(I) Military Requirements and Application Direction of Multi-band Camouflage Stealth tarpaulin In the war under high-tech conditions, the battlefield viability of various ground military targets such as tanks, vehicles, airplanes and missiles and important command projects, launching positions, rear warehouses and other military projects is seriously threatened. The application of stealth materials can reduce the acoustic, optical, electrical, magnetic and other characteristic signals of military targets, reduce their observability and the probability of being hit by guided weapons, thus improving the battlefield survivability and penetration ability of military targets and enhancing their operational effectiveness. (II) Technical Principle Multi-band camouflage stealth materials cover many stages such as visible light, middle and far infrared, millimeter wave and centimeter wave. 1. In radar absorbing materials, low interface reflection and high loss angle are two basic prerequisites for obtaining broadband and high attenuation performance. Multi-layer tarpaulin made of absorbing short fiber material can achieve reflection attenuation of 10db or more in a very wide frequency band of millimeter wave and centimeter wave through optimization design. 2. The coating structure with high transmittance and different emissivity for radar wave energy is adopted to solve the compatible stealth technology of visible light, infrared and radar wave. At the same time, a high reflection layer of thermal infrared radiation is compounded on the inner layer to shield the thermal radiation of the target itself. (3) After testing, the attenuation of radar wave in 4G- 1 10GHz band (including commonly used 8mm, 3mm and 3cm bands) is greater than10 dB; ; The far infrared emissivity gradient of the coating reaches 0. 15: (4) The application range is 1. Stealth camouflage of weapons and equipment is to make a suitable structure according to the shape and requirements of the equipment, mainly for important targets such as ground planes, missile launchers, radar stations and missile launch vehicles in peacetime and wartime, as well as stealth camouflage of moving vehicles such as tanks, armored vehicles and artillery. It has a good camouflage stealth effect (avoiding the weakness that the existing radar camouflage network can only blur the radar characteristics of the target). 2. The engineering camouflage of command engineering, ordnance caves, missile silos and other important military projects has obvious characteristics of mouth exposure. A multi-band camouflage stealth tarpaulin is designed and manufactured according to the engineering needs, which has the advantages of good effect and low cost, and can easily open the cover obstacles and camouflage openings. For the exposed project, due to its good stealth performance, it can also reduce the target signal characteristics, reduce the hit rate of precision guided weapons, and realize the "last 300 meters" confrontation. Our company also specializes in the production and development of various shielding materials, such as shielding cloth, various radiation-proof clothing, maternity clothes, radiation-proof hats, radiation-proof aprons, microwave oven covers, radiation-proof cell phone covers, cell phone signal shielding covers, omni-directional conductive sponges, conductive fibers, conductive nets, conductive non-woven fabrics, conductive films, soft conductive materials, shielding rooms, shielding tents, radiation-proof shielding curtains, copper foils, aluminum foils and conductive cloth tapes.