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
  • D04B21/02—Pile fabrics or articles having similar surface features
• • 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
  • D10B2403/01—Surface features
  • D10B2403/011—Dissimilar front and back faces
  • D10B2403/0112—One smooth surface, e.g. laminated or coated
• • 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
  • D10B2403/03—Shape features
  • D10B2403/031—Narrow fabric of constant width
  • D10B2403/0311—Small thickness fabric, e.g. ribbons, tapes or straps
• • 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
  • D10B2501/00—Wearing apparel
  • D10B2501/06—Details of garments
  • D10B2501/063—Fasteners
  • D10B2501/0632—Fasteners of the touch-and-close type
• • 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

Definitions

• Knitted device with loops in particular for forming the female part of a hook-and-loop fastener for fixing a cover of an automobile seat
• the present invention relates to a knitted device, in particular a knitted mesh, with gripping loops, comprising a first zone, in particular central, comprising loops intended to cooperate with hooks associated with a hook element and at least one second edge zone, in particular two second edge zones on either side of the first central zone with loops, contiguous to the first zone with loops and not comprising any loops.
• the present invention also relates to a cap intended to cover a foam object produced by molding, for example an automobile seat, the cap comprising on its face intended to be in contact with the molded object a knitted device with loops of the type mentioned. previously, the knitted loop device being fixed, in particular sewn, to the cap, in particular at the level of the at least one second edge zone.
• the present invention also relates to a molded object, for example an automobile seat, covered with a cover of this kind.
• a foam is first molded in the shape of the seat to be obtained and during molding, the hooks are overmolded so that they protrude from the bottom of cavities or trenches formed at the outer surface of the molded object to allow the attachment around the object of a cap by means of loops from the cap.
• loops are produced by means of a knitted device with loops generally comprising a central zone, from which protrude knitted loops, and two edge zones, left and right, which do not protrude from loops knitted and at which the attachment, in particular by sewing, of the knitted device with loops to the cap is carried out to allow the latter to be attached to the molded object by means of hooks overmolded to the molded object.
• a knitted device in particular a knitted stitch, comprising a first zone, in particular rectangular, from which protrude loops and at least one second zone, in particular rectangular, contiguous, preferably two contiguous zones on either side on the other side of the first zone, the second contiguous selvedge zone (s) not comprising loops and being intended to allow the attachment of the knitted device to a cap intended to cover a molded object, in particular an automobile seat, for example by sewing, while the first loop zone is intended to cooperate with hooks projecting from the molded object, the knitting comprising a base consisting of an interlacing of chain threads , or columns of stitches, and weft yarns and, in the first area of the loop yarns knitted in the background, each loop consisting of two feet knitted in the background, two strands from both feet and a top of connection of the two strands, is characterized in that means are provided for preventing or combating the scoring of the threads of the knitted device forming the second
• the means for preventing or combating chaffing of the threads are arranged over the entire width of the second (s) edge zone (s).
• the caps are perfectly fixed to the molded object, without undergoing any slippage associated with a deterioration over time of the edges due to the stresses they may undergo between on the one hand the fixing, in particular by sewing, and on the other hand the fixing of the hooks to the loops, as well as due to the tension undergone by the cap in use.
• the term “gripping loop” is understood to mean a loop which protrudes from the plane formed by the bottom of the knitting and / or a loop extending in a plane different from that of the bottom of the knitting.
• the means for combating scuffing consist of covering the zone (s) of the edge with a coating, for example a resin or 'an adhesive which, after hardening, gives the edges great dimensional stability and thus prevents their scuffing.
