Thermoplastic films with enhanced resistance to puncture and tear

Patent metadata

Field	Value
Publication number	US-9290303-B2
Application number	US-201314061820-A
Country	US
Kind code	B2
Filing date	Oct 24, 2013
Priority date	Oct 24, 2013
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

The present invention relates to a thermoplastic film having improved tear and puncture resistance. The thermoplastic has a plurality of embossed regions that are comprised of a plurality of parallel, linear embosses. The plurality of embossed regions is arranged so that a straight line cannot traverse the thermoplastic film without intersecting at least one of the plurality of embossed regions.

First claim

I claim:

1. A thermoplastic film comprising:
a polymeric film,
a plurality of embossed regions embossed into the homogenous polymeric film, wherein the plurality of embossed regions are separated by a continuous, unembossed arrangement,
wherein each of the plurality of embossed regions further comprises a set of parallel, linear embosses and each embossed region has a shape defined by the boundary with the continuous, unembossed arrangement, and
the continuous, unembossed arrangement is configured to provide that a continuous, straight line cannot be drawn across the arrangement without intersecting at least one of the plurality of embossed regions.

2. The thermoplastic film of claim 1 , further comprising:
for each and every set of parallel, linear embosses, said linear embosses are all parallel to the other linear embosses.

3. The thermoplastic film of claim 1 , further comprising:
a majority of the plurality of embossed regions are irregularly shaped.

4. The thermoplastic film of claim 1 , further comprising:
a majority of the plurality of embossed regions are hexagon-shaped.

5. The thermoplastic film of claim 1 , further comprising:
a majority of the plurality of embossed regions are rectangular.

6. The thermoplastic film of claim 1 , further comprising:
the plurality of embossed regions and the continuous, unembossed arrangement extends across substantially the entire area of the homogenous polymeric film.

7. The thermoplastic film of claim 1 , further comprising:
a majority of the plurality of embossed regions are circular.

8. The thermoplastic film of claim 7 , further comprising:
for each of the plurality of embossed regions, said embossed region is substantially positioned along one of a first set of parallel sinusoidal lines extending in a first direction.

9. The thermoplastic film of claim 8 , further comprising:
for each of the plurality of embossed regions, said embossed region is substantially positioned along one of a second set of parallel sinusoidal lines extending in a second direction perpendicular to the first direction of the first set of parallel sinsusoidal lines.

10. A thermoplastic bag comprising:
a first panel and a second panel, the first panel and second panel joined along a first side edge, a second side edge, and a bottom edge, a top edge of the first panel and second panel defining an upper opening of the bag,
a plurality of embossed regions embossed into the first panel and the second panel, wherein the plurality of embossed regions are separated by a continuous, unembossed arrangement,
wherein each of the plurality of embossed regions further comprises a plurality of parallel, linear embosses and each embossed region has a shape defined by the boundary with the continuous, unembossed arrangement, and
the continuous, unembossed arrangement is configured to provide that a continuous, straight line cannot be drawn across the arrangement without intersecting at least one of the plurality of embossed regions.

11. The thermoplastic bag of claim 10 , further comprising:
for each and every set of parallel, linear embosses, said linear embosses are all parallel to the other linear embosses.

12. The thermoplastic bag of claim 10 , further comprising:
a majority of the plurality of embossed regions are irregularly shaped.

13. The thermoplastic bag of claim 10 , further comprising:
a majority of the plurality of embossed regions are hexagon-shaped.

14. The thermoplastic bag of claim 10 , further comprising:
a majority of the plurality of embossed regions are rectangular.

15. The thermoplastic bag of claim 10 , further comprising:
the plurality of embossed regions and the continuous, unembossed arrangement extends across substantially the entire area of the first panel and the second panel.

16. The thermoplastic bag of claim 10 , further comprising:
a majority of the plurality of embossed regions are circular.

17. The thermoplastic bag of claim 16 , further comprising:
for each of the plurality of embossed regions, said embossed region is substantially positioned along one of a first set of parallel sinusoidal lines extending in a first direction.

18. The thermoplastic bag of claim 17 , further comprising:
for each of the plurality of embossed regions, said embossed region is substantially positioned along one of a second set of parallel sinusoidal lines extending in a second direction perpendicular to the first direction of the first set of parallel sinsusoidal lines.

Assignees

• Poly America Lp

Inventors

• Cobler Brad A

Classifications

• B29D7/01 Primary

  Films or sheets · CPC title

• Y10T428/2457

  Parallel ribs and/or grooves · CPC title

• Y10T428/1345

  Single layer [continuous layer] · CPC title

• B65D33/00 Primary

  Details of, or accessories for, sacks or bags · CPC title

• B29C59/022

  characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor · CPC title