Sorbitan esters are a class of emulsifiers and anti-static agents derived from sorbitol and fatty acids. These esters are widely used in the plastic, coating, and personal care industries for their ability to improve surface properties and stability. Sorbitan esters work by reducing friction, preventing static build-up, and improving the dispersion of materials in formulations.
| Property | Typical Value |
|---|---|
| Appearance | Yellow to brown liquid or paste |
| Active Content | ≥ 90% |
| Viscosity (at 25°C) | 100 – 400 cps |
| pH Value | 6.5 – 7.5 |
| Flash Point | 160 °C (min) |
| Challenge | Sorbitan Esters Solution |
|---|---|
| High friction between polymer layers | Reduces surface friction and enhances flow |
| Electrostatic accumulation in films | Prevents static charge build-up |
| Inconsistent dispersion of fillers | Improves dispersion and stability |
| Poor surface gloss and finish | Enhances smoothness and surface quality |
Q1: Are sorbitan esters suitable for food packaging applications?
Yes, food-grade sorbitan esters are available and comply with FDA and EU standards.
Q2: How is sorbitan ester typically used?
Typical usage is 0.3% – 1.0% depending on the formulation and desired effect.
Q3: Does sorbitan ester affect the transparency of films?
No, it does not significantly affect film transparency or clarity.
