Stretch release article

• US 8,889,240 B2
• Filed: 12/28/2012
• Issued: 11/18/2014
• Est. Priority Date: 12/28/2012
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Wood, Leigh E.
• Primary Examiner(s): Nordmeyer, Patricia L
• Application Number:
  US13/730,125
• Publication Number:
  US 20140186566A1
• Time in Patent Office: 690 Days
• Field of Search: 428/40.1, 428/41.9, 428/42.1, 428/343, 428/354
• US Class Current: 428/40.1
• CPC Class Codes: A61F 13/15 Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body non-absorbent catamenial receptacles A61F5/44; Supporting or fastening means therefor; Tampon applicators
• CPC Class Codes: A61F 13/15699 Forming webs by bringing together several webs, e.g. by laminating or folding several webs, with or without additional treatment of the webs
• CPC Class Codes: A61F 13/472 specially adapted for female use A61F13/474, A61F13/475, A61F13/476 take precedence
• CPC Class Codes: A61F 13/5611 using fastening strips, e.g. adhesive, on the undergarment-facing side
• CPC Class Codes: A61F 13/66 Garments, holders or supports not integral with absorbent pads
• CPC Class Codes: A61F 2013/15121 for mild incontinence
• CPC Class Codes: A61F 2013/1591 via adhesive
• CPC Class Codes: B29C 65/4825 Pressure sensitive adhesives
• CPC Class Codes: B29C 65/76 Making non-permanent or releasable joints
• CPC Class Codes: B32B 2307/726 Permeability to liquids, absorption
• CPC Class Codes: B32B 2555/02 Diapers or napkins
• CPC Class Codes: B32B 37/1292 selectively, e.g. in stripes, in patterns B32B37/0076 takes precedence
• CPC Class Codes: B32B 43/006 Delaminating
• CPC Class Codes: C09J 2301/124 the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
• CPC Class Codes: C09J 2301/204 the adhesive coating being discontinuous
• CPC Class Codes: C09J 2301/302 the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
• CPC Class Codes: C09J 2301/308 the adhesive tape or sheet losing adhesive strength when being stretched, e.g. stretch adhesive
• CPC Class Codes: C09J 2409/00 Presence of diene rubber
• CPC Class Codes: C09J 2423/106 in the substrate
• CPC Class Codes: C09J 2425/00 Presence of styrenic polymer
• CPC Class Codes: C09J 2453/00 : Presence of block copolymer
• CPC Class Codes: C09J 7/20 : characterised by their carriers
• CPC Class Codes: C09J 7/22 : Plastics; Metallised plastics
• CPC Class Codes: C09J 7/38 : Pressure-sensitive adhesives [PSA]
• CPC Class Codes: Y10T 156/1142 : Changing dimension during delaminating [e.g., crushing, expanding, warping, etc.]
• CPC Class Codes: Y10T 428/14 : Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/1476 : Release layer
• CPC Class Codes: Y10T 428/1486 : Ornamental, decorative, pattern, or indicia
• CPC Class Codes: Y10T 428/24132 : including grain, strips, or filamentary elements in different layers or components parallel
• CPC Class Codes: Y10T 428/24752 : Laterally noncoextensive components
• CPC Class Codes: Y10T 428/24802 : Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/24851 : Intermediate layer is discontinuous or differential
• CPC Class Codes: Y10T 428/28 : Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2848 : Three or more layers

Abstract

Provided are adhesive articles and assemblies that include a flat and at least partially elastic backing along with a patterned adhesive coating on each side of the backing. When viewed from directions perpendicular to the backing, the adhesive on one side of the backing does not substantially overlap the adhesive on the opposing side of the backing. As a result, it is possible to use a stretch removable adhesive article that uses, for example, an aggressive adhesive to provide a reliable bond but still remove cleanly and easily from delicate substrates that would otherwise be damaged or destroyed if bonded with conventional adhesive constructions.

Claims

1. A dual-sided adhesive article comprising:

a flat and substantially elastic backing having first and second major surfaces;

a first adhesive coating the first major surface according to a two-dimensional first pattern; and

a second adhesive coating the second major surface according to a two-dimensional second pattern, wherein the first and second patterns do not substantially overlap with each other when the first and second patterns are projected onto a reference plane parallel to the backing, whereby areas of the backing coated by the first adhesive on the first major surface are substantially uncoated by the second adhesive on its opposing second major surface and areas of the backing coated by the second adhesive on the second major surface are substantially uncoated by the first adhesive on its opposing first major surface.

