THERMAL INDICATOR STICKER WITH GAS-FILLED HOT-MELT MATERIAL FOR CONTROL OF HEATING OF HOT SURFACES AND METHODS OF ITS PRODUCTION (VERSIONS) Russian patent published in 2025 - IPC G01K11/18 G01K11/16 G01K11/06 C09D5/00 

FIELD: measuring.

SUBSTANCE: group of inventions relates to devices for accurate registration of the fact of exceeding one or more threshold temperatures of a hot surface, which are irreversible thermal indicator labels (TIL), and to methods of making such devices. Disclosed TIL includes a flexible base coated on the back side with a permanent adhesive and a release; at least one opaque for at least part of visible light gas-filled hot-melt material (GHMM), made with possibility of irreversible change of transparency when heated above threshold temperature due to melting included in GHMM substance or group of substances; attached to base polymer protective layer, tightly covering surface of GHMM, wherein at least a portion of the protective layer located above the GHMM is transparent to at least a portion of the visible light; it differs from known designs in that GHMM is glued to flexible base and not glued to polymer protective layer. Methods of making such thermal indicators are also disclosed.

EFFECT: group of inventions ensures increased safety of equipment operation due to accurate and reliable detection of the fact that the temperature of hot surfaces has been exceeded.

6 cl, 13 dwg, 9 ex