HUE025176T2 - Kompozit szalag elasztikus és nem elasztikus tartományokkal, eljárás kompozit szalag elõállítására és horgokkal ellátott csík, különösen kompozit szalaghoz - Google Patents

Description

COMPOSITE FA.BR.fC SHEET WITH INELASTIC AMD ELASTIC REHÍÖNS, METHOD FOR PRODUCING THE SAME AND HOOK MATERIAL IN STRIP FORM*. IN FARTiCOLAR FOR A

COMPOSITE FABRIC SHEET

The invention relates to a composite material web with elastic and inelastic regions front wMch nappy closure elements can be punched, The composite material comprises a nonwoven web which forms a first outer side of the composite material web, elastically stretchable Elm strips usually arraugedparallel to one: another which are disposed on the nonwoven web, a nonwoven material which covers: the film strip ott a second outer side of the composite material web aM at least one mmroíastic strip of a hook material which bridges a region between two adjacexst elastic stretchable Elm strips. 1¾ the manafacture of composite xnalsriat webs fer nappy dost® elements it is known from FF 2 301 502 A1 to laminate elastic strips between two flat nonwoven webs, where Mtemately a direct joining; of two nonwoven webs or the incorporation of a reinforcing strip is made between two adjacent elastically stretchable ftjib ships. At that point where the two nonsohven webs are directlyjohted tootse another, the happy cfosurc elet»

Ihsreoed to a disposable article such as á baby nappy or a hygiene product for adults, whilst the section with foe elastfoiflly stretriiahle hint strip gives the nappy closure piement the required elasticity. that point where the retnibrcmg strip is disposed, a hook band can then be attached subsequently where the reinforcing strip is required so that the nonwoven material does not tear uncontrollably under tension. For the same reason an Overlap Is provided between the reinforcing strip and the elastically siretchabie Elm strip. A composite material web having elastic and inelastic fegiohS: H also fotown Ifom IF 1 736 306 AT, where elastic and inelastic regions there are formed by a corresponding: adhesive application. The adhesive is provided it) this case to reinforce the material to a spficknt extent where accordingly an adhesive bonding is only provided it), sections on classically stretchable Elm strips. However. the subsequent arrangement of a hook material op the outer side «an be probietüaíical since tire material underneath the hook band is only reinforced1 by a eOntfonöds adhesive layer. A etmtpbsito material web halving the features described initially Is knotm from IP 2 3# 796 A i, where here also· the lipok material is :|ldbd outside onto on» qfrwo Pat rionwp yeti webs, In order so give ibé material óVeral! a sufficient suexsgth. another son-elastic strip is provided for reinforcentem: or, the opposite sides. The application of two opposite non-elastic material strips is: expensive with regard to material costs and process control.

Known from EE # 768 :075 SI is a disposable nappy with lateral reefosnre elements which have no elastic regions. The necessary elasrieity of the entire disposable nappy is achieved by providing an elastic element in a front waist region whilst the: nappy closure elements in the form of lateral wings am rigid. A hook material is provided: ots the .lateral nappy closure element» •which at its edges: is covered by a protective layer of nonwoven. Thy nonwoven extends in this· case over the hooks of :fhe: hook ejenienis with the resfolt ihat only at) inadequate lasteniltg of the protective layer ismusde possible jhere, 'Finally there is also thg rikfc that fire protective layer of Mnwoveh: is unravelled üncNrstrpIlably by the hooks.

Known from WO 99/13743 A1 is a &©ok material which has hook-free edges where the siook-free edges are covered by a cover material. lies arrangement dessrihed is provided to be i&trangedi in the waist region of a nstppy la order to be able to testen nappy etesure: elements thereon winch comprise a loop material. It i$ apt; described :tö tpalíé fbe ariaiigernent known from Wp 99/13743 Á.1 elastic sn sections. ft is the object: of the present invention to provide a tfomppsite materia! web with das# and uielastie: regipiss from which hiippy efosrire elements can be pimehed whteh can be manufactured mexphsisively and easily and Which enables a teilteiefiriteising of a hook material, fiorihennore, a suitable method tor manuteefuring such a composite material web and a particularly suitable: hook; material for this is to be: specified!

According: to; $·$# aspect of tbs invention* the object Is solved {darting inm a composite material mb .having É© |batoes:the dfrip of book material lass hook-free edges, Which are each overlapped by an edge of The adjacent nohwoven material. Accordion to the invention, the hook material is integrated in an unpros cd mannerin the:composhe material web and is disposed at least at lis iipok-free edges on the inside. The elastic regions of t|te coibposiis materia! web: formed: by the elastically sfretchafele dim snips extend as far m directly approaelimg: the ihpok material. Even under repeated stressing of the composite material web or a closure element: formed; diernfrosn. a tearing in the region of the Itook material cannot occur because this is incorporated In the composite materia! at least by the nonwoven material at its hook-free edges.

