Enhanced Flexible Material And Articles Formed Therefrom

• US 20190322431A1
• Filed: 07/01/2019
• Published: 10/24/2019
• Est. Priority Date: 07/12/2010
• Status: Active Grant

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Broering, Shaun Thomas, MCaffry, Karen Denise
• Granted Patent: US 11,834,243 B2
• Time in Patent Office: Days
• CPC Class Codes: B31B 2150/00 Flexible containers made from sheets or blanks, e.g. from flattened tubes
• CPC Class Codes: B31B 2160/10 rectangular and flat, i.e. without structural provision for thickness of contents
• CPC Class Codes: B31B 70/00 Making flexible containers, e.g. envelopes or bags
• CPC Class Codes: B31B 70/88 Printing; Embossing
• CPC Class Codes: B32B 2250/242 All polymers belonging to those covered by group B32B27/32
• CPC Class Codes: B32B 2270/00 Resin or rubber layer containing a blend of at least two different polymers
• CPC Class Codes: B32B 2307/4026 within the layer by addition of a colorant, e.g. pigments, dyes
• CPC Class Codes: B32B 2307/41 Opaque
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 2307/414 Translucent
• CPC Class Codes: B32B 2307/51 Elastic
• CPC Class Codes: B32B 2307/546 Flexural strength; Flexion stiffness
• CPC Class Codes: B32B 2307/718 Weight, e.g. weight per square meter
• CPC Class Codes: B32B 2307/72 Density
• CPC Class Codes: B32B 2307/7244 Oxygen barrier
• CPC Class Codes: B32B 2307/732 Dimensional properties
• CPC Class Codes: B32B 2307/738 Thermoformability
• CPC Class Codes: B32B 2307/746 Slipping, anti-blocking, low friction
• CPC Class Codes: B32B 2439/46 Bags
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/20 : using fillers, pigments, thixotroping agents
• CPC Class Codes: B32B 27/306 : comprising vinyl acetate or vinyl alcohol (co)polymers
• CPC Class Codes: B32B 27/32 : comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/34 : comprising polyamides
• CPC Class Codes: B32B 27/36 : comprising polyesters
• CPC Class Codes: B32B 3/08 : characterised by added members at particular parts layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18
• CPC Class Codes: B32B 3/28 : characterised by a layer comprising a deformed thin sheet , i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled B32B29/08 takes precedence
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B65D 33/00 : Details of, or accessories for, sacks or bags
• CPC Class Codes: B65D 75/006 : in stretch films
• CPC Class Codes: B65F 1/0006 : Flexible refuse receptables, e.g. bags, sacks
• CPC Class Codes: B65F 1/002 : with means for opening or closing of the receptacle
• CPC Class Codes: B65F 2250/114 : Plastics
• CPC Class Codes: Y10T 428/13 : Hollow or container type article [e.g., tube, vase, etc.]
• CPC Class Codes: Y10T 428/24479 : including variation in thickness
• CPC Class Codes: Y10T 428/24694 : Parallel corrugations

Abstract

A flexible film, and articles comprising the film, comprises interleaved pluralities of each of first bands and second bands disposed adjacent to the first bands. Both the first and second bands have a length and a width; the first bands comprise a first film basis weight and first and second regions. The first regions and second regions being comprised of the same material composition. The first regions undergo a substantially molecular-level deformation and the second regions initially undergo a substantially geometric deformation when the sheet material is subjected to an applied elongation along at least one axis. The second bands comprise a second film basis weight and a plurality of corrugations disposed along the length of the band. In this aspect the material may be described as having alternating bands of structural-elastic-like film and ring-rolled film.

Claims

1. A flexible film comprising a plurality of each of a first band and a second band, the pluralities interleaved adjacent to each other, both the first and second bands having a length and a width, wherein the first band comprises a first film basis weight and first and second regions, the first regions first region undergoes a substantially molecular-level deformation and the second region initially undergoes a substantially geometric deformation when the sheet material is subjected to an applied elongation along the width of the band, the second band comprises a second film basis weight and a plurality of corrugations disposed along the length of the band.

2. The flexible film of claim 1 comprising a plurality of each of the first and second bands, the plurality of first bands interleaved with the plurality of second bands, wherein the combined pluralities provide a pattern of alternating first and second bands.

3. The flexible film of claim 1 comprising a plurality of each of the first and second bands, the plurality of first bands interleaved with the plurality of second bands, wherein the mechanical properties of the first band are essentially equal to the mechanical properties of the second band.

4. The flexible film of claim 1 wherein the first regions of the first bands are arrayed asymmetrically about the second bands.

5. The flexible film of claim 2 wherein the first regions of the first bands are arrayed symmetrically about the second bands.

6. The flexible film of claim 1 where the width of the second region is less than 0.75 inches.

7. The flexible film of claim 1 wherein the basis weight of the first bands is about 23 gsm and the basis weight of the second bands is about 16 gsm.

8. A flexible bag comprising at least one sheet of flexible sheet material assembled to form a semi-enclosed container having an opening defined by a periphery, the sheet of flexible material comprising a first band and a second band disposed adjacent to the first band, both the first and second bands having a length and a width, wherein the first band comprises a first film basis weight and first and second regions, the first regions undergoes a substantially molecular-level deformation and the second region initially undergoes a substantially geometric deformation when the sheet material is subjected to an applied elongation across the width of the band, the second band comprises a second film basis weight and a plurality of substantially continuous_corrugations disposed along the length of the band.

9. The flexible bag of claim 8 comprising a plurality of each of the first and second bands, the plurality of first bands interleaved with the plurality of second bands, wherein the combined pluralities provide a pattern of alternating first and second bands.

10. The flexible bag of claim 9 wherein the first regions of the first bands are arrayed asymmetrically about the second bands.

11. The flexible bag of claim 9 wherein the first regions of the first bands are arrayed symmetrically about the second bands.

12. The flexible bag of claim 8 wherein the basis weight of the first bands is about 23 gsm and the basis weight of the second bands is about 16 gsm.

13. The flexible bag of claim 8 further comprising third bands having substantially the same basis weight as the first bands, the third bands being substantially planar.

14. The flexible bag of claim 8 further comprising a bag closure.

15. The flexible bag of claim 8 further comprising a second layer of flexible film material disposed inside the bag along the edge distal to the opening of the bag.

16. A method for forming a flexible film comprising a plurality of each of the first and second bands, the plurality of first bands interleaved with the plurality of second bands, wherein the mechanical properties of the first band are essentially equal to the mechanical properties of the second band. The method comprising formation of each band to different degree of stretch as suitable to obtain equal mechanical properties at lower basis weight than a film made solely of the first band.