Tuesday 22 May 2012

Torque in pharmaceutical: childproof containers

Childproof closures are a standard safety feature of pharmaceutical containers. Their effectiveness is a critical quality concern for manufacturers of pharmaceutical packaging. These closures (caps) require accurate torque testing. They have to preserve the contents while protecting children from them, and provide accessibility to older but possibly frail persons.

Torque with Top-Load
The Vortex-xt torque tester features a weights tray that is connected by rods to the torque transducer. When loaded, the tray provides the pushdown (top-load) force necessary for simulating the manual compressive force that users apply when opening childproof caps. The platen rotates the container to simulate the user’s twisting of the cap (torque).

The Vortex-xt’s components are a torque-sensing transducer and a motor-driven platen that provides rotational motion at a specifiable speed (1-20 rpm) to a specifiable angle, time, or force (e.g. rotate to 180 degrees; rotate for N seconds or minutes; or stop at 5.5 Nm). Test results can be displayed on the touch screen (interface) attached to the stand (Vortex-xt) or exported via the RS232 port to Mecmesin’s Emperor software running on a computer. Graphing, analysis, and storage of test data are possible on either configuration.

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