Abstract: A method for producing a formed product of deproteinized natural rubber latex capable of reducing a content of an allergen in a natural rubber latex material to a level sufficient to keep the latex from being harmful to the human body without decreasing yields of the product and deteriorating formability of the latex. In the method, cleaning removal of a non-rubber content is carried out after each of protein decomposition, prevulcanization and forming. An aqueous alkali solution, ammonia, water containing free chlorine in an amount of 0.005 to 0.02% by weight or alcohol-water mixed liquid containing alcohol in an amount of 5 to 80% by weight is used as cleaning liquid for the cleaning removal. The method is suitably applied to production of a natural rubber product such as a rubber glove, a condom, a catheter, a foam rubber material and the like.

Abstract: There are provided a deproteinized natural rubber latex which comprises a purified product of proteolytically treated natural rubber latex and contains fine particles of natural rubber latex, a deproteinized natural rubber which comprises a dehydrated product of the deproteinized natural rubber latex, and a process for the production of deproteinized natural rubber latex which comprises subjecting a latex solution prepared by (1) adding water and/or a surfactant to a natural rubber latex and then proteolytically treating the resulting latex solution or (2) proteolytically treating a natural rubber latex and then adding water and/or a surfactant to the treated natural rubber latex, to purification using a rotary plate membrane separation apparatus.