FR2692602A1 - Non-woven fabric as well as the method and the device for manufacturing the same. - Google Patents

Abstract

Bulky nonwoven fabric with fibers arranged meandering between the surfaces of the web in which the fibers of a longitudinally oriented web are transformed between the two surfaces of the web, in a manner known per se, into a web of fibers meandering (11) and that the vertices (112, 113) of the meandering arcs (111) close to each other of the two surfaces of the web are connected together by loops of fibers from the fibers of the vertices and that the fiber loops (112. 113) are oriented transversely to the meander arcs (111), close to and roughly parallel to the two surfaces.

Description

The invention relates to a bulky nonwoven fabric with fibers.

  arranged in meanders between the surfaces of

  the tablecloth which is consolidated on both sides.

  The invention relates to a method and a device for manufacturing the nonwoven fabric. Non-woven processes and fabrics of the type mentioned in

  introduction are now known in different forms.

  The reinforcement of layers of fibers is carried out, in practice, mainly by the needling thus named of the layers of the bulky layer In this case, using a

  large number of felt needles so named, many

  its fibers are oriented through the web and are there

  laced, with the fibers of the tablecloth, irregularly.

  To obtain a smooth surface on both sides, needling is carried out simultaneously on both sides or

  one after the other The number of bites per unit of sur-

  face determines the density and regularity of the surface.

  If the surface is to be smooth, a large number must be provided.

  number of bites per unit area As a result, the water table

  fiber is made quite stable, but it is also

  very tight and dense over the entire cross section.

  However, for padding and for filtering and insulation purposes, it is appropriate to provide the interior of the nonwoven fabric with a very low density.

  and realize the outer layer in a stable and smooth manner.

  For this purpose, up to now, pre-needled plies of different densities have been added by the process of

spray rolling.

  These layers in layers, thus produced, do not have

  that a weak elasticity transversely to their surface.

  The application of binders makes them relatively rigid and

  they are not usable in many applications.

  If each of the layers is linked by needling, the looser inner layer is then also automatically densified and the nonwoven fabric has essentially the same undesired properties as a thick needled sheet.

on both sides.

  Due to their high density, such nonwoven fabrics require a great deal of material, they are heavy and stiff and cannot be used, for example, as sub-fabrics for filling the cushions of motor vehicles and also as bodywork with formable surfaces for sound insulation.

  This is why in the past, for such utlisa-

  we added mesh tablecloths to the back of

  the patterned top fabric which is of high quality value

  tive and often has a fluffy surface.

  Because of their

  low cross-section, only an insufficient cushioning effect

  For this reason, a layer of cellular material has again been added under the mesh tablecloth or as a replacement for it. On the back of the latter, to guarantee sufficient sliding capacity, it has had to add, using a binder, a lattice of coarse mesh. By this configuration, the fabric of the cushions becomes very expensive once it has the parameters

  necessary quality In addition, the cellular material used

  is not recyclable For other applications, non-woven pile fabrics are known and distributed on the market.

  market under the name of Voltex or Kunit.

  In the case of Voltex, it is a non-woven fabric, the fibers of which are drawn, using sliding needles, through a base layer and are assembled,

  on the right side of the fabric, in a fiber mesh connection.

  On the back of the fabric, there remains a thick layer of hairs to

  from the non-meshed parts of the tablecloth After removing it

  tion by brushing the flying parts of the sheet, this layer of hairs can be stabilized in a voluminous state by spraying and fixing operations. This surface thus created is however neither suitable nor as a surface.

  slip to garnish cushions, nor as a sur-

  face of application for a fabric of wear-resistant and shapeable top In the technique designated as "Kunit" (DD 258 829 and 282 585), one advances, meanders, a

  main orientation multi-layered fiber web

  longitudinal, which is consolidated by the formation of fiber meshes, on one side by meshing the arcs of

  meanders, through a base layer or in knit weave.

  Such nonwoven fabrics consolidated on one side do not

  can only be used in a very limited way.

