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Covestro Develops Transparent Grades of Thermoplastic Polyurethanes for Modern Ski Boots

27 September 2016

Covestro has showcased a new ski boot, the Salomon X-Pro 70 W, a boot for all types of skiing, boasting low weight and well-balanced performance features.

Covestro explais, today’s high-performance ski boots are lightweight and provide a comfortable, but snug fit. The outer shell protects skiers from injuries and reliably transmits force to the skis.

The ski boot’s lower shell is made of thermoplastic polyurethane (TPU) from Covestro which it says is excellently suited to this application because it combines high stiffness and an attractive appearance with a long service life and wear resistance.

The upper cuff gets its strength from a reinforced rear, lateral insert. In contrast, the softer front cuff ensures that the boot has a snug, but flexible fit on the leg. It likewise is made of TPU.

Covestro says its transparent grades of its Desmopan DP 96xx offer a unique degree of design freedom and a view of the internal workings of the boot.

According to Covestro, the special property of these new products is their high transparency. It says is so high that they can be used in wall thicknesses of up to six millimeters with no noticeable clouding. The polyether TPUs are resistant to hydrolysis, microbes and UV exposure, making them ideal for outdoor applications such as ski boots and soccer shoes.

The materials are described as being flexible and elastic over a wide range of temperatures, but at the same time very durable, satisfying all demands with respect to wear resistance, tensile strength and scratch resistance. Moreover, they contain no plasticisers or halogens. At the end of their service life, the TPU material can be recycled.

The new transparent Desmopan DP 96xx grades from Covestro can be injection-moulded but also extruded, for instance to fabricate tubes, sections and flat films.






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