The présetrt invention is based on the finding that in the case of the composite material webs with elastic and inelaslie regions írom winch nappy closure elements can he punched, known from the prior atf,: an additional reinforcement in the region of the book material Is always necessary. According to the: present invention, this luneiiort is however taken ewer by the book materia! itself where the hook materia! with its book-free edges on the one Inntd fornts a sufficient reinforeemeat of the composite taaterial web mid on the other hand enables a hooking with atr assoeiated tnahag stafase. in this ease, if shouldbe homo in mind that appreciable forces act ott the hook material and in particular the fastening of the hook material in the composite matériái web during use. The width of the hook-free edges should be selected so that a: secum fastening of the at|ae®nt nonwoven materia! is possible. The width of each hook-free: edge can, for example, lie between 2 mm and 3t) mm, preferably between 8 true and 20 snm.

The sfonwosteh ntatertal covering the film strip -m the second side of dre composite mstetM web is expediently provided in the form of spaced-apart nonwoven strips where hooks of the hook material, preferably all the hooks of the book material are disposed between the nonwoven strips. In the region of the hook material the edges of the nonwoven snip can [he] exactly along the edges of the elastically stretchable film strips located thereunder in each ease. Ibis can be achieved, for example, #b .éJMiésfiy ^reteh&bk film strips are provided as secfipns of a. eoripsponding pne-lterunate, Stfothrg from this common edge, ibe elastically stretchable film strips and she film strips disposed thereon can either haw the same or a different width, in the case of a different wid th, a region in which ííte n^pövip sfcajp» «s& d*tectíy-:#É fte :¾¾ nohwtwen weh ls then obtained.

Furthennore. u is possible that the nonproven material & the region of the hook: material goes beyond the elastically stretchable film strips located thereunder, i.e, projects laterally beyond the elastically stretchable film strips. Tips is possible in particular if the fi lm strips and the nonwoven material are stippled separately in strips and then laminated at the same time or immediately oiler one another so that no pte-lamittete needs; fo he provided. With such a eOirfigararion it is in partteirlar possible that the book-free edges of the hook material are only overlapped by Éé SöhWOven material and sót by ihe elastically stretchable fsim strips. The edges of the elastically stretchable Hint strips are than disposed within the framework of such a configuration laterally of the hook-free edges of tbc hook material so that a particularly uni form transition can be adueved, in particular if the thickness of the hook material at its edges lapprékhnaiely eoreesponds to the thickness of the elastically stretchable hint strips.

According to a preferred embodiment of the invention, the: hook material is fastened directly on the flat nonwoven web. Also the elastically stretchable film ships can be fastened directly os the nonwoven web -outside die overlap region wife to hook-free edges of fee hook material. lit principle $Mom possibilities ean be cortsidersd :fe the fastening, The fastening cam fer example, be accomplished by adhesive; which can he akiied over the entire surface or only in regions as retptod. Depending on the type of adhesive bonding and depending on tire joining parameters, a strip-shaped adhesive bonding can be sufficient to securely fasten the hook material. By means of astrigsslfeped adhesive bonding, in principle adhesive can fee saved whereby a cost reduction is obtahied. it should also fee borne in mind that suitable adhesives are not only relatively expensive but can also adversely affect the elasticity. This negative influence of the adhesive is reduced by a strip-shaped application below the film strip. In particular, a strip-shaped adhesive applieation parallel to the extension of the elastically stretchable film strip is advantageous.

The elastically riretehfele film Strip consists of a suitable thermoplastic elastomer where ikparifouiar a polymer from tire group of styrene itutadiene styrene block copolymers iSBSf. styrene ihoprene styrene block copolymers (SIS), styrene ethene bfeetse styrene block copolymer (SfeBSj, elastic pplyethylene copolymers, elastic polypropylene copolymers^ -elastic polyurethane pppolymers, elastic polyamide copolymers or a. utixiure of ihese polymers is suitable.. In addition to a use of inpnofilms, eorextoded fifth» can also he used, where eo-extraded films comprising a plurality of identical layers are: also: suitable,; Filin atirps having a thickness between 10 and 130 pm are particularly suitable.

Tire horiWoue®. material eovermg the elastic strips on the seebtid hutér" side and the nonwoven web disposed on. tire opposite side of the crimp·, wile material web are usually not elastic themselves but suMcteutiy sfretshable in order to be able to fefm the elastic regions of the comptote mtorial web, ifewever, the necessary strefchafefey cam alsó hé iíeCrimpiisbéd by aa aetivatioa of the comptfeito material web by a first strofeluag in which the nonwoven layers are also partially destroyed, Id, tom.

The nonwoven gives the composite material web a soft textile feel. Depending cm the cordigumtion of the composite material web however, the nonwoven mast also have a certain strength. This ts ;n particular the case with the previously described configuration in which the elastically stretchable film strips end laterally of the edges of the hook material or adjoin edge to edge the edges of the hook material. The nonwoven then serves to avoid a tear in: the régión of the transition hetween the elastically stréföhablé stnp feid the hook: material.

The subject matter of the iu venison is also a method for manufacturing a eomppsito material web with elastic and inelastic regions horn which nappy closure elements can be separated, in particular punched out, wherein a nonwoven web is supplied, wherein a hook material m strip form |s;-s^plred:,whtch to: hook-free; edges·or on which hook-free edges are fenned, vrfrerefe the Id# material is fastened with a usually flat rear side opposite the hooks on the nonwoven web and wherein thereafter elastically stretchable film strips and nonwoven strips are supplied in such a snanuer and fastened to the uonwoven wsb that the film strip* are disposed between the ttmíwöven web and Été nohwoveh strip and feat fee feriok-fiee edges of Öté lmok material Pfo; overlapped at least partially by fite edges of associated fifes strip aife or nonwoperi. strips.

