DE2117977A1 - - Google Patents

Description

LAWYER -

DR. JUR. Dl: LC- 'ItA. V / ALTER BEIL 13, April 197f

ALFRED HuSPPCNJ: *

DR. JUR. DiPL-CHcM. H.-J. WOLFP

DR. JUR. HANS CHR. AX

■ i.

FRANKFURTAMMAIN-HOCHSf ADELQNSIRASSt; S8

Our no.17061

Charles Davidoff
Manhasset, ILY., V.St.A.

Flexible fibrous sheet material and method for the same Manufacturing.

The invention relates to flexible, fibrous film material with metallic, electrically conductive or magnetizable Elements and processes for its production,

Fabrics of the type described above are self-evident known. For example, such Ge fabrics can be made and maintained on either or both Surfaces uniform or patterned layers of metal or metal-containing paint, varnish, varnish or plastic wear and which are decorative or as magnetic or electrical components such as a printed circuit board

or the like are suitable. There are also known fabrics that are spaced apart or in a fixed arrangement Contain metal threads or strips that serve a particularly desired electrical function.

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However, these and similar products are not entirely satisfactory, for a number of reasons such as: a decreased flexibility due to the use of solid continuous metal strips, threads and layers, whereby the adhesion of thread to thread or thread to thread is a prevents free independent relative movement; Flaking or deposition of metallic or metal-containing layers from the surfaces of the base fabric; faster penetration of the metal strips, threads and layers due to their relatively low fatigue strength under the Conditions of repeated bending or continuous bending; insufficient Springback after the action of deformation forces such as rolling, bending, folding, compressing, denting and wrinkling; relatively high manufacturing costs these products due to special requirements on the fabric or large amounts of metal or the like; excessively high gross weight of these metalliferous Products and the like.

The aim of this invention is to provide a flexible, fibrous sheet material with metallic, electrically conductive and magnetically conductive elements, which has the disadvantages and deficiencies listed above. Another object of this invention is to provide a material that is substantially uniformly flexible, regardless of the presence and / or location of the metallic elements therein, and to provide a material that has flexibility, drape and grip strength. handles feel), a weight and / or a fatigue strength that corresponds essentially to the properties that the same material has without such metal elements. Another object of this invention is to provide a material in which the metal -

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elements bility improved properties in terms of duration, fatigue resistance, have jerk suspension after the action of deformation forces, electrical conductivity and / or magnetization, and the like, as well as providing a material _s is the relatively inexpensive and easy to manufacture. Another goal of Koch is to provide processes for the manufacture of this material.

The achievement of the above-mentioned objects is made possible by the present invention, which the Providing a flexible, fibrous sheet material comprises, the individual fiber units of which are non-electrically conductive and non-magnetizable, the material has individual areas and patterns in which the fiber units from one surface to the corresponding opposite surface coated with a film of electrically conductive or magnetizable metal are.

in particular, the inventive material described above possesses all or substantially all properties listed in the preceding paragraph which constitute the objects of the invention.

The individual flexible fiber units of the invention fibrous sheet material can comprise, consist or be constructed from any desired fibrous or thread-forming material that is not electrically conductive and non-magnetizable. The fabric can of course or synthetic, organic or inorganic, homopolymer, copolymer (of two or more monomers) or mixtures

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from two or more prepolymerized monomers, optionally in a mixture, with common auxiliaries, modifiers, Plasticizers, plasticizers, dyes, stabilizers, fillers and the like. Such fibrous or thread-like substances are, for example, vegetable (cellulose) fibers such as cotton, hemp, linen, Flax and the like; animal fibers such as silk, wool, hair, fur or similar protein fibers; natural and synthetic inorganic fibers such as asbestos, wood asbestos (?), non-alkaline, borosilicate and other silica glass fibers; semi-synthetic fibers such as regenerated cellulose or viscose silk, cellulose acetate, gum, regenerated animal and vegetable proteins such as casein and Zein; Synthetic organic polymer fibers and threads, Copolymers and mixed polymers such as polyvinyl chloride, polyvinylidene chloride, vinyl chloride-vinyl acetate copolymer, Polyolefins such as polyethylene and polypropylene, polyacrylonitrile, modified acrylic acids, acrylic and Methacrylic acids and their methyl and ethyl esters, polyesters such as polyethylene ent erephthalate, polyurethanes such as spandex, linear super polyamides such as nylon and polypyrrolidone, Tetrafluoroethylene, polyorganosiloxanes, polyvinyl ether, maleic anhydride copolymerized with ethylene monomers such as ethylene, methyl vinyl ether, styrene and the like, butadiene-styrene copolymers and synthetic rubber and the like, and mixtures and copolymers of the above compounds.

