The zipper has male and female closures that channel particles outward and away from the zipper track. The zipper is a two-layer, coextruded LDPE with an EVA sealant and can be applied to a wide variety of packaging films at relatively low temperatures.
Presto Products: Contaminant-resistant zipper
The newest Fresh-Lock® zipper from Presto Products Co. (Appleton, WI) is the Style 140 contaminant-resistant zipper to help packaging of granular or powdery products.
Jan 31st, 1999
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