A coating concept for shrink films / Stefan Schiessl in PLASTICS INSIGHTS, Vol. 113, N° 8 (2023)  

[article]  inPLASTICS INSIGHTS > Vol. 113, N° 8 (2023) . - p. 72-75 Titre : A coating concept for shrink films : New, low-cohesion coatings allow functionalization via covalent bonds Type de document : texte imprimé Auteurs : Stefan Schiessl, Auteur ; Klaus Noller, Auteur Année de publication : 2023 Article en page(s) : p. 72-75 Langues : Anglais (eng) Catégories : Emballages en matières plastiques Films rétractables Laque et laquage Polyéthylène Protection contre le rayonnement ultraviolet Revêtements Surface anti-buée Surfaces (technologie) Surfaces fonctionnelles Traitement rouleau à rouleau Index. décimale : 668.4 Plastiques, vinyles Résumé : The coating of shrink films has so far proven to be challenging because only a few shrinkable coating systems are available. A new family of coating systems that react with the substrate surface and are covalently bonded to it is now expanding the possibilities. UV-protective coatings and coatings with anti-fogging properties have already been successfully applied on a roll-to-roll scale. In theory, though, any type of functionalization can be chosen. Note de contenu : - Two disadvantages of traditional coatings: migration and degradation - Flexible film versus shrink film - New coating systems – a modified stöber synthesis - From laboratory to roll-to-roll trials - Shrink film with uv protection and anti-fogging properties - Fig. 1 : Traditional functionalization layer applied to a PE shrink film before shrinking - Fig. 2 : Schematic illustration of how the new coatings work using a UV-blocking layer for functionalizing shrink film En ligne : https://drive.google.com/file/d/1YDI2EINt_Mdaa0_xbMRYaGqpDpYmXL7J/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40560 [article]

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Constant dripping clouds the film / Bernd Hönig in KUNSTSTOFFE INTERNATIONAL, Vol. 113, N° 2 (2023)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 113, N° 2 (2023) . - p. 60-63 Titre : Constant dripping clouds the film : Anti-fog additives for food packaging and greenhouse films Type de document : texte imprimé Auteurs : Bernd Hönig, Auteur ; Vanessa Harbart, Auteur ; Sabine Fuchs, Auteur Année de publication : 2023 Article en page(s) : p. 60-63 Langues : Anglais (eng) Catégories : Aliments -- Emballages Emballages en matières plastiques Matières plastiques -- Additifs Matières plastiques -- Emploi dans l'agriculture Mélanges-maîtres (chimie) Serres en matières plastiques Surface anti-buée Index. décimale : 668.4 Plastiques, vinyles Résumé : In food packaging and in greenhouses, water often builds up on the polymer films due to its high surface tension. This phenomenon affects both the appearance and function of the films. Anti-fog additives help to optimize the optical properties. In addition, new technologies are intended to increase the service life of the films. Note de contenu : - Attractive packaging, more effective greenhouses - Water film instead of water droplets - Very good properties even after 36 weeks - More than 50 percent improvement in transparency - Table : Overview of migrating anti-fog additives En ligne : https://drive.google.com/file/d/1xObdnHs2tIv8MvR8bmX7EAKiWmeaAXBK/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39339 [article]

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Recent progress in synthesis of antifogging agents and their application to agricultural films : a review / Sicong Ren in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 3 (05/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 3 (05/2018) . - p. 445-455 Titre : Recent progress in synthesis of antifogging agents and their application to agricultural films : a review Type de document : texte imprimé Auteurs : Sicong Ren, Auteur ; Li Wang, Auteur ; Haojie Yu, Auteur ; Muhammad Haroon, Auteur ; Raja Summe Ullah, Auteur ; Fazal Haq, Auteur ; Rizwan Ullah Khan, Auteur ; Shah Fahad, Auteur Année de publication : 2018 Article en page(s) : p. 445-455 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Composés organiques -- Synthèse Essais (technologie) Films plastiques Matières plastiques -- Emploi dans l'agriculture Surface anti-buée Index. décimale : 667.9 Revêtements et enduits Résumé : Antifogging agents are very important for use on agricultural films. Fogging reduces crop yield and causes other negative effects. To overcome fogging problems on agricultural films, several approaches including surface coating and reactive extrusion methods have been used. To date, researchers have designed a variety of agents to prepare antifogging films. The mechanism and rules for the composition of such agents have also been reported. However, reported antifogging films do not exhibit satisfactory results. Therefore, antifogging methods require further improvement. In this review, different preparation methods for antifogging agents and films are summarized, along with the advantages and disadvantages of each method. Moreover, test methods for antifogging performance are introduced. Note de contenu : - ANTIFOGGING AGENTS AND FILMS : Definition of antifogging and its importance in agriculture - Antifogging mechanism - Types of antifogging agent - Methods for preparing antifogging films - TEST METHODS FOR ANTIFOGGING PERFORMANCE : Determining of first-drop time and ten-drop time - Determination of transmittance - Determination of high-temperature duration - FIGURES : 1. Antifogging mechanism of ilms - 2. Structure of fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether - 3. Preparation of antifogging film by physical blending - 4. Procedure for synthesis of gemini stearic acid poly(glycerol ester) - 5. Procedure for synthesis of triethanolamine laurate ester, where R = CH3(CH2)10 - 6. Synthesis of diglycerol-2,9-dihexyldecanedioate - 7. Preparation of PMPC-g-PE and PMPC-g-PP sheets by "grafting from" method using PE-MI and PE-MI press sheets - 8. Schematic of UV-induced graft copolymerization of PEGMA onto plasma-pretreated LDPE film surface - 9. Principle of antifogging test - 10. Performance of uncoated and antifogging polyethylene film - TABLES : 1. Different types of nonionic surfactant and their chemical formula - 2. Graft copolymerization through reaction extrusion using different monomers - 3. Comparison of properties of gemini and traditional surfactant - 4. Light transmittance of antifogging films with monoolein at different concentrations - 5. Accelerated dripping properties of commercial film and LLDPE-g-GMMD films DOI : 10.1007/s11998-018-0051-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-018-0051-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30741 [article]

