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Laser marking polymers - comprises adding, before irradiation, silicate having strong absorption for energy of the wavelength of laser beam
Laser marking polymers - comprises adding, before irradiation, silicate having strong absorption for energy of the wavelength of laser beam
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机译：激光打标聚合物-包括在辐照前添加对激光束波长的能量具有强吸收性的硅酸盐
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摘要
In a process of marking a polymer by irradiation with a laser beam, the polymer is modified before irradiation to increase its absorption of energy of the wavelength of the laser beam. Also claimed is a polymer which normally has a low absorption in the infra-red range of wavelengths, adapted for marking by irradiation with a carbon dioxide laser beam of 10.6 u wavelength by incorporation of an additive having a high absorption at the wavelength of 10.6 microns. Used for containers esp. for packaging foodstuffs, can be marked with information using laser coding systems.
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