Multiple layer films with defined gas permeability and their...

B - Operations – Transporting – 32 – B

Patent

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B32B 27/34 (2006.01) B65D 65/40 (2006.01)

Patent

CA 2431692

The invention relates to multiple layer films, comprising at least one outer seal layer, a < 10 µm thick barrier layer consisting of a partially crystalline polyamide mixture of a xylylenediamine adipate and an aliphatic polyamide containing solid, nanoscale fillers as nucleation agents, which for the number-weighted average of all of the dispersed fillers have an extension of <= 10 nm for at least one dimension and an extension of at least 100 nm for another dimension 100 nm; and a plastic support layer, with the exception of a corresponding polyamide layer.

L'invention concerne des feuilles multicouches caractérisées en ce qu'elles comprennent au moins une couche scellée extérieure, une couche barrière d'épaisseur < 10 µm en un mélange de polyamide partiellement cristallisé composé d'un xylylènediamine-adipate et d'un polyamide aliphatique contenant des matières de charge solides, à l'échelle nanométrique, comme agents de nucléation, qui présentent, comme moyenne pondérale en nombre, de toutes les matières de charge dispersées, dans au moins une dimension, d'une longueur <= 10 nm et, dans une autre dimension, d'une longueur d'au moins 100 nm, et une couche support en matière plastique, à l'exception d'une couche de polyamide correspondante.

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