Call Us: (760) 724-0664

Water Vapor Transmission (WVTR)

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

Water Penetration Rate (WPR)

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

Unwind or Unwind Adhesion

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

Transfer Tape

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

Thickness (caliper, gauge)

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.

Tensile Strength (Breaking Strength)

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

Telescoping

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.

Tear Resistance

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

Tack

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.

Surface Treating

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.

Surface Energy (Surface Wetting Ability)

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.

Subsequent Adhesion

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

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).

Continue reading

Slivering

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

Slitting/Rewinding

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.

Continue reading

Single Faced

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

Shear Strength After Solvent Immersion

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

Shear Adhesion

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.

Self-Seal

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.

Saturation (Impregnation)

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