With the- method described: It i:s possible to ísniínfotciure the previously explained composite material web fey simple means. Aé has already 'Mm explained in: connection wife the eonrposite material: web itself fee film strips could basis be already joined to an associsied nonwoven strip before joining to the mrmovm web- fe pariicukr, the film strip and rise nonwoven strips johted fecreto cap be provided as sections of a corresponding pre-laminate.

Within fee Ir&mework of the invention, there are various possibilities for joining tbs infevidual elements of tbs composite material web. Urns, for example, the hook material in snip foots eon be adbesively bonded to the nonwoven web on a rear side opposite rise books extepivelg or alternatively only In seefions, Extensive adhesive bonding within the framework of fee Invention means that foe adhesive is applied extensively jo the mar side of fee hook material andforihe associated1 surface of foe nonwoven oath. As a result of fee structure of foe nonwovmi web, however, pores or the like can remain at Which tio adhesive bonding takes place locally; lit the esse of a sectional adhesive bonding, in particular adhesive strips running in tire longitudinal direction of fee \u p shaped hook material cat; be provided, which cat) be configured bothMstraight and as wave-shaped. In the case of a wave-shaped adhesive bonding, fee advantage is obtained thai foe'outer edges are always adhesively bonded to a certain extent.

Farfoormore,. foe joining of fee Individual elements eari also be made by ultrasound technology, i.e. fotrasoand welding. A mechta#al and/or thermal joinfog Ü also considered as a forfeef alternative.

If fee film strips together wife fee nonwoven strips are fe be provided as foetions of a corresponding pre~ laminate, during manufacture fee hook material nmst be fastened in strip form on the nonwoven web and the sections of the: pfodfenmaie on the ootiwoven web and In foe overlapping region on the hook materia). Since fee overlap region is relatively small, particular care must be taken there to ensure a reliable join. At all the joining points the various methods described, namely an extensive adhesive bonding or an adhesive bonding provided in sections as well as a joimsg: by ultrasound technology are feasible. However, the- fastening of the hook material to fee nonwoven web fey means of ultrasound technology can fee difficult since there is the risk that foe fee hooks wifi fee desfeoyed fey fee exposure to utosound. However, this disadvantages does not arise if foe ultrasound welding only takes place on the hook-ifee edges of the hook material. In principle, a combination of adhesive bonding and nltrssound welding is not ehminated. A further aspect of t he present invention which has independent inventive importance relates to the formation of a book materifo. This hook msforial is particularly suitable for foe previously described: composite material web but can also be used in principle in other areas. To form fee hook material a polymer melt is fed Írom a wide-slotted nozzle into a gap between a roller and a band guided in sections along the surface of foe roller wherein foe roller andfor foe band has a sfeieturing; provided to hum hooks, Depending on foe configuration of fee method, dither eOfoplete hooks with stems and end-sidb heads or initially only fee stems can be formed, where the heads are then produced subsequently.

Within fee femework of fee invention, hooks are understood as elements which are suitable tor befog hooked in an associated material, for example, a textile knitted wife fine loops or a nouwoveu feeing loops. The books can m this case both comprise ends bent on foe stents or also mbriiroom^shaped fetoademngs as heads.

Since m initially still liquid polymer tőéit css be a^plsed tarí&e slotted notodé outo the pp, fee shape of the Seeks of tile hook material CSS: be very Íleeijí esned. Thus, for igxsrnple,:: tbe strUetmfUg :pravidcd to Sfesi the books on sections of the band or -he roller can be interrupted m order sot to form any hooks there, in particular, the structuring can he interrupted in the transverse direction and/or eimnmferentiai direction where hook-free regions are then fenned by a flat surface.

In addition to producing regions with boults its well as book-fee regions, in fee method described the roiier gap; •and therefore fee ted fei:ckoess; of ibe: hook material produced can be adjusted by a corresponding contouring of fee band attorn? the roller. In parileular, in hook-fee regions fee thickness of fee roller gap can be reduced by projections of fee itasd asrifor the roller so feat in fee structured regions to form the hooks, carrier seciurts can be formed underneath fee hooks which have an increased thickness compared with fee hook-free regions. Such a step-shaped configuration is partictfetrly advatsageous: when a material overlap is provided on fee hook-tree regions as in the priwtousiy described composite material web. Tip contouring can aiso be produced or at least supported by a cupfoured extrusion n<v.*le gap. Íven if tisc feeit is still liquid arid deformable after extrusion, differoni amounts iff mohén mass eua bii provided irt soméfegfehs hs a result -of such a xnouidtBg by means of the contoured extrusion nozzle gap in order to then facilitate a specific contouring by means of fee band and or '.he roller. if according to a fest variant to form fee hook material, a smooth band also designated as sleeve and a structured roller t cbtlfesfe arc used, fee stems of fee books am pndneed by fee structured, usually cooled roller (chill roil).

Wifein the ftetewbfk of tin; structuring, recesses or cayiiPs are formed to form the sterns of the books in the roller. To this fend* fee roller surface Can, for example, he progdaite-hy m. Üéhísg method of by using a laser. The untnbef add distribution of fee Cátdiies can be variably adapted to fee particular case of application of the hook hand ιό he formed.

