Reclosable packaging using a low-tack adhesive fastener

Abstract

A flexible film package having an adhesive based reclosable fastener having a flexible film substrate forming a plurality of package walls sealed to form an interior cavity for receiving a product; the plurality of walls having at least two opposing flexible walls; a package mouth, initially sealed, to permit access to the interior cavity; a low tack pressure sensitive adhesive (LTPSA) layer disposed on each of an exterior surface of the parallel walls, the LTPSA sized and oriented in positions to oppose one another at a plurality of positions when the package is reclosed to allow progressively decreased size of the interior cavity as product is removed; and wherein a bond strength of the LTPSA to the flexible film substrate is greater than an adhesion between LTPSA areas. The mouth can be formed by a peelable seal or by a defined area of weakness.

Description

technical field [0001] The present invention relates generally to reclosable fasteners for flexible packaging, and in particular to low tack adhesive reclosable fastener systems for flexible packaging. Background technique [0002] Packaging, especially flexible packaging, can be used to hold food and other consumer products for shipping and storage. Flexible film packaging can have many advantages. It can be manufactured at a much lower cost than rigid containers, is lightweight (which results in reduced shipping costs), and can be easily packaged, resulting in reduced storage space compared to other types of rigid packaging. [0003] Despite these advantages, the freshness and tightness of the product within the package can be an issue when more product is provided than the consumer requires for a single use. Several types of closures and fasteners are available for reclosing previously opened flexible packages. Typically mechanical reclosable fasteners are used, such a...

AI Technical Summary

Problems solved by technology

When in use, particulate products contained in flexible packaging (such as cookie crumbs, coffee, shredded cheese, etc.) will stick to the high-tack PSA, reducing the effectiveness of its adhesive

Additionally, consumers may find sticking to the PSA undesirable

One attempt to solve this problem is to use a lower tack PSA, but as mentioned above this also often increases the likelihood of delamination from the packaging film

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