Article having a seal and process for forming the same

Patent metadata

Field	Value
Publication number	US-9271879-B2
Application number	US-72190510-A
Country	US
Kind code	B2
Filing date	Mar 11, 2010
Priority date	Mar 13, 2009
Publication date	Mar 1, 2016
Grant date	Mar 1, 2016

Abstract

An article having an embossed seal includes at least two webs, and an embossed seal joining a portion of the at least two webs, the seal including co-registered concentric discrete extended elements formed in the at least two webs, the discrete extended elements having open proximal ends.

First claim

What is claimed is:

1. An article, comprising:
at least two webs comprising a first polymeric film and second polymeric film, and a temporary and separable embossed seal joining a portion of the at least two webs, the embossed seal comprising co-formed concentric discrete extended elements surrounded by lands formed in the first polymeric film and the second polymeric film, the discrete extended elements having open proximal ends and portions of the discrete extended elements having a thickness less than that of the lands, wherein an area density of the discrete extended elements of the embossed seal is about 240 to about 10,000 discrete extended elements per square centimeter, wherein the embossed seal is free of adhesives, wherein the concentric discrete extended elements have not been fused together by melting, and wherein at least a portion of the embossed comprises a gap between the first polymeric film and the second polymeric film such that the distal ends of some of the discrete extended elements from one of the first polymeric film and the second polymeric film extend only partially into corresponding discrete extended elements from the other of the first polymeric film and the second polymeric film.

2. The article of claim 1 , wherein distal ends and/or sidewalls of the discrete extended elements are thinned by at least about 25% relative to the lands.

3. The article of claim 1 , wherein the discrete extended elements have a height at least substantially equal to a thickness of the web.

4. The article of claim 1 , wherein the discrete extended elements have closed distal ends.

5. The article of claim 1 , wherein each web has a thickness of about 5 microns to about 150 microns.

6. The article of claim 1 , wherein the discrete extended elements have an aspect ratio of at least about 0.2.

7. The article of claim 1 , wherein the discrete extended elements have a diameter of less than about 5,000 microns.

8. The article of claim 1 , further comprising an unsealed portion disposed adjacent to the embossed seal, the unsealed portion comprising portions of the at least two webs that are substantially free of concentric discrete extended elements.

9. The article of claim 8 , wherein the embossed seal is disposed along opposing sides of the at least two webs and the unsealed portion is disposed between the opposing sides having the embossed seal.

10. The article of claim 1 , wherein the first polymeric film is the same as the second polymeric film.

11. The article of claim 1 , wherein the first polymeric film is different from the second polymeric film.

Assignees

• Stone Keith Joseph
• Young Roger Dale
• Procter & Gamble

Inventors

• Stone Keith Joseph
• Young Roger Dale

Classifications

• B32B3/266

  characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12 · CPC title

• B29C59/04 Primary

  using rollers or endless belts · CPC title

• B29C2059/023

  Microembossing · CPC title

• B32B2037/0092

  in which absence of adhesives is explicitly presented as an advantage · CPC title

• B32B5/26

  another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)} · CPC title