Multilayered, symmetrical, non-curling coextruded deep-drawn...

B - Operations – Transporting – 32 – B

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Details

B32B 27/08 (2006.01) B32B 27/32 (2006.01) B65D 65/40 (2006.01) C08L 23/02 (2006.01) C08L 23/08 (2006.01) C08L 51/06 (2006.01)

Patent

CA 2336668

Deep-drawn, multilayered, symmetrical, non-curling coextruded foil comprising at least the following layers: a) two outer layers (24 and 24') consisting of polyolefins or olefin copolymer or a mixture of said polymers and optionally conventional lubricating agents and/or antiblocking agents; b) two adjacent inner layers (10 and 10') consisting of polyolefins or olefin copolymers or a mixture of said polymers whose melting point is less than 100 ~C and optionally conventional additives; c) two inner layers (16 and 16') containing a polyamide or a mixture of different polyamides; d) an inner layer (14) bordering on the inner layers (12 and 16) and an inner layer (14') bordering on 12' and 16' containing an adhesion promotion polymer and e) an inner layer (20) bordering on the inner layers 24 and 16 and an inner layer (20') bordering on 24' and 16' containing an adhesion promoting polymer._________

Feuille à emboutir coextrudée, symétrique, à plusieurs couches et n'ayant pas tendance à s'enrouler, qui comporte au moins les couches suivantes: (a) deux couches externes (24, 24') constituées de polyoléfines ou de copolymères d'oléfines ou d'un mélange de ces polymères, et éventuellement d'agents de démoulage et/ou d'agents antiadhésifs, (b) deux couches internes adjacentes (10, 10') constituées de polyoléfines ou de copolymères d'oléfines ou d'un mélange de ces polymères, dont le point de fusion est inférieur à 100 ·C, et éventuellement d'additifs courants, (c) deux couches internes (16, 16') qui contiennent un polyamide ou un mélange de différents polyamides, (d) une couche interne (14) adjacente aux couches internes (12, 16) et une couche interne (14') adjacente à 12' et à 16', qui contiennent un polymère adhésif et (e) une couche interne (20) adjacente aux couches internes (24, 16) et une couche interne (20') adjacente à 24' et à 16', qui contiennent un polymère adhésif.

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