2. The article of claim 1, wherein the respective projections of the first and second patterns are generally spaced apart from each other by a gap.

3. The article of claim 2, wherein the first and second patterns are characterized by respective repeat units having a certain repeat dimension and the gap has an average width ranging from 10 percent to 500 percent of the repeat dimension for either the first or second pattern.

4. The article of claim 3, wherein the average gap has a width ranging from 50 percent to 250 percent of the repeat dimension for either the first or second pattern.

5. The article of claim 1, wherein the first and second patterns are discontinuous patterns.

6. The article of claim 5, wherein the first and second patterns comprise first and second sets of discrete parallel strips.

7. The article of claim 6, wherein the first and second sets of strips have respective terminal edges, the terminal edge of the first set being spaced further from the terminal edge of the backing than the terminal edge of the second set.

8. The article of claim 1, wherein the respective projections of the first and second patterns collectively extend across about 10 percent to about 95 percent of the overall surface area of the backing.

9. The article of claim 8, wherein the respective projections of the first and second patterns collectively extend across about 25 percent to about 60 percent of the overall surface area of the backing.

10. The article of claim 1, wherein the first adhesive extends across a first coating area ranging from about 30 percent to about 90 percent of the first major surface.

11. The article of claim 10, wherein the first coating area ranges from about 60 percent to about 75 percent of the first major surface.

12. The article of claim 10, wherein the second adhesive extends across a second coating area ranging from about 30 percent to about 90 percent of the first coating area.

13. The article of claim 12, wherein the second coating area ranges from about 50 percent to about 80 percent of the first coating area.

14. The article of claim 1, wherein either the first or second pattern is a randomized pattern.

15. The article of claim 1, wherein the first or second adhesive has a coating weight ranging from about 5 gsm to about 100 gsm.

16. The article of claim 15, wherein the coating weight ranges from about 20 gsm to about 75 gsm.

17. The article of claim 1, wherein the backing has an elastic recovery of at least 70 percent based on an elongation of 100 percent.

18. The article of claim 17, wherein the backing has an elastic recovery of at least 80 percent based on an elongation of 100 percent.

19. The article of claim 18, wherein the backing has an elastic recovery of at least 90 percent based on an elongation of 100 percent.

20. A dual-sided adhesive article comprising:

a planar backing having first and second major surfaces, the backing displaying elastomeric properties at room temperature;

a first adhesive coating the first major surface according to a two-dimensional first pattern; and

a second adhesive coating the second major surface according to a two-dimensional second pattern, wherein the collective area of overlap between the first and second patterns is less than 20 percent of the overall area of the first or second major surface as viewed from a direction perpendicular to the backing, whereby areas of the backing coated by the first adhesive on the first major surface are substantially uncoated by the second adhesive on its opposing second major surface and areas of the backing coated by the second adhesive on the second major surface are substantially uncoated by the first adhesive on its opposing first major surface.

21. The dual-sided adhesive article of claim 20, wherein the first and second patterns, when projected onto a reference plane parallel to the backing, are generally spaced apart from each other by a gap.

22. An adhesive assembly comprising:

a substrate; and

a dual-sided adhesive article contacting the substrate, the dual-sided article comprising;

a flat and substantially elastic backing having first and second major surfaces;

a first adhesive coating the first major surface along a two-dimensional first pattern;

a second adhesive coating the second major surface and adhering the backing to the substrate according to a two-dimensional second pattern, wherein the first and second patterns do not substantially overlap with each other when the first and second patterns are projected onto a reference plane parallel to the backing, whereby areas of the backing coated by the first adhesive on the first major surface are substantially uncoated by the second adhesive on its opposing second major surface and areas of the backing coated by the second adhesive on the second major surface are substantially uncoated by the first adhesive on its opposing first major surface.

23. The assembly of claim 22, wherein the substrate comprises an absorbent pad.

24. The assembly of claim 22, further comprising a release liner contacting the second adhesive and extending across the second major surface.

25. The assembly of claim 24, wherein the release liner is integrated into a packaging of the assembly.

26. The assembly of claim 22, wherein the backing further comprises a non-adhesive pull tab to facilitate peel removal of the assembly from a bonded substrate.