Deproteinized natural rubber latex and preparation method

A method for preparing a deproteinized natural rubber latex, comprising:

• compounding mesh gauze with an adsorption medium solution, and conducting adsorption to obtain enzyme carrier gauze;
• immersing the enzyme carrier gauze in four solutions, each containing one of four different enzymes, respectively, to conduct enzyme adsorption;
• conducting cross-linking immobilization on each treated gauze in a cross-linking agent solution to obtain mono-layer immobilized enzyme filter sheets corresponding to each of the four different enzymes;
• and
• laminating the mono-layer immobilized enzyme filter sheets corresponding to each of the four different enzymes to obtain an immobilized enzyme filter screen;
• wherein the four different enzymes are selected from the group consisting of protease, peptidase, phospholipase, and lipase;
• mixing natural rubber latex, water, and nonionic surfactant, adding a gluconolactone solution to a resulting mixture, and conducting recirculating filtration on a resulting mixed solution by lifting and dropping the immobilized enzyme filter screen until a pH value is 3 to 6 to obtain a post-enzymolysis latex;
• and
• mixing the post-enzymolysis latex, a water-soluble polymer, and an anionic surfactant, adjusting a resulting mixture to a pH value of 9 to 11, conducting solubilization, and conducting centrifugal separation to obtain the deproteinized natural rubber latex.