DE102005024432A1 - Production process for a textile surface structure for electrically heated clothes or blankets by machine sewing or sticking incorporates electrically conductive filaments - Google Patents

Abstract

A production process for a textile surface structure by machine sewing or adhesion comprises feeding an upper thread (2) through a textile carrier (3), bringing an electrically conductive filament (1) to the underside of the carrier and winding it around the upper thread so that it is extended and fixed to the carrier. The upper thread is then passed through the carrier to the upper surface. An independent claim is also included for a textile surface structure formed as above.

Description

technical area

The The present invention relates to fabrics, methods for their use Production and use thereof.

Out The prior art discloses numerous electrical heating elements. Such heating elements are used in a variety of technical devices such. B. ovens and kettle used. The heating conductors used are mostly rigid metal bars with diameters in the millimeter to centimeter range of special Alloys complex in electrically isolated form from the environment is complete.

Next These are usually very high temperature generating heating elements increasingly devices manufactured, which include electrical low temperature heaters. Examples of this are underfloor heating, Seat heaters in vehicles and heatable insoles for ski boots. The closer the Heating elements are introduced to the human body, the more important are factors such as flexibility, moisture transport and more tactile Impression.

Optimal would be usable Heating elements incorporated into the surrounding textiles are. Aspirations, such as possible textile Heating elements are the subject of current developments in the areas of seat heaters for Vehicles and electrically heated textiles for winter sportsmen (vests, gloves, Etc.). From the prior art are consuming on a carrier fabric attached, break-sensitive, rigid carbon fibers as well as difficult to process into textiles stainless steel multifilament yarns known. The heating conductors are usually individually sewn Slings at intervals of a few centimeters on the carrier fabric attached. These procedures allow Although a certain flexibility in adapting to the particular application, yet they are due the individual sewing loops very expensive in production. Furthermore the manufactured heating elements are less textile.

One Another approach involves the incorporation of textile heating directly in textile fabrics. Suitable for this purpose are multi-layered silvered nylon yarns and combination yarns, the wires included as a wrap around a core thread. This already heating conductor containing textile fabrics are easy to produce and show when using combination yarns excellent textile properties. The electrical connections can at Use of tissues in the form of inserted conductive warp threads can be realized. adversely is a low adaptability to the respective application and most of the design in clear spatial Distance available electrical connections.

Desirable would be a Method of preparation completely Flexible, textile heating elements that are easy to use with the respective application can be adjusted. Greatest possible flexibility in the Production at the same time favorable Production costs can be reduced by the use of industrial embroidery or sewing techniques be achieved.

The Problems with the processing of said heat conductors on sewing machines are diverse. The Sensitive and relatively rigid carbon fibers can occur during sewing low bending radii do not follow without breakage. The sluggish and abrasive stainless steel filaments damage the eyelets in the needles and allow because of their inertia no big ones Sewing speeds. As heating conductor suitable wires can due to the low bending radii during sewing not be used. Post-plated silver-plated nylon multifilaments can also be used only badly sewn will you lose part of the silver layer at the high shear stresses and show one over the length inhomogeneous resistance distribution.

The mentioned combination yarns can with elastic or inelastic core are produced. The elastic Types are more consistent against stress (stretching, washing, etc.) as the inelastic types. sewing attempts have shown that the elastic types only with extremely lower Sewing speed are processable. The inelastic types are indeed at higher speeds processable, but it comes through the sewing due to the low bending radii again and again to wire breaks. Furthermore proves to be the big one Diameter of the yarns as problematic during processing the sewing machine.

presentation the invention

Here implements the invention. The invention as characterized in the claims is the object underlying textile fabrics available provide, which have an electrical conductivity and high flexibility can be used in various fields.

This object is achieved by the method for producing textile fabrics according to claim 1 and the textile fabric according to claim 11. Further advantageous De Tails, aspects and embodiments of the present invention will become apparent from the dependent claims, the description, the figures and the examples.

