EP1172472B1 - Fabric with double pile network and method for making it - Google Patents

Abstract

The fabric for a contact burr bonding strip application has two grids of loops knitted into the fabric base. The second loop grid has their loop feet (3') linked by loop peaks (4') on the opposite side. Each loop foot of the second set lies on a theoretical plane at the feet (3) of the first set of loops, between them and preferably centered between them. The fabric for a contact burr bonding strip has a first set of loops, where their loop peaks (4) each link together with a loop peak of the second set of loops. The loop feet, in both sets, are arranged along the stitch wales. The contact bonding fabric has a weight of 15-150 g/m<2> and especially 15-40 g/m<2>, using a filament diameter of 17-120 decitex and particularly 22-70 decitex. An Independent claim is included for a fabric production process, using at least two rows of needles between two rows of needles to form the warps and the third bar, to give at least two grids of loops between two consecutive rows of warp needles. The third bar has a pattern lay-out of 10-45. The fabric is laminated to a carrier, by an adhesive.

Description

The present invention relates to a knitted fabric curls or loops. These curls or loops are intended to hang in hooks to form a self-gripping hooking device. This knitted fabric has a bottom, consisting of an interlacing of mesh column and binding wires sense frame, and a network of loops formed of yarns of knitted loops in the background of the fabric, the loops having in particular each two feet that are knitted along the stitch columns and a summit (EP-A-978 583).

Knitted fabrics of this kind of the prior art have the first disadvantage that all loops are formed by being oriented in the same direction, that is to say the top of each loop is always on one side given (left or right) the feet of the buckle for all the loops of the fabric. This translates into a less good hooking hooks of the self-gripping in one direction compared to the opposite direction. These knitted fabrics of art prior art have the further disadvantage that the percentage of threads used to form loops is much lower than that of the wires used to form the background. Now, for a self-gripping the useful part snap is made of loops and so we want use wire as much as possible to form loops.

The present invention aims to overcome these two disadvantages simultaneously, that is, to obtain a tissue knitted fabric which has the same hanging capacity, as female part of a hook and loop, in one direction and in the other of the direction of the fabric (weft direction) and in which a greater proportion of the yarns of the fabric is used to form loops, for example from 40% to 70% of all the threads of the fabric, especially from 50% to 60%.

• un fond constitué d'un entrelacement de fils de chaínette, ou colonnes de mailles, et de fils de liaison sens trame, et
• un premier réseau de boucles tricotées dans le fond, chacune étant constituée de deux premiers pieds tricotés dans le fond, de deux premiers brins partant des premiers pieds et d'un premier sommet de liaison des deux premiers brins, chaque premier sommet se trouvant d'un côté donné des deux premiers pieds pour toutes les premières boucles,

est caractérisé en ce qu'il comporte un deuxième réseau de boucles tricotées dans le fond, chacune étant constituée chacune de deux deuxièmes pieds tricotés dans le fond, de deux deuxièmes brins partant des deux deuxièmes pieds et d'un deuxième sommet de liaison des deux deuxièmes brins, chaque deuxième sommet se trouvant du côté opposé au dit côté donné des deux deuxièmes pieds pour toutes les deuxièmes boucles, et chaque deuxième pied se trouvant sur la droite imaginaire reliant deux premiers pieds d'une première boucle, entre ces deux premiers pieds, de préférence à mi-distance.According to the invention, the knitted fabric with loops, comprising

• a bottom consisting of an intertwining of warp threads, or columns of stitches, and weft connecting threads, and
• a first network of loops knitted in the bottom, each consisting of two first knitted feet in the bottom, two first strands starting from the first feet and a first connecting top of the first two strands, each first vertex being a given side of the first two feet for all the first loops,

is characterized in that it comprises a second network of loops knitted in the bottom, each consisting each of two second knitted feet in the bottom, two second strands starting from the second two feet and a second connecting vertex of the two second strands, each second vertex being on the opposite side to said given side of the two second legs for all second loops, and each second foot lying on the imaginary line connecting two first legs of a first loop, between these first two feet preferably at mid-distance.

To be able to get this new fabric to two networks of loops, the plaintiff has found a new process, which uses only three bars on the profession by providing for a new separation between each row of chain shaping needles, to know a spacing of at least two rows of needles between two rows of chain shaping needles instead of one in the prior art, and the third bar of the profession, dedicated to the training of loops, acts on two threads that she knits simultaneously, these both offset by a gap corresponding to the spacing between two rows of needles, so that two orientation networks can be realized at the same time opposed.

According to an improvement of the invention, each first vertex of a first loop intertwines in a second vertex of a second loop.

This gives a greater strength of the fabric as a whole and in particular a better resistance of this one in the case where a thread of the bottom is torn, the intertwining of loops to circumscribe the spread of the hole, created by tearing the wire.

According to a preferred embodiment of the invention, the feet of the loops are formed along the mesh columns.

According to a preferred embodiment, the fabric has a basis weight of between 15 g / m ² and 150 g / m ² , in particular between 15 g / m ² and 40 g / m ² , for a wire diameter of between 17 and 120 decitex, especially between 22 and 70 decitex.