A number of such fibers, threads and fabrics are in the Commercially available, is.B. Vinyon, Saran, Velon, Dynel, Arril, Celanese, Aerilan * Orion, Dacron, Terylene, and the like.

The expression "fiber unit ¹ · is intended to, in addition to yarns, the

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include individual filaments and threads, twisted and untwisted Bundles of such cords and threads, all of which, for Production of the flexible, fibrous film material used here can be used. The foil material can be made in any way, such as by Papermaking processes, felting, matting, weaving, knitting and the like, and mixtures of fibers, Threads, yarns and the like made from various polymers Basic materials as described above include.

The fibers, threads and fiber units contained in the film material according to the invention are known and available in the stores. Their structures, properties, chemical compositions and the like are not critical and per se not part of the invention. For example, the fibers and threads can be any size and Have shape that allow the usual flexibility of such a material. Their cross-sectional shapes can be symmetrical or asymmetrical, round, elliptical, flat, triangular, polygonal, multi-lobed, etc., and they can a thickness or diameter in the range of from about 0.5 or less denier to 10 or more denier or from about 1 or less microns to 40 or more microns. They can be short, staple fiber lengths or continuous Be threads, and the twisted or untwisted yarns or bundles containing them can be any Number such as 2 to 150 fibers or threads or more im Contain cross-section and have a gauge in the range of 20 or less denier to 200 or more denier. Staple fiber lengths are generally used to produce matted or matted, flexible, fibrous sheet material necessary. Aue yarn and similar ma -

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material can have a desired knitted structure or a Weave like plain weave, "rip stop", twill fabric, leno fabric 'and the like, and an open or relatively closed, dense construction have a weight in the range of, for example, about 3.39 g / m (0.1 oz /

sq.yard) to 542.5 g / m (1 pound / sq. yard) or more, usually about 16.95 to 339.1 g / m ² (0.5 to 10 oz / sq. yard) , preferably a relatively light, dense fabric
yard).

Fabric from about 16.95 to 101.73 g / m (0.5 to 3 oz./sq.

for most of the purposes listed here and the desired properties such as flexibility, durability, Strength, weight and metallization are preferred Woven fabrics made from continuous thread yarns based on polyester, polyacrylonitrile, silk, glass and in particular Nylon used. In these, as well as the other types of foil material used herein, as described above the individual flexible fiber units, as they are usually available, are essentially made of fibers not connected to the adjacent fiber units and can be moved freely in relation to them, rotate or move. In other words, the individual Fibers, threads, yarns and the like in the material can be moved independently of one another, as they do not have anything at their points of contact or intersection with one another are connected, and they are limited in their mobility only by the type of fiber unit structure or fabric.

According to the present invention, the above-described fibrous sheet material, its individual Fiber units not electrically conductive and not

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are magnetizable, provided with individual areas or patterns in which the fiber units are coated from one surface to the corresponding opposite surface of the material with a film of an electrically conductive or magnetizable metal. In order to keep the flexibility, grip, fatigue strength, and the like of the product substantially uniform on both the coated and uncoated surfaces, the thickness of the continuous metal film is relatively small, about 2.54 × 10 to 1.02 χ 10 ~ ⁴ cm; preferably about 5 * 08 χ 10 to 15.24 x 10 cm. Just like the non-coated fiber units, the metal-coated fiber units are essentially not connected to one another and can be moved, rotated or shifted independently of one another. The metal-containing patterns in the products according to the invention are independent of the structure of the fibrous sheet material, that is to say regardless of whether it is felted, twisted or woven, and of the direction, size and shape of the fiber units, etc. In other words, the demarcation lines that form the separate metal-containing patterns or areas from the uncoated insulating areas of the material, in essentially all cases cross fiber units, whereby a section or more of the crossed fiber, thread, yarn, etc. is coated with a metal film and lies in the metal-containing pattern, and the other portion of the same fiber is uncoated and is outside the pattern and within the insulating areas.

