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US 5,958,537 AGranted
Static dissipative label
AssigneeBrady USA, Inc.
InventorSohail Akhter
Life of this patent
Estimating the term…
Abstract
Static dissipative labels are described which comprise a polyester or polyimide backing film laminated to a conductive primer layer which in turn is laminated to a pressure-sensitive adhesive layer. The primer layer and adhesive layer contain conductive particles, e.g. metals, and the conductive particles in the adhesive layer are arranged such that they span the thickness of the layer.
Claims19
A static dissipative label consisting essentially of:
- A. A polyester or polyimide backing film having opposing first and second surfaces, the first surface adapted to carry printed information;
- B. A primer layer having opposing first and second surfaces, the first surface of the primer layer in intimate contact with the second surface of the backing film, the primer layer consisting essentially of:
- 1. A phenoxy or polyester binder resin matrix, and
- 2. Conductive particles comprising (i) inorganic oxides coated with a conductive material, or (ii) conductive polymers, the conductive particles homogeneously dispersed throughout the binder resin matrix;
- and
- C. A pressure-sensitive adhesive layer containing conductive particles which extend from a first surface of the adhesive layer to a second surface of the adhesive layer, and first surface of the adhesive layer in intimate and binding contact with the second surface of the primer layer.
3 more elements
A static dissipative label consisting essentially of:
- A. A polyester or polyimide backing film having opposing first and second surfaces, the first surface adapted to carry printed information;
- B. A primer layer having opposing first and second surfaces, the first surface of the primer layer in intimate contact with the second surface of the backing film, the primer layer consisting essentially of:
- 1. A phenoxy or polyester binder resin matrix, and
- 2. Conductive particles comprising (i) inorganic oxides coated with a conductive material, or (ii) conductive polymers, the conductive particles homogeneously dispersed throughout the binder resin matrix;
- and
- C. A pressure-sensitive adhesive layer having a thickness in the range from about 15 to about 75 microns and containing conductive particles which extend from a first surface of the adhesive layer to a second surface of the adhesive layer, and the first surface of the adhesive layer is in intimate and binding contact with the second surface of the primer layer, the conductive particles of the adhesive layer comprising less than 9 weight percent of the combined weight of the conductive particles and pressure-sensitive adhesive in the adhesive layer.
3 more elements
A process for making a static dissipative label comprising:
- A. Providing a polyester or polyimide backing film having opposing first and second surfaces;
- B. Applying a primer to the second surface of the backing film to form a primer layer in intimate contact with the second surface of the backing film, the primer layer consisting essentially of:
- 1. A phenoxy or polyester binder resin matrix, and
- 2. Conductive particles comprising (i) inorganic oxides coated with a conductive material, or (ii) conductive polymers, the conductive particles homogeneously dispersed throughout the binder resin matrix;
- and
- C. Applying a pressure-sensitive adhesive containing conductive particles to the primer layer formed in step B to form a pressure-sensitive adhesive layer having a first surface and a second surface, the first surface of the adhesive layer in intimate and binding contact with the primer layer and the conductive particles extending from the first surface of the adhesive layer to the second surface of the adhesive layer.
3 more elements
Dependencies are inferred from the claim text.