The principle of PRINCIPLE processing
The principle of spunlace reinforcement of nonwoven webs is similar to that of needle-punching, except that it does not use needles; instead, it employs multiple fine water jets generated under high pressure—these jets are directed onto the web by a spunlace machine. As the water jets pass through the web, they rebound off the supporting mesh and re‑penetrate the web. Under the hydraulic action of these high‑velocity, multidirectional water jets, the fibers within the web undergo displacement, interlocking, entanglement, and cohesion, thereby achieving web consolidation.

