EP2297411B1 - Foam sealing strip - Google Patents

Description

The invention relates to a suitable for sealing a window frame against a window reveal foam sealing strip, which is impregnated for delayed recovery, the foam sealing strip has two opposite, respectively in the installed state of the inner or the outer side of the window frame facing narrow sides and to rest against the Window side or soffit suitable broadsides, further at least one formed as a height range edge portion of the cross section in the fully recovered state starting from a broadside given base surface has a greater height than a subsequent widthwise low range, the height range and the low range in alignment with a longitudinal direction run the foam sealing strip and in the fully recovered state on the surface opposite the base surface is given a curved cross-sectional shape of the surface.

Such foam sealing strips have already become known in various embodiments. In particular, on the EP 1 811 111 A2 to refer. In addition, about on the EP 1 131 525 B1 , In the case of the foam sealing strip known from the first-mentioned document, a strip element or foam strip is assigned, which deforms a base surface of the foam sealing strip, the base area assigned to a self-adhesive layer, such that a narrow side is associated with an increase in the foam material. Sealing strip results, so in the installed state, a higher compression.

From the EP 2 112 292 A2 is a sealing element, in particular a joint sealing strip, especially a pre-compressed or uncompressed joint sealing strip with or without pressure-sensitive adhesive, for the sealing of an edge region of a component against an adjacent connection region of a building, vehicle or the like. The EP 2 112 292 is state of the art under Article 54 (3) EPC and therefore not relevant to issues of inventive step.

The EP 0 976 882 A2 discloses a sealing body of soft, preferably open-cell and impregnated foam, which is particularly characterized in that the sealing body is profiled on one or on opposite surfaces.

Based on the cited prior art, the invention has the object of specifying a foam sealing strip, which can advantageously achieve a different compression of the sealing strip across the width in the installed state, but avoids the risk of condensation within the foam sealing strip.

A solution to this problem is given according to the concept of the invention in the subject matter of claim 1. Accordingly, it is provided that the base surface is a flat, extending over the entire width and by the integral with respect to the foam cross-section itself formed base surface. The fact that the so one-piece cross-section prepared starting from a flat base surface, but nevertheless curved on the upper side in cross section, an advantageous ease of manufacture is given. It is also provided that the curvature line in cross section has a turning point. In addition, the curved course of the surface can be achieved that in the installed state, however, a complete system is nevertheless given. The width results in a continuous transition with regard to the different compression.

The designations of the outer surfaces of the foam sealing strip as broadsides or narrow sides are chosen with regard to the usual given geometry in the installed state. The broad side is (in a cross-sectional view) the dimension extending in the joint depth (for example perpendicular to the plane of a window frame) and the narrow side is the dimension extending in the joint width (in the plane of the window frame in the example). Basically, a narrow side but also have a larger dimension than a broadside.

Further features of the invention are described below, also in the description of the figures, often in their preferred assignment to the already discussed above claim concept, but they can also be assigned to only one or more individual features of this claim or independently or in a different overall concept of Meaning.

According to the invention, it is provided that the low region has one tenth or more of the dimension of a broad side, that is to say the width dimension of the sealing strip. In particular, it is preferred that the low region has up to nine tenths of the dimension of a broadside. Regarding the mentioned range of the dimension of the low range, ie from one tenth to nine tenths, all intermediate values are also included here in the disclosure, in particular in 1/10 steps of the width dimension.

The formation of the foam sealing strip in cross section may be asymmetrical. In other words, as generally described above, one - and according to the invention, only one - height area, namely at the edge, is provided. This design is particularly suitable with regard to a use to achieve a higher vapor-tightness on one side, just usually the inside in the installed state, as is known from the aforementioned EP 1 811 111 A2 is known.

Based on a completely reset state, the invention provides that a height of the low region corresponds to 60% to 80%, preferably 60% to 70% of the height of the height range. Here, the height is the dimension measured in the narrow side direction or expansion direction from the base or a self-adhesive strip. With regard to the areas mentioned, any intermediate values, in particular in 1/10% increments from the lower and / or upper limit to the respective other limit, are also included to a limited extent.

The transition, seen in cross-section, from a height range to a low range is curved.

