Water-absorbent item for drying the body, such as a bath towel, and method for manufacturing such an item
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- DECATHLON SA
- Filing Date
- 2026-01-23
- Publication Date
- 2026-08-06
Smart Images
Figure EP2026051675_06082026_PF_FP_ABST
Abstract
Description
[0001] Description
[0002] Title of the invention: Water-absorbing body-wiping article, such as a bath towel, and method for manufacturing such an article
[0003] Technical Field
[0004] The present invention relates to the technical field of water-absorbing body wiping articles comprising microfilaments, such as a bath towel.
[0005] The present invention also relates to the technical field of manufacturing processes for such water-absorbing body wiping articles comprising microfilaments.
[0006] Previous technique
[0007] We are familiar with absorbent body towels, particularly bath towels, which incorporate synthetic materials for quick drying and microfilaments for high water absorption. Such body towels must be tear-resistant and maintain their shape well when wrung out, crumpled, or washed. Furthermore, they must feel pleasant against the skin and be compact to save space. Therefore, thick towels with loops on their surface, typically made of cotton, will not meet the requirements for quick drying and compactness.
[0008] Such body-wiping articles containing microfilaments, also called microfibers, are generally obtained by treating a woven fabric from a provisional yarn containing two distinct polymers separable by caustic soda, for example, polyamide and polyethylene terephthalate. The caustic soda treatment separates the polyamide from the polyethylene terephthalate, thus forming microfilaments.
[0009] Such wiping products have the disadvantage of being produced using polluting manufacturing processes involving the use of caustic soda or acid, depending on the polymers to be separated. Furthermore, the polymers used are chemically different, for example, polyamide and polyester, and are incompatible with each other in subsequent recycling operations. However, it is not possible to separate polyester filaments from polyamide filaments.
[0010] The formation of microfilaments after weaving has the advantage that weaving is facilitated because the woven filaments have a high linear mass, notably significantly greater than 1 dtex, and are therefore more resistant during weaving and form less dust.
[0011] The aim is to reduce the environmental impact of the manufacturing processes of such water-absorbing body wipes, in particular by not using treatment with soda or acid.
[0012] We also seek to improve the environmental impact of body wiping products by improving their recyclability. Finally, we are looking for water-absorbing body wiping products with good dimensional stability in use and washing, tear resistance, quick drying, compactness so that they can be folded with minimal bulk, little or no dust generation, softness to the touch with the skin, and good water absorption properties.
[0013] Description of the invention
[0014] The present invention relates, according to a first aspect, to a water-absorbing body-wiping article, such as a bath towel, alleviating all or part of the aforementioned problems in that said article comprises, in particular, a knitted textile with drop stitches comprising columns of stitches and rows of stitches, said knitted textile with drop stitches comprising: - a multifilament yarn A, and a multifilament yarn B, each of which is knitted so as to form knitted stitches extending over at least two columns of stitches, and a composite yarn C knitted so as to extend over at least two columns of stitches, in particular the composite yarn C forms weft drop stitches extending over at least two columns of stitches or forms open and / or closed knitted stitches extending over at least two columns of stitches, more particularly extending over at least three columns of stitches,even more particularly extending over at least four mesh columns, in particular extending over at most eight mesh columns, or,
[0015] - a multifilament yarn A, and a multifilament yarn B, each knitted to form chain stitches, or knitted stitches extending over at least two stitch columns, more particularly over at least three stitch columns, even more particularly over at least four stitch columns, notably over at most eight stitch columns, and a composite yarn C knitted to form weft loops extending substantially over all the stitch columns (i.e., substantially over all the stitch columns of the knitted article with looped stitches), said knitted composite yarn C comprising a multifilament yarn C1 comprising filaments each having a linear density greater than or equal to 1 dtex and a multifilament yarn C2 comprising filaments each having a linear density less than 1 dtex, and the knitted textile with looped stitches has a basis weight greater than or equal to 100 g / m² 2and includes polyester filaments whose mass fraction in the discarded stitch knit textile is greater than or equal to 50%.
[0016] Advantageously, the body wiping article includes, notably, a knitted fabric with dropped stitches, which inherently has a lower elongation than a knitted fabric with picked stitches, and thus better dimensional stability.
[0017] In this text, the term microfilament refers to any filament with a linear density of less than 1 dtex. Indeed, composite yarn C is not composed exclusively of microfilaments, as the microfilaments provided by yarn C2 are combined with larger filaments provided by yarn Cl. Yarn Cl thus improves the mechanical strength of composite yarn C. Furthermore, yarn Cl and yarn C2 exhibit different shrinkage behaviors in hot water (which shrinkage was activated in the manufacturing process described below), so activating the shrinkage also advantageously adds bulk to composite yarn C in the finished yarn over. Moreover, composite yarn C advantageously includes microfilaments that are not obtained through treatment with caustic soda or acid.
[0018] Advantageously, microfilaments are easier to knit onto the hollow needles of drop-stitch knitting machines than microfibers. Microfibers tend to accumulate and clog the knitting needles.
[0019] Surprisingly, it is also observed that knitting a body wiping item, in particular the operation of the knitting machine, compared to weaving, allows the production of a greater quantity (weight) of wiping item for the same energy consumption (especially electrical energy), which further improves the environmental balance.
[0020] Advantageously, the knitted fabric with discarded stitches comprises at least 50% by mass of polyester filament(s), in particular is substantially made of polyester filament(s), so that its recycling is facilitated since no separation step between materials is necessary.
[0021] Advantageously, yarns A and B are knitted so as to form: either each of the knitted stitches extending over at least two columns of stitches, or each of the chain stitches,
[0022] or yarn A forms chain stitches and yarn B forms knitted stitches extending over at least two columns of stitches, on one side of the yarn over, and composite yarn C is knitted to form the second side of the yarn over, substantially opposite to the first side, in particular with either knitted stitches also extending over at least two columns of stitches, or with weft yarn overs. This arrangement advantageously concentrates the microfilaments on the second side of the yarn over. The inventors were surprised to find that this optimization of the quantity of microfilaments makes it possible to obtain absorption performance similar to that obtained when yarns A and B also include microfilaments.Preferably, the multifilament yarns A, B, and C are each knitted to form knitted stitches extending over at least two columns of stitches, with yarns A and B being knitted in opposition. This arrangement balances the yarn overs and places the microfilaments predominantly on one side, i.e., the second side, making them more readily available for wiping and water absorption. Furthermore, this improves dimensional stability during washing and use.
