EP2265466A1

EP2265466A1 - Textile fabric for a vehicle seat cover

Info

Publication number: EP2265466A1
Application number: EP08761183A
Authority: EP
Inventors: Svenn Engelking; Ulrike Thill; Ulrich Schulte
Original assignee: HAENSEL VERBUNDTECHNIK GmbH; Hansel Verbundtechnik GmbH
Current assignee: Gerlinger Industries AG
Priority date: 2007-10-26
Filing date: 2008-06-18
Publication date: 2010-12-29
Also published as: DE102008003965A1; WO2009053121A1

Abstract

The invention relates to a textile fabric for the combination with a seat cover, particularly vehicle seat cover, for diverting electrostatic charges, comprising a flat fabric, in which intersecting, electrically conductive threads are arranged at certain distances, wherein a water and air tight, water vapor permeable membrane film is spot-glued onto the flat textile with glue points.

Description

Hansel Verbundtechnik GmbH Grünlandweg

D-58640 Iserlohn

Textile fabric for a vehicle seat cover

The invention relates to a textile fabric for combination with a seat cover, in particular a vehicle seat cover, for dissipating electrostatic charges.

In DE 199 52 115 B4 state of the art is discussed, which illustrates that already very different arrangements have been used for the derivation of electrostatic charges of vehicle seats and why this derivation is desirable.

In this document, as an arrangement for dissipating electrostatic charges of seating surfaces, which allows the use of any upper or any O berschicht for the respective seat and yet ensures a reliable derivation, proposed, the upper of the seat with an electric conductive fibers, e.g. B. underlay steel fibers having lower layer. In this case, the underlayer can be a nonwoven, woven or knitted fabric or a foam material which is mixed with the electrically conductive fibers. In addition, the topsheet material may be made of a textile material and the backsheet may be made of synthetic or natural fibers containing the electrically conductive fibers. This combination of topsheet and backsheet material may also include a third layer under the backsheet of a cushioning material.

The fibers of the underlayer material stiffen the Sitzbesug considerable. In addition, the seat climate is deteriorated, but in particular, the moisture transport may be hindered. From the German utility model DE 201 01 149 Ul a woven or knitted mattress cover fabric is known in the incorporated at certain intervals of not more than 2 cm from each other, electrically conductive yarns, z. Knitted or woven in, for example, having an electrically conductive core which is surrounded by an electrically insulating outer layer. The use of electrically conductive yarns is intended to counteract sleep disturbances caused by electric fields by avoiding electrical charges. However, the effectiveness of these textile fabrics is not satisfactory, because the electrical discharge is not optimal.

According to DIN EN 1149-5, 2005, an electrostatically dissipative material should fulfill at least one of the following requirements: t _bU <4s or S> 0.2 tested according to EN 1149-3.

The object of the invention is to provide a textile, electrostatic charges dissipative fabric that is supple or flexible and thus does not appreciably stiffen the reference of the seat and also supports a good seating climate.

This object is solved by the features of claim 1. Advantageous developments are characterized in the subclaims.

The invention includes a washable texfiies sheet of a flat, z. B. in warp and / or weft extending electrically conductive yarns having textile combined with a water vapor permeable airtight supple or flexible membrane film, this combination is punctually guaranteed by gluing with adhesive dots.

As a flat textile is z. Example, a woven, knitted, knitted, nonwoven fabric or knitted fabric with weft insertion with surface weights of 10 to 500, in particular from 30 to 100 g / m ² used. The textile is preferably made of polyester filament yarns or polyamide filament yarns or polyester fibers or polyamide fibers in the nonwoven fabric or cotton or mixtures thereof. However, Kevlar, aramid, glass or similar high performance fibers may also be used like yarns from z. As PP, Viscose or the like. The finenesses of the yarns are suitably between 11 and 1100 dtex.

Preferably, a woven or warp knitted fabric with weft insertion or fleece is used as a flat textile.

In particular filament yarns with finenesses between 11 and 1100 dtex are used as electrically conductive intersecting yarns, which are preferably introduced into the planar textile, for. B. are woven. Preferably, a so-called core-sheath yarn known per se is used with finenesses between 30 and 200 dtex of filaments with a core filament of z. B. a monofilament carbon filament and a sheathing of z, B. polyester or polyamide. In this case, the electrically conductive core material, in particular embodied as a core filament, is embedded within the sheathing of these two-component yarn filaments and does not extend radially as far as the sheathing surface. The core filament is expediently at least bilobal, in particular trilobal or else morelobal or two-, three-, four-, five- or six-lobed, as disclosed in DE 690 13 395 T2. Such yarns do not require grounding to dissipate electrostatic charge. They discharge by air ionization by the so-called corona effect bsw. Corona discharge. For the parallel running electrically conductive yarns of the intersecting yarns, a spacing of between 4 and 100, in particular between 6 and 35 mm, is preferably selected.

The glue dots consist of hot melt adhesives and have a diameter z. B. between 0.15 and 10 mm and a distribution of 6 to 20 g / m ² .

