TECHNOLOGY
Technology
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- Time of issue:2019-02-22 00:00:00
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Tianjin Armorus New-material Technology Co.,LTD (formerly 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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