[0023] Preferably, the knitted fabric with yarn overs comprises a first face and a second face substantially opposite the first face, and said knitted fabric with yarn overs does not include any prominent loops that are knitted so as to project along said first face and / or along said second face, said prominent loops optionally being sheared. In one embodiment, said knitted fabric with yarn overs comprises a multifilament yarn A and a multifilament yarn B, each of which is knitted so as to form chain stitches and / or knit stitches, and a composite yarn C knitted so as to form weft yarn overs extending over substantially all the stitch columns of the knitted fabric. In a first example, yarn A and yarn B each form chain stitches.
[0024] In a second example, yarn A and yarn B each form knitted stitches extending over at least two columns of stitches, and in particular at most eight columns of stitches.
[0025] In a third example, yarn A forms knitted stitches and yarn B forms chain stitches. This type of knit can be produced on a knitting machine known as a weft knitting machine, for example, the Karl Mayer Wefttronics® or HKS2 MSU. This type of knit offers good dimensional stability but less flexibility, and is stiffer, than the knit consisting only of knitted stitches with optional weft yarn overs formed over at least two columns of stitches, as described previously (and in which the weft yarn overs do not extend over all columns of stitches).
[0026] In a preferred embodiment, the multifilament yarns A and B are each knitted to form knitted stitches extending over at least two columns of stitches, and the composite yarn C is knitted to form knitted stitches, or weft yarn overs, extending over at least two columns of stitches, in particular over at most eight columns of stitches. This type of knitting can be performed on a conventional yarn over knitting machine, for example, a Karl Mayer HKS3 MSU warp knitting machine with three guide bars or an HKS4 with four guide bars, or Karl Mayer warp or Raschel knitting machines. Preferably, the gauge of the knitting machine, in particular a weft, warp, or Rachel type, is greater than or equal to 24 needles per inch, more preferably greater than or equal to 32 needles per inch, and preferably at most 40 needles per inch.
[0027] Preferably, yarn A and / or yarn B is / are each knitted in an atlas weave comprising open and closed stitches, extending over at least two and at most eight columns of stitches, more preferably extending over at least two and at most six columns of stitches, preferably extending over at least two and at most four columns of stitches, in particular extending over three or four columns of stitches. Preferably, composite yarn C forms knitted stitches, in particular closed stitches, extending over at least three columns of stitches, more preferably over at least four columns of stitches, in particular over at most eight columns of stitches.
[0028] Preferably, the composite yarn C forms knitted stitches extending over a number of stitch columns greater than the number of stitch columns over which yarn A and / or yarn B extend(s) to form (each) knitted stitches as well.
[0029] Preferably, the first and / or second side of the yarn over knit is / are brushed, and possibly shaved.
[0030] This feature improves the softness to the touch with the skin of the treated face as well as its absorption.
[0031] In this text, "warp-knitted" refers to a type of knitting in which the stitches are formed in the warp direction, specifically known as warp knitted textile in English. This is in contrast to weft knitted textile, in which the stitches are formed in the weft direction, specifically known as weft knitted textile in English.
[0032] In this text, chain stitches are understood to be stitches formed by a thread and extending over a single column of stitches.
[0033] In this text, knitted stitches are understood to be stitches formed by a yarn and extending over at least two columns of stitches, said stitches being able to be closed or open or in an arrangement of open and closed stitches (e.g., atlas weave).
[0034] In this context, a weft yarn is understood to be a yarn inserted in the weft direction over at least two columns of stitches, possibly across substantially the entire width of the knitted fabric. This weft yarn may extend in the weft direction over each row of stitches (in which case the weft yarn is advantageously substantially parallel to a row of stitches) or extend in the weft direction every at least two rows of stitches (in particular, the weft yarn then extends diagonally to the direction of the rows of stitches in the wefted knit). Specifically, this weft yarn does not form stitches.
[0035] Knitting with yarn overs
[0036] Preferably, the yarn over knitting comprises first and second opposite faces, in particular yarns A and B are knitted on the first face and composite yarn C is knitted on the second face.
[0037] Preferably, the yarn over knitting comprises columns of stitches extending in the longitudinal direction of the knitting (L), and rows of stitches extending in the transverse direction (T) of the knitting, in particular substantially perpendicular to the longitudinal direction (L).
[0038] Preferably, the knit with yarn overs at a surface mass greater than or equal to 120g / m 2 preferably greater than or equal to 140 g / m² 2 , for example 180 g / m 2 at + / - 30 g / m 2 Preferably, the knitted fabric with yarn overs at a surface mass less than or equal to 300 g / m 2 preferably less than or equal to 250 g / m² 2 , in particular less than or equal to 200 g / m 2 .
[0039] Preferably, yarn over knitting comprises a number of rows of stitches per inch greater than or equal to 30, even more preferably greater than or equal to 40, for example 53 at + / -10.
[0040] Preferably, yarn over knitting comprises a number of rows of stitches per inch less than or equal to 100, and even more preferably less than or equal to 70.
[0041] Preferably, the yarn over knitting comprises a number of columns of stitches per inch greater than or equal to 30, again preferably greater than or equal to 40, for example 43 at + / -10.
[0042] Preferably, the yarn over knitting comprises a number of columns of stitches per inch less than or equal to 100, more preferably less than or equal to 70, more preferably less than or equal to 60.
[0043] In this text, one inch equals 25.4 mm.
[0044] Preferably, the yarn over knit has a thickness (measured as the distance between its first and second faces) of 5 mm or less, more preferably 3 mm or less, preferably 2 mm or less, for example 1.5 mm or less. Preferably, the yarn over knit has a thickness of 0.3 mm or more.
[0045] Preferably, yarn A and / or yarn B each take / com are formed of filaments, in particular are formed of filaments, having a linear mass greater than or equal to 1 dtex per filament, in particular greater than or equal to 1.5 dtex per filament, more particularly greater than or equal to 2 dtex per filament, for example from 3 dtex to + / - 0.5 dtex per filament.
[0046] Preferably, yarn A and / or yarn B and / or composite yarn C is / are each a multifilament yarn made of polyester(s), in particular polyethylene terephthalate, polybutylene terephthalate, or a combination thereof.
[0047] Preferably, yarn A and / or yarn B have (each) a linear mass greater than or equal to 15 dtex, in particular greater than or equal to 25 dtex, for example from 44 dtex to + / - 10 dtex.
