Process and apparatus for wetlaying nonwovens

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United States of America Patent

PATENT NO 11807986
APP PUB NO 20210238804A1
SERIAL NO

17236483

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Abstract

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A process and an apparatus for producing nonwoven materials are disclosed. The process includes the following steps:

    a) providing a three-phase (gas-liquid-solid) suspension containing air, water, fibrous material and a surfactant,b) depositing the suspension onto a moving carrier sieve to produce a fibrous web on the carrier sieve,c) removing aqueous residue of the suspension through the carrier sieve,d) conveying the aqueous residue through one or more phase separation tanks in an essentially horizontal direction while providing a depressurised headspace above the aqueous residue,e) recycling the aqueous residue conveyed in step d) to step a),f) preferably pre-integrating the fibrous web.

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Patent Owner(s)

  • ESSITY HYGIENE AND HEALTH AKTIEBOLAG

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ahoniemi, Hannu Gothenburg, SE 19 320
Strandqvist, Mikael Gothenburg, SE 33 565
Venema, Arie Suameer, NL 4 44
Wijbenga, Gaatze Noardburgum, NL 4 44

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