The Primary Function of Secure Seal Tester is to seal the container
• lined closure
• linerless closure
• A LINED closure is one that has a paper, plastic, metal foil, plastic film or combination liner. Dispensing closures are sometimes lined and other types of usually unlined closures are sometimes lined for different reasons.
• A LINERLESS closure which provides an effective seal because it has some sort of anti-leaking feature molded into the inside top of the cap against oxygen penetration and moisture evaporation with an inner annular member defining an annular outwardly directed sealing circumference which forms a line seal with the inner cylindrical surface of a container wall and an outer annular member defining an annular inwardly directed sealing circumference which seals against the outer cylindrical surface of a container wall.
This test method exists how well do they work together for measuring a variety of closure attributes of the closure/ bottle systems which are designed with many different styles and features:
• Continuous Thread (CT) i.e. a regular screw cap with a continuous thread.
• Child Resistant Closure (CRC) i.e. which may be of a single piece or two piece design. If a two piece CRC, it usually has a CT inner cap with the palm or pushes down and turns outer shell.
• Snap Cap i.e. in PE milk bottles
• Dispensing (water bottles, dish washing soaps) i.e. are those that via a pull/push, spout, twist, or flip top allow products to be dispensed. It is usually linerless closures with some sort of sealing mechanism such as: crabs claw, valve seal, land seal or some combination of the seals, but not always.
• Hinged dispensing i.e. in ketchup bottles
• Hybrid plastic threaded ring with metal insert i.e. in peanuts, sauces
Thus, the Secure Seal Test (SST) Closure/finish assemblies are cut from bottles or containers and pressurized to measures the ability of the closure/finish seal to hold pressure, providing a measure of how well the closure seals to the finish. For more information visit http://www.testing-