High strength flexible film package

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/08 (2006.01) B32B 3/04 (2006.01) B32B 27/32 (2006.01) B65D 65/40 (2006.01) C08J 5/18 (2006.01)

Patent

CA 2265580

An article, such as a bag (10), pouch, casing, or sheet formed from joined film pieces, comprises a non-crosslaminated film. The article has a parallel plate burst strength of at least 300 inches of water, more preferably, from about 300 to 2000 inches of water. The film comprises one or more of a wide variety of polymers, with linear low density polyethylene being a preferred polymer. The film is heat sealed to itself or another film (preferably a similar or identical film). Preferably, the film has a total thickness of from about 3 to 20 mils. The burst strength is surprising in view of the fact that the film is not cross-laminated.

L'invention porte sur un article, tel qu'un sac (10), une poche, une enveloppe ou une feuille, obtenu à partir de parties jointes d'un film sans stratification croisée. Ledit article présente une résistance à l'éclatement des plaques parallèles correspondant à au moins 300 pouces de hauteur d'eau, et de préférence entre 300 et 2000 pouces de hauteur d'eau. Le film est fait d'un ou plusieurs des polymères d'une grande variété dont le préféré est un polyéthylène linéaire à basse densité. Le film, thermoscellé sur lui même ou sur un autre film (similaire ou identique de préférence), présente une épaisseur totale allant d'environ 3 à 20 mils. La résistance à l'éclatement est surprenante compte tenu de la non stratification croisée du film.

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