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From Alpha to Lambda, in just over a year, the Greek letters used to name the new coronavirus are almost half used, and the new coronavirus is mutating at a staggering rate! However, at present, the research and development of protective clothing for new epidemic viruses in China and the world is far from enough. The development of antibacterial and antiviral protective clothing, reusable protective clothing, high barrier, high comfort and high strength protective clothing has become the focus of research and development of many scientific research institutions and enterprises. Fiber is one of the most important materials found by human beings today, especially the advanced functional fibers made by various high-tech techniques. They are naturally not fond of "following the rules" and have the courage to challenge various limits. Remarkable progress has been made in helping protective clothing to resist bacteria and viruses, reuse, high barrier, high comfort and high strength.

Let antibacterial antiviral clothes

Fly into the homes of ordinary people

To eliminate the viruses and bacteria that come into contact with every day, people have developed the habit of washing their hands frequently, but we cannot change clothes every day and every time. How to reduce the virus and bacteria carried on the clothing? Wear an anti-bacterial and anti-viral clothes, it will certainly reduce the possibility of getting sick. Aiming at this research direction, major scientific research institutes and enterprises have made great efforts in the research and development of antibacterial and antiviral functional fabrics.

Soochow University teamed up with Tianjin Polytechnic University and Handan Hengyong Protective Cleaning Products Co., Ltd.The combination of nano-silver and micro-nano graphene was prepared.Micro-nano structure complex hybrid agentIt has developed a new type of multi-functional protective non-woven materials and products with independent intellectual property rights. It is understood that the project has applied for three invention patents and achieved a series of technical achievements.

Anti-virus nylon developed by Fujian Yongrong Jinjiang Co., Ltd.

Fujian Yongrong Jinjiang Co., Ltd.Through the unremitting efforts of the team, successfully developedantiviral nylon. The product has passed ISO 18184:2014 "Test standard for antiviral textiles", and the antiviral activity rate is as high as 99.97%. It is understood that the product is the introduction of silver-loaded mesoporous titanium dioxide nanocomposites into nylon 6 fibers, resulting in nylon 6 fibers with antiviral function, the technology to fill the current market antiviral nylon 6 fiber gaps.

Nantong University and Xinfengming Group have developed high-efficiency antibacterial and antiviral polyester fibers.

New Fengming Group Co., Ltd., one of the largest polyester filament manufacturing enterprises in Nantong UniversityInnovation has been developed.High efficient antibacterial and antiviral polyester fiberIt is of great significance to promote the upgrading of traditional textile industry. It is understood that the product is the use of flexible modification technology in polyester filament fabric after alkali treatment to form 0.05-3 μm micropores, and then the nano silver solution adsorbed on its surface, the formation of fiber antiviral durability and anion slow release performance, played a stable and efficient role in killing bacteria and viruses.

Hangzhou Haijia Fabric Co., Ltd. has produced a barrier protection function of the sand release, roller blinds, wall cloth, scarves and other products.

Hangzhou Haijia Cloth Art Co., Ltd.As a comprehensive enterprise specializing in the development and production of high-grade decorative fabrics and home textile products, in recent years, it has also increased the application of new fibers and producedBarrier protection function of sand release, roller shutter, wall cloth, scarf and other products. Different from other enterprises, Haijia cloth art uses multi-target magnetron sputtering technology to achieve the purpose of antibacterial and antiviral plating silver layer on the surface of fiber, woven and non-woven fabrics on a large scale, in which fluorine-containing microporous membrane is used as a filter element to achieve efficient barrier to viruses and give the material good air permeability.

Beijing Saiolan Flame Retardant Fiber Co., Ltd. and Beijing Institute of Clothing Technology have introduced SOLFR fiber into medical protective clothing materials.

To "protect the earth, save lives" for the purpose of the enterpriseBeijing Saiulan Flame Retardant Fiber Co., Ltd., United Beijing Institute of Clothing TechnologyinnovativelyThe company's unique silicon nitrogen flame retardant regenerated cellulose fiber (SOLFR fiber) into the medical protective clothing materials.. It is understood that SOLFR fiber has the function of active sterilization and virus killing. This function is not based on the introduction of antibacterial agents, but on the physical sterilization of far infrared emission groups, which has the characteristics of safety and non-toxic side effects. According to the relevant person in charge of the project, the SOLFR fiber is made into a microporous composite film with a suitable aperture and introduced into the outer layer of the protective clothing fabric, which can play a good moisture absorption and perspiration function. Under the protection of the inner and outer double-layer material, it not only makes the wearer feel comfortable, but also can intercept the bacteria and viruses that leak through the net.

