Cyclodextrin
Cyclodextrins form sugar units and biochemicals from natural starch. The cyclodextrin odor adsorption mechanism can be visualized as tiny cells that are externally hydrophobic and internally hydrophilic, which trap odor molecules.
Most odors originate from relatively small molecules. These odor molecules penetrate into the cyclodextrin cell and remain trapped on its inner wall. Being now trapped, they can no longer smell. During the washing process the odor molecules are washed out and replaced by water. On drying, the water is removed from the cyclodextrin and the capsules are emptied, again ready to trap new undesirable odors.
- They are safe to use and their effectiveness is fast to washing.