[0048] Preferably, yarn A and / or yarn B has (each) a linear mass less than or equal to 150 dtex, more preferably less than or equal to 100 dtex, in particular less than or equal to 75 dtex, more particularly less than or equal to 50 dtex.
[0049] Preferably, wire A and / or wire B each comprise at least 6 filaments, preferably at least 10 filaments.
[0050] Preferably, wire A and / or wire B each comprise at most 30 filaments, even more preferably at most 20 filaments. In a preferred example, wire A and / or wire B each comprise 12 filaments at + / -4 filaments.
[0051] Advantageously, yarn A is knitted in opposition to yarn B.
[0052] We understand in this text by the yarn B is knitted in opposition to yarn A that the mesh bar supporting yarn B works (i.e. knits) in a direction opposite to the working direction (i.e. knitting direction) of the mesh bar supporting yarn A.
[0053] In this text, a mesh or guide bar is equivalent to a loop bar. For example, if the mesh bar supporting yarn B works from right to left (or from one edge to the other edge of the knitted fabric with yarn overs), the mesh bar supporting yarn A then works from left to right (or from the second edge to the first edge of the knitted fabric with yarn overs).
[0054] This arrangement improves the balance of the bond between yarns A and B, and prevents problems with straight grain, in particular preventing the yarn over from twisting. The dimensional stability of the knit is thus improved.
[0055] Advantageously, yarn A is knitted according to a stitch pattern that is the reverse of the stitch pattern of yarn B.
[0056] In particular, as can be seen in Figure 1 below, the stitch pattern, or knitting pattern, of yarn A is symmetrical to the stitch pattern, or knitting pattern, of yarn B with respect to a longitudinal axis passing between said stitch patterns, said longitudinal axis being parallel to a column of stitches or column of needles.
[0057] Preferably, the knitted fabric comprises more than 70% by mass of its total mass of synthetic material(s), in particular polyester(s), more specifically selected from polyethylene terephthalate, polybutylene terephthalate, or a combination thereof. Preferably, the knitted fabric does not contain any cellulosic material (e.g., cotton, viscose, etc.).
[0058] Cellulosic material is understood to mean any natural, artificial or regenerated cellulosic material, or a combination thereof.
[0059] Composite yarn C
[0060] Preferably, composite yarn C has a linear density greater than or equal to 30 dtex, in particular greater than or equal to 50 dtex, and more particularly greater than or equal to 60 dtex. Preferably, composite yarn C has a linear density less than or equal to 200 dtex, more preferably less than or equal to 150 dtex, and in particular less than or equal to 100 dtex.
[0061] In a preferred example, composite yarn C has a linear density of 89 dtex + / - 20 dtex. Preferably, composite yarn C comprises at least 50 filaments, including microfilaments, more preferably at least 100 filaments, including microfilaments, and preferably at least 125 filaments, including microfilaments. Preferably, composite yarn C comprises at most 200 filaments, including microfilaments, and more preferably at most 180 filaments, including microfilaments.
[0062] In a preferred example, composite wire C comprises 155 filaments including microfilaments, at + / - 20 filaments and / or microfilaments.
[0063] Preferably, the mass fraction of wire Cl in composite wire C is greater than or equal to 20%, and even more preferably greater than or equal to 30%.
[0064] Preferably, the mass fraction of wire Cl in composite wire C is less than or equal to 80%, more preferably less than or equal to 60%, preferably less than or equal to 45%.
[0065] For example, the mass fraction of the Cl wire in the composite C wire is 37% at + / - 10%, specifically at + / - 5%.
[0066] Preferably, the mass fraction of wire C2 in composite wire C is greater than or equal to 40%, more preferably greater than or equal to 50%, more preferably greater than or equal to 60%.
[0067] Preferably, the mass fraction of wire C2 in composite wire C is less than or equal to 80%, more preferably less than or equal to 70%.
[0068] For example, the mass fraction of the C2 yarn in the composite yarn C is 62% at + / - 10%, specifically at + / - 5%.
[0069] Preferably, the yarn Cl comprises filaments, in particular is formed of filaments, having a linear mass greater than or equal to 1 dtex per filament, in particular greater than or equal to 1.5 dtex per filament, more particularly greater than or equal to 2 dtex per filament, for example from 2.5 dtex to + / - 0.5 dtex per filament.
[0070] Preferably, the Cl yarn has a linear density greater than or equal to 15 dtex, in particular greater than or equal to 25 dtex.
[0071] For example, the Cl yarn has a linear mass of 33 dtex at + / - 10 dtex.
[0072] Preferably, the Cl yarn has a linear mass less than or equal to 150 dtex, more preferably less than or equal to 100 dtex, in particular less than or equal to 75 dtex, more particularly less than or equal to 50 dtex.
[0073] Preferably, the Cl thread comprises at least 6 filaments, even more preferably at least 10 filaments.
[0074] Preferably, the Cl thread comprises at most 30 filaments, even more preferably at most 20 filaments. For example, the Cl thread comprises 12 filaments + / - 4 filaments.
[0075] Preferably, the C2 yarn comprises (micro)filaments, in particular is formed of (micro)filaments, having a linear mass less than 1 dtex per filament, in particular less than or equal to 0.80 dtex per filament, more particularly less than or equal to 0.60 dtex per filament. Preferably, the C2 yarn comprises (micro)filaments, in particular is formed of (micro)filaments, having a linear mass greater than or equal to 0.08 dtex per filament, in particular greater than or equal to 0.10 dtex per filament, more particularly greater than or equal to 0.20 dtex.
[0076] For example, the C2 yarn includes microfilaments, in particular is made up of microfilaments, from 0.35 dtex to + / - 0.20 dtex per microfilament.
[0077] Preferably, the C2 yarn has a linear mass greater than or equal to 15 dtex, in particular greater than or equal to 25 dtex, more particularly greater than or equal to 40 dtex.
[0078] Preferably, the C2 yarn has a linear mass less than or equal to 150 dtex, more preferably less than or equal to 100 dtex, in particular less than or equal to 75 dtex, more particularly less than or equal to 60 dtex.
[0079] For example, C2 yarn has a linear density of 50 dtex at + / - 10 dtex.
[0080] Preferably, the C2 wire comprises at least 50 (micro)filaments, more preferably at least 80 (micro)filaments, preferably at least 100 (micro)filaments, and even more preferably at least 130 (micro)filaments. Preferably, the C2 wire comprises at most 250 (micro)filaments, more preferably at most 200 (micro)filaments, and preferably at most 180 (micro)filaments.