• the knitted device is a knitted fabric comprising a bottom consisting of an interweaving of chain threads, or columns of stitches, and weft threads and, in the first central zone of the threads of loops knitted in the background, each loop consisting of two feet knitted in the background, of two strands starting from the two feet and a connecting vertex of the two strands, the bottom weft threads extending back and forth in a transverse direction so as to zigzag around in the machine direction a number N of rows of columns of stitches between 2 and 5, in particular 3 rows, and this over the entire transverse extent of the base, with the exception of a number N - 1 of successive end rows of columns of stitches, in particular nt of a number of N-1 last rows.
• the CD distance between two consecutive weft son is between 75% and 125% of the CD distance between two son of consecutive chains.
• the weft son of the bottom extending in a back and forth movement in zigzag, two weft son of the adjacent bottom are substantially parallel, more particularly the zigzag shape of the two weft son of the adjacent bottom is such that A point of the zigzag shape of a first weft yarn and a point of the zigzag shape of a second weft yarn form a segment extending substantially parallel to the CD direction.
• the weft son of the bottom extending in a back and forth movement in zigzag, the distance in MD between two contiguous MD ends of the same weft thread is between 0.5 mm and 5 mm, in particular between 0.8mm and 3mm, more particularly of the order of 1.8mm.
• the distance in CD between two adjacent ends in CD of the same weft yarn is between 0.6 mm and 25 mm, in particular between 2mm and 10mm.
• the CD distance between two adjacent CD ends of the same weft wire is between 0.6mm and 10 mm, in particular between 2mm and 4mm, more particularly of the order of 3mm.
• the CD distance between two adjacent CD ends of the same weft yarn is between 1 mm and 15 mm, in particular between 3mm and 6mm, more particularly of the order of 4.5mm (ie 1/5 of an inch).
• the distance in CD between two adjacent ends in CD of the same weft yarn is between 1.33 mm and 20 mm, in particular between 4mm and 8mm, more particularly of the order of 6mm.
• the CD distance between two adjacent CD ends of the same weft thread is between 1.67 mm and 25 mm, in particular between 5mm and 10mm, more particularly of the order of 7.5mm.
• the segment connecting the two feet of a loop extends in the MD direction and in the CD direction, thus forming an angle with respect to the MD direction preferably between 10 ° and 80 °, in particular in some cases between 30 ° and 75 °.
• the tilt is alternated from loop to loop in the CD direction, that is, the angle is alternately positive and negative.
• each loop consists of two feet knitted in the bottom and each foot belongs to different contiguous columns, the shape in zigzag is obtained after N rows of mesh columns or picks, without float, that is to say without skipping a row of mesh.
• weft yarns which extend in zigzag fashion, for example over 3 rows of columns of stitches and over the entire width, it is ensured that the edge zones do not fray.
• it is equally effective to fight against scuffing and this for a lower cost, and in particular by being able to dispense with the use of less expensive coating material, such as than resin or hardening glue, as well as simplified manufacturing with fewer steps.
• the anti-scuffing means are implemented so that, when drawing the curve giving the force necessary to deform the knit in the transverse direction (CD) as a function of the deformation between the origin of coordinates (0, 0) and the breaking point R (recognizable by a sudden drop in the curve, for example a sudden change in force greater than 10%, especially greater than 15%), the curve is always below the line connecting the origin and point R.
• CD transverse direction
• the value of the force at 25% of the deformation is less than 150N, preferably less than 125N, even more preferably less than 100N, in particular less than 50N, or even 35N.
• the value of the force at 50% of the deformation is less than 350N, preferably less than 335N, even more preferably less than 300N, in particular less than 225N, or even 190N.
• the knitting comprises a first central zone with loops and two second contiguous selvedge zones, left and right.
• the knitting is carried out on a three bar loom, in particular a loom with three yarn distribution bars and a platen bar.
• the knitting is carried out on a warp loom with three bars, in particular a loom with three yarn distribution bars, and a platen bar.
• the knitting is carried out on a chain loom with three bars, one bar of which is a guide bar and two other bars being tube bars.
• the knitting is carried out on a warp loom, more particularly a crochet loom (for example a crochet loom sold by the company COMEZ and / or Jakob Müller AG Frick under the reference Cornez 610 ACO, more precisely Cornez 610 ACO - 15).
