Method for preparing recycled polyester high-purity synthetic particle

• Main Authors: ZHU DAQING, ZHOU GUOXIANG
• Format: Patent
• Language: Chinese; English
• Published: 26.03.2014
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The invention relates to a method for preparing recycled polyester high-purity synthetic particle. The method comprises the following steps: firstly, selecting recycled polyester raw materials, drying the materials, melting and extruding the recycled polyester raw materials through a double-screw extruder, putting in a viscosity increasing reaction kettle to carry out viscosity increasing reaction, filtering out small-particle impurities in the high viscosity melt after the reaction through a melt filter and carrying out underwater cooling and pelletizing to obtain the recycled polyester high-purity synthetic particle. The method disclosed by the invention has the advantages that the phenomena such as filament break and filament ossification in fore-spinning process of fiber can be reduced and the fiber finished product quality is increased, so that the production cost is saved and the purposes of low carbon and environmental protection are realized; when being used for spinning recycled multifunctional polye