WO2005012681A1

WO2005012681A1 - Sealing film strip, window frame comprising one such strip, and use of said strip

Info

Publication number: WO2005012681A1
Application number: PCT/EP2004/007766
Authority: WO
Inventors: Werner Welter
Original assignee: Henkel Kommanditgesellschaft Auf Aktien
Priority date: 2003-07-24
Filing date: 2004-07-14
Publication date: 2005-02-10
Also published as: EP1651837A1; DE10333823A1

Abstract

The invention relates to a film strip for the construction industry, that partially enables diffusion and partially blocks diffusion. Said film strip, seen from an axle extending in the longitudinal direction, has a diffusion-enabling film region on one side of the axle and a diffusion-blocking film region on the other side of the axle. The front side of the strip has a coatable layer in the edge region thereof.

Description

Sealing film sheet, window frames with such a sheet and use of this sheet

The invention relates to a film web for the construction sector, which is partially permeable and partially diffusion-blocking, the film web - viewed from an axis running in the longitudinal direction of the web, on one side of the axis a diffusion-open and on the other side of the axis a diffusion-blocking film area has and the north side in the edge region of the film web includes a plasterable layer.

When sealing windows to load-bearing structures, a basic distinction must be made between curtain-type facades, in which the windows are also installed in front of the load-bearing structure by means of appropriate constructions (mainly for larger objects, office buildings, etc.), single or double-skin facades and Thermal insulation composite systems and so-called perforated windows, in which the windows in the area of the load-bearing structure are more or less installed within the opening (predominantly residential buildings, smaller industrial buildings or municipalities).

In order to make the connection of the windows to the structure watertight and airtight and windproof in the case of curtain-type facades, it is state of the art to seal this area with foils. These foils usually consist of EPDM, PLB, EVA or butyl, TPO or PNC, polyethylene, polyester, polyurethane or laminated aluminum foils. The foils are glued to the facade element and on the building structure or mechanically attached.

Another possibility for attachment is to back the films mentioned with a self-adhesive compound, eg. B. on plastic Bitumen base, butyl base or similar, to be provided and thus self-adhesive.

However, all of these foils have the disadvantage that they cannot be pasted over or only with great effort. In addition, they cannot be plastered over with commercially available mortars, such as those described in DIN 18550.

One way of sealing airtight and windproof and then plastering over is by using self-adhesive butyl tapes, which are provided with a fleece on the surface. Such butyl tapes are self-adhesive on the structure and can either be glued into the window structure or mechanically attached. However, this technique has the disadvantage that the butyl tapes generally have a thickness of more than 1 mm and, in the case of adhesive bonds overhead with widths over 150 mm, generally also have to be mechanically fastened or spanned with plaster supports.

An important task of the films mentioned is to ensure the wind and air tightness, and in some cases also the water tightness, of the connections. Depending on the installation situation of the windows and the position of the thermal insulation materials, another property of the foils is important. The question of whether a diffusion-open or diffusion-braking or -blocking film is used has hitherto usually depended on where the film was installed. If the film was installed on the so-called warm side, i.e. at a point where the temperature does not fall below the critical dew point due to the isothermal calculation, water vapor diffusion braking or blocking films were used. If the film was installed on the so-called cold side, i.e. at a point where the temperature is beyond the critical dew point, films that were open to water vapor diffusion had to be used can be used so that the moisture condensing behind the film in winter can diffuse out through the film again in the summer period.

When using water vapor retarding or water vapor barrier foils, the building physics aspects described below are of particular importance. Due to the DL 4108 and the applicable thermal insulation regulations and taking into account the even stricter requirements due to energy saving laws in the future, it is not only necessary to seal and bridge the connection joint between the windows and the supporting structure itself, but also the sealing film in accordance with the building physics large area (for example, 30 to 300 mm, preferably 50 to 150 mm) to the so-called heat-transferring surface, that is to say the load-bearing structure.

This requirement has the following reasons: In winter, the absolute air humidity is generally higher on the room side than on the outside, i.e. H. a higher water vapor pressure occurs on the room side than on the outside. The vapor pressure gradient leads to a water vapor flow from the inside to the outside. Each material presents a certain resistance to the water vapor flow. The property of allowing more or less water vapor to pass through is described by the water vapor diffusion resistance number (μ-value).

In the case of components lying next to each other with different μ values, the building material with the lowest μ value is decisive for the diffusion current. So if only the connection between the window and the supporting structure, if necessary also 1 to 2 cm on the supporting structure, is sealed with a sealant or a film with high water vapor diffusion resistance, but at the same time a porous outer wall brick is used, as is usually the case today the diffusion current will migrate around this seal and is therefore able to penetrate the connection area between the building and the window. There the water vapor can condense to water.

Another problem with the films used to create a seal between the windows and the load-bearing structure was that, as a rule, the problem of moisture accumulation, particularly in buildings with curtain-type facades, could not be completely ruled out by using only one film. It was therefore often necessary in terms of construction to work with two different foils. However, due to the additional effort involved, this procedure leads to a higher expenditure of time in practice and thus often to higher costs.

The solutions to these problems known from the more recent prior art are described, for example, in DE 297 15 660 U1 and WO 01/34922 AI.

