Worth knowing
Glossary
Our glossary
Glossary of technical termsIn this area you will find definitions of technical terms.
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A |
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| Abrasion Resistance | The ability of a tape to withstand rubbing and friction and still function satisfactorily. |
| Accelerated 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 |
| Acetates | 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 | Lake Pressure Sensitive Adhesive |
| Adhesive Residue | Lake 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 |
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B | To the top |
| Backing | The flexible supporting film, fabric, foil, or paper to which a pressure sensitive adhesive is applied |
| Bleeding | Lake 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 | Lake Breaking Load |
| Bursting Strength | The ability of a tape to resist damage when force is applied perpendicularly to the surface of the tape |
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C | To the top |
| Caliper | Lake 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 | Lake Acetates |
| 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 | Ace Cohesion |
| Color | Usually describes the color of a tape when looking at the backing, regardless of the color 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 irregularly 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 | Lake Cross-linking |
| Curling | The tendency of a tape to curl back on itself when unwound and allowed to hang from the roll |
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D | To the top |
| 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 | Lake Telescoping |
| Double Coated | A tape which has two available pressure sensitive adhesive coated surfaces |
| Double Faced | Lake Double Coated |
| Double Sided | Lake Double Coated |
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E | To the top |
| Easy Unwind Treatment | Lake 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 |
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F | To the top |
| Filaments | Thin longitudinal threads of glass, polyester, nylon or other high strength materials |
| Movie | 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 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 |
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G | To the top |
| Gapping | Opening between layers of tape in a roll |
| Gauge | Lake 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 |
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H | To the top |
| 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 meters 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 |
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I | To the top |
| 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 | Ace Cohesion |
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K | To the top |
| Key | The bond between the adhesive and the carrier or backing |
| Key Coat | Lake Prime Coat |
| Key Failure | Failure of an adhesive bond such that separation is at the interface of adhesive and carrier or backing |
| Power | A sulphate wood pulp paper |
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L | To the top |
| 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 |
| Laminates, 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 |
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M | To the top |
| Metal Foil | Thin flexible sheets of metal such as aluminum 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 |
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O | To the top |
| 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 |
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P | To the top |
| 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 vapor. The minute holes may be in the backing and/or the adhesive |
| Plasticized polyvinyl chloride | A tough durable plastic film having excellent resistance to oils, chemicals and many solvents. It can also be colored. 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 |
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Q | To the top |
| Quick Stick | Lake Tack |
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R | To the top |
| 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 | Lake Storage Stability |
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S | To the top |
| Shear Adhesion | Lake Holding Power |
| Shock Resistance | Lake 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 | Lake 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 |
| Substrates | The surface to which a pressure sensitive tape is applied |
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T | To the top |
| 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 becoming 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 | Lake Prime Coat |
| Transfer | Lake 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 |
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U | To the top |
| 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 |
| Unplasticized Vinyl | A tough durable plastic film made from polyvinyl chloride without the addition of plasticizer |
| Unwind Adhesion | The force required to remove the tape from the roll under prescribed conditions |
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V | To the top |
| Vinyl | An abused abbreviation applied indiscriminately to both PVC and UPVC |
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W | To the top |
| 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 vapor passing through a defined area of tape under prescribed conditions of humidity temperature and time |
| Wet grave | Lake Tack |
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