Bottle Cap Torque Range

Bottle Cap Torque Range

Torque is the rotational force applied during cap application or removal from a container. When applying a closure to a container it is important to utilize the correct amount of torque to ensure a proper seal. Ideally, torque should be evenly distributed throughout the closure.

Myth:

The tighter you apply a closure the less likely the chance the product in the container is going to leak.

Fact:

Applying too much pressure to a closure can actually increase the chances of product leakage.

Over-torquing may cause some points on the cap to have more pressure then others, which could result in an improper seal. If the cap is applied with too little torque, the container may leak or the closure could come off too easily.The chart below illustrates the recommended torque to apply or remove closures of a specific size and material. The figures are based on the minimal amount of torque needed to apply or remove a closure. As a general rule, the amount of torque is about half of the diameter of the cap. Torque is expressed in inches per pound.

As always, since packaging variables come into play, be sure to test your specific application to ensure optimal results and safety. The most accurate way to measure torque is with a torque tester.