The The present invention provides a process for the preparation of a heatable textile fabric through a machine sewing or embroidery process available, being an upper thread to the top of a textile support and an electrically conductive Thread are introduced as a lower thread to the underside of the textile carrier. The upper thread will follow through the textile carrier passed through to the underside of the textile carrier. The electrically conductive thread is looped by the upper thread, causing the electrically conductive thread stretched at the bottom of the textile support is attached. Finally, it will the upper thread through the textile carrier to the top of the textile carrier guided. By the continuous repetition of the mentioned process steps becomes the electrically conductive Thread stretched sewn to the bottom of the textile support.

The inventive method for the production of a textile fabric can be on a commercial Sewing or Embroidery machine realize by the electrically conductive thread as bobbin thread and the tying thread are used as upper thread. It is important to adjust the thread tensions, because the upper thread the electrically conductive Thread not in the textile carrier may pull into it.

In the method known from the prior art is an electrical conductive Thread using a top and a bottom thread at one textile carrier attached. An important criterion for professionally performed machine Sew or Embroidery is the location of the intersection of upper and lower thread. This must always be within the textile carrier, as in this way a sophisticated look of the seam can be combined with an appealing haptic can. The electrically conductive Thread is drawn into the textile carrier by these methods, which makes it to the already mentioned tight bending radii and the Loss of electrical conductivity comes through breakage of the thread.

One central element of the present invention is the realization that is a conductive thread not using an upper and a lower thread at one textile carrier needs to be attached, but that the electrically conductive thread itself used as a bobbin thread in a machine sewing or embroidery process can be. This procedure opens the possibility by adjusting the bias of the upper thread the electric conductive Thread so on the textile support to fix that he is not drawn into the carrier. Of the electrically conductive Thread is stretched in this way attached to the textile support, whereby tight bending radii, which could lead to breakage of the thread, are avoided.

According to one preferred embodiment of The present invention, therefore, the thread tensions of upper thread and electrically conductive Thread set so that the electrically conductive thread is not in the textile carrier penetrates.

The The present invention therefore also encompasses the use of an electric conductive Thread as a bobbin thread in a machine sewing or embroidery process.

In Particularly advantageously, combination yarns used as bobbin thread in such a machine sewing or embroidery process become.

According to one preferred embodiment of The present invention is used as an upper thread, an electrically conductive thread used. Of course the upper thread can be composed of several individual threads, wherein at least one monofilament has an electrical conductivity must have. The electrically conductive upper thread can be used as a contact with external electrical Lines are used.

As already described, machine sewing is most of the time electrical conductive Threads too a break due to low bending radii. Of course exist but threads with electrical conductivity, which cope with such small bending radii without breakage and therefore as electrically conductive Upper thread can be used in the context of the present invention can. However, this does not contradict the present invention underlying task. On the one hand arise in the majority the electrically conductive Threads damage, as soon as as an upper or lower thread during a machine sewing process be used. On the other hand it concerns with the threads with electrical conductivity and small bending radii enabling high flexibility special yarns whose production is associated with high costs. The present invention allows the use of any type of electrically conductive thread as bobbin thread in a machine sewing or embroidery process.

According to a further preferred embodiment of the present invention, an electrically conductive thread or an electrically non-conductive thread is alternately used as the upper thread. The contact points to external electrical lines are in this case by the conductive Ab sections of the upper thread produced while the non-conductive portions have an insulating effect. Again, the upper thread can be made up of several individual threads. The electrical conductivity portions of the upper thread comprise at least one single filament with electrical conductivity. The electrically non-conductive sections of the upper thread can likewise be constructed from a plurality of individual threads, wherein none of the individual threads has an electrical conductivity.

The The present invention also encompasses textile fabrics with a through at least one upper thread on a first surface of a flat textile carrier attached electrically conductive Thread. The guided on the second surface of the flat textile support sections of the Upper thread are substantially parallel to the electrical conductive Thread. The upper thread and the electrically conductive thread are only outside of the textile carrier in contact with each other.

The Problems in the processing of electrically conductive threads on sewing machines can be solved by the electrically conductive Threads through a second thread only brought from one side to the textile support and be attached there by looping of the second thread. The electrically conductive Thread must not, as is usual in sewing, be pulled by the second thread in the surface of the textile support. The second thread is due to its function in the textile fabric referred to as upper thread or tether.

