Sealant Technology Reduces Closure Leakage

A high-temperature wax technology from Tri-Seal, a Tekni-Plex company, is designed to bolster the stability of two-piece induction seals for closures. The technology is engineered to reduce seal-related product leakage from packaging closures, which is a particular cause of concern for lined closures and seals shipped or stored in high-temperature conditions, such as those commonly found in India, Israel, Southeast Asia, Australia, Puerto Rico, Latin and South America, and parts of North America.

When exposed to high temperatures even for brief periods, the wax component of a two-piece induction seal can be prematurely absorbed into the pulp layer prior to closure application, thereby potentially compromising seal integrity during the filling and capping process. Often, the result is a “potato-chip effect” whereby the heatseal portion of the circular seal’s outer edge curls and separates from the backing material. During capping, the heatseal portion can fold under and not fully seal on the bottle finish.

The proprietary wax technology is formulated to withstand higher-temperature environments to greatly reduce the potential for curling. The technology is compliant with US and European Union standards and requires no changes to most existing sealing application processes.