Packaging material and process for producing the same

Details Packaging material and process for producing the same Packaging material and process for producing the same

1997-07-15

1998-12-15

Nold, Charles

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 90, 15624412, 15624417, 15624423, 1562726, 1563096, 1563809, 156500, 156501, 156551, B32B 2710

Patent

active

058491287

ABSTRACT:
A packaging material (41) and a process and apparatus for producing the same are disclosed herein, wherein an satisfactorily enhanced gas barrier property is intended to be provided using a grease-proof paper sheet (23). A first layer (16) is formed on an outer surface which will be directed outwardly, when a package or container will be formed from the packaging material, and a second layer (37) is formed on an inner surface which will be directed outwardly, when the package or container will be formed from the packaging material. A substrate and a grease-proof paper layer (23) are provided between the first layer (16) and the second layer (37). At least one of the first and-second layers (16) and (37) is formed from a polymer selected from the group consisting of polyolefins. The grease-proof paper layer (23) has a TAPPI value in a range of 100 to 400 seconds. A polymer is coated on at least one of surfaces of the grease-proof paper layer (23). Thus, it is possible to provide a satisfactorily enhanced gas barrier property. The surface of the grease-proof paper layer (23) can be also activated by a surface-activating treatment.

REFERENCES:
patent: 4115181 (1978-09-01), Fuji et al.
patent: 4300969 (1981-11-01), Frydendal
patent: 4950510 (1990-08-01), Massouda
patent: 5057359 (1991-10-01), Merdem et al.
Database WPI, Section Ch, Week 8827.

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