• the loop weave is a loop weave with closed mesh 10/12 //.
• the loop weave is an open loop weave, namely a 01/21 // weave.
• the present invention also relates to a molded object, for example an automobile seat, comprising a block of molded material, in particular of foam, having the shape of the object, in particular of the automobile seat, and a cap covering the block , the fixing of the cover to the block being effected by cooperation between hooks, in particular a plurality of fields of hooks originating from the outer surface of the molded object, and of knitwear with loops according to the invention attached, in particular sewn to the cover, in particular on the underside of the cover.
• the materials of the weft, loop and warp threads can be identical or different from each other, by choosing them for example from Polyethylene terephthalate (PET), Polypropylene (PP), aramid , Polyamide (PA), Polyethylene (PE) or the like, as well as their mixtures. They can also be elastic or elastomeric and / or heat-bonding materials.
• the yarns can be flat, textured wrapped and / or twisted.
• the weft, loop and warp yarns may be identical or of different types in a single component, two-component or more material.
• FIG. 1 is a schematic perspective view of a molded object, in which the cap covering it is shown at a distance from the molded object;
• FIG. 2 represents a theoretical knitting weave of all the threads to be used in the device of FIG. 1, in particular the knitting sewn to the cap of FIG. 1;
• FIG. 3 represents the theoretical knitting armor alone of the warp or chain yarns of the knitting of FIG. 2;
• FIG. 4 represents the theoretical knitting armor alone of the weft yarns of the knitting of FIG. 2;
• FIG. 5 represents the theoretical armor of only loops of the knitting of FIG
• FIG. 6 represents a second embodiment of the loop weave
• FIG. 7 represents a third embodiment of the loop weave
• FIG. 8 represents a theoretical knitting weave according to an embodiment using the weft weaves of FIG. 4, of columns of stitches of FIG. 3 and of loops of FIG. 7;
• Figure 9 shows a knit according to yet another embodiment of the invention.
• FIG. 10 represents the curve giving the force necessary to deform a knitting according to the invention, namely a knitting comprising the weft threads of FIG. 4, the chain threads of FIG. 3 and the so-called loop threads open / closed in figure 7, as a function of the deformation, in particular between the point of origin (0, 0) and the point of failure R, and
• Figure 11 shows the curve giving the force necessary to deform a knitting according to the invention, namely a knitting comprising the weft son of Figure 4, the chain son of Figure 3 and the son of loops of FIG. 5 or of FIG. 6, depending on the deformation, in particular between the point of origin (0, 0) and the point of failure R.
• FIG. 1 there is shown a molded object in the form of an automobile seat comprising a block 1 of foam, in particular polyurethane, having the shape of the automobile seat and which comprises a plurality of trenches 2 at the bottom of which was fixed, in particular by insertion prior to the molding of a strip 3 with hooks 14 to be overmolded rectangular.
• the molded object namely the automobile seat, is covered with a cap 4, which perfectly matches the outer surface of the block 1.
• the cap 4 is sewn to a knitted device 5, which has a central zone 6. , from which 9 knitted loops protrude, and two edge zones 7 and 8, which are each sewn to the underside of the cap 4.
• the cap 4 is fixed around the molded block 1, perfectly matching its shape.
• the molded object is thus obtained covered with its final cover, for example an automobile seat.
• Figures 2 to 5 illustrate the weave of a looped knit on a warp loom, which consists of working with three guide bars and tubes.
• a first guide bar is used to form chains or columns of stitches, 10 in cooperation with each row (vertical in the figures) of needles.
• the second tube bar serves to form weft connections 11 in cooperation with the chain forming needles 10.
• a third tube bar is used to form stitches on a plate bar in the central part of the knitting (rows 7 to 19). 12 (the feet of the loops) on all needles.
• the looped wire thus forms the tops 13 of the loops.
• the frame links ( Figure 4) are represented by a non-meshed system (screened) 10. As for the chains, or columns of stitches, they can be open or alternated.
• each weft son as shown in Figure 4, extends in a 00/33 // weave.
• each weft thread extends in zigzag way in the machine direction (vertical in the figures) passing around three needles of three successive rows in the transverse direction (from left to right in the figure
