Static-dissipating adhesive tape
AssigneeRexam Industries Corp.
InventorLeonard Holley
Life of this patent
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Abstract
An electrostatic dissipating packaging tape is disclosed that comprises a transparent substrate, a substantially transparent adhesive layer on one surface of the substrate, and a clay coating on the opposite surface of the substrate from the adhesive. The clay is characterized by being able to provide a surface resistivity of 10.sup.14 ohms per square or less when present on a surface in amounts that are low enough to remain transparent, and the clay is present on the substrate surface in an amount sufficient to provide the coating with a surface resistivity of 10.sup.14 ohms per square or less, but less than an amount that would substantially reduce the transparent optical properties of the packaging tape.
Claims17
An electrostatic dissipating packaging tape comprising:
- a transparent substrate;
- a substantially transparent adhesive layer on one surface of said substrate;
- and
- a transparent clay coating on the opposite surface of said substrate from said adhesive, said clay coating providing a surface resistivity of less than 10.sup.14 ohms per square and greater than zero when present on said opposite surface in amounts that are low enough to remain transparent;
- and
- said clay being present in said coating on said substrate surface in an amount sufficient to provide said coating with a surface resistivity of less than 10.sup.14 ohms per square and greater than zero, but less than an amount that would substantially reduce the transparent optical properties of said packaging tape.
A roll of electrostatic dissipating adhesive tape, said roll comprising:
- a roll of a transparent polymer substrate in which one side of said substrate is coated with a substantially transparent layer of a static dissipating clay composition and the opposite side is coated with a substantially transparent adhesive layer;
- said transparent clay layer providing a surface resistivity of less than 10.sup.14 ohms per square and greater than zero on said substrate surface in amounts that are low enough to remain transparent, and said clay being present in said layer on said substrate surface in an amount sufficient to provide said clay layer with a surface resistivity of less than 10.sup.14 ohms per square and greater than zero, but less than an amount that would substantially reduce the transparent optical properties of said packaging tape;
- and
- said adhesive comprising a substantially non-blocking adhesive present on said substrate in an amount that will permit the tape to be unrolled from itself without removing the antistatic composition.
Dependencies are inferred from the claim text.