Design and Development Process and Performance Evaluation of Fire-proof and Virus-proof Multifunctional Protective Clothing
2020-05-11
With the development of economy and society, the quantity and quality of fire have changed. A fire has destroyed dozens of lives, hundreds of thousands, millions and even tens of millions of dollars in property losses. In particular, malignant fire accidents of special types of work are still serious. More than 10 people died or died or seriously injured more than 20 people in one fire, and more than 10 fires occur every year in the whole country. Therefore, to strengthen the labor protection of workers of special types of work, we should start with the design, development and performance evaluation of protective clothing.
Recently, the project of "Research and Development and Performance Evaluation of Multifunctional Design of Protective Clothing" completed by Donghua University and Shenzhen Youputai Garment Technology Co., Ltd. won the second prize of "Textile Light" Science and Technology in 2013. The project has carried out the research and development of multifunctional design and performance evaluation of protective clothing. The developed protective clothing has many functions, such as fireproof and heat insulation, waterproof and ventilation, anti-virus and anti-bacterial. It is suitable for individual protection needs of emergency rescue such as disaster emergency scene.
Integrated protection against multiple hazards
It is understood that the general protective clothing is the use of intrinsic flame retardant fiber processing of flame retardant protective clothing. Essential flame retardant fibers, such as meta-aramid fibers, possess natural flame retardancy because of their special chemical structure. They are difficult to burn in the air. They extinguish themselves immediately after the fire source is removed, and the burning part carbonizes rapidly to form an insulating protective layer without melting, dropping or piercing, which can effectively reduce or avoid burns and scalds. This protective clothing has a single protective function and comfortableness. And poor functionality.
According to Li Jun, the project leader of the Department of Fashion Design and Engineering of Donghua University, the theoretical model of the functional design of protective clothing was first put forward in the project of "Research and Development of Multifunctional Design and Performance Evaluation of Protective Clothing", and the protective modes such as "layered insulation, multiple protection, function aggregation" were established to achieve the goal of integrated protection of multiple hazards. Thermal protection TPP and total heat dissipation THL are used for the comprehensive design of fabric system performance. At the same time, two-step optimization technology was developed to construct a composite fabric system consisting of an outer waterproof and breathable layer, an insulating layer and a comfortable layer; a fire-retardant and flame-retardant outer layer and an insulating layer were developed by using aramid sulfone fiber; a "three in one" technology was developed to develop a waterproof and breathable, anti-toxic and anti-bacterial selective permeable fabric with a "sandwich" structure; and a four-dimensional dynamic structure design method was proposed to carry out the design of the fabric. Innovative design of protective clothing for adaptability of operation activities.
"Fire Man" Helps to Improve the System
According to Li Jun, at the level of evaluating the overall protective performance of fabrics and clothing, the project has developed a characterization technology for comprehensive evaluation of the physical and chemical properties and comfortable ergonomic performance of protective fabric system, and explored and established a systematic and scientific system and method for evaluating the overall performance of protective clothing from fabric performance to clothing performance. Through the development of thermal protection performance testing device to simulate the tensile deformation of micro-space fabrics under clothing, this project reveals the evolution law of the comprehensive performance of multi-layer fabric system, and develops a device for evaluating the protective performance of high temperature liquid scald fabrics, and achieves the theoretical research results of high temperature liquid penetration protection of fabrics and their garments as a whole. At the same time, Donghua Fireman, an advanced thermal protection performance evaluation system for burning dummy clothing in fire field, is used as the substitute of biological human body to quantitatively predict the burned parts and extent of human skin in simulated fire field, and to objectively evaluate the overall thermal protection performance of protective clothing, fire protective clothing, thermal protective work clothing and other clothing.
It is understood that "Donghua Fireman" is the first burning dummy in China. In the high-risk environment of the fire site, excellent protective equipment can effectively reduce the damage to firefighters and escapees. Fabric combustion experiments are usually used in previous tests, but this experiment can not reflect the actual effect of its effect on human body, and it is easy to cause insufficient protection in use. The effect of protective clothing can be better understood by simulating fire environment with burning dummy. Donghua Fireman Laboratory is the first burning Laboratory of human body protection equipment in the world. At the same time, the dummy fully simulates the Chinese body structure, can accurately perceive heat flow under different moving postures, and accurately report the degree of skin burns. In addition, its joints can be adjusted to simulate the human activities of firefighters. This will help researchers to further improve the parts of clothing that are easy to pull and the parts that easily lead to fabric voids in rescue activities according to the physical characteristics of Chinese people. The research team of the laboratory will then analyze the data of the dummy after burning.
Hu Zuming, director of the Institute of Chemical Fiber Research, Donghua University, which develops protective clothing fabrics, said that the research and development of fabrics and combustion tests are just like "using the spear of the other to attack the shield of the other". Through the gradual upgrade of combustion testing, researchers will design more scientific and reasonable thermal protection equipment to effectively curb the thermal damage caused by fire, battlefield and thermal radiation.
The fastest way to apply production, teaching and research
"Our project team adopts the project leader system, through the establishment of sub-topics, to determine the responsibilities of all parties involved in cooperation, so as to achieve clear powers and responsibilities, clear tasks." Li Jun said. Aiming at the project of multi-functional design and performance evaluation of protective clothing, Donghua University relies on the theoretical advantages of Donghua Fireman Laboratory to establish and improve the thermal protection performance evaluation system of dummy clothing burning in the fire field in the production, teaching and research team composed of Donghua University and Shenzhen Youputai Clothing Company. YOUPTAI Company will feed back to Donghua University the experience of many years of professional research and development and production of special protective clothing, and the latest research results will be the most important.
