Using brighten white and modified PET chips, fine denier hollow fibres (dpf=0.5～1.5) were prepared on a Fuji Filter MSTC-400 and VC-443A drawn machine, whose structure and properties were tested by X-ray diffraction ...Using brighten white and modified PET chips, fine denier hollow fibres (dpf=0.5～1.5) were prepared on a Fuji Filter MSTC-400 and VC-443A drawn machine, whose structure and properties were tested by X-ray diffraction mater, SOM-II sonic velocity meter and Instron-1122 Tensile tester, electron and light microscopy etc,. The results show: fine denier hollow taken-up yarns prepared at low spinning velocity have radial orientation, higher strength and elongation at rupture because radial stress is higher than normal stress. Fine denier hollow drawn yarns with hollow degree up to 18～35％ and high tenacity, together with high crystalline degree and small crystal and amorphous domains, can be empolyed as products.展开更多
This paper is a part of studies on the silk-like polyester filaments.This paper studiesthe structural characteristics of fine denier PET undrawn filaments and mechanical proper-ties on the spinning line by mcans of in...This paper is a part of studies on the silk-like polyester filaments.This paper studiesthe structural characteristics of fine denier PET undrawn filaments and mechanical proper-ties on the spinning line by mcans of infra-red spectra,X-ray diffraction,birefringence,density gradient colum,tension testing and calculating.The results show that the solidificat-ing stress is larger than 10 dyn/cm,orientation and crystallinity incrcase,thestress-crystallization is larger than the effects of cooling velocity,and the boiling watershringkage behaves limited value.It is confirmed that the forming conditions of undrawnfilaments is mainly kinetic control by the methods of X-ray analysis as well as other testingand calculating.展开更多
The primariy application of rare - earth spin finishes on PET/PA composite super - fine denier fiber has been studied in this paper. It results in the improvement of fi-ber’s properties, such as increased whiteness, ...The primariy application of rare - earth spin finishes on PET/PA composite super - fine denier fiber has been studied in this paper. It results in the improvement of fi-ber’s properties, such as increased whiteness, brightness and brilliance, effective and uniform spliting of compos-ite fiber into super - fine denier fiber and enhanced dye-ing effect.展开更多
A series of phenylazo-β-naphthol-containing sulfonamide disperse dyes were prepared from C.I.Acid Orange 7 by successive reactions of chlorination and amination,and their chemical structures were characterized by FTI...A series of phenylazo-β-naphthol-containing sulfonamide disperse dyes were prepared from C.I.Acid Orange 7 by successive reactions of chlorination and amination,and their chemical structures were characterized by FTIR,1H NMR,and mass spectrometry.The dyes were applied to coloring of knitted fabrics from fine denier polypropylene fibers by exhaust dyeing and their optimal dyeing conditions,such as dyebath pH,dyeing temperature,dyeing time,and dye concentration were investigated in detail.Then,dye exhaustion,color strength,and color fastnesses of the dyes on the fibers were assessed and summarized.In view of dye exhaustion and color strength of the sulfonamide dyes on fine denier PP fabrics,90℃ was selected as the best dyeing temperature at dye concentration below or equal to 3.0%owf.For achieving higher color strength,130℃ was the better choice when the dye concentration was above 3.0%owf.The sulfonamide dyes,especially secondary sulfonamide dyes,exhibited superior dye exhaustion and color fastnesses to washing,sublimation,and rubbing on fine denier PP fabrics in comparison to C.I.Solvent Yellow 14 bearing the same chromophore but without sulfonamide group.展开更多
文摘Using brighten white and modified PET chips, fine denier hollow fibres (dpf=0.5～1.5) were prepared on a Fuji Filter MSTC-400 and VC-443A drawn machine, whose structure and properties were tested by X-ray diffraction mater, SOM-II sonic velocity meter and Instron-1122 Tensile tester, electron and light microscopy etc,. The results show: fine denier hollow taken-up yarns prepared at low spinning velocity have radial orientation, higher strength and elongation at rupture because radial stress is higher than normal stress. Fine denier hollow drawn yarns with hollow degree up to 18～35％ and high tenacity, together with high crystalline degree and small crystal and amorphous domains, can be empolyed as products.
文摘This paper is a part of studies on the silk-like polyester filaments.This paper studiesthe structural characteristics of fine denier PET undrawn filaments and mechanical proper-ties on the spinning line by mcans of infra-red spectra,X-ray diffraction,birefringence,density gradient colum,tension testing and calculating.The results show that the solidificat-ing stress is larger than 10 dyn/cm,orientation and crystallinity incrcase,thestress-crystallization is larger than the effects of cooling velocity,and the boiling watershringkage behaves limited value.It is confirmed that the forming conditions of undrawnfilaments is mainly kinetic control by the methods of X-ray analysis as well as other testingand calculating.
文摘The primariy application of rare - earth spin finishes on PET/PA composite super - fine denier fiber has been studied in this paper. It results in the improvement of fi-ber’s properties, such as increased whiteness, brightness and brilliance, effective and uniform spliting of compos-ite fiber into super - fine denier fiber and enhanced dye-ing effect.
基金the National Outstanding Youth Foundation of China(No.20525620)Program for Changjiang Scholars and Innovative Research Team in the University(IRT0711)Science Foundation of Zhejiang Sci-tech University(ZSTU)for financial support.
文摘A series of phenylazo-β-naphthol-containing sulfonamide disperse dyes were prepared from C.I.Acid Orange 7 by successive reactions of chlorination and amination,and their chemical structures were characterized by FTIR,1H NMR,and mass spectrometry.The dyes were applied to coloring of knitted fabrics from fine denier polypropylene fibers by exhaust dyeing and their optimal dyeing conditions,such as dyebath pH,dyeing temperature,dyeing time,and dye concentration were investigated in detail.Then,dye exhaustion,color strength,and color fastnesses of the dyes on the fibers were assessed and summarized.In view of dye exhaustion and color strength of the sulfonamide dyes on fine denier PP fabrics,90℃ was selected as the best dyeing temperature at dye concentration below or equal to 3.0%owf.For achieving higher color strength,130℃ was the better choice when the dye concentration was above 3.0%owf.The sulfonamide dyes,especially secondary sulfonamide dyes,exhibited superior dye exhaustion and color fastnesses to washing,sublimation,and rubbing on fine denier PP fabrics in comparison to C.I.Solvent Yellow 14 bearing the same chromophore but without sulfonamide group.
