processing feature | Reactive extrusion
The abrasion resistance of TPU is exploit- ed in Andaluz Accessibili-
dade’s tactile pedestrian surfaces,
produced in
Bayer Material- Science’s Desmopan
worked on projects such as the development of bio-based polyamide by polycondensation. Setup specialists have been involved in a
wide range of reactive extrusion projects, including Evonik’s process for the produc- tion of TPUs using fumed silica and the development of its Aerobatch processing aids. The company also has a technique for the production of a polypropylene homopolymer that can be crosslinked in a secondary process, which it markets as PPX. Most recently, Setup worked with French agricultural
KraussMaffei Berstorff twin-screw extruder configured for production of polymer
bonding agents
products company Roquette in the development of its Gaialene biopolymers, which are based on grafted starch blends and are claimed to offer performance considerably improved on current starch blends. Roquette’s patent details a reactive extrusion
process that brings together starch, plasticizer, polyole- fin, compatibilizers and a variety of bonding agents to create a durable starch/polyolefin blend suitable for processing using conventional techniques such as injection moulding or extrusion. Roquette commissioned a 25,000 tonnes/year production scale plant to manufacture Gaialene
biopolymer blends at its site at Lestrem in north- ern France at the end of last year. Meanwhile, Switzerland-based List has developed a
kneader reactor that provides an alternative to solvent- based polymerisation. It is claimed to have found applications in a variety of polymer reaction and compounding applications. Aside from eliminating the additional costs involved in handling solvents, the kneader technology also provides improved thermal control compared to stirred tank systems due to the incorporation of thermal regulation circuits within the mixing shafts and elements as well as the reactor jacket. According to List, the benefits of using its technology – which is available in both single-shaft and twin-shaft variants - include higher outputs from smaller production systems, simple scalability, reduced product handling, and lower energy consumption. List has a wide range of kneader reactors available
for project development at its technology centre at Arisdorf in Switzerland. The company also works closely with the Fraunhofer Institute, which has a semi-commercial scale kneader reactor installed at its Polymer Pilot Plant Centre at Schkopau in Germany.
Click on the links for more information: ❙
www.kraussmaffei.com ❙
www.setuperformance.com ❙
www.roquette.com ❙
www.list.ch
AMI Strategy Seminars
These one-day seminars are given by an AMI director and provide invaluable insights into market trends and industry strategies. They are held in small groups and provide ample opportunities for questions and discussions.
16 October 2012: Cologne, Germany 5 November 2012: Philadelphia, USA 12th November 2012: Dubai
Click here to download our 2012 brochure
www2.amiplastics.com/Seminars
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