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The use of amber filler for the preparation of a new type of polymer composite fiber is described in detail for the first time. Scanning electron microscopy (SEM), atomic force microscopy (AFM) and granulometry testing were used to test the structure and the size of the prepared amber particles. The obtained amber particles were characterized by an average size of up to 3\u2009\u00b5m and a regular shape. Fourier transform infrared (FTIR) spectroscopy investigations showed that amber in the dispersed state does not change its chemical structure and contains one of the active compounds\u2014succinic acid. The effect of the amber filler inclusion on the melt-spinning routes of fully drawn yarns (FDY) and pre-oriented yarns (POY) was determined. Amber composite fibers general use is medical fabric (compression socks and tights); it is biocompatible with skin cells.<\/jats:p>","DOI":"10.1177\/0040517515621130","type":"journal-article","created":{"date-parts":[[2015,12,16]],"date-time":"2015-12-16T20:52:05Z","timestamp":1450299125000},"page":"2127-2139","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":18,"title":["Application of amber filler for production of novel polyamide composite fiber"],"prefix":"10.1177","volume":"86","author":[{"given":"Sergejs","family":"Gaidukovs","sequence":"first","affiliation":[{"name":"Riga Technical University, Faculty of Material Science and Applied Chemistry, Institute of Polymer Materials, Latvia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Inga","family":"Lyashenko","sequence":"additional","affiliation":[{"name":"Riga Technical University, Faculty of Mechanical Engineering, Transport and Aeronautics, 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