  The removal of the flying elements from the web by brushing and the return to the process on the knitting machine

  tablecloths are not possible with the desired effect because the fi-

  re-introduced berries have lost their longitudinal orientation,

  which can only be found through a carding process.

  EP-A-0 350 627 discloses a device for manufacturing a bulky layer of fibers, according to which a sheet of fibers with an essentially longitudinal orientation is densified in meanders by a folding element and is brought under this form at an installation at

hot air for fixing.

  With this device, one certainly obtains an elastic fabric having a low density; but this fabric is not at all suitable in this form for padding applications The surfaces are not

  slippery and consolidated To obtain these properties

  tees, additional stable surface formations must be applied Here the disadvantages arise

  described at the beginning The advantages obtained in terms of elasticity

  cited are once again reduced to nothing Thus, the use of such products is limited to the areas where one could employ

also loose tablecloths.

  The object of the invention is to create a nonwoven fabric of the type mentioned in the introduction which presents, for expenses

  lower in manufacturing, a transverse elasticity

  sufficiently high soil which allows a use of low material which can be sent without problem to recovery. The objective of the invention resides in the fact of creating a nonwoven fabric, as well as of proposing a method and a device for its manufacture. The nonwoven fabric must be provided on both sides, avoiding adhesive materials and / or addition processes oriented transversely to the

  surface of nonwoven fabric, stable and slippery surfaces

  health, while the internal areas of the cross-section of the web must also present, in the finished product, mainly transverse fibers in a bond

  loose The density and thickness of the elastic middle layer

  that loose materials must be variable The use of threads for the nonwoven fabric must be excluded or reduced to a

strict minimum.

  According to the invention, the nonwoven fabric

  miner having fibers arranged meandering between the surfaces of the tablecloth which are consolidated on both sides is

  characterized in that the fibers of a long oriented web

  tudinally are transformed between the two surfaces of the sheet, in a manner known per se, into a sheet of meandering fibers and that the vertices of the meander arcs close to each other of the two surfaces of the sheet are connected together by fiber loops from the fibers of

  vertices and that the fiber loops are oriented transversely

  salty with meandering arcs, near and roughly parallel to the two surfaces The fibers of this consolidated sheet are mainly oriented transversely to the base surface of the sheet and simultaneously also form the stable and slippery surfaces of the sheet The most compact high of the surfaces of the sheet for a high elasticity of the internal layers of the sheet is obtained by a densification of the surfaces using fiber meshes because the fiber loops of the meander arcs are

  linked together by forming meshes.

  Also by needling the surfaces of the ply parallel or at an acute angle with respect to the surface of the ply, a high stability of the surface is obtained without losing the elasticity transverse to the base surface. The transverse compactness is improved when

  additional surface functions are added to the

  sides of the nonwoven fabric by loops of fibers As a surface formation, a thin spun web, chemically consolidated, a lattice structure or any other textile surface formation with a flat and coarse structure can be used. use scrambled or spun tablecloths, since costly wire formation can be avoided and the surfaces can be produced at a lower cost

and high productivity.

  For the production of molded, light, high-

  stable, the nonwoven fabric according to the invention can be subjected to deep drawing, be impregnated, in

  the area of the dense layers of the surface, of a plas-

  tick and be hardened in a mold so this stuff is

  also suitable for the production of body parts

  serie The process for the manufacture of a nonwoven fabric according to the invention, o a layer of layers with a mainly longitudinal orientation is fed continuously and in

  defined position, where the layered sheet is directed in mean-

  dres by at least one folding element movable transversely in the direction of advance and where the meandering ply is consolidated by mutual interlacing of fibers, is defined by the fact that the fibers of the tops of a first surface of the ply in meanders are fixed parallel to the meander arcs by oscillating elements transversely to the surface, that the fibers of the vertices fixed from the first surface are intertwined with the fibers of at least one of the vertices in close proximity forming a surface and that in a next step, the fibers of the opposite vertices are fixed and

  intertwined together to form a surface.

