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Difference between revisions of "Coating and lamination"
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=== Origin and composition === | === Origin and composition === | ||
Coating and lamination are secondary processes where different kinds of coatings like paints or laminates are used. | Coating and lamination are secondary processes where different kinds of coatings like paints or laminates are used. In the focus of this page are coatings and laminates that are derived from biogenic origin and can - at least in the future - be derived from biowaste. This includes mainly organic materials that contain oils and polymers. | ||
In the focus of this page are coatings and laminates that are derived from biogenic origin and can - at least in the future - be derived from biowaste. This includes mainly organic materials that contain oils | |||
==== Bio-based polymers/epoxy resins ==== | |||
Bio-based polymers can be derived from biomass, from bio-derived monomers achieved by fermentation, or through polymer synthesis by micro-organisms. The following polymers are applied as coatings and/or lamination: | |||
* Polysaccharides (e.g., starch and cellulose derivatives, chitosan, and alginates) | * Polysaccharides (e.g., starch and cellulose derivatives, chitosan, and alginates) | ||
* Proteins (e.g., casein, whey, collagen, soya, and gluten) | * Proteins (e.g., casein, whey, collagen, soya, and gluten) | ||
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* Polyesters (e.g., PHA and PLA) | * Polyesters (e.g., PHA and PLA) | ||
=== Pre-treatment === | |||
== Process and technologies == | |||
=== Application technologies === | === Application technologies === | ||
Depending on the type of coating or | [[File:Extrusion lamination.PNG|thumb|Extrusion lamination detail]] | ||
* | Depending on the type of coating and or application there are different types of processes: | ||
* | *Chemical vapor deposition | ||
* | *Physical vapor deposition | ||
*Chemical and electrochemical techniques (e.g., Conversion coating, Ion beam mixing, and plating) | |||
*Spraying | |||
*Roll-to-roll coating processes (e.g., Roller coating, slot die coating, and extrusion coating) | |||
*Physical coating processes (e.g., spin coating and dip coating) | |||
[[File:Extrusion coating.PNG|thumb|Extrusion coating (or slot die coating) detail]]Extrusion is the most established technique for applying paper coatings and practiced industrially due to several advantages such as, continuous processing, providing uniform coating, minimal chances of pinholes and cracks, and solvent-free application. | |||
== Product == | == Product == | ||
The product is a material surface/substrate with changed surface properties (e.g., increased barrier resistance) and/or improved aesthetics. Coatings based on polymers are used in several applications and industries, namely within aerospace, automotive, marine structures, biomedical devices, decorative stuff, energy items and packaging. | |||
=== Post-treatment === | === Post-treatment === | ||