[0081] For example, C2 wire comprises 145 (micro)filaments at + / - 20 (micro)filaments.
[0082] Preferably, yarn Cl and / or yarn C2 is / are each a multifilament yarn made of polyester(s), in particular polyethylene terephthalate, polybutylene terephthalate, or a combination thereof.
[0083] Preferably, the composite yarn C has a breaking tenacity greater than or equal to 2 cN / dtex, more preferably greater than or equal to 3 cN / dtex.
[0084] Preferably, the composite yarn C (especially before knitting) has an elongation at break greater than or equal to 15%, and even more preferably greater than or equal to 20%.
[0085] Preferably, the composite yarn C (especially before knitting) has an elongation at break of less than or equal to 80%, and even more preferably less than or equal to 60%.
[0086] In a preferred example, composite yarn C (specifically before knitting) has an elongation at break of 27% + / - 5%. Tenacity at break and elongation at break are preferably measured according to GB / T 14344-2008.
[0087] In a preferred example, the composite yarn C (especially before knitting) has a degree of filament interlacing greater than or equal to 80, preferably greater than or equal to 100, especially 117 + / - 20, still preferably less than or equal to 250. The degree of interlacing is preferably measured with the standard FZ / T 50001-2016.
[0088] Measurement methods The mass fraction of a part [a] in an element A is calculated by dividing the mass of [a] by the total mass of A * 100.
[0089] The linear density (dtex, denier) of a yarn or (micro)filament can be measured using ISO 2060:1994, entitled "Textiles - Yarn from packages - Determination of linear density (mass per unit length) using the skein method." The linear density can be calculated on a yarn before knitting, or by unraveling a specific length of that yarn.
[0090] The surface mass can be calculated using the ISO 3801:1977 standard entitled "Textiles - Fabrics - Determination of mass per unit length and mass per unit area".
[0091] The length of yarn absorbed in the knit with dropped stitches can be determined by the standard NF EN 14970, April 2006, entitled "Textiles - Knitted fabrics - Determination of the absorbed length and linear mass of yarn in knitted fabrics with picked stitches".
[0092] The number of columns and / or rows of stitches in the yarn-knitted fabric can be determined by the standard NF EN 14971, April 2006, entitled "Textiles - Knitted fabrics - Determination of the number of stitches per unit length and unit area" or by counting the number of rows and / or columns of stitches per centimeter on a yarn-knitted fabric at rest (i.e. on which no elongation is exerted) at room temperature (between 20°C and 30°C).
[0093] The thickness of the knitted fabric can be measured using ISO 5084:1996 "Textiles - Determination of the thickness of textiles and textile products".
[0094] In one variant, the multifilament yarn Cl comprises filaments each having a linear mass greater than or equal to 1 dtex which are made of polyester(s) and the multifilament yarn C2 comprises filaments each having a linear mass less than 1 dtex which are made of polyester(s).
[0095] Advantageously, yarns A and B also include polyester filament(s).
[0096] Advantageously, the microfilaments are made of polyester(s) and not polyamide(s). The knitted fabric with discarded stitches is therefore polyester-based, making it easier to recycle.
[0097] In one variant, multifilament yarn A forms closed and open knitted stitches extending over at least two and at most five columns of stitches, multifilament yarn B forms closed and open knitted stitches extending over at least two and at most five columns of stitches, in particular yarn B is knitted in opposition to yarn A, and composite yarn C forms knitted stitches extending over at least three columns of stitches, and in particular forming a lap every m rows of stitches, m being an integer between 1 and 3, preferably m is equal to 1 or 2, even more preferably m is equal to 1. Advantageously, yarns A and B are knitted in an atlas weave, forming open and closed stitches extending over at least two and at most five columns of stitches.
[0098] Advantageously, yarn A and / or yarn B form(s) (each) a return (or lap) every n rows of stitches, n being an integer between 2 and 8, especially between 2 and 6, especially between 2 and 4.
[0099] In this text, a "return" (or "lap") refers to a change in the knitting direction of a yarn. For example, a yarn is knitted so that it extends over n columns of stitches in a given direction Fl (for example, from the first edge to the second edge of the knitting, or from left to right) and over p rows of stitches, then forms a return to be knitted in a direction F2, opposite to Fl (for example, from the second edge to the first edge of the knitting, or from right to left), also over n columns of stitches and over p rows of stitches, where n and p are, for example, three. In this example, there is a return every three rows of stitches.
[0100] This arrangement is preferred to obtain a knitted fabric with yarn overs that has good dimensional stability, and has a large amount of composite yarn C absorbed on the wrong side or second side.
[0101] Yarns A and B also provide good dimensional stability and balance the surface mass of the knitted fabric with yarn overs.
[0102] In one variant, multifilament yarn A comprises filaments each having a linear mass greater than or equal to 1 dtex, and optionally multifilament yarn B comprises filaments each having a linear mass greater than or equal to 1 dtex.
[0103] Yarns A and B are advantageously "classic" yarns contributing to the mechanical properties of the yarn over knit, and allow for balancing the mass fraction of microfilaments.
[0104] In one variant, the multifilamentary yarn C2 comprises, in particular is formed by, filaments each having a linear mass greater than or equal to 0.1 dtex.
[0105] Advantageously, it has been determined that microfilaments with a linear mass between 0.1 dtex and less than 1 dtex provide good mechanical properties for drop knitting, sufficient water absorption, and facilitate the knitting of yarn C.
[0106] In one variant, the knitted textile with dropped stitches comprises a mass fraction of filaments, each having a linear mass less than 1 dtex, greater than or equal to 30% and less than or equal to 70%, preferably greater than or equal to 40% and less than or equal to 60%, again preferably from 50% to + / - 5%.
[0107] Advantageously, it has been observed that the drop-stitch knit provides good water absorption properties in this range, particularly due to its knit structure, compared to a fabric comprising a higher quantity of microfilaments and polyamide (which absorbs more water than polyester). In one variant, the mass fraction of Cl yarn in the composite yarn C is greater than or equal to 20% and less than or equal to 60% when the mass fraction of C2 yarn in yarn C is greater than or equal to 40% and less than or equal to 80%, preferably the mass fraction of Cl yarn in yarn C is greater than or equal to 30% and less than or equal to 40% when the mass fraction of C2 yarn in yarn C is greater than or equal to 50% and less than or equal to 70%.It has been observed that this ratio allows for good water absorption performance, while preserving a knitable C yarn, and providing good mechanical resistance to the yarn over knit.
