After some investigation, I would have more concern about the true 'archival' characteristics than about binder durability!
Library of Congress states this about photo storage:
"Materials
Many commercially available enclosures are labeled "archival" or "acid-free". However, some of these same items may contain lignin, dyes, sizing agents, coatings, plasticizers, or other harmful additives. Never use enclosures made from unprocessed woodpulp paper, glassine, or polyvinyl chloride (PVC) to house or store photographs."
Yet in all of the dozen or so 'archival biner' products that I read product descriptions, only ONE mentioned the nature of the carboard used (acid fee) and NONE mentioned the nature of the plastic binder material! Most ordinary binders are made from PVC, which outgasses to attach organic dyes, Unadressed in the product descriptions:
- Are 'archival' binders made from polyethelene rather than PVC?! dunno.
- And while cardboard may be 'acid free', do they contain Lignin, which also outgasses fumes which attack organic dyes?! dunno
Sadly, the warnings posted in decades past have disappeared from the internet...warnings are harder to find. What we do not know will not harm us, right?! no.
I know from first hand experience what vinyl sheet protectors can do to photocopies (the image sticks and transfers to the sleeve) and to dye sublimation prints produced by a Sony medical printer (resulting in fade/color shift). That was only after testing done due to a Kodak tech bulletin I had read in the 1980's, leading to my tests.