Safety marked sewing and embroidery threads
Product piracy causes great economic damage to the textile and apparel industry. This results in the need to provide high-quality textiles with simple but also court-proof security features to prevent counterfeiting. The aim of the project is to develop sewing or embroidery threads that can be used as unique security features for textile products. For this purpose, IR-absorbing (mainly lanthanum hexaboride nanoparticles) and possibly colored or luminescent nanopigments are preferably used in the melt spinning process. A combination of different features results in a large number of variations that enable a specific and unambiguous fingerprint in security yarns, which can be visualized by a three-step detection procedure - optical detectability, readout by simple means, and unambiguous spectroscopic evidence. DWI will be responsible for the selection, production, dispersion and incorporation/compounding of suitable nanopigments in polyester as well as the characterization/measurement of the marking effect. Masterbatches with incorporated nanopigments will be produced. The ICTF's task is to investigate and use the labeled materials in the melt spinning process. The ITV will develop and manufacture sewing and embroidery yarns and will be responsible for yarn characterization. Application testing of the sewing and embroidery yarns will be carried out at members of the PA. The proof of the safety features after processing in textile products will be worked out jointly. In the case of IR pigments, initial testing can be done using a simple IR camera. For forensic proof of a counterfeit, an IR spectroscopic examination can reveal even small differences. Users are manufacturers of special yarns and garment makers of high-priced workwear, sportswear, safety clothing and fashion items, all predominantly SMEs.