Layered film compositions, packages prepared therefrom, and...

B - Operations – Transporting – 32 – B

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Details

B32B 27/32 (2006.01) B65D 30/26 (2006.01) B65D 33/01 (2006.01) B65D 65/40 (2006.01) B26F 1/24 (2006.01) B65B 51/10 (2006.01) B65D 77/22 (2006.01)

Patent

CA 2614337

The invention relates to a perforated film composition, comprising at least three layers, and wherein at least one layer is a inner layer with a softening and/or melting temperature, lower than the respective softening and/or melting temperatures of at least two outer layers, located at opposite surfaces of the inner layer, and where upon exposure to elevated temperature, the inner layer softens or melts to such an extent, that upon exposure to a compression force, a sufficient number of perforations seal in the inner layer, to impart an increased moisture barrier to the overall film composition. The invention also relates to a method of forming such a perforated film composition, packages prepared from the same, and a method of filling packages prepared from the perforated film composition. Image

L'invention concerne une composition de film perforé comprenant au moins trois couches, au moins une couche étant une couche intérieure dont la température de ramollissement et/ou de fusion est inférieure à la température de ramollissement et/ou de fusion respective d'au moins deux couches extérieures se situant de part et d'autre de la couche intérieure; lorsqu'elle est exposée à une température élevée, la couche intérieure se ramollit ou fond de sorte que, si elle est soumise à une force de compression, un nombre suffisant de perforations sont obturées dans la couche intérieure pour conférer à l'ensemble de la composition de film des propriétés barrière contre l'humidité accrues. L'invention concerne aussi un procédé d'élaboration d'une telle composition de film perforé, des conditionnements préparés à partir de celle-ci et un procédé de remplissage de conditionnements préparés à partir de cette composition.

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