Sealant offers clean-peel solution for Tyvek pouches

Published: 24-Jul-2007

Pharmaceutical and medical device manufacturers looking to achieve fibre-free peels, consistent seal strength and minimise costs for chevron pouches sealed to uncoated Tyvek may find the solution in Allegro T sealant from US-based Rollprint Packaging Products.


Polyester/polyethylene, the traditional default material for chevron pouches which utilise an uncoated Tyvek, provides challenges when trying to ensure consistently clean peels. In addition, polyester/polyethylene has a narrow operating window (approximately 10ºF) with inconsistent seal strength. Achieving seal strength targets is further complicated by the fact that the seal strength is directly proportional to the thickness of the Tyvek.

Allegro T, which uses proprietary, polyethylene-based sealant chemistry, not only offers a wider operating window (approximately 35ºF), but also offers a consistent seal strength regardless of where in the temperature range the seal is activated. Because the strength of the seal is controlled by the Allegro T chemistry, it is independent of Tyvek thickness.

Allegro T has good thermal and dimensional stability, and is also suitable for ethylene oxide or gamma sterilisation.

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