The difference between non-woven fabric and felt

What is the difference between non-woven fabric and felt? Felt can also be called non-woven fabric, because the equipment and process principles used in their production are similar, but the felt production process and equipment are quite simple and are basically produced from waste materials. The so-called non-woven fabric is a non-woven fiber fabric made by non-woven non-woven methods, such as needle punching, spunlace, melt blown, etc. Or there are wet and dry methods. Felt and non-woven fabrics are both non-wovens. The difference lies in the custom classification. The habit of high density and high thickness is called felt. Felt generally refers to thicker products, more than 500 grams per square meter, 2-5mm can be called felt or It is called non-woven fabric. The habit of less than 1MM is called non-woven fabric. Non-woven fabric felt is usually formed by needle punching. Even if it is pressed, there are pinholes on the surface, and the middle is cut. It is more obvious that the fabric surface and the section are perpendicular to the chemical fiber Stretching phenomenon, needled felt is too thick and there is layering phenomenon, because it is a composite needle punched with several layers, rather than formed by needle punching, felt does not have the above characteristics. In fact, it is just a habit. The traditional felt production is made by using the felting characteristics of wool, that is, the flakes of wool are rubbed and felted with water and heat. There is no absolute definition of the name of felt and non-woven fabric.