May 12, 2005
Plastics Opens Doors
at High Speed
Seattle, WA, USA--(Jobwerx News)--Nano particles resin enhancement
enables difficult parts to be easily manufactured and improves cycle
time for plastic injection molded thin-wall products.
Ultradur High Speed polybutylene terephthalate (PBT) from BASF, introduced
at the K 2004 show last
October in Duesseldorf, Germany, is now commercially available in
North America. The new product line features advanced flow properties
that deliver improved cycle times, especially for injection molded thin-wall
Ultradur is the trade name for BASF’s partly crystalline, thermoplastic
polyester based on polybutylene terephthalate (PBT). It is used as a
material for high-quality, highly stressed engineering parts in a wide
variety of industrial sectors. Ultradur features high stiffness and
strength, very good dimensional stability at high temperatures, low
water absorption, good resistance to many chemicals, and outstanding
heat aging performance.
Ultradur High Speed PBT grades can flow up to twice the distance as
standard PBT resins, depending on the glass fiber content. This is accomplished
through a special additive BASF developed that contains nano particles.
The additive particles are significantly smaller than house dust mites,
between 50 and 300 nanometers in size, and greatly influence the rheology
to reduce the melt viscosity by up to 50 percent.
This enhancement enables difficult, thin-walled parts to be easily manufactured.
In addition, the other attributes of BASF’s Ultradur High Speed PBT,
such as mechanical properties, shrinkage and heat resistance, are very
similar to traditional PBT products.
“Ultradur High Speed PBT opens up many design opportunities for our
customers,” said Joe Venner, Director of Product Management for BASF’s
Engineering Plastics business in North America. “The change in rheology
brings a series of benefits for plastics injection molders because the
lower viscosity of these advanced grades means that smaller injection
and holding pressures can be applied, or the molding temperature can
be lowered and the holding time shortened. Overall, this increases the
application capability range for PBT products, as well as improves cycle
times for our customers.”
According to Venner, Ultradur High Speed PBT will be targeted for applications
in the automotive and electrical/electronic markets. “The easier flow
properties of Ultradur High Speed PBT will allow parts with higher filler
contents, like glass fibers, to be molded, resulting in better mechanical
properties at a reduced wall thickness in these sectors,” he said.
One of BASF’s customers recently developed a commercial application
for its Ultradur High Speed PBT in Europe molded with the B4300 G2 10
percent glass-filled grade. The exceptional flow properties of this
resin enabled the production of a plug-in connector for laptop computers,
telephones and other devices with an Internet connection. The small
and very intricate component, which weighs just 1.5 grams, was challenging
to produce because the complex tool had eight cavities that were difficult
to fill using conventional PBT. In addition, air was often found on
the thin connector ribs, resulting in a high amount of scrap. Using
the Ultradur High Speed PBT grade led to improvements in the filling
and de-aerating of the tool, and resulted in reducing cycle time by
20 to 25 percent.
BASF’s Engineering Plastics business is one of the largest plastics
suppliers in the world. BASF offers a comprehensive product line and
market expertise ranging from commodities to engineering and high-performance
materials in thermoplastics, foams and urethanes. Research and development
operations for BASF’s plastics businesses in North America are based
at the Plastics Application Center in Wyandotte, Mich. Our Engineering
Plastics business also operates an Applications Development Laboratory
in Mount Olive, N.J.
The portfolio of BASF’s Engineering Plastics business is comprised of
the "4 Ultras" - Ultramid® polyamide (PA) nylon-based resins, Ultradur®
polybutylene tererphthalate (PBT), Ultraform® polyacetal (POM), and
Ultrason® polysulfone (PSU) and polyether sulfone (PES). The other products
are Petra® post-consumer recycled polyester and Nypel® post-industrial
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