Needle felt is a method of waterless felting of animals or other fibers. Using a special barbed needle to poke on the fiber, after continuous puncture, the wool is rubbed against each other, so that the internal fibers are better entangled together, thereby achieving the felting and combining to form the felt.
The outer surface looks soft and wool, and the surface is covered with many scales that we can’t see with the naked eye. When these scales encounter hot water, they will open and erect. If the scales are entangled with each other and tightly contracted together, and then pressed, rubbed, and rubbed by external force, the wool becomes a felt state.