The metal coating or film can normally be used by anyone solid film-forming metal since essentially all of these metals are electrical to some degree

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are conductive or magnetizable. Hence the metal for example silver, gold, platinum, palladium, copper, aluminum, nickel, cobalt, iron, titanium, molybdenum, chromium, Tungsten, lead, tin, zinc, cadmiumj manganese, antimony, germanium, Indium, rhenium, ruthenium, rhodium, selenium, rare metals and the like, and mixtures and alloys of be any two or more metals of this type. in the

Generally iron, cobalt and nickel as well as their mixtures and alloys are used for magnetic properties and gold, platinum, palladium, aluminum, copper and especially silver as well as their mixtures and alloys for electroconductivity is preferred.

To produce the metallized according to the invention Several methods can be used with pattern-containing flexible fibrous sheet material. According to the preferred The process is the metal film coating only in certain areas of the one surface up to the appropriate opposite surface of a flexible fibrous sheet material removed from the fiber units, wherein the individual fiber units are not electrically conductive and not magnetizable and with a continuous Film of an electrically conductive or magnetizable metal are coated.

In the method described above, Starting material used a flexible, fibrous sheet material, which in the whole of the desired separate metallized surfaces or patterns, i.e. in which all individual non-electrically conductive, non-magnetizable Fiber units with a continuous film of an electrically conductive as described above

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the or magnetizable en metal are coated.

This starting material, the electrical resistance values from about 0.01 to 500 ohms per square (0.01 to 500 ohms per square), and preferably about 0.5 to 5 ohms per square Area (0.5 to 5 ohms per square) for purposes more optimal Has electrical conductivity is known and commercially available. It can also be known after and in numerous Processes described in patents and other publications are produced, which generally involve a metallization treatment carried out in a known manner a non-electrically conductive, non-magnetizable flexible fibrous sheet material, to apply the desired continuous metal film to the individual fiber units, or in which are attached a similar treatment of the individual fiber units Processing of the obtained metal-coated fiber units into a flexible fibrous sheet material.

See U.S. Patents 2,511,472, 2,867,552, 2,896,570, 2,897091, and 5,043,796 for illustration with regard to the disclosure of such metallization treatment of non-electrically conductive, non-magnet! si erable Fibers, threads, yarns and fabrics are referenced. In the U.S. Patents 3,862,783 and 3,014,818 Plating treatment of surfaces can also be used, but only for plating of non-electrically conductive, non-magnetizable Fiber units and not for the latter two Metal-containing fae units described in patents.

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Generally, this includes plating treatment the reduction of a salt, a salt mixture or other reducible compounds of the selected metal or the metals that are deposited in situ on the surface of the fiber unit as their aqueous or organic solution, or a "gas plating", one of which is thermal decomposable gaseous compound of the selected metal or a mixture of such compounds of the metals in is thermally decomposed in situ on the surface of the fiber unit.

The removal of the metal film from the fiber units in the areas of the sheet material that are intended to be insulating, ie the areas that do not belong to the discrete areas or patterns in which the fiber units are coated with metal, is achieved by selective treatment of these areas with a fluid that is a solvent for the metal. The fluid can be gaseous or liquid and the solvent used in each case depends, of course, mainly on the metal to be removed or dissolved. These solvents or metal strips are usually liquid and inorganic, with optional additives which may be organic, and are known and commercially available. Through the usual reference to standard texts and literature sources, the substances effective for the specific metals to be removed are named, such as the metal strippers and processes, described in the chapter "Stripping Metallic Coatings ¹¹ , pages 507 to 517 in" Metal Finishing Guide Book 1968 " , published by Metals and Plastics Publications, Westwood, New Jersey, which is hereby incorporated by reference. Acids are generally used as such solvents, but they must be made obvious

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Reasons can be selected depending on the metal to be removed. Dilute nitric acid dissolves silver, copper, cobalt, iron and nickel; hot or concentrated sulfuric acid dissolves silver, copper, cobalt, aluminum and palladium; and aqua regia dissolves gold and platinum.

