Photo: Collected
In the wet-laid process, short-cut fibers of up to 12 mm fiber length are suspended in water, using large tanks. Afterwards, the water-fiber or the water-pulp dispersion is pumped and continuously deposited on an inclined forming wire. The water is sucked off, filtered, and recycled. In addition to synthetic fibers, glass, ceramic, and carbon fibers can also be processed.
The wet-laid process allows the formation of highly uniform webs, high precision in weight and thickness, and defined pore size and high porosity.
What makes Freudenberg wet-laid materials unique?
Freudenberg offers unique wet-laid production capabilities. Our technology can achieve the manufacture of nonwovens weighing from 8 to 250g/m² with a wide range of fibers such as polyester, glass, polyolefin, polyamide, viscose, pulp, and polyvinyl alcohol. Fully synthetic fiber wet-laid nonwovens are possible, as is the use of ultra-fine microfibers. Our wet-laid manufacturing line combines various thermal and chemical bonding technologies, enabling a wide range of thicknesses and capabilities as well as very uniform distribution and porosity.
What applications are Freudenberg wet-laid nonwovens designed for?
Thanks to the high versatility of its production line and product range, Freudenberg can meet the needs of key wet-laid markets: filtration, building construction, food and beverage, energy, and packaging.
Innovative and well-established wet-laid product solutions
One of the most well-known products based on Freudenberg wet-laid technology is SoundTex acoustic solutions which address the needs of architects in the building construction sector. Glass fiber surfacing veils are well-established in the composite industry.
The most recent wet-laid innovations by Freudenberg include biodegradable nonwovens, packaging, filtration solutions for water treatment, food and beverage filtration, separators, and pasting paper for batteries. Last but not least, our technology supports e-mobility with products such as heat shield materials for electric vehicles.
Source: Online/NAN
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