DensGlass and the Fiberglass-Mat Bonding Problem
Paperless boards rewrite the bonding chemistry. Here is the surface that matters.
Replace the paper facing with a fiberglass mat and the migratory starch system you built over twenty years stops working. Starch needs cellulose to hydrogen-bond against. Glass mat does not provide it. Georgia-Pacific's DensGlass family solves the bond with a different chemistry stack — typically a thermoset latex binder on the mat itself plus a modified slurry surface chemistry that wets the mat. Public patents around the program describe coupling agents and modified silica systems at the mat-core interface.
If you are evaluating a paperless line, your additive package needs to be specified from a clean sheet. Most starch-based bond builders are simply inappropriate. Talk to us before you commission.