Question

Draw a well labelled diagram of aerosol container and state method of aerosol packaging. 

Answer 1

Diagram of aerosol container :

Depending on the nature of the product concentrate the aerosol can be filed by cold filling or pressure filling process

 1) Cold-filling fill process:-

i) This process to fill metered aerosol products using a fluorocarbon propellant.

ii) By lowering the temperature of a propellant below its boiling point, the propellant becomes liquid at atmospheric pressure.

iii) The active ingredients or concentrate & propellant are cooled to a low temperature of about- 30^o to- 40^o f.

iv) The concentrate is generally cooled to below 0^oc in order to reduce loss of propellant

v) During the filing operation the chilled concentrate is poured into the chilled container & propellant is added.

vi) Sufficient time is given for the propellant to partially vaporize, in order to expel the air present in the container.

2) Pressure- fill process:-

i) This process is used for filling aerosol containing hydrocarbon propellant.

ii) The product concentrate is placed into the container & the valve is sealed.

iii) The propellant is forced through the valve under pressure.

iv) After this the container is immersed in a water bath at 130^o F. in order to check any leakage & strength of the container.

v) It is essential that the air present in the container must be expelled before filing the contents in to the aerosol container.