Zone of invisible radiations beyond the violet end of the spectrum of visible radiations. Since UV radiation is a shorter wavelength than visible, it is of higher energy that is sufficient enough to initiate the chemical reactions that degrade most plastics.
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The four-digit number assigned by the United Nations Committee of Experts on the transport of dangerous goods. These numbers identify a particular group of substances.
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A general defect. Thin and thick areas, especially in the side walls of the ware.
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A package which contains one discrete dosage form, i.e., one tablet, one capsule, one 2 ml quantity of liquid, etc. A unit package consists of the unit quantity, protective wrapping, cushioning, and identification marking, up to but not including the shipping container. Single dose unit packaging is used for foods, drugs, cosmetics, medical devices and some industrial products.
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A simple mold which comprises only a single cavity without further mold devices, and is used for the production of sample containers.
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A load in which all the containers or articles which may consist of two or more units combined by interlacing or, more commonly, bound together by means of tension strapping, plastic shrink or stretch films.
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Mold action in the manufacture of closures. After the injection cycle is completed, the mold cavity is removed. The core then begins to rotate, literally unscrewing the core from the closure, as a stripper sleeve moves forward to eject the closure.
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Universal product code. A 10 digit, all numeric code which uniquely identifies a product. The first 5 digits, called the manufacturer identification number, identify each manufacturer or organization controlling the label of the product. The second 5 digits, called the item code, identify individual items within the companies and are assigned by the manufacturer or organization controlling the label of the product.
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Generic name for urea-formaldehyde. A thermosetting compound used to fabricate light colored plastic closures as opposed to phenol which is for dark closures.
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Any chemical compound which, when mixed with a thermoplastic resin, selectively absorbs UV rays and minimizes chemical and/or physical changes that may be engendered by UV.
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