  The essence of this process consists in the fact that the consolidation of the two surfaces of the meandering sheet is carried out in two working steps separated from each other in space and in time The magnitude of the separation spatial and temporal here has practically no importance The modified process resides in the fact that the fixing of the tops and the interlacing of the fibers of the tops is carried out using a sliding needle bar and that, for this purpose , at the two surfaces of the meandering sheet, one after the other, the sliding needles pull, from the tops of the meandering arcs, fiber loops, that these bars apply the fiber loops to the heel of the needles slippery and that they knock them down on a felling edge above each loop of fibers pulled in succession This modified process allows the meeting of several working steps The common action of the continuous rotating cylinder with the glissan needles tesà periodic oscillation, simultaneously allows the meandering of the advanced web, the fixing of a vertex and the connection of two neighboring vertices by meshes of fibers intertwined with each other Which is decisive for the loose internal structure of the non woven is that the web is neither densified nor by the tip of the needle of the second station of the formation of

  or the slip sliding on the heel of the needle.

  For this purpose, the inclusion by form adhesion of this mesh against the felling edge of the second mesh forming station and the guide, driven by adhesion, of the first consolidated surface of the nonwoven fabric are of decisive importance. Bringing a sheet of fibers with a mainly transverse orientation to at least one of the mesh forming stations between the tops of the meander arcs and the felling plan improves, on the one hand, the efficiency of the means inclusion and further increases the

  compactness of the nonwoven fabric in the transverse direction.

  The fabric thus produced is very well suited for deep drawing operations, without, however,

  lose its structure produced in accordance with the invention.

  It is also possible, as has already been said,

  to use such non-woven fabrics as supporting structures

  tores for body parts By virtue of the high density in the area of the nonwoven fabric surfaces, the inner layer can, under certain conditions, be kept away from the plastic material. For a low mass, a high compactness is obtained The damping properties of these body parts are very good We can, in

  in certain circumstances, do without additional insulating mats

  mental. A second variant in the principle of the process is

  defined in that the layered fabric, longitu-

  dinal is deposited in meanders using a pair of cylinders

  oscillating transport dres, that it is fixed and densified using oscillating clamps in a guide channel, that the meandering ply is guided in a guide channel in the form of curves in two opposite directions one after the other and that its meandering arcs are connected, in the area of each outer curve, at an acute angle with respect to the surface of the meandering fabric, in the stitching area, by

  groups of felt needles with counter

  supports and pigs that can be inserted In this process, the tops of the meander arcs are densified by felt needles which, parallel and / or at right angles to the surface of the sheet, push and intertwine one or more fibers through the vertices of neighboring meandering arcs This process is above all usable when it is not required a high sliding capacity Also in this process, the core of the non-woven fabric remains loose and retains its high elasticity This process is thus particu - particularly suitable for acoustic insulation mats or

  for carpets in motor vehicles.

  The device for manufacturing the nonwoven fabric essentially consists of a knitting machine on a warp loom which has been modified into a tablecloth knitting machine. At the usual stitch forming station on this machine, a station which has at least one row of sliding needles and felling plates, there is associated a second mesh forming station, where the free arcs of the meanders of the second surface of the meandering web are meshed The second mesh forming station is, in in addition, provided with means which allow guidance with exact positioning of the meandering sheet against

  the surface of the tablecloth already consolidated.

  To ensure the inclusion function during the mail-

  lage of the two surfaces of the tablecloth, the elements of inclusion have a decisive importance and form part of the device which

  is defined by the fact that at least one of the training zones

  a mesh comb is allocated, oscillating transversely to the plane of the sliding needles and its inclusion elements oriented, close to and parallel to the felling edge By modifying the distance of the inclusion on the felling edge, on the one hand, and in guiding the first consolidated surface,

  on the other hand, the thickness of the web should be adjustable.

  Instead of a separate inclusion element, the felling comb can also be provided with a known inclusion hook. In this case, the felling bar must be provided with a

  oscillating movement transverse to the needle plane.

  The introduction of a tablecloth with an essentially transverse orientation

  dirty in the slaughter plan promotes the inclusion function.

