B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/18 (2006.01) B32B 27/32 (2006.01)
Patent
CA 2426881
A coextruded, heat-sealable film structure includes a core layer of a thermoplastic polymer having a first side and a second side. A functional layer which is printable, sealable, or can be laminated or is treatable for printing, sealing, or laminating is on the first side of the core layer. A heat-sealable layer is on the second side of the core layer. The heat-sealable layer is composed of a thermoplastic polymer and an amount of a slip system, based upon the entire weight of the heat-sealable layer, sufficient to reduce the coefficient of friction and improve the slip performance of the film structure. The slip system is composed of a silicone gum and at least one antiblocking agent. The film structure exhibits the desirable combination of improved converting performance and excellent machinability performance.
L'invention concerne une structure de film coextrudé thermoscellable, qui comprend une couche noyau d'un polymère thermoplastique, dotée d'un premier côté et d'un second côté. Une couche fonctionnelle imprimable, scellable, plastifiable ou traitable en vue d'une impression, d'un scellage ou d'une plastification se situe sur le premier côté de la couche noyau. La couche thermoscellable est composée d'un polymère thermoplastique et d'une quantité d'un système de glissement basé sur le poids total de la couche thermoscellable, suffisante pour réduire le coefficient de frottement et améliorer la performance de glissement de la structure de film. Le système de glissement est composé d'une gomme de silicone et d'un agent antiadhérent au moins. La structure de film présente la combinaison souhaitée d'une meilleure performance de transformation et d'une excellente performance d'usinabilité.
Migliorini Robert A.
Sheppard Karen A.
Borden Ladner Gervais Llp
Exxonmobil Oil Corporation
LandOfFree
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