Armorus

TECHNOLOGY

Technology

  • Categories:Technology
  • Time of issue:2019-02-22 00:00:00
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Tianjin Armorus Textiles Co., LTD develop and supply body armors mostly produced from two types of industrial fiber: Aramid fiber and Polyethylene fiber. Since the imported Aramid fiber is not sufficiently competitively availed of now from oversea manufacturers, we are mainly adopting the domestic advanced fiber - High Tenacity High Modulus Polyethylene fiber for our body armoring products. High Tenacity High Modulus Polyethylene fiber, also called the Ultra High Molecular Weight Polyethylene (UHMWPE) fiber, is a kind of high-tech high performance fiber developed in last decades. Compared with the other two high technology fibers in current world (carbon fiber and Armaid fiber), UHMWPE fiber has the highest tenacity because of its high molecular weight, high interlinking, high degree of orientation and high Crystallionity. Its tenacity is more than 10 times higher than good quality steel and normal chemical fiber; this fiber also characterizes as low density, high modulus, UV resistance, corrosion resistance, anti-impact and anti-incision, etc. It is now widely used in national defense weaponry, such as bulletproof vest, bulletproof helmet, armor plate, stab-proof vest, etc. Other applications are composite material for aviation and ocean shipping, rope for navy vessel, tow net for ocean halieutics, sports equipment and construction reinforcement material, etc. Below are the properties contrasts of the polyethylene fiber with other industrial fibers.
The contrast of specific properties of main industrial fibers

Mechanical performance Types of fibers Density G/cm3 Tenacity Modulus Elongation at break
N/dtex G/d Gpa N/dtex G/d Gpa %
UHMWPE
Aramid fiber
Carbon-fiber(high tenacity)
Carbon-fiber(high modulus)
E-glass fiber
S-glass fiber
PA fiber
PET fiber
PP fiber
Steel fiber
0.97
1.44
1.78
1.85
2.60
2.50
1.14
1.38
0.90
786
3.1
2.05
1.9
1.2
1.35
1.85
0.8
0.8
0.6
0.2
35
23
22
14
15
21
9
9
7
2
3.0
2.9
3.4
2.3
3.5
4.6
0.9
1.1
0.6
1.77
97
41
134
210
28
34
5
10
6
25
1100
470
1500
2400
315
385
56
110
70
225
95
60
240
390
72
86
6
14
6
200
3-4.5
3.6
1.4
0.5
4.8
5.2
20
13
20
1.8

The fibers' maintaining rate after 6 months' soak in following solvents

Solvent UHMWPE fiber(%) Aramid fiber (%)
Seawater 10% Detergent Kerosene Gasoline Methylbenzene Glacial acetic acid 1M Hydrochloric acid 5M Causticalkali 29% Ammonium hydroxide Clorox solution 100 100 100 100 100 100 100 100 100 91 100 100 100 93 72 82 40 42 70 0

The contrast of light resistance

Types of fibers Testing method of light resistance The maintaining rate of strength
Aramid fiber exposed under the ray for1500 hours 30%
UHMWPE exposed under the ray for1500 hours 90%

The contrast of processing performance among three high performance fibers

Types of fibers
Processing
performance
PE fiber Aramid fiber 29 Aramid fiber 49 Carbon fiber
(high tenacity)
Carbon fiber
(high modulus)
Abrasion proof
Resistance to bending
Joint tenacity
Cyclization tenacity
>110x103
>240x103 10-15
12-18
9.5x103
3.7x103
6-7
10-12
5.7x103
3.7x103
6-7
10-12
20
5
0
0.7
120
2
0
0.1

 

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