An occlusive coating applied to the non-pressure sensitive side of a porous backing such as paper in order to provide a satisfactory surface that the pressure sensitive adhesive can contact when the tape is wound into a roll.

Penetration through the tape of a coloring material (paint, etc.) onto the surface to which the tape is applied.

Adhesion between the sheets of the plies of rolls of coated material, usually due to extreme conditions of pressure, temperature, or humidity.

The ability of a tape to resist damage when a force is applied evenly and perpendicularly to the surface of a tape.

The thickness (as of a sheet of paper) measured under specific conditions.

A webstock that holds a pressure-sensitive adhesive, especially used to refer to double-faced or double-coated tapes.

The weight of coating per unit area.   In SI-units expressed as grams/square meter. 

The ability of the adhesive to resist shear stress and splitting.   Good cohesion is necessary for clean removal.

The tendency of a pressure sensitive adhesive to act as a heavy viscous liquid over long  periods of time.  Such phenomena as oozing and increase in adhesion with time are the result of this characteristic.

The ability of a tape to retain its original color, particularly when exposed to light.

The slow movement of the adhesive or backing under shear stress.

Developing a three-dimensional molecular structure in an adhesive normally activated by heat or irradiation.  An improvement in shear resistance, high temperature resistance, and oil or solvent resistance will normally result.

To alter the properties of an adhesive by chemical reaction, which may be condensation, polymerization, or vulcanization.   Usually accomplished by the action of heat and catalysts, alone or in combination, with or without pressure.

The tendency of paper by itself or in a laminate to bend or partly wrap around the axis of one of its dimensions.

A separation or splitting of the tape such as the separation of the backing into two distinct layers, separation between laminations of a tape consisting of more than one backing, separation between filaments and backing of a filament-reinforced tape, or separation of the adhesive from the backing.

The measure of the maximum voltage stress that a single layer of tape can withstand before dielectric failure occurs, the test being carried out under prescribed conditions.

That property of a material that relates to the constancy of its dimensions, particularly in relation to external influences such as moisture or temperature.

An adhesive application to both sides of a backing.

The peeling back or lifting of the outer edge of an applied tape in a curved manner.

The tendency for the edge of an adhesive label to lift from a surface to which it has been adhered.