MEMBERS QUESTION:

 

I am trying to ascertain the industry standards for determining the effect of humidity on corrugate stored over various periods of time. Can you direct me to a source or provide information that would guide us in this endeavor? We have a client that is going to store corrugate for three to four months in a new facility. The facility is in a little valley area known for its humidity. I have asked them to start monitoring humidity levels and keep baseline data for my office.

 

I have some basic information on humidity effecting corrugated but I need to be in a position to answer any and all questions.

 

ASK RALPH RESPONSES: I have attached page 3.13 from the Fibre Box Handbook.  It gives compression strength losses resulting from relative humidity on loaded boxes.  This does not apply to KD boxes that are nor filled.  You only minor concern could be with RHs above 85% during the night and then significantly lower readings during the day.  Some of this hydoexpansivity and drying our of the fibre bonds within the corrugated components is defendant on the quality of the fibres themselves, the papermaking process and the corrugated process themselves.  Any given corrugated structure can be engineered to withstand the RH factors if they are known at the time of manufacture.

 

How’s that for a simple answer?

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Humidity Effect on Corrugated.pdf	107.66 KB