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Tape Glossary | S

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SATURATE: To incorporate materials into the backing for greater internal strength and resistance to various deleterious environments. The backing of paper tapes, for instance, may actually contain as much as 50% by weight of a rubber based impregnate.
SATURATOR: Equipment used to saturate tape backings with solutions for internal strength.
SHEAR CUTTER: A machine that slits tapes with rotating knives which duplicate a scissor action. A strong edge results, and tough, thick materials such as metal foil tape can be cut by this technique.
SHEAR STRENGTH: The resistance of a tape to slipping, or if its adhesive to internal splitting, when a load is applied along the plane of the tape.
SILASTIC: A family of silicone rubber polymers used as adhesives or coatings on cloth for high temperature products.
SILICONE RUBBER: Synthetic polymers with rubber-like properties based on organic silicone compounds that are resistant to degradation at very high temperatures and maintain good flexibility at low temperatures.
SIZING: The process of applying a solution to a web or yarn surface in order to fill pores or otherwise treat the surface to improve the handling or functional characteristics of the material.
SHELF LIFE: The useful life of a tape in storage.
SHRINKAGE: The loss of dimension of a tape when exposed to heat os some other environmental condition.
SLITTER: A machine used to cut wide-width (bundle) rolls of tape into individual rolls with a given length and a given width.
SLITTER KNIFE: A circular steel wheel, sharpened to a specified angle and radius, used on slitting machines to cut coated backings into rolls of predetermined size.
SLIVERING: Refers primarily to masking tape and occurs when the tape tears when being removed from a surface.
SOLVENT: In pressure-sensitive tape technology it is the liquid in which the various adhesive ingredients are dissolved to facilitate their application to a substrate. It is commonly organic in composition, e.g., toluene.
SOLVENT DISPERSION: A mixture in which the adhesive components in finely-divided from are suspended in a solvent as opposed to being dissolved.
SPIRALING: See "Pigtailing".
SPLICE: A point at which two separate lengths of tape are joined together.
SPLITTING: Refers to delamination of the tape layers, or the lengthwise rupture of the tape backing.
SNAP TEST: Describes a mode of testing. Whereas most testing requires conditioning prior to testing, a "snap test" would be a test taken without proper condition, that is to say, it is an immediate test.
SOLIDS: The percentage by weight of the non-volatile matter in an adhesive or another solution.
SOLUBILITY: The degree to which a tape or a component of the tape will dissolve in any specific solvent.
SOLUTIONS: Homogenous liquid mixtures, most often involving a solid material dissolved in a solvent.
SPECIFIC ADHESION: See "Adhesion".
SPECIFIC GRAVITY: The ratio of the weight of any volume of material compared to the weight of an equal volume of water.
SPECIFICATION: Refers to the set of instructions used to manufacture a tape and/or a set of requirements against which a tape is tested and measured.
SPLICE TABLE: An attachment on a machine used to facilitate splicing.
SPOKING: See "Roll Deformation".
SPOOLED TABLE: Tape wound spirally on a wide core in layers, permitting unusually-long lengths to be packaged in a continuous length.
SPOOLING: The process of winding Spooled Tape, much lie fishing line is wound on a reel.
STABILIZER: A chemical added to prolong the life of a material, such as stabilizer in a PVC film that resists the deteriorating effect of ultraviolet light
STAINING: The discoloration of a surface to which a tape has been applied-e.g., an appliance or automotive finish.
STAIN RESISTANCE: A tape's freedom from discoloring surfaces to which it is applied.
STIFFNESS: The bending resistance of a tape (the opposite of "Flexibility"). Low stiffness is one important factor determining the conformability of a tape.
STORAGE LIFE: See "Shelf Life".
STREAKS: Distortions in the adhesive coat, or other coatings, represented by lines, marks, or scrapes having a different color, shade, texture or absence of coating that is readily distinguished from the normal uniform appearance. Streaks generally occur in the machine direction.
STRESS RELAXATION: The treatment of a tape to remove stresses introduced in processing-e.g., heat treatment of vinyl plastic tape.
STRIKE THROUGH: A condition resulting when the application of a coating solution to one side of a web forces the solution through the web, thus partially depositing the coating on the reverse side.
STRINGINESS: A condition of the mass in which it feels very soft and mushy, and on close examination, relatively long legs or strings of mass can be pulled out of the mass.
SYRENE BUTADIENE: A synthetic rubber made from styrene and butadiene monomers (SBR). Used in adhesives and saturants.
SOLVENT RESISTANCE: The resistance of a tape backing or adhesive to dissolving in an organic solvent- particularly those found in paints, insulating varnishes, and cleaning solutions.
SUBSTRATE: The primary component of tape upon which the adhesive is applied. It may be any continuous material such as cloth, film, treated paper, metal foil, laminated materials, etc.
SLY-OFF: A family of silicone release coatings.

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