Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/10—Open-work fabrics
  • D04B21/12—Open-work fabrics characterised by thread material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
  • B32B5/026—Knitted fabric
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
  • B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
  • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
  • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
  • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/02—2 layers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2250/00—Layers arrangement
  • B32B2250/20—All layers being fibrous or filamentary
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
  • B32B2262/02—Synthetic macromolecular fibres
  • B32B2262/0276—Polyester fibres
  • B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/724—Permeability to gases, adsorption
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2601/00—Upholstery
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
  • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2403/00—Details of fabric structure established in the fabric forming process
  • D10B2403/02—Cross-sectional features
  • D10B2403/021—Lofty fabric with equidistantly spaced front and back plies, e.g. spacer fabrics
  • D10B2403/0213—Lofty fabric with equidistantly spaced front and back plies, e.g. spacer fabrics with apertures, e.g. with one or more mesh fabric plies
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2403/00—Details of fabric structure established in the fabric forming process
  • D10B2403/02—Cross-sectional features
  • D10B2403/024—Fabric incorporating additional compounds
  • D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2505/00—Industrial
  • D10B2505/08—Upholstery, mattresses
• • 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
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
  • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
  • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

Definitions

• the invention relates to a spacer fabric having a first and a second planar knitted fabric, which are interconnected by knitted spacer threads, wherein the first knitted fabric stitch-forming mesh threads of thermoplastic material and not mesh-forming additional threads of thermoplastic material.
• the invention further relates to a method for producing the spacer knitted fabric.
• Spacer knitted fabrics are characterized by a lightweight, air-permeable construction, wherein spacer knitted fabrics are elastic in the direction of their thickness due to the spacer threads extending between the two knitted fabric layers. Because of these properties, spacer fabrics can be provided as soft, elastic, and air-permeable layers in mattresses, upholstery, garments, or shoes. Spacer knit fabrics are also used in the automotive sector, for example for air-conditioned seats and seat covers, wherein spacer knitted fabrics allow a good contour fit due to their cushioning properties and the very good return behavior.
• a conventional spacer knitted fabric is known from DE 90 16 062 U1.
• spacer fabrics are not limited to the areas of ventilation and / or elastic support.
• spacer fabrics for railway sleepers for connecting a concrete body to a sleeper sole
• spacer knitted fabric is embedded in the manufacture of the threshold body partly in the concrete body and in the Schwellensohle and thus allows a particularly reliable, permanent connection of these two elements.
• spacer fabrics have a relatively open, airy structure with simultaneously high mechanical stability.
• a spacer knitted fabric with channels between the knitted layers is known from DE 10 2008 020 287 C5.
• the spacer knitted fabric in the layer formed by spacer threads between the fabric layers on crossing, obliquely to the direction of production channels.
• the well-known spacer knitted fabric has proven itself in practice and makes use of the fact that an excessive reduction of the stability is avoided by the oblique arrangement of the channels.
• a spacer knitted fabric is known from EP 1 775 362 A1, in which channels running in a production direction are formed in that part of the spacer threads is omitted in the knitting process with a multiplicity of threads guided parallel to one another, so that these defects extend in the direction of production open channels result.
• the strength of the spacer knitted fabric is greatly reduced at these production-directional channels, because the knitted fabric is there without stabilization, and the adjacent areas can only contribute to a limited capacity.
• the transverse direction occurs through the channels a very significant weakening, because the running in the direction of production channels completely collapse at a pressure in the transverse direction by the mobility of the two fabric layers or in a train in the transverse direction considerably in
• the width can be pulled. Both the function of the spacer knit and the handling during processing are significantly affected. Comparable restrictions apply when the spacer fabric has transversely extending channels, which can be produced, for example, that the spacer threads are guided on spaced rows of stitches in one of the knitted fabric layers in the production direction and there is no connection between the two fabric layers to form a channel.
• longitudinal and transverse channels for forming joints can be provided in the spacer fabrics known from the prior art in order, for example, to allow the spacer knit to be bent over for the purpose of contour adaptation. However, the channel is then compressed and is no longer available for fluid transport.
• an additional layer is provided between the two fabric layers, which extends over only a part of the distance between the fabric layers and thus enables a two-stage elastic behavior.
• the spacer knitted fabric can be weakened to some extent by the formation of channels. It is also disadvantageous that the known spacer fabrics have a certain extensibility even without channels between the fabric layers in the plane-that is, generally both in the production direction and in the transverse direction. When cutting, the elongation must be taken into account accordingly. In addition, when cutting the distance knitted fabric also partially short loops are separated, which then detach from the blank and pollute the environment. Thus, if a blank of the knitted fabric only takes place at an end customer immediately before further processing, the described contamination must be accepted there.
