Page 53 - 《橡塑技术与装备》英文版2026年1月

SPECIAL AND COMPREHENSIVE REVIEW

harm the health of construction workers. no longer meet the important requirements of
Polyurea elastomers are recognized as key corrosion prevention and protection in the military
materials for protecting the strength and safety of field. Polyurea materials combine strength with
projects such as highways, rail transit, and cross-sea ductility, and possess strong energy absorption
bridges due to their excellent waterproofing, rust- capability while also exhibiting ultra-high adhesion
proofing, and corrosion resistance. Their superior performance. This has made research on their
resistance to salt spray and oxidation also makes composite with other materials a hot topic, opening
them ideal anti-corrosion materials in the field of up a new horizon for China's military field.
marine and offshore engineering. Currently, existing protective equipment is
The high-speed railway adopts the CRTS II primarily designed to withstand ballistic penetration
type ballastless track slab bridge deck design, injuries caused by explosions, lacking targeted
which requires the waterproof layer to not only design and multi-functional coupling research on
be impermeable and crack-resistant, but also to other injury factors such as blast-induced injuries
withstand the high-speed and heavy loads, alternating and thermal radiation injuries. Xue Shengpeng
impacts, etc. brought by high-speed trains. Sprayed des igned a new type of micro-nano inclus ion
polyurea coating is an amorphous liquid waterproof composite polyurea material, PU-SiO2 and PU-HP
material at room temperature, with no joints and modified helmets, to resist blast-induced injuries.
strong bonding strength, which can achieve "skin- The research results show that the protective effect
type" waterproofing. At the same time, it also of the two modified polyurea materials on blast
possesses excellent performance, fully meeting the waves increases with the increase of particle content.
special requirements of high-speed railways. Compared to PU material, at the highest inclusion
The 2006 Beijing-Tianjin high-speed railway ratio and a thickness of 12 mm, the peak pressure
marked the first large-scale successful application of PU-SiO2 and PU-HP decreases by 8.71% and
of spray polyurea elastomer (SPUA) technology on a 16.77%, respectively. The results of cranial brain
high-speed railway. In this project, over 2,000 tons protection experiments indicate that, compared to
of SPUA materials were used, covering a protective the unprotected state of a bare head, both helmets
area of 950,000 square meters. Subsequently, high- provide good protection at frontal and parietal
speed railways such as the Beijing-Shanghai, measurement points, but the protective effect at
Beijing-Shijiazhuang, Shijiazhuang-Wuhan, and the occiput is not significant. The attenuation of
Shanghai-Hangzhou railways also adopted SPUA frontal pressure is reduced by 44.51% and 51.74%,
waterproof layers. Notably, the Beijing-Shanghai respectively, and the peak acceleration attenuation
high-speed railway, constructed in 2009, spans 1,318 is 55.80% and 57.80%, respectively. At the parietal
kilometers and utilizes a total of 20,284 tons of pressure measurement point, after helmet protection,
SPUA, making it the world's largest infrastructure the peak pressure is significantly reduced overall,
SPUA protection project since the technology was and the peak acceleration is reduced to within 40.0 g.
introduced in the United States in 1986. Qin Yinxing utilized the high elasticity and
2.2 Application of polyurea in the military strong adhesion of polyurea materials, combining
field them with lightweight and high-strength glass fiber
Conventional materials such as epoxy resin reinforced composites that are relatively weak in
and polyurethane, due to their general performance impact resistance. He then conducted an analysis on
in impact resistance and wear resistance, as well the impact resistance performance of the resulting
as their lack of environmental friendliness, can polyurea-coated glass fiber composite panels. The

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