EP3623509B1 - Fabric made of twisted yarns - Google Patents

Description

The present invention relates to a fabric made from interwoven threads which is suitable for use in automobile applications, in particular as a fabric cover in automobile seats.

The invention relates to fabrics for use in automobile seats (in particular for the surfaces which come into contact with the vehicle occupants) and to automobile seats which contain the fabrics according to the invention. Such fabrics are subject to strong mechanical stress over many years of use, but may show as little wear as possible. Wear is caused in particular by chafing and pilling.

At the same time, the requirements for good seating comfort are increasing. The seating comfort can be noticeably increased through the use of fibers with good moisture absorption capacity. Cellulosic fibers and wool would be particularly suitable for this, but these usually have a significantly reduced rub resistance and increased pilling compared to synthetic fibers.

Car seat fabrics currently consist mainly of synthetic fibers and mainly 100% polyester fibers (yarn dyed / spun-dyed) or a mixture with wool. In fabrics made from 100% polyester, inexpensive filament yarn is predominantly used, with a high-priced worsted yarn being used in a mixture with wool. This is the only way to meet the high requirements of the automotive industry. High demands placed on car seat fabrics by German OEMs in particular include high abrasion resistance, no occurrence of pilling and fastness to rubbing, especially fastness to wet rubbing. Since the emissions scandal and the increasing production of electric cars, the argument of sustainability has become more and more important for the automotive industry. As a result, according to the state of the art, recycled polyester with or without wool is used for the production of car seat fabrics. The use of cotton as an ecologically more sustainable fiber is not possible because it has too small a fiber diameter (poor abrasion resistance), too short a fiber length (easy pilling) and poor wet rub fastness in dark colors. This results from the fact that only yarn or piece dyeing and no spin dyeing is possible for cotton. In the past, viscose fibers were also used in combination with polyester fibers, see for example CN 207523508 U .

However, the types of fiber used had the same disadvantages as cotton.

The object of the present invention is to provide a fabric which can be used in particular as a car seat fabric, in which at least part of the currently used polyester fiber materials is replaced by cellulosic fibers.

This object is achieved by a fabric according to claim 1.

Furthermore, the invention relates to the use of the fabric according to the invention in automotive applications, a method for determining whether a fabric or the yarns contained therein is suitable for automotive applications, and a method for producing a fabric which includes the step of checking whether the fabric or The yarns contained therein are suitable for automotive applications.

Preferred embodiments are given in the subclaims.

Detailed description of the invention

The fabric according to the invention consists of twisted threads (warp and weft threads) interwoven in a manner known per se, the twisted threads in turn each consisting of two threads twisted together, which contain fibers.

Instead of conventional fabrics that are used in automobile seats, the fabrics according to the invention contain at least a certain proportion of yarns which contain cellulosic staple fibers of the types Lyocell (hereinafter: "Lyocell fibers") and / or of the types viscose (hereinafter: "Viscose fibers") and / or modal (hereinafter "modal fibers").

The terms "Lyocell", "Viscose" and "Modal" are generic terms used in the EU Textile Labeling Regulation (https://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2011:272 : 0001: 0064: DE: PDF) are explained in more detail. Lyocell fibers are cellulose fibers that are obtained by spinning solutions of cellulose without derivatization. Viscose and modal fibers are fibers that are obtained by spinning a cellulose derivative (cellulose xanthogenate) and, in the case of modal fibers, are also characterized by certain textile parameters.

In the fabrics according to the invention, at least one of the yarns twisted together to form a twisted thread contains a mixture of polyester fibers and the cellulosic staple fibers mentioned.

The cellulosic staple fibers in the yarn are preferably either only lyocell fibers or only modal fibers or only viscose fibers. However, mixtures are also possible.

Lyocell fibers or modal fibers or mixtures of lyocell fibers and modal fibers are preferably used as cellulosic staple fibers.

