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Term |
Definition |
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Wet Winding
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A fiber reinforcement material is coated with a polymer compound as a liquid prior to wrapping on a mandrel in the filament wound manufacturing process.
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Wetting Agent
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Wetting is produced when this surface active agent decreases the cohesion within a liquid. For wetting to occur, the adhesive force between the two phases (solid and liquid) is greater than the cohesive force within the liquid.
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Whisker
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A single-crystal, short fiber.
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Window
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A defect in a thermoplastics film, sheet or moulding, caused by the incomplete plasticization of a piece of material during processing. It appears as a globule in an otherwise blended mass. See also Fish Eye.
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Wire Train
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The entire assembly which is utilized to produce a resin-coated wire which normally consists of an extruder, a crosshead and a die, cooling means, and feed and takeup spools for the wire.
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Wood Model
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A model of a container made from wood to assist in the design of a container.
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Working Life
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The period of time during which a liquid resin or adhesive, after mixing with catalyst, solvent, or other compounding ingredients, remains usable.
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Wrinkle
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An imperfection in reinforced plastics that has the appearance of a wave moulded into one or more plies of fabric or other reinforcing material.
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XLPE
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Crosslinked polyethylene
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Yield Value (Yield Strength)
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The lowest stress at which a material undergoes plastic deformation. Below this stress, the material is elastic; above it, viscous.
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Young's Modulus of Elasticity
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The modulus of elasticity in tension. The ratio of stress in a material subjected to deformation.
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Zyzzogeton
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Not a plastics term but the last word in the dictionary.
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What does that mean?!