EP1776496A1 - Formkopf und verfahren zum herstellen eines faservlieses - Google Patents
Formkopf und verfahren zum herstellen eines faservliesesInfo
- Publication number
- EP1776496A1 EP1776496A1 EP05747189A EP05747189A EP1776496A1 EP 1776496 A1 EP1776496 A1 EP 1776496A1 EP 05747189 A EP05747189 A EP 05747189A EP 05747189 A EP05747189 A EP 05747189A EP 1776496 A1 EP1776496 A1 EP 1776496A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fibers
- needle rollers
- fiber
- interior
- needle
- 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.)
- Withdrawn
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
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
-
- 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
- D04H1/42—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
- D04H1/4258—Regenerated 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
- D04H1/42—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
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin 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
- D04H1/42—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
- D04H1/4326—Condensation or reaction polymers
- D04H1/435—Polyesters
-
- 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
- D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
-
- 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
- D04H1/54—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 welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
-
- 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
- D04H1/54—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 welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H1/5418—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
-
- 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
- D04H1/54—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 welding together the fibres, e.g. by partially melting or dissolving
- D04H1/552—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 welding together the fibres, e.g. by partially melting or dissolving by applying solvents or auxiliary agents
-
- 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
-
- 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
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
-
- 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
- D04H18/00—Needling machines
- D04H18/02—Needling machines with needles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
Definitions
- the invention relates on the one hand to a molding head for a device for producing a nonwoven fabric and on the other hand to a method for preparing fibers for producing a nonwoven fabric.
- the molding head has at least one fiber feed that opens into a fiber processing space.
- the fiber processing room has a storage opening for the delivery of fibers, for example on a conventional, air-permeable conveyor belt, under which a so-called suction box is arranged.
- Several intermeshing needle rollers with longitudinal axes aligned parallel to one another are arranged in the fiber processing space. The needle rollers are rotatable about their longitudinal axis.
- the method comprises as process steps the feeding of fibers to a molding head and the uniform distribution of the fibers on a conveyor belt by means of the molding head.
- Various types of molding heads and processes of this type are already known, for example from WO 99/36623 or WO 03/016605.
- the nonwovens to be manufactured usually contain a mixture of natural fibers, e.g. Cellulose fibers made of cotton or loosened, already mechanically and / or chemically treated wood cellulose (fluff pulp), synthetic matrix fibers such as e.g. Polyester, polypropylene or viscose as well as synthetic binding fibers such as so-called bicomponent fibers and, for example, as absorbents so-called superabsorbent polymers in particle (SAP) or fiber form (SAF).
- Bicomponent fibers usually have a core that melts at higher temperatures (190-250 ° C), e.g.
- PE Polyethylene
- Such nonwovens are used, for example, as semi-finished products for the production of diapers and sanitary napkins, absorbent pads for the food industry or for insulation material.
- An important process step in the manufacture of such a nonwoven is to deposit the fiber mixture as evenly as possible on an air-permeable conveyor or conveyor belt. This is done with the help of a forming head in which the fibers are mixed.
- the storage is supported by a suction device (suction box) below the conveyor belt, with which the fibers are sucked through the air-permeable conveyor belt to the conveyor belt.
- suction box suction box
- the tangled, but evenly deposited fiber mixtures are transported on the conveyor belt as a fiber bed for further processing in downstream process steps, for example the action of heat on the fiber bed, so that the polyethylene sheaths of the bicomponent fibers fuse and stick together. Treatment with latex can also be used.
- the invention is therefore based on the object of specifying a device and a method which have a greater bandwidth with respect to the fibers to be processed and thus with respect to the products to be produced.
- this object is achieved by a molding head of the type mentioned at the beginning, in which the intermeshing needle rollers enclose an interior and are arranged with respect to the fiber feed and the deposit opening in such a way that fibers fed to the molding head during operation enter the interior between intermeshing needle rollers and also leave the interior between interlocking needle rollers.
