MenĂŒ

Glossar

Glossary of technical terms

In this area you find definitions of technical terms.
Search by using the chars.

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 Quick Stick See Tack

R
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 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
 
Nach oben
 Vinyl An abused abbreviation applied indiscriminately to both PVC and UPVC

W
 
Nach oben
 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