DE202006012155U1 - Electrically conductible contact thread has stretchability of whole thread limited by non-elastic core thread, and polyester thread or polyester multifilament thread can be used as core thread - Google Patents

Abstract

The electrically conductible contact thread has the stretchability of the whole thread limited by the non-elastic core thread. A polyester thread or a polyester multifilament thread can be used as the core thread. A metallically coated synthetic fiber or a high-grade steel staple fiber is used as the conductible multifilament thread, and a silver-coated nylon may be used as the metallically coated synthetic fiber. The electrically conductible threads are wound around the non-elastic core thread in an opposite direction. An independent claim is included for a fabric comprising at least one electrically conductible contact thread.

Description

technical area

The The present invention relates to electrically conductive contacting yarns.

State of technology

at the known from the prior art electrically conductive textiles The problem arises that the electrically conductive components of the textile For technical and / or economic reasons, not made in one piece become. As a result, an electrical contact between the different electrically conductive Components of the textile required.

Usually be the two electrically conductive components in electrical Contact with each other, adjacent to each other attached to one side of a textile carrier and in the area the contacting point by means of a yarn with the carrier fabric sutured. By the sewing thread exerted Pressure, the electrical contact between the two becomes electrical conductive Components made. So that the electrical contact between the two electrically conductive components resistant can be ensured, the sewing thread usually has to be great force around the electrically conductive Components are twisted, causing it to constrictions and in extreme cases, breakage and loss of electrical conductivity comes.

electrical conductive Textiles are also basically in type and extent the same mechanical loads exposed as normal, electrical non-conductive Textile. In particular, need all Textiles a high wash resistance exhibit. In the area of contact points between different electrically conductive components of the textile it comes back because of these loads again and again damage, whereby a loss of electrical conductivity can occur.

These Problems can be solved by a new kind of textile contacting. There is no direct contact between the electrically conductive elements made, which are brought into electrical contact with each other should. It comes in addition a third conductive Component for use, namely an electrically conductive Kontaktiergarn. Two arranged on different sides of a textile support electrically conductive Elements are contacted by the Kontaktiergarn and on this way electrically connected to each other.

The Kontaktiergarn used in this type of textile contacting has to meet different requirements. First, the contact yarn on its surface a good electrical conductivity have to ensure that a sufficient electrical Contact to the electrically conductive Elements is produced. At the same time the Kontaktiergarn a sufficient flexibility having two arranged on different sides of a textile support electrically conductive Elements through the textile support to connect with each other. Very tight bending radii occur during this the contacting yarn without damage and in particular without Loss of electrical conductivity has to cope.

The known from the prior art electrically conductive yarns fulfill these requirements only insufficient. There is therefore a need for electrically conductive yarns that are good electric conductivity and can be sewn with tight bending radii.

presentation the invention

Here implements the invention. The invention as characterized in the claims is the object of providing electrically conductive yarns, which have a good electrical conductivity and sewn with tight bending radii can be.

These The object is achieved by the electrically conductive Contact yarn according to claim 1 solved. Further advantageous details, aspects and embodiments of the present invention Invention will be apparent from the dependent claims, the Description and examples.

The according to the invention electrically conductive contacting yarn includes at least one non-elastic core thread and at least two electrically conductive threads wound around the core thread. The elasticity the entire electrically conductive Kontaktiergarns is limited by the non-elastic core thread.

Such a conductive Kontaktiergarn has on its surface a good electrical conductivity, since it is dispensed with an outer textile Umwindefaden. By using at least two electrically conductive threads, which are wound around the core thread, it is ensured that the non-conductive core thread is substantially completely covered by electrically conductive threads. Overstressing of the contacting yarn by tensile stress does not result in a reduction in the conductivity of the yarn because the extensibility of the yarn is limited by the core yarn. Before a loss of conductivity, it comes to a Tearing off the core thread. The Kontaktiergarn invention can be sewn with very low bending radii.

According to the invention Elongation of the Kontaktiergarns by the non-elastic core thread limited. In a tensile load namely give the electrically conductive Umwindefäden this Stress by spreading its helical shape to a lower one Number of turns per unit length of the core thread. It therefore comes to a demolition of the non-elastic core thread before a loss of conductivity occurs.

According to one preferred embodiment of The present invention is used as a core thread of the contacting yarn Polyester thread used. By using a polyester thread as a core thread can the properties of the Kontaktiergarns in particular in terms tear strength and bending radii are improved.

According to one another preferred embodiment The present invention is used as the core thread of the contacting yarn a polyester multifilament yarn is used. By using a polyester multifilament yarn as a core thread, the Properties of the contacting yarn, in particular with regard to tensile strength and bending radii are further improved.

