EP0743995A1 - Verfahren und vorrichtung zur herstellung eines trockengelegten faserbahn - Google Patents
Verfahren und vorrichtung zur herstellung eines trockengelegten faserbahnInfo
- Publication number
- EP0743995A1 EP0743995A1 EP95904412A EP95904412A EP0743995A1 EP 0743995 A1 EP0743995 A1 EP 0743995A1 EP 95904412 A EP95904412 A EP 95904412A EP 95904412 A EP95904412 A EP 95904412A EP 0743995 A1 EP0743995 A1 EP 0743995A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- web
- fibres
- binder
- thermobonding
- bonding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/425—Cellulose series
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/60—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
- D04H1/68—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions the bonding agent being applied in the form of foam
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
Definitions
- the present invention relates to a method for manufacturing a dryformed fibrous web material based on dryformed cellulose fibres with a suitable bonding.
- the laying out of the fibres for forming a current web is usually effected by a pulp material being defibrated and admixed into an airflow, which brings the loose fibres to a distributor head above a moving, perforated forming wire, underneath which is placed a suction chamber for down suction of the fibres against the wire, where they are currently deposited as a coherent fibrous pulp web with a desired web thickness.
- the products are typically used as liquid absorbing sheets.
- Gluing On a carrier wire the pulp web is passed through a glueing station, in which, by means of a number of nozzles, a suitable glue, normally of the latex-type, is sprayed on the web, whereafter the wire is lead through a tunnel oven for drying out of the glue. Thereafter the web is transferred to an overhead wire, against which it is fixed by suction from above, so that the underside of the web is exposed, and the web is then lead through or over another glueing station, where glue is correspondingly sprayed against this underside of the web. Thereafter the web is lead through yet a tunnel oven for drying out and final setting of the glue, whereafter the web is self-supporting and can be wound up for storage or delivery.
- a suitable glue normally of the latex-type
- sheet webs of rather high quality is manufacturable, but as to machinery, the method is exacting and vulnerable to irregularities in the glueing stations. It is furthermore a limitation that the method is not suitable for thick sheet webs, as it is difficult to achieve a high penetration depth of the glue, whereby a relatively thick layer tends to segregate in the centre plane, where the bonding is weak or completely lacks.
- the products will typically contain about 85% cellulose fibres and about 15% binding agent. Typical weights of products can be 50-120 g/m 2 , as heavier products easily delaminate. Furthermore the products are bad suited for containing superabsorbers.
- binding fibres By this method a homogeneous admixture of heat actuated binding fibres, also named thermobonding fibres, into the cellulose fibres is produced, whereby the dryformed web material may be fixed solely by being lead through a heating zone. As to system and control, this is a more simple method, by which also thick webs are manufacturable, as the bonding fibres will be evenly present in the outer as well as the inner planes of the material.
- the weight of product may typically be of 40-800 g/m 2 , and a considerable admixing of superabsorbing agents or other additives is usable. The quality achievable is fully acceptable for many different applications, however, certain
- thermobonding fibres have to be limited typically to about 15 percent.
- the cellulose fibres range in lengths between 0,5 and approximately 5 mm, whereas heat thermobonding fibres are often 6 mm or longer. In practice this gives a very good bonding of the longest cellulose fibres, whereas the very short cellulose fibres are bonded incompletely.
- the material can dust with short fibres, which is generally a profound disadvantage, and the products are therefore used mainly as insert materials in outer wrappings. Thus the dust nuisances may be eliminated outwardly, but in return they occur large-scale inside the plants, where the products are handled as insert material.
- thermobonding binding fibres As mentioned, by the glueing method a bonding result is achieved, which will be best at the web surface and poorer at the centre layer of the web, but if, by a combined application of the thermobonding binding fibres it is only a question of sealing against dusting from the web, this will be achievable by coating the web with very thin surface layers of glue.
