MANUFACTURING METHOD OF NATURAL RUBBER

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of natural rubber excellent in productivity and capable of easily controlling a quality as compared with conventional rubbers of RSS and TSR. SOLUTION: In the manufacturing method of natural rubber, a drying step is included and dries it at a temperature of 80 deg.C-160 deg.C using a conveyor type drying machine. It is desirable that a step for adding a constant viscosity agent is included until the drying step is complete. The employable constant viscosity agent can include a hydrazide compound represented by the following general formula (I): R-CONHNH2 (R in the formula (I) represents an alkyl group having the carbon number of 3-30; a cycloalkyl group having the carbon number of 3-30 or an aryl group).