Acrylic A synthetic polymer with excellent aging characteristics that can be used as either a single component adhesive or a coating or saturant, depending upon composition.
Adhesion A bond produced between a pressure sensitive adhesive and a surface.
Adhesive Any material that will usefully hold two or more objects together solely by intimate surface contact.Adhesive transfer The transfer of adhesive from its normal position on the tape to the surface to which the tape was attached, either during unwind or removal.
Backscoring (Crack & Peel) Cutting the bottom release liner in such a way as to aid in the dispensing or applying of the product.
Baloney (Cevi, Lathe or Lever) Slitting This process utilized standard length log rolls, cutting through both tape and core roll after roll. This method allows for quicker change-over to different tapes and enables the converter to produce smaller quantities of a certain size than rewind slitting.
Bi-Directional Related to strapping tapes, in which the reinforcing material consists of filaments in both the length and the cross directions, usually a woven cloth.Bleeding Penetration through the tape of a coloring liquid (paint, etc.) onto the surface to which the tape is applied.
Coating Weight The weight of a coating per unit area.
Cohesion (cohesive strength, internal bond) The ability of the adhesive to resist splitting. Good cohesion is necessary for clean removal.
Converter (Fabricator) One who modified products to enhance their value and final usage. Products can be modified primarily by: laminating, die-cutting to custom shape, precision slitting, adding/removing liners & cutting pieces to length.
CoronaTreatment A process that alters the surface of a material or its surface energy by exposing that material to a high voltage electrical discharge treatment. Typically used to raise the surface energy of films such as polyethylene or polypropylene to obtain better adhesion of inks, adhesive and other coatings. High energy surfaces permit better wet-out (contact) of the coating than low energy surfaces.
Creep A slow movement of the adhesive or backing under stress.
Creped Paper that has small folds in it, giving it high stretch.
Cross-Linked (Cured) The development of a three-dimensional structure in an adhesive, which is activated normally by heat. An improvement in shear resistance, high temperature resistance, and oil or solvent resistance will normally result.Cupping A slight U-shaped deformation of the tape (at right angles to the length) which usually appears after unwind tension is relaxed.
Die-cutting Process by which any shape, pattern or design can be cut out of various pressure-sensitive tapes, utilizing customer-made dies.Double CoatedTape A pressuresensitive tape consisting of a carrier with adhesive coated on both sides. Typically, a liner is necessary to unwind the roll.
Elastomer An elastic, polymeric substance, such as a natural or synthetic rubber.Elongation The amount a tape is able to stretch without breaking, expressed in a percentage.
Filaments Longitudinal threads of glass, polyester, nylon or other high-strength materials.
Film Uniform, homogeneous, nonfibrous synthetic webs.
Flagged Rolls Used to identify a bad spot in the roll for internal processing (or possibly a splice).
Flagging A peeling away from the surface of the end of a length of tape, particularly in a spiral-wrap application.
Flame Resistance The ability of a tape to withstand exposure to flame. Fireproof materials will not burn even when exposed to flame. Flame-resistant (fire-retardant, self-extinguishing) materials will burn when exposed to flame but will not continue to burn after the flame is removed.
Flatback Smooth paper backing.
Fluorocarbon Films A film with very high and low temperature limits, excellent electrical characteristics and very slippery, non-sticking surface. One example is DuPonts Teflon (polytetrafluoroethylene).Fluting Distortion of a roll of tape such that layers no longer form a circle.
Laminating Joining of several layers of varying materials utilizing pressure-sensitive tapes.Lifting A situation where a section of tape has pulled away form the surface to which it have been applied.
Metal Foil Thin, flexible sheets of metal, such as aluminum and lead, used as tape backings because of inherent properties such as weather resistance, reflectivity, etc.Migration The movement, over a long periods 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 surface to which it is applied. Some plastic films and foams contain plasticizers which are apt to migrate into the tape adhesive, causing the adhesive to soften.
Offsetting Occurs when a printed tape is unwound and some of the printing ink is picked off by the adhesive or migrates into the adhesive. It is, in effect, a delamination of the ink.
Oozing A squeezing out of the adhesive from under the backing. It is occurs when the tape is in roll form, the edges of the roll become tacky.
Out-Gassing The release of volatile components under heat or vacuum.Over-run A quantity of material in excess of the amount ordered. Trade practices permit +/- 10% tolerance for customer over-runs and under-runs.
Peaking Large singular upheavals in the outer layers of a roll of tape.
Peel/Adhesion Test The measurement of the adhesive or bond strength between two materials, expressed in ounces/inch.
