A
	Abrasion Resistance	The ability of a tape to withstand rubbing and friction and still function satisfactorily.
	Accelarated Ageing	A means whereby the deterioration of a tape may be accelerated in the laboratory
	Accelerated Weathering	A means whereby the deterioration of a tape caused by outdoor exposure may be accelerated in the Laboratory
	Acetate	A transparent film which is used for various reasons as a tape backing. The primary characteristic is that of being more moisture resistant than cellophane
	Acrylic Polymer	A synthetic polymer with excellent ageing characteristics that can be used either as a single component adhesive or a coating or a saturant, depending upon composition
	Adhesion	The state in which two surfaces are held together by interfacial forces
	Adhesion Build Up	An increase in the adhesion value of a pressure sensitive tape after it has been allowed to dwell on the substrate
	Adhesion to backing	The force required to remove a tape ( in the same manner as peel adhesion ) from its own backing to which it has been reapplied with a definite pressure after being removed from the roll
	Adhesive Deposit	Adhesive which is pulled away from the tape on removal and remains on the substrate
	Adhesive Failure	Failure of an adhesive bond so that the separation is at the interface of adhesive and substrate and no residue is left on the substrate
	Adhesive Maas	See Pressure Sensitive Adhesive
	Adhesive Residue	See Adhesive Deposit
	Adhesive Transfer	The transfer of adhesive from its normal position on the tape to the surface to which the tape was attached, either during unwinding or removal
	B
	Backing	The flexible supporting film, fabric, foil, or paper to which a pressure sensitive adhesive is applied
	Bleeding	See Migration
	Blocking	An undesired adhesion between touching layers of material
	Breaking Load	The force required to break a unit width of tape under prescribed conditions
	Breaking Strength	See Breaking Load
	Bursting Strength	The ability of a tape to resist damage when force is applied perpendiculalry to the surface of the tape
	C
	Caliper	See Thickness
	Carrier	The base material onto which a pressure sensitive adhesive is applied, on both faces, to produce a double-sided tape
	Cellophane	A thin transparent film manufactured from wood pulp
	Cellulose Acetate	See Acetate
	Closed Side ( Adhesive )	That surface of the adhesive on a double sided tape which normally remains in contact with the release liner during Unwinding
	Closed Side ( Liner )	Is that surface of a release liner which normally remains in contact with the adhesive during unwinding
	Coated Cloth	Fabric with a rubber or plastic back coating to give increased moisture resistance and lower wear
	Cohesion	The ability of an adhesive to resist splitting
	Cohesive Failure	Failure of an adhesive bond such that the separation is within the adhesive
	Cohesive Strength	As Cohesion
	Colour	Usually describes the colour of a tape when looking at the backing, regardless of the colour of the adhesive
	Conditioning	The process of subjecting material to specific temperatures and relative humidity conditions for a defined period of time
	Conformability	The ability of tape to fit tightly or make essentially complete contact with the surface of an irregulary shaped object without creasing or folding
	Core	The inner cardboard or plastic cylinder on which the tape is wound
	Creep	A flow movement of the adhesive or backing under stress
	Creped Paper	Paper having small regular folds to give higher elongation than a flat back paper of the same weight
	Cross-Linking	The development of a three-dimensional structure within an adhesive to improve cohesive strength, temperature, oil or solvent resistance
	Cured	See Cross-Linking
	Curling	The tendency of a tape to curl back on itself when unwound and allowed to hang from the roll
	D
	Dead Stretch	The increase of length of a piece of tape after it has been stretched without breaking and allowed to relax
	Delamination	A splitting of the backing or carrier into two distinct layers
	Dishing	See Telescoping
	Double Coated	A tape which has two available pressure sensitive adhesive coated surfaces
	Double Faced	See Double Coated
	Double Sided	See Double Coated
	E
	Easy Unwind Treatment	See Release Coating
	Edge Curl	The peeling back or lifting of the outer edge of a tape after application
	Elastic Memory	A tendency of some tape backings to attempt to return to their original length after becoming elongated
	Electrical Strength	The voltage at which breakdown of the tape occurs under the prescribed testing conditions divided by the distance of the two electrodes between which the voltage is applied
	Electrolytic Corrosion Factor	An indirect measure of the tapes corrosive effect on a copper conductor
	Elongation at Break	The amount a tape has stretched lengthwise at the point of breaking. It is expressed as a percentage of the original unstretched length
	F
	Filaments	Thin longitudinal threads of glass, polyester, Nylon or other high strength materials
