Characteristics and compression resistance of military tents1

my country is a country with frequent natural disasters, and the economic losses caused by disasters each year amount to 100 billion yuan. After a disaster occurs, in order to meet the basic living needs of the victims, tents are one of the more commonly used methods for short-term resettlement of the victims. When disaster relief tents are arranged in large-scale groups, the distance between the tents in the group should be indwelled for the purpose of travel, fire prevention and evacuation of the disaster victims. However, after the disaster, various temporary resettlement sites often have many phenomena such as excessive concentration of people, poor traffic, and small distance between tents and fire prevention. Once a fire occurs, it is easy to cause“Burn the company”. Among the various current fire protection regulations in my country, the regulations on the fire distance of temporary houses, especially military tents, are still small and perfect. Therefore, the author has carried out real-size tent fire experiments and computer simulation research, and obtained relevant data, which can be used as an important basis for scientifically determining the fire separation distance of tents. Most military tents are suitable for use in three seasons from spring to autumn, they take into account ventilation, insect protection and heat preservation; there is also a tent that is entirely made of net, of course, this net is opaque, it is suitable for summer and in Use in warm and humid areas. If you are camping and camping, rain protection and ventilation are very important. There is also a four-season tent that has little regard for ventilation, but usually provides a vent so that meals can be cooked in it. Theoretically, it can keep the tent warm or cool well and insulated from the outside environment. Conventional performance The conventional performance of coated fabrics for tents mainly considers four indicators: breaking strength, tearing strength, color fastness to light, and color fastness to water. Breaking strength and tearing strength Because the coated fabric for tents is in a covered state or suspended state during use, it has to bear various tensions such as metal brackets and ropes, so the fabric has greater strength, mainly considering the breaking strength and tearing strength. Strong two indicators. The breaking strength refers to the strength of the yarn when the yarn breaks when directional stretch is applied to the warp or weft direction of the fabric. Tear strength refers to the large external force required for the yarn to break sequentially when the fabric has a tear opening. The higher the breaking and tearing strength, the stronger and more durable the fabric, and the better the wind and compression resistance. Coated fabrics for waterproof tents are exposed to the environment and are often affected by rainwater, so they are required to have good waterproofness. There are many test methods for measuring the waterproof performance of textiles at home and abroad, but they are mainly divided into two aspects. On the one hand, it is to measure the resistance of the textile surface to wetting by water-surface wetting resistance, and on the other hand, it is to measure the resistance of textiles to water penetration-hydrostatic pressure. The hydrostatic pressure was measured in accordance with the test standard: GB/T4744-1997 'Hydrostatic Pressure Test for Determination of Impermeability of Textile Fabrics', and the water pressure rising speed was 6kPa/min. Due to the wind, sun, rain, etc., the coated fabric for tents often damages the coating during use, and the coating is damaged or peeled off, which affects its durable use. Therefore, in addition to considering the original hydrostatic pressure, it must also be assessed. Low temperature and surface moisture resistance after aging.