Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (11): 13-19.doi: 10.13475/j.fzxb.20180805107

• Fiber Materials • Previous Articles     Next Articles

Structure and properties of several differentiated polyester fibers

WEI Yanhong1, LIU Xinjin1(), XIE Chunping1, SU Xuzhong1, JI Yijun2   

  1. 1. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
    2. Nantong Double Great Textile Co., Ltd., Nantong, Jiangsu 226600, China
  • Received:2018-08-23 Revised:2019-07-02 Online:2019-11-15 Published:2019-11-26
  • Contact: LIU Xinjin E-mail:liuxinjin2006@163.com

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Abstract:

In order to better understand the structure and properties of novel differentiated polyester fiber and provide a reference for subsequent product development. The structures and performances of polyester(PET), polytrimethylene terephthalate(PTT), low viscosity PET and high shrinkage PET cornposite filament(SPH) and PET/PTT composite elastic fiber(T400) were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffractometer, three-dimensional digital microscope, thermogravimetry, etc. The results show that the surface of SPH and T400 fiber have grooves, which can produce capillary effect. After stretching or heat treatment, the SPH fiber can be self-crimped. T400 fiber has large crimp shrinkage, high breaking strength and good elastic recovery. PET has high breaking strength, and can be used as a silk product. The molecular structure of PTT has a unique odd carbon effect, which enables the fiber to have higher resilience and elastic recovery.

Key words: differentiated fiber, polyester fiber, elastic recovery, breaking strength, structure

CLC Number: 

  • TS102

Fig.1

Infrared spectroscopy of fiber"

Fig.2

XRD pattern of fiber"

Fig.3

SEM images of fibers. (a) SPH cross section; (b) SPH surface; (c) T400 cross section; (d) T400 surface;(e) PTT cross section; (f) PTT surface; (g) PET cross section; (h) PET surface"

Tab.1

Strength and elongation of fibers"

纤维名称 断裂
伸长率/%		 断裂强度/
(cN·tex-1)		 断裂功/
(cN·cm)
SPH 14.40 26.96 486.06
T400 23.78 30.51 811.49
PET 28.37 37.86 —
PTT 39.91 25.80 1 065.07

Tab.2

Elastic recovery of fibers"

定伸
长率/%		 循环
次数		 弹性回复率/%
SPH T400 PET PTT
5 1 94.4 98.4 87.8 93.3
5 5 90.4 92.4 — 87.2
10 1 74.0 96.4 62.6 94.0
10 5 67.2 87.6 — 90.0
15 1 — 91.2 46.3 91.2
15 5 — 80.5 87.7
20 1 — — 38.7 89.4
20 5 — — — 84.2

Tab.3

Plastic deformation of fibers"

定伸
长率/%		 循环
次数		 塑性变形率/%
SPH T400 PET PTT
5 1 0.28 0.08 10.20 0.33
5 5 0.48 0.38 — 0.64
10 1 2.60 0.36 37.37 0.60
10 5 3.28 1.24 — 1.00
15 1 — 1.32 53.69 1.32
15 5 — 2.92 — 1.84
20 1 — — 61.31 2.12
20 5 — — — 3.16

Tab.4

Boiling water shrinkage of fibers"

纤维
名称		 长度/cm 沸水
收缩率/%
煮沸前 煮沸后
SPH 49.8 40.0 19.6
T400 49.5 37.5 24.2
PET 50.0 45.5 8.4
PTT 49.8 45.6 9.0

Fig.4

DSC curve (a) and TG curves (b) of fibers"

Fig.5

Curl morphology of fibers before and after repeated stretching and boiling water treatment(×100). (a) SPH unprocessed; (b) SPH after repeated stretching; (c) SPH after boiling; (d) T400 unprocessed; (e) T400 after repeated stretching; (f) T400 after boiling; (g) PTT unprocessed; (h) PTT after repeated stretching; (i) PTT after boiling; (j) PET unprocessed; (k) PET after repeated stretching; (l) PET after boiling"

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