The most basic performance requirements for textiles are “warm protection†and “coveringâ€. The so-called "cover" is to require textiles to have good visual shielding performance. Dark heavy fabrics do not have visual obscuration problems, but summer light-colored fabrics, especially white fabrics, are common in underwear and body skin exposure problems, resulting in a wearer's appearance. The anti-seeding fiber suitable for summer light-colored and thin clothing developed by the General Logistics Department's Quartermaster Equipment Research Institute can effectively solve this problem and create a real economic benefit through the combination of production, education and research.
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The General Logistics Department's Quartermaster Equipment Research Institute and its partners have developed a multi-scattering approach to the problem of poor visibility of light-colored lightweight fabrics, exposure to underwear and body skin, resulting in the indecent appearance of standard clothing, especially navy white clothing dressers. The anti-transparent polyester fiber and the two-component elastic anti-permeability fiber which combines the spinnability and the wool-like feeling, the visual shielding effect of the white or light-colored light-weight fabric obtained is double-layered and the conventional fabric level of the same specification, and the light color is light and thin. The international problem of poor visual obscuration of fabrics. Independently developed wool-like polyester filaments and staple fibers, two-component elastic anti-transparent filaments and staple fibers, and anti-viscosity staple fibers with excellent anti-transparent effect; and produced visual shading by optimizing yarn and fabric structure. High-strength filament or staple blended cotton wool, woven and knitted fabrics. Successfully solved the contradiction between the visual obscuration, comfort and style of light-colored and light-weight fabrics, with four breakthroughs.
1. Established scientific theories and technical ideas of textile visual obscuration
From the perspective of visual physiology and physics, the theoretical relationship between textile visual obscuration and material properties, textile structural parameters and environmental factors was established. It was clear that light and light-colored fabrics could not adopt absorbing, increasing the thickness and relying on the interface between fiber and air. Light scattering achieves a barrier effect. It is proposed that the technical idea of ​​light scattering inside the reinforced fiber should be adopted to develop a complex fiber cross-section structure with multiple scattering paths, and at the same time, the fiber is finely denatured, the surface is roughened, the yarn is porous, and the fabric perforation is twisted to achieve light color. Light-proof fabric's anti-transparent effect.
2. Innovation uses Mie scattering theory to optimize the particle size distribution of high refractive index powders
For the first time, the Mie scattering theory was used to calculate the scattering state of powders with different refractive indices and different particle size distributions. Different kinds of different refractive index powders were tested for blending and detection of shielding properties, which were corrected by human eye spectral light efficiency curve. After that, it is found that the TiO2 particle size has an optimum anti-seepage effect in the range of 278 nm to 571 nm. This particle size distribution is applied to polyester anti-vibration fibers and two-component elastic anti-reflection fibers to obtain a good anti-transparent effect.
3. Developed a series of anti-seepage fibers and visually shaded textiles
Innovatively designed with 8 thin-walled diaphragms containing a large number of high-refractive-index powders, 16 macro-reflective interfaces and numerous micro-reflective interfaces for complex fiber cross-section structures, allowing light to intercept at any radial incidence, entering each The light in the separated area is multi-reflected and absorbed, so that the anti-transparation effect is greatly improved; the area of ​​the high powder content is small on the surface of the fiber, and the wear on the equipment is small; the orange-shaped composite spinning equipment with excess capacity in the country can be used slightly. It was modified for spinning. The anti-transparent polyester composite wool-like filaments and short fibers, two-component elastic anti-transparent filaments and short fibers thus produced are applied to pure-woven and blended woven and knitted fabrics such as wool and cotton, and have good properties. The visual shading effect, combined with comfort and feel, is widely used in military, industrial uniforms and sportswear fabrics.
4. Established a visual masking evaluation method for fabrics
It is proposed that the visual obscuration of fabrics is not only related to the energy permeability of light waves, but also related to the imaging ability of light waves. The anti-transmission rating standard was designed, and a method for quickly evaluating the visual obscuration performance of the fabric was established, which was used for the anti-permeability detection of military uniform fabrics.
Anti-fluoroscopy fabric development is imminent
According to international practice, naval officers and men should wear white uniforms during the summer. In order to avoid the problem of underwear exposure of white clothing, the navy of various countries used heavy fabrics such as polyester-cotton small canvas as the summer clothing fabric, which has poor comfort. Some African navies use lighter and thinner fabrics, but the underwear is exposed badly, the pocket cloth is exposed, and the objects in the pocket are displayed, which affects the military appearance. China's previous generation of navy's original white clothing had to be equipped with lining cloth or polyester threaded trousers to avoid underwear and body skin exposure, but the wearing comfort was very poor. Therefore, the navy white uniforms at home and abroad are chosen between “transparent†and “thickâ€, lacking white fabrics that are thin and impervious, and that combine visual obscuration and comfort.
According to Shi Wei, senior engineer of the Military Equipment Research Institute of the General Logistics Department, the Chinese Navy wears the summer white uniform to connect with the world, but it is trapped in the thickness of the clothing. The navy clothing fabrics like Southeast Asia and Thailand are particularly heavy and the clothing is dull. Compared with foreign military personnel, the skin quality of our naval soldiers is not resistant to the sun and is not resistant to humidity. Therefore, there is an urgent need for a fabric that is anti-seeing and thin.
