C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 153/00 (2006.01) B32B 7/12 (2006.01) B32B 27/06 (2006.01) B65D 77/20 (2006.01) C09J 153/02 (2006.01)
Patent
CA 2437857
The invention relates to hot-coextrudable thermofusible self-adhesives that are particularly suitable for producing multi-layer films intended to be used for easy-to-open and easy-to-reclose repositionable packaging containers. Said adhesives comprise a mixture of a styrene block copolymer and a compatible tacky resin having a high melt viscosity and a traction resistance force at 1 m.s-1. included in the area located below the polynomial curve defined by y = - 2.82.10-16.x6 + 5.92.10-13.x5 4.97.10-10.x4 +2.15.10-7.x3 4.99.10-5.x2 + 6.26.10-3.x + 4.71.10-2 wherein the y ordinate represents the constraint which is expressed in MPa and x, abscissa, represents the deformation which is expressed in %.
L'invention concerne des auto-adhésifs thermofusibles coextrudables à chaud particulièrement adaptés à la confection de films multicouches destinés aux emballages à ouverture et refermetures faciles dits "repositionnables". Ces adhésifs comprennent un mélange d'un copolymère bloc styrénique, et d'une résine tackifiante compatible présentant une viscosité à chaud élevée et une force de résistance à la traction à 1 m.s?1¿. comprise dans le domaine situé au dessous de la courbe polynomiale définie par y = - 2,82.10?-16¿.x?6¿ + 5,92.10?-13¿.x?5¿ - 4,97.10?-10¿.x?4¿ +2,15.10?-7¿.x?3¿ - 4,99.10?-5¿.x?2¿ + 6,26.10?-3¿.x + 4,71.10?-2¿ où y, ordonnée, représente la contrainte exprimée en MPa et x, abscisse, représente la déformation exprimée en %.
Bardiot Anne
Gerard Pierre
Notteau Christophe
Sajot Nicolas
Bostik Findley S.a.
Robic
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