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Packaging - Glossary - V

  • Packaging Processes

      A B C D E F G H I J K L M N O P Q R S T U V W X Y Z  

    The Glossary of the International Trade Centre (ITC) on the technical terms used in the packaging sector is a database designed to provide updated information on the specific terminology used in the packaging industry. This Glossary is a tool placed at the disposal of users for information only. It is not designed to replace the appropriate professional advice in any way. Users are invited to submit their comments and observations by email to Mr. Frederic Couty, Senior Adviser, Export Packaging at the following email address: fcouty[at]intracen.org

    Select an alphabetic above to access the glossary.

  • V

    Vacuum Closure

    Any closure equipped with a liner capable of holding a vacuum.

    Vacuum deposition

    See: Metallizing.

    Vacuum filling

    Filling of liquids into containers by means of evacuating most of the air and allowing the liquid to replace it. Used in particular to prevent foaming or spilling, during high speed filling.

    Vacuum forming

    See: Thermoforming.

    Vacuum packaging

    Packaging in containers from which virtually all the air has been removed prior to final sealing. Often used to achieve a low oxygen level in the package, and therefore in the product, as this is normally the major factor determining shelf life of foodstuffs. The container must provide a sufficient gas barrier to preserve the vacuum.

    Valve

    A container closing device which regulates the flow of mate­rial through an opening. Generally used on containers of gas or liquid packed under pressure, but also on multiwall paper sacks.

    Vapour phase inhibitor

    (1) Chemical applied to paper or plastic packaging materials to absorb humidity inside a package (2) material that sublimes and deposits a thin protective film on metal sur­faces, thereby inhibiting or retarding rust for­mation.

    Vapour transmission rate (VTR)

    The rate of passage of vapour (usual­ly water vapour) through a material. The vapour permeability of of a packaging material is defined by its VTR.

    Varnish

    A liquid preparation which, when spread onto a surface, dries to form a hard glossy coating. Used both to protect another coating or printing and to enhance the appearance of the surface. See also: Lacquer.

    Vegetable parchment

    See: Parchment.

    Vehicle

    Resinous liquid component  of a printing ink that carries and  binds the pigment particles together and adheres them to the substrate.

    Vial

    A small, normally bottle-shaped, container, made of glass or plastic, with a neck finish designed to accommodate some type of stopper. Used almost exclusively for the packaging of pharmaceutical liquids and powders.

    Vibration test

    A specific test to determine the ability of a container to protect its contents from vibration, at varying amplitudes and frequencies. See also: Shock test.

    Vinyl

    A generic term for any of the vinyl plastics or for products made from them e.g. polyvinyl chloride.

    Vinylidene

    Chloride plastics. Plastics based on resins made by the polymerization of vinylidene chloride or copolymerization of vinylidene chloride. Main packaging uses are as barrier layers or coatings on other flexible substrates such as cellophane and paper. The films are flexible, transparent, have excellent cling properties and low permeability to water vapour and gases.

    Virgin material

    A raw material obtained directly from the basic conversion or manufacturing process which has not been subjected to use or processing other than that required for its original production and which contains no recycled materials.

    Viscose

    A viscous solution made by treating cellulose (pulp from wood or cotton) with caustic alkali solution and then with carbon disulphide. Viscose is the basic material used for cellophane film, and for one type of shrink-on bottle closure seals.

    Viscosity

    The property of a material which governs its resistance to flow. Water has a relatively low viscosity, oil a higher viscosity.

    Volumetric filling

    A filling method in which a measured volume of product is put into a package, rather than a determined weight.

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