A METHOD TO INCREASE INTRINSIC VISCOSITY OF RECYCLING POLYESTER WASTE

摘要

The present invention relates to a method to increase intrinsic viscosity of recycling polyester waste, first, shredding the recycled polyester waste, pouring the shredded polyester waste into a melting unit (20) for smelting for achieving melting status, after filtration, pouring the semi-finished pellet into a reactor tank (40), the molecular chain of the melting polyester will depolymerize to a shorter molecular chain and further repolymerize to a molecular chain fitting the requirement, and using a vacuum unit (50) to remove the organic impurity, moisture and dirt for increasing the intrinsic viscosity of the semi-finished pellet to make intrinsic viscosity be higher than 0.65dl/g; the present invention increases intrinsic viscosity of recycling polyester waste by changing the I.V. of the RPET and the structure of the molecular chain, enhancing the quality of the RPET for increasing applicability and economic benefits of RPET.