Page 60 - Plastics News March 2020

proDuCt news

ENGEL launches the next Polyplastics launches DURANEX

generation of all-electric e-cap for improved PBT for high-
injection molding machine voltage automotive components

NGEL recently announced launch of the next generation he Polyplastics Group has recently launched
Eof its all-electric e-cap injection molding machine TDURANEX® PBT CG7030 with an improved
series for beverage caps. The more stable and efficient polybutylene terephthalate (PBT) grade. The PBT
series of machines sets a new standard as it is considered features an improved tracking resistance for a range
to be faster than the hydraulic machines that used of high-voltage automotive components. Being a 30
accumulators for the injection movement to produce
caps.The new e-cap 380 machine from ENGEL can produce
29/25 lightweight caps, making it clear how continuously
increasing requirements can be combined with shortest
cycle times, highest precision and lowest energy
consumption. Friedrich Mairhofer, product manager for
all-electric injection molding machines at ENGEL observing
that since 2010, the requirements for beverage caps have
changed substantially. Explaining the reason behind the
continuous further development of e-cap into a next-
generation machine, Friedrich highlights that continuous
part weight reductions play a central role. Mentioning
that for still water, caps with a weight of significantly less percent glass-filled grade, it delivers strong dimensional
than one gram are produced today, Friedrich remarks, “As stability and highly stable electrical resistance, besides
a result, the cooling and cycle times have continued to having dielectric breakdown properties. DURANEX
drop.”Recalling the cycle times ten years ago were still 2.5 PBT CG7030 exhibits highly superior dimensional
seconds, Friedrich informs, “Today’s cap machines need stability. Polyplastics reports that both moisture
to be able to produce at 2-second intervals and faster.” absorption and dimensional change rates for PBT
The e-cap 2440/380 from ENGEL produces 29/25 caps grades are around one-tenth of the values observed
in a 96-cavity mould by Plastisud. It’s shot weight is 1.3 for PA66-GF33 percent. DURANEX PBT CG7030 also
grams per cavity and a cycle time of less than 2 seconds. has improved volume resistivity as opposed to the
An HDPE from Borealis/Borouge is processed. The system PA66-GF33 percent, which shows significant declines
is equipped with camera-supported 100 percent quality in high heat and high moisture environments.Since the
properties of PBT grades experience little change in
hot and moist environments, Polyplastics determined
that they are more suitable than the PA66 for usage
in high-voltage applications. It is to be informed that
Polyplastics has conducted extensive testing of both
PA 66 and PBT in temperature environments ranging
from -40ºC to 140ºC for electric car applications that
include batteries, power control units (PCUs), and
motors/generators. The test results also show that
the DURANEX PBT CG7030 is capable of maintaining
inspection by IMDvista and a dry air system by Eisbär. Other its dielectric breakdown strength in high heat and
system partners are Piovan, PackSys Global and PSG. The humid environments (85ºC/85%RH, after 1,000 hours).
e-cap 380 has a fast dry cycle time of 1.3 seconds. The Indeed, a significant decline of around 40 percent was
parallel movements included in the standard right from
the outset make an important contribution to achieve observed for PA66-GF33 percent in high heat and high
cycle times of less than 2 seconds. moisture conditions.

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