DE 297 15 660 U1 describes a tape-like connecting element between a frame component and masonry with an adhesive connection to the frame component and a subsequent flag-like strip element, the connecting element having two adhesive strips formed on the basis of a permanent adhesive, which are connected via a diffusion-open tape section. The problem with the described connecting element is that the film used has an identical permeability to water vapor both inside and outside.

WO 01/34922 relates to a multilayer film web in a diffusion-open to diffusion-blocking design for the construction sector. The film sheet described consists of a water and airtight plastic as a middle layer and plasterable outer layers made of fleece, fabric, technical knitted fabric and the like and an edge-side self-adhesive layer. The publication describes a combined sealing of a window installation, in which a film with different diffusion behavior is used on the inside and the outside. A combination of both foils to form a foil that can be attached in one operation cannot be found in the document.

DE 201 17 273 U1 describes a sealing strip for sealingly bridging a joint between a frame inserted into a soffit of a building and the soffit. The strip described is formed from a multilayer composite web. The publication describes a sealing strip which has a diffusion-open and a water-vapor-tight area, the strip being able to be attached to the frame along the area boundary, for example with the aid of double-sided adhesive tape.

With constructions of the latter type, however, there are disadvantages with regard to the condensation behavior. Especially in the colder seasons, at low temperatures the condensation point of water vapor shifts along the so-called 10 ° C isotherm from the outside of the frame element towards the inside. This is particularly problematic because the air humidity in the interior is often significantly higher in the cold season than outdoors and therefore the air in the interior is potentially loaded with condensable water vapor. This often leads to a situation in which the condensation point lies within the frame element to such an extent that water condenses within the area of the frame element belonging to the interior. This water of condensation can in turn damage the structure.

There was therefore a need for a film web which is particularly suitable for sealing window installations in buildings with curtain walls or perforated windows, in which the seal is directed inwards and outwards Sealing to the outside with regard to the diffusion properties against water vapor are different. There was also a need for such a film web that can be attached in one operation. There was also a need for such a sheet of film, which is essentially self-adhesive to attach to window frames and possibly also to the masonry of the building. There was also a need for such a film web that can be plastered over in the areas adjacent to the masonry. There was also a need for a film web that largely avoided the occurrence of condensation water in an intermediate space between the frame and the reveal.

The present invention was therefore based on the object of providing a film web which meets one or more of the above-mentioned needs. In particular, the object of the present invention was to provide a film web with which an air- and wind-tight connection of a window to a masonry can be achieved directly at the construction site with little effort, the connection area with respect to water vapor towards the inside of the building being considerably larger Diffusion resistance than to the outside. In addition, the object of the present invention was to provide a film web with which an air- and wind-tight connection of a window to masonry can be achieved directly at the construction site without great effort, with condensation of water vapor between the frame and the reveal being avoided as far as possible shall be.

The objects on which the present invention is based are achieved by a film web, as is described in more detail in the context of the text below.

The invention therefore relates to a film web for the construction sector, which is partially open to diffusion and partially designed to block diffusion, wherein the film web, viewed from a longitudinal axis running in the longitudinal direction of the web, has a diffusion-open film area on one side of the axis and a diffusion-blocking film area on the other side of the axis, and wherein the film web divides along the longitudinal axis dividing the film web into a diffusion-open and a diffusion-blocking area the front of the film web is provided with a connecting element for connecting the film web to a frame element, wherein the connecting element can be connected to the frame element in such a way that at least one closure is formed with the rear of the frame element.

In the context of the present text, a “frame element” is understood in principle to mean all types of frames which are embedded in a reveal in a building and are connected to it. Examples of corresponding frame elements are in particular door frames and window frames. The “front of the frame element” is understood to mean that side of the frame element which is directed away from the interior of a building and is directed towards the outside of a building. The “back of the frame element” is understood to mean that side of the frame element which is directed towards the interior of a building and is directed away from the outside of a building.

In the context of the present text, a "film" is understood to mean a thin, flat, flexible, flexible and windable sheet material made of organic materials such as paper, plastic or metal, which can be essentially made in any way, for example by extrusion, rolling, punching, casting, Calendering or spraying. In the context of the present text, the term "film" also includes films which, due to their thickness, are often also referred to as "films". A film web according to the invention has a connecting element, the connecting element being able to be connected to the frame element such that at least one closure is formed with the rear of the frame element. It is provided in the context of the present invention that such a connection does not take place exclusively in the area of the rear of the frame element, but that the connection is interrupted, for example, continuously or once or several times up to approximately the middle of the extent of the cross section of the frame element in the edge area or above out, continues. It is particularly preferred if an end is formed with the front of the frame element and an end with the rear of the frame element. In the context of the present text, a “closure” is understood to mean a connection between the frame element and the film web, which preferably has an essentially driving rain-blocking, water-vapor-blocking and wind-sealing effect. A corresponding termination can be achieved, for example, with the aid of a connecting element which, viewed across the width of the film web, is divided into several sections. However, it is also possible and provided in the context of the present invention and in some cases preferred if the connecting element is present on the film web in such a way that a connection is made with a termination to the front of the frame element and to the rear of the frame element with the aid of a continuous connecting element can. However, it is also preferred according to the invention if a film web has two connecting elements at a distance which allows the film web to be connected to a frame element in such a way that it can be closed off from the front of the frame element and closed off at the rear of the frame element.

