Crastin - PBT - DuPont

Kunststoffe international, 2005-11-21, Exhibition Preview: North American and Canadian Products at K 2004
...owder forms of its Hytrel copolyester TPE for slush molding of auto dashboard covers to replace PVC. The soft Hytrel skin would be backed by a Hytrel foam layer and mounted on a rigid support of Crastin PBT--thereby creating the first all-polyester dashboard structure, which could be recycled without separating its components. Incidentally, DuPont says foamed Hytrel films, which have a silky feel, are being laminated to PBT for several concept chairs being developed by the furniture industry. A...

Kunststoffe international, 2005-11-21, Optimised Process Control: Laser Welding in Computer Simulation
...nsparency of the top layer), and the melt depth (the last x value, here 0.011mm). The laser beam, with its radius of 2.5mm at a speed of 6000mm/min, acts on every point in the middle of the weld over a period of 50ms. The values obtained for Crastin S600 PBT, where the top layer absorbs 79% of the laser energy, are very different (also Fig. 4). In order to focus the remaining laser energy on a smaller area, a small laser beam diameter of 1.5mm is necessary so that the laser beam can, at the same...

Kunststoffe international, 2005-11-21, Plastic, the All-purpose Material: Function in Form
...erences. The desire to skate ever faster and with even less effort is met by the large skate rollers from MGM, Vedalgo, Treviso/Italy, with diameters of 90 or 100mm (Fig.7). The thermoplastic polyester Crastin PBT from DuPont provides its hub/rim combination with the required impact resistance and dimensional stability, and a good balance of elasticity and stiffness. The new Fila inline skates from MGM – Matrix2004, Vertige and WorldCup90 are equipped with these rollers. The sports article manuf...

Kunststoffe international, 2005-11-21, Polybutylene Terephthalate (PBT)
...ss of 165°C, as well as oils and battery acid. The material’s high stiffness and strength permit low wall thicknesses despite mechanical loading. In addition, this particular PBT does not emit any gases that could damage contacts. Product type Crastin S700 is similarly a non-reinforced PBT with particularly pronounced damping properties for applications such as insulation against vibration or the prevention of vibration triggered by vehicle bodies or by components including front headlamps. A fu...

Kunststoffe international, 2005-11-21, Process Comparison: Profitable Injection Moulding with Nitrogen or Water?
...e washed out and cause rough interior surfaces (Fig.3). Three materials, which can also be successfully processed both by GIM and WIM, were compared with one another: - PA 66 Durethan BKV 30 GH from Bayer (2.40 EUR/kg), - PBT Crastin T803 from DuPont (2.20 EUR/kg), - PP from DSM (0.80 EUR/kg). Higher Purchasing Costs, Lower Raw Materials Consumption The parts are produced on a Battenfeld TM 4500/2800 Unilog B4 injection moulding machine with a clamping force of 4500kN. It is fitted with an in...

Kunststoffe international, 2005-11-21, Retrofits: No Fear of Foaming
...educe the extent of optimisation. Experiments conducted at the European Technical Centre of DuPont in Geneva/Belgium show the results of such a material optimisation (cross section of moulded part and microscopic picture in Fig.6). A PBT (grade: Crastin LW9320 BK; manufacturer: DuPont) was processed without any additional additives. Since this material is extremely well-suited for foaming, it was possible to achieve a very uniform structure with very little efffort using nitrogen as the blowing ...

Kunststoffe international, 2005-11-21, Thermoplastic Elastomers (TPE)
...ch as 3D blow moulding permit the low-cost production of moulded parts with rigid and flexible sections in just a single processing operation. One example is the air duct shown in Fig.4 which is produced by sequential coextrusion blow moulding. The Crastin PBT and Hytrel TPE-E grades (manufacturer of both grades: DuPont) have a similar viscosity and virtually identical swelling behaviour. Both meet the stringent requirements for application in the engine compartment: the air ducts are resistant ...

