With the development of economy and society, there have also been changes in the quantity and quality of fire. It is not uncommon for a fire to destroy dozens of pieces, hundreds of lives, and hundreds of thousands, millions, and even ten million yuan in property damage. In particular, the vicious fire accidents of special types of work are still serious. More than 10 fires occur each year in the country with more than 10 deaths or deaths and serious injuries of more than 20 fires. Therefore, to strengthen labor protection for workers of special types of work, it is necessary to start from the design, development and performance evaluation of protective clothing.

Recently, the “Multifunctional Design R&D and Performance Evaluation of Protective Clothing” project jointly completed by Donghua University and Shenzhen Utopai Apparel Technology Co., Ltd. won the 2013 “Textile Light” science and technology second prize. The project was protected. The multi-functional design, research, development and performance evaluation of the garments, and the protective clothing developed have various functions such as fire prevention, heat insulation, waterproof and breathable, anti-virus and anti-bacterial, etc., and are suitable for individual protection needs of emergency rescue scenes and emergency rescue.

Multiple hazards one protection

It is understood that the general protective clothing is flame-retardant protective clothing that uses intrinsically flame-retardant fibers. The intrinsically flame-retardant fibers represented by meta-aramid are natural flame-retardant due to 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 is rapidly carbonized to form a heat-insulating protective layer. , Without melting, dripping or puncturing, it can effectively reduce or avoid burns and burns. This kind of protective clothing has a single protective function and poor comfort and functionality.

According to the project leader Li Jun, director of the Department of Fashion Design and Engineering at Donghua University, the "multi-functional design and development of protective clothing and performance evaluation" project first proposed a theoretical model for the functional design of protective clothing, and established "layered insulation, multiple protections. , function build-up" and other protection models, to achieve a comprehensive protection of a variety of hazards. The thermal protection performance TPP combined with the total heat dissipation THL was used to comprehensively design the fabric system performance. At the same time, the two-step optimization technique was developed to construct a composite fabric system consisting of an outer waterproof breathable layer, a heat insulation layer, and a comfort layer; the flame retardant outer layer and the heat insulation layer were developed using arylsulfone fibers; and the “triple play” was developed. Technology, development of a waterproof, breathable, anti-virus, antibacterial and selective permeation fabric with “sandwich” structure; a four-dimensional dynamic body structure design method is proposed, and innovative design of protective clothing with adaptability to work activities is carried out.

"Human" helps improve the system

According to Li Jun's introduction, in the evaluation of the overall protective performance of fabrics and garments, the project developed a characterization technique that comprehensively evaluates various physical and chemical properties and comfortable ergonomic performance of protective fabric systems, and explored the establishment of systematic scientific protective clothing from fabric properties to overall garments. Performance evaluation system and method. The project has developed a thermal protection performance tester for the simulation of the tensile deformation of micro-space fabrics under simulated clothing, revealed the evolution of the overall performance of multi-layer fabric systems, and developed a device for evaluating the scald protection performance of fabrics with high-temperature liquids, achieving high temperatures in fabrics and clothing. Theoretical research results on liquid permeation protection. At the same time, it uses the advanced technology of fire field burning dummy clothing thermal protection performance evaluation system “Donghua Fireman” as a substitute for biological human body to achieve quantitative prediction of human skin burn site and degree in simulated fire field, protective clothing and fire protection. The overall thermal protection performance of garments, thermal protection workwear, etc. was objectively evaluated.

It is understood that "Donghua Fireman" is China's first burning dummy. In the high-risk environment of the fire scene, excellent protective equipment can effectively reduce the damage to firefighters and evacuees. In the past, the fabric burning test was generally used for testing, but this experiment could not reflect the actual effect on the human body, and it was easy to cause insufficient protection during use. Using the burning dummy to simulate the fire environment experiment can better understand the use of protective clothing. "Donghua Fireman" laboratory is the world's first fire body human body protective equipment combustion laboratory. At the same time, the dummy completely simulates the Chinese human body structure, can accurately sense high-temperature heat flow in different active postures, and accurately report body skin burns. In addition, its joints can be adjusted to simulate the human activities of firefighters. This will help the researcher to further improve the easy-pull clothing parts in the rescue activities and the gaps in the fabrics according to the physical characteristics of the Chinese people. The laboratory research team will then analyze the data of the dummy after burning. .

Hu Zuming, director of the Chemical Fiber Research Institute of Donghua University who developed protective clothing fabrics, said that fabrics research and development and combustion tests are just like "spearing one another and attacking another". Through the escalation of the combustion test, the researchers will design the thermal protection equipment more scientifically and rationally to effectively curb the thermal damage to the human body caused by dangerous environments such as fire, battlefield and heat radiation.

It is reported that the results of the "multi-functional design and development of protective clothing and performance evaluation" project have been widely used in the production of flame retardant clothing, protective clothing, chemical protective clothing and other protective equipment products.

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