Retroreflective articles including optically active areas and optically inactive areas

Patent metadata

Field	Value
Publication number	US-9791604-B2
Application number	US-201013641363-A
Country	US
Kind code	B2
Filing date	Apr 15, 2010
Priority date	Apr 15, 2010
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

This disclosure generally relates to retroreflective articles and methods of making such articles.

First claim

What is claimed is:

1. A method of forming a retroreflective article, comprising:
providing a retroreflective layer including a structured surface that is opposite a second major surface;
providing a structured adhesive layer having raised areas and unraised areas, wherein at least some of the unraised areas further include barrier layers; and
attaching the structured adhesive layer to the structured surface such that the raised areas are in contact with the structured surface and the unraised areas are not in contact with the structured surface.

2. The method of claim 1 , wherein multiple raised areas surround unraised areas to form a discrete first region.

3. The method of claim 1 , wherein the structured adhesive layer is adjacent to a liner.

Assignees

• Free Michael Benton
• Mazurek Mieczyslaw H
• Thakkar Bimal V
• Smith Kenneth L
• Patel Suman K
• Coggio William D
• Pekurovsky Mikhail L
• Chiu Raymond C
• 3M Innovative Properties Co

Inventors

• Free Michael Benton
• Mazurek Mieczyslaw H
• Thakkar Bimal V
• Smith Kenneth L
• Patel Suman K
• Coggio William D
• Pekurovsky Mikhail L
• Chiu Raymond C

Classifications

• B32B3/263

  characterised by a layer having non-uniform thickness · CPC title

• B32B2307/418

  Refractive · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B27/32

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

• B32B27/36

  comprising polyesters · CPC title