BASF expands Ultramid line for water-injection technology

BASF is expanding its assortment of polyamide grades that have been optimised for the use of water-injection technology (WIT) in injection muolding.

The new WIT grades are Ultramid A3HG6 WIT Balance and Ultramid A3WG7 WIT.

The WIT enables hollow plastic parts, for example, for medium-carrying lines that require a very good inner surface, to be produced by injection moulding. These two materials are now available in commercial quantities.

Owing to its improved hydrolysis resistance, the polyamide (PA) Ultramid A3HG6 WIT Balance is particularly well-suited for components that carry coolant or that come into contact with water. At the same time, the content of PA 6.10 in this material also translates into high stress-cracking resistance to calcium chloride, thus taking into account the more stringent requirements made in terms of resistance to road salt. Particularly in Asia, calcium chloride is often spread on icy roads.

For components that require oil resistance, stiffness and dimensional stability, BASF recommends its new Ultramid A3WG7 WIT, which is reinforced with 35% glass fibres, especially for tubes that convey oil such as those employed for dipsticks. Both materials work well for WIT processing

Meanwhile, the hydrolysis-resistant basic product of the WIT series, namely, Ultramid A3HG6 WIT, has become the material of choice for many WIT applications such as cooling water pipes, according to BASF.


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