Polymeric multilayer film

Patent metadata

Field	Value
Publication number	US-10953574-B2
Application number	US-201716463903-A
Country	US
Kind code	B2
Filing date	Dec 4, 2017
Priority date	Dec 9, 2016
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

Polymeric multilayer film comprising at least two adjacent layers each exhibiting a random network of strands and connective regions. The polymeric multilayer films are useful, for example, for tape and graphic articles.

First claim

What is claimed is:

1. A polymeric multilayer film comprising at least two adjacent blown polymeric film layers, wherein at least some of the blown polymeric film layers comprise a random network of strands and connective regions, wherein the random network of strands has a first optical density and the connective regions have a second optical density, and wherein the first optical density is greater than the second optical density.

2. The polymeric multilayer film of claim 1 , wherein at least one blown polymeric film layer has an open porosity of at least 20 percent.

3. The polymeric multilayer film of claim 1 , wherein at least one blown polymeric film layer is separable from the remaining polymeric multilayer film.

4. The polymeric multilayer film of claim 1 , further comprising a continuous layer, wherein the continuous layer is free of openings extending from a first major surface thereof to a second major surface thereof.

5. The polymeric multilayer film of claim 4 , wherein the continuous layer is free of a pressure sensitive adhesive, and wherein at least one blown polymeric film layer comprises a pressure sensitive adhesive.

6. The polymeric multilayer film of claim 5 , wherein the continuous layer comprises a first pressure sensitive adhesive, and wherein at least one blown polymeric film layer comprises a second pressure sensitive adhesive different from the first pressure sensitive adhesive.

7. The polymeric multilayer film of claim 6 , wherein the continuous layer is a skin layer.

8. The polymeric multilayer film of claim 1 , wherein at least one of the first or second major surfaces of the polymeric multilayer film comprises a random network of strands and connective regions.

9. The polymeric multilayer film of claim 8 , further comprising a liner having a major surface attached to either the first or second major surface of the polymeric multilayer film.

10. The polymeric multilayer film of claim 9 , wherein the liner has a major surface exhibiting a random network of strands and connective regions.

11. The polymeric multilayer film of claim 1 having a machine and cross-machine direction, wherein the polymeric multilayer film is elastic in the cross-machine direction.

12. A graphic article comprising the polymeric multilayer film claim 1 .

13. A tape comprising the polymeric multilayer film of claim 1 .

Assignees

• 3M Innovative Properties Co

Inventors

• Young Jacob D
• Emslander Jeffrey O

Classifications

• B29C48/49

  using two or more extruders to feed one die or nozzle · CPC title

• B29L2023/001

  Tubular films, sleeves · CPC title

• B29C39/123 Primary

  Making multilayered articles · CPC title

• B29C48/185

  comprising six or more components, i.e. each component being counted once for each time it is present, e.g. in a layer · CPC title

• C09J7/20

  characterised by their carriers · CPC title