The barid cán, for ókámpie, be produced eomptefely seamiessiy by a galvanic process. Such a band, which is also designated depending on fee application as smoothing band Is usually tensioned between two tampered rollers of which at least: one cap. be driven. The tensioned band is usually pressed by a movable roller mill against the shuctered cooled roller, .ás a result of pressing lire baud in a, usually variably adjustable wrap-around angle, It is aemeved that the hwfedly still liquid polymer melt dlls: fee recesses or cavities of fete structured roller. I» this case, m additional deaeration can usually he dispensed: wife where: a multilayer eonltguratten of the roller lor fee deaeration is not necessary. As a result of the contact with fee circulating hand during the formation of fee sterns of die hooks, the cooling ean:be better controlled with fee result feat matroiaeture is also possible at a very high produotiou speed. By using the band described, a partieulgrly uniform, smooth te; high-quality rear side of fee hook materia! can also be produced.

As has already been explained, the structuring can be interrupted in the longitudinal direction, transverse direction or also in an arbitrary direction itt order to produce hook-tree regions. Áeeorfeng fo a second variant to form the hook material, a smooth roller and a structured or perforated band are used, Wife a perforated band a sulffeiem deaemtfon of flte individual holes to produce fee stems of the books is ensured under all circumstances. The length of the stems to be formed can also be adgtsted by the thickness bí fee band. Alternatively the krogth of the sterns can also be adjusted by the contact pressure of the band oft the roller, where then, at: a reduced contact pressure the holes of fee pefforatidh: are only partially füled. By maims of &amp; variation of the contact ppssarp, ilse- height of the sterns of the Itooks can he varied in this case without exchanging die band, fa· addition to a substantially paaciuafo -perforata or structuring of the roller or band, flat, more extended projections can also be provided on the band or the: roller to vary the gap between she: roller önti :íhe band És some regions- Thus, according to a: further variant to form, the hook material, it is provided thai both the roller sad also the band are provided with a Sírúeiutiug: and-'or with projections. Thus, for example, the band can be provided with a sectional perforation whist the cooling roller is pros :ded wish projections which, for example, extend in linear form in the circumferential: direction or In the transverse directum. By tnenns of stteh a: configuration,, the thickness distribmjon oí the hook material etet be adjusted, in particular it is possible that carrier sections fortned underneath the IfoOks have a greater thickness titan hopfefiee regions.: Advtebageously the hooks titen pfoject for outwards where a saving of material is possible as a result of the: (educed thickness at the hook··free regions. depndisg pu lfow Éé hooks are termed, however, starting troin a material having initially uitiiosm thickness, due to the fortntefoh: Of the hooks a cOiiSfoctfoh cue result from the fact that the material of the hooks-Is pulled outwards, if then during msmdaeture no polymer mass flows subsequently tfom the: aides, starting front an iitMally UiUferm thtultetss a. constriction is obtained over the entire width on the carrier1 section undemeaih the: hooks Som Which, however. lbs hooks still project sailieiently. As a result of the possible reduction of the thickness: on. the hboksfree regions, this undestred disadvantageous effect can be compensated to a certain degree.

As a result of the structntfog of the roller and the baud, h. is also possible to form hordes on both sides of the hook material

If the band is provided with a perforation, according to a preferred further devetepiuetfo it can be provided that the polymer melt is initially pressed through the perforation and then directly on the interior side of the draemferaniial band, bent or pressed Hat by a teher device to form heads. For example, a feiher relfea or an additional bárul can be provided for this purpose inside the circumferential band.

Alternatively the head stmeture adjoining the stem can also he produced in a subsequent process step, where the previously formed stem is UteWnaily andrisr HteelWbltrtily deformed. Tim msehanteaf forming of the stem: ends to form the heads is preferably accomplished in a roller gap in which at least one roller is driven and the roller feeing the stem ends is heatable. In addition, the hook band can be preheated in advance to a heating temperature for which in particular an infrared emitter is suitable. Furthermore, it is also possible to form the head structure by using an ultrasound technique where the head structures are fonnod in a gap between a roller and a sonotrode by a defined contact pressure under ultrasound.

With regard to the handling of the previously described composite material weh, :fr can be advantageous to initially form the stems without heads or curved enda, where these ntouidfogs prpuded for Ifooking are then also only produced after forming the entire composite material web, Without the; mpuldfogS provided for hooking in the form of heads or curved ends, the composite matetM web cad easily be Wmmd and unwound again. without the stems, which imiMfy telll run straight, being afote to fosok into one another. Only when the composite: material web is unwound for further processing, i.e. in particular to produce nappies, are the heads or curved ends fenned, fer which purpose for example a pressurization in a heated roller gap eanhe provided.