Of the Upper thread takes over the function of fixing the electrically conductive thread on the textile support. He should accordingly have one have sufficient strength and beyond good as an upper thread on a sewing machine be usable.

Of the electrically conductive Thread is attached to a first surface of the flat textile support. The tether is along the second surface of the flat textile support along guided substantially parallel to the electrically conductive thread. Of course this not for the sections of the holding thread that penetrate the textile carrier and with the electrically conductive Thread in contact. Only the sections of the holding thread, the one with the first surface of the textile carrier are in contact, are substantially parallel to the electrical conductive Thread.

In the textile fabrics are the electrically conductive ones Threads with the retaining threads on textile substrates attached. The textile carriers come typically from the groups of fabrics, knitted fabrics, knits, braids or nonwoven materials. The type of carrier is essentially after the application. For the production of heatable textile fabrics for heatable Winter sports jackets are suitable for typical lining fabrics, for example Made of lightweight polyester or polyamide. As a basis for heatable gloves can Cotton fabrics or hard-wearing Nonwovens are used.

When electrically conductive Threads are suitable In principle, most conductive yarns. These yarns come from from the group of metallic wires, braids and threads, the staple fibers, the carbon fibers, which conductively coated Synthetic fibers, the conductive filled Fibers, the conductive polymers as well as the conductive one Combination yarns.

With the use of conductive Combination yarns have the particular advantage that these used in a simple way as bobbin thread of sewing and embroidery machines can be. This allows this type of electrically conductive thread in a particularly simple, faster and cheaper Way on the textile support be attached.

In particularly preferred embodiments The invention relates to combination yarns with an elastic core (eg Lycra), an inner wrapping with a wire (eg silver-coated Copper wire) and an outer wrap with a synthetic multifilament yarn (eg polyester, polyamide) used. The elasticity The yarn gives the electrically conductive thread a good resistance against mechanical stress. Instead of an elastic core can also a flexible, non-rubbery core yarn can be used.

According to one another preferred embodiment In the present invention, combination yarns are considered to be electrical conductive Threads used, the conductive one Multifilament yarns as an inner wrap around an elastic or only have flexible core yarn. For these conductive multifilament yarns these are preferably stainless steel multifilament yarns or silver-coated yarns Synthetic fibers.

According to one another preferred embodiment In the present invention, combination yarns are considered to be electrical conductive Threads used, a wire or a wire thread as an electrically conductive component exhibit. Advantageously, the wire has a diameter from 0.01 mm to 0.12 mm, preferably 0.04 mm to 0.1 mm. Special Benefits arise when the wire is made of silvered copper or Brass exists. Stainless steel or carbon fibers can also be used become.

According to others preferred embodiments a stretched wire is used as the electrically conductive thread. to Stabilization of typically very thin wires and their textile Masking can the wires Wound with synthetic multifilament fibers. This wrap can also be performed twice and possibly in opposite directions. Of course, suitable thus also twisting of individual wires for use as electrical conductive Thread.

The textile properties of the textile fabrics according to the invention hang essentially of the type and workmanship of the electrical used conductive Threads and the textile carrier from. In general, the inventive textile fabrics have and by the methods of the invention produced textile fabrics in appearance, feel and comfort excellent textile properties on.

The The present invention also includes the use of one of the fabric described above, or one of the above-described textile fabrics for the production an electrically heatable garment, in particular a jacket, Trousers, underwear, Socks or gloves. The electrically conductive thread is used as Widerstandsheizleitung used.

The The present invention also includes the use of a a textile fabric produced by the processes described above or one of the above-described textile fabrics for production electrically heated ceilings, electrically heated duvet covers, electric heated curtains and electrically heated car seats. The electrically conductive thread will also in these cases used as resistance heating cable.

The The present invention also includes the use of one of the fabric described above, or one of the above-described textile fabrics for the production a power and / or data conductive garment in particular a jacket, pants, shirt, T-shirt, sports shirt, underwear, socks or gloves. The electrically conductive thread is doing as electrical Used conductor, which serves the power line or the data transmission.

