Re-closable paper-based package

Patent metadata

Field	Value
Publication number	US-11851244-B2
Application number	US-202217719507-A
Country	US
Kind code	B2
Filing date	Apr 13, 2022
Priority date	Apr 13, 2021
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

A bag including: a first side panel having a pair of first side panel transverse edges and a first side panel interior facing surface; a closure opposite the bottom, wherein the closure releasably connects the first side panel to a second side panel. The closure includes: a first flexible angle. The first flexible angle includes a first interior part joined to the first side panel inside of the interior volume and a first exterior part extending from the first interior part and outside of the interior volume. The closure includes a repositionable pressure sensitive adhesive that releasably engages the first exterior part to the second side panel interior facing surface. A free flange extends from the first exterior part. The free flange is devoid of the repositionable pressure sensitive adhesive. The first side panel and the second side panel are more than about 80% by weight paper.

First claim

What is claimed is:

1. A bag comprising:
a first side panel having a pair of first side panel transverse edges and a first side panel interior facing surface;
a second side panel opposite said first side panel and having a second side panel interior facing surface facing said first side panel interior facing surface, wherein said second side panel is connected with said first side panel across a bottom of said bag and has a pair of second side panel transverse edges, wherein each said first side panel transverse edge is joined to an opposing second side panel transverse edge; and
a closure opposite said bottom and extending along a longitudinal axis, wherein said closure releasably connects said first side panel and said second side panel, wherein said closure, part of said first side panel interior facing surface, part of said second side panel interior facing surface, and said bottom define an interior volume;
wherein said closure comprises:
a first flexible angle extending along said longitudinal axis, wherein said first flexible angle comprises a first interior part joined to said first side panel inside of said interior volume and a first exterior part extending from said first interior part and outside of said interior volume;
a repositionable pressure sensitive adhesive that releasably engages directly or indirectly said first exterior part to said second side panel interior facing surface; and
a free flange extending from said first exterior part and along at least a portion of said longitudinal axis, wherein said free flange is devoid of said repositionable pressure sensitive adhesive;
wherein said first side panel and said second side panel are more than 80% by weight paper; and
wherein said repositionable pressure sensitive adhesive has a load at failure according to ASTM D3165-07(2014) from 0.05 to 0.5 MPa and an average T-peel strength according to ASTM D903-98(2017) from 0.01 to 0.6 N/mm.

2. The bag according to claim 1 , wherein said closure has a closure length along said longitudinal axis wherein said free flange has a free flange length along said longitudinal axis and said free flange length is less than 20% of said closure length.

3. The bag according to claim 1 , wherein at least a portion of said free flange contrasts in color from said first exterior part.

4. The bag according to claim 1 , wherein said second side panel is continuous with said first side panel across said bottom of said bag.

5. The bag according to claim 1 , wherein said bag is more than 80% by weight paper.

6. The bag according to claim 1 , wherein said first side panel interior facing surface and said second side panel interior facing surface are coated with a polymeric coating.

7. The bag according to claim 1 , wherein said repositionable pressure sensitive adhesive includes at least one material selected from acrylic and methacrylic ester homo or copolymers, butyl rubber based systems, silicones, nitriles, styrene block copolymers, ethylene vinyl acetate, urethanes, vinyl esters and amides, olefin copolymer materials, natural or synthetic rubber, and the mixtures thereof.

8. The bag according to claim 1 , wherein said first side panel and said second side panel each have a top edge outside said interior volume, wherein said free flange is recessed relative to said top edges.

9. A method of opening the bag according to claim 1 , comprising the steps of:
grasping said second side panel at a top edge of said second side panel with one hand, wherein said top edge is opposite said bottom and outside said interior volume;
grasping said free flange with another hand; and
peeling said free flange from said second side panel along said repositionable pressure sensitive adhesive to open said bag.

10. The bag according to claim 1 , wherein said bag further comprises a second flexible angle extending along said longitudinal axis, wherein said second flexible angle comprises a second exterior part joined to said second side panel interior facing surface outside of said interior volume and a second interior part extending from said second exterior part and inside said interior volume, wherein said repositionable pressure sensitive adhesive releasably engages said first exterior part to said second interior part to indirectly releasably engage said first exterior part to said second side panel interior facing surface through said second interior part, and wherein said second interior part has a second interior part distal end oriented towards said interior volume.

11. The bag according to claim 10 , wherein said repositionable pressure sensitive adhesive is on at least one surface selected from said first exterior part and oriented towards said second interior part, said second interior part and oriented towards said first exterior part, and combinations thereof.

12. The bag according to claim 10 , wherein said closure has a closure length along said longitudinal axis wherein said free flange has a free flange length along said longitudinal axis and said free flange length is less than 20% of said closure length.

13. The bag according to claim 10 , wherein said first flexible angle and said second flexible angle are more than 80% by weight paper.

14. The bag according to claim 10 :
wherein said first flexible angle and said second flexible angle each have an outward facing surface wherein said outward facing surfaces are oriented away from one another; wherein said first side panel interior facing surface, said second side panel interior facing surface, and at least a portion of each said outward facing surface are coated or partially coated with a polymeric coating; and
wherein said outward facing surface of said first flexible angle is joined to said first side panel interior facing surface by a heat seal of said polymeric coating and said outward facing surface of said second flexible angle is joined to said second side panel interior facing surface by a heat seal of said polymeric coating.

15. The bag according to claim 14 , wherein said closure has a closure length along said longitudinal axis wherein said free flange has a free flange length along said longitudinal axis and said free flange length is less than 20% of said closure length.

16. The bag according to claim 14 , wherein said first side panel and said second side panel each have a top edge outside said interior volume, wherein said free flange is recessed relative to said top edges.

17. A method of opening the bag according to claim 14 comprising the steps of:
grasping said second side panel at a top edge of said second side panel with one hand, wherein said top edge is opposite said bottom and outside said interior volume;
grasping said free flange with another hand; and
peeling said free flange and said second side panel away from one another to peel said first exterior part from said second interior part along said repositionable pressure sensitive adhesive to open said bag.

18. A method of opening the bag according to claim 14 comprising the steps of:
grasping said second side panel at a top edge of said second side panel with one hand, wherein said top edge is opposite said bottom and outside said interior volume;
grasping said free flange with another hand;
peeling said free flange and said second side panel away from one another to peel said first exterior part from said second interior part along said repositionable pressure sensitive adhesive to open said bag; and
reengaging said first exterior part and said second interior part with one another along said repositionable pressure sensi

Assignees

• Procter & Gamble

Inventors

• Beelen Laurens

Classifications

• B65D33/20 Primary

  using pressure-sensitive adhesive · CPC title

• B65D31/02

  with laminated walls · CPC title

• B65D33/007 Primary

  for facilitating the separation of the two walls, e.g. walls of inequal height, tabs; for maintaining the mouth of the sack or bag open · CPC title

• B65D33/1691

  using adhesive applied to attached closure elements · CPC title