With regard to a curved course of the surface, it is provided according to the invention that the curvature line has a point of inflection in cross-section.

As far as two foam sealing strips are arranged one above the other, in particular their Bonding preferred.

It is also preferred that the height region or the raised second foam-sealing strip is aligned with a side surface of the first foam-sealing strip.

Insofar as bonding is provided, it is further preferred in particular for a thread grid to be arranged in the bonding area between the first foam sealing strip and the second foam sealing strip.

It is also particularly preferred that the height range, in particular a height range leading to a height range which leads to different vapor tightness with regard to the side regions, be set differently in color than the low region. This is particularly favorable also feasible in the case of two foam-like sealing strips arranged one above the other like a layer. This color setting can serve, for example, to be used as an installation aid, since in this respect is to ensure a correct installation. The higher tightness must be provided on the inside of the room.

A height range may be in the fully recovered state having a height, measured from a base surface, which corresponds to half to 1.5 times a width extension of the sealing strip (total). This bandwidth also includes all intermediate values, if not already indicated by way of example, as disclosed, in particular in 1/10 steps from the lower and / or upper limit to the respective other limit or restricted in the sense of singular values.

In the case of a design with two height regions located next to one another in the width direction, the fully recovered height of the foam sealing strip in the height range preferably corresponds to 0.25 to 0.75 of the width of the sealing strip. Also in this regard, the disclosure includes, as detailed above, all intermediate values.

It is also possible that the foam sealing strip in the packaging state has a similar compression across its width. The fact that a similar compression in the packaging state, there is also a similar provision in the course of installation in the on-site joint. The foam sealing strip "grows" in the Course of provision over its entire page to the same extent. It is practically impossible to observe that the altitude range would reset itself more quickly. In addition, an advantageous one-piece design of the foam sealing strip can also be made due to this measure. Said similar compression, ie, that despite different height extent of the foam strip across the width in fully restored state, the degree of compression in the packaging state across the width is the same, can basically be achieved for example by a suitably adapted packaging corresponding to the foam strip over the width his - similar - compressed contour follows. For example, formed by an insert made of hard material such as hard plastic. In principle also possible packaging variant "stick", ie in the form of an elongated strip-shaped part, the package itself may be provided in this contour, such as the cover is designed as a corresponding hard material cover with one of the correspondingly structured surface of the foam sealing strip following cross-sectional contour ,

In particular, in this context, it is preferred that in the packaging state, the similar compression is achieved by an insert part assigned to the region which has a lower height in the completely reset state, that is to say the low region. This insert may be a strip-shaped part, as it basically already from the aforementioned EP 1 811 111 A2 is known. However, it is only inserted so that it is removable at any time after release of the provision and should also be removed as intended. The insert is only on the sealing strip; it is not connected with this. If, as is preferred, the foam-sealing strip has a self-adhesive layer (assigned to the rear or to the window frame), the insert is preferably arranged on the surface of the foam-sealing strip facing away from the self-adhesive layer. The surface of the foam sealing strip on which the insert part is arranged is accordingly preferably (alone) the surface of the low region.

The insert can basically also be a foam part. The foam part is in terms of its elasticity and resilience, which may also be a rigid foam part, designed so that it provides the desired same compression of the foam sealing strip in the packaging state over the entire width due to its size. The insert does not need to be completely removable his. It may also be provided, for example, only foldable.

In particular, the similar compression of the foam sealing strip across the width can be achieved by two oppositely directed identical foam-like sealing strips arranged at least partially overlapping one another. This means directed in opposite directions that the areas of greater height, the height areas, facing in opposite directions. With regard to a partial overlap on the one hand, only the areas of lesser height, the low areas, can be arranged one above the other. On the other hand, however, such foam sealing strips can also be superimposed overall, d. H. be arranged completely overlapping.

However, it is particularly preferred that the insert consists of a biodegradable material. This in view of the fact that the insert part, contrary to the additional part, as in the subject matter of the aforementioned EP 1 811 111 A2 is provided, is removed before installing the foam sealing strip of this or at least from the area where it was located in the packaging state. It is currently not or at least not fully or not installed in the packaging state given arrangement. Preferably, it is completely removed and disposed of as waste.

