Process for producing nonwoven

There is a need for a process of producing hydroentangled nonwoven materials used for wiping products which avoids the drawbacks of irregular or defective surface characteristics and excessive use of surfactants. A process for producing nonwoven materials is disclosed. The process of comprises the following steps: a) providing a three-phase (gas-liquid-solid) suspension containing: - the natural and/or manmade fibres; - a surfactant; - 20-48 vol.% of air， b) providing a first moving carrier sieve， c) applying the three-phase suspension onto the first moving carrier sieve to produce a fibrous web， d) removing aqueous residue of the three-phase suspension through the first carrier sieve， e) recycling the aqueous residue to step a)， f) pre-integrating the fibrous web by flushing the web with 0.0005-0.05m3of water per m3of applied three-phase suspension， at a pressure of 5-50 bar， and collecting flushed water， g) transferring the pre-integrated fibrous web from said first moving carrier sieve to a second moving carrier sieve， said second moving carrier sieve having a porosity which is smaller than the porosity of said first moving carrier sieve， h) hydroentangling the fibrous web on said second moving carrier. The process and resulting product provide a hydroentangled， absorbent nonwoven material having a desired strength， and limited levels of surfactants.