Amcor Flexibles Transpac N.v.

Amcor Flexibles Transpac

Erik Bögels

Tony Malfait

Kris Buysens

Roy Christopherson

Peter Ettridge

Gerard Fonteyne

Patrick Rosseau

Luc Veys

The present invention relates to a tamper-evident push-through packaging secured against fraudulent reuse comprising: &#x2014;a polymer base web () comprising at least one pocket; &#x2014;a multilayer lidding film () covering said pocket, said multilayer lidding film () comprising on its seal side a coextruded polymer film, said coextruded polymer film comprising a push-through polymer layer () sealed on the base web by a permanent seal and a peelable protective polymer layer (), the polymers of both layers () being incompatible and in direct contact with each other, without interlayer, the adhesion between said push-through polymer layer () and said peelable protective polymer layer () being lower than the seal strength between said polymer base web () and said push-through polymer layer (), wherein, in use, the push-trough layer leaves a seal seam (), after removing the part of the push-trough layer () covering the pocket and wherein said protective layer () cannot be resealed by a heat sealing process on said seal seam ().

Tamper-evident push-through packaging

The present invention is related to a heat sealable coextruded multilayer packaging film peelable on a variety of substrates including polyethylene, polypropylene, polyester, polyvinyl chloride, polyamide, polyacrylonitirle and paper, comprising at least one peelable layer from a pre-compounded precursor formulation containing: &#x2212;50 to 80% by weight of an ethylene homo and/or copolymer, &#x2212;15 to 25% by weight of a styrene homo or/and copolymer, &#x2212;5 to 20% by weight of a thermoplastic elastomeric styrene-butadiene-styrene block copolymer, characterised in that the peel force in said peelable seal film produced by said pre-compounded precursor is modified by the presence in said precursor in the final extrusion step of 5 to 25, and preferably 10 to 20% by weight of homogeneously branched LLDPE and/or polybutene-1.

Peelable seal film

Growing community of inventors

Lanaken, Belgium

Erik Bögels