Thermoplastic, for example, are used as foils for the design of the diffusion-open and the diffusion-blocking foil region Plastics are used which, as a film, have the properties of being watertight and airtight and, to a certain, controllable extent, impermeable to water vapor (barrier to diffusion) or permeable to diffusion.

The water vapor diffusion through a film is characterized by the sd value, which depends on the film polymers used. Polyolefins, for example LDPE, EPDM, butyl, TPO or PVC, are preferably used for the diffusion-blocking area (sd value> 15 m to about 100 m), while especially polyamides are used for the diffusion-open area (sd value 15 m or less), Polyester or thermoplastic polyurethanes are suitable. The sd value indicates the thickness of an air layer that has the same resistance to water vapor diffusion as the material.

A film web according to the invention, as viewed from an axis running in the longitudinal direction of the web, has a film region that is open to diffusion on one side of the axis and a diffusion-braking or diffusion-blocking film region on the other side of the axis. It is possible within the scope of the present invention that the two different film types, which form the film areas with diffusion-blocking and diffusion-open properties, abut or even overlap along the axis running in the longitudinal direction of the web.

However, it is also provided according to the invention that the two different types of film do not overlap or abut one another along the axis running in the longitudinal direction of the web, but are arranged at a distance from one another. Such a distance can be produced, for example, in that the two film areas having different properties are applied to a carrier layer, which on the one hand connects the two different film areas, on the other hand, also ensures a distance between the two film areas. A corresponding backing layer can be ensured, for example, by means of a tape element which is self-adhesive on one or both sides and on which the two film areas with different properties are bonded at a corresponding distance from one another.

However, it is preferred in the context of the present invention if the two film regions are only a short distance from one another or no distance from one another or even overlap along the longitudinal axis of the film web according to the invention.

A film web according to the invention can have a film layer or two or more film layers in cross section, for example three, four or five film layers. The number of film layers can be different for the diffusion-blocking film area and the diffusion-open film area.

In a further embodiment of the present invention, for example, a metal foil, in particular an aluminum foil, can additionally be laminated onto the diffusion-blocking foil region. This almost completely prevents water vapor diffusion through the product and increases the sd value to significantly more than 100 m depending on the thickness of the aluminum foil. It is also possible for the diffusion-blocking film area to have an additional metal film, in particular an aluminum film as an intermediate layer between two or more film layers, but in particular between two film layers.

The weight per unit area of the films used for the film areas with different properties can be from about 20 g / m ² to about 1000 g / m ² according to the requirement profile and is preferably from about 80 g / m ² to about 130 g / m ² . In a preferred embodiment, an LDPE film with a basis weight of about 130 g / m ^{2 is} used as the diffusion-blocking film area.

In the context of the present invention, the film areas with different properties can, for example, only make up part of the area of the film, which is responsible for the self-supporting properties of the film, based on the film width. For example, a film web according to the invention, starting from the above-mentioned longitudinal axis in the direction of the film edge, may first have a film web with properties that are open to diffusion and then another material with self-supporting properties that extends, for example, to the film edge. However, starting from the longitudinal axis of the film web, the respective film region preferably extends to the film edge with properties that are open to diffusion or that prevent diffusion.

The longitudinal axis along which the film web is divided into film areas with different properties can be arranged essentially at any distance from the edges of the film web. However, it has proven useful if the longitudinal axis is arranged in a region of the film web which is arranged at a distance of approximately 30% from the central axis to the right or to the left, based on the entire width of the film web.

In the context of a preferred embodiment of the present invention, the longitudinal axis is arranged in a region of the film web which is at a distance of less than 20% from the central axis, based on the entire width of the film web, preferably less than 15 or less than 10%. located. The term "longitudinal axis" refers to an imaginary straight line along the longitudinal direction of the film strip according to the invention. However, the longitudinal axis itself, as a spatial-physical configuration on the film strip, can deviate from the ideal of the straight line and, for example, can be meandering, jagged or otherwise deviated from the straight line. In the context of a preferred embodiment of the present invention, however, the spatial-physical configuration of the longitudinal axis of a film strip according to the invention is present as an essentially straight line, preferably essentially parallel to the edges of the film strip.

The film webs according to the invention have an area on the front or on the back or on the front and the back with a coating which ensures that the film can be plastered over in this area. A suitable coating can extend, for example, over the entire front or the entire back or over the entire front and back of the film web according to the invention. However, a suitable coating can only cover an edge region of the film web. A plasterable coating can, for example, only be located on one edge of the film web, for example on the edge of the film web that lies on the side with the diffusion-blocking film region. However, it is also possible, and preferred within the scope of the present invention, if at least both edge areas of the film web, i.e. both the edge area on the side with the diffusion-blocking film area and the edge area on the side with the diffusion-open film area, are corresponding Have coating, wherein such a coating can affect both the front and the back or front and back.

In the context of the present invention, fleeces, fabrics, technical knitted fabrics and ropes made of synthetic and natural fibers and glass, as well as reinforced paper and foils, can be used as a plasterable coating are provided that they can form an adhesive bond to the film, for example using an adhesive, and meet the product requirements with regard to plasterability. The surface weights of the plasterable coatings can be from about 20 g / m ² to about 1000 g / m ² , for example from about 80 g / m to about 100 g / m. In a preferred embodiment of the invention, polyester needle-punched nonwovens with a weight per unit area of approximately 80 g / m ² are used as the plasterable coating.