As deserted previously, hooks m stems can fee fonued oa boái site öf te took material. in particular if h íresslbfe to fern books on one side of toe took matériái md stems only on the side, if seek a hook material is used for te protosction of tto previously described composite material web, te took material can fee placed with to straight tunning stems on te eontinuons mmi -web which tents toe first outer side of the composite material web. The stems then pierce through this plastic web and project as spacers, 'The opposing books ten to freely, as deserted previously, on tto opposing side between te strips of ito nrinwriven mterittl provided there. If stoho edmppsto material wefe is wound M multiple Shyers, die stents and hooks lie one abbve the oter iii sxieeessive layers wfeete as a restilt of the length of te stems the layer of the composite material wefe located ttoreuhder is held at a distance whereby it is also avoided, that in the wound state the hooks interconnect the individual: layers in as undesirable maimed

Ihe took: material cm be constructed of different tetelaik both in single layers and also in multiple layers according to the requirement and area of usage. In flic case of n single-layer struetnro in particular polyolefin materük suefems polyethylene i PE), polypropylene (SI*)* mixtures of te said polymers as well as a copelynter of polyethylene dtoi polypropylene are suitable.: Fariicalarly preferably used however are stiff PP types winch can be present: both as homo- and as copolymers- furthermore feowever, ester· polymer*: are also suitable: for a single-layer Of tnulliplc-kyer stmeture, 1« parihtoar, comparatively stiff materials: such as: eyclookfin ce^olymer (CQCj, polyester such as tor example polyethylene íerephítolaíefFET), polyamide (PA); :such as tor example PA fe and PA fe.fe or also polymethyltetoacrylshs (PMMAj are also advantageous.

Ah a result of a multilayer structure of the hook band, die partly conflicting requirements of toe example, stillness, dowafedity during manufacture and compatibility with te adjacent layers in te laminate can fee adyankguously satisfied. According to a first variant, largely single-type structures or at least structures eojmttoeiy of polyokfln are; possible, whereby in psriieular a recycling is ftoilliated. For example,, in te ease of a three-layer structure polypropylene (PF) eaa fee provided tor all layers, where however the layer from which te hooks are to be formed ts selected especially with regard to an improved embossing behaviour with a high Sow index (MET) whilst the other layers are specifteallv optimized with regard to te required stiffness of the hook band*

In -addition to such a single-type structure, a multilayer sttucture: of various material types is also possible, where preferably poiyolefts-basod materials, in particular PF are preferably used in te outer layers, lit the ease of a structure comprising at feast three layers, an interior core layer can be selected with regard to a maximum stiftess, Whereas in a tore-layer structure in each ease at) adhesion promoter layer is disposed between the epre layer and te safer core layers, in a teeetoyer structure a suifMeut joining of tto layers to one another can fee achieved fey ftoctionaliked or modified polyolefins.

The thickness of the took material at the toók-free edges and underneatit tto hooks is typically between 20 and 180 pm. if the hook-free edges are not provided with a lower height, the toléltess at these: edges and the thickness of the carrier section disposed under the hook is particularly pretorshly between 7b and 140 pm. In this case, it should be borne in mind toweyer that as a result of tto toreuatlon of toe hooks, tto carrier section can fee constricted to a sertato extent starting írom the given thickness.. in a single-layer configuration of toe hook material, all te sect ions of te book, tUstieriai are formed trout tto same polymer. In a multilayer site tore fen too Other toad toe books are usually temed írom toe material of the corresponding outer layer. If however toe stiffness of the books is too low tor a case of spptostifen, a different: eosrttguration is :als© possible in which the hooks 1« a multilayer structure are fermed: at feast partially from the: material of art internal layer. This can be achieve!* :l%f example. whereby in a multilayer structure the thickness of the outer layer on which the hooks are produced is reduced to such an extent that Ée material of the layer located: thereunder hi a corresponding process is m essential component: of the stems or hooks.

The length of the hooks is usually significantly greater than the thickness of &amp; carrier sec tion of the hook material on which the hooks are disposed. Tim length of the hooks is preferably two to ten times, particularly preferably tines to seven times I® thickness of the carrier section umfetneaih the hooks.

The subject matter of the: invention is also a hook material in strip: form, in particular for the previously described composite material web. where the hook material comprises hooks arranged on a carrier section as well as hook-free edges at the sides thereof According to the invention, the hook-free edges have a reduced thickness- compared with the etutfer section, where the thickness at the hook-fese edges is preferably less than SO % of the thickness of the carrier section. 1'he hook-bee area ;s between 111 % and 60 % of the total area. With such a hook material there is the adx^ntage that the hook-free edges sfe eptttpamtiesiy thin so drat it IS easily possible to arrange another material there in 3« overlapping manner* A parhculatly adSeinaceous mtotufectore: is possible with regard k| the pevionsly described composite material web. in this ease, it sijould foe home in tnind that the hook material underneath the hooks must have a sufficient ihicteess: hr order to hold dsn itoiyiduai hooks, hr die edge regions the tensile tomes are tmttormly festrihuted however so that a smaller thickness IS süífíeient there. As a result of the reduced thickness at the hook-free edges if ia Mtially achieved that the ilddiiidijif :φφΜ ihrther compamdiMth the nosrWovetr material disposed on the second outer side of the composite material web. Also the step which must be bridged by the eksucai-Y stretchable him strip m the cnerlap provided according to the invention is smaller. The stability of toe itotire composite material web can thereby he iinpfoyed.

The present: invention is explained hereinafter with reference to drawings which merely show ekempfary embodiments, in a schematic view :f'lg,l: shows a partial section of a composite ntdferial web in a cross-section.

Fig. 2 shows She dements shown in Fig. 1 in a view separated from one another.

