This I do not know. Even regular acrylic tends to craze from alcohol and I believe that this is a modified acrylic. Hold on, I can do a short term test right now…
Okay, after a two minute soak and then a two minute wait, it shows no change in ductileness or other changes.
I have discovered that the space between the lid and front door (or under the front door?) may just work if the material is thin and flexible enough. I had some heavy nylon duck that I had trouble sticking through the passthrough, but did not need to.
This stuff can be cut with an exacto. I literally just set up my cutting mat that has measurements marked, taped the lucent to it, and used a straight piece of cardboard as my straight edge. A few steady swipes with a sharp exacto and it’s cut down. The 4" piece that’s left can easily fit more ear savers.
It’s definietly not polypropylene, but appears to be a composite of proprietary polymers including poly(ethyl acrylate/methyl methacrylate) and acrylic styrene copolymer. I like the fact that the GHS health rating for the material is 5 (in the GHS rating system, 5 is the most safe rating for health).
I think I’ll give it a try. I sent several different ear saver designs (including the GF design) made with 1/8" acrylic to my son, who is a PA with an urgent care facility. The verdict was that he and his colleagues prefer a 3D-printed ear saver made with a flexible filament. The inflexible acrylic ear savers were too uncomfortable for a 12 hour shift.