• the present invention has for its object to reduce the disadvantages described.
• a spacer knitted fabric is to be specified, which can be handled more easily during further processing and in particular also has a reduced extensibility in the longitudinal and transverse directions.
• a method for producing the spacer knitted fabric should also be specified.
• the invention and the solution of the problem are a spacer fabric according to claim 1 and a method for producing a spacer knitted fabric according to claim 11.
• the invention provides that in the first knitted fabric only the additional yarns are at least partially melted and cause by the at least partially melting a stiffening of the first knitted fabric.
• the present invention relates to a spacer knitted fabric, in which the additional threads are first melted and then solidified again by cooling.
• the melting leads to a clearly recognizable structural change of the additional threads.
• the melting and subsequent solidification can be recognized, in particular, by an uneven structure. If, according to a preferred embodiment of the invention, the additional threads are formed from a multifilament yarn having a plurality of filaments, the filaments are at least partially fused together.
• the spacer knitted fabric can also be heated to such an extent - by mistake or deliberately - that the additional threads then become molten and largely or completely lose their structure.
• the material of the additional threads is then distributed in the manner of a introduced into the first knitted fabric in the form of threads hot melt adhesive.
• the degree of stiffening can be accurately adjusted.
• the spacer knit is stabilized in the plane, however, the material is not too hard at the same time, which even with a deformation of the spacer knit occurring noise, such as crackling can be prevented or at least largely prevented.
• the stitch threads are not melted themselves, but are glued together by the at least partially melted additional threads.
• the structure of the stitch threads is then retained per se, although a certain fixation takes place through the molten additional threads.
• the melted additional threads can contribute to a fixation both by a cohesive connection and a certain form fit.
• the stiffening may additionally or alternatively be attributed to the fact that the additional threads are formed from a multi-filament yarn having a plurality of filaments, the filaments being at least partially fused together.
• the mesh threads are formed of multi-filament yarn, so that then on the one hand results in a relatively soft structure, on the other hand, the thermoplastic material of the molten additional threads can penetrate to some extent between the filaments of the mesh threads not melted itself.
• a controlled stiffening of the first knitted fabric can be achieved by the controlled melting of only the additional yarns and, if appropriate, also the second fabric fabric layer.
• a further advantage is the fact that no or at least fewer fragments are released when the spacer knit is cut by the additional fixing due to the at least partially melted additional threads. Pollution of the environment when cutting is thus avoided or at least significantly reduced, but also the first fabric layer still retains a relatively soft character.
• the second knitted fabric also comprises stitch-forming stitch threads of thermoplastic material and non-stitch-forming additional threads of thermoplastic material, wherein in the second knitted fabric only the additional threads are at least partially melted and at least partially melted cause a stiffening of the second knitted fabric.
• the additional threads in the first and optionally also in the second knitted layer can be incorporated as partial weft.
• a partial weft is referred to as a thread which, in the knitting process, is guided in the transverse direction over a plurality of needles, without itself forming stitches.
• Such a partial shot thus runs in plan view in a zig-zag shape in the production direction.
• the additional threads can also be incorporated as a full shot, so that they then run in the individual courses exactly perpendicular to the direction of production.
• the additional threads can also be incorporated as standing threads running essentially straight in the direction of production or else as lining threads, wherein in principle also different embodiments of additional threads in a knitted fabric can be combined, for example to form a kind of lattice.
• the additional threads can be formed from a first thermoplastic polymer and the stitch threads from a second thermoplastic polymer, wherein the first thermoplastic polymer has a lower melting or softening temperature as the second thermoplastic polymer.
• thermoplastics it should be noted that often the melting or softening temperature can not be specified precisely because there is no clear phase transition. At least the described temperature difference manifests itself in that, at a suitable temperature, the at least partial melting of the additional threads causes a perceptible structural change, while the stitch threads have no or no noticeable noticeable structural change. Only a conventional equipment of the material, in which the stitch threads are not melted, but fixed only in their form under the reduction of restoring properties is not understood as a structural change in the invention.
• the additional threads radiated energy for example in the form of infrared or microwave radiation, absorb stronger, so that specifically only the additional threads are strongly warmed up.
• the additional threads can also have an absorption-enhancing radiation-enhancing admixture. When heating by means of infrared, for example, even a dark coloration of the additional threads may be sufficient in order to specifically achieve greater heating.
• the at least one knitted fabric layer has openings formed by a plurality of stitches.
• the openings allow a particularly open, air-permeable structure, wherein the openings often have approximately a honeycomb shape.
