Authors propose a new method of information recording in the form of a relief on the surface of a membrane or film made of the thermo shrinkable polyvinyl chloride. The information is recorded with the help of printing equipment. The printing equipment should undergo partial modification to increase contact time of the film with liquid ink on a printing plate. The ink contains certain ingredients that quickly dissolve the film and reduce local internal compressive stresses in the contact zone. The paper represents the shape and size of the relief elements formed on a membrane made of the thermo shrinkable polyvinyl chloride using screen printing with the ink containing a solvent – tetrahydrofuran.

Partial dissolution and plasticization are used for recording, storing, and reproducing information with modified industrial screen-printing equipment and aqueous solutions of colorless organic liquids on small surface area shape memory polymer films. To justify the choice of “ink” and evaluate the effectiveness of using organic liquids as high-speed polymer solvents, the new method for recording hidden information uses the calculation of the solubility parameter, differential scanning calorimetry, and the method of one-sided swelling of films under isometric conditions. Using the example of tactile marking of shrink labels made of polyvinyl chloride, the optimal conditions for recording hidden information on a film are established in terms of the concentration of an aqueous solution of tetrahydrofuran, the contact time, and the processing temperature of the polymer using screen printing equipment.

An anisotropic copolymer film of vinyl chloride and vinyl acetate, which has shape memory properties, was investigated by the molecular probe method, thermomechanical analysis, and scanning calorimetry. It was found that the amorphous‐crystalline structure and the stress–strain state of the surface layer of the film differ from the structure and state of the inner layers. The molecular probe (limited diffusion of a solvent into the surface layer of the film) revealed the localization of the elastic deformation energy of a film, which was rapidly cooled in a stressed state during production. It is shown that destroying/crushing the stressed macrostructure of the film surface via plasticization and dissolution of the copolymer, eliminates the effects of the elastic energy release during thermally stimulated shrinkage.

Abstract. The article explains a new method of relief marking of heat-shrinkable tubing and sleeves made of polymer materials with "shape memory effect." Method of instrument evaluation of relief marking stereometry of installation parts for aviation equipment, made of polyvinyl chloride, polyethyleneterephthalate and polystyrene was developed and the results were explained. Parameters of pin-point relief marking and compliance of point forms to the Braille font standard were determined with the use of the non-destructive method based on the color of interference pattern with precision of 0.02 mm.

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