Anti-fake adhesive composite sewing thread and preparation method thereof

Abstract

This invention relates to an anti-counterfeiting viscose composite sewing thread and its preparation method, belonging to the field of sewing thread technology. The invention first pre-treats viscose fibers with cationization to enhance their binding force with anionic dyes. Then, four differentiated dyed viscose fibers are prepared using natural fluorescent dyes turmeric and madder, and protein fluorescent dyes phycocyanin and phycoerythrin, respectively. The naturally dyed fibers are designed with a coarser fineness and a longer cut length, while the protein fluorescent dyed fibers are designed with a finer fineness and a shorter cut length. These fibers are mixed in equal proportions with base fibers and spun into an anti-counterfeiting viscose composite sewing thread through cleaning, carding, drawing, roving, spinning, winding, and twisting processes. This sewing thread exhibits corresponding characteristic fluorescent colors under specific wavelength excitation, and the fluorescent hue forms a fixed matching relationship with the fiber fineness and cut length. This constructs a multi-scale composite anti-counterfeiting system of "fluorescent characteristics + fineness + length," forming a difficult-to-counterfeit anti-counterfeiting code.

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