[0108] In one variant, the mass fraction of composite yarn C in the yarn over knit is greater than or equal to 60%, in particular greater than or equal to 70%.
[0109] In a preferred example, the mass fraction of composite yarn C in the yarn over knit is 78% to within + / - 10%, specifically to within + / - 5%.
[0110] In one variant, the mass fraction of yarn A and yarn B in the yarn over knit is less than or equal to 40%, preferably less than or equal to 30%.
[0111] In a preferred example, the mass fraction of yarn A and yarn B in the yarn over knit is 22% at + / - 10%, specifically at + / - 5%.
[0112] These mass fractions in yarns A, B and C depend on the linear density of the yarns and the knitting weave (Quant on the amount of yarn absorbed).
[0113] Advantageously, the yarn-knitted fabric comprises a mass fraction of polyester filament(s) greater than or equal to 50%, in particular greater than or equal to 60%, 70%, 80%, 90%, or 95%, said filaments being selected from the filaments of multifilament yarn A, multifilament yarn B, or multifilament yarn C, or a combination thereof, in particular each of yarns A, B, and C comprising polyester filament(s). It has been determined that these proportions allow for good results in terms of water absorption, mechanical strength, ease of knitting, and dimensional stability.
[0114] In one variant, the yarn over knit has an elongation under a force of 15N measured in the direction of the stitch columns and / or stitch rows less than or equal to 15%, preferably less than or equal to 10%.
[0115] Preferably, the knitted fabric with dropped stitches has an elongation under a force of 15N of the order of 8.6% to within + / - 5% in the direction of the stitch columns.
[0116] Preferably, the yarn over knit has an elongation under a force of 15N of the order of 9.5% to + / - 5% in the direction of the rows of stitches.
[0117] Advantageously, the knit has very little elongation, resulting in good dimensional stability during use (including when wet) and washing. In one variant, the multifilament yarn Cl is a drawn (DY) or fully drawn (FDY) yarn. DY stands for Drawn Yarn and DY for Full Drawn Yarn.
[0118] In one variant, the C2 multifilament yarn is a drawn and textured (DTY) yarn.
[0119] DTY stands for Drawn Textured Yarn.
[0120] It has been found that this combination of C2 (DTY) yarn with Cl (DY) or FDY yarn produces a composite C yarn with loft, thus adding softness to yarn-knitted projects. Furthermore, the microfilaments undergo shrinkage during the manufacturing process, increasing their volume and providing a greater surface area for water absorption.
[0121] In one variant, yarn A and / or yarn B is / are each a fully drawn multifilament yarn (FDY), in particular flat.
[0122] In one variant, the knitted textile with dropped stitches has a dimensional shrinkage of less than or equal to 10%, preferably less than or equal to 5%, even more preferably less than or equal to 4%, in the direction of the stitch columns, in particular after tumble drying with an applied temperature of about 20°C, 65% relative humidity, for 30 minutes, or measured with ISO 5077:2007.
[0123] For example, the dimensional shrinkage is on the order of 2% in the chain direction at + / - 2%.
[0124] In one variant, the knitted textile with dropped stitches has a dimensional shrinkage of less than or equal to 10%, preferably less than or equal to 5%, even more preferably less than or equal to 4%, in the direction of the rows of stitches, in particular after tumble drying with an applied temperature of about 20°C, 65% relative humidity, for 30 minutes, or measured with ISO 5077:2007.
[0125] For example, the dimensional shrinkage is on the order of 3% in the direction of the rows of mesh at + / - 2%.
[0126] The present invention relates, according to a second aspect, to a method for manufacturing a wiping article, in particular according to any one of the embodiments of a first aspect, comprising the following steps: - a step (i) of knitting an intermediate woven textile comprising columns of stitches and rows of stitches, said woven textile comprising: - a multifilament yarn A, a multifilament yarn B, and a composite yarn C, knitted respectively with a loop bar A, a loop bar B, and a loop bar C, such that each of the loop bars A and B forms knitted stitches extending over at least two columns of stitches, and that the loop bar C forms knitted stitches extending over at least two columns of stitches or weft loops extending over at least two columns of stitches,or - a multifilament yarn A and a multifilament yarn B knitted respectively with a loop bar A and a loop bar B, each forming chain stitches and / or knitted stitches extending over at least two columns of stitches, and a composite yarn C knitted with a loop bar C so as to form weft loops extending substantially over all the columns of stitches (i.e., over the entire width of the yarn over knit), and said knitted composite yarn C comprises a multifilament yarn C1 comprising filaments each having a linear density greater than or equal to 1 dtex and a multifilament yarn C2 comprising filaments each having a linear density less than 1 dtex, said composite yarn C has a boiling water shrinkage greater than or equal to 20% and less than or equal to 60%, in particular less than or equal to 50%, said intermediate yarn over knit textile obtained in step (i) has a surface density M1,and said process further comprises: - a heat treatment step (ii), in particular a heating step (ii), of said intermediate open-knit textile so as to obtain the dimensional shrinkage of said at least one composite yarn C, the open-knit textile obtained in step (ii) having a surface mass M2 greater than M1, M2 being greater than or equal to 100 g / m², 2 , and the knitted textile with dropped stitches obtained in step (ii) has a mass fraction of polyester filament(s) greater than or equal to 50%.
[0127] Advantageously, the said manufacturing process for the knitted fabric does not include a step of treating the knitted fabric with soda or acid.
[0128] Advantageously, yarns A and B are "classic" multifilament yarns in the prior art and do not exhibit any particular boiling water shrinkage, i.e. different from that usually exhibited by multifilament yarns in polyester(s).
[0129] Preferably, composite wire C has a boiling water shrinkage greater than or equal to 30% and less than or equal to 45%, for example in the range of 35% to + / - 5%.
[0130] Boiling water shrinkage is preferably measured with the DIN 14621 standard, dated March 2006, "Textiles - Multifilaments - Test methods for the curl of textured multifilament yarns and the thermal shrinkage of flat and textured yarns - German version EN 14621:2005".
[0131] Preferably, the heat treatment step (ii) includes heating the yarn-knitted fabric, in particular when impregnated with water, to a temperature of 100°C or higher, for example 130°C at + / - 20°C, in particular for at least 30 seconds.