  For cases where there is no available knitting machine on warp loom with a second stitch formation station, it is also possible to bring the consolidated surface formation on one side to a second machine.

  knit on warp loom including the mail training area-

  has been modified by means of guiding the web and inclusion means The knitting machine on the loom

  chain can also be fitted, instead of sliding needles

  health, felt needles Depending on the working method of these needles, the web guide must however be placed in front of these needles parallel or at an acute angle to them As counter-supports, it is possible to

  use modified inclusion combs with their heads

nements.

  Various other features of the invention

  moreover emerge from the detailed description which follows.

  Embodiments of the subject of the invention are shown, by way of nonlimiting examples, in

attached drawings.

  Figure 1 shows a consolidated nonwoven fabric

  with surfaces consolidated by the mesh of the tablecloth.

  Figure 2 shows a consolidated nonwoven fabric

  with needled tablecloth surfaces.

  Figure 3 shows a consolidated nonwoven fabric, where the surfaces are bonded with a surface textile formation. Figure 4 is a schematic representation for the manufacture of a consolidated sheet according to Figure 1, with mesh forming stations arranged at a distance

one another.

  FIG. 5 is a device for the manufacture of a nonwoven fabric according to FIG. 1 with mesh forming stations close to one another, the fixing of the already consolidated face of the web, in the area of second mesh training station, is carried out, via the inclusion elements, at the level of the

  first mesh training station.

  FIG. 6 is a device for manufacturing a consolidated sheet, where the second mesh forming station is arranged in the direction of withdrawal downstream of the

  first mesh training station.

  Figure 7 is an arrangement according to Figure 6, where the first mesh forming station is equipped

  vertically movable sliding needles.

  FIG. 8 is a schematic representation of the device for manufacturing a consolidated sheet according to the

figure 2.

  Figure 9 is a device according to Figure 8 implemented on knitting machines on the warp loom with horizontal needle bars and inclusion means

  or vertically movable counter supports.

  A tablecloth from a carding machine is layered by the assembly of several tablecloths or by a zigzag laying along the direction of transport and is, as a rule, densified in this form by cylinders so as to be suitable for further processing Its fibers are mainly oriented longitudinally, without excluding the presence of fibers oriented transversely The average stacked lengths of this sheet are of the order of to 70 mm It is also appropriate to introduce

longer fibers.

  This sheet is first of all placed in layers in the form of meanders. The arcs of the meanders have a length somewhat greater than the thickness of the nonwoven fabric to be manufactured. The sheet thus obtained is designated

  like the meandering tablecloth 11 In order to consolidate

  tion of the surfaces of the meandering ply 11, the vertices 112 and 113 of the laterally adjacent arcs are

linked together.

  il In the variant shown in Figure 1, this connection is made by fiber meshes 12, 12 '

  from the fibers of the tops of the meandering arches.

  In FIG. 2, this connection is made by fibers 13, which are gripped in a meandering arc, are pushed through the vertices 112, 113 of several meandering arcs and are intertwined therebetween by repeated stitching

felt needles.

  The nonwoven fabric represented in FIG. 3 shows a shape in which the summits 112, 113 are bonded by forming prefabricated surfaces 151, 152 The latter is applied to the meandering ply 11, of

preferably by means of binders.

  If fibers or other components with a low melting point are used, the connection between the vertices and the formation of

  additional surfaces by heating.

  In FIG. 4, the meandering of the ply 1 is carried out by a continuously rotating cylinder 25 having a toothed surface in connection with a bar of sliding needles 21, 211 with oscillating drive and arranged tangentially to the latter. row of sliding needles 21 grasps, with its hooks, the ply 1 downstream of the cylinder 25, pulls it horizontally up to the

slaughter position.

  Meanwhile, the cylinder 25 continues to carry

  ter ply 1 and present the length for the meandering arc

111 next.

  The sliding needles 21 catch the end of this length at the next exit and pull it again

  up to felling edge 232 In this way, without using

  tion of additional folders, which would require additional training, this allows removal of the

  meandering tablecloth that meets the requirements.

  This device known per se from the patent

  DD 258 829 works with great reliability.

