It all starts with the operator…

The operator of the crimping tool is critical to a successful seal.  It is important for the operator to keep the crimper aligned as well as possible with the vial.  The operator must also apply down pressure onto the top of the seal during crimping to compress the stopper and allow the aluminum skirt to pass below the bottom of the lip as the jaws close and the plunger actuates.

 

 

 

Skirt lengths…

The length of the aluminum skirt on the cap and irregular trim both contribute to inconsistencies in seal wrap on the underside of the lip.  A higher crimp setting does improve the wrap, however care must be taken to avoid damaging the side wall if over crimped.  The normal variation in the thickness of the vial lips also can contribute to seal damage, especially if the skirt is short or the stopper is not adequately compressed during crimping.

The Key…

In conclusion, the key to good seals is to always apply downward pressure while crimping the cap on the vial, and caps with slightly longer skirt lengths will provide more consistent crimps.

 

For questions, please contact us at Sales@ChromRes.com or 502.491.6300.

 

Shop Crimpers HERE.