- a surface glue will be applicable simultaneously on both sides of the already selfsupporting web, and both of the applied glue layers, which, both of them, can be
- thermobonding fibres whereas the web surfaces are sealed in more or less degree by adding glue in modest amounts, without ambition of any deep penetration of the glue into the material. It is then not decisive how the glue is applied, but to the invention, however, it is an important sub aspect to indicate how the glue can be applied in a new and very economical way for achieving the desired result.
- the glue is applied in a foamed condition, whereby it may cover the surfaces with a minimum of dry matter therein.
- a good effect is achievable by admixing only 1-2 g of binder per m 2 per side, using a waterdispersed foamed binder with only approximately 2 g dry pulp pr. liter foam.
- the foam may be generated in a conventional foaming unit, and in the foamed volumen the glue may then be present in an amount of only some 0,2 volumen percent.
- the application of the foam may be effected in any suitable way, for instance by vertical, sloping or horizontal feed of the web through mating rollers, with controlled foam supply to the roller gap on both sides of the web.
- a rolling process of the web gives an attractive result in that the surface fibres will be bonded in couched positions, whereby the surface gets a more smooth and firm character.
- prefoamed binder If the penetration depth is too little, the thin bonding layer in the surface will soon be abraised, and if the depth is too large, this will partly imply an unnecessary large consumption of binder and partly give the product a plastics-like character, with sluggish water absorption.
- the glue can dry out and be hardened at a low energy consumption, but it can, however, take place at such a high temperature that the bonding fibres can be reactivated, and as explained further below, this can give the most extraordinary result that the tensile strength of the web can be increased to nearly the double.
- the invention gives significant results as regards planning of manufacturing of products with desired qualifications, without said qualifications being altered by a successive extrusion of the short fibres from the products. As this fibre amount may be of a noticeable size, the associated result will be that it is possible to dispose in a far better way for achieving the desired qualifications of the finished product.
- the invention is in a preferred embodiment shown schematically in the drawing.
- a forming wire 2 is shown having a conveying stretch 4 below a pair of distributor heads 6 for supplying a mixture of loose cellulose fibres and heat thermobonding fibres to the stretch 4, on which is thus formed a loose web 8.
- the latter is compressed between rollers 10 and then transferred to a transport wire 12 via an overhead transfer station 14.
- the wire 12 brings the web through a heating zone 16, in which the thermobonding fibres are activated for bonding of the cellulose fibres, normally at a temperature of 130-140 °C.
- the now stabilised and self-supporting web is taken through mating rollers 18.
- the web, now as a product web is hereafter taken to upwinding in rolls 34 of finished products.
- a station 20 is aftercoupled, in which the web 22, at both sides, is provided with a binder foam, preferably by the web being led down around a diversion roller 24 down to a so-called
- foulard-unit consisting of a pair of rollers 26 placed with adjustable spacing and with non-illustrated, upper means for adding impregnating compound 28 to the upper roller gap at both sides of the lead down web 22.
- the supply of impregnating compound partly by adjusting the mating gap and partly by regulating the flow of the compound to a higher or lower level above the roller gab, for instance within a regulating range of 2-20 cm.
- the supply may in this case be adjusted by the contents of dry matter in the bonding agent (as an example within 5-15%) and by adjusting the foam density, for instance within the interval 20-100 g/1.
- the hardness/softness of the product may be controlled by choise of a binder agent with a hard or soft film, respectively, whereas the hydrophile/hydrophobe qualities of the product may be controlled by means of suitable prefoaming agents or additives.
- the web 22 is taken onto a belt 30 through a heating tunnel 32, in which the web, preferably by means of added hot air, is heated to a quick evaporation of the aquaous part of the foam 28, whereafter the web is reeled up in the usual delivery roll 34.
- the carrier wire 2 which is normally a woven grid wire made of intersecting threads, which, by way of the associated intersections will form local, upwardly protruding and depressed parts, respectively.