The present invention also relates to a method of manufacturing a fabric as described previously.

According to the invention, the manufacturing process a looped fabric on a loom with rows needles, including the steps of using three guide bars, the first of which serves to form chains in cooperation with certain needles, a second is used to form weft-sense links with formation needles chains, and a third serves to form, alternately stitches (the feet of loops) on chain formation needles in a row and stitches (top of loops) on needles between two rows of needles chain formation, is characterized in that at least two rows of forming vertices of loops between two rows consecutive chain training needle and the third bar acts on two yarns to knit at least two networks of loops between two rows of needle chain formation consecutive, the two sons being offset by a distance corresponding to the distance between two rows of needles on the craft.

According to an advantageous embodiment possible, we use a 10 - 23 armor for the third closed off.

According to another advantageous embodiment possible, we use a 10 - 45 armor for the third closed off.

The present invention also aims at a set laminate comprising a fabric according to the invention attached to a support, especially by laminating.

In particular, the invention aims at a set laminate whose support is a diaper.

Finally, the present invention aims at a diaper pants having a hook-and-loop portion comprising a fabric according to the invention.

La figure 1 représente un graphique de fabrication d'un tricot bouclé suivant l'invention, en utilisant une armure 10 - 23 pour la troisième barre,

La figure 2 représente un graphique de fabrication d'un autre tricot bouclé suivant l'invention, en utilisant une armure 10 - 45 pour la troisième barre,

La figure 3 représente un graphique de fabrication d'encore un autre tricot bouclé suivant l'invention, les colonnes de mailles étant ici écartées de 3 rangées d'aiguilles au lieu de 2 aux figures 1 et 2, en utilisant pour la troisième barre une armure 10-34, et

la figure 4 représente un graphique de fabrication d'encore un autre tricot bouclé suivant l'invention, les colonnes de mailles étant ici écartées de 3 rangées d'aiguilles au lieu de 2 aux figures 1 et 2, en utilisant une armure 10-56 pour la troisième barre, et

la figure 5 représente une couche-culotte suivant l'invention comportant une partie autoagrippante suivant l'invention.

Two preferred embodiments of the invention are now described, given by way of example only, with reference to the drawing, in which

FIG. 1 represents a graph of manufacture of a curly knit according to the invention, using a weave 10 - 23 for the third bar,

FIG. 2 represents a manufacturing graph of another curly knit according to the invention, using armor 10 - 45 for the third bar,

FIG. 3 represents a manufacturing chart of yet another looped knit according to the invention, the stitch columns being here separated from 3 rows of needles instead of 2 in FIGS. 1 and 2, using for the third bar a 10-34 armor, and

FIG. 4 shows a manufacturing chart of yet another looped knit according to the invention, the stitch columns being here separated from 3 rows of needles instead of 2 in FIGS. 1 and 2, using a 10-56 armor. for the third bar, and

FIG. 5 represents a diaper according to the invention comprising a self-gripping part according to the invention.

The process of making a curly knit on trade chain illustrated by the graph of Figure 1 consists of working with three guide bars. A first bar is used to form chains 1 in cooperation with a row (vertical to the figure) of needles on three in the example considered. A second bar to passette serves to form links 2 frames in cooperation with chain shaping needles 1. Finally, a Third guide bar is used to alternately form mesh 3 and 3 '(the feet of the buckles) on needles chain formation in a row and stitches corresponding to vertices of loops 4, 4 'on both rows of needles between two rows of needles formation of consecutive chains.

The frame link is here represented by a non-meshed system (raster); however a mesh system or an alternating system are also possible. As to chaínettes, or columns of stitches, they can be open, closed or alternating (two meshes in one direction, two in another).

The fabric on the loom shown in FIG. comprises two networks of loops, namely the first network of loops comprising feet 3 and loop vertices 4 and a second loop network consisting of feet 3 'and loop vertices 4'. Bar C with gusset for the formation of the loops knit all the loops in the same direction of scrolling the knitting on the job. However, it acts on two staggered wires of the distance between two rows of adjacent needles and given the fact that we have now left two rows free needles between two rows of chains consecutive, the two loop networks have their loops oriented in opposite directions, that is to say in FIG. loop network with 3 feet and 4 vertices is oriented towards the left of the drawing while the network of loops with feet 3 ' and vertices 4 'is oriented to the right of the figure. A foot 3 'of a loop 4' is along a chain 1 between two feet 3 of the first network of loops. Foot 3 ' in question is halfway between two feet 3 of a first loop next door.

For a 50 decitex yarn, approximately 60% of the yarns fabric are used to form loops. For the same decitex of yarn, that is to say for yarns of 50 decitex also, and in the case of the fabrics of the prior art where no left a single row of training needle loops between two rows of mesh columns adjacent, and for a single loop network such as example the first loop network described above, this percentage was about 30% or 35%.

