Nonwoven adhesive tapes and articles therefrom

Patent metadata

Field	Value
Publication number	US-9426878-B2
Application number	US-201213811681-A
Country	US
Kind code	B2
Filing date	Oct 18, 2012
Priority date	Oct 25, 2011
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A conductive double-sided tape includes a conductive, nonwoven adhesive layer including an adhesive material, a nonconductive, nonwoven substrate having a plurality of passageways, and a plurality of conductive particles penetrating through the nonconductive, nonwoven substrate and the adhesive material. The nonconductive, nonwoven substrate is embedded in the adhesive material. The conductive particles have a D99 particle size larger than a thickness of the nonconductive, nonwoven substrate and the adhesive material.

First claim

The invention claimed is:

1. A conductive, double-sided tape comprising:
a conductive, nonwoven adhesive layer comprising:
an adhesive material;
a nonconductive, nonwoven substrate having a plurality of passageways, wherein the nonconductive, nonwoven substrate is embedded in the adhesive material; and
a plurality of conductive particles penetrating through the nonconductive, nonwoven substrate and the adhesive material, wherein the conductive particles have a D99 particle size larger than a thickness of the nonconductive, nonwoven substrate
wherein the conductive, double-sided tape exhibits only z-axis conductivity.

2. The conductive double-sided tape of claim 1 , further comprising a release liner positioned adjacent the conductive, nonwoven adhesive layer.

3. The conductive double-sided tape of claim 1 , further comprising a release liner positioned on at least one side of the conductive, nonwoven adhesive layer.

4. The conductive double-sided tape of claim 1 , wherein the conductive particles comprise at least one of: nickel, copper, tin or aluminum; silver coated-copper, -nickel, -aluminum, -tin or -gold; nickel coated-copper or -silver; silver coated- or nickel coated-graphite, -glass, -ceramics, -plastics, -silica, -elastomers or -mica; or combinations thereof.

5. The conductive double-sided tape of claim 1 , wherein the conductive double-sided tape is between about 25 and about 150 μm thick.

6. The conductive double-sided tape of claim 1 , wherein the adhesive material is a pressure sensitive adhesive material.

7. The conductive double-sided tape of claim 1 , wherein the adhesive material is a B-stageable adhesive material.

8. The conductive double-sided tape of claim 1 , further comprising at least one additional filler selected from the group consisting of: a heat conductive filler, a flame resistant filler, an anti-static agent, a foaming agent, polymeric microspheres and thermosets.

9. A conductive, single-sided tape comprising:
an adhesive material;
a nonconductive, nonwoven substrate embedded within the adhesive material;
a plurality of conductive particles penetrating through the adhesive material and the nonwoven substrate, wherein the conductive particles have a D99 particle size larger than a thickness of the nonwoven substrate; and
a metal layer positioned adjacent the nonwoven substrate
wherein the conductive, single-sided tape exhibits only z-axis conductivity.

10. The conductive, single-sided tape of claim 9 , further comprising a polymeric film or a multilayered polymeric film positioned adjacent the metal layer.

11. The conductive, single-sided tape of claim 10 , further comprising a carbon black polymeric binder coated on the polymeric film.

12. The conductive, single-sided tape of claim 9 , further comprising a carbon black polymeric binder coated on the metal layer.

13. The conductive single-sided tape of claim 9 , wherein the conductive particles comprise at least one of: nickel, copper, tin or aluminum; silver coated-copper, -nickel, -aluminum, -tin or -gold; nickel coated-copper or -silver; silver coated- or nickel coated-graphite, -glass, -ceramics, -plastics, -silica, -elastomers or -mica; or combinations thereof.

14. The conductive single-sided tape of claim 9 , wherein the conductive single-sided tape is between about 25 and about 150 μm thick.

15. The conductive single-sided tape of claim 9 , wherein the adhesive material is a pressure sensitive adhesive material.

16. The conductive single-sided tape of claim 9 , wherein the adhesive material is a B-stageable adhesive material.

17. The conductive single-sided tape of claim 9 , further comprising a filler selected from the group consisting of: a heat conductive filler, a flame resistant filler, an anti-static agent, a foaming agent, polymeric microspheres and thermosets.

Assignees

• 3M Innovative Properties Co

Inventors

• Choi Jeongwan

Classifications

• C09J9/02 Primary

  Electrically-conducting adhesives · CPC title

• C09J7/048

  Chemistry & Metallurgy · mapped topic

• H05K1/02 Primary

  Details · CPC title

• C09J7/21

  Paper; Textile fabrics · CPC title

• C09J7/20 Primary

  characterised by their carriers · CPC title