- the shaping head is therefore designed in such a way that the fibers to be processed have to pass at least twice, preferably several times, between intermeshing needle rollers on the way from the respective fiber feed to the deposit opening.
- the intermeshing needle rollers help to even out the fiber distribution in two ways. On the one hand, they simply result in an even distribution of already separated fibers.
- the interlocking needle rollers dissolve lumps of fibers consisting of interlocked fibers and in this way bring about further fiber separation.
- the latter can also be referred to as fiber opening.
- the molding head according to the invention has a larger fiber opening capacity than known molding heads.
- Another advantage is that with the molding head according to the invention, both long natural, eg Cotton cellulose fibers as well as short natural ones, for example wood cellulose fibers or synthetic fibers, can be processed equally and in one step, in particular fibers with lengths between 2 and 60 mm. Fiber beds between, for example, 50 g / m 2 and 2500 g / m 2 can also be produced in one step with the molding head according to the invention.
- long-fiber fiber beds from 10 g / m 2 to 80 g / m 2 can be produced in one step with conventional molding heads using the carding process and short-fiber fiber beds from 50 g / m 2 to 2000 g / m 2 with the conventional air laying process.
- the longitudinal axes of the needle rollers are connected to a rotatingly driven needle roller carrier, the axis of rotation of which runs parallel to the longitudinal axes of the needle rollers.
- the needle rollers are preferably each at the same distance from the axis of rotation of the needle roller carrier, and are thus arranged on an imaginary cylinder wall which belongs to a cylinder whose central axis is the axis of rotation of the needle roller carrier.
- the needle rollers are evenly distributed on this imaginary cylinder wall, so that they are at the same distance from each other. The fibers entering and exiting the interior thus pass between rotating and translationally moving needle rollers.
- the rotational movement of the needle rollers is preferably such that adjacent needle rollers have an opposite direction of rotation, as is also the case for intermeshing gear wheels of a transmission.
- the interlocking needle rollers are not rigid, for example coupled to one another via gearwheels, but each have a separate drive and can therefore also be driven, for example, at different rotational speeds.
- the needles of adjacent needle rollers with respect to the needle roller longitudinal Axial direction offset so that the needles of adjacent needle rollers do not collide regardless of the respective speeds.
- the needles are preferably arranged in longitudinal rows on the needle rollers, particularly preferably alternately offset a little in the circumferential direction of the needle roller, so that there is a zigzag needle row in each case.
- the needles of the individual needle rollers each protrude from a cylindrical needle roller body to which the individual needles are attached.
- the number of needle rollers enclosing a respective interior space is arbitrary and at least 4.
- An arrangement of 8 or 12 needle rollers has the advantage, however, that the transport direction in the space between the needle rollers, which is predetermined by the rotational movement of adjacent needle rollers with different directions of rotation, is such that the direction of transport in opposite gaps is opposite, that is, either towards one another (into the interior) or away from one another (out of the interior).
- the needle roller carrier preferably has a central shaft which is aligned concentrically to the axis of rotation of the needle roller carrier and thus on the one hand fills at least part of the interior and on the other hand also serves to transmit rotational forces along the shaft.
- the fiber processing space of the molding head preferably has side and end walls in the area of the needle rollers, which enclose the needle rollers enclosing the interior in such a way that fibers flowing outside the needle rollers past the interior are largely prevented.
- the side walls running parallel to the axis of rotation and the longitudinal direction of the needle rollers above the interior are preferably bent towards one another in such a way that a fiber inlet opening narrows relative to the outer diameter of the entirety of the needle rollers enclosing the interior.
- This fiber inlet opening is preferably dimensioned such that it corresponds to approximately 1.5 to 2.5 times the free space that exists between roller bodies of adjacent needle rollers. Such a fiber inlet opening helps to even out a fiber flow and also an air flow through the interior.
- the fiber inlet opening is preferably arranged centrally above the interior, so that the fibers are fed as centrally as possible to the rotating, intermeshing and translationally moved needle rollers.