In the context of the present text, the term “edge area” relates to an area of the film according to the invention that extends from the film edge in the direction of the film center. The plasterable coating preferably takes up approximately 1 to approximately 99.9% of the area between the film edge and the longitudinal axis, for example approximately 5 to approximately 90 and or approximately 10 to approximately 80% of the area between the film edge and the longitudinal axis of the film strip according to the invention.

It is possible that the surface covered by the plasterable coating is essentially identical on both sides of the longitudinal axis. However, it is also provided that the surface covered by the plasterable coating is different on both sides of the longitudinal axis, that is to say on film areas with different properties with regard to their resistance to the diffusion of water vapor through the film. For example, when using the film webs according to the invention for sealing window installations on buildings with curtain walls, it often makes sense to design the film area extending in the direction of the curtain wall with regard to its dimensions and, for example, also with regard to a coating with plasterable material than the film area that extends in the direction of the load-bearing masonry and in the direction of the interior of the building.

In order to create a simple fastening possibility for the film web according to the invention, for example on a window profile, one is In the context of a preferred embodiment of the present invention, the film web according to the invention is provided on the front side with a connecting element along the longitudinal axis dividing the film web into a diffusion-permeable and a diffusion-blocking area, which connection element enables simple fastening of the film, for example, to a window profile. Basically, all connecting elements are suitable that allow a strong connection between the window profile and the film. For example, adhesive elements or mechanical connecting elements are suitable. The adhesive elements or the mechanical connecting elements are designed in such a way that they enable a connection at least with a termination of the film web to the rear of a frame element. In the context of a further preferred embodiment of the present invention, a film web according to the invention has a connecting element which enables both a termination of the film web with the rear of a frame element and a connection with a termination of the film web with the front of a frame element.

In the context of a further embodiment of the present invention, a film web according to the invention is therefore provided on its front side with an adhesive surface A which is adhesive on both sides. In principle, any adhesive tape which is adhesive on both sides and which is preferably applied on the longitudinal axis separating the two different film areas on the front of the film is suitable as the adhesive surface. In principle, all pressure-sensitive adhesive tapes are suitable as double-sided adhesive tapes, for example those with or without fabric reinforcement. A fabric-reinforced adhesive tape is preferably used as adhesive surface A in the context of the present invention.

However, it is also possible according to the invention to apply a hot melt adhesive or a hot melt pressure sensitive adhesive as the adhesive surface A. Doing so At the same time, a release paper was run in to protect the adhesive until processing. Tissue reinforcement can also be introduced.

The adhesive surface A can, for example, only be used in the context of the film according to the invention to establish a connection between the film and the window profile. However, it is also possible for the adhesive surface A to have a functional task within the film according to the invention, in particular a function with regard to the cohesion of the different film regions along the longitudinal axis described above.

If a film web according to the invention has an adhesive surface A as a connecting element in the context of the present invention, the width of such an adhesive surface is selected at least such that the adhesive surface A as a connecting element makes it possible to connect the film web according to the invention to the frame element such that at least one termination the film with the back of the frame element is present. In the context of a preferred embodiment of the present invention, the adhesive surface A therefore has a width of at least approximately 20 to at least approximately 300 mm, in particular of at least approximately 25 to at least approximately 200 mm or at least approximately 30 to at least approximately 150 mm or at least approximately 35 to at least about 80 mm. In this context it is possible, for example, to produce corresponding film webs according to the invention with adhesive areas A of different widths, the film webs being provided with an indication on the packaging for which frame depth they are suitable.

In the context of a further embodiment of the present invention, the adhesive surface A also fulfills its function for fastening to be suitable for the film on a window profile, the purpose of at least partially ensuring that the different film areas of the film web according to the invention are held together along the longitudinal axis.

In the context of a further embodiment of the present invention, a film web according to the invention along the adhesive surface A can be equipped in whole or in part with mechanical fastening elements, for example with so-called piping, which can be clamped into the window profile. The piping can, for example, be fastened to the adhesive surface or be mechanically connected, for example by clamping, to the film web according to the invention.

A film web according to the invention accordingly has at least one connecting element on its front side and a plasterable coating on the front or on the back or on the front and the back, the plasterable coating covering the entire surface or the front or the back or the front and the back covered in one edge area or in both edge areas.

The back of a film strip according to the invention can furthermore be designed functionally to further simplify the application of the film web according to the invention.

For example, it is possible to provide the back of the film web according to the invention with an adhesive layer in one edge region or in both edge regions. In principle, all adhesives with which the back of a film web according to the invention can be coated and which are suitable for connecting the film web to a corresponding substrate are suitable for this purpose. Suitable are, for example, adhesives which can be applied in a layer thickness which is at least about 0.01 mm, but preferably above, for example at least about 0.2, 0.3, 0.4 or at least about 1.0 mm or more, for example at least about 2, 3, 4 or 5 mm.

As a further functional element, a film tape according to the invention can also have an expandable foam sealing tape on the back or two or more expandable foam sealing tapes. Foam sealing tapes are particularly suitable, which in the compressed state take up less than 50%, preferably less than 30%, of their volume in the expanded state.

