Anti-counterfeiting yarn and preparation method thereof
AssigneeTechid Limited
InventorsKwok Keung Chan, Chun Yu Yeung, Chin Ho So
Life of this patent
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Abstract
An anti-counterfeiting yarn includes a uniformly distributed up-conversion fluorescent material and a polymer, wherein the up-conversion fluorescent material comprises a maximum weight percent of about 1.8%. A method of preparing an anti-counterfeiting yarn includes mixing functional polymer chips containing up-conversion fluorescent material with polymer chips not containing up-conversion fluorescent material in a ratio such that the fluorescent material is uniformly distributed in the mixture, melting the mixture, extruding the melt into filaments, and producing anti-counterfeiting yarn through spinning and drawing the filaments.
Claims8
A method of preparing an anti-counterfeiting yarn, comprising:
- providing an up-conversion fluorescent material in a powder form having a particle size of about 0.3-7 μm;
- mixing the up-conversion fluorescent material with a molten polymer material to form a composite material;
- cooling the composite material, followed by cutting to provide a functional polymer chip (FPC);
- mixing the FPC with a polymer chip not containing the up-conversion fluorescent material in a ratio such that the fluorescent material is uniformly distributed in the mixture, followed by melting the mixture;
- extruding the melt of the FPC and the polymer chip not containing the up-conversion fluorescent material into filaments;
- and
- producing the anti-counterfeiting yarn through spinning and drawing the filaments, wherein the up-conversion fluorescent in the anti-counterfeiting yarn comprises a maximum weight percent of about 1.8%.
Dependencies are inferred from the claim text.