Effect of preparation process on properties of deproteinized natural rrubber

Latex proteins are divided into binding proteins and water-soluble proteins，while the water-soluble proteins are recognized allergen of natural rubber. The adsorption precipitation method and enzyme hydrolysis method are used to handle the latex and act on different types of proteins. The deproteinized natural rubbers by different preparation had been studied，on and investigated the effect on appearance of natural rubber，Mooney viscosity， curing characteristics，mechanical properties and so on. The results showed that the properties including mooney viscosity，mechanical properties and heat aging properties could be reduced by the degree of protein removal increases. Enzymatic hydrolysis of protein removal process could effectively reduce the total protein content，while the adsorption precipitation process could effectively remove water-soluble proteins and other non-rubber substances and achieve the double purpose of reducing allergy and purifying rubber. Adsorption precipitation method for protein removal is superior to enzyme hydrolysis method .