| Titre : |
Formulating strategies for low migration and low odour products |
| Type de document : |
texte imprimé |
| Auteurs : |
Susan E. Bailey, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 14-15 |
| Langues : |
Anglais (eng) |
| Catégories : |
Emballages
Monomères
Oligomères
Photoamorceurs (chimie)
Revêtements -- Séchage sous rayonnement électronique
Revêtements -- Séchage sous rayonnement ultraviolet
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
How radiation curing, both ultraviolet (UV) and electron beam (EB), can provide printed packaging with desired final properties without the bulk removal of solvent or water from a liquid formulation that forms a final coating product.
In the radiation curing process, UV light waves or high energy electrons impinge on the components of the formulated coating or ink to initiate the chemical reactions that form a crosslinked network of bonds between the components. Any components that do not react to incorporate into the polymer network are trapped within it ; however, they have the potential to migrate from the coating with exposure to heat, contact with similar materials or over time. Even though these components are minute constituents of the final film, they can migrate causing odour and impacting the coating performance. In certain applications,chemicals that can be released are regulated and need to be strictly controlled.
Figure 1 depicts a schematic of the liquid formulation containing monomers, oligomers and photoinitiator. After the cure reaction, many of the components are chemically bound. Residual monomer and photoinitiator molecules can remain unbound in the coating. Reactive end groups may still be present but bound to the polymer network through a different end of the molecule.
The strategies employed to create the desired look or performance of the coating or ink can often be in conflict with strategies to control the migration of materials in the final product. Considered selection of formulation components and the radiation curing system allow for both parts of the final product specification to be maintained. |
| Note de contenu : |
- Photoinitiator considerations
- Monomer/oligomer selection
- Contributing factors
- Flexibility solution
- Balancing formulation |
| En ligne : |
https://drive.google.com/file/d/17YLrkbG6BsFu5WV3AVorWzixrxTlBjE0/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22372 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 204, N° 4602 (11/2014) . - p. 14-15
Aller sur edunet
Accueil
Formulating strategies for low migration and low odour products in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4602 (11/2014)
