The only things which seem to grab my negative attention regarding perforated plastic vs. rayon linings:
1. Flow rate: if one was to remove the linings from the competitive diapers and make equal-sized air filters to check flow rate, I'm sure the perforated plastic would show greater airflow restriction. This would likely be very similar with 98.6-degree urine, as well, being that aerodynamics and hydrodynamics are remarkably similar to each other;
2. Capillary action: water loves to cling to things, especially small holes, such as exhibited in medical pipettes. Any water of virtually any composition or temperature, provided the viscosity was about the same, would not want to permeate perforated plastic as easily as rayon...and would probably require some degree of force through said plastic to keep up with rayon's wick-and-flow attributes to get into the diaper's padding where it belongs. Which explains why I'd often leak more when wetting in plastic-lined Attends because their flow-through rate just wasn't as good as the rayon-lined ones. And no wonder those diapers felt uncomfortably sticky, even a tad slimy. Ew!
That's why I hated plastic-lined. A diaper should feel reasonably comfortable, even when wet, and those didn't do it. Perhaps if more nurses and nursing staffers were compelled to wear and wet diapers here and there, they'd understand, empathize and advocate more. After all, most people in medical school get to experience what they will eventually give to their patients: blood draws, injections, IVs, various exams...even pelvic (and males have to experience that, too)! So my opinion: make them wear and wet a few diapers! A little compelled empathy goes a loooong way in both comfort and R&D.
