Fogging refers to condensation of water vapor on the surface of a transparent plastic film (due to differences in temperature and humidity between the two sides of the film) in the form of small discrete droplets leading finally to loss of transparency.
In food packaging films, fogging causes loss in content visibility, and therefore in product attractiveness, as well as accelerating product quality deterioration.
In greenhouse films, fogging leads to slower plant growth, and also plant and fruit blemishing due to lens effect or hot water dripping.
Anti-fog additives typically comprise hydrophobic and hydrophilic chemical functional groups in a single molecule. This structural feature allows condensed water to form a transparent layer on the film surface instead of discrete droplets, therefore maintaining transparency. This in turn helps to maintain packaged food visibility and quality, and contributes to plant health in greenhouses.
Product selection from SABO’s anti-fog additives portfolio (including SABOFOG® MS, SABOFOG® ML, SABOFOG® PGS or SABOFOG® F1) enables our customers to design formulations and fine tune the anti-fogging effect according to film characteristics, usage conditions and effect durability.
| Name | Property | Applications |
|---|---|---|
| SABOFOG® F1 |
Acid number – Max. 5 mg KOH/g Appearance (20°C) – Light yellow pastilles Melting range – 38–44°C |
SABOFOG® F1 is an ethoxylated alkylamine ester which is useful as an internal anti-static additive for plastics, especially in PP films and BOPP for food packaging applications. |
| SABOFOG® F1/S |
Acid number – Max. 5 mg KOH/g Appearance (20°C) – Solid Melting range – 38–44°C Melt color (Gardner) – Max. 2.5 |
SABOFOG® F1/S is an ethoxylated alkylamine ester which is useful as an internal anti-static additive for plastics, especially in PP films and BOPP for food packaging applications. |
| SABOFOG® M1 |
Appearance (20°C) – Yellow to amber cloudy liquid Active content (%) – 100% Density – 1.28 g/cm³ |
SABOFOG® M1 is useful as internal additive for greenhouse covers. Mainly suitable for applications where mist can be formed due to unbalanced temperatures between external and internal sides of the greenhouse. |
| SABOFOG® M1 40 EVA |
Appearance (20°C) – Light yellow pastilles Active content (%) – 40–42 Density – 0.37 kg/l |
SABOFOG® M1 40 EVA is a 40% active concentrate of anti-mist additive SABOFOG® M1; it is used as internal additive for greenhouse covers. |
| SABOFOG® ML |
Acid number – Max. 7 mg KOH/g Appearance (20°C) – Amber coloured HLB value – 7.6 Hydroxyl number – 330–358 mg KOH/g Saponification number – 153–170 mg KOH/g |
SABOFOG® ML is a sorbitan ester useful as an internal anti-fog additive for plastics, particularly in thin film food packaging applications, including LDPE, LLDPE, and EVA. It is also effective as an anti-static additive in PVC. |
| SABOFOG® MS P |
Appearance (20°C) – Ivory colored pastilles Acid number – Max. 7 mg KOH/g HLB value – 5.0 Hydroxyl number – 235–260 mg KOH/g Melting range – 50–60°C |
SABOFOG® MS P is a sorbitan ester useful as an internal anti-fog additive for plastics, particularly in greenhouse films, including LDPE, LLDPE, EVA (low VA content), and PVC. |
| SABOFOG® PGL |
Acid number – Max. 2 mg KOH/g Appearance (20°C) – Viscous milky liquid Color Apha (40°C) – Max. 100 Solidification range – −15°C to +10°C |
SABOFOG® PGL is a polyglycerol ester useful as an internal anti-fog additive for plastics, particularly in cold fog packaging films including LDPE, LLDPE, EVA, and PVC. |
| SABOFOG® PGS |
Appearance (20°C) – Yellow to amber pastilles Acid number – Max. 5 mg KOH/g Color (Gardner) – Max. 5 Melting range – 53–57°C |
SABOFOG® PGS is a polyglycerol ester useful as internal anti-fog additive for plastics, particularly in greenhouse films or food packaging films/containers, including PE, EVA, and PVC. |
| SABOFOG® TOE |
Acid number – Max. 2 mg KOH/g Appearance (20°C) – Amber colored liquid Color (Gardner) – Max. 10 HLB value – 11 Hydroxyl number – 30–52 mg KOH/g |
SABOFOG® TOE is an ethoxylated sorbitan ester useful as an internal anti-fog additive for plastics. It is particularly useful in PE films for food packaging applications and in PVC films. |