	Film	Uniform, homogeneous, non-fibrous synthetic webs
	Fisheyes	Relatively small deformations ( pockmarks ) in the adhesive caused by the inclusion of air between layers in the roll. These are not an indication of a quality defect
	Flagging	A peeling away from the surface or tape backing of the end of a length of tape, particularly in a spiral wrapped application
	Flame Resistance	The ability of a tape to withstand exposure to flame, fireproof materials will not burn when exposed to flame flame resistant ( fire retardant, self extinguishing ) Materials will burn when exposed to flame but not continue to burn after the flame is removed
	Flatback	A term used to describe a smooth paper backing for a tape to distinguish it from creped paper backings
	Flexibility	The ability of a tape to be freely bent or flexed during application, particularly applicable in low temperature use
	Fluting	Distortion of a roll of tape such that layers no longer form a circle
	Foam	A soft cushion material formed by creating bubbles in base materials, such as natural or synthetic rubbers, or other elastomeric materials
	G
	Gapping	Opening between layers of tape in a roll
	Gauge	See Thickness
	Gloss	The measure of the reflectiveness of a tape backing, generally expressed by such terms as glossy, low gloss dull, etc. A more specific definition is on the Gardner scale which measures absorption of light reflected from a beam with a stated angle of incidence
	H
	Heat resistance	The ability of a tape to withstand a specified temperature
	High Speed Unwind	Unwinding or dispensing of tapes at a relatively high speed, usually over 15 metres per minute
	Holding Power	The ability of the adhesive to resist forces applied in the same plane as the tape
	Hot melt Pressure Sensitive Adhesive	A pressure sensitive adhesive applied to the backing in a hot molten form which cools to form a conventional pressure sensitive adhesive
	I
	Impact Resistance	The ability of a tape to resist sudden shocks as may sometimes be encountered by packages in transit
	Insulating Tape	Tapes used for electrical insulation
	Insulation Resistance	The ability of a tape to prevent the flow of a current across the surface of the backing
	Interleave	See Release Liner
	Interliner	See Release Liner
	Internal Bond	As Cohesion
	K
	Key	The bond between the adhesive and the carrier or backing
	Key Coat	See Prime Coat
	Key Failure	Failure of an adhesive bond such that separation is at the interface of adhesive and carrier or backing
	Kraft	A sulphate wood pulp paper
	L
	Label Stock	Pressure sensitive materials which are usually printed, frequently die-cut, furnished in roll or sheet form with an interleave, and intended for use as labels
	Laminate, Lamination	Combinations of two or more materials which function as one backing e. g Polyurethane foam and polyester film
	Lifting	Occurs when sections of tape loses contact with the surface to which the tape is applied
	Liner	See Release Liner
	Low Tack Tape	Used ( often incorrectly ) to describe a pressure sensitive tape which has low adhesion
	M
	Metal Foil	Thin flexible sheets of metal such as aluminium or lead used as tape backings
	Migration	The movement over a period of time, of an ingredient from one component to another when the two are in surface contact. May occur between tape components or between a tape and the substrate
	O
	Off Core	Layers of tape are in correct alignment, but tape is displaced sideways on core
	Offsetting	The movement of a component of a tape, usually the adhesive, from its proper place to some other position. This transfer may occur during unwinding of the tape, or on removal of the tape from the substrate
	Oozing	A squeezing out of the adhesive from under the backing, occurring when the tape is in roll form
	Opacity	The ability of a tape to prevent the transmission of light
	Open Side ( Adhesive )	That surface of the adhesive on a double sided tape which is exposed on normal unwinding or separation
	Open Side ( Liner )	Is that surface of a release liner which is exposed on normal unwinding or separation
	P
	Peaking	Large singular upheavals in the outer layers of a roll of tape
	Peel Adhesion	The force required to peel a strip of tape from a substrate at a specified angle and speed
	Permanent Adhesive	An adhesive that has been designed to remain permanently in position under the specified service Conditions
	Pinholes	A very small defect in a tape which may permit the passage of light or electricity or water vapour. The minute holes may be in the backing and/or the adhesive
	Plasticised Polyvinylchloride	A tough durable plastic film having excellent resistance to oils, chemicals and many solvents. It can also be coloured. Its high stretch is due to the addition of a plasticizer
	Polyester	A strong film having good resistance to moisture, solvents, oils, caustics and many other chemicals. It is usually transparent
	Polyethlene	A tough, stretchy film having very good low temperature characteristics
