Zwick Materials Testing - manufacturer of materials testing machines

Zwick has developed a complete testing system for carrying out the coefficient of friction tests according to the latest ASTM D1894 standard. The system components include the testing machine, tools and fixtures for clamping the specimen, and specially configured testXpert® II software for automating the test procedure. Results can also be transferred online to Laboratory Information Management Systems.

The test method ASTM D 1894,
2001 covers determination of the
coefficient friction (COF) of
plastic film and sheeting when
sliding over itself or other
substances under specified test
conditions. The procedure
permits the use of a stationary
sled of specified weight with a
moving plane, but it is also
possible to use a moving sled
with a stationary plane because
both methods deliver the same
coefficient of friction values for a
given test specimen.

Zwick has developed testing
systems which meet the
requirements of both the ASTM
and ISO standards, and the
ProLine COF testing system is a
perfect and affordable choice for
such tests. It utilizes Zwick’s
latest high resolution digital
technology and precision
engineered tooling as well as
testXpert®II, the intelligent and
reliable software configured
especially for production control
environments.

For the coefficient of friction test
the sled is normally attached to
the moving crosshead of the
testing machine and pulled
across the second surface of the
specimen at a constant speed of

150 ± 30 mm/min (6 ± 1.2 in/min).
The static force required to
initiate the sliding action and the
kinetic force to maintain motion
are determined automatically by
the testing software then
combined with the sled weight
and reported as static and kinetic
coefficient of friction.

TestXpert®II software completely
automates the testing process,
from the safe control of the
testing machine parameters and
recognition of the sensors
connected to the system, to
ensuring that the test results are
of the highest possible accuracy
and integrity. Customers also
benefit from the network enabled
technology which allows bidirectional
communications to an
organization’s IT infrastructure
helping to improve testing
efficiency whilst saving time and
reducing the overall cost of
testing.

For more information about
testing equipment, application
advice for the testing of films, or
general questions concerning this
article please contact us at
www.zwick.com, send an Email
to info@zwickroell.eu or contact
your nearest sales office.