Likewise, different yarns can be used in a fabric according to the invention, which yarns have different compositions, both with regard to the type of cellulosic staple fibers contained and their mixing ratio with the polyester staple fibers.

The proportion of cellulosic staple fibers in the fabric according to the invention is 10% by weight or more, preferably 20% by weight or more, particularly preferably 30% by weight or more.

The upper limit of the proportion of cellulosic staple fibers in the fabric can be up to 90% by weight, in particular up to 70% by weight, preferably up to 60% by weight, particularly preferably up to 50% by weight.

With regard to the yarns in which the cellulosic staple fibers are contained, the proportion of cellulosic staple fibers can be 10% by weight to 90% by weight, preferably 20% by weight to 70% by weight, in particular 30% by weight to 60% by weight. %.

1. 1) Gewebe aus zwei Zwirnen, die jeweils aus zwei Garnen mit je 70% Polyesterstapelfasern und 30% Modalfasern bestehen:
   Gesamtanteil an cellulosischen Stapelfasern (hier: Modalfasern) im Gewebe: 30%.
   Anteil der Modalfasern in den Garnen: jeweils 30%
2. 2) Gewebe aus zwei Zwirnen A und B
   Zwirn A besteht aus zwei Garnen mit je 70% Polyesterstapelfasern und 30% Modalfasern
   Zwirn B besteht aus zwei Garnen mit je 50% Polyesterstapelfasern und 50% Lyocellfasern Beide Zwirne haben gleiches Gewicht.

The weight fraction of cellulosic staple fibers in the yarns or in the woven fabric is explained further using the following examples:

1. 1) Fabric made from two threads, each consisting of two threads, each with 70% polyester staple fibers and 30% modal fibers:
   Total proportion of cellulosic staple fibers (here: modal fibers) in the fabric: 30%.
   Proportion of modal fibers in the yarns: 30% each
2. 2) Fabric made from two threads A and B
   Twine A consists of two yarns, each with 70% polyester staple fibers and 30% modal fibers
   Twine B consists of two yarns, each with 50% polyester staple fibers and 50% lyocell fibers. Both twines have the same weight.

Total proportion of cellulosic staple fibers in the fabric: 40% (mean of 30% and 50%) Proportion of cellulosic staple fibers in the yarns: 30% or 50%.

1. a) 32881*Faserart_Cell + 9969*Titer_Cell -257*Schnittlänge_Cell - 20714*Schnittlänge_PET + 24514*Z_α - 20514*G_α - 4119*Flächengewicht + 5850*Kettdichte + 3004*Schussdichte - 833018 ≥ 100.000, bevorzugt ≥ 140.000, besonders bevorzugt ≥ 170.000, insbesondere bevorzugt ≥ 195.000
2. b) -115*Schnittlänge_PET + 171*Z_α - 129*G_α - 29*Flächengewicht + 37*Kettdichte + 19*Schussdichte - Garntiter - 6155 ≥ 1500, bevorzugt ≥ 1800, besonders bevorzugt ≥ 1900.

Surprisingly, it has been found that fabrics are particularly suitable for use in automotive applications, in particular in automobile seats, if the fabric or those yarns contained therein, which contain polyester staple fibers and the cellulosic staple fibers, as well as the twisted threads made therefrom meet the following relationships :

1. a) 32881 * fiber type _Cell + 9969 * titer _Cell -257 * cut length _Cell - 20714 * cut length _PET + 24514 * Z _α - 20514 * G _α - 4119 * weight per unit area + 5850 * warp density + 3004 * weft density - 833018 ≥ 100,000, preferably ≥ 140,000, particularly preferably 170,000, particularly preferably 195,000
2. b) -115 * cutting length _PET + 171 * Z _α - 129 * G _α - 29 * weight per unit area + 37 * warp density + 19 * weft density - yarn denier - 6155 ≥ 1500, preferably ≥ 1800, particularly preferably ≥ 1900.

