WEB CONSISTING OF A BASE WEB AND AIR-LAID FIBRES HYDROENTANGLED ON THE BASE WEB

Abstract: Web consisting of a base web and air-laid fibres hydroentangled on the base webABSTRACTA web is comprising a base web consisting of synthetic fibres, air-laid cellulose fibres or synthetic fibres or cellulose fibres mixed with synthetic fibres air-laid in form of fluff on the base web, and a structure obtained by hydroentangling the fluff on the base web. The weight of the web is between 80 - and 2000 g/m2. The heavy-duty webs of the invention can advantageously be used for producing e.g. corrugated board and heat - and/or sound insulating materials.

Description: Web consisting of a base web and air-laid fibres hydroentangled on the base web The invention relates to a web comprising a base web consisting at least mainly of synthetic fibres, air-laid cellulose fibres or synthetic fibres or cellulose fibres mixed with synthetic fibres air-laid in form of fluff on the base web, and a structure obtained by hydroen angling the fluff on the base web. During the hydroentangling process jets of water are, under the influence of a pressure as high as e.g. 100 bar, ejected through a number of nozzles towards the fibre fluff on the base web. The base web has to be strong enough to withstand the heavy load from the water jets and is therefore normally produced of synthetic fibres. In some cases the base web can be a spunbonded/meltblown (SM S) web, but usually it is formed of carded fibres which are hydroentangled and dried before being used as base for the air-laid fibre fluff during the hydroentangling of this. Conventionally such webs have a weight of between 20 and 80 g/m 2 and are to a great extend used for manufacturing disposable non-woven products as e.g. feminine hygiene articles, incontinence articles, diapers, napkins, wipes and towels . The webs according to the invention are, however, heavy-duty webs having a weight of between 80 and 2000 g/m 2 , whereby the webs, in addition to the base web and the hydroentangled fluff on this, can be laminated with different kinds of layers. As an example of such other layers can be mentioned a hot- melted layer of a plastic on at least one side of the hydroentangled web, and at least one non-woven web on the melted plastic. In another example the other layers comprise at least one layer of melt blown fibres (SMMS) or bicomponent fibres and/or a combination of these on at least one side of the web. In a third example the other layers comprise at least one carded web on at least one side of the web. In a forth example the other layers comprise at least one carded web on at least one side of the web, and a film of e.g. a plastic on at least one side of the web. Heavy duty webs of the kind named above are usually calendered and can advantageously be used for producing e.g. corrugated board and heat - and/or sound insulating materials .

Claims: Claims 1. A web comprising, a base web consisting at least mainly of synthetic fibres, air-laid cellulose fibres or synthetic fibres or cellulose fibres mixed with synthetic fibres air-laid in form of fluff on the base web, and a structure obtained by hydroentangling the fluff on the base web, whereby the weight of the web is between 80 - and 2000 g/m 2 . 2. A web according to claim 1, where the fluff air-laid on the base web consists of cellulose fibres mixed with synthetic fibres, characterized in that the synthetic fibres by heat treatment are bonded to the cellulose fibres and to each other . 3. A web according to claim 1, characterized in that the web has a structure obtained by ejecting steam on the web for binding dust on this. 4. A web according to claim 1 comprising, a hot-melted layer of a plastic on at least one side of the web, and at least one non-woven web on at least one side of the web. 5. A web according to claim 1 comprising at least one layer of melt blown fibres (SMMS) or bicomponent fibres and/or a combination of these on at least one side of the web. 6. A web according to claim 1 comprising at least one carded web on at least one side of the web. 7. A web according to claim 1 comprising, at least one carded web on at least one side of the web, and a film of e.g. a plastic on at least one side of the web. 8. A web according to claim 1 comprising a binder on at least one side of the web. 9. A web according to claims 1, characterized in that the web is calendered.

Inventors: ANDERSEN JENS OLE BROECHNER, ANDERSEN, JENS, OLE, BROECHNER
Applicants: ANDERSEN JENS OLE BROECHNER, M & J FIBRETECH AS, ANDERSEN, JENS, OLE, BROECHNER, M & J FIBRETECH A/S
Application year: 2001
Main classification: D04H1
IPC codes: B32B5, B32B27, D04H1, D04H13