B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 33/01 (2006.01) B65D 30/08 (2006.01)
Patent
CA 2697780
The present invention pertains to a multilayer bag for receiving a powder material. A tubular wall is provided to have, once the bag is filled with the powder material and stacked, stacking sections which face upward and downward and side sections which face laterally. The tubular wall has an inner plastic liner with vents along at least one of the side sections to allow stacking pressure to expel air through the vents. There is also a first paper layer contiguous with the inner plastic liner, then a humidity barrier layer non-adjacent with the inner plastic liner; and at least one outer paper layer. The placement of the vents and the non-adjacent humidity barrier facilitate expulsion of air via the vents during and after stacking and avoid inadvertent sealing melt bonding between the humidity barrier and the inner liner.
Cartier Daniel
Desilets Sylvain
Engen Daniel C.
Gelinas Paul
Le Sage Jonathan
Emballage Rouville Inc.
Gelpac Rouville Solutions Emballage Inc./gelpac Rouville Packagi
Robic
LandOfFree
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