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Fabrication and Properties of Self-crimp Side-by-Side Bicomponent Filaments Composed of Polyethylene Terephthalates with Different Intrinsic Viscosity

Guodong Xiang
Guodong Xiang
, 
Hongjing Hua
Hongjing Hua
, 
Qingwen Gao
Qingwen Gao
, 
Jingwen Guo
Jingwen Guo
, 
Xuzhen Zhang
Xuzhen Zhang
 and 
Xiuhua Wang
Xiuhua Wang
   | May 28, 2022
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Article Category: Research Article
Published Online: May 28, 2022
Page range: 68 - 74
DOI: https://doi.org/10.2478/ftee-2022-0009
Keywords
© 2022 Guodong Xiang et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Cross-sections of self-crimp filaments: (a) side-by-side, (b) eccentric sheath-core
Cross-sections of self-crimp filaments: (a) side-by-side, (b) eccentric sheath-core

Fig. 2

Characteristics of H-PET and L-PET. (a) DSC curves (heating process of 1. L-PET and 2. H-PET, cooling process of 3. L-PET and 4. H-PET), (b) viscosity vs. shear rate curves
Characteristics of H-PET and L-PET. (a) DSC curves (heating process of 1. L-PET and 2. H-PET, cooling process of 3. L-PET and 4. H-PET), (b) viscosity vs. shear rate curves

Fig. 3

Cross-section SEM images of bicomponent filaments with various H-PET:L-PET ratios. (a) 70:30, (b) 60:40, (c) 50:50, (d) 40:60, (e) 30:70, (f) H-PET: H-PET 50:50, (g) L-PET: L-PET 50:50).
Cross-section SEM images of bicomponent filaments with various H-PET:L-PET ratios. (a) 70:30, (b) 60:40, (c) 50:50, (d) 40:60, (e) 30:70, (f) H-PET: H-PET 50:50, (g) L-PET: L-PET 50:50).

Fig. 4

OM images of cross-sections (500×) of coloured H-PET/L-PET SBSBFs with various H-PET:L-PET ratios, where the black component is the high-viscosity component. (a) 70:30, (b) 50:50, (c) 30:70)
OM images of cross-sections (500×) of coloured H-PET/L-PET SBSBFs with various H-PET:L-PET ratios, where the black component is the high-viscosity component. (a) 70:30, (b) 50:50, (c) 30:70)

Fig. 5

Characteristics of H-PET/L-PET SBSBFs. (a) sonic orientation factor, (b) wide angle X-ray diffraction patterns, (c) DSC first heating curves, (d) mechanical properties
Characteristics of H-PET/L-PET SBSBFs. (a) sonic orientation factor, (b) wide angle X-ray diffraction patterns, (c) DSC first heating curves, (d) mechanical properties

Fig. 6

Boiling water shrinkage of H- PET/L-PET SBSBFs
Boiling water shrinkage of H- PET/L-PET SBSBFs

Fig. 7

Morphology of crimps of H-PET/L-PET SBSBFs. (a) model image, (b) OM image (500×), (c) physical image (25×)
Morphology of crimps of H-PET/L-PET SBSBFs. (a) model image, (b) OM image (500×), (c) physical image (25×)

Fig. 8

Images of curved H-PET/L-PET SBSBFs after being treated in boiling water with various H-PET:L-PET ratios. (a) 70:30, (b) 60:40, (c) 50:50, (d) 40:60, (e) 30:70)
Images of curved H-PET/L-PET SBSBFs after being treated in boiling water with various H-PET:L-PET ratios. (a) 70:30, (b) 60:40, (c) 50:50, (d) 40:60, (e) 30:70)

Fig. 9

Crimp ratio, crimp moduli and crimp stability of H-PET/L-PET SBSBFs
Crimp ratio, crimp moduli and crimp stability of H-PET/L-PET SBSBFs

Spinning and drawing conditions

Items Parameter
Temperature of extruder(°C) H-PET 292/325/325
L-PET 272/277/276
Spinning manifold Temperature (°C) 305
GR1 (Godet roller 1) Temperature (°C) 85
Speed (m/min) 2310
GR2 (Godet roller 2) Temperature (°C) 125
Speed (m/min) 4310
WR (Winding roller) Speed (m/min) 4200

Specifications of H-PET/L-PET SBSBFs

Component H- PET/L- PET
Specification 110 dtex/34f
Volume Ratio 70:30 60:40 50:50 40:60 30:70

Melt temperatures of H-PET/L-PET SBSBFs

H-PET/L-PET Neck melting peak/°C Main melting peak/°C
70:30 252 259
60:40 253 358
50:50 256 258
40:60 255 258
30:70 257 257
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