Adhesive article with a barrier layer

Patent metadata

Field	Value
Publication number	US-11028289-B2
Application number	US-201515529310-A
Country	US
Kind code	B2
Filing date	Dec 14, 2015
Priority date	Dec 16, 2014
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

Provided are adhesive articles that include a barrier layer that is substantially impermeable to oxygen gas at ambient temperature and pressure along with a heat-bondable layer, which could be a discrete layer adjacent to the barrier layer or integral with the barrier layer. The adhesive article further includes a backing extending across and coupled to the barrier layer and an adhesive layer extending across and coupled to the backing opposite the barrier layer. The barrier layer reduces or eliminates migration of plasticizers from the bonded seal into the adhesive article, limiting deterioration of tape performance over time.

First claim

What is claimed is:

1. An adhesive article comprising:
a barrier layer having opposed first and second major surfaces, the barrier layer being substantially impermeable to oxygen gas at ambient temperature and pressure;
a heat-bondable layer extending across and coupled to the first major surface of the barrier layer;
a polymeric foam backing extending across and coupled to the second major surface of the barrier layer; and
a pressure sensitive adhesive layer extending across and coupled to the backing opposite the barrier layer.

2. The adhesive article of claim 1 , further comprising a liner extending across and contacting a major surface of the adhesive layer opposite the backing.

3. The adhesive article of claim 1 , wherein the barrier layer comprises a polar-group-containing polymer.

4. The adhesive article of claim 3 , wherein the polar-group-containing polymer is ethylene vinyl alcohol copolymer.

5. The adhesive article of claim 3 , wherein the polar-group-containing polymer is an ionomer.

6. The adhesive article of claim 1 , wherein the barrier layer comprises a crosslinked polymer network.

7. The adhesive article of claim 1 , wherein the heat-bondable layer comprises a linear low density polyethylene.

8. The adhesive article of claim 7 , wherein the heat-bondable layer comprises a copolymer of linear low density polyethylene and octene.

9. A method of making an adhesive article comprising:
embedding a barrier layer between a a first and a second heat-bondable polymeric layers by coextrusion, wherein the barrier layer has opposed first and second major surfaces and is substantially impermeable to oxygen gas at ambient temperature and pressure; and wherein the first heat-bondable polymeric layer extends across and is coupled to the first major surface of the barrier layer;
coupling one of the heat-bondable layers to a first major surface of a polymeric foam backing; wherein the polymeric foam backing extends across and is coupled to the second major surface of the barrier layer and
coupling a pressure sensitive adhesive layer extends across and is coupled to the second major surface of the backing opposite the first major surface.

Assignees

• 3M Innovative Properties Co

Inventors

• Waid Robert D
• Meyer Scott R
• Zoller Panu K

Classifications

• B32B27/32 Primary

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• B32B27/28

  comprising synthetic resins not wholly covered by any one of the sub-groups {B32B27/30 - B32B27/42} · CPC title

• B32B37/02

  characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations · CPC title

• B32B25/042

  of natural rubber or synthetic rubber · CPC title

• C09J151/06

  grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond · CPC title