[0132] Heat treatment (ii) can be carried out during the dyeing of the yarn-knitted fabric. The manufacturing process may include a drying step after heat treatment step (ii), in particular dyeing the yarn-knitted fabric, more specifically drying at a temperature of 140°C or higher, preferably in the range of 170°C ± 30°C. This drying step may thus also be a heat-setting step. Preferably, the process includes, after heat treatment step (ii), in particular after dyeing and / or drying (or heat-setting), a brushing step (iii) of the first and / or second face of the yarn-knitted fabric.
[0133] Preferably, the process includes, after the scraping step (iii), a shaving step (iv) of the first face and / or the second face of the knitted yarn.
[0134] Scraping includes scraping the faces of the yarn-knitted fabric with rollers fitted with needles or points, and shearing includes cutting the scraped filaments on the surface of the yarn-knitted fabric.
[0135] The scraping and shearing steps are known as such to those skilled in the art, for example, in the manufacture of so-called fleece textiles from synthetic materials. Their application to the drop-stitch knit according to the invention improves softness against the skin, drape, and gives loft to the drop-stitch knit, which does not have prominent loops like a looped terry cloth.
[0136] It has also been observed that microfilaments are more easily ejected from the knitted fabric, thus improving water absorption capacity.
[0137] Preferably, the loop bar C knits on the second side, or wrong side, of the intermediate yarn over knit, and the loop bar A and / or loop bar B knit(s) on the first side, or right side, of the intermediate yarn over knit.
[0138] In a preferred embodiment, each of the loop bars A and B forms knitted stitches extending over at least two columns of stitches, in particular over at most eight columns of stitches, more particularly over at most six columns of stitches, and the loop bar C forms knitted stitches extending over at least two columns of stitches, in particular over at least three columns of stitches, more particularly over at most eight or six columns of stitches.
[0139] In particular, the loop bar C forms knitted stitches extending over a number of stitch columns greater than the number of stitch columns over which the loop bar A and / or the loop bar B extend(s) by forming knitted stitches.
[0140] In another embodiment, loop bars A and B each form knitted stitches extending over at least two columns of stitches, in particular over at least three columns of stitches and at most over eight or six columns of stitches, and loop bar C forms weft yarn overs extending substantially over all the columns of stitches (i.e., over the entire width of the yarn over work). In another embodiment, loop bar A forms knitted stitches extending over at least two columns of stitches, in particular over at least three columns of stitches and at most over eight or six columns of stitches, and loop bar B forms chain stitches, and loop bar C forms weft yarn overs extending substantially over all the columns of stitches (i.e., over the entire width of the yarn over work).
[0141] In one variant, the loop bar A forms closed and open knitted stitches extending over at least two columns of stitches and at most five columns of stitches, the loop bar B forms closed and open knitted stitches extending over at least two columns of stitches and at most five columns of stitches, the loop bar C forms knitted stitches extending over at least three columns of stitches, and forming in particular a return (or laps in English) every m rows of stitches, m being an integer between 1 and 3, preferably m is equal to 1 or 2, even more preferably m is equal to 1.
[0142] Preferably, the loop bar A, or B, is threaded with a partial threading: 1 solid and 1 open. Preferably, the loop bar B, or A, is threaded with a partial threading: 1 open and 1 solid (in particular opposite to the threading of bar A).
[0143] Preferably, the C slotted bar is fully inserted.
[0144] Preferably, the composite yarn C forms at least one closed stitch on each row of stitches in the yarn over knitting.
[0145] This arrangement allows for a stippled effect.
[0146] In one variant, the length of the composite yarn C absorbed in the intermediate knitted textile with dropped stitches obtained in step (i) is Lfa C, the length of yarn A or yarn B absorbed in the knitted textile with dropped stitches obtained in step (i) is Lfa A or Lfa B, and Lfa C is greater than Lfa A or Lfa B, preferably Lfa C is greater than or equal to 1.3 * Lfa A or LfB, more preferably Lfa C is greater than or equal to 1.5 * Lfa A or LfB, preferably Lfa C is greater than or equal to 1.7 * Lfa A or LfB.
[0147] This arrangement allows the composite yarn C to fully exert its shrinkage and thus increase the surface mass M2 of the knitted yarn.
[0148] This arrangement also facilitates the knitting of microfilaments since the composite yarn C is knitted with less tension.
[0149] Advantageously, the Lfa corresponds to the run-in value (mm / rack) indicated by the knitting machine.
[0150] In one variant, multifilament yarn Cl is a drawn (DY) or fully drawn (FDY) yarn, and multifilament yarn C2 is a drawn and textured (DTY) yarn.
[0151] Preferably, wire C2 has a boiling water shrinkage greater than the boiling water shrinkage of wire Cl.
[0152] This difference in shrinkage behavior between the two wires Cl and C2 allows the composite wire C to gain volume.
[0153] The difference in shrinkage is obtained by adjusting the drawing rates during yarn manufacturing. This arrangement is intrinsically known to the person skilled in the craft. In one variant, the knitted textile with dropped stitches obtained in step (ii) has a first face and a second face substantially opposite to the first face, and said process includes a step of brushing at least one of the first and second faces.
[0154] The present invention also relates, according to a third aspect, to a water-absorbing body wiping article, such as a bath towel, which can be obtained by the manufacturing process of a wiping article according to a second aspect of the invention.
[0155] The features and embodiment variants with reference to the first aspect of the invention can be combined independently of each other, and with any of the embodiment variants with reference to the second aspect of the invention and / or the third aspect of the invention.
[0156] Description of the drawings
[0157] The invention will be better understood upon reading the following description of embodiments of the invention given by way of non-limiting examples, with reference to the accompanying drawings, in which:
[0158] [Fig. 1] Figure 1 is a schematic perspective representation of a first example of a knitting weave of a knitted fabric with dropped stitches according to the invention;
[0159] [Fig. 2] Figure 2 is a top-view microscope photograph of a portion of an example of a composite wire C according to the invention before any thermal shrinkage step;
[0160] [Fig. 3] Figure 3 is a top-view microscope photograph of a portion of an example of a composite wire C according to the invention after a thermal shrinkage step;
[0161] [Fig. 4] Figure 4 is a table showing various parameters measured on a first example of a wiping article comprising the first example of a knitted fabric according to the invention (EX1) compared to a comparative wiping article comprising a fabric (EXC1).
