Faster, better sealing for resealable bags


A new multilayer coextrusion film utilizes DuPont's Surlyn material as a sealant layer for faster, more reliable sealing. DuPont says the film, which is used for resealable tubular bags, is the culmination of a two-year joint-development project with Südpack (Ochsenhausen, Germany), with the low-temperature sealing and good hot-tack of Surlyn allowing an increase in productivity on horizontal and vertical form, fill, and seal (HFFS and VFFS) equipment.

Called Multipeel Flow Wrap, Südpack's film structure widens the tolerance range over which reliably tight seals can be created, allowing packaging lines to run at higher speeds.

DuPont says films using Surlyn benefit from

•Less heat energy being required thanks to Surlyn's low minimum-seal temperature
•Reliable sealing over a wide temperature range
•High hot tack strength to widen the tolerance range in which reliably tight seals can be created
•Securely sealed packaging for end consumers...
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