Process and device for the formation of directly-formed cellulosic webs
US-11371173-B2 · Jun 28, 2022 · US
Method for recovering solvent and cellulose in the production of cellulosic spun-bonded nonwoven fabrics
US11939713B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11939713-B2 |
| Application number | US-201917299828-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 4, 2019 |
| Priority date | Dec 5, 2018 |
| Publication date | Mar 26, 2024 |
| Grant date | Mar 26, 2024 |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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Abstract
Official abstract text for this publication.
A plant ( 1 ) for the production of spunbonded nonwoven ( 8 ), comprising a spinning solution production ( 3 ), a spinning system ( 2 ), a device ( 6 ) for the delivery of coagulation liquid, at least one conveying device ( 7, 9 ) for depositing the spunbonded nonwoven ( 8 ), and a collecting device ( 13 ) for the spunbonded nonwoven ( 8 ), wherein at least one discharge device ( 14 ) is provided between the device ( 6 ) for the delivery of coagulation liquid and the collecting device ( 13 ) for the spunbonded nonwoven ( 8 ).
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of recycling solvent or cellulose in a plant for the production of a spunbonded nonwoven, comprising: extruding spinning dope filaments from a spinning system depositing and collecting the filaments, in a drawn state, to form a spunbonded nonwoven, wherein the spunbonded nonwoven deposited during a start-up of the plant, during a shutdown of the plant, or in case of operational problems of the plant is discharged prior to collection, wherein at least (a) the solvent is removed from the spunbonded nonwoven or (b) the spunbonded nonwoven is supplied to the spinning solution production. 2. The method according to claim 1 , wherein the spunbonded nonwoven is shredded before it is supplied to the spinning solution production. 3. The method according to claim 1 , wherein that the spunbonded nonwoven is mixed with solvent before it is supplied to the spinning solution production.
Assignees
Inventors
Classifications
- D04H3/033Primary
reorientation immediately after yarn or filament formation · CPC title
of solvents, plasticisers or unreacted monomers · CPC title
Wet spinning methods {(D01D5/0046 takes precedence)} · CPC title
Elements of machines in combination · CPC title
- D04H3/013Primary
Regenerated cellulose series · CPC title
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Frequently asked questions
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- What does patent US11939713B2 cover?
- A plant ( 1 ) for the production of spunbonded nonwoven ( 8 ), comprising a spinning solution production ( 3 ), a spinning system ( 2 ), a device ( 6 ) for the delivery of coagulation liquid, at least one conveying device ( 7, 9 ) for depositing the spunbonded nonwoven ( 8 ), and a collecting device ( 13 ) for the spunbonded nonwoven ( 8 ), wherein at least one discharge device ( 14 ) is provid…
- Who is the assignee on this patent?
- Chemiefaser Lenzing Ag
- What technology area does this patent fall under?
- Primary CPC classification D04H3/033. Mapped technology areas include Textiles & Paper.
- When was this patent published?
- Publication date Tue Mar 26 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).