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Tape Glossary | R

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RAZOR BLADE SLITTER: A slitting machine that slices the tape backing with razor blades. This imparts a very smooth, and therefore strong, edge that is difficult to tear by hand. Film tapes are often slit by this method.
RELATIVE HUMIDITY: The amount of moisture present in the atmosphere as a percentage of the maximum quantity of moisture that the air can hold at that temperature.
REINFORCE: A material, such as glass yarn, laminated to a tape backing to provide additional tensile strength and tear resistance.
RELEASE COATING: Release Coating and Backsize are sometimes used interchangeably. The term Release Coating usually refers to a very thin coating which is applied to the backside of a film or other impervious tape backing and which allows the tape to be unwound at a controlled level.
RELEASE LINER: A backing coated on one or both sides with a controlled amount of release agent. It is frequently used with label stocks or double-face tapes.
RESIN: A material, usually a polymer, which imparts tackiness and pressure-sensitive adhesion to a rubber/resin adhesive.
RESISTIVITY: The specific resistance of a material. The electrical resistance offered by a section of material of standard dimensions.
REVERSE ROLL COATER: The most adaptable web coating method; capable of coating a variety of flexible substrates with a wide range of adhesive and solutions.
REWIND MACHINE: A unit or units which rewind sub-standard individual rolls of finished tape and salvage good portions, making usable and salable rolls.
REWOUND: Refers to a roll of tape that has been enrolled to remove defects.
ROLL DEFORMATION: This is a general term to describe any physical departure from the shape and proportions of a perfect roll of tape, i.e. differences in diameter, openings between layers in the roll and displacement of layers axially with relation to each other.
Note examples defined below:

  • Buckling: That type or Roll Deformation wherein bumps appear along the circumference of the roll.
  • Fluting: A term sometimes used to indicate "Gearing" or "Smoking".
  • Gearing: That type of Roll Deformation wherein a regular succession of humps appears along the circumference of the roll. The regularity of the spacing from hump to hump gives the appearance of a gear.
  • Roll Opening: (Also called Gapping) That type of Roll Deformation wherein any two layers become separated from each other so as to create an opening.
  • Spoking: That type of Roll Deformation which results in the appearance of lines radiating from the center of a roll to the circumference. Its resemblance to a spoked wheel is marked.
    Telescoping: That type of Roll Deformation wherein successive layers of tape slide across each other in the same axial direction. The movement is similar to the lengthening of a telescope.

ROLL HARDNESS: A value which reflects proper winding of individual rolls of tape. The value is measured by an instrument which measures the relative hardness of wind.
ROPE PAPER: A paper formerly composed of reclaimed rope fibers. The decreasing used of hemp rope has created a shortage of used rope, and virgin hemp fiber is being used.
RUBBER: A long chain polymer, synthetic or natural, that has the properties of elasticity, resilience, and recovery.

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