Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (09): 70-75.doi: 10.13475/j.fzxb.20210706806

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of tetrahydrofuran homopolyether-polybutyleneterephthalate/polyethylene terephthalate parallel composite fiber

HE Qi1,2, LI Junling1,2, JIN Gaoling3, LIU Jin1,2, KE Fuyou1,2, CHEN Ye1,2(), WANG Huaping1,2   

  1. 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
    2. College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
    3. China Chemical Fibers Association, Beijing 100020, China
  • Received:2021-07-23 Revised:2022-03-08 Online:2022-09-15 Published:2022-09-26
  • Contact: CHEN Ye E-mail:chenye@dhu.edu.cn

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Abstract:

In view of insufficient crimp elasticity and poor wearing comfort of polybutylene terephthalate/polyethylene terephthalate (PBT/PET) parallel composite fibers, tetrahydrofuran homopolyether (PTMG) was selected to modify PBT and conventional PET were used as raw materials to prepare PTMG-PBT/PET parallel composite fibers by composite spinning. The effect of PTMG mass fraction on the properties of polyether ester and composite fibers, and the crimp properties of composite fibers by heat treatment process were studied. The results show that with the increase of the mass fraction of PTMG, the water absorption and moisture absorption rate of polyether ester can reach 4.10% and 1.62% respectively, the contact angle can reach 63.81°, and the crimping performance of the composite fiber is also significantly improved, reaching a crimp ratio of 48%. Heat treatment can further improve the crimp properties of composite fibers and the effect of wet heat treatment is shown to be better than that of dry heat treatment. After wet heat treatment, the crimp ratio and crimp recovery of the composite fibers reach 70% and 55%, respectively. PTMG can also improve the normal pressure dye uptake rate of composite fibers, which reaches as high as 93.25%, and is 12% higher than that of PBT/PET parallel composite fibers.

Key words: tetrahydrofuran homopolyether, parallel composite fiber, moisture absorption property, heat treatment, crimp property, dye uptake rate

CLC Number: 

  • TQ342.22

Tab.1

Basic performance parameters of raw material slicing"

样品名称 PBT质量
分数/%		 PTMG质
量分数/%		 特性黏度/
(dL·g-1)		 结晶
温度/℃		 熔点/
℃
PET — — 0.68 127 258
PBT — — 1.10 148 230
PTMG-PBT90 90 10 1.22 129 210
PTMG-PBT80 80 20 1.34 125 203
PTMG-PBT65 65 35 1.45 122 197
PTMG-PBT45 45 55 1.57 120 193

Fig.1

Preparation process of parallel composite fiber"

Tab.2

Parallel composite fiber spinning parameters"

原料名称 纺丝温度/℃ 喷丝板
温度/℃		 环吹风
温度/℃		 纺丝速度/
(m·min-1)
一区 二区 三区 四区
PET 295 300 300 295 290 30 600
PTMG-PBT 270 275 275 270

Tab.3

Parallel composite fiber specifications"

纤维名称 线密度/dtex
PBT/PET 255
PTMG-PBT90/PET 232
PTMG-PBT80/PET 219
PTMG-PBT65/PET 189
PTMG-PBT45/PET 144

Fig.2

Water contact angles of PTMG-PBT with different mass fractions of PTMG"

Tab.4

Water absorption and moisture absorption properties and volume specific resistance of PBT and PTMG-PBT"

试样名称 吸水率/% 吸湿率/% 体积比电阻/(Ω·cm)
PBT 1.22 0.61 5.82×1012
PTMG-PBT90 1.44 0.67 1.25×1012
PTMG-PBT80 1.96 1.17 6.34×1011
PTMG-PBT65 2.47 1.32 2.45×1011
PTMG-PBT45 4.10 1.62 1.25×1010

Fig.3

Orientation properties of parallel composite fibers with different mass fractions of PTMG"

Tab.5

Mechanical properties of parallel composite elastic fibers"

纤维名称 断裂强度/(cN·dtex-1) 断裂伸长率%
PBT/PET 2.93 17.4
PTMG-PBT90/PET 2.68 51.8
PTMG-PBT80/PET 2.54 70.2
PTMG-PBT65/PET 2.19 80.7
PTMG-PBT45/PET 1.97 90.1

Fig.4

Boiling water shrinkage of parallel composite fibers with different mass fractions of PTMG"

Fig.5

Crimp ratio of parallel composite fiber with different mass fractions of PTMG"

Fig.6

Effect of dry heat treatment on crimp properties of parallel composite fiber. (a) Different dry heat treatment temperatures;(b) Different dry heat treatment time"

Fig.7

Crimp properties of parallel composite fibers under different heat treatments.(a)Crimp ratio; (b)Crimp recovery"

Fig.8

Dye uptake rate of parallel composite fibers with different mass fractions of PTMG"

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