PL328843A1 - Method of marking paper, plastic materials and inorganic glass - Google Patents

Description

3288 * 3 6

The method of marking paper, plastic masses and inorganic glasses.

The invention relates to a method of marking paper, organic plastics "" "organic glass" to ensure "identification of the source of the product". 'Ui * i »c, iw.

There are known methods of labeling paper made in time.,.,., Riveting or in further 5 stages, such as refinement, lamination, prints in *, the same is done when marking plastic products and glass, many /. these methods are based on the introduction of phosphors detectable in ultraviolet and infrared, From specialist literature and patents, phosphors are known that use the phenomenon of stokes luminescence of rare earth ions embedded in matrices of inorganic compounds H). is the length of the exciting light.

It has been found that there exists a new group of rare earth compounds exhibiting both Slokes and anti-Stokes emission, tan, such that observes s and f emission of light with a wavelength shorter than the excitation wavelength. That is, m under the influence of (5 laser illumination, simultaneous Slokesian and anti-Tystokes emissions are observed.

The invention relates to a method of marking paper, plastic mm and inorganic glass by adding during their manufacture, in whole or in some places, substances containing the marker. Substances doped with rare earth ions, showing both Slokes and anti-Fokes emissions, preferably Vh, Er, Ho, 20 or Tm, showing both infrared Slokes emissions and anti-Stokes emissions in the infrared and anti-Stokes emissions in the visible range under the influence of a laser with a wavelength of 0.94, are added to the tag. - 1.05 μιη.

The invention relates to a method of labeling materials by using phosphors in which the matrices are fluorides, preferably Al 'or ΚΥίι or UYF', doped with rare earth ions, preferably Yb and / or Er; Vb and / or Ho; Yb and / or Dy; Yb and / or Sm or Yb and / Iub Tm. 5 Fluoride compounds as matrices have additional advantages, such as resistance to high temperatures (even up to 800 ° C) and aggressive chemical environment (acids, bases). Such materials can be added as components directly to paper, plastic or glass and some of its places in the form of other materials soaked in phosphors - paper strips (confetti), cloth, plastic, TFD glass. lii

Examples of phosphors: 1, 1,3 Ej: Tm, Yb ,; 2. KYF4: Tm, Yb; 3. KYFjtTm; 4. NaYF4: Ttn, ¥ b; 5. NaYFątTm 6, IJYKóEr, Yb; 7, LiYF4; Vb, Ho; 8. LiYF4: Yb, Dy; 9. LiYF4: Yb, Sm; I®, LiYF4: Sm; 11. LiYF4: Pr? 12. 1.aF,: Yb, wo; 25

Claims (2)

, ί Examples: Example I To the mass of «-sugar (whole or locally), after the ** · * bleaching proc ** · * bleaching is added as a LiF} marker: Tm as a result of which a paper with decay and anti $ toke $ is obtained ow $ angle < whole or locally. Example 2. Sif strips of another material containing the KYK4 marker are added to the plastic: Vb, Tm · Luminescence of the rare earth ions depends on the concentration of active ions. Slight change in the concentration of e.g. Er ions in matrices containing Yb ions radical reduction or increase of emission, changes in the shape of the bands emission. For this reason, it is possible to accurately identify the source of phosphors production with optical methods. Therefore, it is possible to accurately identify the material by methods. • 5