Study On Content And Basic Properties Of Waste Cotton

so far,there isn't a perfect and convincing testing method and system about waste cotton in China even in the world.So we need to research carefully and deeply on the waste cotton.This article researched the waste cotton's basic components and the physical and mechanical properties,And on this basic,establish a standard for testing waste cotton.This article mainly discussed waste cotton's appearance and properties,and so on,from five sides.In the first part,it introduced the kinds and appearance of waste cotton.The appearance is the immediate method to distinguish them.There are many differences in their appearances.In the second part,we mainly researched the impurities of the waste cotton.It included the impurities' amount and kind.By comparing the differences of the impurities,we knew about the content of the impurities of every kind of the waste cotton. It is important to identify every kind of waste cotton.In the third part,we researched the physical and mechanical properties of the waste cotton by HVI(High Volume Instrumentation).The performance indicators include length,SCI,Micronaire,Length Uniformity,SFI,Fiber Strength,Elongation,Moist,Rd(Reflectance),+b,Cotton Color Grade,and so on.It is different of every performance indicators.The forth part researched that when in ring spinning and vortex spinning how to rank ordering from good to the poor by gray correlation analysis.The fifth part introduced the content of substance that can't dissolve in sulphuric acid,and the content of ash in the waste cotton.,and the result showed that the contents of them are too many.So when we use them,we should pay attention.