MEMBER’S QUESTION:

I am asked quite often for documents and specifications for the glue lap specifications for corrugated boxes. We typically provide a contact or non-contact system that will apply 90-100% coverage depending upon the size of the tab. I have researched and really have not found anything worthwhile. Do you have any specifications or could you lead me in the right direction? I believe the most common questions we are asked is what are the specifications for glue coverage on a typical tab 1.25” width, 1.50” width, 1.75” and 2”.

ASKRALPH RESPONDS:

I just returned from the summer 2008 TAPPI CORBOTEC meeting where my network associates from across the industry were present. Item 222 and Rule 41 as reproduced in the Fibre Box Handbook state that there must be 100 percent adhesive coverage on the glue tab.  Their response seem rather black and white to me.  Many other technical members did say that they use a glue wheel instead of an eight opening extrusion head.