Kunststoffe international, 2006-03-07, Mass Production: Unlocking the Foaming Process
...deflection. A positive side benefit of this design is easier filling of the functional element with a position at the flow-path end. Because of the high requirements in the field, a PBT with glass fibres was chosen for this application (grade: Crastin LW9320BK; manufacturer: DuPont). This material is characterised by good flow properties, uniform shrinkage and good foaming properties. The glass fibres not only influence the mechanical properties, but also promote foaming through their additional...

Kunststoffe international, 2006-09-08, Carrier Film: New Possibilities for Decorating Thanks to 3-D Dye-Sublimation Printing
...ion technology include a new electric water boiler and two snowboard bindings. Other products are under development. The ColorClick water boiler from Tefal (Fig. 5) has a two-piece, removable outer shell of polybutylene terephthalate (PBT; type: Crastin). The water tank itself is made of polypropylene (PP). The outer shell is available with various decorations and patterns. The variously coloured and patterned half-shells impart an especially appealing appearance that can be matched to the parti...

Kunststoffe international, 2006-09-27, Processes in Synergy: Hot-plate Welding for High-melting Polymers
...red and is surrounded by a dark border region Fig. 5. In the mass-production process there is not material exchange at the hot plate after one welding operation (in this case, PA6 natural) Fig. 6. Weld-seam quality for the combination Crastin 6129 NC010 (PBT, light-coloured component) mit Hytrel HTR4275 BK316 (TPC-ET, dark component); top micrograph, bottom exterior view Table 1. Plastics for the weld studies Table 2. Increases in weld strength obtained by hot-plate welding with and without ...

Kunststoffe international, 2007-09-19, Energy Efficiency Taking on Increasing Importance
...he bodywork assembly by around 32 % on heavy goods vehicles too, resulting in a weight reduction of some 2.6 kg per vehicle. On the TG heavy goods vehicles made by MAN, three elements of this assembly are injection molded in glass fiber reinforced Crastin PBT from DuPont, Bad Homburg, Germany. This is the first series application for a glass fiber reinforced thermoplastic in the Class-A zone of a heavy goods vehicle. According to Bayer MaterialScience AG, Leverkusen, Germany, the roof module of...

Kunststoffe international, 2008-10-17, Polybutylene Terephthalate (PBT)
...ith optimized processing behavior has recently been seen. It has been found that grades with reduced shrinkage show a clear advantage in demolding behavior due to reduced shrinkage onto the core. Grades that should be highlighted in this respect are Crastin CE2055 from DuPont, Ultradur B4560 from BASF and Pocan KU2-7003 (Fig. 7) from Lanxess. Extreme Challenges for Hydrolytic Resistance Particularly within the automobile industry the requirements in respect of hydrolytic resistance for P...

Kunststoffe international, 2013-01-28, Skillful Forming
...nt: The “Flex Back” backrest, for example, is made from renewable raw materials based on the thermoplastic polyester elastomer DuPont Hytrel RS TPC-ET; DuPont Hytrel TPCET and DuPont Crastin PBT are used for the “Dynamic Suspension”. These two elastic elements give the office chair its high elastic adaptability and supporting effect. It also supports the wide variety of sitting positions and movements necessary in the working world today and always returns to its initial form. Conclusion Exclusi...

Kunststoffe international, 2014-10-10, Polybutylene Terephthalate (PBT)
... headlamp and there are no deposits on the polished surface of the injection mold. Tailored PBT compounds with minimized fogging characteristics allow reliable production of bezels with a flawless surface, e. g. Pocan B 1204 from Lanxess, Crastin CE2055 from DuPont or Ultradur High Gloss B4570 from BASF. Flame-Retardant with Balanced PropertiesThe buoyant demand for flame-retardant PBT compounds continues unabatedly thanks to the stable growth of the electrical/electronics, IT, and consumer good...