- the carrier wire 2 is normally a woven grid wire made of intersecting threads, which, by way of the associated intersections will form local, upwardly protruding and depressed parts, respectively.
- the fibres in the web will be extra compressed when passing the rollers 10, so that the fibres as hereby locally depressed will be extra sensitive to the welding-effect occurring in the heating zone 16.
- this condition is weakened in that the web, while passing the transfer unit 14 is loosened somewhat, influenced by the weak tractive force and web movement, which is necessary for taking off the web from the forming wire and transferring it to the transfer wire, just as a corresponding loosening will occur at the transfer from the transfer wire to the oven wire.
- the compressed web has a certain expansion power, and thus the originally well depressed fibres will not be all to well depressed when passing the hardening tunnel 16.
- the glue treatment of the web will be some kind of catalyzer for the achievement of a following significantly increased tensile strength of the web material.
- the immediate result of the invention viz. the bonding or the sealing of the 'dust fibres' under maintenance of a non-sealed surface is advantageous also in another way, as a retained amount of said fibres just within the fixed surface layers has a significant fluid spreading effect, which is of great importance in absorbing products.
- the liquid supply during use will only appear at a sub area of the product, and for a desired absorbing capacity a superabsorbent has to be dosed in consideration of this. If the product can appear with a good distribution ability, the dosing of the superabsorbent can be minimized.
- the aqueous foam can be added on both sides of a product having a centre layer of a superabsorbent material without said material having to become activated with water.
- the product may have a fibre bottom layer of 70 g/m 2 , an intermediate layer of superabsorbent of 30 g/m 2 and a fibre top layer of 30 g/m 2 .
- the invention is advantageous also as far as filter materials are concerned, where both the significantly reduced dusting and the sustained content of short fibres is of a positive effect.
- the bonding foam as carrier for colouring pigments, these being added before the foaming, whereby a certain dyeing of the products can be produced in a most simple way.
- the binder is normally used in very modest amounts, only dyeing in pastel colours is achievable, unless the process is specifically adapted with respect to a more powerful dyeing.
- foam application techniques could be used, e.g. the so-called screen coating.
- An air laid product 60 g/m 2 , consisting of 85% wooden cellulose fibres with largest possible content of long fibres and 15% thermobonding fibres, is foam coated in a foulard, the roller gap of which is adjusted to 0,6 mm.
- the prefoamed binding agent is produced in the following way:
- the binding agent is foamed to a density of 20 g/l.
- the foam level in the foulard is about 4 cm, approximately 1,5 g binder (100% drystuff) each m 2 at each side of the product is added. After the foam coating, the product is dryed in a normal way, for instance at 140 C°.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Paper (AREA)
- Laminated Bodies (AREA)
- Nonwoven Fabrics (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK27/94 | 1994-01-07 | ||
DK002794A DK2794A (da) | 1994-01-07 | 1994-01-07 | Fremgangsmåde og anlæg til fremstilling af en bane af et tørformet fiberflor |
DK2794 | 1994-01-07 | ||