	Polypropylene	A similar film to polyethylene, but stronger and having a higher temperature resistance
	Polyvinylidene Chloride	A usually very thin transparent film with excellent resistance to acids, water and organic solvents
	Pre-release	The unwanted separation of a tape from its release liner during unwinding
	Pressure Sensitive Adhesive	A type of adhesive, which is permanently tacky at room temperature and when applied to a variety of surfaces,forms an immediate bond. The bond strength may increase by pressure with time
	Pressure Sensitive Tape	A term used to describe a category of tape coated on one or both faces with a pressure sensitive adhesive. It is permanently tacky at room temperature and requires no activation by water, solvent or heat to adhere to a variety of dissimilar surfaces upon contact. in some cases the adhesive may be further cured by heating after application. The bond strength may be increased by pressure and/or time
	Prime Coat	a coating on the adhesive side of the backing, which acts as a bonding agent between adhesive and backing
	Printability	The ability of a tape to accept and hold a printed legend, and especially to resist offsetting of the print when unwound from a roll
	Q
	Quick Stick	See Tack
	R
	Reinforcement	A material which strengthens the backing and/or the adhesive
	Release Coating	A coating applied to a tape backing to facilitate the unwinding of the tape
	Release Liner	A removable material which protects the adhesive face or faces
	Removable Adhesive	An adhesive that has been designed to allow subsequent removal, without damaging or contaminating the substrate under specified conditions
	Removal	The act of pulling tape away from the substrate
	Resistance to Acids, Alkalies	The ability of a tape to resist exposure to such conditions after application and to perform satisfactorily
	Resistance to Oils, Grease, etc	The ability of a tape to resist exposure to such conditions after application, and to perform satisfactorily
	Resistance to Weather. Solvents	The ability of tape to resist exposures to such conditions after application and perform satisfactorily
	Roll Ageing Resistance	See Storage Stability
	S
	Shear Adhesion	See Holding Power
	Shock Resistance	See Impact Resistance
	Shrinkage	Reduction in any dimension of a tape
	Single Faced	The adhesive is applied to one surface of the backing only
	Slivering	Tape tears or breaks into small pieces, either on unwinding or on removal from a surface
	Splitting	See Delamination
	Stain	A discoloration of the substrate
	Stain Resistance	The ability of a tape to be applied to a substrate without discolouring the substrate
	Stiffness	The measure of a tapes flexibility and conformability
	Storage Stability	The ability of a tape to retain a specified level of its original properties after defined conditions of storage
	Substrate	The surface to which a pressure sensitive tape is applied
	T
	Tack	The property of an adhesive tape that causes an instant bond, with measurable force, during the contact of the adhesive and a substrate without externally applied pressure
	Tear Resistance	The ability of a tape to resist tearing
	Telescoping	Describes the shape of a roll of tape which has changed from being flat to become conical or dish-shaped
	Tensile Strength	The force required to break unit cross section area of the tape. It is a property of the material which is independent of the thickness of the sample
	Thermoplastic	Softens on heating. Reverts to original state when cooled. This process may be repeated
	Thermosetting	Becomes firmer on heating and remains so on cooling. thermosetting of adhesive improves solvent resistance and increases softening temperature
	Thickness	The perpendicular distance between the two opposite surfaces of a complete tape
	Tie Coat	See Prime Coat
	Transfer	See Offsetting
	Transfer Tape	A tape having two pressure sensitive surfaces without the need for a carrier, which may or may not have reinforcing fibres in it and with a release liner separating the adhesive surfaces
	Transparent	The ability of a tape to allow the transmission of light.a tape is rated as transparent if 10 point type can be easily read when the tape is applied directly over it
	U
	Ultimate Adhesion	The maximum adhesion available from a pressure sensitive adhesive, determined from the force necessary to remove a strip of tape from a surface after an extended period of time
	Unplasticised Vinyl	A tough durable plastic film made from polyvinyl chloride without the addition of plasticiser
	Unwind Adhesion	The force required to remove the tape from the roll under prescribed conditions
	V
	Vinyl	An abused abbreviation applied indiscriminately to both PVC and UPVC
	W
	Water Absorption Rate ( WVTR )	The measure of the amount of water which will be soaked up by a tape under predefined conditions and be retained by it
	Water Vapour Transmission Rate ( WVTR )	The weight of water vapour passing through a defined area of tape under prescribed conditions of humidity temperature and time
	Wet Grab	See Tack