- a screen is preferably arranged underneath the interior and assigned to the deposit opening. This screen preferably runs along an imaginary cylinder wall segment, which corresponds to an imaginary cylinder, the central axis of which is the axis of rotation of the needle roller carrier.
- the sieve is preferably formed by sieve bars which run at least approximately parallel to one another and to the longitudinal axes of the needle rollers and which preferably have a round cross section.
- the cross section of the sieve bars is preferably selected so that its diameter corresponds to approximately half the fiber length of the longest fibers to be processed.
- the distance between the sieve bars also preferably corresponds to half the fiber length of the longest fibers to be processed.
- Such a sieve acts in the aerodynamic sense as a diffuser and thus helps to even out the air flow below the interior. This creates a uniform air flow for a fiber bed placed on the conveyor belt between the fiber feed for the fibers to be processed and the suction box below the conveyor belt.
- the sieve When using shorter fibers with a length of up to 10 mm, the sieve is formed from well-known wire mesh or steel plates with regular, repeating, geometric openings. Opening shapes can be round, stadium-shaped (oval) or rectangular. Their number, size and arrangement depend on the desired degree of opening, the ratio between the passage area and the total area of the sieve.
- the above-mentioned object is also achieved by a method of the type mentioned in the introduction, in which not only a distribution of already separated fibers in the molding head, but also an opening of fiber lumps and thus a separation of fibers takes place with the help of rotating, interlocking needle rollers.
- the fibers are guided between rotating and intermeshing needle rollers into an interior and then leave this interior between rotating, intermeshing needle rollers.
- the needle rollers are preferably moved transversely to the axis of rotation of the needle rollers while the fibers are being fed to the interior.
- the movement of the needle rollers is preferably set such that the fibers or at least some of the fibers are fed into the interior several times before the fibers leave a fiber processing space in which the interior is located.
- an air stream is preferably generated which passes through the interior from top to bottom. This air flow is preferably evened out through a sieve below the interior. In addition, the air flow is preferably passed above the interior through a fiber inlet opening narrowed relative to the interior. This also helps to even out the air flow.
- Figure 1 a section of a system for producing a nonwoven fabric with a molding head according to the invention.
- FIG. 2 a top view of the molding head from FIG. 1.
- the system 10 shown in FIG. 1 for producing a nonwoven fabric comprises a molding head 12 which is arranged above a conveyor belt 14.
- the conveyor belt 14 is permeable to air.
- the molding head 12 has a lower storage opening 16 above the conveyor belt 14.
- a suction box 18 is arranged below the conveyor belt 14 and below the storage opening 16. With the aid of the suction box 18, a directed air flow can be generated through the molding head 12 out of its storage opening 16, through the conveyor belt 14 and into the suction box 18.
- Fibers deposited by the molding head 12 on the conveyor belt 14 can be safely sucked onto the conveyor belt 14.
- Fibers deposited by the forming head 12 on the conveyor belt 14 form a fiber bed (not shown) on the conveyor belt 14.
- a continuous fiber bed can be produced on the conveyor belt 14 if fibers from the forming head 12 are simultaneously deposited on the conveyor belt 14. This continuously produced fiber bed is fed to further processing stages, not shown in FIG. 1, for example those in which the fiber bed is subsequently pressed.
- connection techniques are conceivable; they depend on the required properties of the product, such as a low adhesive content or high tear resistance, even when wet.
- "application of high pressures at selected points, hydrogen bonding also ultrasound bonding, bonding by heating, e.g. with hot air and the use of latex dispersions.
- the fibers forming a respective fiber bed are usually natural, for example cellulose fibers mixed with synthetic fibers, for example so-called bicomponent fibers.
- the latter preferably have a core made of PET or PP and are surrounded by a jacket made of PE. When heated, the PE jacket melts and causes a respective bicomponent fiber to combine with a natural or synthetic neighboring fiber or functional components.
- Such functional components of the fiber bed that are fed to the forming head 12 can be, for example, superabsorbent polymers (SAP), which lead to the fact that liquids can be bound efficiently by means of a fiber fleece produced in this way. This property is particularly desirable when if the nonwoven is to be processed into absorbent articles such as diapers, sanitary napkins or absorbent pads.