The duration and temperature of the metal solvent treatment depends of course on the thickness of the metal film on the treated fiber units. In general Temperatures ranging from room temperature to about 90 ° C can be used, the higher temperatures in this. You can generally accelerate the solution process. For practical reasons, the duration should not be longer than about 30 minutes in each individual case, however, in most cases, treatment should be stopped when all of the metal is in the insulating material Areas is resolved. This is particularly important if the solvent is fresh after the metal film has been removed attacks exposed surfaces of the fiber units themselves, unless you have nothing against it or want it this even for certain purposes up to total destruction.

Since the attack of the fiber he units through as such the solvent should be avoided in most cases, and such attacking certain fibers through Acids often difficult to control is called solvents or strippers for the metal an alkali metal, e.g., sodium or potassium cyanide, generally in the form of a aqueous solution with a concentration of about 0.5 to 10 wt .- # is used. Certain known auxiliary substances can also be used such as hydrogen peroxide, m-nitrobenzoic acid, sodium m-nitrobenzoic sulfonate and the like of the cyanide solution generally in concentrations of about 0.1 to 10 wt .- # can be added. The solving process can be done with

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Metals such as platinum and palladium are accelerated even further by a simultaneous mild electrolytic effect, by removing the parts of the fibrous metal coated Materials that are in contact with the solvent, with a source of alternating current with lower Voltage in a conductive, corrosion-resistant metal container, which is also connected to the same power source. It has been found that the metal stripper solutions anö alkali metal cyanide is particularly advantageous are disadvantageous for the rapid removal of the metal film Effect on the fiber units as such under the usual temperature and time conditions of such solvent treatments.

The following are examples of some metal solvents or metal stripper solutions listed that are used in the preparation of the above-described inventive Products can be used.

Example At

NaCF or KCN 28.35 g

Water ad 3.79 liters
Applied at 32-82 ⁰ C

Example B;

NaCN or KCN 50 g

Water ad 1 liter
Applied at 21 - 71 ° C

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Example 0:

NaCN or KCN 28.35 g

conc.) - 0.5 volume #

Water ad 3.79 liters
Applied at 21 - 71 ⁰ C

Example D:

NaCN or KCN 28.35 g

H ₂ O ₂ (30 # conc.) - 3 vol -96

Water ad 3.79 liters

Applied at room temp. up to 21 - 71 ° C

Example B:

NaCN or KCN 50 g

m-nitrobenzoic acid 50 g

Water ad 1 liter
Applied at 50-7O ⁰ C

example ff? NaCN or KCN 50 g

Sodium m-nitrobenzoisulfonate 50 g of water until 11 is reached. Applied at 50-7O ⁰ C.

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The selective treatment of certain areas of the fibrous film starting material, the metal-es chi cht et e fiber units contains, using the metal stripper solvent to dissolve the metal only in these areas in various ways, discontinuously or continuously, be performed. For example, the goal can be achieved in that these areas of the effect of a direct electricity; Jet or spray of metal solvent ^ until the metal dissolves in these areas, after which these areas are preferably exposed or washed or rinsed all material with, water to remove all traces of the metal compound, the dissolved metal and the metal oiling agent. Complete removal can then be determined if determined by suitable instruments and measuring devices became that these areas are not conductive.

According to another method, the treatment with the metal stripper is limited to certain areas, by the metal-coated fiber units of the remaining Surfaces and patterns of the fibrous sheet material is provided with a coating that opposes the effect of the metal stripper is resistant, and then preferably removed after treatment. The selective application of this resistant coating on the metallized ones Areas and patterns that are to be protected from the action of the metal stripper can in turn according to different procedures can be achieved.

