Tween is a type of nonionic surfactant, which is a hydrophilic emulsifier. As a emulsifier,
it is full of diverse fatty acid, due to the HLB value is 9.6 to 16.7, it can be dispersed
in water, alcohol and other organic solvents, as a result, Tween is a quite useful
emulsifier in many fields, such as food, cosmetic, textile, etc.
The seriers including:
Tween-20, Tween-40, Tween-60, Tween65, Tween-80, Tween-85.