Packaging material and packaged product

Details Packaging material and packaged product Packaging material and packaged product

2006-05-16

2006-05-16

Watkins, III, William P. (Department: 1772)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

C428S131000, C428S138000, C428S137000, C383S211000, C383S045000, C383S094000, C383S051000, C426S113000, C426S118000, C426S107000, C220S203160, C220S203110, C220S203080, C220S203010, C220S202000, C220S203170

Reexamination Certificate

active

07045190

ABSTRACT:
A packaging material is provided that can provide a packaging bag or container cover in which the contents is shielded from the atmosphere and tightly sealed, a small hole is formed in the appropriate locations, without special processing of the heat seal portion, and the internal pressure is maintained with high stability at a level above the normal pressure. The packaging material is suitable, for example, for heating in a microwave oven. The packaging material uses a film in which a heat sealing agent (4) with a low melting point is applied to a prescribed zone of an oriented film (2) made of a synthetic resin, a cutting line (5) is cut in the oriented film (2) made of a synthetic resin in the form of a solid or broken line passing through the zone coated with the heat sealing agent (4), and a cast film (3) made of a synthetic resin and having heat sealing properties is affixed to the oriented film (2) made of a synthetic resin. Such film is used for a packaging bag (1) or a container cover.

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