The State Key Laboratory of Fiber Material Modification of Donghua University joined hands with the Institute of Science and Technology of Fudan University to prepare fiber-HOF composites.

In response to the mutating virus,State Key Laboratory of Fiber Material Modification, Donghua University, in collaboration with Institute of Science and Technology, Fudan University, using a new blending melt spinning method, prepared.fiber-HOF compositesIt is used to make medical protective clothing for chemical reagents and new viruses. According to the relevant person in charge, the project will enable my country to reach the world's advanced level in the face of potential chemical weapons warfare (reaching the US DARPA standards for similar products). It is understood that this new type of protective clothing has a revolutionary breakthrough to the traditional protective clothing, which is to realize the active defense of chemical warfare agents and viruses, so as to achieve the purpose of easy cleaning, reducing residues and repeated use.

Reusable protective clothing

Give medical staff a strong guarantee

At the beginning of 2020, due to the sudden outbreak of the epidemic, China's reserves of epidemic prevention materials are mostly disposable supplies, and the number is limited, medical staff in order to save use, a set of protective clothing put on as far as possible to complete the entire work cycle before taking off, and some even repeatedly wear three or four times before discarding. In order to alleviate the supply shortage caused by the large consumption and long production cycle of disposable medical protective clothing, meet the clinical demand for reusable medical protective clothing and reduce the cost of medical waste treatment, many enterprises have increased the research and development of reusable protective fabrics.

Jiangsu Aoshen New Materials Co., Ltd. used dry spinning technology to prepare polyimide medical protective clothing substrate.

Jiangsu Aoshen New Material Co., Ltd.It is a national high-tech enterprise specializing in the research and development and production of high-performance polyimide fibers and back-up products. In view of the problems reflected in this epidemic, the enterprise innovatively adopts dry spinning technology to produce medical polyimide fibers and prepare polyimide medical protective clothing substrates. Combined with the preferred medical protective clothing film materials, the bonding technology between the substrate and the film layer has been developed,Developed medical protective clothing that can be reused more than 25 times.

Jiangsu Sunshine Group, Donghua University, Jiangsu Shenghong Textile Testing Center Co., Ltd.The use of polyester fiber diversity developedFull polyester protective fabric. According to the relevant person in charge of the project, the polyester fiber is not ordinary polyester fiber, but orange petal polyester. It is pressed into non-woven fabric by spunbond technology, and a single orange petal polyester fiber is split into multiple superfine polyester fibers by spunlace technology, which increases the specific surface area of the fiber, enhances the softness and air permeability of the non-woven fabric, and can still maintain good mechanical properties after repeated machine washing for 10 times, and maintain the waterproof grade 4, and its breaking strength, elongation at break is higher than the national standard. The single component characteristics of all-polyester also provide a relatively simple and efficient resource-based raw material for the recycling of discarded textile products.

In fact, before the outbreak of the epidemic, many enterprises in China have produced reusable protective clothing, but the national standards in this field are still blank, users lack of national standard control, it is difficult to judge the quality and performance of products, have to use a large number of disposable protective clothing. In this regard, the Textile Industry Standardization Institute and the National Advanced Functional Fiber Innovation Center have proposed and formulated unified quality standards for reusable medical protective fabrics and new polytetrafluoroethylene materials for the first time through research, which will further improve medical and health use. The quality standard system of textiles and new textile materials fills the gap in the field of reusable medical protective fabrics in China.

High barrier, high comfort and high strength protective clothing

Solving traditional problems

"The most relaxing and comfortable time every day is when you take off your protective clothing." During the epidemic, the words of a medical worker made many people cry. We know that a good seal certainly provides better protection against viruses, but it makes the wearer extremely uncomfortable. For some disadvantages such as the traditional protective clothing is not breathable, the new fiber industry has effectively solved this problem.

Zhejiang blue sky sea textile and apparel technology co., LTD. Manufacture of comfort anti-static virus isolation fabric.

