FEA 646 Filled aerosol packs – Resistance to a top load force

During product pack development, sample aerosols can be subjected to a top loading test to check that the calculated maximum theoretical static load will not lead to cap failure with resultant accidental actuation. This standard describes such a test method which can be used for a pre-check of prototypes before further tests are performed as required under the dangerous goods legislation.

FEA 648 Aerosol valve diptubes – Measurement of (a) diptube length, (b) diptube growth and (c) diptube curvature

The diptube is a vital component of an aerosol valve. Selecting and measuring the length and curvature of the diptube is critical to the correct functioning of an aerosol product.

Too long a diptube can lead to failure to spray (and aerosol manufacturing problems during placing and clinching the valve), too short a diptube can result in failure to evacuate the declared contents fully and excessive (or indeed absence of) curvature can lead to aerosol manufacturing problems placing the valve into the container opening.

The aerosol formulation (product and propellant) can cause diptube growth so this effect must be known and be factored into the determination of the appropriate diptube length specification. This change will normally reach equilibrium during the first 24 hours after filling.

This standard defines the method to
(a)  measure diptube length,
(b)  determine the effect of the product on diptube growth and
(c)  measure the degree of diptube curvature.

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