[0162] Description of the implementation methods
[0163] The knitting weave 10 shown in Figure 1 for knitting a first example of a yarn over knit 100 according to the invention comprises three loop bars A, B, and C that follow the knitting patterns 12, 14, and 16, respectively. The knitting patterns 12, 14, and 16 are thus repeated across the entire width and length of the yarn over knit 100. The loop bars A (12) and B (14) are threaded partially with yarn A (13) and yarn B (15), respectively: one full and one empty. The loop bar C is threaded completely with a composite yarn C (17).
[0164] In this specific example, the loop bar A forms closed knit stitches 22 and open knit stitches 24 with yarn A (13) extending over three columns of stitches referenced Cl, C2 and C3; the loop bar B forms closed knit stitches 26 and open knit stitches 28 with yarn B (15) extending over three columns of stitches referenced C5, C6 and C7; the loop bar C forms closed knit stitches 30 extending over four columns of stitches referenced C9, C10, C11 and C12.
[0165] Yarns A (13) and B (15) are knitted in opposition. It can be observed that knitting pattern 12 is also symmetrical to knitting pattern 14 along the longitudinal axis L passing through the column of needles C4.
[0166] Yarn A (13) is knitted alternately in the Fl and F2 directions, and yarn B (15) is knitted alternately opposite yarn A (13) in the F2 and Fl directions.
[0167] Yarn A (13) forms a return every three rows of stitches corresponding to the change from direction Fl to F2 or vice versa. Yarn A (13) is thus knitted in the same direction Fl for three rows of stitches RI to R3, then is knitted in the opposite direction F2 for the three rows of stitches R3 to R5. A symmetrical knitting motion is observed for yarn B (15) with a return every three rows of stitches.
[0168] Yarn C (17) forms portions of long loops over four columns of stitches, and forms closed stitches 30 over all rows of stitches or forms closed stitches over every two rows of stitches. Advantageously, it is observed that composite yarn C forms a loop over every row of stitches, and therefore forms stitches, here closed, over all rows of stitches.
[0169] In this specific example, yarns A and B are 45 dtex multifilament yarns with 12 filaments (3.75 dtex per filament), of the DTY type. Composite yarn C has a boiling water shrinkage rate of 35% + / - 3%. Yarn C is an 89 dtex multifilament yarn with 156 filaments, specifically comprising a 33.33 dtex C11 yarn with 12 filaments (2.77 dtex per filament) and a 55.55 dtex C2 yarn with 156 filaments (0.35 dtex per filament). Yarns A, B, and C are each made of polyethylene terephthalate. Yarn Cl represents approximately 37.5% by mass of yarn C and yarn C2 represents approximately 62.5% by mass of yarn C. Yarns A and B represent approximately 22% by mass of the 100-stitch knit, and yarn C represents approximately 78% by mass of the 100-stitch knit. Yarn Cl is of type DTY and yarn C2 is of type POY or DTY.The 100-threaded knit thus comprises 48.75% by mass of microfilaments from yarn C2 and 51.25% of filaments with a fineness of 1 dtex or more from yarns A and B and yarn Cl.
[0170] Figure 2 shows a top-view photograph of a portion of wire C before any removal step. It can be seen that wire 17 comprises two different structures: structure 17a corresponds to wire C2 and structure 17b corresponds to wire Cl.
[0171] Figure 3 shows a top-view photograph of a portion of yarn C after a thermal shrinkage step. Greater shrinkage is observed in yarn Cl (17b) compared to yarn C2 (17a), thus generating more interlacing points in yarn C2. This arrangement creates zones within the microfilaments that promote water absorption and improve the dimensional stability of the knit fabric. Figures 2 and 3 show the structures of yarns Cl and C2, which are substantially separated for photographic purposes; in practice, yarns Cl and C2 are intertwined.
[0172] Advantageously, the previously described 100-stitch knit fabric, obtained from the knitting machine in an intermediate form, undergoes a dyeing step during which it is heat-treated with hot water at a temperature of approximately 130 °C for at least 60 seconds. The intermediate 100-stitch knit fabric then undergoes a drying step at 170 °C with a speed of 20 m / min on a reed. Advantageously, after the heat treatment step (ii), the 100-stitch knit fabric undergoes a brushing step and a shearing step. The resulting 100-stitch knit fabric has 42.5 rows of stitches per inch, 53 columns of stitches per inch, a thickness of 0.91 mm, and a basis weight of 189.7 g / m². 2 (corresponding to example EX1 in the table in figure 4).
[0173] The table also includes information from a comparative example EXC1, corresponding to a woven fabric comprising a polyethylene terephthalate multifilament yarn of 83.3 dtex for 72 filaments (i.e., 1.15 dtex / filament), and a multifilament yarn comprising microfilaments (85% PET and 15% PA 66, 177.8 dtex for 576 filaments, i.e., 0.30 dtex / filament). The microfilaments are formed by a sodium hydroxide treatment applied to the fabric (i.e., after weaving). The fabric comprises 62.5% by mass of 0.15 dtex microfilaments per filament and 37.5% of 1.2 dtex filaments (warp: 75 denier yarns with 72 filaments, and weft: 160 denier yarns with 72 filaments, each filament comprising 16 "islands"; after treatment with sodium hydroxide, this theoretically represents 1152 filaments). The fabric also underwent thermal shrinkage, followed by a scraping and shearing stage.We observe better water retention for EXl than for EXCl, and therefore a better water retention rate for EXl compared to EXCl. The retention rate is also more reproducible for EXl than for EXCl. Surprisingly, the retention rate of EXl according to the invention is improved by 6.8% even though the mass fraction of microfilaments is 28% lower compared to that of EXCl (48.5% versus 62.5%), and this with microfilaments in EXl having a linear density twice that of the microfilaments in EXCl (0.35 dtex versus 0.15 dtex).
[0174] The knitted fabric according to the invention thus makes it possible to obtain very good water absorption performance, to dry quickly, to be dimensionally stable during washing and use, not to implement treatment with soda, and to be based on polyester(s).
Claims
DEMANDS 1. A water-absorbing body-wiping article, such as a bath towel, characterized in that said article comprises a knitted textile with drop stitches (100) comprising columns of stitches and rows of stitches, in that said knitted textile with drop stitches (100) comprises: - a multifilament yarn A (13), and a multifilament yarn B (15), each of which is knitted so as to form knitted stitches (22, 24, 26, 28) extending over at least two columns of stitches, and a composite yarn C (17) knitted so as to extend over at least two columns of stitches, or - a multifilament yarn A, and a multifilament yarn B, each knitted to form chain stitches, or knitted stitches extending over at least two stitch columns, and a composite yarn C knitted to form weft loops extending substantially over all stitch columns, and in that the knitted composite yarn C (17) comprises a multifilament yarn C1 comprising filaments each having a linear density greater than or equal to 1 dtex and a multifilament yarn C2 comprising filaments each having a linear density less than 1 dtex, and in that the knitted textile with looped stitches (100) has a basis density greater than or equal to 100 g / m² 2 and comprises polyester filaments of which the mass fraction in said knitted textile with discarded stitches is greater than or equal to 50%.
