A winding tube is provided for a web-shaped semi-finished product or finished product. The tube comprises a cylindrical, elongated tube body having an inner wall. A data carrier that can be read in a contactless manner and that contains data about the web-shaped semi-finished product or finished product is secured to the tube body by means of a tubular holding element, positioned within the tube body. The data carrier is held in the interior of the tube body spaced from the inner wall.

 
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> Process of making polymer blends

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