-
公开(公告)号：US20210238804A1
公开(公告)日：2021-08-05
申请号：US17236483
申请日：2021-04-21
Applicant: Essity Hygiene and Health Aktiebolag
Inventor： Arie Venema , Gaatze Wijbenga , Hannu Ahoniemi , Mikael Strandqvist
Abstract: 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.
-
Patent Agency Ranking
公开(公告)号：US20190226133A1
公开(公告)日：2019-07-25
申请号：US16326827
申请日：2016-09-01
Applicant: Essity Hygiene and Health Aktiebolag
Inventor： Arie Venema , Gaatze Wijbenga , Hannu Ahoniemi , Mikael Strandqvist
IPC: D04H5/03 , D04H18/04 , B08B1/00 , D04H5/08 , B32B5/02 , B32B5/26 , D21H25/00 , D21H13/10 , D21F11/04
Abstract: 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 0.0005-0.05 m3 of water per m3 of 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.
-
公开(公告)号：US20190177915A1
公开(公告)日：2019-06-13
申请号：US16326823
申请日：2016-09-01
Applicant: Essity Hygiene and Health Aktiebolag
Inventor： Arie Venema , Gaatze Wijbenga , Hannu Ahoniemi , Mikael Strandqvist
Abstract: A process and an apparatus for producing nonwoven materials are disclosed. The process comprises 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, 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.
-
公开(公告)号：US11807986B2
公开(公告)日：2023-11-07
申请号：US17236483
申请日：2021-04-21
Applicant: Essity Hygiene and Health Aktiebolag
Inventor： Arie Venema , Gaatze Wijbenga , Hannu Ahoniemi , Mikael Strandqvist
Abstract: 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.-
公开(公告)号：US11136700B2
公开(公告)日：2021-10-05
申请号：US16326827
申请日：2016-09-01
Applicant: Essity Hygiene and Health Aktiebolag
Inventor： Arie Venema , Gaatze Wijbenga , Hannu Ahoniemi , Mikael Strandqvist
IPC: D04H5/03 , D04H18/04 , D04H3/11 , B08B1/00 , B32B5/02 , B32B5/26 , D04H5/08 , D21F11/04 , D21H13/10 , D21H25/00
Abstract: A process for producing nonwoven materials is provided. The process includes: providing a three-phase (gas-liquid-solid) suspension, providing a first moving carrier sieve, applying the three-phase suspension onto the first moving carrier sieve to produce a fibrous web, removing aqueous residue of the three-phase suspension through the first carrier sieve, recycling the aqueous residue, pre-integrating the fibrous web by flushing the web with water and collecting flushed water, transferring the pre-integrated fibrous web from the first moving carrier sieve to a second moving carrier sieve, and hydroentangling the fibrous web. The three-phase suspension contains natural and/or manmade fibres, a surfactant, and air.
-
公开(公告)号：US11015292B2
公开(公告)日：2021-05-25
申请号：US16326823
申请日：2016-09-01
Applicant: Essity Hygiene and Health Aktiebolag
Inventor： Arie Venema , Gaatze Wijbenga , Hannu Ahoniemi , Mikael Strandqvist
Abstract: A process and an apparatus for producing nonwoven materials are disclosed. The process comprises 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, 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.
-
-
-
-
-
Search Results
6
records
(took 0.016 seconds)
