| Plastics & Rubbers - Anti-fogging additives |
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The term 'fogging' refers to the condensation of small water droplets on the surface of a transparent film.
The main adverse effect of fog on agricultural films is the attenuation of light transmission, leading to a reduction in plant growth.
Fog is also undesirable on food packaging films because it affects the visual attractiveness of the product to the potential buyer.
Typical anti-fogging agents are non-ionic surfactants that enhance the polymer wettability and reduce the contact angle between the water droplets and the film surface.
Glycerol monooleate (GMO) is one of the most popular anti-fogging agents because it is cheap and food compatible. However, its effectiveness is limited and not always consistent.
Diglycerol and Polyglycerol-3 fatty acid esters are good substitutes for GMO. They are more hydrophilic, less volatile and more stable to degradation than the equivalent glycerides. They exhibit excellent anti-fogging properties in various polymer matrices, including polyolefins and PVC.
Polyglycerols esters demonstrate superior antifogging properties for films (848 KB)
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Polyglycerols for Ester Production (268 KB)
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Polyglycerols in Industrial Applications (600 KB)
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Diglycerol
A distilled product (min. 90% purity) with unique properties.
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Polyglycerol-3
A polyglycerol characterized by a very narrow oligomer distribution centered on triglycerol.
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