What is Air-laid Paper
Air-laid paper is a textile-like material categorized as a nonwoven fabric made from fluff pulp.
Compared with normal wet-laid paper and tissue, air-laid paper is very bulky, porous and soft. It has good water absorption properties and is much stronger compared with normal tissue. Main characteristics are:Soft, does not scratch. Non-linting, no dust, no static. Strong, even when wet, can be rinsed and reused. Clean, hygienic, can be sterilized. Textile-like surface and drape. Can be dyed, printed, embossed, coated and made solvent resistant.
Unlike the normal papermaking process, air-laid paper does not use water as the carrying medium for the fibre. Fibres are carried and formed to the structure of paper by air. The air-laid structure is isotropic.
The raw material is long fibered softwood fluff pulp in roll form. The pulp are defibrized in a hammermill. Defibration is the process of freeing the fibres from each other before entering the papermachine. Important parameters for dry defibration are shredding energy and knot content. Normally an air-laid paper consists of about 85% fibre. A binder must be applied as a spray or foam. Alternatively, additional fibres or powders can be added to the pulp which can then be activated and cured by heat.
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