EP1081273A2 - Floor covering with an electroconductive top layer - Google Patents

Abstract

The electrically conductive elements (4) are guided through the bottom layer (3). The conductive elements (4) are nails or clips. The covering is fixed to a floor with a conductive adhesive via its bottom layer (3), and the conductive top layer (2) consists of a pile.

Description

The invention relates to a floor covering with an electrically conductive Top layer and an electrically insulating bottom layer and a method for the production of a floor covering.

For electrostatic charges when walking on floor coverings and Avoiding carpets in particular have been antistatic Developed flooring. The invention relates in particular to antistatic carpets that are used as tile material or as sheet goods getting produced. Here, an antistatic fiber material on the Top of the carpets provided for static electricity too avoid. For this purpose, metal fibers are worked into the carpets or fibers coated with conductive polyamide are used. The use of carbon in the fiber material also leads to a Increasing the electrical conductivity and thus reducing the static charge. In addition, fiber materials can also be added subsequently using salts or glycol products more conductive than usual pile materials be designed.

The pile materials are on a first back as loops or velor attached and this first backing has an antistatic carpet electrically conductive base coating, which is usually a carbon coating is. Even the base coat or the backing can however, be made conductive by the above-mentioned methods.

The pile attached to the back is usually by means of a Cashmere glue attached to a felt or similar backing. The second back consists of a textile material, polyvinyl chloride, EVA (Ethyl vinyl acetate) bitumen or the like. These materials form one Underlayer that is not electrically conductive or only to a very limited extent and mainly dimensional stability and impact sound insulation serves.

The invention has for its object a generic floor covering develop in such a way that the antistatic properties of the Flooring to be improved.

This task is done with a floor covering with an electrically conductive Upper layer and an electrically insulating lower layer solved, in which according to the invention electrically conductive elements through the lower layer are led.

The invention is based on the finding that an electrically conductive Top layer for a balanced electrical charge on the top of the Flooring provides, but the grounding of the electrical charge is often insufficient is. A suitable derivation of the surface tension by a Connection to electrically conductive radiator pipes or the like is complex and in many cases not possible.

By passing electrically conductive elements through the electrically insulating underlayer becomes an electrically conductive connection between the top layer and the one under the floor covering Material reached.

The electrically conductive elements thus ensure potential equalization between the electrically conductive top layer and the material below the carpet such as the screed or one Concrete layer.

Especially when using tile materials, the Use of a conductive adhesive prove to be advantageous. This is on the one hand inexpensive and on the other hand ensures a good and even derivation of the voltages. The adhesive layer can with a Earth.

Fortunately, it has been found that these elements are easy to find in the Flooring can be incorporated and the electrostatic properties greatly improve the flooring. Can do more as needed or less electrically conductive elements are used that are preferably arranged evenly distributed in the flooring.

The invention is particularly suitable for carpets in which the electrical conductive top layer is a pile. Both with velor and with Loop fabric creates an electrostatic effect when the floor covering is walked on Charging by the well-known types of treatment of the Fiber material is often not reduced to a sufficient extent can.

This also applies to floor coverings in which the electrically conductive top layer has an electrically conductive base coating. An electric one Conductive base coating is to improve the electrostatic Properties advantageous, but particularly good results are achieved by achieved the use of the electrically conductive elements according to the invention.

Since there is usually an electrical connection between the upper and lower layers non-conductive adhesive layer is arranged, it is proposed that the electrically conductive elements are passed through the adhesive layer. This also allows a good derivation of the electrostatic potential Use of non-conductive glue between the top and bottom layers.

The described invention is particularly relevant when the lower layer has a greater thickness than the base coating. For carpets usually the second back made of felt, for example, is thicker as the base coating and this makes a particularly good electrical Isolation achieved. However, the thickness of the insulation layer is in use the conductive elements according to the invention no longer disadvantageous for the antistatic properties of the flooring.

This applies especially to situations in which the lower class consists of one impact sound absorbing material is made. This material is common relatively thick and has particularly good electrical insulation properties on.

See an advantageous embodiment of the floor covering according to the invention before that the electrically conductive elements as nails or U-shaped Brackets are led from the bottom to the top. Through the thickening the head of a nail or the one between the legs Base area of a U-shaped bracket creates an electrically conductive Contact surface on the underside of the flooring. This contact surface can arbitrarily through the design of the electrically conductive elements can be enlarged in order to derive the electrical potential to the to facilitate the underlying floor area.

