Easy open woven polypropylene bag

Abstract

The disclosure relates to a large package, typically with woven polypropylene walls, including an easy-open strip with a pre-activated peel seal. The easy-open strip achieves a high burst strength by configuring the pre-activated peel seal in shear mode in response to internal (product side) forces while achieving a low consumer opening force by configuring the peel seal in response to external (consumer side) forces.

Description

[0001]This application claims priority under 35 U.S.C. §119(e) of U.S. provisional application Ser. No. 61 / 152,571 filed Feb. 13, 2009, the disclosure of which is hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Disclosure[0003]The present disclosure pertains to a package or bag, particularly a large capacity easy-open package or bag with woven polypropylene walls wherein high burst capability and easy consumer opening capability are maintained.[0004]2. Description of the Prior Art[0005]Commercial packages or bags must have high burst characteristics to survive the distribution channel. This is particularly an issue for larger capacity packages or bags. A representative prior art large capacity reclosable package or bag having high burst capability and easy consumer opening is disclosed in commonly-assigned U.S. Published Patent Application No. 2008 / 0050052 entitled “High Burst Zipper Assembly For Large Reclosable Packages”, published on Feb. 28, 200...

AI Technical Summary

Benefits of technology

[0008]It is therefore an object of the present disclosure to provide an easy open, high burst package, particularly an easy-open package, which may include woven polypropylene walls.

[0009]This and other objects are obtained by providing an easy-open package or bag, preferably including woven polypropylene walls, with an easy-open strip which incorporates a pre-activated peel seal into the flange design creating a peel configuration for easy opening and a shear configuration for high burst strength during filling and drop testing.

Problems solved by technology

This is particularly an issue for larger capacity packages or bags.

Woven polypropylene bags are tough and robust as required by the demands of the distribution channel, but many typically are sewn and may require significant force to open, or require a tool, such as a knife or scissors to open the bag.

The use of a tool is typically not a problem in industrial applications, but can be problematic in retail or consumer applications.

Images