.
PEN is also used for manufacturing high performance fibers that have very high modulus and better dimensional stability than Polyester or Nylon fibers.
It is prepared from ethylene glycol and one or more naphthalene dicarboxylic acids by condensation polymerization.
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