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Superhydrophobic surfaces : a review on fundamentals, applications, and challenges / Jeya Jeevahan in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 2 (03/2018)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 2 (03/2018) . - p. 231-250 Titre : Superhydrophobic surfaces : a review on fundamentals, applications, and challenges Type de document : texte imprimé Auteurs : Jeya Jeevahan, Auteur ; M. Chandrasekaran, Auteur ; G. Britto Joseph, Auteur ; R. B. Durairaj, Auteur ; G. Mageshwaran, Auteur Année de publication : 2018 Article en page(s) : p. 231-250 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Amphiphobie Angle de contact Anticorrosion Hydrophobie Revêtement auto-nettoyant Revêtements antigel Surface anti-buée Index. décimale : 667.9 Revêtements et enduits Résumé : Superhydrophobicity is the tendency of a surface to repel water drops. A surface is qualified as a superhydrophobic surface only if the surface possesses a high apparent contact angle (>150°), low contact angle hysteresis (<10°), low sliding angle (<5°) and high stability of Cassie model state. Efforts have been made to mimic the superhydrophobicity found in nature (for example, lotus leaf), so that artificial superhydrophobic surfaces could be prepared for a variety of applications. Due to their versatile use in many applications, such as water-resistant surfaces, antifogging surfaces, anti-icing surfaces, anticorrosion surfaces etc., many methods have been developed to fabricate them. In this article, the fundamental principles of superhydrophobicity, some of the recent works in the preparation of superhydrophobic surfaces, their potential applications, and the challenges confronted in their new applications are reviewed and discussed. Note de contenu : - FUNDAMENTALS OF SUPERHYDROPHOBICITY - FABRICATION : Top-down approach - Bottom-up approach - Combined approach - APPLICATIONS DOI : 10.1007/s11998-017-0011-x En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-017-0011-x.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30276 [article]

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Wafer-thin on the film / Markus Kalwar in KUNSTSTOFFE INTERNATIONAL, Vol. 107, N° 4 (04/2017)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 107, N° 4 (04/2017) . - p. 18-21 Titre : Wafer-thin on the film : Effective and energy-saving functionalization of food films Type de document : texte imprimé Auteurs : Markus Kalwar, Auteur ; Katrin Renger, Auteur Année de publication : 2017 Article en page(s) : p. 18-21 Langues : Anglais (eng) Catégories : Aérosols Aliments -- Emballages Emballages en matières plastiques Films plastiques Hydrophilie Matériaux -- Propriétés fonctionnelles Revêtements anti-buée Surface anti-buée Surfaces fonctionnelles Traitement corona Traîtements de surface Index. décimale : 668.4 Plastiques, vinyles Résumé : The Calvasol method provides a flexible, economical, and efficient way to functionalize films with corresponding coatings. Compared to alternative methods, the applied layer thicknesses are in the range of 0.1 to 10 nm which reduces the consumption of chemicals and energy in processing. Note de contenu : - Avoiding high energy consumption for drying - Treatment and coating in one process step - Direct integration into the extrusion process - Further development of functional chemistry - FIGURES : 1. Schematic representation of the Calvasol method that combines the corona treatment and aerosol application. It is used for the permanent andi-adhesion, antifog or antistatic functionalization of films - 2. The aerosols are applied to the film from below. This has the benefit that the functional molecules can be anchored in a very thin and even layer - 3. The Calvasol system can be integrted directly into the lamination process with no negative influence on the lamination adhesive - 4. Measuring the contact angle of a film coated with and without Calvasol shows the influence of the Calvasol antifog function : The goal is to create a surface with maximum hydrophilic properties, indicated by a small contact angle in the measurement with water. The greater the contact angle (image on the right), the poorer the antifog effect En ligne : https://drive.google.com/file/d/13hytvqc7_RbMNMMsWKL1MxA45wqXt11w/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28474 [article]

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