Short description the drawings

following the invention is based on embodiments in connection closer with the figures explained but it becomes explicit noted that the invention is not limited to those specified Examples limited should be. Show it

1 a schematic representation of the course of an electrically conductive thread in a heatable fabric according to the present invention;

2 a schematic representation of the course of a heat conductor in a heatable fabric according to the present invention;

3 a schematic representation of a horizontal section through a heatable fabric according to the present invention;

4 a schematic perspective view of a heatable fabric according to the present invention;

5 a schematic representation of an electrically conductive thread for producing a textile fabric according to the invention;

6 a schematic representation of an electrically conductive thread for producing a textile fabric according to the invention;

7 a schematic representation of an electrically conductive thread for producing a textile fabric according to the invention;

8th a schematic representation of an electrically conductive thread for producing a textile fabric according to the invention;

9 a schematic representation of a garment, which was made from a fabric according to the invention.

Ways to execute the invention

In 1 is a typical course of an electrically conductive thread 1 in a heatable fabric according to the present invention shown schematically.

2 shows an embodiment with two parallel electrically conductive threads 1 in a heatable fabric according to the present invention.

3 shows schematically a horizontal section through a heatable textile fabric. The heating conductor 1 is from the thread 2 entwines and becomes of this on the textile carrier 3 attached. The heating conductor 1 is not, as with ma schinelle sewing or embroidery processes usual in the textile carrier 3 drawn. This puts the thread 2 and the heating conductor 1 only outside the textile carrier 3 in contact with each other.

In 4 schematically is a perspective view of a heated textile fabric to see. The heating conductor 1 is from the thread 2 entwines and becomes of this on the textile carrier 3 attached. The heating conductor 1 is not in the textile carrier 3 drawn. This puts the thread 2 and the heating conductor 1 only outside the textile carrier 3 in contact with each other.

The 5 shows a schematic representation of a combination yarn, which can be used as an electrically conductive thread for producing a textile fabric according to the invention. The combination yarn consists of an elastic core 4 (eg Lycra), an inner wrapping with a wire 5 (eg, silver-coated copper wire) and an outer wrap with a synthetic multifilament yarn 6 (eg polyester, polyamide). The elasticity of the yarns gives the electrically conductive thread good resistance to mechanical stress.

The 6 shows a schematic representation of another combination yarn, which can be used as an electrically conductive thread for producing a textile fabric according to the invention. The combination yarn has a conductive multifilament yarn 7 as inner wrap around an elastic or only flexible core yarn 4 on. In the conductive multifilament yarn 7 it is preferably a stainless steel multifilament yarn or silver-coated synthetic fibers. The outer wrap is a synthetic multifilament yarn 6 (eg polyester, polyamide) used.

The 7 shows a schematic representation of another combination yarn, which can be used as an electrically conductive thread for producing a textile fabric according to the invention. This combination yarn has a stretched wire 8th as an electrically conductive thread. To stabilize the typically very thin wires and their textile masking, the wires with synthetic multifilament fibers 9 be wound. This wrap can also be performed twice and possibly in opposite directions (see 8th ).

Example 1:

One Thread made of textured polyester with 334 dtex and 96 individual filaments (Monofilament × 4) is pretensioned on a yarn-winding machine. The polyester thread is guided through a hollow spindle. These Hollow spindle carries a conical spindle, from the head over a 0.07 mm thick, hard-silvered copper wire is pulled through the polyester thread. The simply wrapped with wire polyester is replaced by a second Hollow spindle out. This hollow spindle carries a commercial one Polyester yarn with 167 dtex and 30 individual filaments. The outer polyester yarn will be in reverse wound to the wire around the core.

The Machine parameters are chosen that a balanced yarn is created, as free as possible from internal torsional stresses is. The outer polyester yarn is wound around the core 1100 times per meter of yarn; the inner wire is wound 950 times per meter of yarn around the core. The inside Wire is approximate Completely from the outside lying yarn, so the yarn on textile look and feel features. The yarn has one excellent electrical conductivity and over a tear resistance of about 42 N.

