Preparation method of regenerated polyester tops

• Main Authors: PU JINLONG, TAO YE, DENG JINFANG
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2020
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; ORGANIC MACROMOLECULAR COMPOUNDS; SPINNING; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention discloses a preparation method of regenerated polyester tops. The preparation method comprises the steps of: 1, after carrying out washing, sorting and crushing on recovered polyester bottle chips, carrying out alcoholysis on an obtained product, filtering an alcoholysis product to obtain BHET, adding modified monomers into the BHET, and carrying out polymerization to obtain functional regenerated PET; 2, after carrying out sorting, crushing and cleaning on the recovered polyester bottle chips, mixing an obtained product with the functional regenerated PET, drying a mixture and then melting into a melt; and 3, conveying the melt into a spinning box to carry out extrusion spinning so as to prepare the regenerated polyester tops. According to the preparation method, by adoptinga three-monomer modification technology, a easy dyeable gene is grafted to a polyester macromolecular chain, and due to addition of a fatty-acid dibasic-acid flexible gene, dyeability and moisture absorption performance of t