  The row of sliding needles 21 forms, in common action with the closing metal wire 22 and the fixed felling 23, the basic principle so that the fibers seized by the sliding needles 21 are assembled, by felling, by assembly and by inclusion of the loops of fibers, in a connection from the stitches of the lap parallel to the

felling edge.

  The meandering ply 11 is already densified and linked on one side by the meshes of fibers 12 intertwined with one another. It is brought in this form, directly or via intermediate storage to a second station.

mesh formation 3.

  This second mesh forming station 3 has, at a defined distance in front of the felling edge 332, a guide

  36 for the already consolidated face of the meandering ply 11.

  The meandering ply 11 is held on this guide 36 by adhesion of its consolidated face. This is ensured by the force resulting from the advance and withdrawal tension of the

meandering tablecloth 11.

  It is appropriate, to bring this tablecloth in meanders 11

  consolidated on one side, close to this guide and parallel

  to the needle plan and deflect it in the direction

  of withdrawal in the needle plan.

  The sliding needle 21 which has entered the unconsolidated side of the meandering ply 11, at the return stroke and during the extraction of a loop of fibers from this ply

  meandering 11, cannot be lifted by guide 36.

  The sliding needle 31 picks this loop together with the

  felling edge 332 towards the rear.

  At the next exit from the needle, this loop is mounted on the heel of the sliding needle 31, and is then flared there again To prevent that during this operation the meandering web is compressed by this mesh to be mounted on the heel , an inclusion comb 34 provided with needle-shaped inclusion elements is moved parallel to the felling edge 332 in the needle spacings as far as the needle plane. In this way, the mesh connection is securely held against the felling edge and the loose structure of the web is not changed The process of fiber mesh formation

  is accomplished in the usual known manner.

  To increase the compactness of the meandering ply 11 in the transverse direction, it is possible to introduce, between the felling plane and the meandering ply

  11, a ply 14 with a mainly transverse orientation.

  Advantageously, this ply 14 is brought separately between the felling edge 332 and the inclusion comb 24 But it is also possible, to deposit such a ply 14, which can be very fine, on the meandered ply, not tied and move them together

  to the mesh training station 3.

  The fibers of this ply 14 with transverse orientation

  dirty support the inclusion operation, in the fact that,

  where the inclusion plates intervene, they replace

  one hundred missing meshes formed by the plate.

  Figures 5, 6 and 7 show various arrangements of the second stitch formation station 3 on a knitting machine on the warp loom, which is already provided with a

  formation of meshes 2 or 3 Figure 5 shows a variation

  te, o the fixing of the first consolidated face of the web is ensured at the first mesh forming station 2 by

the inclusion comb 24.

  Therefore, the second mesh forming station 3 is arranged very close below the first

mesh formation 2.

  Due to the lack of space for an inclu-

  additional sion 24, the felling plate 23 of the second mesh forming station 3 has an inclusion hook common on knitting machines on the loom

  chain and is movable vertically by oscillation.

  FIG. 6 shows a device, where the already consolidated face of the meandering ply 11 is fixed in position by adhesion while being oriented towards the rear. For this purpose, guide plates 36 are arranged at the bottom against the felling bar. 231 The sliding needles 31 of the second

  mesh forming station 3 are provided, perpendicular to

  under these plates 36, hooks directed towards the front and points directed upwards The remaining working elements of the second mesh forming station 3 are, for

  compared to that, arranged in the usual way and function-

as described above.

  In FIG. 7, the knitting station already existing on the warp knitting machine is

  used as second mesh training station 3.

  A first mesh training station 2 is arranged here

  in front of it and is fitted with 21 oscil- sliding needles

  lantes perpendicularly and elements of formation of

  mesh, elements oriented accordingly In this case, the

  existing specification of the web for fiber webs 14

  with transverse orientation can be used for stabilization

  reading of the second face of the meandering sheet 11.

  Another device is shown in Figures 8 and 9. These two devices are identical in principle They each have a

  oscillating folder 4 and a pair of transport rollers 42 Two oscillating clamps 43, 44 ensure the meandering of the web 1 in a guide channel 45 and assist its transport step by step in this guide channel

45.

