Electra Form Industries, a unit of Wentworth Technologies Co. Ltd., has developed the Exstream hot-runner manifold for PET preform molding.
Exstream addresses concerns by preform molders and bottlers about acetaldehyde (AA), a byproduct of heat history in PET that can alter the taste of a container´s contents. The manifold was designed to reduce the shear-heat history.
Electra Form conducted manufacturing trials, using the head-space method, on a 48-cavity preform mold. Results showed an average AA rate of 1.0 microgram per liter over the 48 cavities. The maximum value was 2.2, a minimum of 0.58 and a standard deviation of 0.43 micrograms per liter — all well below the industry standard.
Electra Form of Vandalia, Ohio, offers Exstream on all of its molds. The company also sells a retrofit package for existing molds.
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