The weight of water vapor allowed through a controlled area of tape within a specified time period and under allowed conditions.

The weight of water transmitted through a controlled area of tape under a specified time and conditions.

The force required to remove tape from a roll under prescribed conditions.

A pressure sensitive adhesive unsuppported applied to a two-release coated liner.

The perpendicular distance from one surface of either a tape, backing, or adhesive to the other, usually expressed in mils, thousanths of an inch, or millimeters.  This is usually measured under controlled slight pressure with a special gauge.

The force required to break a unit width of tape by controlled pulling on opposite ends of the piece.

A sideways sliding of the tape layers, one over another, such that the roll looks like a funnel or a telescope, usually occurring over a period of time.

The force required to propagate a tear in a tape in a given direction after the tear has been initiated.

The property of a pressure sensitive adhesive that allows it to adhere to a surface under very slight pressure.   It is determined by the ability of the adhesive to wet quickly the surface it contacts.

Any method of treating a polyolefin so as to alter the surface and render it receptive to inks, paints, lacquers, and adhesives, such as chemical, flame and electronic oxidation.

The measure of surface tension in dynes.  The lower the surface energy of a substrate, the more difficult it becomes for an adhesive or coating to wet out that surface.

The force required to remove a unit width of pressure sensitive tape from a standard panel after it has been in contact with a release liner for a given period of time.   This must be compared with the adhesion of the same tape that has  not been in contact with the release liner to determine the degree of loss of adhesion.

Steel Rule Die Cutting – the process of using a flat die made with wood and hardened steel rules.This process is best suited for lower quantity orders where raw materials come in sheet form only and thicker materials that can be cut with straight edges (e.g. 2" thick foams).

When the tape tears or breaks into small pieces, either on unwind or on removal from a surface.

Slitting/Rewindingis a shearing operation that cuts a large roll of material into narrower rolls. There are two types of slitting: log slitting and rewind slitting. In log slitting the roll of material is treated as a whole (the 'log') and one or more slices are taken from it without an unrolling/re-reeling process.

A tape to which a pressure sensitive adhesive is applied to only one side of the backing.

The force required to separate a bond by shear force after immersion in a typical varnish solvent under designated conditions.

The time required, under specified test conditions (surface area, weight load), to slide a standard area of pressure sensitive tape from a standard flat surface in a direction parallel to the surface.

An adhesive joint that is accomplished by coating both adhered surfaces, and bringing them under pressure; an elastomeric adhesive (cohesive) used on envelope flaps, box closures, etc., whereby the adhesive film will bond only to itself.

Adding materials (saturant) to the backing for improvement of physical properties and resistance to various deleterious environments.