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US 9,381,697 B2Granted
Thermoplastic films with visually-distinct stretched regions and methods for making the same
AssigneeThe Glad Products Company
InventorsRobert T. Dorsey, Michael G. Borchardt
Life of this patent
Estimating the term…
Abstract
Thermoplastic films include intermittent stretched regions that are visually distinct from un-stretched regions. The stretched regions can be white, opaque, and non porous. The thermoplastic films with visually-distinct stretched regions can be formed into bags for use as trash can liners or food storage. Additionally, methods of stretching thermoplastic films to create non-porous, white, and opaque stretched regions include incrementally stretching a film of a thermoplastic material and a voiding agent.
Claims20
A thermoplastic bag, comprising:
- first and second sidewalls of a thermoplastic film that comprises linear low-density polyethylene and a voiding agent, the voiding agent being between 5 and 25 percent by weight of the first and second sidewalls, the first and second sidewalls being joined along three edges;
- a plurality of un-stretched regions formed in one or more of the first sidewall or the second sidewall, the un-stretched regions having a first average thickness;
- and
- a plurality of cold-stretched regions intermittently dispersed about the un-stretched regions, the cold-stretched regions having a second average thickness that is smaller than the first average thickness;
- wherein the cold-stretched regions are non-porous and more opaque than the un-stretched regions.
2 more elements
A thermoplastic bag, comprising:
- first and second sidewalls of a thermoplastic film that comprises a voiding agent, the voiding agent being between 5 and 20 percent by weight of the first and second sidewalls, the first and second sidewalls being joined along three edges;
- a plurality of thick regions formed in one or more of the first sidewall or the second sidewall, the thick regions having a first average thickness;
- and
- a plurality of cold-stretched regions alternating with the thick regions, the cold-stretched regions having a second average thickness that is smaller than the first average thickness;
- wherein the cold-stretched regions are non-porous and more opaque than the thick regions.
2 more elements
Dependencies are inferred from the claim text.