The electrically conductive elements can advantageously be in one piece be executed. This enables a continuous, well conductive contact guaranteed even under difficult environmental and manufacturing conditions become.

For example, the one-piece electrically conductive element can be such be issued that at least one leg is larger at an angle Extends 90 ° in the upper layer. This can be advantageous when Introducing the element into the flooring.

It is advantageous if the electrically conductive elements in the electrically conductive upper layer are introduced. It is enough if the electrical conductive elements are brought up to the top layer and this touch, the electrical conductivity is, however, by an intimate Connection between electrically conductive element and electrically conductive Upper class improved.

A further development of the invention provides that several electrically conductive Elements connected to each other in an electrically conductive manner by transverse conductors are. Copper wires, for example, can be used as transverse conductors, which are connected to several electrically conductive elements. this leads to to greatly improve the electrical balance between the electrically conductive elements and a bottom layer arranged underneath.

The transverse conductors are advantageously grounded. This can be done through a good one Connection of the cross conductors to the screed floor or can be achieved with electrically conductive floor elements. Here will for example the connection of the cross conductors with heating pipes or the Grounding cable electrical lines proposed.

The object underlying the invention is also achieved with a Process for producing a floor covering solved in which an electrical conductive top layer with an electrically insulating bottom layer is connected and electrically by the electrically insulating underlayer conductive elements passed through to the electrically conductive top layer become.

The electrically conductive elements serve to derive a electrical potential from the upper layer to the contact area of the Bring about flooring. Here, the electrically conductive top layer by means of an adhesive with the electrically insulating underlayer can be connected, but the layers can also be connected using of the electrically conductive elements. For example at an interlocking of the upper and lower layers by means of electrical conductive elements can be the legs of a U-shaped bracket with the Top layer are connected while the base area between the Brackets are applied to the underside of the lower layer and a connecting surface to the floor below. The connection of the electrical insulating bottom layer by means of the electrically conductive elements with the electrically conductive top layer causes the adhesive layer can be made very thin between the upper and lower layers or can even be omitted. However, the adhesive layer can also be in the form of a strip be executed so that upper and lower layers in the areas between the electrically conductive elements using adhesive are connected. This leads to the advantage that in the field of electrical conductive elements and there is no electrically insulating adhesive the tension compensation in these areas is improved.

When producing a floor covering according to the invention, it is advantageous if transverse conductors are placed on the underside of the lower layer and these Cross conductors are attached with the electrically conductive elements. As Cross conductors can be provided, for example, with wires Brackets to be attached to the bottom of the underlayer. Means However, nails or staples can also be an electrically conductive film or an electrically conductive network attached to the bottom of the underlayer his.

It is advantageous if electrically conductive elements with barbs be used. Barbs on the pin of a nail or in the area of the Legs of brackets make the brackets or nails easy can be inserted into the lower layer and there are sufficient get caught. Due to the length of the electrically conductive elements ensures that this at least to the electrically conductive top layer reach up and preferably penetrate into the upper layer. On Puncturing the top layer should be avoided to prevent the function of the Not to interfere with Flores.

Figur 1

schematisch einen Schnitt durch einen erfindungsgemäßen Bodenbelag und

Figur 2

eine schematische Ansicht einer Ecke eines erfindungsgemäßen Bodenbelages und

Figur 3

eine schematische Darstellung eines erfindungsgemäßen Bodenbelages der im wesentlichen Figur 2 entspricht.

A preferred embodiment of the invention is shown in the drawing and is explained in more detail below. It shows,

Figure 1

schematically shows a section through a floor covering according to the invention and

Figure 2

is a schematic view of a corner of a floor covering according to the invention and

Figure 3

a schematic representation of a floor covering according to the invention which corresponds essentially to Figure 2.

In Figure 1, a carpet tile 1 is shown, which consists of an electrically conductive Upper layer 2 and an electrically insulating lower layer 3. Just an electrically conductive element 4 is shown as an example, the two Legs 5 and 6, which are provided with barbs 7, 8 through which Go through lower layer 3 and get caught in upper layer 2.

The details of the structure are shown in Figure 2. The upper class 2 consists of the carpet pile 9, which on a base coat, which too is to be designated as first back 10, is attached. Below is one Layer 11 made of cashmere adhesive that covers the top layer 2 with the underlying lower layer 3 connects. The lower layer 3 is in the embodiment a felt that serves as an impact sound absorbing material.

