Page 72 - Plastics News December 2019

FEAturEs

process. Automating is the best option and will allow you cannot be considered failsafe, and if the system locks up,
to continue to mold, keeping the process stable. It is also it can continue to run until someone discovers the issue.
critical to ensure you have built in effective reject logic Most of the third-party process-monitoring systems I have
in your monitoring to prevent the machine from running worked with will also accept a good-part signal if you
excessive scrap rates. make that part of your system specification. A process-
monitoring system that requires a good-part signal to be
Failsafe to Avoid Failures received and defaults to reject, is a system that is truly
Is your process monitoring failsafe? Most monitoring failsafe. It is important to remember that regardless
systems are programmed to look for a reject signal. So, of how tight monitoring limits are set, the first step in
if the monitoring system doesn’t receive a reject signal, effective process monitoring is the process development.
parts are considered to be within process limits. So, what Establishing limits for unstable processing conditions or
happens with a system crash? Remember, these systems tooling conditions will ultimately prove ineffective in
are basically computers, and we all know that even the preventing unacceptable product from escaping. Once you
best systems have software issues from time to time. If have mastered process development, effective process
the system is only looking for reject signals, that system monitoring ensures you’re always running to that process.

BRUGGOLEN modifiers help with upcycling

BRUGGOLEN modifiers help with upcycling form polyamide waste to high-quality injection moulding grades

rüggemann BRUGGELEN M series of reactive chain the excessively long molecular chains of high-viscosity
Bmodifiers allow precise and reproducible adjustments polyamide waste found in materials such as high viscosity
of relative viscosities, by either lengthening excessively extrudates, films, or cast nylon. Addition of just a small
short chain or shortening those which are too long.Producers quantity of the additive during a single extrusion step
can use small amounts of these modifiers to tailor relative is able to decrease the viscosity so that the polymer
viscosities to their needs in a single compounds step, can be injection moulded. The final viscosity can be
and the resulting upcycled materials exhibit excellent accurately controlled by adjusting the quantity added,
mechanical properties and are suitable for the same and significantly, the mechanical properties of mouldings
applications as prime materials of similar viscosities. This from the resultant polymer are similar to those achieved
removes the need to by prime polyamides.Using BRUGGOLEN M1251 makes
blend the recyclate it possible to compensate, by linear chain extension,
with prime polymers for the reduction in molecular weight arising from the
and opens up a wide degradation caused by processing and previous use. As a
range of possibilities result, the mechanical properties of the recyclate can be
for establishing a improved to match those of prime materials.BRUGGOLEN
profitable market for M1253, available as a smaller pellet size of the same
secondary polyamide additive, makes for easier dosing during compounding.
raw materials which Both modifiers are supplied as dust free polymeric granules
meet the high-quality suitable for accurate metering, and are easy to process
requirements of the and to disperse in the polyamide matrix.Brüggemann
moulding industry. wants to be in the forefront of customers' minds when
they want heat stabilization. "That's what we do," he said,
BRUGGOLEN TP-
M1417 provides a calling that work a core competency. "It's clear that it's a
precise and robust typical behavior of Brüggemann. We get questions from
way of shortening the market requirements and we try to get a solution,"
Beck said.

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