Barrier technology - Prevention of defects in barrier films - Some solutions to avoid defects in coatings
7 important questions on Barrier technology - Prevention of defects in barrier films - Some solutions to avoid defects in coatings
What are solutions to avoid defects in coatings?
- Applying thick coatings
- Using emulsions
- Applying multiple layers of the same material
- Application of a combination of a low and high permeable film
- Curing
What are 3 disadvantages of applying a thicker layer to make a film defect free?
- One needs a lot of coating material, may be expensive
- It may influence the taste and visual appearance, as well as the tactile and olfactory characteristics of the product
- A thick coating may need a complex application process: the conditions need to be such that the coating material is not drained from the product, in the time it needs to solidify.
How are the speed of drainage and the thickness of the film related?
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What is the benefit of applying multiple layers of the same material to avoid defects in coatings?
What is a disadvantage of applying multiple layers of the same material to avoid defects in coatings?
- The total barrier may still be rather thick, which has similar implications for consumer perception as for the application of one thick coating.
- The costs: 5 layers of coating and solidification process steps and the related additional processing time
How can curing avoid defects in coatings?
What is a disadvantage of using curing to avoid defects in coatings?
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