Procédé de fabrication d'un emballage refermable flexible

Method for making a flexible reclosable package

Abstract

L'invention concerne un procédé de formation d'un stratifié d'emballage flexible qui a une ouverture refermable. Le procédé comprend la formation d'un stratifié à deux parties qui a une structure externe jointe dans une relation en face à face avec une structure interne. Des lignes de pliure sont formées sur les deux structures pour permettre de former une ouverture à travers le stratifié en soulevant une partie ouvrante (par exemple un volet ou similaire) des deux structures hors du plan du stratifié. La ligne de pliure à travers la structure externe définit une ouverture plus large que la ligne de pliure à travers la structure interne, de telle sorte qu'une région en marge de la structure externe s'étend au-delà du bord de la partie ouvrante de la structure interne. Un adhésif autocollant est utilisé pour faire réadhérer la région en marge à une surface sous-jacente de la structure interne adjacente à l'ouverture à travers le stratifié.
A method of forming a flexible packaging laminate (30) that has a reclosable opening (20). The method includes forming a two-part laminate that has an outer structure (40) joined in face-to-face relation with an inner structure (60). Score lines (122,142) are formed in both structures (40,60) to enable an opening to be formed through the laminate by lifting an opening portion (e.g., a flap or the.like) of the two structures out of the plane of the laminate.. The score line (122) through the outer structure defines a larger opening than the score line (142) through the inner structure, such that a marginal region of the outer structure extends beyond the edge of the opening portion of the inner structure. A pressure-sensitive adhesive (92) is used to re-adhere the marginal region to an underlying surface of the inner structure adjacent the opening through the laminate.

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