科研之友
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摘要
An anti-counterfeiting fiber with spectral fingerprint characteristics (named spectrum-fingerprint fiber) is a novel functional fiber made of rare-earth luminescent material and fiber-forming polymer, as main raw materials, combined with transparent inorganic pigments and functional additives by a melt-spinning process. In order to explain more about the security principle of the fiber, several kinds of spectrum-fingerprint fibers were prepared by using rare-earth strontium aluminate as the rare-earth luminescent material and fiber-forming polymers such as PET, PP and PA6 as a matrix and combining them with transparent inorganic pigments and functional additives to study their emission spectra characteristics. The results showed that the spectrum-fingerprint fibers, made by different spinning raw material formulas or technological parameters including the kind and content of rare-earth luminescent material, polymer, transparent inorganic pigment, and draw ratio, had different emission spectra when excited with a specific exciting light, and any change of these manufacturing elements could cause a fluctuation in the intensity or wavelength of the fiber. Therefore, the emission spectral line of the spectrum-fingerprint fiber, based on the confidential raw material formulas of spinning and rare-earth luminescent material and spinning technological parameters exclusively designed by a manufacturer, is specific, just like the fingerprint of a human being - hard to decipher and counterfeit - and this can be used to distinguish the original from the fake.
- 出版日期2011
- 单位江南大学