wobei T die Drehung des Zwirns in Anzahl Drehungen pro Meter und Titer den Titer des Zwirns (in tex) bedeuten G_α Drehungsbeiwert des Garns, zu ermitteln analog zum Drehungsbeiwert des Zwirns Flächengewicht Flächengewicht des Gewebes in [g/m²] Kettdichte Kettdichte des Gewebes in [Fd/10cm] Schußdichte Schussdichte des Gewebes in [Fd/10cm] Garntiter Titer der Garne in [dtex] The following applies _Cell type of fiber: Type of fiber of the cellulosic staple fiber, where: Lyocell = 1; Modal = 2, for mixtures of lyocell and viscose and / or modal the result is a value between 1 and 2 depending on the weight percentage of the lyocell and viscose or modal fibers. For example, for mixtures containing Lyocell and Modal in a ratio of 80 to 20, the value for type of fiber _Cell = 1.2 (1 * 0.8 + 2 * 0.2) Titer _Cell Single fiber titer of the cellulose staple fibers contained in [dtex], for mixtures of lyocell and viscose and / or modal depending on the weight percentage. Example: A mixture of Lyocell 1.3 dtex and Modal 1.7 dtex in a ratio of 80 to 20 results in a value for Titer _Cell of 1.38 (1.3 * 0.8 + 1.7 * 0.2) . Cutting length _Cell Cut length of the cellulose staple fibers contained in [mm], for mixtures of lyocell and viscose and / or modal depending on the weight fraction as in the above example for Titer _Cell Cutting length _PET Cut length of the polyester staple fibers contained in [mm] Z _α Twist coefficient of twist: $Z_{\alpha }=T\times \surd \frac{\mathit{Titer}}{1000},$

in which T is the twist of the twine in number of twists per meter and titer denotes the titer of the twine (in tex) G _α Twist coefficient of the yarn, to be determined analogously to the twist coefficient of the thread Basis weight Weight per unit area of the fabric in [g / m ² ] Warp density Warp density of the fabric in [Fd / 10cm] Weft density Weft density of the fabric in [Fd / 10cm] Yarn titer Titer of the yarn in [dtex]

The person skilled in the art is familiar with the determination of all of the textile parameters given above.

It has surprisingly been found that fabrics which meet the above formulas meet the abrasion resistance required by the automotive industry in the so-called "Martindale abrasion test" according to ISO 12947, in particular ISO 12947-2.

The automotive industry usually requires a chafing score of at least 3 with a number of chafing cycles of 35,000 to 60,000, in particular 50,000 to 60,000, and a print run pressure of 12 kPa. The abrasion rating is given as a measure of the discoloration / graying of the sample according to ISO 105-A02 on a scale from 1 (worst value) to 5 (best value). From a value of 3, the fabric can be considered suitable for use in automobile seats. The requirement can vary depending on the positioning of the fabric in the automobile seat (e.g. side panels compared to the center panel), which is reflected either in a lower requirement for the abrasion mark or a lower number of abrasion cycles.

Furthermore, the automotive industry demands a certain (low) degree of damage to the fabric after the end of the abrasion test (i.e. after a number of abrasions of 35,000 to 60,000, in particular 50,000 to 60,000). If two (or more) thread breaks appear at the scuffed point upon visual inspection, the fabric is considered unsuitable for use in car seats.

It has surprisingly been found that there is a clear relationship between the combination of the parameters mentioned and the suitability (or also unsuitability) of a fabric for use in particular in automobile seats.

If the fabric according to the invention fulfills the two formulas a) and b) above, it also achieves a chafe rating of at least 3 and the desired (low) degree of damage for a given number of chafing cycles.

To produce the fabric according to the invention, the person skilled in the art only has to adapt the parameters of the yarns, twisted threads and the fabric construction used so that the above relationships are met.

In a fabric according to the invention, the titer _{Cell is} preferably 0.9 dtex, particularly preferably 1.25 dtex.