According to one of these methods, the resistant coating can in a known manner in a screen printing or Stencil process are applied. Any suitable, preferably

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removable, film-forming material such as a film solution, a varnish or the like can be used. An example for a suitable material is a varnish, the cellulose nitrate, (xlycol sebacate plasticizer, G-lycerin phthalate resin, dissolved in one or more volatile solvents such as toluene, butyl acetate, butyl alcohol, ethyl acetate and methyl ethyl ketone, contains. Another suitable material is a film liquid (dope), the cellulose acetate, plasticizer such as dibutyl tartrate and diethyl phthalate, dissolved in a similar volatile solvent such as acetone, etc. contains. The solvent used for the resistant protective coating in each case should of course be so be chosen so that it attacks the metallized spring units to be coated only slightly or not at all.

The resistant protective coatings described above must be applied in such a way that the metal-coated fiber units of the surfaces and patterns which are to remain electrically conductive or magnetizable are coated from one surface to the corresponding opposite surface of the material. The metal stripper can then click _the: entire sheet material, for example by dipping or the like are applied, dissolved the material whereby the metal in the remaining unprotected areas and is removed. If the metallized areas or patterns need to be exposed, as in uses involving electrical contact with the surfaces, the tough protective coating is removed by treatment, for example dipping or otherwise, with one or more of the aforementioned volatile solvents.

In another method of selective application a resistant protective coating on metallized

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Areas or patterns that are in front of the action of the stripper solvent are to be protected, - known light protection compounds are used; according to this procedure, the entire metallized fibrous sheet material with a coated photosensitive (photohardenable) soluble film-forming material that can be made insoluble When exposed to actinic or UV rays, the coated metallized fibrous material can only ™ on the corresponding opposing surfaces of the individual metalized areas or patterns, e.g. by using suitable image carriers that are matched to one another or negatives, exposed to such radiation as to make the coating insoluble in these areas and patterns make all the fibrous material washed to the soluble light protection coating remaining in the remaining unexposed areas of the fibrous material remove, and then all of the fibrous material subjected to the action of the metal stripper to remove the metal remove in the unexposed areas. The insoluble light protection coating in the metallized ~ Areas and patterns can remain or be projected through ™ The prescribed solution treatment or treatment with suitable alkaline or acidic solutions can be removed.

There are many known light protection compositions and methods used in the method described above can be. Such masses are, for example, 5-10% strength by weight aqueous solutions of gelatin, albumin, Glue, gum arabic, polyvinyl alcohol, carboxymethyl cellulose or the like containing about 1-4% by weight of potassium dichromate sensitizers and optionally small amounts of plasticizers, wetting agents and the like

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contain. When these are applied to the metal-coated fibrous starting material and dried, the surfaces or patterns exposed to actinic radiation - such as a carbon arc or mercury vapor lamp or other high-energy light rays, are made insoluble and hardened, whereupon the entire fibrous material is exposed to warm water , is washed as described for the soluble, non-hardened light stabilizer coating from the unexposed areas to be removed, and with the metal gonorrhea, for example, in the examples A to F, treated to remove the metal.

Another well-known light protection compound is "cold top enamel ", a mixture of shellac and ammonium dichromate in water whose pH is with ammonia, borax or a Carbonate was adjusted to about 9 »0. This light protection compound is used in a similar way, with the areas that are not exposed to UV radiation being water-soluble and are not hardened and can be removed with water.

Another well-known light stabilizer is that Kodak light stabilizers, usually called KPS, based on light-curable, film-forming Polyvinyl cinnamate, preferably with any of the numerous known sensitizers is further sensitized. Coatings that are exposed to UV rays are insoluble and hardened, leaving the fibrous The material is then "developed" by treatment with an organic solvent such as trichlorethylene uncured KPR coating from the unexposed areas to remove. Similar synthetic light protection compounds, which do not use organic solvents

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means for developing the unexposed areas have as the basis earboxyl-containing polymers such as Polyvinyl cinnamate succinate and phthalate, with developing is performed durehge with an aqueous alkaline solution. As can be seen, the nature of the will develop (Removal of the uncured coating from the unexposed areas) and, if necessary, to the subsequent one Removal of the exposed, hardened protective coating The solvent used depends on which of the Tl el s known light protection materials in the respective Case was chosen.