  The guide channel 45 is curved at an obtuse angle at close locations in opposite directions. In this way, the felt needles 51, 61, also called Veltin needles, can, before and after the curve, penetrate in an acute angle into the surface. of the meandering ply 11 and move there parallel to the surface of the meandering ply. Via the felt needles 51, 61, several fibers 13 are directed through the vertices 112,

  113 of the meandering arches and are intertwined together.

  In the rhythm of the movements of the needles, counter-supports 52, 62 can be introduced, oscillating transversely thereto, as counter-stops At the return stroke of the felt needles 51, 61, the fibers 13 are scraped by the walls of the guide channel in the scraping zone 531 The arrangement, according to FIG. 9, is selected when it is desired to use the horizontal position of the needle bar and their driving on machines with knitting on a warp loom, in particular Malimo knitting machines, for guiding and training

felt needles 51.

  In all cases, the consolidated nonwoven fabric is removed and brought to a not shown spool or a carpet.

  rolling for intermediate zigzag storage of the water table.

Claims (18)

  1 Bulky nonwoven fabric with fibers arranged meandering between the surfaces of the sheet which are consolidated on both sides, characterized in that the fibers of a longitudinally oriented sheet (1) are transformed between the two surfaces the web, in a manner known per se, in a web of meandering fibers (11) and that the vertices (112, 113) of the meander arcs (111) close to each other of the two surfaces of the web are connected between them by loops of fibers from the fibers of the tops and that the loops of fibers (112, 113) are oriented transversely to the meander arcs (111),   near and roughly parallel to the two surfaces.   2 nonwoven fabric according to claim 1, characterized in that the fiber loops (112, 113) of the meander arcs (111) are interconnected in the form of mesh.   3 nonwoven fabric according to claims 1 or 2,   characterized in that it is applied to the surfaces of the meandering ply (11) formed by the tops (112, 113) of the   meander arches (111), a prefabricated surface formation   (151, 152) which is held in place by fiber loops   at the tops (112, 113) of the meandering sheet (11).   4 nonwoven fabric according to claims 1 to 3,   characterized in that the fiber loops pass through the formation of prefabricated surfaces (151, 152) and are intertwined in the form of a mesh outside the formation surface (151, 152).   Nonwoven fabric according to claims 1 to 4,   characterized in that the formation of surfaces (151, 152)   has fibers that have a low melting point.   6 nonwoven fabric according to claims 1 to 5,   characterized in that the surface formation (151, 152) has a lattice structure (151) and consists of recyclable materials.   7 nonwoven fabric according to claims 1 to 6,   characterized in that the formation of surfaces (151, 152)   is a consolidated thin scrambled web (152).   8 nonwoven fabric according to claims 1 to 7,   characterized in that the surface formation is a sheet spun (152) preconsolidated.   9 Nonwoven fabric according to claims 1 to 8,   characterized in that excess length fibers are assigned to the essentially oriented web (1) longitudinal.   Nonwoven fabric according to claims 1 to 9,   characterized in that at least one of the consolidated surface layers is impregnated with plastic and is hardened in a mold.   11 Process for manufacturing a non-woven fabric   woven according to claims 1 to 10, o a sheet of   layers (1) with a mainly longitudinal orientation is fed continuously and in a defined position, where the layer of layers (1) is directed in meanders by at least one folding element (4, 41, 42, 21) movable transversely in the direction of the feed and o the meandering ply is consolidated by the mutual interlacing of fibers, characterized in that the fibers of the apices of a first surface of the meandering ply are fixed parallel to the meandering arcs, by elements oscillating transversely on the surface, that the fibers of the fixed vertices (112) of the first surface are interlaced with the fibers of at least one vertex (112) in the immediate vicinity, forming a surface, and that in a next step, the fibers of the vertices opposites (113) are fixed and intertwined together to form a surface.   12 Method according to claim 11, characterized in that the fixing of the tops and the interlacing of the fibers of the tops is carried out using a sliding needle bar and that, for this purpose, at the two surfaces of the sheet in meanders, one after the other, the sliding needles pull, from the tops of the meander arcs, fiber loops, that these needles apply the fiber loops to the heel of the sliding needles and that they knock them down on a felling edge above each   fiber loop drawn afterwards.   