Furthermore, the cut length of the contained cellulosic staple fiber cut length _{Cell is} preferably 34 mm, particularly preferably 38 mm.

For viscose fibers, particularly preferred ranges for titer _Cell ≥ 2.4 dtex and for cut length _{Cell are} preferably 50 mm.

Surprisingly, it was found that the high requirements of the automotive industry can be met with a combination of polyester staple fibers with cellulosic staple fibers, especially if the titer of the staple fibers is increased to at least 2.5 dtex and the cut length of the staple fibers to at least 50 mm.

In a further preferred embodiment of the present invention, the twist coefficient Z _{α of} those twisted yarns which contain yarns with cellulosic staple fibers is 140-165.

Furthermore, the twist coefficient G _{α of} those yarns which contain cellulosic staple fibers is preferably 90-135, in particular 110-135

The weight per unit area of the fabric according to the invention can preferably be 180-500 [g / m ² ].

The person skilled in the art can adjust the warp and weft density as a function of the thickness of the yarns used within the scope of his specialist knowledge.

• Titer_Cell bevorzugt ≥ 0,9 dtex, besonders bevorzugt ≥ 1,25 dtex, insbesondere ≥ 2,4 dtex oder ≥ 2,5 dtex.
• Schnittlänge_Cell bevorzugt ≥ 34mm, besonders bevorzugt ≥ 38 mm, insbesondere mindestens 50 mm
• Drehungsbeiwert des Zwirns Z_α 140 - 165
• Drehungsbeiwert des Garns G_α 90 - 135, insbesondere 110 - 135
• Flächengewicht: 80 - 500 [g/m²].

Particularly preferred is a fabric which has a combination of all of the preferred values described above, for which the following applies:

• Titer _Cell preferably ≥ 0.9 dtex, particularly preferably ≥ 1.25 dtex, in particular ≥ 2.4 dtex or ≥ 2.5 dtex.
• Cutting length _Cell preferably 34 mm, particularly preferably 38 mm, in particular at least 50 mm
• Twist coefficient of the thread Z _α 140 - 165
• Twist coefficient of the yarn G _α 90-135, in particular 110-135
• Basis weight: 80-500 [g / m ² ].

The cellulosic staple fibers contained in a fabric according to the invention can be dyed, in particular spun-dyed. The person skilled in the art understands spin dyeing to be the admixture of a dye into the spinning solution from which the fiber is spun, or into a precursor thereof. This creates fibers that are not only colored on the surface, but also through their fiber matrix.

If such spun-dyed made cellulose fibers are used within the specifications of formulas a) and b) above, the required specification of wet rub fastness, which is particularly critical for such fibers, can be achieved even with dark colored fibers.

Another preferred embodiment of the fabric according to the invention is characterized in that some of the threads contain a polyester filament yarn or consist of polyester filament yarns.

Surprisingly, it has been found that a (partial) use of polyester filament yarns, as they are already being used for the production of fabrics for automobile seats, has no influence on the relationships given by the above formulas a) and b).

In other words, a certain proportion of polyester filament yarns does not play a role in the suitability of the fabrics according to the invention in automobile seats.

Another preferred embodiment of the fabric according to the invention is characterized in that the fabric, in addition to polyester staple fibers, lyocell staple fibers, Viscose staple fibers and / or modal staple fibers and possibly polyester filament yarns contain no further textile fiber materials.

Another aspect of the present invention relates to the use of a fabric according to the invention in automobile applications, in particular as a fabric cover in automobile seats.