2. Water-absorbing body wiping article according to claim 1, characterized in that the multifilament yarn Cl comprises filaments each having a linear mass greater than or equal to 1 dtex which are made of polyester(s) and the multifilament yarn C2 comprises filaments each having a linear mass less than 1 dtex which are made of polyester(s).
3. A water-absorbing body wiping article according to either of claims 1 and 2, characterized in that the multifilament yarn A (13) forms closed (22) and open (24) knitted stitches extending over at least two stitch columns (C1, C2, C3) and at most five stitch columns (C1, C2, C3), the multifilament yarn B (15) forms closed (26) and open (28) knitted stitches extending over at least two (C5, C6, C7) and at most five (C5, C6, C7) stitch columns, in particular yarn B (15) is knitted in opposition to yarn A (13), and the composite yarn C (17) forms knitted stitches (30) extending over at least three stitch columns (C9,C10,C11,C12) and forming a return every m rows of stitches, m being an integer between 1 and 3.
4. Water-absorbing body wiping article according to any one of claims 1 to 3, characterized in that the multifilament yarn A (13) comprises filaments each having a linear mass greater than or equal to 1 dtex, and optionally the multifilament yarn B (15) comprises filaments each having a linear mass greater than or equal to 1 dtex.
5. Water-absorbing body wiping article according to any one of claims 1 to 4, characterized in that the multifilament yarn C2 comprises filaments each having a linear mass greater than or equal to 0.1 dtex.
6. Water-absorbing body wiping article according to any one of claims 1 to 5, characterized in that the open-knit textile (100) comprises a mass fraction of filaments, each having a linear mass less than 1 dtex, greater than or equal to 30% and less than or equal to 70%.
7. Water-absorbing body wiping article according to any one of claims 1 to 6, characterized in that the mass fraction of Cl yarn in the composite yarn C (17) varies from 20% to 60% when the mass fraction of C2 yarn in the composite yarn C (17) varies from 40% to 80%.
8. Water-absorbing body wiping article according to any one of claims 1 to 7, characterized in that the mass fraction of the composite yarn C (17) in the yarn-knitted fabric is greater than or equal to 60%, in particular greater than or equal to 70%.
9. Water-absorbing body wiping article according to any one of claims 1 to 8, characterized in that the dropped-stitch knitted textile (100) has an elongation at break measured in the direction of the stitch columns and / or stitch rows less than or equal to 10%.
10. Water-absorbing body wiping article according to any one of claims 1 to 9, characterized in that the multifilament yarn Cl is a drawn (DY) or fully drawn (FDY) yarn.
11. Water-absorbing body wiping article according to any one of claims 1 to 10, characterized in that the multifilamentary yarn C2 is a drawn and textured yarn (DTY).
12. A method for manufacturing a wiping article, in particular according to any one of claims 1 to 11, characterized in that said method comprises the following steps: - a step (i) of knitting an intermediate drop-stitch knit textile (100) comprising stitch columns and stitch rows, said drop-stitch knit textile comprising: - a multifilament yarn A (13), a multifilament yarn B (15), and a composite yarn C (17), knitted respectively with a loop bar A (12), a loop bar B (14), and a loop bar C (16), such that each of the loop bars A (12) and B (14) forms knitted stitches (22, 24, 26, 28) extending over at least two stitch columns, and that the loop bar C (16) forms knitted stitches (30) or weft loops extending over at least two columns of stitches or - a multifilament yarn A and a multifilament yarn B knitted respectively with a loop bar A,and a loop bar B, each forming chain stitches and / or knitted stitches extending over at least two stitch columns, and a composite yarn C knitted with a loop bar C so as to form weft throws extending substantially over all the stitch columns, and in that said knitted composite yarn C (17) comprises a multifilament yarn C1 comprising filaments each having a linear mass greater than or equal to 1 dtex and a multifilament yarn C2 comprising filaments each having a linear mass less than 1 dtex, said composite yarn C (17) has a boiling water shrinkage greater than or equal to 20% and less than or equal to 50%, said intermediate knitted fabric with looped stitches obtained in step (i) has a surface mass M1,and said process further comprises: - a heat treatment step (ii) of said intermediate open-knit textile so as to obtain the dimensional shrinkage of said at least one composite yarn C (17), in that the knitted textile with dropped stitches (100) obtained in step (ii) has a surface mass M2 greater than M1, M2 being greater than or equal to 100 g / m 2, and in that the knitted textile with dropped stitches (100) obtained in step (ii) has a mass fraction of polyester filament(s) greater than or equal to 50%.
13. Manufacturing method according to claim 12, characterized in that the loop bar A (12) forms closed (22) and open (24) knitted stitches extending over at least two columns of stitches (C1,C2,C3) and at most over five columns of stitches (C1,C2,C3), the loop bar B (14) forms closed (26) and open (28) knitted stitches extending over at least two columns of stitches (C5,C6,C7) and at most over five columns of stitches (C5,C6,C7), the loop bar C (16) forms knitted stitches (30) extending over at least three columns of stitches (C9,C10,C11,C12) and forming a return every m rows of stitches, m being an integer between 1 and 3.
14. A manufacturing process according to either of claims 12 and 13, characterized in that the length of the composite yarn C (17) absorbed in the knitted textile with dropped stitches (100) obtained in step (i) is Lfa C, the length of yarn A (13) or yarn B (15) absorbed in the knitted textile with dropped stitches obtained in step (i) is Lfa A or Lfa B, and in that Lfa C is greater than Lfa A or Lfa B.
15. A manufacturing process according to any one of claims 12 to 14, characterized in that the multifilamentary yarn Cl is a drawn yarn (DY) or fully drawn yarn (FDY), and in that the multifilamentary yarn C2 is a drawn and textured yarn (DTY).
16. A manufacturing process according to any one of claims 12 to 15, characterized in that the knitted textile with dropped stitches (100) obtained in step (ii) has a first face and a second face substantially opposite to the first face, and in that said process comprises a step of scraping at least one of the first and second faces.