ADHESIVE ARTICLES WITH DISCONTINUITIES AND METHODS OF MAKING THE SAME

• US 20080138591A1
• Filed: 12/08/2006
• Published: 06/12/2008
• Est. Priority Date: 12/08/2006
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Graham, Paul D., Romsos, Jason D.
• Granted Patent: US 7,674,345 B2
• Time in Patent Office: Days
• US Class Current: 428/211.1
• CPC Class Codes: B31D 1/02 the articles being labels or tags
• CPC Class Codes: C09J 2301/18 characterized by perforations in the adhesive tape
• CPC Class Codes: C09J 2301/412 presence of microspheres
• CPC Class Codes: C09J 2423/006 in the substrate
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 2467/006 in the substrate
• CPC Class Codes: C09J 7/241 Polyolefin, e.g.rubber
• CPC Class Codes: C09J 7/255 Polyesters
• CPC Class Codes: Y10S 428/914 Transfer or decalcomania
• CPC Class Codes: Y10S 428/915 Fraud or tamper detecting
• CPC Class Codes: Y10T 156/1052 with cutting, punching, tearing or severing
• CPC Class Codes: Y10T 156/1056 Perforating lamina
• CPC Class Codes: Y10T 156/1062 Prior to assembly
• CPC Class Codes: Y10T 428/1471 Protective layer
• CPC Class Codes: Y10T 428/1486 Ornamental, decorative, pattern, or indicia
• CPC Class Codes: Y10T 428/1495 Adhesive is on removable layer
• CPC Class Codes: Y10T 428/15 Sheet, web, or layer weakened to permit separation through thickness
• CPC Class Codes: Y10T 428/24612 Composite web or sheet
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• CPC Class Codes: Y10T 428/24934 including paper layer

Abstract

A method of introducing discontinuities to an adhesive coated region of a substrate is provided. The method includes the steps of (a) providing a web having upper and lower edges; (b) excising a portion of the web creating open sections interposed between retained sections connected to carrier sections, each including the upper or lower edge of the web to yield a patterned web; (c) perforating the patterned web such that the perforations span from one open section to the next open section to yield a perforated web; (d) contacting the perforated web to the adhesive coated region of the substrate; and (e) removing the carrier sections at the perforations leaving the retained sections on the substrate

Claims

1. A method of adding discontinuities to an adhesive coated region of a substrate comprising the steps of:

providing a web having upper and lower edges;

excising a portion of the web creating open sections interposed between retained sections connected to carrier sections, each including the upper or lower edge of the web to yield a patterned web;

perforating the patterned web such that the perforations span from one open section to the next open section to yield a perforated web;

contacting the perforated web to the adhesive coated region of the substrate; and

removing the carrier sections at the perforations leaving the retained sections on the substrate.

2. The method of claim 1, wherein the retained sections are discrete.

3. The method of claim 1, wherein the perforations are disposed on a location of the perforated web selected from the group consisting of on the retained sections, between the retained sections and the carrier sections, and on the carrier sections.

4. The method of claim 1, wherein the adhesive region has an associated width and length and wherein the retained sections spans substantially nearly the entire width and or substantially nearly the entire length of the adhesive region.

5. The method of claim 1, wherein the excising step and the perforating step are combined in one step.

6. The method of claim 1, wherein the adhesive region has substantially parallel upper and lower edges, wherein in the contacting step, the perforation of the perforated web substantially coincides with at least one of the upper and lower edges of the adhesive region.

7. The method of claim 1, wherein the web is selected from the group consisting of paper and polymeric film.

8. The method of claim 7, wherein the polymeric film is selected from a group consisting of polyethylene terephthalate, polypropylene, polyethylene, and copolymers thereof.

9. The method of claim 1, wherein the adhesive of the substrate is a repositionable pressure sensitive adhesive.

10. The method of claim 9, wherein the repositionable pressure sensitive adhesive is polyacrylate based microsphere.

11. The method of claim 1, wherein after the contacting step and prior to the removing step, the method further comprises the step of applying pressure to at least one of the perforated web and substrate.

12. An article comprising:

a substrate having a repositionable pressure sensitive adhesive region defined by upper and lower edges; and

a plurality of non-adhesive sections disposed on a portion of the adhesive region creating open sections of exposed adhesive interposed between the non-adhesive sections, a portion of which spans substantially continuously from the upper to the lower edge of the adhesive region.

13. The article of claim 12, wherein the repositionable pressure sensitive adhesive is polyacrylate based microsphere.

14. The article of claim 13, wherein the substrate is paper and the non-adhesive section is selected from the group consisting of paper and polymeric film.

15. The article of claim 14, wherein the polymeric film is selected from the group consisting of polyethylene terephthalate, polypropylene, polyethylene, and copolymers thereof.

16. The article of claim 12, wherein the non-adhesive section is discrete.

20. The easel pad of claim 16, wherein the non-adhesive section is discrete and has a thickness of less than about 0.2 mm.

17. An easel pad comprising:

a plurality of sheets stacked on top of one another each having opposing writeable first and second surfaces, and upper and lower edges; and

a securing mechanism disposed on the second surface of the sheet, the mechanism comprising;

(i) a repositionable pressure sensitive adhesive having upper and lower edges disposed proximate to the upper edge of the sheet;

(ii) a plurality of non-adhesive sections disposed on the adhesive creating open sections of exposed adhesive interposed between the non-adhesive sections, a portion of which spans substantially continuously from the upper to the lower edge of the adhesive.

18. The easel pad of claim 17, wherein the non-adhesive sections are selected from the group consisting of paper and polymeric film.

19. The easel pad of claim 18, wherein the polymeric film is selected from a group consisting of polyester terephthalate, polypropylene, polyethylene, and copolymers thereof.