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Easy-flowing polyamides and polyesters

News International-French

29 Jun 2016

Specialty chemicals company Lanxess expands its range of easy-flowing polyamide 6, 6.6 and PBT compounds (polybutylene terephthalate). 

New generation of Durethan BKV 30 XF
The latest example of one such product innovation is Durethan BKV 30 XF (XtremeFlow). The polyamide 6 with 30 percent glass fiber content is the successor of Durethan DP BKV 30 XF and is over 17 percent easier flowing (flow spiral, 8 x 2 millimeters, 280 °C melt temperature). Compared to Durethan BKV 30, another standard polyamide 6 with 30 percent glass fibers, its flowability is 62 percent higher. The new material features a good mechanical property profile that is almost identical to that of its predecessor and also produces outstanding surfaces.

Virtually any warpage – new glass-bead-reinforced polyamide 6 grades
Also new are the three polyamide 6 compounds Durethan BG 30 X XF, BG 30 X H2.0 XF and BG 30 X H3.0 XF. They are reinforced with a 30 percent mix of glass fibers and glass microbeads and exhibit good flowability and low susceptibility to warpage. Featuring a good mechanical property profile, their flowability is more than 30 percent higher than that of Durethan BG 30 X, a similar standard polyamide 6.

Easy-flowing polyesters with lower density
Lanxess offers a wide range of easy-flowing Pocan XF polyester compounds. These materials include non-reinforced and reinforced products with flow properties that are usually much better than those of similar standard grades and are often more resistant to hydrolysis. One example of a non-reinforced PBT compound is Pocan B 1205 XF. Thanks to its outstanding flowability, this material is perfect for the trend toward miniaturization in the electrical engineering and electronics sectors. It is ideal for complex components with thin wall thicknesses, such as mini plugs. When thin wall thicknesses of such components have to be combined with high mechanical stability, Pocan B 3217 XF is the material of choice.

Lower filling pressure, lower melt temperature
The better a thermoplastic flows, the broader its processing window is. For example, processors can lower the melt temperature, which shortens cooling times and thus drives down cycle times, too. The end result is higher productivity. “For instance, Durethan BG 30 X XF helped to lower the melt temperature in the production of a fuse box by around 40°C compared to when using Durethan BG 30 X. That cuts the cycle time by 34 percent,” explains Theiler. Alternatively, filling pressures can be lowered, thereby reducing mold wear and maintenance outlay and giving processors the opportunity to use smaller injection molding machines with lower locking forces, which saves costs and results in added flexibility.

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