- SAP superabsorbent polymers
- the shaping head 12 encloses a fiber processing space 20 into which one or more fiber feeds 22 open - only one such fiber feed 22 is shown in FIG.
- fibers of different types for example cellulose fibers or bicomponent fibers, as well as other substances to be fed to the fiber bed, such as SAP or odor-absorbing constituents, can be fed in independently of one another.
- the fiber feed 22 ensures a uniform feed of pre-opened fibers over the entire width of the fiber processing space 20, see FIG. 2.
- a volumetric metering unit is provided as the fiber feed, which is arranged centrally above the fiber processing space 20, that is to say not laterally, as shown in the figures.
- the fiber is thus fed into the fiber processing space from above.
- a needle roller carrier 26 which is shown in FIG. 1 only by its central drive shaft 24 and which carries eight needle rollers 28 evenly distributed on an imaginary cylinder jacket surface, is arranged in the fiber processing space 20.
- the cylindrical outer surface of the needle roller carrier 26 is indicated by the dash-dotted line labeled 26.
- the needle roller carrier 26 can be seen better in FIG.
- Each of the needle rollers 28 has a needle roller body 30 with attached needles 32 arranged in rows in the longitudinal direction of the needle roller body 30.
- the needles have a diameter between 1 and 6 mm and preferably between 2 and 4 mm.
- the distance between the needles 32 within a row is between 10 and 20 mm and is typically on the order of 15 mm.
- the needle rollers 28 engage, as shown in Figure 1, and enclose an interior 34th
- the needle roller carrier 26 can be rotated about its central shaft 24 in such a way that all of the needle rollers 28 can be moved in a circle on the path indicated by dash-dotted lines.
- the needle roller carrier 26 has a central electric drive motor 36.
- Each needle roller 28 is driven by its own electric motor 38, so that the needle rollers 28 can rotate independently of one another.
- the needles 32 of adjacent needle rollers are offset from one another in the longitudinal direction of the needle rollers, so that the needles 32 of adjacent needle rollers do not collide with one another when the needle rollers 28 rotate independently of one another.
- Fibers fed to the fiber processing space 20 above the interior 34 by means of the fiber feed 22 must therefore pass through the spaces 40 between adjacent needle rollers 28 at least twice before the fibers leave the fiber processing space 20 in the area of the deposit opening 16.
- the fibers pass through the interior 34.
- both the needle roller carrier 26 and the needle rollers 28 are driven in rotation, so that each needle roller 28 simultaneously rotates. tion and a translational movement along the dash-dotted line.
- Adjacent needle rollers 28 are driven in opposite directions of rotation, so that they behave at the same speed as meshing gears. For a respective free space 40, this leads to the needles 32 projecting into the free space 40 specifying a fiber transport direction which is either directed into the interior 34 or out of it. In this way, fibers can enter and be conveyed out of the interior 34 several times in the desired manner before they finally leave the fiber processing space 20 through the deposit opening 16.
- the number of 8 needle rollers shown in FIG. 1, as well as an alternatively possible number of 12 or 16 needle rollers, has the advantage that the transport direction within diametrically opposite free spaces 40 is opposite, so that fibers in the situation shown by way of example in FIG. 1 do not pass through the upper free space transported into the interior 34 and immediately leave the interior 34 again through the lower free space.
- a cylinder-like curved screen 42 is provided below the needle rollers 28.
- this sieve is formed by a multiplicity of rods running parallel to the longitudinal axes of the needle rollers 28 and the axis of rotation of the needle roller carrier. These rods have a circular cross section and a diameter of 2 cm. The distance between the bars is also 2 cm.
- Such a sieve is suitable for fibers with a maximum fiber length (staple length) of approximately 40 mm. These are fiber lengths that are common with cotton fibers and with viscose staple fibers.