The electrically conductive elements 4 are clips with two legs 5 and 6, which are connected to one another via a base 12. These brackets are from below through the lower layer 3 made of felt material inserted through the brain and pressed into the felt layer 3 until the hook the foremost barbs 7 and 8 in the top layer 2.

The lower layer 3 and upper layer 2 are thereby connected to one another. However, this is only secondary as it relates to the invention arrives that the legs 5 and 6 an electrically conductive connection go with the material of the top layer 2. The electrically conductive In the present case, elements 4 are brackets made of copper, one Allow current to flow through the electrically insulating underlayer 3. Further barbs 13, 14, 15, 16 ensure a firm Anchoring the U-shaped bracket in the felt layer 3.

Between the base 12 of the U-shaped bracket 4 and the bottom 17 of the lower layer 3 runs a copper wire 18, which in the present case by several clamps 4, 19 firmly on the underside 17 of the lower layer 3 is held. This copper wire 18 connects a variety of Brackets and thus ensures a potential equalization between the Parentheses. At least one end of the copper wire 18 is on, for example a heating pipe (not shown) grounded so that the entire flooring through the interconnected electrically conductive parts completely is grounded.

In Figure 3 is, for example, a one-piece electrical conductive element 4 shown, which led from the bottom 3 to the top 2 and is designed such that at least one leg 6 'is at an angle extends greater than 90 ° in the upper layer 2. This can be an enlarged electrically conductive contact surface can be guaranteed.

The described design of a floor covering according to the invention is fulfilled the highest demands placed on antistatic carpets can. The flooring is therefore particularly suitable for rooms with electronic Suitable for devices or particularly sensitive people.

Claims (19)

Floor covering (1) with an electrically conductive top layer (2) and an electrically insulating bottom layer (3), characterized in that electrically conductive elements (4) are led through the bottom layer (3). Floor covering (1) according to claim 1, characterized in that the floor covering is fixed to a floor with a conductive adhesive via its lower layer (3). Floor covering according to claim 1 or 2, characterized in that the electrically conductive top layer is a pile (9). Floor covering according to one of the preceding claims, characterized in that the electrically conductive top layer has an electrically conductive base coating (10). Floor covering according to one of the preceding claims, characterized in that an electrically non-conductive adhesive layer (11) is arranged between the top layer (2) and bottom layer (3) and the electrically conductive elements (4) are passed through the adhesive layer (11). Floor covering according to one of the preceding claims, characterized in that the lower layer (3) has a greater thickness than a base coating (10). Floor covering according to one of the preceding claims, characterized in that the lower layer (3) is made of an impact sound-absorbing material. Floor covering according to one of the preceding claims, characterized in that the electrically conductive elements (4) are guided as nails or U-shaped brackets from the lower layer to the upper layer. Floor covering according to one of the preceding claims, characterized in that the electrically conductive elements (4) are passed in one piece continuously through the lower layer (3) to the upper layer (2). Floor covering according to one of the preceding claims, characterized in that the electrically conductive elements (4) have at least one leg (6 ') which extends at an angle greater than 90 ° in the upper layer. Floor covering according to one of the preceding claims, characterized in that the electrically conductive elements (4, 19) are led into the electrically conductive top layer (2). Floor covering according to one of the preceding claims, characterized in that a plurality of electrically conductive elements (4, 19) are connected to one another in an electrically conductive manner by transverse conductors (18). Floor covering according to claim 12 , characterized in that the transverse conductors (18) are grounded. Method for producing a floor covering (1), in which an electrically conductive top layer (2) is connected to an electrically insulating bottom layer (3) , characterized in that the electrically insulating bottom layer (3) leads to electrically conductive elements (4) conductive top layer are passed through. Method according to claim 14, characterized in that the electrically insulating lower layer (3) is connected to the electrically conductive upper layer (2) by means of the electrically conductive elements (4, 19). Method according to one of claims 14 or 15, characterized in that transverse conductors (18) are placed on the underside (17) of the lower layer (3) and the transverse conductors (18) are fastened with the electrically conductive elements (4, 19). Method according to one of claims 14 to 16, characterized in that electrically conductive elements (4, 19) with barbs (7, 13, 14, 8, 15, 16) are used. Method according to one of claims 14 to 17, characterized in that one- piece electrically conductive elements (4) are used. Method according to one of claims 14 to 18, characterized in that the electrically conductive elements (4) have at least one leg (6 ') which extends at an angle greater than 90 ° in the upper layer (2) and when introduced into the Flooring is bent.

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