In recent years, a popular "xx looking for Lan Xiang" advertisement has made people remember "Lan Xiang" quickly ". In the field of protective clothing, there is also a nationally renowned "Lanxiang" brand--"Lanxiang" comfort anti-static virus isolation fabric. This product is madeZhejiang Lantianhai Textile & Apparel Technology Co., LtdManufacturing, is specifically for medical protective clothing airtight and research and development with anti-static, virus isolation, good moisture permeability, reusable multi-functional medical protective clothing fabric. It is understood that the fabric has been exposed to ultraviolet light for five cycles (equivalent to 10 years) in GB/T 31899-2015 textile weather resistance test, and can be reused for more than 5 times under high-temperature disinfection and washing at 75 ℃, with a comfortable moisture permeability ≥ 8000g/(m2 d). The project has passed the relevant tests of Guangzhou Inspection, Testing and Certification Group Co., Ltd. and reached the index requirements of the project task book. Among them, the isolated virus and comfort performance are both excellent, and have been tried out in Nanxun Hospital, Huzhou High-speed Railway Export and other places.

Dalian Rui Guang Nonwovens Group Co., Ltd. has developed a composite high-strength protective nonwovens.

Generally speaking, the traditional disposable medical protective clothing is still insufficient in terms of mechanical strength. Medical staff need to make great efforts when transporting patients, which will lead to tearing of some disposable medical protective clothing and potential safety hazards. In response to this problem, it has been ranked as the top 10 in China's nonwovens industry for ten consecutive years; the world's top 40 nonwovens manufacturers ranked 30thDalian Rui Guang Nonwovens Group Co., Ltd.developed aComposite high-strength protective nonwovens.Vice Chairman Gu DongzhaoIt is introduced that the product makes thin wood pulp fiber layer, double-layer thin spunbonded cloth and breathable membrane into high-strength, low-gram-weight four-layer composite material through glue composite technology, which has obvious moisture absorption and ventilation effect. Through third-party testing, the indexes such as strength, filtration efficiency, synthetic blood penetration resistance, moisture permeability, surface moisture resistance and water permeability resistance meet the GB19082 standards. In addition, the project product wood pulp layer using thin wet-laid technology, wood pulp fiber through the addition of short fibers, increase the mesh strength, spunlace consolidation to form a thin wet-laid wood pulp fiber layer, break through the wet-laid thin-laid technology. At present, the project has been industrialized. With its outstanding contribution to the prevention and control of the epidemic, the Dalian Ruiguang Party Branch was awarded the "National Advanced Collective to Fight the New Coronary Pneumonia Epidemic" and the "National Advanced Primary Party Organization".

Tianjin University of TechnologyThe use of flash spinning prepared in line with the international standards of medical protection materials.Flash-evaporated non-woven medical and health protective material.Xia Lei, Associate Professor, Tianjin Polytechnic UniversityIntroduction, flash spinning technology was invented by American scientists in the 1950 s. It is a method for preparing high-tech nonwovens. The nonwovens prepared by this method combine the characteristics of paper, film and cloth. It has the characteristics of light weight, high strength, waterproof, breathable, tear resistance, puncture resistance, etc., and has a wide range of applications, especially suitable for applications in personal protection, medical packaging, defense, construction, printing and other fields. However, the technology is more complex, and the products are mainly imported from the United States, China urgently needs to make a breakthrough in this field. The research on flash evaporation technology in Tianjin University of Technology has been carried out for more than ten years, and some progress has been made in process, theory, equipment and products. Ultra-high molecular weight polyethylene is used as fiber-forming polymer, dissolved in a new solvent system and then flash spinning. The prepared Navier fibers and nonwovens have higher strength and can be applied in a wider range compared with traditional products. It is understood that at present, the R & D team of Tianjin University of Technology has also tried to add other functional materials to the spinning solution in the experiment, and successfully prepared fibers and nonwovens with various functions. This improved experimental method has broadened the application field of flash spinning nonwovens.

Comfortable, thin, antibacterial and reusable fiber materials for medical protection prepared by Dalian Polytechnic University.

Dalian Polytechnic UniversityBased on the preparation technology of composite functional fibers and protective fabrics and products such as high strength, high dimensional stability, wear resistance, tear resistance, high comfort, stain resistance and easy cleaning, through four dimensional design, namely macromolecular structure design, fiber composite form design, fiber supramolecular structure design and fabric structure design, through copolymerization, composite spinning, finishing, coating combination technologyComfortable, lightweight, antibacterial and reusable fibers and fabrics for medical protection with micro-raised high-density structureIt solves the technical problems of poor comfort, single disinfection means and non-reusable use of existing medical protective fibers and their products, and realizes the synergistic unity of fabric hydrophobicity, breathability and moisture permeability. The fabric has good softness, bacteriostasis and virus isolation, and provides a new material for medical protective clothing, surgical clothing, isolation clothing, etc.