A gathering of small particles into a larger mass.
Test for determining the relative ease of removing air from
Irregular area in the surface of a fused plastisol; usually
caused by water, solvent, or air contamination.
A measure of the low shear viscosity of a plastisol, as determined
with a Brookfield rheometer.
Pouring plastisol into an open mold or injecting plastisol
under low pressure into closed matching molds, then heating
to achieve fusion.
The removal of entrapped air from a plastisol compound. This
is usually accomplished by subjecting the vinyl dispersion
to a vacuum ether during mixing or in a later operation.
A liquid that increases in viscosity with increasing shear
Additive used to lower the viscosity of a plastisol.
A process by which plastisol becomes a functional part of
the object dipped.
A process similar to hot dip coating, in which the finished
product is the fused plastisol stripped from the dipped mold.
Dip molding is used to produce such articles as gloves, grips,
and protective caps.
Finely divided particles of a material suspended in liquid.
The measure of the hardness of a material.
A measure of how far a film of fused plastisol can be extended
A chemical ingredient designed to produce an emulsion of two
liquids which do not naturally mix; also called “soap.”
The ease with which a material may be set afire.
Materials that are added to a system to reduce cost and/or
modify the system or the properties of the finished product.
The heating process by which the PVC resin and other components
are transformed from their original state to a new, homogenous
The moment at which all liquids are absorbed by the resin,
changing the plastisol from a liquid to a solid.
A test yielding information on the size of particles within
The use of a blade-like device to apply a coating of plastisol
in a single pass, to paper, fabric, metal, or a release substrate.
The process by which plasticizer or other materials migrate
from a partially fused or fused vinyl film.
A liquid whose viscosity is independent of shear rate.
A cast molding process in which plastisol is formed into a
finished article or cast in place as part of a composite article,
such as a water filter or automotive air filter.
A plastisol to which a solvent has been added.
Fine-particle size PVC material which forms a plastisol when
mixed into a liquid plasticizer.
High-boiling organic liquid or low-melting-point solid that
imparts flexibility to PVC resin.
A liquid composed of PVC dispersion-resin dispersed in a plasticizer.
A liquid that decreases in viscosity with increasing shear
The study of the deformation and flow of matter, incorporating
viscosity measurements as well as how viscosity changes with
An instrument for measuring the flow of liquids.
Used to create hollow forms (flexible or rigid) with complex
shapes and even varying wall thickness. The process involves
introducing a precise amount of plastisol into a mold, then
rotating the mold in two planes while heating it, to disperse,
gel, and fuse the plastisol in a single step.
A method for totally impregnating a substrate with a plastisol
The application of plastisol through a fine screen, usually
with a stencil in place to produce a specific design or portion
thereof. Highly detailed, multi-colored images are possible
with this process.
A measure of the high shear viscosity of a plastisol as determined
with a Severs rheometer.
The velocity gradient applied to a liquid.
Used to create hollow, flexible items. A quantity of plastisol
is poured into a heated female mold, causing gelling of the
plastisol directly in contact with the heated surfaces. The
excess plastisol is poured off and the gelled layer is fused
with heat. After fusing, the finished item is removed from
The ratio of the weight of any volume of a substance to the
weight of an equal volume of water at 4º C.
Burnt resin or dark flecks resulting from overheating in the
A process involving the use of airless spray systems to coat
large objects, vertical surfaces, irregular or shapes, often
in-place. With spray coating, unlimited passes can be made
in order to achieve the desired coating thickness. Decorative
effects can be achieved using special spray heads.
A surface-active agent used in plastisols to reduce viscosity
and improve air release.
The breaking strength of a material when subjected to a breaking
force; commonly expressed in pounds per square inch.
A decrease in viscosity of a liquid due to low shear force
being applied continually.
Used for applications where the position, thickness, hardness,
softness, or decorative effect must be tightly controlled.
The ability of a substance to resist degradation from exposure
to an ultraviolet source.
The degree to which a liquid resists flow under applied force.
The tendency of a plastisol to change in viscosity during
The force necessary to induce the flow of liquid.