It will be understood that in those described above Method using light protection masses In all corresponding patterns appear on opposite surfaces of the coated with the protective agent, metallized fibrous material must be exposed to UV rays or other light sources to which the protective material is sensitive, e.g. by using identical image-bearing films (imaged films) or glass image carriers (transparencies) placed side by side in register on these opposing surfaces, and that both films exposed to the light source required for curing.

In. the image-bearing films or glass image carriers the unpigmented clear transparent surfaces that transmit the light energy, of course the surfaces or Patterns of the metallized fibrous material coated with the protective compound correspond, which remain metallized and protected from the action of the metal stripper should.

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According to a preferred method for the selective treatment _r of certain areas of the metallized fibrous starting material with the metal stripper to dissolve the metal ^ exclusively in these areas, the treatment of the starting material is carried out while it is being pressed between fixed plates, which are provided with mated openings that correspond to these specific areas. As a result, the metal solvent can only come into contact with these areas of the material and is prevented by the plates from coming into contact with the other surfaces or patterns that must remain metallized. The plates are preferably made of a rigid material that is resistant to the action of the metal solvent, for example steel, glass, synthetic resin and the like, and are provided with clips or other devices with which the metallized fibrous material is firmly pressed therebetween to the To keep the possibility low that the solvent seeps laterally into the areas of the pressed fibrous material located next to the gaps and outer edges of the plates. As a further means of preventing such seepage, the inner surfaces of the panels in contact with the compressed fibrous material are preferably resilient, for example by being provided with thin layers of resilient synthetic rubber or with closed cell foam serving as a seal.

The entire assembly is then immersed in a bath of the metal solvent as described in Examples A through P until all of the metal coating is in the

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Areas of the fibrous material in the openings exposed, is solved. The assembly is then removed from the metal stripper bath, carefully washed with water, unclamped or taken apart.

The products of the invention are electrical to many and magnetic purposes. So they can Areas or patterns in them that form the metal-coated

Fe fiber units contain at least part of an electrical Circuit or a capacitive circuit, an antenna or a dipole, magnetizable elements or the like. The above-described particularly advantageous properties of these products make them suitable for a number of new uses. The metallized pattern exists in the form of an antenna of changing geometry such as a dipole or the like, the product can be used for the purpose of determining its location invisible in a curtain or the lining, label or other part of clothing Detection of shoplifters at the exits of clothing stores. The metallized

fe patterns can be a number of separated 2.54 cm Be squares so that the product can serve as part of a flexible, invisible capacitive circuit. A product with a pattern in the form of a tape or series of tapes of electrically conductive metal-coated Fiber units can be a useful contact line as a connecting part between a human body and a medical instrument such as an electrocardiograph represent. Or it can be used as an electrical circuit who are incorporated into the costume of an artist

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is worked on, e.g. in the skirt of a dancer who is used for Could be electrified for low voltage lighting purposes. Or it can be used as an electrical connection at the end of a flexible banner such as a

fluttering, waving flags. Pattern in the form of parallel strips of magnetizable, metal-coated Fiber units allow them to be used as new Kind of a multi-track tape.

The following examples serve to provide a more detailed explanation the invention.

Example 1;

A 0.09 m Uylon cloth weighing

33 »9 g / m» the 40 denier yarn made from continuous, with a 5 $ 08 - 12.70 χ 10 cm thick silver film coated threads was placed in an aqueous bath of a light protection composition containing about 10 wt .- ^ gelatin and Contains 3 wt .- # potassium chloride dichromate, carefully immersed wetted, then taken out and in a dark Tree dried on a stenter.

2.54 cm square, 2.54 cm apart, Corresponding patterns on opposite surfaces of the metallized coated with the light protective compound Lynx were then exposed to carbon arc radiation for a few minutes (e.g. 4-12 minutes), the exposure on both surfaces by a matching black film containing the same spaced transparent 2.54 cm squares

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te took place until the protective coating in the exposed Surfaces had been fully hardened and made insoluble.