The membrane film is preferably made of PTFE, PET or PU or polyethersulfone or polyacrylonitrile or Celluloseace- and has z. B. a water vapor transmission resistance (measured according to ASTM E96-2000 variant E) of 500 to 6000 g / m ² x 24h and basis weights between 5 and 200 g / m ² on and Lei tet the water vapor particles, in particular molecularly through the film.

The textile fabric according to the invention has, in particular, an electrical shielding factor S according to DIN EN 1149-3 of between 0.39 and 0.75. The surface resistivity measured according to EN 2249-1 2006 is preferably between 5 x ¹⁰ -10 and 1 x 10 -10 ohms The half-life factor determined according to DIN EN 1149-5 is less than 4 s.

The sheet of the invention derives particularly effective electrostatic charges and ensures good physiological properties with respect to moisture transport and Thermoregulatiσn the seat cover. The textile fabric according to the invention is supple or flexible and does not affect the seating comfort.

Reference to the following embodiments, the invention is illustrated.

example 1

As a flat textile, a fabric of the following construction is produced:

Warp thread: filament yarn made of 100% polyester textured, fineness 78 dtex f 24 x 1, -

Weft: Filament yarn of 100% polyester textured, fineness 50 dtex f 36 x 2;

Core coat yarn in the chain:

Fineness 39 dtex f 6 x 1; with filaments having a core of trilobal monofilament ~ carbon filament and a polyester sheath;

Core coat yarn in the weft:

Fineness 39 dtex f 6 x 1; filaments having a core of trilobal monofilament ~ carbon filament and a polyester sheath; Tissue binding: X twill 2/2;

warp; 230 warp threads / dm, with the core-sheath yarn being used for each 44th salvage yarn; this gives a distance between two adjacent core-sheath yarns in the warp direction of 16 mm;

Weft density: 155 wefts / dm, with 2.4 for each. Weft the core-sheath yarn is inserted; this gives a distance between two adjacent core-sheath yarns in the weft direction of 16 mm;

Due to the spacings of the core-sheath yarns with conductive carbon monofilaments in FIG

Warp and weft direction of 16 mm each as measured value a shielding factor according to EN 1149-3 from S ^: = 0.36 to. The additional surface resistance measured according to EN 1149-1 2006 as a further value for the evaluation of the antistatic effectiveness is 1 x 10 ¹² ohms, the half-life factor t _5B is 0.01 s.

The fabric is coated with an adhesive paste point coating of 52 dots / cm ² and coating layers of 18 g / m ² , the adhesive consisting of COPES.

There is a lamination with a polyester membrane with a basis weight of 18 g / m ² .

The fabric according to the invention thus produced has a shielding factor S of 0.61. The surface resistance is 7 x 10 ¹⁰ Olim and the half-value side factor t. _o at 0.4 s.

The comparison of the measured values clearly indicates that the antistatic effectiveness of the textile fabric according to the invention is higher than in the case of the flat textile, which results from the combination of the dot coating and the polyester membrane. Example 2 ....

It is produced as a flat Texcilie a warp knit with weft insertion with the following parameters:

Warp: filament yarn made of 100% polyamide textured, fineness 11 dtex f 7;

Weft: Filament yarn made of 100% polyamide textured, fineness 11 dtex f 7, -

Core coat yarn in the chain:

Fineness 39 dtex f 6 x 1 with filaments having a core of trilobal monofilament carbon filament and a sheath of polyamide;

Core coat yarn in the weft:

This warp knit has a fineness of 32 grams (32 threads per 1 inch). Each 30th warp and every 55th course is covered with the core-sheath yarn. The weft density is 340 wefts / dm, the mass per unit area of the warp knitted fabric is 20 g / m ² .

Due to the spacings of the core-sheath yarns in the warp and weft directions of 16 cm each, the flat textile produced in this way has a shielding factor according to EN 1149-3 of S = 0.32 as the measured value. The additional surface resistance measured according to EN 1149-1 2006 as an additional value for the evaluation of the antistatic efficacy is 1 x 10 ^{1 "} ohms and the lifetime value factor t _is 0.01 s.

This sheet textile is provided in accordance with Example 1 selectively with adhesive and laminated with a PTFE membrane. Thereafter, the textile fabric has a shielding factor of S = 0.59. The surface resistance is 7 x 10 ¹⁰ ohms and the half-life factor t _M) less than 0.3 s. This example also shows that the lamination factor and the surface resistance can be considerably improved by the lamination. Apparently, the discharge capacity for electric charges is favored by the fact that both the membrane film material and the material of the adhesive absorb moisture molecules and / or OH groups from the atmospheric moisture or from body vapors, so that the conductivity of the system is increased. Due to the fact that the membrane film is glued only occasionally with adhesive dots, remain for the desired water vapor transmission sufficiently large free surface areas of z. B. over 90% on the film.

