Seal Integrity: Conductivity Leak Test
| Sample Type | Required Quantity | Equipment Used |
| Bottles | 24 |
Instron 4411 |
Purpose
This test determines the seal integrity and 'E' dimensions of a hot fill
container.
Description
The max and min 'E' dimensions are measured for 24 bottles. The sealing
surface of twelve bottles is scored using the Instron to evenly score
the entire surface. All 24 bottles are then hot filled at a specified
temperature and capped with closures that have been soaked in 130°F
water to soften them. The bottles are individually inverted into a pool
of salt water. The bottles are checked for seal integrity by determining
if current flows between the submerged top of the bottle and a pool of
salt water using an ohm-meter. If the bottle does not leak, up to 3.0
psi pressure may be applied to the bottle by squeezing it to determine
whether the closure leaks under slight pressure. The post testing 'E'
dimensions are then measured.
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