EDGE COATINGS FOR TAPES

• US 20100304096A2
• Filed: 05/06/2009
• Published: 12/02/2010
• Est. Priority Date: 05/06/2008
• Status: Active Grant

• Current Assignee: Intertape Polymer Corporation (Intertape Polymer Group Incorporated)
• Original Assignee: Intertape Polymer Corporation (Intertape Polymer Group Incorporated)
• Inventors: Lewandowski, Mark, Tynan, John, Chrzanowski, Deborah, Rhude, Paul
• Granted Patent: US 8,691,381 B2
• Time in Patent Office: Days
• US Class Current: 428/192
• CPC Class Codes: B05B 12/24 made at least partly of flexible material, e.g. sheets of paper or fabric
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C09J 2203/31 as a masking tape for painting
• CPC Class Codes: C09J 2400/163 in the substrate
• CPC Class Codes: C09J 2400/283 in the substrate
• CPC Class Codes: C09J 2433/00 Presence of (meth)acrylic polymer
• CPC Class Codes: C09J 7/20 characterised by their carriers
• CPC Class Codes: C09J 7/21 Paper; Textile fabrics
• CPC Class Codes: C09J 7/28 Metal sheet metallised plastics C09J7/22
• CPC Class Codes: Y10T 428/14 Layer or component removable to expose adhesive
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material
• 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
• CPC Class Codes: Y10T 428/2891 including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof

Abstract

Disclosed is a tape including a substrate having an adhesive layer applied thereto and an edge coating. The substrate and the adhesive together provide at least one masking edge where the edge coating is applied. The edge coating includes a lipophilic agent, a flocculating agent, or combinations thereof. The edge coating provides the tape with enhanced masking ability by preventing paints, varnishes, paint strippers, and other coating compositions from infiltrating the tape substrate or the interface between the tape and an adherend.

Claims

1. A tape comprising:

a substrate having an adhesive layer applied thereto, the substrate and the adhesive together providing at least one masking edge, the masking edge being a cut surface of the tape; and

an edge coating applied to the at least one masking edge, the edge coating including an inorganic salt flocculating agent.

10. The tape of claim 1 wherein the edge coating prevents or reduces the tendency for an applied paint or coating from being absorbed into the substrate or from penetrating the interface between the adhesive layer and an adherend.

11. The tape of claim 1 wherein the flocculating agent is a polyvalent metal salt.

12. The tape of claim 1 wherein the flocculating agent is aluminum chlorohydrate.

13. The tape of claim 11 wherein the edge coating is applied as an aqueous solution.

14. The tape of claim 13 wherein the solution has a concentration of at least about 40% of the agent.

17. The tape of claim 1 wherein the edge coating is applied to both edges of the tape.

18. The tape of claim 1 wherein the substrate is paper.

19. The tape of claim 1 wherein the adhesive is an acrylic adhesive, a block copolymer adhesive, or a natural rubber adhesive.

20. The tape of claim 1 wherein the substrate is foil.

22. The tape of claim 1 wherein the inorganic salt flocculating agent includes at least one member of the group consisting of aluminum chlorohydrate, aluminum hydroxide, aluminum sulfate, ferrous sulfate, ferrous sulfide, ferric sulfate, ferric hydroxide, calcium sulfate, calcium carbonate, calcium hydroxide, and Fe₂(SO₄)₃FeCl₃.

23. The tape of claim 22 wherein the inorganic salt flocculating agent includes aluminum chlorohydrate.

24. The tape of claim 1 wherein the edge coating is applied as an aqueous solution.

25. The tape of claim 24 wherein the aqueous solution has a concentration of at least about 40% of the inorganic salt flocculating agent.

26. The tape of claim 25 wherein the edge coating has a dry coating weight of about 0.1 g/m² to about 50 g/m².

27. The tape of claim 1 wherein the edge coating is applied as a dispersion or a powder.

28. The tape of claim 1 wherein the edge coating has a dry coating weight of about 0.1 g/m² to about 50 g/m².

2-9. -9. (canceled)

15-16. -16. (canceled)

21. (canceled)