Figs. 3A to 3C show alternative embodiments of the composite material web in a view according to fig- fe

Fig. 4Λ shows the arrangement according to Fig. '3, where a; larger area of She composite material web is shown,

Fig. 4:B shows a redosure element punched out: fforh the composite material web according to

Tig. da,

Fig. 4C; shows a plan view of a. conrpos i te material web with a punching: pattern tor separating individual closure elements,

Fig. 5A shows a preferred embodiment of a hook material,

Fig, SB: shows art alwrifetive: embodiment of a hook: material,

Fig.b. shows an arrangement to produce a hook material, f igs.: 7A,to 7.Ö- shows a hook material: wish hook-haie regions in different embodiments,

Figs. 8A to 8D shows a hook material according to Figs. 7A. to 7D with an additional regional \ ariatson in thickness.

Figs, 9 A tö 9€ shows a hoek material wdíh hooks ón both sides.

Fig, 10 shows a, composite material web wound into lasers.

Figure 1 shows m híóss^véboa a setdiOb of a cchígsosiífi material wÉ 'having elastic arid inelastic regSSms fifim whi# S#fiy éhsstÉbf§iyiéh.ts· craibh punched. The cotnposite material web comprises a Sat noowoven web I whit® ferms a first osier side of fee cotnposite material web, Ih order to produce the elastic regions of fee composite material web, elastically stretchable film strips 2 which are spaced apart parallel to ope another ate disposed oh' fire fioowovfih wab i. where these filth strips '2 are covered by a noswoven material 2. The nonwoven material 3 disposed Is the Ions of nonwoven stops completely covers the film strips 2 ann Forms a second outer side of the composite material, web in soiae regions, lit addition, a .hoek material 4 is: festened directly ο» tire nonwoven: web .1 where a régióit between fee neighbouring elastically stretchable film: strips 2 is bridged by die book imperial 4, Whereas the comparatively stiff hook, material: 4 fbt«s: the inelastic regions of fee composite material web, the elastic regions: of the composi te : material web adjoin botit sides of the hook materia:! 4, where both the nonwoyeB web ! on the first outer side: and (he imtrwoven material 3 on.the second eater'Side of she composite materia.!: web are stsete&amp;aMe, The elastic recovery is achieved hr tins case by tire eiipitically sfidtchable fiijn: strip 2. Optionally belore a usage jffer the first time, a stretching performed at least in sections írt tire «asperse direction is expedient In order l© achieve an privation, that is a slight stfetehabildy of (fie composite material Web m the elastic regions,, lytm With such an privation, the inelastic regions are fixed by themOinparetiVely rigid fiookfiteterial 4,

According to the invention, the hook material 4 has hdOk-fiee edges 5 Wlficfi: are Oscfi overiapped fey an edgsof tbs adjacent elastically stretchable film strips 2, The film strips 2 are % this cane suitably listened to the ferofe tree edges 5 so that die composite material w«b dobs not have a weak point; to tire section shown iá the transverse direction. Since the hook matériái d is intetted -iö Été web ásd an rivMsp with the film strip 2 is also provided on the book-free edges 5, an additional stiffening as known from the prior art is not required.

In the exemplary enfeedlment shown hot only the film strips 2 but also the nonwovefi material 3 and tire hook material 4 are supplied as strips which have an unchanged configuration along their longitudinal direction. In principle however, it Is riot excluded that the hook material 4 has hoek-íree regions in fee strip hmgitndmai direction according: n> fee dimensions of individual nappy elbsuxe elements, 1¾¾ fastening of die hook material 4 on the nmiwoveh Web 1 :« well as the fastening of ifie elasdoiifly sttetchablp film strips 2 on the non woven web I: as: Well as on the hook-free edges 5 can be áeéóthpiished ifi: various: ways, la particfifer, an extensive or secfiofial adhesive bonding can be accomplished by means of adhesive:fi or also ultrasound welding. In the case of :an adhesive bonding provided only in sections, the joining is expediently made by means of adhesive strips which extend along the longitudinai direction of tits sinp-shaped elements described. figure 2 shows rite mdividaal cdiiiponenix of the composite material web where a flat afiplibadott of adheslye f is shown; only as 3p exafapfe. Ifi the method fite madofiwturifig fits composite material web with elastic ami feelasric regions IbitMiy the nonwoven ·®Φ 1 is supplied, finbsespenily the hook material 4 which has hooks free edges 5 m supplied in strip form. The hook material 4 Is then festetted with a. fiat rear side apposite the hooks 1 oil fee noawovea web 1, i,e, adttesiveiy Ponded for example with the adhesive fe Sahserpently the elíKitfeálly'Sfegfefca^ieiSöa: strips 2 and noawoven strips of fee tnmwoven material 3 are then supplied in such a manner and fastened on the fionwoven web 1 Étaí the fife»: strips 2 ate disposed between the nouwoven wefe 1 and the noowovee .máknál 5 sad that the fo>ok~foee edges 5- of the hook material 4 are: at least partially overlapped by the edges of associated 'him strips 2 as well as noiiwovdn strips of the nofocovcn material 3. fa. this case,, ease should he takes to ensure that the film strips 2 am joined to the hook-free edges $ ifor which adhesive 6 is provided. in the exemplary embodiment shown.

