Polyethylene naphthalate

Polyethylene naphthalate

Polyethylene naphthalate (PEN) is a polyester with good barrier properties (even better than Polyethylene terephthalate). Because it provides a very good oxygen barrier, it is particularly well-suited for bottling beverages that are susceptible to oxidation, such as 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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