The textile fabric according to the invention can be selectively laminated onto the seat upholstery material with adhesive dots, the water vapor permeability of the composite not being impaired after being laminated on. In this case, the textile fabric according to the invention is located under the seat cover.

The lamination can be done with the side of the textile surface, so that the membrane film is arranged at the bottom.

However, it is expedient to glue the free area of the membrane film with adhesive dots to the seat cover element material. In this case, preferably the same adhesive is used, with which the textile surface is glued to the membrane film. This arrangement in particular does not restrict the elasticity of the seat cover and does not mechanically stress the material of the textile surface having the electrically conductive yarns because the intermediate layer containing the membrane in combination with the adhesive dots is sufficiently flexible and elastic. In this way u. a. also prevents the electrically conductive yarns from breaking.

In many cases, the self-capacitance of the seat cover including the textile fabric according to the invention is sufficient for a sufficient Coronaentiadung without grounding an electric charge in normal sitting use. If a further derivation is desired, a grounding in particular of the textile surface can be provided. It is within the scope of the invention to arrange a Pols terschicht under the fabric of the invention.

In the context of the invention, in particular yarn counts or> yarn counts of the electrically conductive yarns are processed, which are the yarn strengths bsw. Garnfeinheiten match, from which the combined fabric is made. For this, e.g. six filaments of electrically conductive yarn wound with a convolution yarn of non-conductive material, e.g. made of polyesters.

In principle, the individual filaments of the electrically conductive yarns are not readily processable on commonly used weaving and knitting machines because of their fineness. For this reason, depending on the application, a plurality of filaments are combined and with at least one of the strength of the filament bundle increasing Umwindungsgarn of non-conductive material, e.g. Polyester, wound.

Claims

claims

1. Textile fabric for the combination with a seat cover, in particular vehicle seat cover for dissipating electrostatic charges, comprising a flat Texti lie, in the intersecting, electrically conductive yarns are arranged at certain intervals, characterized in that on the flat textile a water - and air-impermeable, water vapor permeable membrane foil is glued at points with glue dots.

2. Sheet material according to claim 1, characterized in that the sheet-like textile is a woven fabric, knitted fabric with weft insertion, knitted fabric or fleece with surface weights between 10 and 500, in particular between 30 and 100 g / m ² .

3. The sheet according to claim 1 and / or 2, characterized in that the flat textile of cotton, viscose, polyester-filament or polyamide yarns or polyester or polyamide fibers or mixtures thereof or Kevlar- or Arabid- or glass or the like High performance fibers or synthetic yarns with finenesses between 11 and 1100 dtex, in particular between 33 and 167 dtex.

4. Fächächen according to claim 2 and / or 3, characterized e e c e e n e e c e e s that the flat textile is a woven or warp knit with weft insertion.

5. Fächächen according to one or more of claims 1 to 4, characterized in that the conductive yarns have finenesses between 11 and

HOOdtex, in particular between 39 and 156 dtex.

6. A fabric according to claim 5, characterized in that the conductive yarn filament yarns with in particular at least one Umwindungsgarn of electrically non-conductive material wound filaments of a core of at least bilobal particular trilobal monofilament carbon filament and a sheath made of plastic such as polyamide or polyester are formed.

7. The sheet material according to claim 5 and / or 6, characterized in that the parallel running conductive yarns have distances from one another between 4 and 100, in particular between 6 and 35 mm.

S, fabric according to one or more of claims 1 to

1, characterized in that the adhesive points have a diameter between 0.15 and 10 mrα and have a basis weight of 3 to 100 g / m ² , in particular from 6 to 18 g / m ² and in particular of polyester, polyamide, polyurethane or Mixtures thereof.

9. The sheet according to one or more of claims 1 to 8, characterized in that the membrane consists of PTFE or PET or PU and has a basis weight between 5 and 200, in particular between 15 and 50 g / m ² .

10. The sheet according to one or more of claims 1 to 9, characterized that it has an electrical shielding factor Ξ measured according to EN 1149-3 between 0.39 and 0.75 and half-value factors below 4 s.

11. The sheet material according to one or more of claims 1 to 10, characterized in that it has an electrical resistance measured according to EN 1149-1 2006 2.5 x 10 ^s, in particular between 5 x 10 ^R1 and 1 x 10 ¹² ohms, the half-life factors are below 0.1 s.

12. seat cover, in particular for Fahrzeugitse, comprising a particular textile upper material in combination with an electrostatic charges dissipative textile underlayer, characterized in that the lower layer comprises a textile fabric according to one or more of claims 1 to 11, which is selectively bonded to the upper ,

13. Seat cover according to claim 12, characterized in that it e e e s e i c h e s that the flat textile of the textile fabric is glued to the upper material.

14. Seat cover according to claim 12, characterized in that the membrane film of the textile fabric is attached to the

Upper material is glued.

15. Sitzbesug according to one or more of claims 12 to 14, characterized in that there e e e n e c e e s that the electrically conductive yarns of the flat textile are not grounded.