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Tape Glossary | A

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ABRASION RESISTANCE: The ability of a tape to withstand rubbing and/or scuffing and still function satisfactorily.
ACLAR FILM: A chlorofluorocarbon film used in applications requiring clarity and very low moisture vapor transmission rate. (Registered Trademark of Allied Chemical Corp.)
ACETATE FILM: A transparent film produced by chemically treating cellulose. Provides moisture resistance and aging characteristics superior to those of cellophane.
ACRYLIC ADHESIVE: A pressure-sensitive adhesive formed by the polymerization of acrylic ester monomers, and which generally exhibits excellent clarity, aging and weathering characteristics.
ADHESION: A measure of the ability of a pressure-sensitive tape to adhere to a specified surface under specific conditions of application and removal. This is usually expressed in the amount of force, in ounces per inch width, required to remove a piece of tape from a polished steel surface by pulling it back on itself at a 180 degree angle at the rate of 12" per minute. Adhesion is only one of the factors determining the sticking qualities of a tape, other factors are:

Feel: Feel is the degree of stickiness of the adhesive as determined by touching it with one's fingers. This is often a misleading test of effective adhesion.
Finger-Stick: See "Feel".
Hold: Refers to the ability of a tape to adhere for long periods of time to a specific surface while under a specified stress. Hold is tested by applying a small area of tape to a specific surface and hanging a weight to the free end of tape. Values are stated as hours and minutes transpiring between application and failure. Sometimes hold is tested at0 degree pull-off and sometimes 20 or 90 degree pull-off. Hold values are especially significant determining suitability of tape for packaging where constant stress on the tape is in effect.
Peel: The force required to pull a strip of tape from a surface at a specific angle and speed. Measured after application under specified standard condition, and usually expressed in ounces per inch width.
Quick-Stick: Refers to the ability to adhere to a specific surface after a very brief contact at a very low pressure.
Shear Adhesion: The bond strength of a tape when stressed at a 0 degree angle.
Specific Adhesion: Refers to ratio of adhesion to a particular surface as compared with any other surface as a standard.
Tack: Refers to the sticky feel of the adhesive. Can be measured by rolling ball method. Expressed as a ratio of height of the drop of a ball to distance traveled in a horizontal guided track.

ADHESION TO BACKING: Bond produced by the contact between a pressure-sensitive tape adhesive and the tape backing, when one piece of tape is applied over another piece. Generally measured by a Peel Test.
ADHESION TO STEEL TEST: Used to determine the force required to remove pressure-sensitive tape from a steel panel.
ADHESIVE: The pressure-sensitive layer applied to a tape. There are a number of adhesive types. The most common is a combination of rubber and resin-either natural and/or synthetic rubbers are combined with resins to produce pressure-sensitivity. Other adhesives are: Acrylic adhesives, which are synthetic polymers that generally exhibit tack without the addition of resins: and Silicone Adhesives (Silicone gums and resins), which have the highest service temperature capability of the common pressure-sensitive adhesives as well as excellent aging and weathering characteristics.
ADHESIVE DEPOSIT: Adhesive that is pulled away from the tape and remains on the surface after the tape is removed.
ADHESIVE SPLITTING: Occurs when a part of the adhesive remains as a layer on the surface from which the tape was removed. See "Anchorage".
ADHESIVE TRANSFER: Adhesive deposited from its normal position on the tape to the surface to which the tape was in contact. Can occur, either during unwind or removal.
AGING: Controlled temperature and humidity conditioning to provide a guide to any deterioration of the finished product that may be attributed to aging.
AMBIENT TEMPERTAURE: Normal fluctuating temperatures in an environment where the conditions are not closely controlled-e.g. in a typical warehouse, boxcar, office building, etc.
ANCHORAGE: Refers to the degree of adhesion the adhesive has for the backing on which it is carried. Insufficient anchorage results in complete transfer of the adhesive to another surface when the tape is removed. This is distinct from splitting, where only a layer of adhesive is transferred. See "Adhesive Splitting".
ANTIOXIDANT: A chemical added to an adhesive that protects it from oxygen deterioration during aging, thus extending the usable life of the tape.
ASTM: The American Society for Testing and Materials-an independent body which establishes testing methods and standards.

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