• a') 32881*Faserart_Cell + 9969*Titer_Cell -257*Schnittlänge_Cell - 20714*Schnittlänge_PET + 24514*Z_α - 20514*G_α - 4119*Flächengewicht + 5850*Kettdichte + 3004*Schussdichte - 833018
  und
• b') -115*Schnittlänge_PET + 171*Z_α - 129*G_α - 29*Flächengewicht + 37*Kettdichte + 19*Schussdichte - Garntiter - 6155

ergebenden Werte ermittelt werden und überprüft wird, ob
der sich aus der Expression a' ergebende Wert ≥ 100.000, bevorzugt ≥ 140.000, besonders bevorzugt ≥ 170.000, insbesondere bevorzugt ≥ 195.000 ist und
der sich aus der Expression b' ergebende Wert ≥ 1500, bevorzugt ≥ 1800, besonders bevorzugt ≥ 1900 ist.The present invention also relates to a method for determining the suitability of a fabric made of interwoven threads, two threads being twisted together to form a thread and at least one of the threads containing polyester staple fibers and cellulosic staple fibers of the types lyocell, viscose and / or modal , the proportion of cellulosic staple fibers in the fabric being from 10% by weight to 90% by weight, for use in automobiles, in particular in automobile seats, which is characterized in that for the fabric or those of the yarns contained therein, which Contain polyester staple fibers and cellulosic staple fibers, as well as the threads made from them, which result from the two expressions

• a ') 32881 * fiber type _Cell + 9969 * titer _Cell -257 * cut length _Cell - 20714 * cut length _PET + 24514 * Z _α - 20514 * G _α - 4119 * basis weight + 5850 * warp density + 3004 * weft density - 833018
  and
• b ') -115 * cutting length _PET + 171 * Z _α - 129 * G _α - 29 * basis weight + 37 * warp density + 19 * weft density - yarn denier - 6155

The resulting values are determined and it is checked whether
the value resulting from the expression a 'is 100,000, preferably 140,000, particularly preferably 170,000, particularly preferably 195,000 and
the value resulting from the expression b 'is 1500, preferably 1800, particularly preferably 1900.

The parameters used in the two expressions a 'and b' and their measurement are as already indicated above.

If both values resulting from the expressions a 'and b' are above the lower limits given above, the fabric is suitable for use in automobiles, in particular in automobile seats.

The lower limits can be selected by a person skilled in the art depending on the specifications given by the customer (automobile manufacturer). If, for example, the customer considers a slightly lower abrasion score (e.g. 3) or the achievement of a certain abrasion score with a lower number of abrasion cycles (e.g. 35,000) to be sufficient for a certain application, the lower limit of the value for the expression a 'can be in the lower range (ab 100,000).

• den Schritt des Einsetzens von bestehenden oder geplanten Parameter des Gewebes bzw. der darin enthaltenen Garne, welche Polyester-Stapelfasern und cellulosische Stapelfasern enthalten, sowie der daraus hergestellten Zwirne in die Expressionen
  • a') 32881*Faserart_Cell + 9969*Titer_Cell -257*Schnittlänge_Cell - 20714*Schnittlänge_PET + 24514*Z_α - 20514*G_α - 4119*Flächengewicht + 5850*Kettdichte + 3004*Schussdichte - 833018
    und
  • b') -115*Schnittlänge_PET + 171*Z_α - 129*G_α - 29*Flächengewicht + 37*Kettdichte + 19*Schussdichte - Garntiter - 6155,
• gegebenenfalls Anpassen der bestehenden Parameter bzw. Vervollständigen der Parameter,

sodass der sich aus der Expression a' ergebende Wert ≥ 100.000, bevorzugt ≥ 140.000, besonders bevorzugt ≥ 170.000, insbesondere bevorzugt ≥ 195.000 ist und
der sich aus der Expression b' ergebende Wert ≥ 1500, bevorzugt ≥ 1800, besonders bevorzugt ≥ 1900 ist.The present invention further relates to a method for producing a fabric intended for use in automobiles, in particular in automobile seats, from interwoven threads, two threads being twisted together to form a thread and at least one of the threads being polyester staple fibers and cellulosic staple fibers Contains genera lyocell, viscose and / or modal, the proportion of cellulosic staple fibers in the fabric being from 10% by weight to 90% by weight, comprising

