Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (03): 91-99.doi: 10.13475/j.fzxb.20190501809

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Influence of physical property of reactive ink fluid on jetting behavior

HOU Xueni1, CHEN Guoqiang1,2(), XING Tieling1,2   

  1. 1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215006, China
    2. National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
  • Received:2019-05-09 Revised:2019-11-12 Online:2020-03-15 Published:2020-03-27
  • Contact: CHEN Guoqiang E-mail:chenguojiang@suda.edu.cn

Abstract:

In order to study the effect of reactive ink fluid properties, polymer and surfactant on the ink jet formation process and the ink drops parameters, reactive red inks with different levels of viscosity, different surface tension, different molecular weight polyvinylpyrrolidone (PVP) and different surfactants were prepared. The formation process and flight trajectory of ink jet was observed and the parameters such as the length of ligament, breaking time of ink droplets, oblique angle, ink drop velocity and volume were calculated and analyzed using the drop observation system. The results show that with the increased the ink viscosity, the breaking time of the ink droplet demonstrated an obvious increase, and decreases in the velocity and volume of the ink droplet. The increase of viscosity is beneficial to inhibit the formation of ink droplets, but viscosity greater than 4.56 mPa·s will affect the smoothness of injection. Surface tension greater than 49.1 mN/m is not beneficial to the formation of ink droplets leading to oblique spray. Compared to the use of PVP-K15 and PVP-K30, the addition of PVP-K60 causes the droplet to retract in the jet and fail to form a droplet.

Key words: inject printing, jetting behavior, reactive ink, fluid physical properties, surfactant

CLC Number: 

  • TS194.4

Fig.1

Experimental setup for visualizing droplet formation"

Fig.2

Plots of viscosity variation as a function of shear rate. (a) Ink with different PVP-K30 mass fraction (Group A); (b) Ink with different Surface tension (Group B); (c) Ink with different PVP and surfactant (Group C,D)"

Fig.3

Plots of shear stress variation as a function of shear rate. (a) Ink with different PVP-K30 mass fraction (Group A); (b) Ink with different Surface tension (Group B); (c) Ink with different PVP and surfactant (Group C, D)"

Fig.4

Influence of viscosity on droplet drop formation"

Fig.5

Flight trajectory of drop formation for reactive inks with various values of viscosity"

Tab.1

Effect of viscosity on parameters of droplet"


黏度/
(mPa·s)
表面张力/
(mN·m-1)
t1/
μs
t2/
μs
ν/
(m·s-1)
V/
pL
θ/
(°)
1 1.51 33.6 12.00 30 4.17 6.52 0.871
2 2.59 34.3 12.75 28 3.73 5.93 0.356
3 3.60 34.6 13.75 25 3.32 5.42 0.031
4 4.56 34.5 15.00 23 2.73 5.17 0.410
5 5.61 34.2 16.50 21 2.45 4.93 0.116
6 6.49 33.7 18.00 20 1.52 4.45 0.707

Fig.6

Effect of viscosity on filament length of drop"

Fig.7

Effect of viscosity on droplet injection fluency"

Fig.8

Influence of surface tension as droplet drop formation"

Fig.9

Flight trajectory of drop formation for reactive inks with various values of surface tension"

Tab.2

Effect of surface tension on parameters of droplet"


黏度/
(mPa·s)
表面张力/
(mN·m-1)
t1/
μs
t2/
μs
ν/
(m·s-1)
V/
pL
θ/
(°)
1 3.43 25.8 14.00 25 3.34 5.43 0.467
2 3.36 31.8 13.25 25 3.32 5.47 0.090
3 3.44 37.6 13.50 24 3.37 5.45 0.170
4 3.38 43.1 13.25 24 3.30 5.45 0.297
5 3.47 49.1 13.00 23 2.99 5.42 2.885
6 3.49 56.5 13.00 18 2.85 5.59 4.615

Fig.10

Effect of surface tension on droplet injection fluency"

Tab.3

Effect of PVP and surfactant on parameters of droplet"

种类 黏度/
(mPa·s)
表面张力/
(mN·m-1)
t1/
μs
t2/
μs
ν/
(m·s-1)
V/
pL
θ/
(°)
PVP-K15 3.85 33.3 13.5 25 5.17 3.07 0.122
PVP-K30 3.89 33.9 14.0 24 5.15 2.86 0.041
PVP-K60 3.78 34.4
Surfynol 465 3.31 33.9 13.5 28 5.42 3.30 0.092
Dynol 604 3.14 33.7 12.5 23 5.46 3.29 0.382
Plurafac LF 901 2.99 33.1 13.0 24 5.48 3.38 0.341

Fig.11

Infuence of PVP and surfa ctant on droplet drop formation"

Fig.12

Flight trajectory of drop formation for reactive inks with various PVP and surfactant"

Fig.13

Effect of PVP and surfactant on droplet injection fluency"

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