Technical yarns are used in a very wide range of applications in everyday life: industrial textiles, geotextiles and packaging textiles are just a few examples. As versatile as the range of applications is, the demands on the production technology with which technical yarns are manufactured are equally high. Not visible from the outside or visible only at second glance, a number of technical yarns are "hidden" in many products. Their task is, among other things, to absorb loads at a more or less precisely defined elongation. The desired elongation behavior does not result from the textile material alone. The yarn construction, i.e. its structure combined with it twists, also has a very decisive influence on the material properties. Not visible, for example, because they are hidden in the steering wheel, the dashboard and the door trim, the airbags, today, they are part of the standard equipment of every car. The starting point for producing airbags is very often yarn made of polyamide (PA) or polyester. These yarns must first be given a few twists to smoothly weave into a textile fabric.
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