13 Method according to claims 11 and 12,   characterized in that the layered ply (1) with longitudinal orientation is continuously supplied by a cylinder (25) with armature, that the ply (1) is gripped, from a generator of this cylinder (25), at means of hooks of a row of sliding needles (21) of a first area of mesh formation (2), this row being movable in an oscillating manner tangentially to the cylinder (25), that it is pulled in the opposite direction of rotation of the cylinder (25), that it is picked at a felling edge (232) and that it becomes a formation of fiber meshes (12), and that with a view to the formation of fiber meshes, the vertices (113) of the free meander arcs (111) on the second surface of the meandering ply are brought to a second mesh forming zone (3) having sliding needles (31) and a felling bar (331 ), near, in front of and parallel to the felling edge (332) on the face hook.   14 Method according to claim 13, characterized in that the connection from the mesh fibers (12) can be fixed more on the two surfaces of the meandering ply (11), near and in front of the felling edge (232 , 332) and parallel to it, by elements of inclusion   (24, 34) adherents by shape, movable in an oscil- lante.   Process according to claims 11 to 14, character-   laughed in that a sheet (14) with an orientation which is also transverse   dirty is brought against at least one of the mesh forming stations (2, 3) between the vertices (112, 113) of the meandering ply (11) and the respective felling edges (232, 332).   16 Process for the production of a non-woven fabric   Seed according to one of Claims 1 to 10, characterized in that   that the longitudinally oriented layered fabric (1) is meandered using a pair of oscillating transport cylinders (42), that it is fixed and densified using oscillating clamps (43, 44) in a guide channel, that the meander ply (11) is guided in a guide channel in the form of curves in two opposite directions one after the other and its meander arcs (111) are connected, in the area of each outer curve, at an acute angle with respect to the surface of the meandering fabric (11), in the stitching area, by groups of felt needles (51, 61) having counter supports ( 52, 62) and   pigs (531, 631) that can be introduced.   17 Device for manufacturing a non-woven fabric   woven according to claims 1 to 10 according to a process   according to claims 11 to 16, characterized in that,   on a knitting machine on a warp loom having at least a first stitch forming station (2) which consists of a sliding needle bar (211), a felling bar (23, 231) and at least one feed from the   tablecloth, a folder for a layered tablecloth is arranged above   above the first zone of formation of the meshes, that in the direction of passage of the fabric, a second zone of formation   mesh (3) is placed after the first training zone   tion of stitches (2), second zone whose needles sliding   tes (31) are directed towards the unconsolidated surface of the meandering ply (11) and which has a guide bar (361) with plates (36) for the first consolidated face of the meandering ply (11) , bar the guide surface of which above the needle plane is oriented parallel to it and, in the needle plane, is directed into the withdrawal direction.   18 Device according to claim 17, characterized in that at least one of the mesh forming zones (2, 3) is assigned an inclusion comb (24, 34) oscillating transversely to the plane of the sliding needles (21 , 31), the inclusion elements of which are oriented near the   felling edge (232, 332) and parallel to it.   19 Device according to claims 17 and 18,   characterized in that the slaughter plates (23, 33)   have an inclusion hook and are movable perpendicular   cularily at the plane of the sliding needles (21, 31).   Device according to claims 17 to 19,   characterized in that between the meandering ply (11) and the felling edge (232, 332), a ply supply is provided for a ply (14) with essentially orientation transverse.   21 Device according to claims 17 to 20,   characterized in that the second training station for mail-   the (3) is associated with a second knitting machine on chain business.   22 Device according to claim 17, characterized in that the knitting machine on the warp loom is provided   felt needles (51, 61) in place of the sliding needles   health (21, 31), that the guide (45) of the web forms in front of the felt needles (51, 61) an acute angle relative to the longitudinal axis of the felt needles (51, 61) and that the counter -supports (52, 62) can be introduced into the sheet in   meanders (11) transversely oscillating.