• the step of inserting existing or planned parameters of the fabric or the yarns contained therein, which contain polyester staple fibers and cellulosic staple fibers, and the twisted threads produced therefrom in the expressions
  • a ') 32881 * fiber type _Cell + 9969 * titer _Cell -257 * cut length _Cell - 20714 * cut length _PET + 24514 * Z _α - 20514 * G _α - 4119 * basis weight + 5850 * warp density + 3004 * weft density - 833018
    and
  • b ') -115 * cutting length _PET + 171 * Z _α - 129 * G _α - 29 * basis weight + 37 * warp density + 19 * weft density - yarn denier - 6155,
• If necessary, adapt the existing parameters or complete the parameters,

so that the value resulting from the expression a 'is 100,000, preferably 140,000, particularly preferably 170,000, particularly preferably 195,000 and
the value resulting from the expression b 'is 1500, preferably 1800, particularly preferably 1900.

The parameters used in the two expressions a 'and b' and their measurement are again as defined above.

The person skilled in the art can thus determine in the course of the production of a fabric on the basis of the parameters of the yarns, twisted threads and the fabric that are planned, whether a suitable fabric can be produced with them. If this is not the case because the desired values (right-hand side of the formula) are not met, the person skilled in the art can change one or more parameters accordingly.

Embodiments:

Yarns were made from polyester staple fibers and lyocell staple fibers as well as spun-dyed modal staple fibers. Every two of these yarns were twisted into one thread, and the resulting threads were woven together into one fabric.

The (weight) ratio of cellulosic staple fibers to polyester staple fibers in the yarns was in each case 30 to 70.

The resulting fabrics were subjected to a Martindale scouring test. The number of abrasion cycles was 50,000 revolutions in each case, with the exception of those fabrics, the cellulose fibers, which had a cut length of 75 mm. With these fabrics the number of abrasion revolutions was 60,000 revolutions.

The following tables summarize the respective parameters of the fiber materials used, the yarns, the twisted threads and the woven fabric.

Table 1 lists the parameters relevant to formula a), the value resulting when inserted into the left-hand part of formula a), and the chafing score actually obtained.

Table 2 lists the parameters relevant for formula b), the value resulting when inserted into the left-hand part of formula b) and the result of the actual assessment of the degree of damage ("0" for "no damage", ie less than 2 Thread breaks at the rubbed point, "1" for "damage", i.e. 2 or more thread breaks at the rubbed point): Table 1: Example no. Type of fiber _Cell * Titer _Cell (dtex) Cutting length _Cell (mm) Cutting length _PET (mm) Z _α G _α Weight per unit area (g / m ² ) Warp density (thread / 10cm) Weft density (Fd / 10cm) Result formula Measured chafing note 1 1 1.4 38 38 133 110 304 275 124 149814 3 2 1 2.8 50 50 154 120 299 272 124 224817 4.5 3 1 3.3 60 60 165 125 302 272 124 174819 3.5 4th 2 3.3 51 60 160 135 328 316 188 224865 4.5 5 2 3.3 51 60 160 135 232 272 124 149919 3 6th 1 2.8 50 60 165 125 300 248 168 172418 3.5 7th 1 3.3 60 60 165 125 300 248 168 174833 3.5 8th 2 2.5 50 60 165 125 300 248 168 202306 4th 9 1 4.7 75 78.4 151 90 300 248 168 178591 3.5 10 1 6.7 75 78.4 151 90 300 248 168 198529 4th 11 2 3.3 75 78.4 151 90 300 248 168 197515 4th * 1 = Lyocell, 2 = Modal Example no. Type of fiber _Cell * Titer _Cell (dtex) Cutting length _Cell (mm) Cutting length _PET (mm) Z _α G _α Weight per unit area (g / m ² ) Warp density (thread / 10cm) Weft density (Fd / 10cm) Yarn titer (dtex) Result formula damage 1 1 1.4 38 38 133 110 304 275 124 769.23 974 2 1 2.8 50 50 154 120 299 272 124 714.29 1984 0 3 1 3.3 60 60 165 125 302 272 124 714.29 1983 0 4th 2 3.3 51 60 160 135 328 316 188 588.24 2054 0 5 2 3.3 51 60 160 135 232 272 124 588.24 1994 0 6th 1 2.8 50 60 165 125 300 248 168 714.29 1989 7th 1 3.3 60 60 165 125 300 248 168 714.29 1989 0 8th 2 2.5 50 60 165 125 300 248 168 714.29 1989 0 9 1 4.7 75 78.4 151 90 300 248 168 714.29 1994 0 10 1 6.7 75 78.4 151 90 300 248 168 714.29 1994 0 11 2 3.3 75 78.4 151 90 300 248 168 714.29 1994 0 * 1 = Lyocell, 2 = Modal