• Acting layers with a corresponding structure are known, for example, from DE 10 2008 020 287 C5.
• channels can be formed between the fabric layers channels, which are free of spacer threads.
• Such channels improve the air permeability and, depending on the application, can also be provided as a kind of predetermined breaking point. Whereas in the case of conventional spacer fabrics the remaining channels represent a weak point and the material can easily collapse there, a certain stabilization in the region of the channels can take place precisely as a result of the at least partial melting of the additional threads.
• the spacer fabric can be used, for example, for the padding of a vehicle seat, a mattress or the like.
• the degree of stiffening can be determined by the choice of material, the proportion and the knitting pattern of the additional threads.
• the first knitted fabric layer and, in a corresponding embodiment, also the second knitted fabric mainly consists of the stitch threads.
• the weight ratio of all the additional threads of the first knitted fabric layer to all the stitch threads of the first knitted fabric layer can be between 1: 1 and 1:10, in particular 1: 2 and 1: 8.
• a multifilament yarn is preferably used for the additional threads, in which case the filaments expediently consist of a uniform polymer material.
• the filaments expediently consist of a uniform polymer material.
• the mesh threads may be arranged in a fringe placement, with other laying patterns such as jersey, cloth, twill, satin or the like come into consideration.
• polyester may be provided as the material of the spacer knit fabric.
• the stitch threads and the additional threads of the first knitted fabric and optionally also the second knitted fabric layer of different types of polyester, in particular polyethylene terephthalate (PET) are formed, which achieved by the measures described above in the preparation is that only the additional threads are melted and subsequently solidified again.
• PET polyethylene terephthalate
• the first knitted fabric, the second knitted fabric and the spacer yarns are formed therebetween with a plurality of rows of needles each having a plurality of parallel yarns, forming wales or warp strands running in the direction of production and successive courses of stitches in the direction of production.
• channels are provided at least along the production direction, which can be generated in a particularly simple manner by omitting spacer threads.
• the channels can be formed in a uniform grid by omitting at least one spacer thread running in the direction of production. For example, it is possible to omit every second, every third, every fourth or every fifth spacer thread in order to create a channel there.
• channels can also be formed in the transverse direction in such a way that the spacer threads are guided on mutually spaced courses of stitches, preferably also in a uniform grid, in one of the two knitted layers in the production direction.
• the arrangement of the longitudinal or transverse channels in a fixed grid with a uniform distance between the channels and a uniform channel width is not mandatory.
• two or more transversely consecutive spacer threads may be omitted.
• the distance between two longitudinal channels results from the number of spacer threads arranged therebetween.
• the channel width and the distance between two consecutive channels in the transverse direction in the case of longitudinal channels can vary almost as desired.
• a sequence of a varying channel width or a varying channel spacing which recurs over a certain distance in the transverse direction or longitudinal direction is also possible.
• the present invention preferably relates to a spacer knitted fabric in which the first knitted fabric has openings formed by a plurality of stitches.
• successive stitches are successively formed one after the other in the production direction and in the transverse direction along the course of stitches.
• the openings represent a structuring that extends over several meshes at least in the production direction.
• the second knitted fabric layer may also have openings in a preferred embodiment of the invention.
• the openings of the first knitted fabric layer and of the second knitted fabric layer are arranged by equipping the spacer knit, that is to say by aligning the knitted spacer fabric under tension and with the supply of heat such that in a plan view of the knitted fabric the openings of the first knitted fabric layer and the knitted fabric Openings of the second knitted fabric layer one above the other or preferably offset from one another.
• the additional threads are melted directly to the production process, so that similar to a conventional finishing process, a heating takes place.
• a heating takes place.
• a substantially uniform structure then preferably results over the entire surface of the spacer fabric with regard to the additional threads.
• the additional threads it is also possible for the additional threads to be melted later or to re-melt the additional threads by a suitable action of temperature in order to change the shape of the spacer knit.
• the predetermined three-dimensional structure can be maintained after cooling and removal from a mold. Nevertheless, the spacer fabric remains relatively soft overall and is still flexible to some extent.
• the at least partially melted additional threads then form a kind of basic structure within the soft and elastic spacing knit, which defines the three-dimensional shape.
• the spacer knit as a uniform comparatively simple material so come at the same time good formability and relatively soft and elastic properties are combined. Regardless of whether the melting of the additional threads in a flat Abstandsgewirke or within a mold, the material remains relatively flexible and in particular is still flexible, so that in the further processing can follow a shape adjustment.
• the spacer fabric according to the invention can also be arranged in an S-shape.
• the entire first knitted fabric layer and possibly also the second knitted fabric layer can be completely removed from the knitted fabric.
