Patent ID: 6693180
Filing Date: 2004-02-17
Classification: A61L,C08J,C08L

Abstract:
A method for producing composite sponge wound dressing made of &bgr;-Chitin and Chitosan, which comprises the steps of:a.) providing a &bgr;-Chitin and a Chitosan; b.) putting said &bgr;-Chitin in deionized water (D.I. Water); c.) blending said &bgr;-Chitin in high speed for forming a hydrogel &bgr;-Chitin; d.) solving said Chitosan by an acid liquid; e.) filtering said Chitosan; f.) mixing said hydrogel &bgr;-Chitin from step c and said Chitosan from step e; g.) forming a sponge by freeze-drying; h.) immersing said sponge in an alkaline liquid for forming salt by neutralization; i.) cleaning and removing said salt with water until said sponge becoming neutral; j.) cleaning said sponge with D.I. Water repeatedly; and k.) producing a composite sponge wound dressing made of &bgr;-Chitin and Chitosan by vacuum drying.