Buzz
Disposable diapers may contain absorbent chemicals.Key Insights
- The crystalline material found in most disposable diapers is sodium polyacrylate, an absorbent chemical used in the highly absorbent layer.
- Sodium polyacrylate can absorb 200 to 300 times its weight in water, turning it into a gel-like substance that keeps the diaper surface dry.
- Despite its effectiveness in moisture absorption, there are concerns about its safety and the potential risks of direct skin contact with it, fueling discussions over the use of disposable diapers.
The crystals likely originate from the 'super absorbent layer' in most disposable diapers. This layer consists of paper fluff and a chemical absorbent called sodium polyacrylate. Sodium polyacrylate is a remarkable water absorber, capable of absorbing 200 to 300 times its weight in tap water (even more with distilled water), and holding it as a gel.
Sodium polyacrylate is a polymer, which means it is made up of repeating units (monomers) linked together. The monomer for sodium polyacrylate is:
It's quite an interesting polymer — shake the crystals out of a fresh diaper (or purchase the crystals from a garden center) and add water to them. It's really impressive!
There are concerns in some circles about using sodium polyacrylate next to a child's skin. This concern is often cited as a reason against the use of disposable diapers. This diaper page briefly touches on this issue and provides insight into the concerns people have.