The expandable foam sealing tape or the two or more expanding foam sealing tapes can in principle be attached at any point on the back of the film tape according to the invention, but in particular at those places where a seal between the film tape and the structure is to take place. Only an expanding foam sealing tape can be used in the context of the present invention. However, it is also possible that two or more expanding foam sealing tapes, for example two, three, four, five, six, sieve or eight or more expanding foam sealing tapes, are used. In this case, the expanding foam sealing tapes should run essentially parallel to one another and preferably essentially parallel to the longitudinal axis of the film web.

In the context of a preferred embodiment of the present invention, the back of the film tape according to the invention is provided with an expandable foam sealing tape at the point or places, which is opposite a point at which the front side of the film tape is to be connected to a window profile, preferably accordingly, for example on the back along the longitudinal axis of the film strip described above or at least parallel to this longitudinal axis. This arrangement has the advantage that the area between the window profile and the structure is further sealed and mechanically stabilized.

In the context of a further preferred embodiment of the present invention, the back of the film tape according to the invention is provided, for example, at the location or locations with an expandable foam sealing tape which closes or terminates with the outwardly directed end of a window profile. In this case it is possible, for example, that the film ends together with the foam sealing tape on the outward side. In the context of a further preferred embodiment of the present invention, the back of the film tape according to the invention is provided, for example, with an expandable foam sealing tape or two or more expanding foam sealing tapes at the location, which ends with the inwardly directed end of a window profile. In this case it is possible, for example, that the film ends together with the foam sealing tape or the foam sealing tapes on the inward side. In the context of a further preferred embodiment of the present invention, the back of the film tape according to the invention is provided, for example, with an expandable foam sealing tape at the point at which it closes both with the inward and outward end of a window profile or other frame element. It is also provided according to the invention that a corresponding foam sealing tape is attached to the film tape according to the invention in such a way that the connecting element of the film tape enables a closure with the inner edge or the outer edge or with the inner and outer edge of a frame element, but the foam sealing tape only for a seal of a partial area between the frame element and the structure, preferably for a seal between a around the center of the Area of the frame cross-section of the frame element and the structure, ensures.

Suitable expandable foam sealing tapes are known. Basically, all such foam sealing tapes fulfill the function desired according to the invention. As a rule, such foam sealing tapes consist of an open-cell foam material which, when compressed and relieved, returns to its original form which existed before compression. Such foam materials are usually impregnated with compounds that greatly delay the recovery after compression and thus allow an appropriate processing time.

Particularly suitable in the context of the present invention are, for example, the products sold by Henkel under the name Sista or the products from ISO-Chemie sold under the name blocoband ® or SLP-bloco ®.

Suitable foam tapes can in principle have a width which is in a range from about 0.1 to about 50% of the total width of the film tape according to the invention. However, it has turned out to be advantageous if the width of the expandable foam strip approximately corresponds to the width of the connecting element, it being possible for the variation range to be approximately 30%.

It has been found that a suitable expandable foam tape is in many cases able to replace the step of foaming the space between the frame element and the reveal, which is usually necessary after fitting a frame element into the reveal, and thus the entire method of fitting to simplify a frame element and make it more secure. In a preferred embodiment of the present invention, a suitable foam sealing tape has, for example, a width of approximately 2 to approximately 50 cm, for example approximately 2.5 to approximately 40 cm or approximately 3 to approximately 30 cm, in particular approximately 2 to approximately 10 cm or approximately 4 up to about 8 cm.

A suitable foam sealing tape can also have an adhesive layer on the side facing away from the film. However, it is also possible that the foam sealing tape has no adhesive layer on the side facing away from the film.

The adhesive layers described in the context of the present invention in connection with a film web according to the invention preferably have a cover on their side facing away from the film. Suitable materials for such a cover are known to the person skilled in the art. For example, release papers or release films are suitable, generally with a silicone coating.

The film webs according to the invention can essentially be produced in any manner known to the person skilled in the art. So it is complex, but possible, in a first step of a corresponding manufacturing process, to connect an extruded film with diffusion-blocking properties and an extruded film with diffusion-permitting properties by suitable measures while still overlapping along its longitudinal axis at the edges in the plastic state. It is also possible to thermally overlap two foils with corresponding properties, provided the materials allow this. Another possibility for connecting two foils with corresponding properties is, for example, overlapping gluing with a suitable adhesive. In addition, it is possible to connect two films with corresponding properties to one another along the film edges using a suitable adhesive surface, for example using a double-sided adhesive tape. The connection can be carried out, for example, in such a way that the two foils are connected to one another essentially at the edge. However, it is also possible to leave a distance between the film edges of the films to be connected.

It is also possible to connect two films with corresponding properties to one another along the film edges using a hot melt adhesive. The connection can be made, for example, in such a way that the two foils are connected to one another essentially at the edge. However, it is also possible to leave a distance between the film edges of the films to be connected. The connection between the two film areas can be reinforced, for example, by using a fabric tape in the adhesive surface.

The functional equipment of the film areas, in particular the equipment with plasterable coatings, can take place before or after the diffusion-permeable and the diffusion-blocking film parts have been joined together. For example, it is possible first to produce the respective diffusion-open and diffusion-blocking film parts, to assemble them into the film web according to the invention and then to provide them with a plasterable coating. However, it is also possible and preferred in the context of the present invention that the individual film parts already provided with a plasterable coating are first produced and these are then joined together to form the film web according to the invention.