In the case of a biodegradable material, it can easily be disposed of on the construction site or, if necessary, even carelessly thrown away. It then does not lead to pollution or an environmental problem.

As biodegradable materials, various embodiments are offered in detail. For example, elements based on rye flour must be referenced. It may, for example, on the basis of rye flour, water, fine-grained aggregates such as kieselguhr and lime, wood fibers in bale or jute fabric, preferably also by foaming, a solid state part can be achieved, which is favorable for the purpose used here. For this is about the revelation in the DE 10 2004 024 251 A1 to refer. Also on the DE 10 2004 024 249 B1 ,

In particular, it may also be a biodegradable plastic which is based as a main component on flour, which in turn is obtained by mill-technical fractionation from rye. The material is then in the form of granules, which in Plastic extrusion or plastic injection molding machines can be processed. When finished, it prefers a frothy character. In particular, it may be a material known under the trade name GETREX.

In particular, the insert part can also be a blank part, that is, for example cut from a wider part.

• Fig. 1 eine perspektivische, schematische Ansicht eines zur Rolle aufgewickelten Schaumstoff-Dichtstreifens;
• Fig. 2 eine Querschnittansicht des Schaumstoff-Dichtstreifens gemäß Fig. 1 mit strichlinierter Darstellung des Zustandes vollständiger Rückstellung;
• Fig. 2a hinsichtlich der Kontur abgewandelte Ausführungsform;
• Fig. 3 den Gegenstand gemäß Fig.1 bzw. Fig. 2 im Einbauzustand;
• Fig. 4 prinzipielle Schnittdarstellung zweier gegensinnig, übereinanderliegend angeordneter nicht erfindungsgemäßer Schaumstoff-Dichtstreifen;
• Fig. 5 eine schematische Darstellung gemäß Fig. 4 eines nicht erfindungsgemäßen Schaumstoff-Dichtstreifens mit einem klappverbundenen Einlegeteil;
• Fig. 6 eine Darstellung des nicht erfindungsgemäßen Schaumstoff-Dichtstreifens gemäß Fig. 5, im zurückgeklappten Zustand;
• Fig. 7 eine Darstellung gemäß Fig. 1, jedoch bei einer Ausbildung eines nicht erfindungsgemäßen Schaumstoffstreifens mit zwei Höhenbereichen;
• Fig. 8 eine Darstellung gemäß Fig. 2 des nicht erfindungsgemäßen Schaumstoff-Dichtstreifens gemäß Fig. 7;
• Fig. 8a eine hinsichtlich der Kontur abgewandelte Ausführungsform eines nicht erfindungsgemäßen Schaumstoff-Dichtstreifens;
• Fig. 9 eine Darstellung gemäß Fig. 3 des nicht erfindungsgemäßen Schaumstoff-Dichtstreifens gemäß Fig. 7;

In the following, the invention will be explained further with reference to the attached drawing, which, however, represents only one embodiment. Hereby shows:

• Fig. 1 a perspective, schematic view of a wound on the roll foam sealing strip;
• Fig. 2 a cross-sectional view of the foam sealing strip according to Fig. 1 with dashed representation of the state of full provision;
• Fig. 2a with respect to the contour modified embodiment;
• Fig. 3 the object according to Fig.1 or. Fig. 2 in the installed state;
• Fig. 4 schematic sectional view of two oppositely arranged, one above the other arranged non-inventive foam sealing strip;
• Fig. 5 a schematic representation according to Fig. 4 a non-inventive foam sealing strip with a hinged insert;
• Fig. 6 a representation of the non-inventive foam sealing strip according to Fig. 5 in the folded-back state;
• Fig. 7 a representation according to Fig. 1 , but in an embodiment of a non-inventive foam strip with two height ranges;
• Fig. 8 a representation according to Fig. 2 of the non-inventive foam sealing strip according to Fig. 7 ;
• Fig. 8a a variant of the contour modified embodiment of a non-inventive foam sealing strip;
• Fig. 9 a representation according to Fig. 3 of the non-inventive foam sealing strip according to Fig. 7 ;