According to one another preferred embodiment The present invention is at least one order the electrically wound thread wound around the core thread around a conductive multifilament yarn. By using a conductive Multifilament yarn as electrically conductive Umwindefaden can Properties of Kontaktiergarns in particular with regard to conductivity and Bending radii are further improved.

According to one another preferred embodiment The present invention is described as wound around the core thread electrically conductive multifilament yarn a metallic coated synthetic fiber or a stainless steel staple fiber used. By using these special conductive multifilament yarns as Umwindefaden the Properties of the contacting yarn, in particular with regard to conductivity and bending radii are further improved.

Especially are washable, silver coated Nylon yarns for producing the contacting yarns according to the invention. The market offers both monofilament and multifilament yarns. With Multifilament yarns as a wrap can be compared to monofilament Fibers higher area covers of the core can be achieved with the same yarn diameter.

According to one another preferred embodiment The present invention is therefore described as wound around the core thread electrically conductive multifilament yarn a metallic coated synthetic fiber namely silver coated nylon used. By using a silver-coated nylon multifilament yarn as Umwindefaden can the properties of the Kontaktiergarns in particular in terms conductivity and bending radii are further improved.

The Production of Kontaktiergarne invention can be done in different ways. The method is preferred the classic yarn wrap. This is the non-elastic core thread guided by a rotating hollow spindle. Sitting on the hollow spindle the yarn package with a conductive Thread. This thread is taken from the evenly withdrawn core thread, so that the conductive Thread in the form of a helix is wound around the core thread.

Basically arise by the winding of the core thread with another thread inner torsional that lead to, that the yarn in the unloaded state, so when unwinding the coil twisted around itself. Be two threads around the Core thread wound, so there is the possibility to eliminate these internal torsional forces. One speaks in this case of a "Ausbalanzieren" of the yarn the second thread namely wound in the opposite direction to the first thread around the core thread, so give torsional forces in opposite directions. Material and number of turns can now be matched by simple experiments so that the amounts the torsional forces approximately are equal and have a resulting torsional force of nearly zero results. As a result, it is ensured that the yarn barely or not at all when unloaded twisted itself.

According to one preferred embodiment of Present invention, therefore, the two electrically conductive threads are in opposite directions wrapped around the core thread. So if an electrically conductive thread for example in the S direction around the non-elastic core thread is wound, so is the second electrically conductive Umwindefaden wrapped in the Z direction around the core thread. So this is a crosswise winding.

According to another preferred embodiment of the present invention, the contacting yarn is provided with an additive for improving the lubricity. Particular advantages arise in this context when the Kontaktiergarn is used as sewing thread in a sewing machine. By coating the Kontaktiergarns with a known to the expert Additive increases the lubricity of the yarn and allows easy use in sewing machines.

The The present invention also encompasses fabrics that are at least one of the invention's electrical conductive Contain contacting yarn.

Ways to execute the invention

following the invention will be explained in more detail with reference to exemplary embodiments, but it becomes explicit noted that the invention is not limited to those specified Examples limited should be.

Example 1:

One Polyester multifilament yarn is placed on a yarn-winding machine and passed through a hollow spindle. The hollow spindle carries a conical yarn spindle, from the head over a silver-coated Nylon multifilament yarn peeled off through the polyester multifilament yarn becomes.

The easy with a conductive Umwindefaden wound polyester multifilament yarn is by a second hollow spindle out. This hollow spindle carries also a silver-coated nylon multifilament yarn. This second electrically conductive Umwindegarn is going in opposite directions to the first electrically conductive Wrap yarn wrapped around the core. The machine parameters are so selected that a balanced yarn is formed, as free as possible from internal torsional stresses is.

Example 2:

The Kontaktiergarn from Example 1 is used to make a heating jacket used. The heating jacket has a heat conductor, which consists of a Umwindegarn with a core of Lycra (1880 dtex), a stainless steel monofilament (50 μm diameter) as an inner wrap and a polyester multifilament yarn (50 dtex) as an outer wrap consists. The outer wrap is in reverse applied to the interior. It only partially covers the inner wrap from.

to Production of the heating jacket is the heating conductor first a textile carrier attached. As a carrier textile a polyester fabric is used. In a machine embroidery process becomes a polyester sewing thread as an upper thread to the top of the carrier fabric and the heating conductor introduced as a lower thread to the underside of the textile carrier. The upper thread (Holding yarn) is subsequently through the textile carrier passed through to the underside of the textile carrier. The heating conductor is from wrapped around the upper thread, whereby the heating element stretched at the Bottom of the textile support is attached. Finally the upper thread is passed through the textile support to the upper side led the textile support. By the continuous repetition of said process steps becomes the heat conductor stretched sewn to the underside of the textile support.

