| CALENDER:
A machine with pressure rollers to make plastic webs, which are
thin, or applying adhesive and coatings to substrates such as
cloth.
CALENDER COATER:
Coating machine without solvents, used mainly for the application
of adhesives to cloth and heavy substrates of tape.
CALIPER:
A measurement of thickness, can be expressed in one-thousandths
of an inch or millimeters.
CASTING ROLL:
Part of the reverse roll coating head that casts or applies adhesive
to backing.
CELLULOSE:
The natural occurrence of a basic chemical building block making
up paper fiber.
COATED CLOTH:
Fabric that has been given a coating of rubber or plastic to increase
resistance of moisture.
COATER:
A machine used in applying adhesive to tape backing.
COATING:
Applying solution to various types of materials by using reverse
roll coating, air doctor, doctor roll and knife coating equipment.
Using this process raw backing is then converted to pressure-sensitive
tape.
COHESIVE STRENGTH:
The internal strength of the adhesive and its ability to resist
stresses caused by external pressures.
COLD FLOW:
The minute flow or slow movement of a semi-solid substance when
stress is involved. Pressure-sensitivity implies cold flow, accounting
for increasing adhesion as time or pressure goes on. Relating
also to the oozing of adhesive from roll edgings and increase
of adhesion on porous surfaces to the point of adhesive transfer.
Terms
used in describing effects of cold flow are:
1. Firm: Resistance of adhesive to the flow or distortion.
2. Mass Exudation: Condition of sides of a roll when sticky
due to flowing out from between layers of
tape.
3. Oozing: Similar to mass exudation again resulting in
tackiness on sides of tape rolls.
4. Plasticity: Measure of resistance to flow.
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COLOR:
Coloring of the tape viewed from the backing side, irrespective
of the color of the adhesive or other components.
COLOR STABILITY:
Retention of the tapes color when exposed to light.
COMPRESSION SET:
Deformation of rubber or plastic resulting from pressure.
CONDUCTIVITY, SURFACE:
Tapes ability to carry electrical currents along its surface.
CONFORMABILITY:
Tapes ability to fit within a space making total contact with
the surface without creasing or folding.
CONTAMINANT:
Impurities, in trace amount, which often render product unfit
for specified use.
CORROSION:
The deterioration, by either electrolytic or chemical, of a surface
to which tape is applied.
CREEP:
Slow dimensional changes caused by continuation stress.
CREPE PAPER:
A paper, which has been crafted to give conformance and flexibility,
keeping good tensile strength.
CROSS-LINK:
Increase of strength and heat resistance formed by a chemical
bridge between molecular chains.
CURING:
See - Heat Curing.
CURLING:
When roll is unwound the free ends of the tape curl back on themselves.
CUT-THROUGH RESISTANCE:
A tapes ability to withstand wire lead cuts or sharp edges of
a package or part.
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