The following is a glossary of terms and abbreviations in closure design and testing.
|A safety closure designed to prevent refilling of the bottle. Usually by a one-way valve mechanism, typically for the alcoholic beverages and spirits industries.
|The torque required to securely attach a rotationally operated closure to its container. This is usually the minimum value to provide a proper seal and still permit acceptable ease of removal.
|Loss of torque once the closure has been applied, caused by the closure physically rotating back from its applied position. This can be caused by design factors or in-service conditions such as liner material properties or top-loading.
|Static torque required to initiate a closure moving in relation to a container.
|Torque required to break bridge segments joining a cap and a tamper-evident band.
|An alternative term for mandrel.
|(or foil) The protective sleeve covering a wine bottle cork. Usually tin or heat-shrink plastic (polyethylene or PVC), or aluminium or polylaminate aluminium. Originally, but no longer made of lead.
|Gas escape from a cap seal or thread.
|ISO 7322 2014 composition cork test standard.
|Child-Resistant Closure (CRC)
|A closure usually featuring a dual or simultaneous action, to resist simple pull or twist removal.
|Crimped-on metal cap; may be lever-off or twist-off.
|Cap featuring a two-position rocking disc with inner stopper, to expose a dispensing orifice.
|The container region that engages with the closure, also ‘neck finish’ phrase used in some test standards.
|flip-top (flip cap)
|Hinged cap with integral stopper.
|This test is used to measure the removal torque of a cap and then reapply the cap to a specific position beyond the original starting position. This test is designed to be a non-destructive test, and prevent leaking problems by reapplying the cap to a secure position.
|Method of fusing a layer to the top of the finish of a container, to effect a seal.
|Inert layer integral to a cap, to effect a non-contaminating seal.
|Cap with a small number of lugs engaging an equivalent number of short threads on a container.
|Device fitting the profile of a closure to enable circumferential gripping without deformation.
|Another term for strip torque.
|Additional resistance to removal other than due to pristine closure contact surfaces.
|Typical proxy for application torque, measures breakaway and initial running torque.
|Ability to run a test to identical parameters.
|Ability to produce the same results.
|Required after induction sealing process (torqued to seat on the seal).
|reverse ratchet torque
|Torque to turn a two-part CRC without internal engagement of the two parts.
|Roll-on pilfer proof (e.g. Stelvin wine cap).
|Roll-on tamper evident: ROPP with an additional plastic reveal band. Also used to combat counterfeiting.
|Dynamic torque required to maintain rotation.
|Another term for breakaway torque.
|Torque required to over-tighten a screw cap and over-ride the thread.
|Part of a closure that breaks away on first opening to indicate that a container has been opened.
|Simple features to inhibit opening (e.g. a label or tape over a join).
|Crown cork cap - note also now available as a twist off.
|Parasitic torque caused by spilled contents on the thread drying and causing adhesion.
|Turning force causing rotation about an axis.
|Axial force to cause engagement between two-part CRCs.
|Another term for cap liner.