The tables show the connection between the suitability or unsuitability of the respective fabrics and the values obtained from formulas a) and b) in an impressive manner.

Example 1 corresponds to the requirements in terms of the scuff rating in the scouring test (the condition of formula a) is met, see Table 1), but does not meet the condition of formula b) (see Table 2) and therefore showed too high a degree of damage on.

Claims (15)

1. A fabric made of interwoven twines, wherein, in each case, two yarns are twisted together to form a twine and at least one of the yarns contains polyester staple fibres and cellulosic staple fibres of the types lyocell, viscose and/or modal, the share of cellulosic staple fibres in the fabric ranging from 10% by weight to 90% by weight, characterized in that the fabric or, respectively, those of the yarns contained therein which contain polyester staple fibres and cellulosic staple fibres as well as the twines produced therefrom comply with the following relationships:

   a) 32881*Fibre type_cell + 9969*Titre_cell -257*Cut length_cell - 20714*Cut length_PET + 24514*Z_α - 20514*G_α - 4119*Basis weight + 5850*Warp density + 3004*Weft density - 833018 ≥ 100,000, preferably ≥ 140,000, particularly preferably ≥ 170,000, with particular preference ≥ 195,000

   b) -115*Cut length_PET + 171*Z_α - 129*G_α - 29*Basis weight + 37*Warp density + 19*Weft density - yarn titre - 6155 ≥ 1500, preferably ≥ 1800, particularly preferably ≥ 1900,