Combining production, study and research to create economic benefits
The research and development research and development team for anti-seeding fiber includes: Zhoushan Xinxin Chemical Fiber Co., Ltd., Zhejiang New Textile Co., Ltd., Jiangsu Sunshine Group Co., Ltd., Qingdao Zhifa Group Co., Ltd., Zhejiang Chunjiang Light Textile Group Co., Ltd., West Lake Technology Co., Ltd. Military Equipment Research Institute, Donghua University.
In 2007, the whole army changed the new military uniforms, using this technology to produce navy white summer uniforms, summer pants (skirts), sailor uniforms, soldiers spring and autumn uniforms fabrics, anti-transparence effect to achieve male soldiers wearing black, red sports vests, female soldiers When wearing a flower bra, the white shirt can completely cover the level of the underwear, and it has withstood the test of the navy white square in the 60th anniversary of the National Day, requiring the military to be dignified and not exposed to the underwear, and the comfort is good, the air permeability is excellent; easy to wash and dry Resistant to the sun and not yellow; In 2011, all military officers distributed summer dresses, using this technology to develop elastic anti-transparent fabrics for the whole army, especially for navy white dresses, reaching a level of thin, impervious and comfortable, ending In the past, the naval officer added a history of polyester spun pants to white pants.
At present, anti-perspective fiber fabrics are mainly used for direct sales in China. I am responsible for the duties and division of labor of various departments. The People's Liberation Army has all adopted it, and the public security department will apply it in the future. I believe that the future and future of China's textile industry should rely on the improvement of technology, and technology must be close to the needs of the market. Enterprises and scientific research institutions work together to continuously develop and improve products. In the past, our aim was to prevent see-through. Now, with the maturity of technology and the deepening of scientific research, the effect of anti-UV and anti-heating of fiber is also very obvious. The same kind of dye is used to dye anti-seepage fiber fabric and ordinary fabric, and the temperature of anti-fluorination fabric is raised. The speed is slow and the temperature is about 5 °C lower. ——Shenzhen, Senior Engineer, Military Equipment Research Institute, General Logistics Department
My postdoctoral thesis is based on the prevention of perspective in Jiangsu Sunshine Group, so I am very pleased to continue to study the development of anti-seepage fiber technology. The main body of technology research and development and support is the General Armament Equipment Research Institute and Donghua University. Among them, I am mainly responsible for the work of powder screening. In fact, many people talk about nano-materials, but the powder is not used in the nano-scale. Nano-powder Once the experience is worn, the powder should not be too big or too small. If the powder is too small, it will pass through the gap of the fabric and be lost. Too large will affect the appearance of the fabric and the effect of anti-perspective. In the actual research process, the Mie scattering theory and the function statistical method were successfully applied, and the diameter range of the powder was well determined, and the anti-seepage effect was remarkable. ——Wang Ni, Associate Professor, Donghua University
Zhoushan Xinxin Chemical Fiber Co., Ltd. is a military accessory enterprise for military clothing. Since 2009, the company has started to use the anti-perspective chemical fiber and visual shielding textile research and development technology jointly developed by the General Logistics Department's Military Equipment Research Institute and its partners. The production of anti-seepage deformation filaments, all anti-seepage chemical fibers on the market are products of our company. Up to now, the company has produced a total of 2058 tons of special anti-seeding filaments for navy, with an output value of more than 60 million yuan. ——Zhang Zhengsong, General Manager of Zhoushan Xinxin Chemical Fiber Co., Ltd.
Since 2007, our company has been involved in the research and development of anti-seepage fiber technology. We have been mainly responsible for cotton and chemical fiber blended fabrics, and also for the production of uniforms such as military and high law, all naval suits and pants. Shirt fabrics are our company's products. In order to ensure the quality of the fabrics and improve the grades of the products, the company has specially set up a fully enclosed air-conditioning workshop to produce not only the fabric pollution, but also the temperature and humidity. The stability, in the navy white shirt, navy white summer uniforms, high-method system light blue shirt fabric, etc., has accumulated a total of 5.788 million meters of uniform anti-transparent fabrics, and nearly 500,000 meters for other civilian fabrics The output value is 42.12 million yuan. ——Zhu Mingying, General Manager of Zhejiang New Textile Co., Ltd.
Our company started the research and development of elastic fiber very early, but it did not succeed in cooperation with Japanese researchers for two years. Until 2008, when the PLA changed the second dress, it needed an elastic fiber. The Institute joined us in research and development and developed successfully in only 40 days. In 2009, the company began to participate in the research and development and production of anti-seepage fiber technology, and achieved the success of anti-perspective treatment of elastic fibers. At present, our company mainly undertakes the production of anti-perspective worsted fabrics. So far, it has produced a total of 1.756 million meters of wool-proof anti-transparent fabrics and exported more than 6 million US dollars. ——Wang Hongming, General Manager of Jiangsu Sunshine Group
Good products go to the international market
It is reported that the anti-perspective fabric has successfully opened up the Middle East market. Due to the hot climate and strong sun exposure, the traditional Arabian robes can block the sunlight, but the clothes are heavy and have poor moisture wicking. The fabrics are very popular among the locals. The orders for Arab robes are constantly on the order, and the anti-seeding fabrics have also been successfully applied to military and police fabrics in the Middle East (Kuwait, Jordan) and other countries. African countries are gradually promoting them. South African military officers are replacing uniforms. Some fabrics are also made of anti-seeping fabric.
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