ABRASION
RESISTANCE:
The ability of a tape to withstand rubbing and friction without
disintegrating.
ACETATE
FILM:
Produced by chemically treated cellulose, this transparent film
provides moisture resistance and ageing characteristics of a superior
quality.
ACRYLIC ADHESIVE:
An adhesive, which is pressure-sensitive, formed by the polymerization
of acrylic ester monomers. Exhibiting clarity, ageing and weathering
characteristics.
ADHESION:
A measure of the ability of a pressure-sensitive to adhere, under
specific conditions of application and removal, to a surface. Expressed
in the amount of force, in ounces per inch width, required to remove
a piece of tape from a polished steel surface by pulling it back
on itself at a 180 degree angle at the rate of 12inches per minute.
To determine the sticking qualities of a tape, adhesion is one of
the factors others are:
Feel:
By touching the adhesive with ones fingers determines
the degree of stickiness, however, this is often a misleading
test of adhesion..
Finger-stick: See - Feel.
Hold: Referring to the ability of the tapes adhesion qualities
for long periods of time, whilst under specified amounts
of stress. By applying a small area of tape to a specific
surface and hanging a weight to the free end of the tape
hold is then measured. Hold values are stated as hours
and minutes transpiring between application and failure.
Sometimes tested at 0 degree pull-off and sometimes 20
or 90 degree pull-off. These values are particularly important
when constant stress on the tape is of significance.
Peel: At a specified angle and speed, the force required
to pull a strip of tape from a surface. Usually expressed
in ounces per inch width, and measured under specified
standard conditions..
Quick-Stick: The ability to adhere, after a very brief
contact at a very low pressure, to a specified surface.
Shear Adhesion: When stressed at a 0 degree angle, the
strength of a bonding tape.
Specific Adhesion: Ration of adhesion to a particular
surface compared with any other surface as a standard.
Tack: Referring to the sticky feel of the adhesive. Expressed
as a ratio of height of drop of ball to distance traveled
in a horizontal guided track. Can also be measured by
rolling ball method.
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ADHESION TO BACKING:
The force required to remove a tape (in the same manner as peel
adhesion) from its own back to which it has been re-applied with
a definite pressure after removal from roll.
ADHESION TO STEEL
TEST:
The force required to remove pressure-sensitive taped from a steel
panel.
ADHESIVE:
Pressure-sensitive layer applied to a tape. The most common of
the adhesive types is a combination of rubber and resin. To produce
pressure-sensitivity either natural and/or synthetic rubbers are
combined with resins. Other adhesives are: Acrylic adhesives,
which are synthetic polymers exhibiting the tack without resins
being added. Silicone adhesives, which are silicone gums and resins,
portraying the highest service temperature capability of the common
pressure-sensitive adhesive along with excellent ageing and weathering
characteristics.
ADHESIVE DEPOSIT:
Adhesive that remains on the surface after the tape is pulled
away and removed.
ADHESIVE SPLITTING:
When a layer remains of the adhesive on the surface from where
the tape was removed. See - Anchorage.
ADHESIVE TRANSFER:
From its normal position on the tape, adhesive is deposited to
the surface of which of the tape was in contact, either during
unwind or removal.
AMBIENT TEMPERATURE:
In an environment where temperatures are not closely controlled
fluctuating temperatures occur.
ANCHORAGE:
The degree of adhesion the adhesive has for the backing it is
being carried on. If insufficient anchorage occurs then this results
in a complete transfer of the adhesive to another surface. Distinctive
from splitting, where only a layer is transferred. See - Adhesive
Splitting.
ANTIOXIDANT:
A chemical is added to the adhesive to extend the usable life
of the tape by protecting if from oxygen deterioration.
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