a

Abrasion Resistance

The ability of a material to resist surface wear.

Accelerated Aging

Accelerated aging is testing that uses aggravated conditions to speed up the normal aging process of items. It is used to help determine the long term effects of expected stress levels in a shorter time.

Acrylic

A transparent polymer that is tough and flexible. Acrylic adhesives set rapidly and are very strong due to heavy cross-linking.

Adhesion

A bond established upon contact between two surfaces.

Adhesion Build-up

An increase in the peel adhesion value of a pressure-sensitive adhesive tape, after it has been allowed to dwell on the applied surface. Result of the adhesive “”wetting out”” on the substrates.

Adhesive Residue

The adhesive remaining on a substrate when a self-adhesive material is removed from the substrate.

Atraumatic Removal

Not producing injury or damage when removed from the skin.

b

Biocompatibility

Not harmful of living tissue

Bond

To be joined securely to something else.

c

Caliper

An instrument for measuring external or internal dimensions, having two hinged legs resembling a pair of compasses and in-turned or out-turned points.

Carrier

The material to which two adhesives are applied in a double-coated construction.

Clean Release

When adhesive can be removed from a substrate without leaving residue.

Compression Set

The permanent deformation remaining when a force that was applied to it is removed.

Continuous Use Temp

The temperature range at which a material can function for an extended period of time without failing.

Converters

Companies that specialize in combining thin and flexible materials to create new products.

d

Die-Cut

The process of using a die to cut shapes of low-strength materials.

Differential Adhesive

A double-sided tape where different adhesive and coating thicknesses are coated on each side.

Dimensional Stability

Ability of a substance or part to retain its shape when subjected to varying degrees of temperature, moisture, pressure, or other stress.

Double-Coated

Describing a material where adhesive is coated onto both sides of a carrier material.

Durometer

One of several measures of the hardness of a material.

e

Elongation

The amount of extension of an object under stress, usually expressed as a percentage of the original length.

f

Fabric – woven and nonwoven

Woven – A textile formed by weaving or knitting textile fibers. Non-woven – Sheet or web structures bonded together by entangling fiber or filaments mechanically, thermally or chemically.

Film

Materials in the form of a thin flexible sheet.

Foam

A substance that is formed by trapping many gaseous bubbles in a liquid or solid.

h

High-Tack

Describing an adhesive with an initial aggressive bond when applied to a substrate.

Hydrogel

An adhesive or coating which contains a high amount of water. Hydrogels can be used for their ability to absorb additional water or wound exudate to control the moisture in the wound bed to aid in healing.

l

Lamination

The technique of manufacturing a material in multiple layers.

Liner

A substrate that acts as the carrier of the adhesive.

Low Surface Energy

The tendency of a surface to repel, rather than attract an adhesive.

Low-Tack

Describing an adhesive with an initial non-aggressive bond when applied to a substrate.

m

Mesh

A material made of a network of wire or thread

p

Pattern Coating

A specialized coating technique where the adhesive or coating is selectively applied to a continuous backing or film.

Peel Strength

A material’s ability to resist forces that pull it apart by separating a flexible surface from a rigid surface.

Perforation

The physical removal of material from an adhesive or elastomeric material in order to provide a free path for the movement of air or liquid.

Pressure Sensitive Adhesive

An adhesive that forms a bond when pressure is applied. Pressure is critical to the proper functioning of the PSA.

r

Release Liner

A component of the pressure-sensitive adhesive laminate that readily separates from the adhesive.

Repositionable

Describing an adhesive that allows for removal and reapplication

Roll Slitting

An operation that cuts a large roll of material into narrower rolls.

s

Shear Strength

A material’s ability to resist forces that can cause the internal structure of the material to slide against itself.

Silicone Gel

3-D matrix formed by a silicone polymer with adhesive characteristics. Silicone gels act as adhesives which form atraumatic fixation and removal from skin and other materials.

Single – Coated

Describing a material with a backing and an adhesive laminated to one side of the backing.

Substrate

The surface to which adhesive is applied.

u

Unsupported Adhesive

A coating of adhesive on a release liner with no carrier film.

UV Based Curing

Ultra Violet curing is a photochemical process in which high-intensity ultraviolet light is used to instantly cure or dry inks, coatings or adhesives.

v

Viscocity

The measure of a fluid’s resistance to flow.

w

Web Coating

The application of a thin functional material to a substrate, such as paper, fabric, film, foil or sheet stock, as it is wound through the coater. The substrate starts and ends the process on a roll.

z

Zone Coating

Adhesive is applied only to a controlled area of the web.