US Patent 11180300 Degradable article

Degradable water- and oil-resistant article is made of chitin and contains water-activated chitin-degrading enzyme or enzymes. Initially supplied in an inactive lyophilized (dry) form, the enzyme or enzymes upon exposure to water present in ambient environment degrade chitin-based article to chitosan, a benign compound. Several article embodiments presented, some with water ingress retardant features.