Polyester is a chemical fibre and a microfibre, which consists of polyethylene terephthalate, or PET for short. The basic raw materials are coal, limestone, crude oil, and natural gas. Polyester is used in many of our straps which are required to permanently and reliably absorb large forces and recurring loads.
Even though, from a chemical perspective, polypropylene is relatively similar to PE, it has significantly harder and firmer properties with greater thermal resistance. The maximum continuous operating temperature is approx. 100°C. Special compounds allow for both higher as well as lower operating temperatures. These properties make polypropylene a particularly popular product in strap weaving.
Dyneema is a synthetic chemical fibre based on polyethylene with an ultra-high molecular mass. The fibres have the lowest density of all reinforcement fibres and the highest specific strength (ration of strength to weight). With its high load-bearing capacity, Dyneema straps can be thinner than polyamide webbing loops and still have the same load-bearing capacity.
Polyamides are processed into fibres at massive quantities, and also rank amongst the most important technical thermoplastics. These tough materials have a high strength and stiffness, excellent impact resistance, as well as good abrasion and wear resistance. Brand names include Nylona (PA 6.6) and Perlon (PA6).
Aramid fibres have a high specific (weight-related) strength, low density, high impact resistance, good heat resistance and dimensional stability, good vibration dampening, and a high energy absorption capacity. The strength perpendicular to the longitudinal axis of the fibre is relatively low. As such, the diagonal strength and the compressive strength of synthetic aramid fibres is significantly lower than those of GFK and CFK (e.g. interlaminar shear strength is approx. 50% of the material strength).
Basalt fibres are thin fibres made from basalt. Basalt fibres are created from liquid molten basalt at temperatures of approx. 1400(+/-50)°C. The composition of the molten liquid influences the physical properties of the basalt fibres. Contrary to carbon or aramid fibres, basalt fibres aren’t stretched but rather amorphous, similar to glass fibres. The high strength of basalt fibres compared to compact basalt is as such merely a result of the size-effect. Basalt is a highly valuable raw material for the production of textile belt straps.
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Carl Stahl GmbH & Co. KG,
Strap and tape weaving plant
Anhauser Str. 7
D-89542 Herbrechtingen
Tel.: +49 (0) 7324 / 9604 - 0
Fax: +49 (0) 7324 / 9604 - 20
Mail: contact@stahl-gurte.de