Plain cloth Fabric woven from cotton, glass, or other fibers without further treatment.
Polyethylene (PE) A tough, stretchy film having very good low-temperature characteristics.
Polyester A strong film having good resistance to moisture, solvents, oils, caustics, and many other chemicals. It is usually transparent.
Polypropylene(PP) A cousin of polyethylene, with generally similar properties, but stronger and having a higher temperature resistance.
Polyurethane Foam Closed cell foam with adhesive on two sides, used in permanent bonding applications, to replace mechanical fasteners, epoxies and screws.
Perforating Hole-punching the release liner, usually between kiss-cut parts.
Pressure Sensitive A term commonly used to designate a distinct category of adhesive tapes and adhesives, which, in dry (solvent-free) form, are aggressively and permanently tacky at room temperature and firmly adhere to a variety of dissimilar surfaces upon mere contact without the need of more than finger or hand pressure. They require no activation by water, solvent, or heat to exert a strong adhesive holding force toward such material as paper, plastic, glass, wood, cement, and metals. They have a sufficiently cohesive holding an elastic nature so that, despite their aggressive tackiness, they can be handled with the fingers and removed from smooth surfaces without leaving a residue.
Pressure Sensitive Tape A combination of a pressure sensitive adhesive and a backing.
Primer A primer is used to increase the bond of the adhesive to the backing. The use of a primer assists in keeping the adhesive on the backing when a tape is removed.Printability The ability of a tape to accept and hold a printed legend and especially to resist offset of the printing when rewound into a roll after printing.
Release Coating (easy unwind treatment) A coating applied to the backing on the side opposite the adhesive that provides ease of unwind and prevents delaminating or tearing. Without a release coating, the tape would adhere to its own back and would not unwind.
Release Coat Transfer (Silicone Transfer) Particles of the release coat stick to the adhesive on unwind; the resulting tape will have little or no ability to stick.
Release Liner Siliconized paper or film coated on one or both sides that protects the adhesive until use. The liner is removed and discarded before application. Most frequently found on double-coated tapes and labels. Fluorosilicone liners are available in special situations that required silicone adhesive to release.Rewind Slitting Preferred method for slitting large volumes of standard sized rolls of pressure-sensitive tape. In this process, large master rolls of jumbos are used to unwind tape and then are rewound layer over layer across a set of pre-spaced cores.
Self-Wound Roll A roll of tape in which each layer of tape is directly on top of the last one. The roll contains no liner.
Silicone A unique polymer system that can be a very effective release coating, or pressure sensitive adhesive capable of functioning effectively at extreme temperatures.
Silicone Adhesive Adhesive system designed for sticking to silicone surfaces. (i.e.: splicing liners).
Single Coated Tape A pressure-sensitive tape consisting of a carrier with adhesive coated only on one side.
Slip Sheet or Interliner A treated sheet used to cover the adhesive to facilitate handling.
Splice A point at which two separate lengths of tape are joined together.Spool (Traverse) WoundRolls One layer of tape starts on a side of the core. The next layer overlaps with the first one and then the tape is wound back and forth traversing from one side of the core to the other. This process allows for much longer rolls (up to 33,000yds depending on the width and thickness of product) thus reducing the downtime involved with constant roll changes.
Tearing Breaking or slivering of a tape during unwind.
Tear Resistance The ability of a tape to resist tearing after a tear have been started by cutting or nicking of the edge.
Telescoping A sideways sliding of the tape layers, one over the other, such that the roll looks like a funnel or a telescope.
Tensile Strength(brake strength) The force required to break a piece of tape by pulling on opposite ends of the piece.
Thickness Distance from one surface of a tape, backing or adhesive to the other, usually expressed in mils or thousandths of an inch. This is usually measured under slight pressure with a special gauge.
Tolerance Maximum allowable variation from agreed-upon or specified dimensions throughout the manufacturing or converting process.
Transfer Tape An unsupported pressure-sensitive adhesive tape. Transfer tapes generally consist of an adhesive and a coated release liner.
Unplasticized Vinyl (UPVC) A tough durable plastic film, similar to Plasticized PVC, but lacking the elongation numbers found in PVC due to the lack of plasticizers.Unwind or Unwind Adhesion (unrolling) The force required to remove tape from the roll.
Vinyl Nitrile Sponge Rubber Closed cell, single coated adhesive foam that offers good oil resistance and shock absorbency.
Void A bare uncoated area on either the adhesive or release-coated side of the tape.