B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/20 (2006.01) B29C 47/06 (2006.01) B29C 47/58 (2006.01) B29C 47/70 (2006.01)
Patent
CA 2415277
A tubular, multilayer film comprises a central barrier layer and a pair of adhesive layers on opposite sides of the central barrier layer. The adhesive layers completely cover the central barrier layer. Opposing edges of the central barrier layer overlap longitudinally along the tubular, multilayer film. The total thickness of the central barrier layers in the overlapping portion is substantially the same as the thickness of the central barrier layer in the non-overlapping portion. The tubular, multilayer film also includes inner and outer surface layers. The inner surface layer extends completely around the interior of the tubular, multilayer film, and the outer surface layer extends completely around the exterior of the tubular, multilayer film.
L'invention concerne un film multicouche tubulaire qui comprend une couche barrière centrale et une paire de couches adhésives situées sur les côtés opposés de cette couche barrière centrale. Les couches adhésives recouvrent complètement la couche de barrière centrale. Les bords opposés de la couche de barrière centrale se chevauchent longitudinalement le long du film multicouche tubulaire. L'épaisseur totale de la couche barrière centrale au niveau de ses parties qui se chevauchent est pratiquement la même que son épaisseur où il n'y a pas de chevauchement. Le film multicouche tubulaire comprend également une couche superficielle intérieure et une couche superficielle extérieure. La couche superficielle intérieure s'étend complètement sur la partie intérieure du film multicouche tubulaire, et la couche superficielle extérieure s'étend complètement sur la partie extérieure du film multicouche tubulaire.
Dooley Joseph
Jenkins Steven R.
Naumovitz John A.
Dow Global Technologies Inc.
Smart & Biggar
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