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Term |
Definition |
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I Dimension
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A specified minimum diameter inside the bottle neck. A minimum diameter is specified to allow sufficient clearance for filling tubes to enter the bottle neck easily.
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ID
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An abbreviation for Inside Diameter.
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IM
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Injection molding
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IMM
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Injection molding machine
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Immiscible
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Descriptive of two or more fluids which are not mutually soluble.
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Impact Bar (Specimen)
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A test specimen of specified dimensions which is utilized to determine the relative resistance of a plastic to fracture by shock.
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Impact Modifiers
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Are additive used to enhance the material's ability to withstand the force of impact.
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Impact Resistance
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Relative susceptibility of plastics to fracture by shock, eg, as indicated by the energy expended by a standard pendulum type impact machine in breaking a standard specimen in one blow.
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Impact Strength
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(1) The ability of a material to withstand shock loading. (2) The work done in fracturing, under shock loading, a specified test specimen in a specified manner.
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Impregnation
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The process of thoroughly soaking a material such as wood, paper or fabric, with a synthetic resin so that the resin gets within the body of the material. The process is usually carried out in an impregnator.
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Impulse Sealing
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A heat sealing technique in which a pulse of intense thermal energy is applied to the sealing area for a very short time, followed immediately by cooling. It is usually accomplished by using an RF heated metal bar which is cored for water cooling or is of such a mass that it will cool rapidly at ambient temperatures.
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In Situ Foaming
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The technique of depositing a foamable plastics (prior to foaming) into the place where it is intended that foaming shall take place. An example is the placing of foamable plastics into cavity brickwork to provide insulation. After being positioned, the liquid mix foams to fill the cavity. See also Foamed Plastics.
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Infra-Red
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Part of the electromagnetic spectrum between the visible light range and the radar range. Radiant heat is in this range, and infra-red heaters are much used in sheet thermoforming.
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Inhibitor
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A substance that slows down chemical reaction. Inhibitors are sometimes used in certain types of monomers and resins to prolong storage life.
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Injection Blow Molding
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See 'Injection Blow Moulding'
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Injection Blow Moulding
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A blow moulding process in which the parison to be blown is formed by injection moulding.
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Injection Molding
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The process of forming a material by forcing it from a heated cylinder, under pressure, through a sprue into a cavity of a confined mold.
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Injection Molding Pressure
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The pressure applied to the cross-sectional area of the molding cylinder.
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Injection Mould
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A mould into which a plasticated material is introduced from an exterior heating cylinder.
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Injection Moulding
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A moulding procedure whereby a heat-softened plastic material is forced from a cylinder into a relatively cool cavity which gives the article the desired shape.
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