Comp - PP - Exipnos GmbH

Kunststoffe international, 2005-11-21, Coinjection of Thermoplastics and Elastomers
Coinjection of Thermoplastics and Elastomers Technical and Economic Aspects of a New Coinjection Technology Christoph Lange and Thomas Hungerkamp, Munich/Germany The production of composites by coinjection moulding is state of the art. High-precision, modular injection moulding machines and innovative mould technology now allow crosslinking elastomers to be injected in combination with thermoplastics. The economic efficiency of these new polymer/elastomer composites depends critically on...

Kunststoffe international, 2005-11-21, Polycarbonate (PC)
...s second behind ABS, ASA but before PA 6 and PA 66. Moreover, there is a market for PC in blends with ABS and other thermoplastic materials with a volume of approximately 300,000 t/a. Almost at the same time, in 1953, Bayer AG and General Electric Comp. announced their development of polycarbonate (PC). Since then, the product has been growing at a steady rate of 10 % p. a. Since the end of the eighties, growth rates for polycarbonate are clearly above those of other engineering thermoplastics...

Kunststoffe international, 2005-11-21, Reading by Laser
... Polygram. The new audio media provided stereo sound with a hitherto unachieved hi-fi quality, realised by a data reading technology based on laser technology. Ten years later, the CD-ROM was introduced, with a format that was ideal for distributing computer programs and games: With its capacity of 650 megabytes, equivalent to more than 450 floppy discs, the CD-ROM became the medium for distributing computer data. The introduction of the photo-CD, by contrast, was fraught with problems. It was l...

Kunststoffe international, 2005-11-21, Thermal Properties: Application-specific Thermal Conductivity
Composites Application-specific Thermal Conductivity Thermal Properties. Good heat removal is becoming more and more important in many technical applications with ever-smaller components providing ever-greater performance. Improved heat removal can also shorten the injection moulding cycle considerably. With suitable fillers, the thermal conductivity can be matched to the application. Peter Duifhuis Rob Mangnus Bernd Weidenfeller The integration of electromagnetic and mechanical components ...

Kunststoffe international, 2006-06-29, Study: Highly Qualified Specialists in Demand
Compounding Industry. Highly Qualified Specialists in Demand. Study. At present, the European compounding industry is in a phase of consolidation. Contrary to this trend, the masterbatch industry is continuing to grow as well as little, highly qualified compounding companies with special know how and international orientation. This is the result of a study by Applied Market Information Ltd. after interviewing 680 compounding firms in Europe. Thermoplastics compounding is a relatively complex...

Kunststoffe international, 2010-03-17, Materials for Pipes – Meeting Changing Requirements
...f course. Laying pipe out in the open (Fig. 3) was also a brave step, since the stabilizers employed at that time (soda and sodium phosphate) protected the PVC against thermal loads during processing, but not against the action of the UV components of sunlight – an experience that many citizens of the former German Democratic Republic made in the 1960s with their Vinidur rainwater pipes that shattered at the slightest impact after several years of use. Walter Buchmann in particular is to be than...

Kunststoffe international, 2010-11-25, Of Fibers, Foam and Nano (?)
...engineers. Bayer PU pensioners hold the names of Karl Breer, Peter Hoppe and Erwin Weinbrenner in great respect. Following stoichiometric requirements the components had to be simultaneously reacted in a stirred mixing chamber. An elegant variant, particularly for low viscosity components, was the counter flow injection mixing chamber, and the first prototype from 1950 is shown in Figure 8. Another device from the 1960s had a hand mixing head (in German “Handmischkopf” = HK) from the machinery m...

Kunststoffe international, 2017-07-19, A Thicket of Fibers
The growing quantity of components made from carbon-fiber-reinforced composites is giving rise to valuable scrap. To recycle these secondary fibers, the possibility of processing them into wet-laid nonwovens was investigated. The resulting nonwovens of suitable areal weight can be processed by the RTM process into composites with high tensile strength for thin-walled components. The quantity of carbon fibers (CF) is currently growing very strongly [1]. As a result of end-of-life products from th...