Example 2:

The yarn produced according to Example 1 is wound onto the bobbin of a commercial sewing / embroidery machine. The upper thread used is a commercially available cotton sewing thread. The embroidery machine comes with the in 1 programmed pattern, wherein the edge length of the pattern is about 12 cm × 12 cm. The thread tensions on the machine are selected so that the combination yarn is not pulled straight into the surface of the carrier fabric during sewing. The textile carrier material used is a commercially available cotton fabric lining. After sewing, a textile heating element with 24 ohms electrical resistance, which heats up rapidly when applying a voltage of 7 V to about 32 ° C to 33 ° C. The heating element shows an unchanged resistance and equal heat radiation after 5 machine washes at 40 ° C.

Example 3:

A combination yarn produced according to Example 1 with a textile core yarn of 1880 dtex Lycra, with an inner wire wrap of 0.07 mm silver-plated copper wire and with an outer synthetic multifilament cover (polyester) is used as a bobbin thread on a sewing machine analogously to Example 1. It will be the in 2 pictured patterns with outer dimensions of 12 cm × 12 cm embroidered. The result is a heating element with 12 ohm resistor. At a voltage of 7 V, the heating element has a temperature of 38 ° C to 40 ° C. The heating element survives 5 machine washes at 40 ° C without damage.

Example 4:

The Heating element of Example 2 is on the side on which the Heating conductors are located, with a thin, covered perforated nonwoven material. On the other side will a 4 mignon cells (AA type, NiMH batteries each with 1.2 V and 2.1 Ah) comprehensive battery pack attached and electrically via a switch with the Heating element connected. In operation, the heating element has a temperature from about 33 ° C up to 34 ° C on.

Example 5:

Of the Heating conductor of Example 3 is applied to the inner fabric of a glove in the area of the fingertips so embroidered that there is a total resistance of 2 ohms (5 parallel heating elements). When investing a voltage of 1.2 V sets a temperature of about 32 ° C to 33 ° C, the from the carrier the glove is perceived as pleasant.

Example 6:

A combination yarn produced according to Example 1 with a textile core yarn of 1880 dtex Lycra, with an inner wire wrap of 0.07 mm silver-plated copper wire and with an outer synthetic multifilament cover (polyester) is used as a bobbin thread on a sewing machine analogously to Example 1. The combination yarn is placed on the inside of a T-shirt in the 9 attached type attached. At the ends of the lines each push buttons are fixed in electrical contact with one line on the shirt. By means of connecting cable are electronic devices such. B. mobile phone, audio players, etc. to connect to the shirt.

1

electrical conductive Thread, heating conductor

2

Needle thread, tether

3

textile carrier

4

core yarn

5

electrical conductive inner, monofilament binding thread

6

insulating outer, multifilament wrapping thread

7

electrical conductive internal, multifilament binding thread

8th

wire core

9

multifilament wrapping thread

10

shirt

11

earphones including plug

12

connection cable

13

microphone

14

power lines incl. holding threads

Claims (25)