The present invention therefore relates to a method for producing a film web according to the invention, in which a diffusion-open and a diffusion-blocking film, that on the front or on the back or have a plasterable area on the front and the back along a longitudinal axis and are equipped with a connecting element, so that the connecting element can be connected to the frame element in such a way that at least one closure is formed with the back of the frame element.

In practice, it has proven useful, for example, to produce a film web according to the invention by producing a film with the desired properties which are open to diffusion or which prevent diffusion by extrusion. Above and below the extrusion gap, the plasterable materials mentioned above, for example nonwovens, are fed to the still soft, extruded film, which are pressed with the extruded film by means of rollers so that the materials adhere to the still soft film and then when the film cools Stay connected to the film. The film takes on the task of an adhesive that ensures the cohesion between the film and the material, for example nonwoven.

This manufacturing principle shows that a "film" in the sense of the invention does not necessarily have to be a structure with an essentially smooth surface. Due to the manufacturing process described here, a film in the sense of the invention can also have a correspondingly rough surface. What is decisive is the basic principle that relates to the degree of permeability or the blocking of the film for water vapor and water in the individual areas of a film web according to the invention.

A corresponding effect can therefore not only be achieved by the method described above. In principle, any production method in the context of the present invention in which a film with corresponding properties is suitable in any way, for example by gluing or by the extrusion process described above with subsequent calendering can be provided with a plasterable coating.

The film strip according to the invention can be mechanically, e.g. B. by clamping, a piping connection or by means of a self-adhesive strip, which, as described above, can already be applied to the front of the film web, or glued by using an adhesive. On the other hand, the film web can be glued with an adhesive, which can be supplied in standard cartridges or film bags. This has the advantage that by applying an appropriate amount of the adhesive, the unevenness of the surface of the building structure that is customary on the construction site can be compensated for efficiently and safely. After the adhesive has dried, the film web can be plastered over with all plastering that is customary in construction. It can be painted over or, which is important for thermal insulation composite systems, covered with insulation materials using all commercially available adhesives.

If a film web according to the invention is equipped with one or more adhesive layers in the edge region on the back, then it is also possible to dispense with a further adhesive when the film web according to the invention is attached to the structure.

Due to the small thickness of the materials used, the film web according to the invention can also be quickly and correctly fitted into corners. The sum of the properties of the film in connection with the rational processing guarantees both the watertightness and the airtightness and windproofness under conditions customary on construction sites, whereby the film sheet according to the invention, depending on the equipment and corresponding film width, slows down or almost completely prevents water vapor diffusion to the building it is open to water vapor diffusion on the so-called cold side. It has proven to be advantageous that the thickness of a film web according to the invention at its thinnest point is approximately 0.1 to approximately 5 mm, in particular approximately 0.2 to approximately 3 mm or approximately 0.3 to approximately 2 mm or approximately 0.4 to is about 0.7 mm.

Overall, a film web according to the invention preferably has at least one or more of the following features: the width of the film web is 5 to 80 cm, the thickness of the film web at its thinnest point is 0.1 to 1 mm, in particular 0.4 to 0.7 mm The thickness of the film web and the type of adhesive of the adhesive surface A, provided there is an adhesive surface A, and the width of the adhesive surface A are coordinated with one another in such a way that the film web can be permanently attached to window profiles solely by gluing and without mechanical fastening - the width of the film web and the width of the adhesive area A is coordinated with one another such that the ratio of the total width of the film web to the width of the adhesive area is at most about 50: 1, for example about 30: 1 or about 10: 1.

It has proven to be advantageous in many cases if the ratio of the total width of the film web to the width of the adhesive surface is within a range from approximately 9: 1 to approximately 1: 1, for example approximately 8: 1 to approximately 2: 1 or approximately 7 : 1 to about 3: 1 or about 6: 1 to about 3.5: 1 or about 5: 1 to about 4: 1.

The film webs according to the invention can be rolled up or, for example, folded, in particular in zigzag form, made available to the user. However, it is also possible and within the scope of the present Invention provided that windows or window profiles are already equipped with a film web according to the invention.

The present invention therefore also relates to a window frame with a diffusion-blocking and diffusion-open film web connected to the window frame via a connecting element according to the present invention, the connecting element being able to be connected to the frame element in such a way that at least one closure is formed with the rear of the frame element. The connection is preferably carried out in such a way that such a connection does not exist exclusively in the area of the rear of the frame element, but rather that the connection continues, for example, continuously or once or several times until the middle of the extent of the cross section of the frame element in the edge area. It is particularly preferred if an end is formed with the front of the frame element and an end with the rear of the frame element.

Window frames can already be equipped with the film sheet at the factory, so that they only have to be used on the construction site and the film sheet has to be glued on and plastered.

The film web according to the invention can be used particularly advantageously for sealing the connections of window frames to load-bearing structures in perforated windows or curtain walls, as well as in single- or multi-layered facades and facades to be coated with thermal insulation composite systems.

