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InterweaveresistanceofKevlarPolypropylenefabricandbulletproofperformanceofSTF-Kevlarcomposites

CONFERENCEPAPER·NOVEMBER2014

DOI:10.13140/RG.2.1.3939.5044

6AUTHORS,INCLUDING:

HafeezullahMemon

ZhejiangSci-TechUniversity

7PUBLICATIONS0CITATIONS

SEEPROFILE

Availablefrom:HafeezullahMemon

Retrievedon:28August2015

Interweave resistance of Kevlar/ Polypropylene fabric

and bulletproof performance of STF-Kevlar composites ZHU Chengyan, WENG Puying, SUN Xichao, LI Yanqing, KANG Lingfeng, MEMON Hafeezullah

Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China

New bullet-proof vests not only should protect

vital parts of one’s anatomy, but also begin to improve comfort.

Application and development of shear thickening fluid and high-

performance fiber in the field of soft resistant body armor gets

better results. Under high speed impact, the main energy-

absorption way of composites is yarn distortion, breaking and

pulled out. So the fabric structure has a great influence on

performance of composites. While interweave resistance means

the friction between warp/weft yarn on the fabric organization

points. It can evaluate the shear deformation of the fabric and

show the bullet-proof performance of composites. This paper

uses Kevlar fiber as raw materials with different arguments of

polypropylene to make STF-Kevlar composites, discusses how

different fabric specifications would affect the performance of

composites.

1. Wang, B. Light and Textile Industry and Technology. 2010, 39(4): 22-24.

2. Gu, Z W. J. Textile Research. 2006, 27(08): 80-84.

3. Decker M J, et al. Composites Science and Technology. 2007, 67(3-4): 565-578.

4. Xu, S P.; Zheng, W.; Zang, Y F. J. Tianjin Polytechnic University.2012, 31(3): 15-19.

5. Sun, X C.; Li, Y Q.; Zhan, X F.; et al. J. Textile Research. 2014, 35(08): 5-9.

6. Sun, X C.; Li, Y Q.; Wu, Z.; et al. J. ZSTU. 2014, 31(02): 127-131.

7. Chen, H L.; Yao, M. J. Textile Research. 1992, 13(09): 13-14.

8. Kirkwood K M.; Kirkwood J E.; Lee Y S. J. Textile Research. 2003, 14(16): 21-36.

With the linear density of polypropylene increasing and to

strengthen the combination between yarns, interweave

resistance is better and bulletproof properties of composites

become optimal. With the increase in number of polypropylene

and the combination area expanded, interweave resistance

increases linearly, and bulletproof performance is better. As the

fabric of polypropylene spacing decreases, more energy is

absorbed by the composites.

This work was financially supported by the Program for Zhejiang Leading Team of Science and Technology Innovation(No.2011R50003) and Key

Laboratory of Research of Industrial Textile Materials on the Manufacturing Technology of Zhejiang Province.

Zhejiang Sci-Tech University

Asia-Africa Science Platform Program on

Neo-fiber Technology

Seminar Series 9

INTRODUCTION RESULTS AND DISCUSSION

EXPERIMENTAL SECTION

CONCLUSION REFERENCES

ACKNOWLEDGMENTS

Firstly, the paper bases on the parame-

ters to make 14 kinds of plain weave fabrics,

the parameters as shows in figure 1.

Then, do hot-press by flat vulcanizing

machine to melt the polypropylene.

The third step, prepare STF which so-

lid content is 30% by PEG-200 as dispers-

ing media and SiO2-20nm as nanoparticles.

And then make STF-Kevlar fabric compo-

sites. It has five layers of fabric connected

by TPU.

Fig.1 Adding polypropylene fiber

parameters

单根纱线

开剪标记线

拔脱运动方向

丙纶和芳纶混合

测 时 仪 2发 射 装 置

子 弹 枪 管

测 时 仪 1

试 样 缓 冲 设 备

Specimen preparation

The study tests the interweave resistance by using the

universal material experiment machine.

The study tests the bulletproof performance of STF-Kevlar

composites with the help of the pneumatic high-speed

launcher.

Test

Fig.2 The schematic

diagram of interweave

resistance Fig.3 The pneumatic high-speed launcher

0 20 40 60 80 100 120 140

0

5

10

15

20

25

交织

阻力

/MP

a

丙 纶 线 密 度 /tex

0 1 2 3 4 5 6

0

5

10

15

20

25

30

35

交织

阻力

/M

Pa

丙 纶 根 数 / 根

Fig.4 shows that polypropylene line density increases, the

interweave resistance of the fabric will increase. When the linear

density reaching to a certain value, interweave resistance increases

slowly. Interweave resistance of the Kevlar fabric is 1.19MPa. Once

adding the polypropylene to the fabric, its interweave resistance

increase to 7.69 MPa. Because polypropylene melt at high

temperature, it can work as adhesive in the fabric, strengthen the

combination between the yarn, effectively prevent movement

between the yarn and make the fabric weaving resistance improved

significantly.

Fig.4 The relationship between

interweave resistance and the

linear density of polypropylene

When the number of

Polypropylene increases,

the area of yarn bonding

widens within a certain

distance. Adding polyp-

ropylene to fabrics has a

significant effect to

strengthen the interweave

resistance.

Fig.5 The relationship between

interweave resistance and the

number of polypropylene

20 40 60 80 100 120 14083

84

85

86

87

88

I m/(

J·m

2·

kg

-1)

丙 纶 线 密 度 /tex

2 3 4 5 6

80

82

84

86

88

90

92

94

I m/(

J·m

2·

Kg

-1)

丙 纶 根 数 / 根

4 6 8 10 12 14 1678

80

82

84

86

88

90

92

94

96

I m/(

J·m

2·

Kg

-1)

丙 纶 间 距 / cm

Fig.6 The relationship between

energy absorption capability of

composites and the linear density

of polypropylene

Fig.7 The relationship between

energy absorption capability of

composites and the number of

polypropylene

Fig.8 The relationship between

energy absorption capability of

composites and the spacing of

polypropylene

Based on the fitted curve in Figure 6, the greater is the

polypropylene line density, the more is the energy absorption

capability of composites in per unit area. It means that the bullet-

proof performance of composites is stronger.

Ramping up the number of polypropylene, interweave resistance

increase, and the bullet-proof performance of composites is better.

But when the number reaches to a value, performance improvement

effect of composites is weaker.

As shown, the spacing of polypropylene closes up, the energy

absorption capability of composites is strengthened. This is due to

the melting polypropylene, it effectively prevent fiber distortion and

be pulled out, and to strengthen the bullet-proof performance of

composites.