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Glossary
Glossary of Silicone Terms
The Glossary of Silicone Terms is an excerpt from The Silicone Elastomer Handbook
Written By: David Brassard
Edited By: Mr. David Crossan, Sr. Editor
Types of plastic
Types of plastic
Large chainlike molecules are created by hooking together short-chain molecules. The precise process used to create this change, however, results in different types of plastics. There are principally two types of plastic, one is Thermoplastic and second one is Thermosetting Plastic.
Adhesive Terminology – Z
Z (Impedance) – Variable for Electrical Impedance (The opposition a circuit offers to the flow of alternating current) expressed in ohms
Adhesive Terminology – Y
Yield – The percent of usable, defect-free lumber that can be cut from a rough cutting, board, or bundle of lumber.
Yield value – The stress (either normal or shear) at which a marked increase in deformation occurs without an increase in load.
Adhesive Terminology – X
X (Reactance) – Variable for Electrical Reactance (Opposition to the flow of alternating current).
Adhesive Terminology – W
Warp – A significant variation from the original, true, or plane surface.
Watt – A unit of electric power. The product of a volt times an ampere.
Webbing – Filaments or threads that may form when adhesive transfer surfaces are separated.
Wood failure – The rupturing of wood fibers in strength tests on bonded specimens, usually expressed as the percentage of the total area involved which shows such failure.
Wood Welder – Small hand-held radio frequency unit generally used for assembly gluing.
Wood, built-up laminated – An assembly made by joining layers of lumber with mechanical fastenings so that the grain of all laminations is essentially parallel.
Working life – The period of time during which an adhesive, after mixing with catalyst, solvent, or other compounding ingredients, remains suitable for use.
Adhesive Terminology – V
V-joint – A glue joint in which one side is thicker than the other as a result of poor machining or uneven application of pressure.
Vacuum Press – A press designed for laminating or veneering in which the panel is placed inside of a flexible bag connected to a vacuum pump.
Vapor Density – The weight of a vapor or gas compared to the weight of an equal volume of air.
Vapor Pressure – The pressure exerted by a saturated vapor above its own liquid in a closed container.
Vehicle – The liquid component of a material.
Veneer – A thin (usually less that 1/8" thick) piece of wood.
Adhesive Terminology – U
Ultimate elongation – Elongation at failure.
Ultraviolet light – Part of the light spectrum. Ultraviolet rays can cause chemical changes in rubbery materials.
Urethane – A family of polymers ranging from rubbery to brittle. Usually formed by the reaction of a di-isocynate with a hydroxyl.
UV – Ultraviolet Light.