Shown and described is first with reference to Fig. 1 a wound to a roll 1 foam sealing strip 2, in the delivery or packaging state, approximately wound up on a roll as in Fig. 1 shown, having a non-uniform width across the width (without the insert 10). The foam-sealing strip 2 can also be wound without the insert 10 to a roll. In this case, it has a rectangular or approximately rectangular profile on the roll. The foam sealing strip 2 is (also) in the fully retracted condition, see Fig. 2 or. Fig. 2a , a (geometrically similar) across the width uneven profile. Assigned to a first narrow edge side 3 is given a smaller height h (thickness), that is to say a low region 14 is formed, and a second narrow edge side 4 is assigned a greater height H (thickness), ie a height region 15. The height portion 15 and the lower portion 14 are formed in alignment with a longitudinal direction of the foam sealing strip. Over the length of the foam-sealing strip 2 is always given the same cross-sectional profile. As installed, see Fig. 3 , Due to the given, over the width of the window practically the same sealing gap between a window frame 5 and a wall reveal 6 a maximum and over the width of the sealing gap (dimensions perpendicular to the plane of an example. Window frame) is given virtually the same expansion of the foam sealing strip 2, resulting in the narrow edge side 4 associated height range 15 (the foam sealing strip can only to a lesser extent expand) a higher permanent compression of the foam strip than in the narrow edge side 3 associated low region 14. Here, the narrow edge side 4 faces the interior of a building. This results in the desired lower vapor permeability inside towards the outside. A base surface F of the foam sealing strip forming foam is flat and extended over the entire width B. This also applies, for example, the below explained in particular in more detail embodiments according to the FIG. 8a ,

It is possible that in the packaging state according to Fig. 1 when provided, the insert 10 provides for uniform compression across the width. The insert 10 complements the low region 14 so that the outer surface of the insert 10 is aligned with the associated surface of the height portion 15. In any case, for the dimensions given here preferably, wherein the height h is between 60 and 70% of the height H and open-cell flexible polymer foam is used, but such insert has been found to be unnecessary.

In Fig. 2 is shown in a dashed line, as (qualitatively) a non-inventive foam sealing strip 2 would look at full expansion (the insert 10 is then removed). This can be geometrically similar to the compressed state, which is the representation of the Fig. 2 corresponds to when a corresponding insert 10 is used in the compressed state. However, the step between the low region 14 and the high region 15 also becomes correspondingly larger. In the compressed state, therefore, regardless of the non-uniform across the width profile of the foam sealing strip when using an insert a virtually equal degree of compression is given. The ratio between the height in the fully retracted state to the height in the compressed state is then the same across the width. It is also essential that the self-adhesive layer 7 desired for installation and the covering layer 8 located thereon are formed on the broad side of the foam-sealing strip 2 facing away from the profiling 9 of the foam-sealing strip. The possibly used Insert 10 can be easily removed and disposed of after unwinding of the foam sealing strip from the roll.

Specifically, the insert 10 is one made of a biodegradable material, as described earlier.

The height range 15, which is assigned in the embodiment of the narrow side 4, may extend in the width direction over 5% or more of the total width of the foam sealing strip. Preferably up to half, that is 50% of the width of the foam sealing strip. In the case of a symmetrical design, see below, the height range 15 preferably extends to about 40% or 45% of the width of the foam strip 2. Both height ranges 15 may be correspondingly up to about 80% to 90% of the width of the foam strip 2 extend. In this case, all intermediate values, in particular in 1/10% steps, are included as disclosed in the specified ranges.

It is also preferred that the unilaterally greater height of the foam-sealing strip given in the expanded state exceeds the height of the area of lesser height by 5% or more. In particular, up to 50%. In the same way, the intermediate values, in particular in 1/10% steps, are also included here as disclosed.

The width of such a sealing strip may, for example, be between 40 and 120 mm, but also beyond. The height of the fully restored foam may be in the range of lesser height (thickness), for example. 30 to 100 mm, or even beyond. The respective intermediate values, in particular in 1/10-millimeter increments, are also included in these ranges as disclosed.

