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March 02, 2018 12:00 AM

Mammut taps TPEs for avalanche-rescue device

Patrick Raleigh
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    The range of devices has recently been expanded to include two Barryvox transceivers (transmitter/receiver) with optimised technical and construction characteristics.

    The units include a case seal as well as casing parts made of polyamide and a thermoplastic elastomer compound (TPE) using multi-component injection moulding.

    A compound from Kraiburg TPE is used here, featuring excellent adhesion to polyamides (PA) and thus providing the life-saving device with outstanding sealing quality and consequently a high degree of operational reliability.

    Mammut, a Swiss manufacturer of outdoor equipment, is regarded as being the pioneer and market leader in the field of avalanche locating devices.

    The new technology used in the Barryvox transceivers enhances precision and speed in locating skiers and ski-tourers who are buried in avalanches.

    The brand name commemorates “Barry, the lifesaver” – the legendary avalanche search and rescue dog at the Great St. Bernard Hospice that helped locate hundreds of avalanche victims in the early 19th century.

    In addition to integrating pioneering locating technology, Mammut has also optimized the handling of the new Barryvox device.

    The case shell with its rear side elements is made of a TPE/PA compound construction that is processed using multi-component injection moulding without additional bonding agents.

    The flexible TPE – a Thermolast K compound from Kraiburg TPE – provides pleasant touch characteristics and contributes significantly to the devices’ non-slip single-hand/glove handling. The soft component is also used for the internal case seal.

    “The major criteria for choosing this thermoplastic elastomer for our new Barryvox transceivers were its mechanical properties, its good grip and, last but not least, its reliable adhesion to polyamide,” says Ilari Dammert, senior product & project manager for avalanche safety at the Mammut Sports Group.

    “The TPE compound selected meets all of these requirements to a high standard and in particular features superb low-temperature flexibility, which is a must for devices used at temperatures down to –25 °C.

    The TPE compound was specially developed for adhesion to polyamide. The materials can also be matched to various hard components and do not need any bonding agents when they are injection-moulded onto semi-crystalline polymers such as polyamide.

    In choosing Thermolast K from Kraiburg TPE, Mammut has opted for a material produced in accordance with ISO14001 (environment standard) and ISO50001 (energy standard).

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