Is needle-punched non-woven fabric felt?

Is needle-punched non-woven fabric felt? Felt can only be regarded as a kind of needle-punched non-woven fabric. The needle-punched non-woven fabric is punctured in rows, and the strength is determined according to the degree of the thorn. If the strength you want to do is very good, the strength is very poor. For example, the needle-punched non-woven fabric used in leather base cloth is very dense and strong. The production of non-woven fabrics by needle-piercing method is entirely through a mechanical action, that is, the needle-piercing effect of the needle-piercing machine, and the fluffy fiber mesh is reinforced and combined to obtain strength. The basic principle is: using triangular section (Or other sections) The needle with the inverted hook on the edge of the edge repeatedly punctures the fiber net. When the hook passes through the fiber net, the fiber surface and the local inner layer fiber are forced to penetrate into the fiber net. Due to the friction between fibers, the original fluffy fiber net was compressed. When the needle withdraws from the fiber net, the punctured fiber bundle leaves the reverse hook and stays in the fiber net, so that many fiber bundles entangle the fiber net so that it can no longer return to its original fluffy state. After many times of acupuncture, quite a number of fiber bundles are pierced into the fiber net, so that the fibers in the fiber net are entangled with each other to form a needle-piercing nonwoven material with a certain strength and thickness. The needle-punched nonwoven process forms include pre-puncture, main puncture, pattern acupuncture, ring acupuncture and tubular acupuncture.