The cloth was then used to remove the uncured light protective coating in the exposed areas Washed the cloth with warm water, taking 2-5 minutes Agitation in a metal solvent bath as described in Example D. immersed until the metal film is in the same, unexposed areas that are not covered by the hardened light protection mass are protected, removed by dissolving had been. The complete removal of the metal film these areas were found to be non-conductive when tested with an ohmmeter was. The product obtained, with a pattern of recurring 2.54 cm metalized squares surrounded by insulating areas of the cloth, serves as part a flexible capacitive or inductive circuit.

Example 2s

A ^ i-treated as in Example 8.89 cm wide and 48 cm long 30 _s metallized Nylontuoh was clamped x 30.48 cm rigid steel plates between Awei 8.89, respectively, with matching 1.27 cm wide and 29 " 2 cm long, evenly spaced over the width and length of the plates arranged columns or openings were provided. The inner surfaces of the panels, which had no openings and which bordered the compressed cloth, were each provided with a 127 / <► thick layer of heoprene rubber, which was inserted between the panels at the edges between the panels and into the surfaces of the to the , Openings and outer

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Edges of the panels adjacent compressed cloth as Seal served.

The entire clamped assembly was then agitated for approximately 4 minutes with the bath and / or assembly immersed in a KGN metal stripper bath as described in Example A at about 49 ° C. until the entire silver coating in the areas of the cloth that were exposed through the openings, had been removed by loosening.

The arrangement was then taken out of the bathroom, carefully washed with water and unclamped or taken apart. The product corresponded to the initial one silvered cloth, except that it desilvered three equally spaced 1.27 cm wide and 29 »2 cm long, contained non-electrically conductive tapes corresponding to the openings in the plates. The 0.635 x 8.89 cm large strips of silver-plated cloth between the ends of the non-conductive tapes and the edges at each end of the cloth were cut away, leaving a pattern of four parallel 1.27 cm wide, silver-plated electrically conductive tapes were left, separated by three desilvered tapes were insulated »6 - if necessary, the plates could also do so be constructed that directly the same belt-shaped article is produced without the two ends subsequently have to be cut away.

The manufactured product can be used as part of an electrical circuit, e.g. as a contact line between a Humans and an electrocardiograph or another medical instrument or as a feed or control component of an electronic information memory or retrieval machine will. When used as a contact

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conduction in humans, this product conveys the warm, non-metallic feel of a soft, comfortable band in contrast to the currently used cold, relatively rigid metal cable line. A similar product containing iron, nickel and / or cobalt instead of silver is as a flexible magnetic tape or other recording component of a magnetic storage device (memory de vice) suitable.

The above description and working examples relate to a generally preferred method of manufacture the products according to the invention containing metallized patterns, the selective A removal of the metal film coating from certain areas of a fibrous sheet material, in which all fiber units are coated with a metal film. The reverse process of a direct metallization of individual areas or patterns of a non-metallized fibrous film material also used for the production of the products according to the invention will.

In this direct metallization process, the fiber units from one surface to the corresponding opposite surface in individual areas or patterning of the flexible fibrous sheet material, the individual fiber units of which are not electrically conductive and are not magnetizable, with a substantially continuous Film made of an electrically conductive or magnetizable Metal coated. It will be apparent that a metal stripping step is avoided in this process.

The limitation of direct plating treatment the individual, desired surfaces or patterns can be pre-

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preferably according to example 2 -be achieved, e.g. by a similar but non-metallized nylon cloth was compressed between the same apertured plates and the entire arrangement then any known, as described above Is subjected to plating treatment such as a Reduction of a salt or salt mixture or other reducible ones Compounds of the selected metal respectively. the selected metals in an aqueous or organic solution, or it is preferably the "gas plating" i.e. the thermal decomposition of a thermally decomposable gaseous compound of the selected metal BEZW. of metals or their mixture in situ on the surfaces of the fiber units applied in the exposed, apertured areas of the assembly.