- sieves of conventional opening geometry that is to say with round or oval holes or longitudinal slits, can also be provided for other types of fibers.
- the distance of the screen 42 from the free ends of the needles 32 is between 1 and 30 mm and preferably between 1 and 10 mm.
- the side walls of the fiber processing space 20 are drawn inward in the area denoted by 46, so that there is a narrowed fiber inlet opening above the needle rollers 28.
- Their width which can be seen in FIG. 1, corresponds approximately to 1.5 to 2.5 times the width of a respective free space 40 between adjacent needle rollers 28.
- side wall regions 46a drawn in below the needle rollers 28 can also be provided his.
- the gussets remaining between the optionally drawn-in side walls of the fiber processing space 20 and the needle rollers can be provided with fiber guide bodies 48 which limit the free space between a respective side wall and the needle rollers.
- These fiber guide bodies 48 are connected to the needle roller carrier 26 and rotate with it. Similar fiber guide bodies can also be arranged on the central shaft 24.
- Freely rotating rollers which are arranged on the underside of the side walls and seal the fiber processing space 20 below the sieve 42 with respect to the conveyor belt 14, are not shown.
- Tampons are currently formed as nonwovens with long fiber materials using carding processes, i.e. H. the fibers are laid down in the longitudinal direction with the direction of advance of the endless storage belts.
- the directional laying form creates an imbalance in the tensile strength between the direction of advance and transverse to it.
- the tensile strength is higher in the longitudinal direction than in the transverse direction.
- the long fibers of up to 60 mm deposited according to the method described in this application result in a different, more uniform strength, improved for the area of application, which has a positive effect on the article tampon.
- the device according to the invention the method according to the invention is used to produce a fiber bed from viscose fibers for tampons.
- These fibers are either so-called trilobal shaped fibers or conventional round fibers or a mixture of both.
- Typical fiber parameters are 1.7 to 6.7 dtex with a length J between 20 and 60 mm.
- a typical basis weight for a fleece for such an application is between 200 and 1000 g / m 2 , depending on the tampon type.
- Cotton fibers are occasionally used for such fleeces for tampons.
- the final nonwoven can be composed of two or more layers. Each of these layers can contain fibers of different specifications. After the fiber bed has been formed, it is compacted with calender rolls and delivered in rolls or blocks as an intermediate product for the manufacture of finished tampons.
- the device and the method described here also allow flax fibers or hemp fibers or similar natural fibers to be processed on their own or mixed with synthetic fibers.
- the fiber length of such natural rather fibers is typically 50 mm. Since these fibers are a natural product, there are also fibers that are shorter than 20 mm or longer than 120 mm.
- the synthetic fibers can be either polypropylene fibers or polyester fibers, the dtex values of which are between 1.7 and 20.
- the fiber length of the synthetic fibers is 12 to 38 mm for this product example.
- the basis weight of the corresponding nonwovens is typically between 1200 and 2500 g / m 2 .
- carrier webs with a basis weight of 40 to 100 g / m 2 .
- the fibers used here are synthetic binding fibers, in particular so-called bicomponent fibers, whose dtex values are between 1, 7 and 20.
- the fiber length of the synthetic binding fibers is 3 to 36 mm.
- the backing nonwovens can be the base for further layers to be deposited with functional components, since they act as compacted backing nonwovens for fibers and / or components like collecting filters.
- the carrier fleece is unwound on the conveyor belt 14 and the fibers and / or functional components are deposited on the carrier fleece instead of on the conveyor belt.
- Nonwovens for hygiene items such as baby diapers. Sanitary napkins. Incontinence products and the like.
- SBR styrene butadiene rubber
- EVA ethylene vinyl nyl acetate
- a typical basis weight for such nonwovens for hygiene articles is between 20 and 100 g / m 2 .
- Nonwovens for use as moist cosmetic skin care wipes are provided.
- the described device and the method can also be used to produce a fleece which contains polypropylene fibers or polyester fibers with dtex values between 1.0 and 3.3 and fiber lengths between 24 and 38 mm.