The cross section of the sealing strip may be composed of a rectangular section (over the entire width) and a square or rectangular section arranged on one side (relative to the fully expanded state). While both the narrow edge sides forming sides of the foam sealing strip are straight, preferably rectangular to the self-adhesive strip having base, the transition from the region of greater thickness to the region of lesser thickness parallel to a narrow edge side or with a cross-section in the tip Angle to a narrow edge side extending surface may be formed. According to the invention, however, that the peripheral edge forming the one height range and a low range has a constant curvature, cf. approximately FIGS. 2a and 8a (the latter not according to the invention). However, this only describes the geometric shape. The foam sealing strip is preferably formed integrally with respect to the overall cross-sectional geometry.

With reference to the FIGS. 4 and 5 further embodiments not according to the invention are shown.

When non-inventive object of Fig. 4 two foam sealing strips 2, 2 'are arranged one above the other, so that they are directed in opposite directions. The areas of greater height are juxtaposed in this cross-sectional view, but arranged facing in opposite directions. Each height range is associated with a region of lesser height of the other foam sealing strip opposite. Such a combined arrangement of similar foam sealing strips 2, 2 'can be wound in the same way on a roll produced as a commercial product, as with regard to Fig. 1 is explained. In a variant, the foam sealing strips 2, 2 'could also be arranged one above the other only in the areas of lesser height. The formally complementary foam sealing strips 2, 2 'can achieve a uniform compression in the installed state, without the need for an insert 10. Seen in this way, one foam-sealing strip 2 acts as an insert for the other foam-sealing strip 2 'or vice versa.

When non-inventive object of Fig. 5 is given a packaging state in which a portion 11 of a foam sealing strip 2 is folded over on the foam sealing strip 2, that it complements the area of lesser height of the foam sealing strip 2 to a same height, as given in the height range 15 , To install such a foam sealing strip 2, the area 11 can be folded back, so that the configuration according to Fig. 6 results, which at the same time also the initial configuration before the packaging state according to Fig. 5 is. Of course, for the actual installation then still the cover layer 8 or 8 'are deducted. In terms of production, for this purpose, in an integral starting product, a non-continuous separating cut 13 (FIG. Fig. 6 ). The separating cut 13 has also divided the covering layer 8 and the self-adhesive layer 7 into partial regions 8, 8 'and 7, 7'. Also this embodiment makes it possible to achieve uniform compression in the packaging state without the need for an additional part such as an insert 10.

The given over the remaining web 12 integral connection of the two folding associated parts of the foam sealing strip represents an embodiment which may also be modified in that the parts are fully severed or a different or other foam part 11 in the Fig. 5 appropriate manner is placed on the foam sealing strip in the packaging state. Such another kind or other foam part would not necessarily have a self-adhesive layer 7 'and / or a cover layer 8' have.

The non-inventive embodiment of FIGS. 7 to 9 shows a foam sealing strip 2 ", which has two height regions 15 and a low region 14. The height regions 15 are in this case by the low region 14 - with respect to a cross-sectional view, see Fig. 8 - distant. Such a configuration is particularly advantageous when it does not primarily concern a different vapor permeability of the side areas, although here, too, by a still different height extent of the height regions 15 about, or a corresponding impregnation (see. EP 1 811 111 A2 ) Such can be achieved. The low region 14 can achieve a higher insulation value in the installed state, so that despite the comparatively high sealing force in the side regions, a comparatively high thermal resistance value, ie a high thermal insulation value, can be achieved.

Fig. 8a shows the already mentioned preferred curved profile.

Incidentally, the same conditions as in the previously described embodiments result in principle. In turn, an insert 10 may be inserted into the lower region 14, in order to be in the packaging state, that is to say preferably in accordance with a roll 1, cf. Fig. 7 The height regions 15 and the low region 14 extend in alignment with the longitudinal direction, In particular, in the embodiment a symmetry is also given to a central longitudinal plane EE of the foam sealing strip 2 ".

In the installed state, approximately according to Figures 3 and 9 , are the altitude range or the both edge regions of higher compression compared to the low region or the middle region of lower compression illustrated by different hatching.

The in the FIGS. 1 and 7 shown roles are reproduced only for clarity with not adjacent to each other turns. Usually, the turns are close to each other. The foam is preferably at least partially open-celled and elastically resilient soft foam. For example, flexible polyurethane foam.

In Fig. 8a is a (not inventive) straight transition, but here with clearly curved end portions, which provide the actual transition to the low range or to the level of the height range provided.