In the above description, the term is intended to be referred to continuously or substantially continuously on the metal film coatings in the individual areas or patterns of the products according to the invention mean that the Coatings must be at least sufficient to provide an uninterrupted electrically conductive metal path over the length of the To obtain fiber unit. In most cases that makes up Film a continuous coating on the entire surface of the fiber unit with the exception of small holes, Cracks, etc. that occur in the plating process. A relatively thin metal film is required to achieve the Maintain flexibility and avoid shattering, breaking or to prevent other permanent defoimation effects, which tend to occur with thicker metal films and solid metal threads (including wires) and layers.

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Claims (1)

Patient entanspiü eh e; 1. A flexible fibrous film material, the individual fiber units of which are not electrically conductive and not magnetizable are, characterized in that this material has individual areas or patterns in which the Fiber units from one surface to the corresponding opposite one Surface are coated with a film of electrically conductive or magnetizable metal. 2. Material according to claim 1, characterized in that its individual fibers contain ei nh ei th nylon. 3. Material according to claim 1, characterized in that its individual fiber units polyethyl enterephthalate contain. 4. Material according to claim 1, characterized in that that its fiber units contain polyacrylonitrile. 5. Material according to claim 1, characterized in that its individual fiber units contain silk. 6. Material according to claim 1, characterized in that its individual fiber units contain glass. 7. Material according to claim. 1, characterized in that the metal is silver. 8. Material according to claim 1, characterized in that that the metal is gold. 9. Material according to claim 1, characterized in that that the metal is platinum. 10. Material according to claim 1, characterized in that that the metal is nickel, cobalt, iron or a mixture or alloy thereof. 11. Woven material according to claim 1. 12. Material according to claim 1, characterized in that substantially all of the fiber units are not with the adjacent fiber units are connected and rela- tively length to this move freely, rotate or slide. 15 · Material according to claim 1, characterized in, that there are essentially uniform properties of flexibility, grip and properties throughout the entire material the fatigue strength has similar to those that the material has without these metal-coated fiber units. 14, material according to claim 1, characterized in that these surfaces or patterns are at least part of an electrical Circuit, an antenna or a dipole 109850/17 98 - 29 places. 15. Material according to claim 1, characterized in that that these areas or patterns are at least part of a capacitive circuit. 16. Material according to claim 1, characterized in that these surfaces or patterns are magnetizable elements. 17. A method for producing a material according to claim 1, characterized in that the metal film coating only in certain areas of one surface up to the corresponding opposite surface of one flexible fibrous sheet material, its individual fiber units electrically non-conductive and non-magnetizable and with a film of electrically conductive or magnetizable em metal coated is removed from the fiber units. · 18. The method according to claim 17 »characterized in that that you can remove it by treating this certain areas with a fluid that is a solvent for this metal film coating is carried out. 19 .. The method according to claim 18, characterized in that that the treatment is limited to certain areas by uniting the metal-coated fibers first provides a coating in the remaining surfaces or patterns of the fibrous film material, the fluid that is resistant to the metal-removing 109850/17 capable of removing this coating after the treatment. 20. The method according to claim 19 *, characterized in that that the resistant coating according to buckets SL ebdruekoder Stencil process applied to the remaining surfaces or patterns of the fibrous sheet material will. - 21. The method according to claim 19, characterized in, that the resistant coating on the remaining surfaces or patterns of the fibrous sheet material is applied by removing the entire metal-coated fibrous sheet material with a photosensitive soluble flimb lld end en material produced by actinic radiation can be made insoluble, is coated and the photosensitive material is then only in these other areas or patterns of the fibrous film terials is exposed to actinic radiation. 22. The method according to claim 18, characterized in that the treatment of the metal-coated fibrous Sheet material is passed while it is pressed between solid plates provided with openings corresponding to the specific areas, whereby the fluid does not interact with the other surfaces or Patterns can come into contact. - 23. The method according to claim 22, characterized in that that plates are used whose with the fibrous Foil material in contact with surfaces are elastic. 24. Method of making a material
according to claim 1, characterized in that the fiber units in individual areas or patterns of the flexible fibrous film material, the individual fiber units are not electrically conductive and not magnetizable,
are coated from one surface to the corresponding opposite surface of the flexible fibrous sheet material with a film of electrically conductive or magnetizable metal. For: Charles Davidoff Lawyer 1098507 17