Mike that stews in Fig. 2. the film strips 2 and the nenwpyen ipaterial 3 can already be laminated; to one: another before jetbihg to the nonwoven web 1 or to foe lmok; material 4 so foal strips of a: coo-espö»díng pre-laminate are then; supplied.

Figure 3 A relates to a pre&amp;rred footer development of the invention concept described with foe hook material 4 changed compared with Fig. Í, The lmok material 4 .shown la detail in Fig, 4 has hook-free edges $ "with a reduced thickness. Between the hook-free edges S, hooks 7 are located oh a central section of foe hook hanerial 4 which is designated as carrier section 8. The carrier section 8 must have a sufficient thickness ia order to he able to hoki the individual hooks .-7 securely and irt eider to achieve a sAáte teSsmag of the composite material wefo Cht foe other hand, foe hook-free edges: 5 have a reduced thickness compared with the carrier section 8 with the result that a considerable saving of material is already achieved. In addition, however, various advantages with regard to foe: geometry are also achieved. Thus, it can be direcily idenUfted that the hint strips 2 and the nonwoven material 3 are less severely deformed so that foe composite strength ta foe frattsvefoe direction can overall be improved. In addition, it can also be identified that the function of foe hooks 7 is not adversely affected by the film strips 2 and the nomvoven material 3 whilst in the embodiment according to Fig. 1 at least a certain adverse effect oil foe exterior hooks 7 cannot be eliminated. fot least in an otherwise the same configuration, there is al&amp;rgex· free length which is: available: for joining to a cosSplementary material Figures 3:B: and 3C show alternative enfooditnesfoi in which: the elpticahy sttetchsfeis bins strips 2 end laterally before ite hook material 4 so: that tite hook-free: edges $ are only Co veted fry die nonwoven strips öf the nenwoveii material 3. Within the framework of such an enfoodifoeah the rsonwövéti web 1 and foéfrphwöyeri material 3 must have a saSlcient sireiigdifo order to avoid tearing at?foe transition to the hook material 4. M an advantage however, a psrifoulafly fiat sfruetefe is obtained where the elastically stretchable film strips 2 ape nrriuiged eohfoleisly flat on the cominuotis hopwovea web 1. Whereas according to Fig .38 a hook materiitl 4 according to Fig. 1 is used. Fig. 3C .shows an embodiment in which the hook materia! 4 corresponds to die einhodiuicnt aceoriliug to Figi 3A. In foe erabodin-sent: tiCeoidhig to Fig. 30. in particular the thickness of fo«: hook-free edges 3 can be? adapted to the ShtektieSs of fop elastically stretchable film strips 2 so that there is only •a small step or no step at all at foe noiiwoven :strips of the nonwoven material 3.

Figures I to 3C merely show a section of the composite material web from which individual nappy closure efemeafe: cart: fee punched. The compos ite material web can be cut through is foe region of foe brsok nuiiörial 4 só that tbs put hook material 4 then lies on au outer end of the nappy closure element, fon foe opposite side foe nappy closure element is then fastened on a nappy body, for example is adhesively bonded or welded bv akrasetintl fos a result of foe adhesive bonding, a stabilisation and stfrfosfog of foe bappF closure element is accomplished at the end opposite the hook material 4.

Within foe framework of the invention it is fundamentally possible that the film strips 2 have the same width as the nönwovpp material 3 arranged thereon in foe form of nonwoven strips. However, it is also possible that foe felts sírfos 2 only extend over a pari of foe ootneovan material 3 so foat foen two film strips 2 are combined with a mtwmm strip -of-die mvwmm- material 3. ik corresponding eonfrguration is shown ia Fig. 4 A where the cutting lines 9 so form individual nappy closure elements (Fig. 4B) are shown. The nappy closure elements can he punched out on the composite material web. 1« principle, however a cuttixsg of she composite material web or a different reparation are also considered. Instead of straight cutting lines as shown in Fig. 48 for the sake of simplicity, a svavv cutting or punching can also lake place so that ends becoming narrower are then produced which each comprise the hook rtoterial with dtp Ifeolri breaks entire width.

Figure 4€ thus stows a possible cutting or punchiog pattern to produce individual closure elements 20. In the embodiment according to Fig. 4€, each closure element 20 comprises the region of the hook material 4 provided with hooks 7 over its entire width. In addition* a dee end of the closure element 20 next to the hooks 7 is formed; by a section of the opposite material web which comprises one of the two hsotóeo edges 5 of die took material 4. This gives the advantage Shat this section So be grasped by a user on a nappy or a comparable product is stiff and not stretchable tine to the hook-free edge 5 of the hook material % whereby a simple and comfortable handling is possible as a result of the omission of the hooks 7 and the surface iram the nonwoven ntaierial 3. .% a result of the cutting and pmiching pattern shown in Fig. 4C with iutenueshisg closure; elements 20 in the region of the book malmai 4. the; waste can be minimised.