The present invention therefore also relates to a method for sealing a frame element against a building, in which a film web according to the invention is connected to a frame element in such a way that at least one closure is formed with the rear of the frame element. The connection is preferably carried out in such a way that such a connection is not exclusively in the area of the rear of the Frame element exists, but that the connection continues for example continuously or one or more times interrupted up to about the middle of the extent of the cross section of the frame element in the edge region. It is particularly preferred if an end is formed with the front of the frame element and an end with the rear of the frame element.

Exemplary embodiments of the invention are described in more detail below, partly with reference to drawings. It shows

1 shows a section through an outer wall part in the area of a window in the case of a facade equipped with a thermal insulation composite system with the use of a film web according to the prior art in a water vapor diffusion barrier design on the inside of the window,

2 shows a section through an outer wall part made of heat-insulating building material, in the area of the window with the use of a film web according to the prior art in a diffusion-open design on the outside of the window,

3 shows a section through an outer wall part, in the area of the window with the use of a film web according to the prior art, which has a film area blocking water vapor diffusion on the inside and a film area open to water vapor diffusion on the outside, the penetration of moisture (for example driving rain) into the space between the film web and frame element is shown within the reveal,

Figure 4 shows a section through an outer wall part, in the area of the window with the use of a film web according to the prior art, the one on the inside water vapor diffusion blocking film area, has a water vapor diffusion open film area on the outside, the penetration of water vapor and its condensation in the space between the film web and frame element within the reveal being shown at the 10 ° C isothermal bath,

5 shows a section through an outer wall part, in the region of the window with the use of the film web according to the invention, which has a film area on the inside that blocks water vapor diffusion, and on the outside a film area that is open to water vapor diffusion,

FIG. 6 shows a section through an outer wall part, in the area of the window with the use of the film web according to the invention, which has a film area that blocks water vapor diffusion on the inside and a film area that is open to water vapor diffusion on the outside, the barrier against the penetration of water vapor on the room side and the ingress of driving rain on the outside and the course of the 10 ° C isotherms are shown,

FIG. 7 shows a section through an outer wall part, in the area of the window with the use of the film web according to the invention, which has a film area that blocks water vapor diffusion on the inside and a film area that is open to water vapor diffusion on the outside, the heat and sound-insulating filling of the area between the reveal and frame element being shown by an expanded foam element will and

Figure 8 shows a section through a film web according to the invention with an expanding foam element in the delivery state. In all drawings, the same reference symbols have the same meaning and are therefore only explained once, if appropriate.

Explanation of use using the drawings

In FIG. 1, a windproof window connection is shown on the inside using a sheet of steam blocking material known from the prior art. A window frame 1 is connected to the facade 2 in a conventional manner. The air- and windproof water vapor diffusion-braking connection of the window frame 1 to the load-bearing masonry 3 is shown. For this purpose, a vapor barrier film 4 is glued to the profile of the window frame 1. For this purpose, the film web 4 has an approximately 2 cm wide self-adhesive strip on one edge. The other edge of the film web 4 is glued to the supporting masonry 3, which can of course also be a concrete wall, by means of an adhesive paste 5. The interior plaster 6 can then be applied in the usual thickness to this part of the film web 4 glued to the masonry 3.

FIG. 2 shows a windproof window connection on the outside using a film web known from the prior art in a diffusion-open design. A window frame 1 is connected in a conventional manner to the heat-insulating, load-bearing masonry 3. The air and windproof, watertight but water vapor diffusion-open connection of the window frame 1 to the load-bearing masonry 3 is shown. For this purpose, the film 4 is glued to the profile of the window frame 1. For this purpose, the film web 4 has an approximately 2 cm wide self-adhesive strip on one edge. The other edge of the film web 4 is glued to the supporting masonry 3 by means of an adhesive paste 5 or an adhesive layer 7. The outer plaster 8 can then be applied in a conventional manner to this part of the film web 4 glued to the masonry 3. FIG. 3 shows a combined seal on the inside and outside with a film web that inhibits water vapor diffusion and is open to water vapor diffusion. A window frame 1 is connected in a conventional manner to the load-bearing masonry 3. The film web with areas 4a and 4b is now attached to the window profile 1 in such a way that the water vapor diffusion-blocking area 4a of the film web according to the invention is on the side facing the building interior, the water vapor diffusion area 4b of the film web according to the invention is on the outside of the window profile 1. The film is attached to the masonry in the edge areas of the film areas 4a and 4b by means of an adhesive paste 5 or an adhesive layer 7. Adhesion to the window profile 1 is achieved by means of a double-sided adhesive tape 10 with fabric reinforcement. On the inside, an interior plaster 6 of the usual thickness can then be applied to the region 4a of the film web which is coated and can be coated with water vapor diffusion. The figure illustrates the penetration of driving rain 11 into the area between the film 4b and the frame 1 due to the inevitable lack of closure between masonry / plaster and frame or film and frame due to different movements of the frame material and the masonry.

