[article]
| Titre : |
Controlling VOC emissions from silicone-based coatings : For processes such as tape manufacturing, a recuperative thermal oxidizer specially designed for high levels of silicone may be most effective |
| Type de document : |
texte imprimé |
| Auteurs : |
Stephen H. Klostermeyer, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 16-19 |
| Langues : |
Américain (ame) |
| Catégories : |
Adhésifs sensibles à la pression
Atmosphère -- Pollution -- Lutte contre
Composés organiques volatils -- Oxydation
Composés organiques volatils -- Toxicologie
Oxydation thermique
Rubans adhésifs
SiliconesLes silicones, ou polysiloxanes, sont des composés inorganiques formés d'une chaine silicium-oxygène (...-Si-O-Si-O-Si-O-...) sur laquelle des groupes se fixent, sur les atomes de silicium. Certains groupes organiques peuvent être utilisés pour relier entre elles plusieurs de ces chaines (...-Si-O-...). Le type le plus courant est le poly(diméthylsiloxane) linéaire ou PDMS. Le second groupe en importance de matériaux en silicone est celui des résines de silicone, formées par des oligosiloxanes ramifiés ou en forme de cage (wiki).
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| Index. décimale : |
668.3 Adhésifs et produits semblables |
| Résumé : |
Silicone-based coatings are among the most versatile materials used in a variety of industrial applications, including pressure-sensitive tapes, protective coatings, and the protection of printed text on packaging. They are chosen over other materials for their technical and mechanical characteristics, as well as their flexibility. Silicone-based coatings have excellent properties such as strong adhesion to most substrates and high chemical, thermal, UV, and water resistance.
The application of these solvent, silicone-based paints, coatings, and adhesives releases significant levels of volatile organic compounds (VOCs) into the environment. When evaporated during the coating process, these VOCs react with nitrogen oxide (NOx) in the presence of sunlight to form ground-level ozone. As such, they are regulated as ozone precursors under the U.S. Environmental Protection Agency’s criteria pollution program. In sufficient quantities, VOCs can cause adverse effects on human health, including eye, nose, and throat irritations ; headaches ; dizziness ; visual disorders ; and memory impairment.
The web coating and converting industry is a primary user of silicone-based coatings and is therefore faced with many challenges to control these air emissions from the manufacturing process. Web coating or converting involves applying specialized coatings over a variety of substrates or webs, including paper, foil, plastic, film, metal, and wire. The coating process consists of applying a coating material to a moving web of flexible substrate. Different types of coating lines may be found in each application, but broadly speaking, each system is based on a roll design and consists of a metering system for applying the coating material to the substrate, followed by a drying tunnel to dry the coated web before it is rewound. The coatings provide the substrate with enhanced aesthetic and physical properties derived from the coating material. |
| Note de contenu : |
- Understanding thermal oxidation
- Recuperative thermal oxidizers
- Case study : pressure-sensitive tape manufacturer
- Effective air pollution control |
| En ligne : |
https://www.adhesivesmag.com/articles/97714-controlling-voc-emissions-from-silic [...] |
| Format de la ressource électronique : |
Html |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34045 |
in ADHESIVES & SEALANTS INDUSTRY (ASI) > Vol. 27, N° 4 (04/2020) . - p. 16-19
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Controlling VOC emissions from silicone-based coatings in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 27, N° 4 (04/2020)
