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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.

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Pouching

Pouching – the process of packaging a product in a multi-layer laminated structure, which can be plastic, foil, or paper with a heat sealable coating on the material.

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Class A Die Cutting

Class A Die Cutting – a process using a male and femaleprecision die set, also known as "compound tooling".This type of tooling will produce the highest quality of cut with the least amount of burrs on the die cuts and the closest tolerances in the industry (+/- .001").

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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).

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Rotary Die Cutting

Rotary Die Cutting – the process of using a cylindrical engraved hardened steel tool to cut materials at high speeds and close-tolerance cutting.Many layers of materials can be cut at one time, using different materials and cutting dies in registration to produce your most complex parts.

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Corona Resistance

The ability of an elastometric adhesive, coating, or sealer acting as an insulator to withstand the effects of high voltage discharge. 

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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.

Slivering

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

Single Faced

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