Figure 4 also shows a combined seal on the inside and outside with a water vapor diffusion braking and water vapor diffusion open film web. A window frame 1 is connected in a conventional manner to the load-bearing masonry 3. The film web with areas 4a and 4b is now attached to the window profile 1 such that the water vapor diffusion-blocking area 4a of the film web according to the invention is on the side facing the building interior, the water vapor diffusion open area 4b of the film web according to the invention is on the outside of the window profile 1. The The film is attached to the masonry in the edge areas of the film areas 4a and 4b by means of an adhesive paste 5 or an adhesive layer 7. Adhesion to the window profile 1 is achieved by means of a double-sided adhesive tape 10 with fabric reinforcement. Figure 4 further illustrates the course of the 10 ° C isotherms 14 as a condensation limit for water vapor. It is shown how water vapor 12 penetrates from an interior into the area between film 4a and window frame 1 and condenses in this area due to the course of the 10 ° C. isotherms. The water condensed there can lead to structural damage.

FIG. 5 shows a film web according to the invention for a combined seal on the inside and outside of a frame element with a water vapor diffusion retarding and water vapor diffusion open film web. A window frame 1 is connected in a conventional manner to the load-bearing masonry 3. Instead of the adhesive tape known from the prior art, which only allowed a connection between a small area of the window frame with the film web according to the prior art, a film web according to the invention has a wide self-adhesive area, preferably in the form of the double-sided adhesive tape 10 shown, the width of which is dimensioned so that when glued to the window frame it can close with its front and back or is slightly wider. Adhesion to the window profile 1 is achieved by means of a double-sided adhesive tape 10 with fabric reinforcement. In contrast to the connecting elements according to the prior art, the adhesive tape 10 here has a width which is sufficient to produce a seal between the film web and the front and rear of the window frame.

FIG. 6 shows a film web according to FIG. 5, but the typical course of a 10 ° C. isotherm 14, driving rain 11 and water vapor 12 are shown. As can be seen immediately from FIG. 6, can occur in the cavities No more moisture should accumulate between the film and the window frame due to the inventive design of the film web.

FIG. 7 shows a film web according to the invention, the back of which was equipped with an expandable foam tape. As can be clearly seen in FIG. 7, the expanded foam tape filled the cavity between the reveal and the frame element, thus ensuring mechanical stabilization of the frame element and further reducing the possibility of moisture penetrating into this area. In addition, the expanding foam tape ensures the thermal and acoustic insulation of the connection of a frame element to the load-bearing structure and eliminates the need to fill the space later with construction foam or other acoustic or thermal insulation materials.

Figure 8 shows a film web according to the invention with expanding foam tape in the delivery state.

LIST OF REFERENCE NUMBERS

1 window frame, window profile

2 facade

3 load-bearing masonry

4 foil web

4a film area, water vapor diffusion barrier

4b film area, open to water vapor diffusion

5 adhesive paste

6 interior plaster

7. Adhesive layer

8 exterior plaster

9a expanded foam tape

9b expandable foam tape

10 double-sided adhesive tapes

11 driving rain

12 water vapor

13 steam condensate

14 Course of the 10 ° C isotherms

15 release paper

16 Cover film for expandable foam tape

Claims

claims

1.Film web for the construction area, which is partially open to diffusion and partially designed to block diffusion, the film web, viewed from a longitudinal axis running in the longitudinal direction of the web, having a diffusion-open film area on one side of the axis and a diffusion-blocking film area on the other side of the axis, and wherein the film web is provided with a connecting element for connecting the film web to a frame element along the longitudinal axis on the front side of the film web that divides a diffusion-open and a diffusion-blocking area, the connecting element being able to be connected to the frame element in such a way that at least one closure with the Back of the frame element is formed.

2. Film web according to claim 1, characterized in that the front or back or front and back comprises a plasterable area.

3. Film web according to claim 1 or 2, characterized in that the longitudinal axis dividing the film web into an open to diffusion and a diffusion-blocking area is arranged in a region lying by 30% or less around the central longitudinal axis of the film web.

4. Film web according to one of claims 1 to 3, characterized in that it has at least one double-sided adhesive surface B or another connecting element in at least one edge area on the back of the film web.

5. Film web according to one of claims 1 to 4, characterized in that it has one or more of the following features: a. the width of the film web is 5 to 80 cm b. The thickness of the film web at its thinnest point is 0.1 to 1 mm, in particular 0.4 to 0.7 mm.

6. Film web according to one of claims 1 to 5, characterized in that it has an adhesive surface A or a piping or both as a connecting element.

7. The film web according to claim 6, characterized in that the adhesive surface A has a width that allows a conclusion of the film web on the front and on the back of a frame element.

8. Film web according to one of claims 1 to 7, characterized in that it is provided on the back with an expandable foam tape.

9. window frame with a diffusion-blocking and diffusion-open film web connected via a connecting element to the window frame according to one of claims 1 to 8, wherein the connecting element can be connected to the frame element such that at least one end is formed with the back of the frame element.

10. A method for producing a film web according to one of claims 1 to 8, in which a diffusion-open and a diffusion-blocking film, which can be plastered on the front or on the back or on the front and the back Area have to be connected along a longitudinal axis and equipped with a connecting element, so that the connecting element can be connected to the frame element such that at least one termination is formed with the rear of the frame element.

11. A method for sealing a frame element against a building, in which a film web according to one of claims 1 to 8 is connected to a frame element such that at least one closure is formed with the rear of the frame element.

12. Use of a film web according to one of claims 1 to 8 for sealing the connections of window frames to load-bearing structures in perforated windows or curtain walls and in single or multi-layered facades and facades to be coated with thermal insulation composite systems.