Research On The Development And The Performance Of The Anti-electromagnetism Radiation Wool Worsted Fabric

On the basis of previous researches, this experiment uses the stainless-steel filament and wool as raw materials to better understand the performance and the electromagnetism shielding mechanism of stainless-steel-containing fabrics. According to the shielding radiation worsted fabric’s design requirements, the experiment uses the core yarn, twisted yarn as the materials of anti-electromagnetism radiation worsted fabrics, at the same time, chooses the reasonable process parameters. At last the experiment gets15different specifications of fabrics after spinning and weaving process.Through testing and analyzing the shielding effectiveness of15stainless-steel-containing fabrics, the result shows that the fabrics’shielding effectiveness decreases as the frequency grows in the range from500MHz to2GHz, and the stainless steel filament plays a crucial role in the electromagnetism shielding by comparison. At the same time, fabric’s tightness also plays an indirect influence on electromagnetism shielding. The bigger tightness, the better will be the same contenting stainless steel fabrics’shielding effectiveness.Through the experiment, stainless steel filament and wool’s electromagnetism parameters which are permeability, permittivity and conductivity are tested respectively. By using coaxial reflection method, it’s able to extract the paraffin samples" Scattering coefficient which is respectively containing stainless steel filament and wool by Agilent8722ES network analyzer. Through the scattering equation, it can convert the scattering coefficient to material relative complex permittivity and permeability. In addition, through testing the stainless steel and wool’s conductivity, the result shows that the stainless steel has a high lever of permeability and permittivity in the range from50MHz to2GHz. but wool’s permittivity and conductivity is so weak that wool can almost be seen electrically insulating. Then, by using reflection coefficient representation, it can respond stainless steel filament and wool’s reflection degree to the electromagnetic wave. The results show the stainless steel filament reflects bout90%as well as have a certain degree of absorbing effect to the electromagnetic wave within50MHz to2GHz, and the data will represent a down trend with the frequency decreasing. However, the wool mainly has no reflection and absorbing effect to the electromagnetic wave.Four wear performance, respectively the performance of drape, permeability, and wrinkle resistance, fuzzing and pilling are also tested. Through grey relation theory analysis method, it can be deduced that fabric’s tightness plays a heavy influence on drapability and air permeability, and the content of stainless steel filament plays a much large influence on wrinkle resistance. The more stainless steel filament content, the worse fabric wrinkle resistance will be.At the same time, through the comparison to the performance of the stainless-steel-containing fabric and wool fabric, it is seen that the drapability and permeability of the stainless-steel-containing fabric is lower than that of pure wool fabric under the condition of the same warp/weft density. Then, with the fabric’s tightness bigger, the stainless-steel-contenting increasing, the permeability of fabric will not be good. At the same time, joining the stainless-steel filament will make the fabric’s crease recovery angle less than90°that may cause a great influence on the fabric’s appearance and quality. Through the comparison on the wear performance and the efficiency of process production between the core-spun yarn fabric and the twisted yarn fabric, the twisted yarn as the raw material of fabric development and producing will have an advantage, because the twisted yarn is easier to spin, weave and process. But there is a disadvantage that the core yarn is easily exposed.