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. 2023 Dec 15;13:22329. doi: 10.1038/s41598-023-49897-2

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Heat retention capacity and thermal effusivity of PP films with additives. Change of temperature difference from the initial temperature of films with 2% additives (a) and 4% additives (b) was observed under infrared light for 1 min (0–60 s) and 1 min after infrared light off (60–120 s). (c) Thermal effusivity of PP films with 2% additives at 2 s and 10 s touching time. (d) Films with additives showing increased thermal effusivity with the increase of concentration from 2 to 4%. (e) Films with additives showing decreased thermal effusivity with the increase of concentration from 2 to 4%.