It is also important that in the illustrated embodiments, the base surface F, as they are only in the example Figures 2 and 2a is a flat surface that extends across the entire width of the given base surface. Based on this base area results in the curved cross-section transition between a height range and a low range, as already described. In the curved course, the curvature is provided so that there is a turning point, such as the representation of the Fig. 2a can be seen.

A fully recovered height H of the foam sealing strip preferably corresponds to half to 1.5 times the width B of the sealing strip, for example, the width of the width B. This is obviously all the inventive and non-inventive embodiments, in particular the embodiments of FIGS. 2a and 8a ,

Claims (12)

1. Foam material sealing strip (2, 2', 2") which is suitable for sealing for example of a window frame (5) and is impregnated for delayed recovery, wherein the foam material sealing strip (2, 2', 2") comprises, on the basis of a cross-section, two opposing narrow sides (3, 4) in each case facing the inner side or the outer side of the window frame (5) in the installed state, and wide sides suitable for abutting the side of the window or reveal (6), wherein, furthermore, in the completely recovered state at least one edge region of the cross-section formed as a high region (15) starting from a base face (F) provided on the wide side has a greater height than a low region (14) adjoining it in the width direction, wherein the high region (15) and the low region (14) extend in alignment with a longitudinal direction of the foam material sealing strip (2, 2', 2") and wherein the base face (F) is a planar face and extends over the entire width, and wherein in the width direction the low region (14) is one tenth or more of the dimension of a wide side, wherein in each case based on the completely reset state the height (h) of the low region (14) is between 60 % and 80 % of the height (H) of the high region (15), wherein in the completely recovered state a surface which is curved in cross-section is provided on the face opposite the base face (F), and wherein only one edge-side high region is provided and the width of the sealing strip is between 40 und 120 mm, or even more, characterised in that the base face is formed by the foam material itself having a one-piece cross-section and the line of curvature has an inflection point in cross-section.
2. Foam material sealing strip according to claim 1, characterised in that in the completely recovered state at least one edge region of the cross-section formed as a high region (15) starting from a planar base face (F) provided on the wide side has a greater height than a low region (14) extending in the width direction, wherein the high region is achieved by the first impregnated foam material sealing strip (2) which forms the low region (14) being built up in a tiered manner by a second impregnated foam material sealing strip (16).
3. Foam material sealing strip according to one or more of the preceding claims,
   characterised in that

   (i) the low region (14) has up to nine tenths the dimension of a wide side
   and/or

   (ii) the sealing strip is formed symmetrically with respect to a centre plane extending transversely in relation to a wide side.
4. Foam material sealing strip according to one or more of the preceding claims, characterised in that - in each case based on a completely recovered state - the height (h) of the low region (14) corresponds to 60 % to 70 % of the height (H) of the high region (15).
5. Foam material sealing strip according to one or more of the preceding claims, characterised in that based on a high region (15) the completely recovered height (H) of the foam material sealing strip is half to one and a half times the width (B) of the sealing strip.
6. Foam material sealing strip according to one or more of the preceding claims, characterised in that the foam material sealing strip (2, 2', 2") in the packed state has a uniform compression over its width.
7. Foam material sealing strip according to claim 6, characterised in that in the foam material sealing strip (2, 2', 2") in the packed state the uniform compression is achieved by an insert part associated with the low region (14).
8. Foam material sealing strip according to claim 7, characterised in that (i) the insert part is formed as a strip and/or (ii) that the insert part is made of a biodegradable material and/or (iii) that the insert part is a foam material part (11).
9. Foam material sealing strip according to the preceding claim, characterised in that the uniform compression over the width is achieved by two foam material sealing strips (2, 2') which are arranged at least partially overlapping one another and are directed in opposite directions.
10. Foam material sealing strip according to claim 9, characterised in that the two foam material sealing strips (2, 2') have the same shape.
11. Foam material sealing strip according to claim 7, characterised in that the insert part formed as a foam material (11) is a hinge-connected part of the foam material sealing strip (2).
12. Foam material sealing strip according to claim 11, characterised in that the insert part is formed by a separating cut which does not cut through the foam material sealing strip.

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