Study On Protective Performance And Comfortability Of Silk Mask

In the 21 st century,quality of people's life is gradually improving,the environment is also gradually changing,haze and infectious diseases are also affecting people's health.As a powerful weapon of anti-enemy health care,masks have also attracted the attention of researchers.In the "wartime" when epidemic control is serious,the first choice of wearing masks is high filtration protection performance,but high comfort performance should not be ignored.In daily life,as an excellent tool to keep warm and keep out the cold,prevent infection and isolate germs,masks should be paid attention to by people.Nowadays,there are so many protective masks on the market that it is difficult for people to find suitable masks.The suitability of the mask should not only meet the requirements of filter protection performance,but also meet the comfort requirements.The comfort of the mask includes the structural comfort of the mask and the comfort brought by the mask fabric to the user.the former is largely related to the fit(version)and aesthetics of the mask,while the latter is the main research content of this paper.Therefore,based on the material and structural parameters of the mask,this paper designs a silk protective mask and studies its filtration performance and comfort performance.In this paper,the basic structure,filtration performance and comfort performance of 8 typical daily protective masks in the market are analyzed and tested,and then the relationship between structural layer parameters and performance is analyzed and studied.the basic properties,filtration performance and thermal and wet comfort properties of the selected 10 kinds of materials were determined,and the osculating value method was used to evaluate the comprehensive performance of the test results.In order to improve the performance of the mask,using orthogonal design,three series of 25 kinds of multi-layer composite fabric systems were designed to simulate the composition of the mask,and their filtration performance and comfort performance were tested and analyzed.the test results are selected by osculating value method,and the optimal combination is obtained.The main conclusions are as follows:(1)For several kinds of daily protective masks,the filtration performance of the mask is mainly affected by the fiber diameter of the filter layer,and the filtration performance of the mask increases with the decrease of the fiber diameter.the overall air permeability of the mask is mainly affected by the inner layer of the mask,and the overall permeability tends to increase with the increase of the permeability of the inner layer of the mask.The overall moisture permeability of the mask is mainly affected by the filter layer,and with the increase of the moisture permeability of the filter layer,the overall moisture permeability tends to increase.(2)For single-layer fabric,the fiber diameter of the three filter materials is only about 2.5?m,and the fiber diameter distribution is more concentrated,and the porosity is more than 80%.In terms of filtration performance,melt-blown nonwovens is better than polytetrafluoroethylene composite melt-blown fabrics.The air permeability of silk fabric is better than that of polyester fabric and cotton fabric,and that of plain crepe satin is better than that of crepe de Chine and twill silk.The moisture permeability of silk fabric is better than that of polyester fabric and cotton fabric,and that of twill fabric is better than that of plain crepe satin and crepe de Chine.Polyester fabric and pure cotton fabric have the best thermal insulation and the worst thermal comfort,while silk fabrics have the worst thermal insulation and the best thermal comfort,and the law of moisture resistance is similar to that of moisture permeability.The comprehensive performance of plain crepe satin is better than that of crepe de Chine and twill,and that of silk fabric is better than that of polyester fabric and cotton fabric,and the performance of 68 g plain crepe satin is the best.(3)In the aspect of multi-layer composite fabric,the influence of three structural layers on the filtration efficiency of multi-layer composite fabric is in the following order: filter layer >outer layer > inner layer.S series S6 is the best combination,the combination mode is: inner layer a2(plain crepe satin),filter layer D1(polypropylene melt blown cloth),outer layer a2(plain crepe satin series M1 is the best combination,combination mode is the same as S series optimal combination,N series N8 is the best combination,combination mode is: inner layer c2(pure cotton),filter layer D1(polypropylene melt blown cloth),outer layer c2(pure cotton).Among the comfort properties,the air permeability of the multi-layer fabric with polypropylene melt-blown cloth is the best,the thermal resistance of the multi-layer fabric has the greatest correlation with the thermal resistance of the inner and outer fabric,the thermal comfort of S series fabric is the best,M series is the second,and N series is the worst.The multi-layer fabric with D2 filter layer(25g PTFE film composite melt blown cloth)has the lowest combined wet resistance and the best moisture permeability.Among the three series of combinations,the comprehensive properties of S1,M6 and N1 fabric combinations are the best,and the results of the three fabric combinations are S1:a1,d1,a1,b1,N1,a2,respectively.That is,the comprehensive performance of the filter layer D1(polypropylene melt-blown nonwovens)is the best,and the combination of silk fabric with the same inner and outer layer has the best comprehensive performance.the performance of multi-layer fabric is related to the performance of inner and outer fabric,but it is not completely consistent.