The tannin extract, the tannin powder, the comminution process comminution the complex of those heavy metal, and

摘要

PPROBLEM TO BE SOLVED: To provide tannin extract solution and tannin powder that has high anti-microbial and deodorizing effects with long duration and high safety to human body. PSOLUTION: In the crushing step 1, the bark including tannin is crushed, and in the mixing step 2, the crushed bark is mixed with sodium bicarbonate aqueous solution. In the heating step 4, the mixture is heated for a predetermined time, as air is blown into the mixture 5. After the heating, in the separation step 6, the mixture is separated into the solid component and the liquid component, thereby the liquid component is obtained as the tannin extract solution 8. In the drying step 7, the solid component is dried to obtain the tannin powder 9. PCOPYRIGHT: (C)2008,JPO&INPIT