Tbe hook-free edges 5 can be formed in various ways. For example, starting from a completely covered hook material, it can be provided that took» are separated at the edges m order to form the hook-free edges 5. Furthermore however, starting from a hook material completely covered by hooks, it is dm posable to fuse hooks by pressure and temperature and thus remove them. In this case, by means of a eoirespönding application of force, ito thickness of the hook-free edges 5 can also he reduced in order to arrive at a configuration according: so Fig. 5A. Depending on she requirements according to the intended application provided in each case, however it can also be advantageous if the hook-free edges 5 have an increased thickness compared with the carrier section 8 located underneath the hooks 7 (Fig, 58). The free length of the liooks 7 is certainly reduced but as a result of the reduced thickness of the carrier section 8, such a took material has an improved flexibility and is also less stiff during use. Depending on the eonfsgamtiosp as a result of She flexibility fop example it: is: also possible that the 'books 7 are pressed too: a textile loop material as eobtitejfnaierial due to a: deformation of die earner section 1

However, itotocasures described to produce the hook-free .edges ? are comparatively expensive Which is wiry it is preferable to produce the book-free edges 5 directly during the manufacture of ifc hook material 4.

Thus,: according to Fig. 6 it can be provided that in order to form the hook material 4, a: polymer melt 10 is fed front: a sloped nozzle 31 into the gap between a cooled roller 12 (chill-roll): and a band 13: guided In sections akfog the surface of the roller 12, where the roller 12 andfe tire band 13 have a stracturikg provided for the formation of hooks f, The stsmtmmg. can be provided ih the form of recesses or cavities or in particular with the feahd: 13: in the fenyőf a perforation. The selfeontained hand 1,3: malso designated as ssnooihing band or sleeve, The structuring to form hooks is substantially ptutcfoafo in order to: be able to form stems of the hooks 7, Directly during manufacture; with an arrangement according to Fig, 6, tobfc-free regions: can be feriped hy interrupting the structuring described, where the roller Ϊ2 or the bah# 13 there have a smooth surface.

In addition to a fito structuring to forts indivkhtal hooks '% prelections or grooves eatt nlstr be provided on tto: roller mid foe smtotltog band, which: extend over tt larger: region of the surface where the thickness of the roller gap can ttaehy fee set difSireufiy k «rtam regions. it the profile of such projections or grooves is adapted to the structuring to form the hooks 7, for example. hook-free regions having a reduced thiekSess can he produced. Thus, it is in pafosufar possible in fos regions which afo structured to form the hooks t to form carrier sections 8 underneafo the hooks 7 which have an increased thickness émtipafod with the book-free regions, A. hook material in strip form cart be produced using the method described, which is particularly suitable for the previously described composite material web, However, the hook material «a» also he provided for other application proposes. Figures 7A to 70 show as an example difiercoi configurations of the hook material 4 with hook-tree regions in plan view atfo In cross-section. In fig, 7A a stop-shaped hook materiális produced which has hook- free edges 5. Them is therefore art agreement with the hook material 4 according to Fig. 1, According to Fig, 7B, a plurality of regions provided with hooks f and feok-fiss regions can fee provided in the longitudinal direc tion of the hook material. figure 7£ shows that in addition, interruptions can also he provided in the longitudinal direction of the stripshaped hook material 4 where finally fig. TD shows a combination of regions with hooks 7 which: are continuous: In the ioiigitnilinai dheciiots. and interrupted in the longitudinal dtfoe tioS,

As explained previously, in addition to the structuring to tonn the hooks 7, protections as well as grooves or recesses: can also he: provided in the: roller 12 and the band 13 in order to vary she gap between the roller 12 and the band 13. in relation to the lmok material 4,. the sumcruring to form the hooks 7 comprises: a mierosiracturing whereas the projections and recesses deSennias She macroscopic structure of the hook material 4, in particular, die projections and recesses c;m fee matched is the structuring to form foo hifofcs 7.

Figures 8 A to SO show hook matériád 4 according (o Figs. 7A to 71) where however the hook-free regions have a: smalt thickness as carrier sections &amp; which are formed underneath the hooks 7.

If both the roller 12 and the band 13 are provided with a structuring to form hooks 7. a hook material 4 with hooks 7 can fee produced os both sides, This horde material 4 is then not provided for the profopusiy described composite material web hut can for example fee used as a connecting element. Figure 9A shows a hook element which is configured according to Fig. 7 hut has hooks 7 m its two sides. Figure $B cööesponds to tire eenitgnmron according to Fig. 78 where however hooks 1 are provided here on both sides, fefeturidly with the arrangement of hooks 7 on both sides of the hook máiénál 4, iroeirimtions cail also he provided in flte longitudinal direction (cf. Fig. ?C). Figures 9C to 9B show that the hooks 7 can he configured differently on both sides of dm Isook malerhd 4 where foe hooks 7 can have a dtltofout kriph. Forioerororfo the position and the extension of the regions provided with hooks 7 can also be difiereut.

The hook material 4 preforably consists of polyoleim, for exaropkti of polyethylene, polypropylene, eopolyrnem ofFi and PF or mixtures of tire said rnaterials. The hook: material can fee configured to fee single-layered where however the multilayer slrueiure, hr partfculgr a structure having up to five layers is possible. In a multilayer siruefeuv, fovfcmhiy at least one layer consists of a polyolefin, in a multilayer straetme It is alto possible to provide an interior layer or, with foe arrangement of hooks 7 m only one side of foe hook material 4. an outer layer opposite the hooks T with an mereased strength to make foe tnafotiai as stable as possible. Specifically when such a layer extends into the hook-free regions, a high, slabiity can be achieved with a very small thickness.