The race of the bar C for the training of loops in 10-23 armor. Needles (represented by points in Figures 1 and 2) are distributed on the loom according to a line matrix (horizontal in the figure) and columns or rows (vertical to the figure), the columns or rows being numbered from 0.

The cycle of the bar C is as follows. In one first time, she unravels a first thread in a needle of one of the two rows of needles between stitch rows of stitch or chain column (column 1), to form a second loop vertex then mesh a second thread in a needle where has already been meshed a column of mesh (column 0) to form by mesh a foot of a loop.

In a second step, the bar unravels the second yarn in one needle on the other of the two rows (column 2) to form a first loop vertex and mesh the second yarn in the next stitch column (column 3) to form a foot of a second loop.

Then the cycle resumes.

In Figure 2 is shown another mode of substantially identical to that of Figure 1. However, here the loops of the first network intertwine at their top 4 with the loops of the second network at their 4 'summit. We have here more loops large size due to the fact that the loops intertwining retain, once removed from the trade, a longer length important that this is the case in the embodiment of Figure 1. The bar C loops, for knitting these two loop networks, follows a 10 - 45 armor.

The beginning of the cycle of the C-bar is identical to that of the embodiment of FIG. the second part of the cycle instead of respectively unmount and mesh at columns 2 and 3 the bar demaille and mesh in columns 4 and 5. This way intertwining the loops together additionally allows to have a snapping even more identical in both directions than in the case of Figure 1. Indeed, in the case of Figure 1, there are two networks of loops each oriented in a meaning. However, there is a loop network oriented in the meaning of the scroll of the fabric on the craft and a network of loop that is oriented in the opposite direction. It follows that the loops have a tendency according to whether they are of a network or another to protrude the fabric so different. In the case of the fabric of Figure 2, this problem is solved since the loops in the direction of scrolling the fabric with them the loops in the opposite direction in the sense of unfolding the fabric so that all loops tend to protrude from the fabric of the same way and thus to allow a more even hooking in both ways.

Figure 3 shows a looped fabric on his identical to that of Figure 1, except that the columns of stitches or chains 1 are spaced apart others of three rows of needles instead of two. By therefore the bar C follows a 10-34 armor.

Similarly, FIG. 4 represents a looped fabric on the same as in Figure 2, except that the chaínettes 1 are spaced from 3 columns or rows needles instead of two. Therefore the C-bar follows a 10-56 armor.

Figure 5 shows a diaper 5 comprising a self-gripping device comprising a part female 6 consisting of a knit according to one of FIGS. or 2 laminated on a support itself laminated or heat-sealed or otherwise affixed to the edge of the diaper, which one wants to fix thanks to the self-gripping by the male part 7 located at the other edge.

Claims (10)

1. A looped knitted fabric comprising:

   a foundation comprising interlaced chain-stitch threads or wales and connecting threads without a weft, and

   a first network of loops knitted in the foundation, each comprising two feet (3) knitted in the foundation, two first strands extending from the first feet (3), and a first crest (4) connecting the two first strands, each first crest (4) being on a given side of the two first feet (3) in the case of all the first loops,

      characterised in that it comprises a second network of loops knitted in the foundation, each comprising two second feet (3') knitted in the foundation, two second strands extending from the two second feet, and a second crest (4') connecting the two second strands, each second crest (4') being on the side opposite the said side of the two second feet (3') in the case of all the second loops, and each second foot (3') lying on the imaginary line connecting two first feet (3) of a first loop, between and preferably half-way between the two first feet.
2. A fabric according to claim 1, characterised in that each first crest (4) of a first loop is interlaced in a second crest (4') of a second loop.
3. A fabric according to claim 1 or 2, characterised in that the feet of the first and second loops are formed along the wales.
4. A fabric according to any of the preceding claims, characterised in that the fabric has a weight between 15 g/m² and 150 g/m², inter alia between 15 g/m² and 40 g/m², in the case of a thread diameter between 17 and 120 decitex, inter alia between 22 and 70 decitex.
5. A method of producing a fabric according to any of the preceding claims, comprising steps consisting in using three guide bars, a first for forming the chain stitches in co-operation with some needles, a second for forming weft connections with the chain stitch-forming needles, and a third for alternately forming meshes (the feet of the loops) on the chain stitch-forming needles in one row and loops on the needles between the said chain stitch-forming needles of the chain stitch-forming needles in a following row, characterised in that at least two rows of needles are provided between two rows of chain stitch-forming needles and the third bar forms at least two networks of loops between two consecutive rows of chain stitch-forming needles.
6. A method according to claim 5, characterised in that a 10-23 weave is used for the third bar.
7. A method according to claim 6, characterised in that a 10-45 weave is used for the third bar.
8. A laminated assembly comprising a fabric according to any of claims 1 to 5 fixed to a support, inter alia by pasting.
9. A laminated assembly according to claim 8, characterised in that the support is a pilch.
10. A pilch comprising a self-gripping female part (6) fixed to a hooked male part (7), the self-gripping female part (6) comprising a fabric according to any of claims 1 to 5.

Images