| TACKIFIER:
A resin or softening material added to an adhesive to give tack.
TEAR STRENGTH:
(Tear Resistance)
Tapes ability to withstand tearing forces. Edge tear strength,
or starting tear strength, refers to the force required to start
a tear at an un nicked or virgin edge or a notched edge. Tear
propagation resistance refers to a continuation of a tear, which
has been started by cutting or nicking the edge. Cross tear and
machine direction rear refer to strength measured with the tear
line running across the width and the lengthways of the tape respectively.
TENSILE STRENGTH:
The maximum longitudinal
tension force that can be withstood by a material of standard
dimensions without breaking. For pressure-sensitive tapes or other
thin products it is usually expressed as force per unit width
(pounds per inch) As a basic property of a material, it is expressed
as force per unit cross-sectional area (pounds per square inch).
Dry
Tensile: Paper tape strength after it has been conditioned
at specific humidity for a specified length of time.
Wet Tensile: Paper strength that measures that ability
of tape to function when exposed to moisture.
Longitudinal Tensile Strength: Measured parallel to the
length of the tape.
Cross-Direction (or Transverse) Tensile Strength: Measured
at right angles to the length of the tape.
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TENSIOMETER:
Instrument used for
measuring tension of film tape substrates.
THERMAL CONDUCTIVITY:
Measurement of the
relative tapes ability or other material to conduct heat. Rates
at which the heat is transferred depend on the thermal conductivity,
also the thickness, area and temperature difference.
THERMAL ENDURANCE:
Time that a tape will
last at an elevated temperature before deterioration occurs and
tape becomes unusable.
THERMAL EXPANSION:
Increase in dimension
that occurs when the temperature of a material is increased.
THERMOPLASTIC:
Referring to a material
that will soften when heated and harden on cooling, repeatedly.
Normal pressure sensitive adhesives are thermoplastic.
THERMOSETTING:
A term applied to
plastic materials that change chemically at high temperatures
to a harder, less plastic or elastic form.
THREAD LAY DOWN:
Pattern of threads
in a reinforced tape.
3-D MIXER:
A high-speed, high
shear mixer used to put adhesive ingredients into a solution.
TOLERANCE:
Variability of limits
that are allowed around a standard test value. Expressed as a
+ or -.
TOLUENE:
Strong aromatic hydrocarbon
solvent widely used in the adhesive industry.
TRANSFER:
Normally referring
to mass transfer, but sometimes said of any tape component that
moves from its proper place to some other position during either
unwind or removal.
TRANSFER TAPE:
A double sided tape
consisting of a film of adhesive without a carrier, but with a
lining or facing material.
TRANSLUCENT:
Partially transparent.
Translucent tape allows some light to pass through its backing.
TRANSPARENT:
Tapes capability of
transmitting light without diffusion. A tape is rated as transparent
if 10-point type can be easily read.
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