Pressure sensitive food grade wrap film and process for...

B - Operations – Transporting – 65 – D

Patent

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B65D 65/14 (2006.01) B32B 27/32 (2006.01) C09J 7/02 (2006.01)

Patent

CA 2417245

A flexible pressure-sensitive food grade wrap film, and a process for manufacturing the film. The film includes a substrate (2) overcoated with a pressure-sensitive adhesive (4), a release (6) overprinted on the adhesive (4) that prevents the adhesive (4) from clinging to the surface of an article or to itself without applying pressure, and, optionally, a release coating (12) on the opposite side of the substrate (2). Once pressure is applied to the film, the film flexibility allows the adhesive (4) to contact the surface of the article or itself and subsequently adhere to hold the film in place or to form a sealed pouch around an article. The pressure-activated contact and adhesion to an article or to itself are designed to form a tight, spill- resistant physical bond that seals liquid or solid contents in a container, or forms a sealed pouch around a solid article.

L'invention concerne une feuille auto-adhésive souple d'emballage, de qualité alimentaire, ainsi que son procédé de fabrication. La feuille comprend un substrat revêtu d'un agent auto-adhésif, un agent anti-adhérent surimprimé sur l'adhésif, empêchant l'adhésif de s'accrocher à la surface d'un article ou à lui-même sans application de pression et, éventuellement, un revêtement anti-adhérent sur la face opposée du substrat. Une fois la pression appliquée sur la feuille, la flexibilité de la feuille permet à l'adhésif de venir en contact avec la surface de l'article ou avec lui-même, et adhérer ensuite pour maintenir la feuille en place ou pour former un sac scellé autour d'un article. Le contact activé par pression et l'adhérence à un article ou à lui-même sont conçus de manière à former une liaison physique serrée résistant à l'écoulement, garantissant l'étanchéité des matières liquides ou solides contenues dans un récipient, ou formant un sac scellé autour d'un article solide.

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