chemicallytechFine Chemical TechnologiesТонкие химические технологии2410-65932686-7575MIREA – Russian Technological University (RTU MIREA).10.32362/2410-6593-2022-17-4-346-356chemicallytech-1862Research ArticleSYNTHESIS AND PROCESSING OF POLYMERS AND POLYMERIC COMPOSITESСИНТЕЗ И ПЕРЕРАБОТКА ПОЛИМЕРОВ И КОМПОЗИТОВ НА ИХ ОСНОВЕMethod for hidden marking of transparent polypropylene filmСкрытая маркировка прозрачной пленки полипропиленаНиколаевА. А.NikolaevA. A.

Николаев Александр Африканович, преподаватель кафедры «Инновационные материалы принтмедиаиндустрии», Полиграфический институт

127008, Москва, ул. Большая Семеновская, д. 38

SPIN-код РИНЦ 8146-7143

Alexander A. Nikolaev, Lecturer, Department of Innovative Materials of the Print Media Industry

38, Bolshaya Semenovskaya ul., Moscow, 127008

RSCI SPINcode 8146-7143

nikolaevaleksandr1992@gmail.comhttps://orcid.org/0000-0001-6118-0808КондратовА. П.KondratovA. P.

Кондратов Александр Петрович, д.т.н., профессор кафедры «Инновационные материалы принтмедиаиндустрии», Полиграфический институт

127008, Москва, ул. Большая Семеновская, д. 38

Scopus Author ID 6603924314

SPIN-код РИНЦ 8689-3888

Alexander P. Kondratov, Dr. Sci. (Eng.), Professor, Department of Innovative Materials of the Print Media Industry

38, Bolshaya Semenovskaya ul., Moscow, 127008

Scopus Author ID 6603924314

RSCI SPIN-code 8689-3888

apkrezerv@mail.ruМосковский политехнический университетРоссияMoscow Polytechnic UniversityRussian Federation202230092022174346356Copyright © Nikolaev A.A., Kondratov A.P., 20222022Николаев А.А., Кондратов А.П.Nikolaev A.A., Kondratov A.P.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.finechem-mirea.ru/jour/article/view/1862

Objectives. To quantitatively describe the thermochromic properties of films of isotactic polypropylene, a large-tonnage polymer widely used in the production of flexible packaging for goods and foodstuffs, as well as substantiate the possibility of covert labeling of transparent packaging.Methods. Differential scanning calorimetry, polarization photometry, infrared Fourier spectrometry, gravimetry, temperature control, physical and mechanical strength testing.Results. The identified thermochromic effect of dichroism in polarized light on industrial samples of transparent biaxially oriented film of isotactic polypropylene was studied. A change in the phase composition of the film-forming composition during short-term heating during marking was established. The absence of heat shrinkage and change in transparency in non-polarized light was shown, which provides the possibility of hidden recording of information and its contrast manifestation in a passing light stream at a certain arrangement of light filters.Conclusions. The causes and optimal conditions of the thermochromic effect are established. It is proposed to use local contact heat treatment of a polypropylene film for covert recording of information and marking of product packaging in order to protect against counterfeiting.

Цели. Количественно описать термохромные свойства пленок изотактического полипропилена – крупнотоннажного полимера, широко используемого в производстве гибкой упаковки товаров и продуктов питания, и обосновать возможности скрытой маркировки прозрачной упаковки.Методы. Дифференциальная сканирующая калориметрия, поляризационная фотометрия, ИК Фурье-спектрометрия, гравиметрия, термостатирование, физико-механические испытания, в том числе прочности.Результаты. Обнаружен и исследован термохромный эффект дихроизма в поляризованном свете на промышленных образцах прозрачной двуосноориентированной пленки изотактического полипропилена. Установлено изменение фазового состава пленкообразующей композиции в процессе кратковременного нагревания при маркировке. Показано отсутствие термоусадки и изменения прозрачности в неполяризованном свете, обеспечивающее возможность скрытой записи информации и ее контрастного проявления в проходящем потоке света при определенном расположении светофильтров.Выводы. Установлены причины и оптимальные условия термохромного эффекта. Предложено использовать локальную контактную термообработку пленки полипропилена для скрытой записи информации и маркировки упаковки товаров и продуктов с целью защиты от подделок.

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The authors declare that there are no conflicts of interest present.