• non-stitch-forming tear threads is particularly useful when channels are formed between the fabric layers, which are free of spacer threads. At least a portion of the channels may then be provided with the stitches forming the stitches, whereby then the corresponding knitted fabric layers along the corresponding channels can be separated by tearing the rip threads.
• the spacer fabric can easily be torn into strips, whereby a width of material web of the spacer fabric can be easily broken into small pieces of a predetermined width.
• the rip threads preferably run on the corresponding channels as a single connection between adjacent wales of the stitch-forming stitch threads in a zigzag.
• the non-loop forming additional threads and the non-loop forming tear threads can be processed in a same laying pattern. It is then in the manufacturing process only to ensure that the non-loop forming additional thread is replaced by a tear thread at the desired separation points.
• the tear thread expediently has a low fineness, for which, in particular, thin multifilament yarns are suitable as the tear thread.
• the invention also provides a process for producing a spacer knitted fabric comprising the steps:
• first fabric layer comprises stitch-forming stitch threads and non-stitch forming additional threads
• additional threads comprising a first thermoplastic polymer which preferably has a lower melt or softening temperature as a second thermoplastic polymer from which the stitch threads are formed;
• the spacer knit can then be cut as a blank for further processing from the knitted web.
• Fig. 2 only a first knitted fabric of the spacer fabric in one
• Fig. 3 shows a variant of the spacer fabric according to FIG. 1 in a
• FIG. 1 shows a top view of a spacer knitted fabric with a first flat knitted fabric layer 1 lying above and a second knitted fabric layer 2 arranged underneath. Both the first knitted fabric layer 1 and the second knitted fabric layer 2 each have openings 3a, 3b, which at the Knitting process are each formed by multiple stitches. In FIG. 1 it can be seen that the first knitted fabric layer 1 and the second knitted fabric layer 2 are connected to one another by spacer threads 4.
• FIG. 2 shows in detail the first knitted fabric 1, the second knitted fabric 2 and the spacer yarns 4 not being shown for better recognition.
• the first knitted fabric 1 and the second knitted fabric 2 may be identical or substantially identical.
• the additional threads 6 are shown thicker for better visibility, but this need not correspond in practice with the actual thread thickness. According to the invention, the additional threads 6 are partially melted and solidified again, whereby the first knitted fabric layer 1 is stiffened.
• the additional threads 6 are preferably formed by multifilament yarns, wherein the individual filaments can then be joined together in the at least partially melting.
• the molten additional threads 6 can also bond and fix the stitch threads 5 to a certain extent. The stitch threads 5 still retain their original structure, so that the first knitted fabric 1 stiffened but not completely hard.
• Both the fusion of the individual filaments of the additional threads 6 together and a certain bonding of the stitch threads 5 can contribute to a stiffening of the first knitted fabric 1 and, in the case of a corresponding embodiment, also of the second knitted fabric 2.
• Additional threads 6 are fixed so that such fragments are not released when cropping the spacer knit.
• FIG. 3 shows a variant of the spacer knitted fabric shown in FIG. 1 in an abstracted illustration.
• the first knitted fabric layer and optionally also the second knitted fabric layer are formed from the stitch-forming stitch threads 5 and the non-stitch forming additional threads 6.
• the first knitted fabric layer 1 can then be easily separated at the non-stitch-forming tear threads 7.
• the non-stitch forming tear threads 7 are not melted in contrast to the non-stitch forming additional threads 6 and have a lower tensile strength.
• a non-stitch-forming tear thread 7 is provided in both knitted layers 1, 2 in the same position in the transverse direction one above the other.
• the non-stitch-forming tear threads 7 then extend to a longitudinally extending channel, on which the spacer threads 4 are also recessed.
• the entire spacer fabric can then be torn into strips along these channels.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Knitting Of Fabric (AREA)

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Citations (3)

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• 2014
  • 2014-03-20 DE DE102014103861.4A patent/DE102014103861B4/de active Active
• 2015
  • 2015-03-19 ES ES15711730T patent/ES2907385T3/es active Active
  • 2015-03-19 EP EP15711730.0A patent/EP3119933B1/de active Active
  • 2015-03-19 WO PCT/EP2015/055815 patent/WO2015140259A1/de not_active Ceased
  • 2015-03-19 CN CN201580014945.1A patent/CN106133225B/zh active Active
  • 2015-03-19 US US15/126,675 patent/US11248320B2/en active Active
  • 2015-03-19 KR KR1020167029263A patent/KR20160134832A/ko not_active Ceased
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  • 2015-03-19 JP JP2016558025A patent/JP6606094B2/ja active Active

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