Multilayer structure
AssigneeAisapack Holding S.A.
InventorJacques Thomasset
Life of this patent
Estimating the term…
Abstract
A synthetic resin multilayer structure (1) delimited by a top face (2), borders (3, 5) and a bottom face (4) of surface area substantially identical to that of the top face (2), said structure (1) comprising: a first layer (6) defining said faces (2, 4) and said borders (3, 5), a second layer (7), disposed between said faces (2, 4) and said borders (3, 5), of surface area at least equal to that of said faces (2, 4), characterized in that the second layer (7) forms at least one zigzag-shaped double fold (8, 9).
Claims11
A synthetic resin multilayer structure (1) delimited by a top face (2), borders (3, 5) and a bottom face (4) of surface area substantially identical to that of the top face (2), said structure (1) comprising:
- a first layer (6) defining said faces (2, 4) and said borders (3, 5),
- a second layer (7), disposed between said faces (2, 4) and said borders (3, 5), of surface area at least equal to that of said faces (2, 4),
- characterized in that the second layer (7) forms at least one zigzag-shaped double fold (8, 9).
A process for producing a synthetic resin multilayer structure by compression molding of a multilayer dose of molten resin, consisting in extruding continuously or discontinuously a multilayer dose of thermoplastic resins containing at least one layer of functional resin, in feeding said dose into a compression device, in compressing said dose in the device in order to obtain the object, the compression process being characterized in that a part of the functional layer is entrained toward the periphery and another part toward the center, the functional layer thus obtained in the object by said process forming at least one zigzag-shaped double fold.
Dependencies are inferred from the claim text.