This is how wetlaid nonwovens are made

In the wetlaid process, staple fibers of up to 12 mm fiber length, very often mixed with viscose or wood pulp, are suspended in water, using large tanks. Afterwards the water-fiber- or the water-pulp-dispersion is pumped and continuously deposited on a forming wire. The water is sucked off, filtered and recycled. Besides synthetic fibers, glas ceramic and carbon fibers can be processed.

To distinguish wetlaid nonwovens from wetlaid papers more than 30% by mass of its fibrous content is made up of fibers with a length to diameter ratio greater than 300, its density is less than 0.40 g/cm3.


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