[2] Kotex's first advertisement for products made with wood pulp (Cellucotton) appeared in 1921.
[3] Disposable diaper producers also were early to convert to fluff pulp because of its low cost and high absorbency.
The demand of the pulp in diapers has gone from being the absorbent of liquid to giving the products dry and wet strength.
The most common raw material source for fluff pulps are southern bleached softwood kraft (SBSK) from loblolly pine.
Important parameters for dry defibration are shredding energy and knot content.