• the number of weft threads is equal to the number of rows of mesh columns minus N plus 1.
• the zigzag extends in the MD direction and is formed on each row of mesh.
• Figure 2 the work of the bar of the mesh columns is shown. This is a classic job, which is not described further here.
• the weave of the weft is shown.
• Each weft thread extends zigzag around three needles, each weft zigzag thread extends directly following the previous weft thread. There are therefore as many weft threads as there are columns of stitches or columns of needles, less with the exception of the last two, which once in two are bypassed / blocked / taken in zigzag fashion by the weft threads.
• the loop weave shown in Figure 5 is a loop weave with closed 10/12 //.
• the loop weave is an open loop weave, namely a 01/21 // weave.
• a weave of so-called open / closed loops is produced, namely a weave 10/01/21/12 //.
• the knitting was carried out with only three bars of son.
• a fourth yarn distribution bar to produce a weft in the opposite direction, for example a weft identical to that of FIG. 4, or on the contrary a weave having fewer wefts, for example of such so that every second chain does not have a weft, even two chains over three or three chains out of four.
• knitting is carried out with only three bars.
• Knit 5 ' shows another embodiment of the invention.
• the knit 5 'with loops has a central zone 6' and two edge zones 7 'and 8'.
• Knit 5 ' consists of a background made up of an interlacing of weft threads and column threads of stitches and, in the central part, of loop threads knitted to form loops.
• the background may be as described above or on the contrary be different, namely for example weft threads which extend in zigzag fashion over the entire width of the background (as shown in FIG. 9) or over a number of rows greater than 5 It is also possible to provide weft threads which do not extend in succession over the entire width of the knitting, for example by leaving one row out of two or three without weft threads.
• a resin allowing mechanical anchoring for example of the HMA adhesive type (Hot Melt Adhesive in English) with high viscosity, for example based on SBC (Styrene Block Copolymer in English or block copolymer with a sequence of Styrene), based on polyolefin (PO), based on Polyurethane (PU) and / or a chemical anchor.
• HMA adhesive type Hot Melt Adhesive in English
• SBC Styrene Block Copolymer in English or block copolymer with a sequence of Styrene
• PO polyolefin
• PU Polyurethane
• PU Polyurethane
• FIG. 9 one could as an alternative or in addition to the layers of resins 15 and 16 in which the edges are taken, to carry out a thermal step, for example of hot calendering and / or an ultrasonic welding in the edges. edge zones to reinforce them and fight against the scuffing likely to appear due to this frame structure.
• the anti-scuffing means consist of the defined structure of the bottom frames.
• these anti-scuffing means consist of the coating and in particular the layers of resins 15 and 16 in which the edges are taken.
• the coating is more expensive and more complex to carry out.
• Figures 10 and 11 there is shown the curve giving the force necessary to deform knits in the transverse direction (CD) according to the invention as a function of the deformation.
• This curve is conventionally obtained using a dynamometer, in particular by applying the method described in Standard NF EN1415, using the elongation at break test in the CD direction, which consists in placing a sample of the knitting between two jaws (distance between jaws equal to 20mm) of a dynamometer (tensile speed of 100mm / min).
• the value of the force at 25% of the deformation is less than 150N, preferably less than 125N, even more preferably less than 100N, in particular less than 50N, or even 35N.
• the value of the force at 50% of the deformation is less than 350N, preferably less than 335N, even more preferably less than 300N, in particular less than 225N, or even 190N.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Knitting Of Fabric (AREA)
• Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=67384067

Family Applications (1)

Country Status (8)

Family Cites Families (22)

• 2019
  • 2019-04-08 FR FR1903735A patent/FR3094727B1/fr active Active
• 2020
  • 2020-03-31 JP JP2021555888A patent/JP7440529B2/ja active Active
  • 2020-03-31 WO PCT/EP2020/059071 patent/WO2020207856A1/fr unknown
  • 2020-03-31 US US17/601,598 patent/US11946176B2/en active Active
  • 2020-03-31 EP EP20713909.8A patent/EP3953516A1/de active Pending
  • 2020-03-31 BR BR112021017286A patent/BR112021017286A2/pt unknown
  • 2020-03-31 KR KR1020217031850A patent/KR20210142654A/ko unknown
  • 2020-03-31 CN CN202080027381.6A patent/CN113661281A/zh active Pending

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