Flexible Packaging Glossary - B
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- baggy, bagginess(a) In processing flexible packaging materials, slack areas in the web that should be flat. Usually caused by bands of unequal thickness (gauge bands) in the rollstock. (b) A roll in which the tension is not even across the width of the roll. A slack floppy area in the web is caused by the material being stretched and permanently elongated in the tighter areas. Rolls of film or laminate where one side of the material coming off the roll is loose or baggy while the opposite edge is tight is said to have a baggy edge.
- Bar codeA machine-readable symbol.
- BarexA trade name for acrylonitrile plastic.
- BarrierThe ability to stop or retard the movement of one substance through another. In packaging, the term is most commonly used to describe the ability of a material to stop or retard the passage of atmospheric gases, water vapour, and volatile flavour and aroma ingredients.
- Barrier MaterialA flexible packaging material possessing properties that limit the transmission of various gases through the material. ( used to keep products dry, wet or extend shelf life and assure product freshness)
- Barrier PackagingThe utilization of engineered materials that possess properties capable of preventing the permeation of harmful substances through material, which would result in product damage.
- base filmThe original form in which a film exists before coating or laminating.
- Biaxial OrientationOrientation of plastic films in both machine and cross machine directions by stretching. Biaxially stretched films are generally well balanced in both directions and much stronger in terms of tear strength.
- bleedImage or color that extends beyond the trim edge of the finished printed piece.
- Blister PackagingA type of packaging in which the item is secured between a preformed (usually transparent plastic) dome or "bubble" and another surface or "carrier". Attachment may be by stapling, heat-sealing, gluing, or other means.
- Blown FilmsPlastic films produced from synthetic resins (such as polyethylene) by the blown process. In this process, the molten resin is extruded through a circular die into a tube. This tube is expanded ("blown") by internal air pressure into a larger bubble with a much reduced wall thickness and cooled with external air quenching.
- blown-film ExtrusionThe manufacture of thin plastic films by extruding a bubble of plastic and then inflating the bubble. In film manufacturing the extrusion and inflation are a continuous process.
- BONBiaxially oriented nylon film, with excellent oxygen and aroma barrier properties, (see Nylon), but it is a poor water vapor barrier. BON is much stiffer than cast nylon film, but cannot be thermoformed.
- Burst StrengthA measure of the ability of a sheet to resist rupture when pressure is applied to one of its sides by a specified instrument under specified conditions.
- butt(a) To join with overlap or space between. (b) Butt register is where two or more colors meet with no significant overlap or space between.