PCT/DK1995/000011 WO1995018886A1 (en) | 1994-01-07 | 1995-01-06 | Method and system for manufacturing a dry-formed fibrous web |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0743995A1 true EP0743995A1 (de) | 1996-11-27 |
EP0743995B1 EP0743995B1 (de) | 1998-07-29 |
Family
ID=8088920
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95904412A Expired - Lifetime EP0743995B1 (de) | 1994-01-07 | 1995-01-06 | Verfahren und vorrichtung zur herstellung einer trockengelegten faserbahn |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0743995B1 (de) |
JP (1) | JP3802926B2 (de) |
AT (1) | ATE169074T1 (de) |
AU (1) | AU705139B2 (de) |
CA (1) | CA2180534C (de) |
DE (1) | DE69503758T2 (de) |
DK (2) | DK2794A (de) |
ES (1) | ES2120717T3 (de) |
FI (1) | FI111867B (de) |
WO (1) | WO1995018886A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10493718B2 (en) | 2013-04-10 | 2019-12-03 | Airlaid A/S | Absorbing airlaid product |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7037394B2 (en) * | 1994-01-07 | 2006-05-02 | Scan-Web I/S | Method and apparatus for manufacturing a dryformed fibrous web |
JP4060885B2 (ja) * | 1996-02-12 | 2008-03-12 | スキャン―ウェブ・アイ/エス | 吸収シートまたはウェブ材料および乾式形成によってこの材料を製造する方法 |
US6689242B2 (en) * | 2001-03-26 | 2004-02-10 | First Quality Nonwovens, Inc. | Acquisition/distribution layer and method of making same |
US6709613B2 (en) | 2001-12-21 | 2004-03-23 | Kimberly-Clark Worldwide, Inc. | Particulate addition method and apparatus |
JP6361209B2 (ja) * | 2014-03-25 | 2018-07-25 | セイコーエプソン株式会社 | シート製造装置、シート製造方法及びシート |
KR102644213B1 (ko) * | 2023-12-22 | 2024-03-07 | (주)왕보 | 소취 기능을 갖는 부직포, 소취 기능을 갖는 부직포의 제조 방법 및 제조 장치 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4292271A (en) * | 1979-12-28 | 1981-09-29 | American Can Company | Methods of applying bonding materials onto fibrous webs |
US4385954A (en) * | 1980-12-19 | 1983-05-31 | James River-Dixie/Northern, Inc. | Method for applying binding agents to fibrous webs |
DE3664941D1 (en) * | 1985-04-22 | 1989-09-14 | Grain Processing Corp | Non-laminated dry formed absorbent product |
-
1994
- 1994-01-07 DK DK002794A patent/DK2794A/da not_active IP Right Cessation
-
1995
- 1995-01-06 DK DK95904412T patent/DK0743995T3/da active
- 1995-01-06 ES ES95904412T patent/ES2120717T3/es not_active Expired - Lifetime
- 1995-01-06 CA CA002180534A patent/CA2180534C/en not_active Expired - Lifetime
- 1995-01-06 AU AU13113/95A patent/AU705139B2/en not_active Expired
- 1995-01-06 EP EP95904412A patent/EP0743995B1/de not_active Expired - Lifetime
- 1995-01-06 DE DE69503758T patent/DE69503758T2/de not_active Expired - Lifetime
- 1995-01-06 WO PCT/DK1995/000011 patent/WO1995018886A1/en active IP Right Grant
- 1995-01-06 JP JP51828195A patent/JP3802926B2/ja not_active Expired - Lifetime
- 1995-01-06 AT AT95904412T patent/ATE169074T1/de active
-
1996
- 1996-07-05 FI FI962761A patent/FI111867B/fi not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9518886A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10493718B2 (en) | 2013-04-10 | 2019-12-03 | Airlaid A/S | Absorbing airlaid product |
Also Published As
Publication number | Publication date |
---|---|
ATE169074T1 (de) | 1998-08-15 |
JPH09510753A (ja) | 1997-10-28 |
CA2180534A1 (en) | 1995-07-13 |
DK2794A (da) | 1995-03-13 |
DE69503758D1 (de) | 1998-09-03 |
AU705139B2 (en) | 1999-05-13 |
FI962761A (fi) | 1996-07-05 |
DK169843B1 (de) | 1995-03-13 |
FI111867B (fi) | 2003-09-30 |
CA2180534C (en) | 2000-03-14 |
ES2120717T3 (es) | 1998-11-01 |
AU1311395A (en) | 1995-08-01 |
JP3802926B2 (ja) | 2006-08-02 |
EP0743995B1 (de) | 1998-07-29 |
WO1995018886A1 (en) | 1995-07-13 |
DE69503758T2 (de) | 1999-04-29 |
DK0743995T3 (da) | 1999-05-03 |
FI962761A0 (fi) | 1996-07-05 |
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