PET containers handle high temperatures

by Jeff Gelski
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WEST CHICAGO, ILL. — A new generation of polyethylene terephthalate (PET) containers offers sustained hot-fill performance at 205 degrees Fahrenheit, which means they may work for viscous food items that tend to fill at higher temperatures, according to Liquid Container. Apple sauces, pasta sauces, jams, jellies and tomato-based products are examples of viscous food items that may be used in the hot-fill, wide-mouth PET containers under the ThermaSet brand name.

A proprietary process developed by Liquid Container, West Chicago, increases the PET’s glass transition point, which results in sustained thermal stability at 205 degrees F and shrinkage of less than 1%.

“Many of the hot-fill PET containers in use today become thermally challenged when temperatures hit 205 degrees,” said Mark Schneider, senior director of PET technology group, Liquid Container. “What makes this a first is that our ThermaSet technology offers sustained performance at that temperature.”

The containers initially will come in five different stock designs: 18-oz round, 24-oz round, 32-oz round, 45-oz grip jar and 48-oz grip jar.

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