Method of controlling crimp shrinkage of fine-denier polyester by adjusting content of pentaerythritol

The invention relates to a method of controlling the crimp shrinkage of a fine-denier polyester by adjusting the content of pentaerythritol. The method is characterized by comprising the following steps: adjusting the irregularity of molecular chains of polyester fibers by means of a branching effec...

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Bibliographische Detailangaben
Hauptverfasser:	DING HAITAO, TONG YONG, LI GANG, LING BINGWEN, HU BIN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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 CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, ORYARNS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MECHANICAL FINISHING OF YARNS OR ROPES 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 WARPING OR BEAMING YARNS YARNS OR THREADS
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Beschreibung
Zusammenfassung:	The invention relates to a method of controlling the crimp shrinkage of a fine-denier polyester by adjusting the content of pentaerythritol. The method is characterized by comprising the following steps: adjusting the irregularity of molecular chains of polyester fibers by means of a branching effect of the pentaerythritol to a molecular chain of PET (Polyethylene Terephthalate) so as to change the flexibility of the molecular chains of the fibers; and finally, controlling the crimp shrinkage of the fine-denier polyester. On one hand, the method provided by the invention can greatly increase the crimp shrinkage of polyester filament yarns (from 25-38% to 40-46.7%), and on the other hand, the method can adjusts the crimp shrinkage of the fibers according to the filament number of the fibers by means of adjusting the content of the pentaerythritol, so that the fibers with different filament numbers are close in crimp shrinkage under a same draw texturing process condition, and thus, technical changes caused by