I work for a beverage manufacturing company and since the start of the year 2008 we have been having removal torgue problems on our 500ml pack sizes (ready to drink and bottled water). these closures are of two types blue for water and yellow for the ready to drink. we use Rotary cappers. upon consulting the supplier of the closures he said it cld be the material used for the closure liners. we use two piece closures. how do we isolate the chief cause of the high removal torques.....

I work for a beverage manufacturing company and since the start of the year 2008 we have been having removal torgue problems on our 500ml pack sizes (ready to drink and bottled water). these closures are of two types blue for water and yellow for the ready to drink. we use Rotary cappers. upon consulting the supplier of the closures he said it cld be the material used for the closure liners. we use two piece closures. how do we isolate the chief cause of the high removal torques.....

What changed?

More details please:

Is it all bottles off all torque heads?
Have you looked at the application torque?
Is the material inside the torque head that contacts the cap worn?
Have you seen any instances of broken caps coming of the machine(s) in question?
And how long after capping are you taking the removal torque measurement?
Are you allowing time to back off?
Have you checked bottle neck and cap thread dimensions?

and what do you mean by "two piece closure" - a cap with a tamper ring? A flip top? A pull off cover on a cap?

our closures are screw type closures with a tap off ring. both closures have a rubber lining inside. for the blue closures these are non-pvc whilst for the yellow closures. i came across a fish-bone diagram and will post it after i scan it. the manufacturer replied to our queries and said he had used an alternative material for the rubber lining. presently we are to do trials with a batch that has the old material lining. thanx a lot

More details please:

Is it all bottles off all torque heads?
Have you looked at the application torque?
Is the material inside the torque head that contacts the cap worn?
Have you seen any instances of broken caps coming of the machine(s) in question?
And how long after capping are you taking the removal torque measurement?
Are you allowing time to back off?
Have you checked bottle neck and cap thread dimensions?

and what do you mean by "two piece closure" - a cap with a tamper ring? A flip top? A pull off cover on a cap?


forgive me for going silent. the closure is a screw type with a tamper ring. application torque is a problem as we cant seem to set all the heads to the same application torque. torque is monitored hourly after shrinkwrapping. Closures are reported to be made from PP with a non-PVC rubber liner inside.

when i looked to wat has changed its mostly the bottle preforms. only quite recently did i get to kno that one of our suppliers hadnt been approved to supply us by our parent company, the chief culprit was preforms with a poor neck finish. we are unable to carry out profile tests on these preforms due to lack of equipment but any suitable method would be helpful.

Hi, I know that this is an old thread however have you sorted out the issue yet?

The high removal Torque was resolved. At present we have changed the type of closures. We now mostly use one-piece type of closures. These no longer have the rubber lining inside. We still have problems with inconsistent torque measurements. We set our application torque but the variations when we are running tends to be too big. The Machine we use is manufactured by AVE Industries maybe come of you have experience with these machines.