- viscose fibers or loosened wood cellulose pulp fibers can be mixed with the polypropylene or polyester fibers, either as a uniform mixture or in layers.
- the nonwoven is hydroentangled or matted in some other way. Latex can also be applied to one or both surfaces of the nonwoven to prevent linting.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410021453 DE102004021453A1 (de) | 2004-04-29 | 2004-04-29 | Formkopf und Verfahren zum Herstellen eines Faservlieses |
PCT/EP2005/051971 WO2005106091A1 (de) | 2004-04-29 | 2005-04-29 | Formkopf und verfahren zum herstellen eines faservlieses |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1776496A1 true EP1776496A1 (de) | 2007-04-25 |
Family
ID=34967319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05747189A Withdrawn EP1776496A1 (de) | 2004-04-29 | 2005-04-29 | Formkopf und verfahren zum herstellen eines faservlieses |
Country Status (7)
Country | Link |
---|---|
US (1) | US7690903B2 (de) |
EP (1) | EP1776496A1 (de) |
JP (1) | JP4755641B2 (de) |
CN (1) | CN1981080B (de) |
CA (1) | CA2564858A1 (de) |
DE (1) | DE102004021453A1 (de) |
WO (1) | WO2005106091A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202009012819U1 (de) | 2009-09-24 | 2011-02-10 | Matecs Sp. Z.O.O. | Anlage zur Herstellung von Faservliesmatten und damit hergestelltes Faservlies |
CN102575393B (zh) * | 2009-10-21 | 2015-01-21 | 3M创新有限公司 | 多孔支承制品及其制备方法 |
EP2490889A4 (de) * | 2009-10-21 | 2014-01-22 | 3M Innovative Properties Co | Poröse mehrschichtige artikel und herstellungsverfahren dafür |
DE102009055951A1 (de) | 2009-11-27 | 2011-06-01 | Glatfelter Falkenhagen Gmbh | Absorbierende Struktur |
DE102010006228A1 (de) | 2010-01-28 | 2011-08-18 | Glatfelter Falkenhagen GmbH, 16928 | Flexibles, stark absorbierendes Material |
US20110184365A1 (en) | 2010-01-28 | 2011-07-28 | Glatfelter Falkenhagen Gmbh | Flexible, highly absorbent material |
DE102010034778A1 (de) * | 2010-08-18 | 2012-02-23 | Hubert Hergeth | Trennstab |
DE102010035944A1 (de) | 2010-08-31 | 2012-03-01 | Oerlikon Textile Gmbh & Co. Kg | Verfahren und Vorrichtung zum Trockenformen einer Faserbahn |
EP2798107B1 (de) * | 2011-12-30 | 2018-01-24 | 3M Innovative Properties Company | Verfahren und vorrichtung zur herstellung von faservliesbahnen |
CN104220661B (zh) | 2011-12-30 | 2019-04-12 | 3M创新有限公司 | 用于制备非织造纤维网的设备和方法 |
CN106821606A (zh) * | 2017-03-07 | 2017-06-13 | 广东鑫雁科技有限公司 | 一种卫生用品芯体材料木浆纤维施加装置 |
DK180089B1 (en) * | 2018-11-21 | 2020-04-17 | Campen Machinery A/S | A former head and an apparatus comprising such a former head |
JP7172518B2 (ja) * | 2018-11-30 | 2022-11-16 | セイコーエプソン株式会社 | 繊維体堆積装置およびシート製造装置 |
DE102020125404A1 (de) | 2020-09-29 | 2022-03-31 | Voith Patent Gmbh | Luftlegeeinrichtung |
CN112981709B (zh) * | 2021-01-21 | 2022-01-04 | 南通江淮衬布有限公司 | 一种积流反弹辅助型无纺布水刺加工工艺 |
Family Cites Families (16)
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US2743231A (en) * | 1951-12-08 | 1956-04-24 | Heyden Chemical Corp | Process for the dyeing of nylon fibers and fabrics with 5-chlorosalicylic acid |
