Adhesive Liner: Lining that melts and flows inside a sleeve filling any voids in between the substrate and the sleeve.
Aging: Change in the properties of a material over time and under specific conditions. Generally refers to the environmental stimulus such as heat and light.
ASTM (American Society for Testing and Materials): A nonprofit industry wide organization that formulates test methods and material specifications, and publishes standards, testing methods, recommended practices, definitions, and other materials.
Brittle Temperature: The temperature below which a material becomes brittle, often measured by a cold impact test.
Cold Blend: A test conducted by rapping tubing around a mandrel or by bending it in an arc while at a low temperature.
Conduit: A tubular raceway for holding wires or cables.
Continuity: A continuous path for the flow of current in. an electrical circuit.
Continuous Operating Temperature: Maximum temperature at which a component will maintain an acceptable lifetime performance, based on accelerated aging prediction.
Crosslinking: The formulation of bonds between molecular chains in a polymer by means of chemical canalization or electron bombardment. The properties of the resulting thermosetting material are usually improved.
Crosslinking by Irradiation: A method of crosslinking polymers that makes a nonflowing material. This generally improves the properties of the polymer.
CSA (Canadian Standards Association): An agency that has developed standard specifications for products with particular emphasis on safety in the end use.
Elastomer: A material that exhibits very low or zero crystallinity and a high degree of flexibility.
Elongation: The ultimate elongation, or elongation at rupture. Expressed as a percentage of the original strength
Encapsulation: Covering and sealing.
Environmentally Sealed: Description of a system to keep out moisture, dirt, air, or dust that might reduce performance.
Expanded ID: The specified minimum (as supplied) internal diameter of tubing.
Extrusion: A process that conveys plastic insulation material, generally via a screw, through forming dies and subsequently cools the insulation material to form a predetermined shape.
Flame Retardant: A descriptor applied to material that has been made or treated so as to resist burning.
Fluoropolymer: A polymer that contains atoms of fluorine.
Fluoroelastomer: Common trade name Viton®.
Heat-shrinkable: A polymeric material capable of being reduced in size when exposed to heat.
Insulated Terminal: A solderless terminal with an insulated sleeve over the barrel to prevent a short circuit in certain installations.
Irradiation: In insulations, the exposure of the material to high-energy emissions for the purpose of favorably altering the molecular structure via crosslinking.
Longitudinal Change ( Shrink Tubing): The change in length of tubing when recovered. Expressed in the percent change from the original length.
Lot Number: The number that identifies one production run of material.
Melting Point: The temperature at which crystallinity disappears when crystalline material is heated.
Mil: A unit equal to one one-thousandth of an inch (.001").
MIL-SPEC: Abbreviation for Military Specification, which is a now obsoleted document that the U.S. Government issues to define a product that will be used in military end-use applications. These documents have been replaced by SAE AMS specifications.
Operating Temperature: The maximum internal temperature at which a system, harness, or connector may operate in continuous service, generally expressed as a time and temperature.
Plating: The overlaying of a thin coating of metal on metallic components to improve conductivity, facilitate soldering, or preventing corrosion.
Polyamide: A polymer formed by the reaction of a diamine and a diacid. Nylons are commercial polyamides characterized by toughness, solvent resistance, and sharp melting point.
Polyolefin: A family of polymers (such as polyethylene and polypropylene) made from olefin monomers.
PVC: (Polyvinyl Chloride): A polymer compound used as wire insulation.
PVDF: Polyvinylidene fluoride.
Rated Voltage: The maximum voltage at which a component can operate for extended periods without undue degradation.
Recovered ID: In heat-shrink tubing the guaranteed maximum internal diameter of tubing after being freely recovered.
SAE International: SAE International is a global association of more than 128,000 engineers and related technical experts in the aerospace, automotive and commercial-vehicle industries. SAE International owns and defines the now obsolete Mil-Spec specifications.
Sealant: Soft, tacky, pliable material that seals where mechanical strength is not required.
Shelf Life: Generally, the length of time a product or material may be stored without deterioration. Specifically, the length of time during which shrink tubing will retain its expanded ID and return to its recovered ID.
Shore: A scale for comparing hardness. Higher shore values represent harder materials.
Shrink Ratio: An expression of how much the inside diameter of shrink tubing will reduce in size when recovered. The inverse of the expansion ratio.
Solvent Resistance: The ability of a material to retain physical and electrical properties after being immersed in specific solvents.
Specific Gravity: The ratio of the density (mass per unit volume) of a material to that of water.
Strain Relief: The technique for or act of removing or lessening the strain or stress on a joint, splice, or termination.
Tensile Strength: The pull stress (in force per unit area) required to break a given specimen.
Thermoplastic: A material that softens (melts or flows) when heated and becomes firm when cooled. A type of plastic that can be re-melted a number of times without any important changes in properties.
Tolerance: The total amount by which a quantity is allowed to vary from nominal; thus, the tolerance is half the algebraic difference between the maximum and minimum limits.
Ultraviolet Degradation: The degradation caused by long-time exposure of a material to sunlight or other ultraviolet radiation.
VW-1: A rating determined by the Underwriters' Laboratories (UL) optional Vertical Wire Flame Test - the most difficult flame test for tubing. Tubings with a VW-1 rating are highly flame-retardant.
Wicking: The longitudinal flow of a liquid in a wire or cable construction due to capillary action.