• • 6 Kettfäden-Umwindegarn; Kern Lycra 1880 dtex, 1. Umspinnung Litze 6 + 1 0,04 mm Silber, 2. Umspinnung Polyamid 110 dtex nicht vollständig abdeckend
• • 16 Kettfäden-Umwindegarn; Kern Lycra 1880 dtex, 1. Umspinnung Polyester 110 dtex, 2. Umspinnung Polyamid 110 dtex
• • weitere nicht leitfähige Polyestermultifilament-Kettfäden
• • Schussfaden Polyestermultifilamentgarn

In addition, the jacket has a textile feeder band with a conductor of pure silver strand, which is constructed in detail as follows:

• • 6 warp wraps; Core Lycra 1880 dtex, 1st strand strand 6 + 1 0.04 mm silver, 2nd strand polyamide 110 dtex not completely covering
• • 16 warp wraps; Core Lycra 1880 dtex, 1st spun polyester 110 dtex, 2nd spun polyamide 110 dtex
• • other non-conductive polyester multifilament warp threads
• • Weft polyester multifilament yarn

Of the Warp beam has symmetrically around the 6 conductive warp threads in the middle of each 8th non-conductive warp left and right on. In the field of conductive yarns are more relative not thin conductive Polyester warp (110 dtex) introduced. These disturb the contact between the conductive yarns not among each other. The bands are woven on a ribbon loom.

The Top of the band is smooth. The conductive wires can be directly be contacted. The heat conductor is by sewing with the conductive one Contact yarn according to example 1 brought into electrical contact with the feed belt. The heating conductor is under the carrier textile attached. On the carrier textile is the textile feed line. By means of the conductive contacting yarn according to example 1, the supply tape through the carrier fabric with the Sewn heating conductor.

By the Kontaktiergarn is an electrically conductive connection between the Heating conductor and the supply line produced. The conductive seam is applied perpendicular to the heating conductor direction as a triple seam. The described single-core feed line is so on the carrier fabric laid, that all to be contacted points of the heating conductor underneath lie.

The described heating jacket gives a completely textile impression. The heating conductors and the supply tapes are not from the outside to see and not to feel. The crush behavior is not changed by the heating conductors. The described jacket is completely machine washable. 10 machine washes at 30 ° C and 400 RPM spin speed survives the contact point without noticeable Losses in the heating power.

Example 3:

The Contact yarn from Example 1 is used to make a car seat heater used. The car seat heater has a heat conductor on, off a wraparound yarn with a core of lycra (1880 dtex), a silvered Copper monofilament (70 μm) and a polyester multifilament yarn (50 dtex) as an outer wrap consists. The outer wrap is in reverse applied to the interior. It only partially covers the inner wrap from.

to Production of the car seat heater, the heating conductor is initially in a knitted fabric incorporated. For this purpose, the textile conductor during the Knitting process inserted in a straight line between the courses. The meshes of the knitted fabric cover the heating conductor. In the places where the heating element is to be contacted, it becomes one-sided not covered by the mesh.

Of the Heating conductor is made by sewing with the conductive Contact yarn according to example 1 brought into electrical contact with a tinned copper strand. The copper strand is on the back of the knitted fabric. By means of the conductive Kontaktiergarns according to example 1, the copper strand is passed through the fabric with the heating conductor sutured.

By the Kontaktiergarn is an electrically conductive connection between the Heating conductor and the strand produced. The conductive seam becomes perpendicular to Heizleiterrichtung applied as a quadruple seam. The tinned copper strand is laid so that all the points to be contacted of the heating element below lie.

The tinned copper wire is applied by means of conventional copper cables a seat heating power supply known from the prior art connected. The fabric is laminated under the foam Outer material introduced.

Claims (9)

Electrically conductive contacting yarn, comprising at least one non-elastic core thread and at least two electrically conductive threads wound around the core thread, characterized in that the extensibility of the entire electrically conductive contacting yarn is limited by the non-elastic core thread. Electrically conductive Contact yarn according to claim 1, characterized in that as Core thread a polyester thread is used. Electrically conductive Contact yarn according to claim 1, characterized in that as Core thread a polyester multifilament yarn is used. Electrically conductive Contact yarn according to at least one of claims 1 to 3, characterized that it is at least one electrically conductive thread a conductive one Multifilament yarn acts. Electrically conductive Contact yarn according to claim 4, characterized in that as conductive Multifilament yarn a metallic coated synthetic fiber or a stainless steel staple fiber is used. Electrically conductive Contact yarn according to claim 5, characterized in that as metallic coated synthetic fiber silver-coated nylon is used. Electrically conductive Kontaktiergarn according to at least one of the preceding claims, characterized characterized in that the electrically conductive threads in opposite directions to the not elastic core thread are wound. Electrically conductive Kontaktiergarn according to at least one of the preceding claims, characterized characterized in that the contacting yarn for improving the lubricity equipped with an additive is. A fabric comprising at least one electrically conductive contacting yarn according to claims 1 to 8th.