US3731686A (en) * | 1971-03-22 | 1973-05-08 | Personal Products Co | Fluid absorption and retention products and methods of making the same |
US3731685A (en) | 1971-04-01 | 1973-05-08 | W Eidus | Moisture indicating strip for diapers and surgical dressings |
IT1180751B (it) * | 1984-04-27 | 1987-09-23 | Mira Lanza Spa | Testa distributrice per la deposizione uniforme di materiale fibroso disintegrato su una superficie di formazione di uno strato di fibre negli impianti per la produzione di carta a secco |
EP0159618B1 (de) * | 1984-04-27 | 1988-01-07 | MIRA LANZA S.p.a. | Vorrichtung zur gleichmässigen Verteilung eines zerteilten Fasermaterials auf eine Bildungsfläche für Faserschichten in Anlagen für die Trockenformung von Papier |
DE3416007A1 (de) * | 1984-04-30 | 1985-10-31 | Henkel KGaA, 4000 Düsseldorf | Verfahren zum herstellen des dufttraegers einer kunstblume und nach dem verfahren hergestellter dufttraeger |
JPS6350531A (ja) * | 1986-08-13 | 1988-03-03 | Showa Denko Kk | 混綿ウエブの製造方法およびその装置 |
GB2208277B (en) * | 1987-07-30 | 1991-11-13 | Courtaulds Plc | Cellulosic fibre |
JPH101856A (ja) * | 1996-03-12 | 1998-01-06 | Chisso Corp | 熱接着性不織布 |
SE513240C2 (sv) * | 1996-05-31 | 2000-08-07 | Sca Hygiene Prod Ab | Textilfiberförstärkt absorberande material |
DK172432B1 (da) * | 1997-12-23 | 1998-06-15 | Carsten Andersen | Formerkasse for apparat til tørforming af et fibrøst væv. |
WO2001092621A1 (en) | 2000-05-31 | 2001-12-06 | M & J Fibretech A/S | Plant and method for dryly producing a non-woven fibre web of short and long fibres, a cotton fibre web containing cotton linters pulp (clp) |
CA2459414A1 (en) | 2001-08-20 | 2003-02-27 | Dan-Web Holding A/S | Former head with adjustable needle rollers |
US20030194937A1 (en) | 2002-04-10 | 2003-10-16 | Yarron Bendor | Composite abrasive articles and a method for making same |
ATE505586T1 (de) * | 2003-07-02 | 2011-04-15 | Celli Nonwovens Spa | Mischvorrichtung für einen stoffauflauf zum trocken-formen von papier und verfahren dafür |
PL1680264T3 (pl) * | 2003-11-07 | 2009-08-31 | Formfiber Denmark Aps | Urządzenie rozprowadzające włókna do suchego formowania wyrobu włóknistego |
-
2004
- 2004-04-29 DE DE200410021453 patent/DE102004021453A1/de not_active Ceased
-
2005
- 2005-04-29 EP EP05747189A patent/EP1776496A1/de not_active Withdrawn
- 2005-04-29 US US11/587,108 patent/US7690903B2/en not_active Expired - Fee Related
- 2005-04-29 WO PCT/EP2005/051971 patent/WO2005106091A1/de active Application Filing
- 2005-04-29 CN CN2005800138504A patent/CN1981080B/zh not_active Expired - Fee Related
- 2005-04-29 CA CA002564858A patent/CA2564858A1/en not_active Abandoned
- 2005-04-29 JP JP2007510042A patent/JP4755641B2/ja not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2005106091A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP4755641B2 (ja) | 2011-08-24 |
US7690903B2 (en) | 2010-04-06 |
CA2564858A1 (en) | 2005-11-10 |
WO2005106091A1 (de) | 2005-11-10 |
US20080241301A1 (en) | 2008-10-02 |
DE102004021453A1 (de) | 2005-11-17 |
JP2007534857A (ja) | 2007-11-29 |
CN1981080A (zh) | 2007-06-13 |
CN1981080B (zh) | 2010-11-10 |
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