   wherein the following applies: Fibre type_cell: Fibre type of the cellulosic staple fibre, wherein the following applies: lyocell = 1; viscose as well as modal = 2, for mixtures of lyocell and viscose and/or modal, the result is a value of between 1 and 2, depending on the weight percentage of the lyocell and viscose or, respectively, modal fibres. Titre_cell Single fibre titre in [dtex] of the cellulose staple fibres contained, for mixtures of lyocell and viscose and/or modal, depending on the weight percentage Cut length_cell Cut length in [mm] of the cellulose staple fibres contained, for mixtures of lyocell and viscose and/or modal, depending on the weight percentage Cut length_PET Cut length in [mm] of the polyester staple fibres contained Z_α twisting factor of the twine G_α twisting factor of the yarn Basis weight Basis weight of the fabric in [g/m²] Warp density Warp density of the fabric in [Fd/10cm] Weft density Weft density of the fabric in [Fd/10cm] Yarn titre Titre of the yarns in [dtex]
2. A fabric according to claim 1, characterized in that Titre_cell is ≥ 0.9 dtex, preferably ≥ 1.25 dtex.
3. A fabric according to claim 1 or 2, characterized in that Cut length_cell is ≥ 34 mm, preferably ≥ 38 mm.
4. A fabric according to any of the preceding claims, characterized in that Z_α is 140 - 165.
5. A fabric according to any of the preceding claims, characterized in that G_α is 90 - 135, preferably 110 - 135.
6. A fabric according to any of the preceding claims, characterized in that the basis weight is 180 - 500 [g/m²].
7. A fabric according to any of the preceding claims, characterized in that the share of cellulosic staple fibres in the fabric is 20% by weight or more, preferably 30% by weight or more.
8. A fabric according to claim 7, characterized in that the share of cellulosic staple fibres in the fabric is up to 70% by weight, preferably up to 60% by weight, particularly preferably up to 50% by weight.
9. A fabric according to any of the preceding claims, characterized in that the share of cellulosic staple fibres in those yarns in which cellulosic staple fibres are contained ranges from 10% by weight to 90% by weight, preferably from 20% by weight to 70% by weight, in particular from 30% by weight to 60% by weight.
10. A fabric according to any of the preceding claims, characterized in that the cellulosic staple fibres are spin-dyed.
11. A fabric according to any of the preceding claims, characterized in that part of the twines contain a polyester filament yarn or consist of polyester filament yarns.
12. A fabric according to any of the preceding claims, characterized in that the fabric contains no other textile fibre materials apart from polyester staple fibres, lyocell staple fibres, viscose staple fibres and/or modal staple fibres and, optionally, polyester filament yarns.
13. The use of a fabric according to any of the preceding claims in automotive applications, in particular as a fabric cover in automobile seats.
14. A process for determining the suitability of a fabric made of interwoven twines, wherein, in each case, two yarns are twisted together to form a twine and at least one of the yarns contains polyester staple fibres and cellulosic staple fibres of the types lyocell, viscose and/or modal, the share of cellulosic staple fibres in the fabric ranging from 10% by weight to 90% by weight, for use in automobiles, in particular in automobile seats, characterized in that, for the fabric or, respectively, those of the yarns contained therein which contain polyester staple fibres and cellulosic staple fibres, as well as the twines produced therefrom, the values resulting from the two expressions

    a') 32881*Fibre type_Cell + 9969*Titre_Cell -257*Cut length_cell - 20714*Cut length_PET + 24514*Z_α - 20514*G_α - 4119*Basis weight + 5850*Warp density + 3004*Weft density - 833018
    and

    b') -115*Cut length_PET + 171*Z_α - 129*G_α - 29*Basis weight + 37*Warp density + 19*Weft density - yarn titre - 6155

    are determined and it is checked as to whether
    the value resulting from the expression a' is ≥ 100,000, preferably ≥ 140,000, particularly preferably ≥ 170,000, with particular preference ≥ 195,000, and
    the value resulting from the expression b' is ≥ 1500, preferably ≥ 1800, particularly preferably ≥ 1900.
15. A process for the production of a fabric made of interwoven twines, wherein, in each case, two yarns are twisted together to form a twine and at least one of the yarns contains polyester staple fibres and cellulosic staple fibres of the types lyocell, viscose and/or modal, the fabric being intended for use in automobiles, in particular in automobile seats, the share of cellulosic staple fibres in the fabric ranging from 10% by weight to 90% by weight, comprising

    - the step of inserting existing or planned parameters of the fabric or, respectively, of the yarns contained therein which contain polyester staple fibres and cellulosic staple fibres, and of the twines produced therefrom, in the expressions

    a') 32881*Fibre type_Cell + 9969*Titre_Cell -257*Cut length_cell - 20714*Cut length_PET + 24514*Z_α - 20514*G_α - 4119*Basis weight + 5850*Warp density + 3004*Weft density - 833018
    and

    b') -115*Cut length_PET + 171*Z_α - 129*G_α - 29*Basis weight + 37*Warp density + 19*Weft density - yarn titre - 6155

    - optionally, adapting the existing parameters or, respectively, completing the parameters,

    so that the value resulting from the expression a' is ≥ 100,000, preferably ≥ 140,000, particularly preferably ≥ 170,000, with particular preference ≥ 195,000, and
    the value resulting from the expression b' is ≥ 1500, preferably ≥ 1800, particularly preferably ≥ 1900.