Lenzing AG Nonwoven Innovation

Abstract

In contrast to textile applications where cotton is the mostcommonly used cellulosic fibre, viscose and lyocell are the dominating fibre materialsfor absorbent nonwoven products. The particular advantages of man-made cellulosicsare their exceptional purity, superior absorbency compared to cotton or pulp,and their softness and opacity. Depending on product and end-use therequirements regarding the sorption properties of the material are quite different:a dry wipe e.g. shall absorb a fluid rapidly and retain it, a wet wipe shallhold a lotion temporarily and release it on demand whereas a tampon shallexpand immediately after wetting and retain a maximum amount of fluid evenunder pressure.

Viscose and lyocell fibres can be modified in their physical properties by various means in order to fulfil these different requirements.This paper gives an overview of various physical and chemical methods to designman-made cellulosic fibres with tailor-made sorption properties, it reviewsuseful test methods for characterisation of the sorption properties of fibres,nonwovens and tampons and assesses the performance of various fibres inabsorbent nonwovens.

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