Process for the production of a textile fabric by a mechanical sewing or embroidery process with the steps - an upper thread ( 2 ) is attached to the top of a textile support ( 3 ), - the upper thread ( 2 ) is replaced by the textile carrier ( 3 ) through to the underside of the textile carrier ( 3 ), - an electrically conductive thread ( 1 ) is used as a lower thread to the underside of the textile carrier ( 3 ), - the electrically conductive thread ( 1 ) is separated from the upper thread ( 2 ), whereby the electrically conductive thread ( 1 ) stretched at the bottom of the textile support ( 3 ), - the upper thread ( 2 ) is replaced by the textile carrier ( 3 ) to the top of the textile carrier ( 3 ) guided. A method according to claim 1, characterized in that the thread tensions of upper thread ( 2 ) and electrically conductive thread ( 1 ) are adjusted so that the electrically conductive thread ( 1 ) not in the textile carrier ( 3 ) penetrates. Method according to claim 1 or 2, characterized in that as an upper thread ( 2 ) an electrically conductive thread is used. Method according to claim 1 or 2, characterized in that as an upper thread ( 2 ) alternately an electrically conductive thread or an electrically non-conductive thread is used. Method according to one of the preceding claims, characterized in that as an upper thread ( 2 ) an electrically conductive yarn selected from the group consisting of wire, twine, braid, combination yarn, carbon fiber, conductive filled synthetic fiber is used. Method according to one of the preceding claims, characterized in that as electrically conductive thread ( 1 ) an electrically conductive yarn selected from the group consisting of wire, wire twine, twine, braid, combination yarn, carbon fiber, conductive filled synthetic fiber is used. Method according to one of the preceding claims, characterized in that as electrically conductive thread ( 1 ) a combination yarn with a wire ( 5 ) or a wire thread is used as the electrically conductive component. Method according to claim 7, characterized in that the wire ( 5 ) has a diameter of 0.01 mm to 0.12 mm, preferably 0.04 mm to 0.1 mm having. Method according to claim 7 or 8, characterized in that the wire ( 5 ) made of silver-plated copper or brass. Method according to one of the preceding claims, characterized in that as a textile support ( 3 ) a fabric selected from the group consisting of woven, knitted, knitted, braided, nonwoven or foam is used. Textile fabric with a through at least one upper thread ( 2 ) on a first surface of a flat textile support ( 3 ) attached electrically conductive thread ( 1 ), wherein on the second surface of the flat textile support ( 3 ) guided sections of the upper thread ( 2 ) substantially parallel to the electrically conductive thread ( 1 ) and the upper thread ( 2 ) and the electrically conductive thread ( 1 ) only outside the textile support ( 3 ) are in contact with each other. Textile fabric according to claim 11, characterized in that the electrically conductive thread ( 1 ) by exactly one upper thread ( 2 ) on the textile support ( 3 ) is attached. Textile fabric according to claim 11 or 12, characterized in that it is in the upper thread ( 2 ) is an electrically conductive thread. Textile fabric according to claim 11 or 12, characterized in that portions of the upper thread ( 2 ) comprise at least one electrically conductive thread and other portions of the upper thread ( 2 ) consist of at least one electrically non-conductive thread. Textile fabric according to one of claims 11 to 14, characterized in that as an upper thread ( 2 ) An electrically conductive yarn selected from the group consisting of wire, twine, braid, combination yarn, carbon fiber, conductive filled synthetic fiber is used. Textile fabric according to one of claims 11 to 15, characterized in that as electrically conductive thread ( 1 ) An electrically conductive yarn selected from the group consisting of wire, twine, braid, combination yarn, carbon fiber, conductive filled synthetic fiber is used. Textile fabric according to one of claims 11 to 16, characterized in that as electrically conductive thread ( 1 ) a combination yarn with a wire ( 5 ) or wire twist is used as the electrically conductive component. Textile fabric according to claim 17, characterized in that the wire ( 5 ) has a diameter of 0.01 mm to 0.12 mm, preferably 0.04 mm to 0.1 mm. Textile fabric according to claim 17 or 18, characterized in that the wire ( 5 ) made of silver-plated copper or brass. Textile fabric according to one of claims 11 to 19, characterized in that as a textile support ( 3 ) a fabric selected from the group consisting of woven, knitted, knitted, braided, nonwoven or foam is used. Use of a method according to claims 1 to 10 fabric produced or a textile fabric according to claims 11 to 20 for the production of an electrically heated garment. Use of a method according to claims 1 to 10 fabric produced or a textile fabric according to claims 11 to 20 for making a power and / or data conductive garment. Use according to claim 21 or 22, characterized that the garment is a jacket, trousers, shirt, T-shirt, Sportshirt, Underwear, Socks or gloves. Use of a method according to claims 1 to 10 fabric produced or a textile fabric according to claims 11 up to 20 for the production of electrically heatable ceilings, electric heated duvet covers, electrically heated curtains and electrically heated car seats. Use of an electrically conductive thread as a bobbin thread in a machine sewing or embroidery process.