EP2806082A1 - Method for forming a seal between two wall panels - Google Patents

Abstract

The invention relates to a method for producing a seal (11) between two wall plates (12, 13) arranged edge-to-edge (16) along their adjacent edges (14, 15,) according to which one sets up of the coating (19) and a strip (17) of paper, and such that the paper web (17) is fixed in direct contact with the adjacent edges (14, 15) with an adhesive (18) previously spread on those the paper web (17) and the glue (18) for joining the two wall plates (12, 13); a coating layer (19) is then applied to and on both sides of the paper web (17) and a surface continuity is achieved between the faces of the two adjacent wall plates beyond the web. paper (17) covered with a thin thickness of said coating.

Description

The present invention relates generally to the field of joints formed between two wall plates, essentially plaster, arranged edge to edge, either flat to form a plane wall or angle.

The state-of-the-art technique to achieve them today is illustrated with reference to the Figures 1A and 1B .

The seals 1 are made by placing a coating or filling material and a reinforcing strip 8, usually made of paper, between adjacent edges and chamfering 2 and 3 of two gypsum boards 4 and 5, the place of a volume to be filled 6 constituted by a thinning of the edges 2, 3 which are of a smaller thickness than the rest of the plates, generally made by a chamfer or a groove as shown respectively on the Figures 1B in section and 1A in semi-exploded perspective.

The reinforcing strip 8 is used to improve the mechanical behavior of the seal and prevent the appearance of cracks.

The state of the art production method is as follows.

In a first and second step, a first layer 7 of filling material is disposed in the volume to be filled 6 on the adjacent edges 2 and 3, then a reinforcing strip 8 is disposed on this first layer 7 of still fresh filling material which also ensures the bonding of the reinforcing strip 8.

Then, in a third step, a second layer 9 of filler material or coating that completes the bonding, is disposed on the reinforcing strip 8 to finish filling the volume 6.

Then, in a fourth and fifth, at least steps, with an intermediate drying time between each layer, several successive finishing layers 10, made with the same coating as that used for the layers of filling material, or a coating of specific finishing are arranged on the second layer 9 of filling material, and finally in the last step sanding is performed.

By way of example, for such known production methods, the document WO 2012/167132 filed by the company Saint Gobain Adfors Canada, and which describes a self-adhesive band mesh and porous able to pass through a composite product filling and filling through its mesh, the self-adhesive tape having the role of reinforcing the joint between the plasterboard, which joint is constituted by the composite product.

In addition, the document US 2008/0302047 Mr. Steven Schraga describes a joint between two plasterboard consisting of an articulated flap made by the cover paper of one of the two gypsum board, which paper must then be wider than this to cover the edge of the plasterboard. Another: such a method, as also that of the previous patent, therefore does not adapt to all cases of figures such as angles or for the assembly of plasterboard cut, as is the case when one wants to reuse falls.

The various operations mentioned above, such as those described in these documents of the prior art, require on the one hand a know-how and control on the part of the plasterer, and on the other hand plasterboard with edges prepared at the factory. , in particular thinned such as by a chamfer or a longitudinal half groove because otherwise the thickness of the coating, necessarily important to ensure the seal between the plates, would not allow to obtain a surface continuity between the plasterboard without significant elevation of the surface at the joint, which would be unsightly.

Thus, such methods can not be used to repair cracks in wall elements regardless of the material of the latter.

In addition, the first layer 7 of filling material must be on its side made thin to be able to deposit, precisely without risk of excess thickness, the reinforcing strip 8 and the second layer 9 of filling material, and on the contrary s' there is not enough coating in the first layer 7, or if the filler has dried too much before laying the band 8, it can blister: only a professional can acquire the necessary know-how on the one hand to the correct dosage of the amounts of filling material and on the other hand to the good spreading thereof.

The reinforcing strip 8 paper may not stick due to the lack of filling material that escapes from the volume 6, due to too much pressure from the plaquiste.

The reinforcing tape 8 made of paper can blister as a result of the entrapment of air between the layer 7 of filling material and the reinforcing strip 8.

Moreover, too much sanding of the finishing layers 10 may bring out the reinforcing strip 8 of the seal 1, if it has been passed too much outside the seal 6, which is not desired.

Such known methods are also difficult to implement in the corners without risk of significant irregularities, and can in any case give only fragile angles (see the representation of the figure 3A ) because a thick coating thickness can be chipped in case of even slight impact on its corners. In any case, they are therefore not within the reach of an uninitiated "amateur".

In this context, the present invention aims to provide a method that solves these difficulties of the prior art technique.

This method allows the realization of a joint between two elements of wall plates, which may be in plaster or other material, arranged edge to edge along their adjacent edges: according to the principles of the prior art known, it sets up a material capable of being fixed to the wall plate elements, such as the coating of the prior art, and a paper strip, independent and distinct from the wall plate elements, said paper strip and said material covering the edges adjacent wall plate members and forming the joint therebetween.

• dans une première étape, on étale préalablement de la colle, de préférence sur une épaisseur de moins de 60/1000^ème mm sur une partie des faces des éléments de plaques de paroi, de part et d'autre de la jonction de leurs bords adjacents et suivant au moins une largeur correspondant à celle de la bande en papier, ou en variante on encolle une face de la bande en papier ;
• dans une deuxième étape, on dépose la bande en papier d'épaisseur en général de 25/1000^ème mm, de surface continue, de préférence sans ouverture, c'est-à-dire non perforée, en contact direct contre les parties des faces des éléments de plaques enduites de colle, ou non si c'est la bande en papier qui est préalablement encollée, le collage de cette bande en papier étant apte à fixer celle-ci et joindre les deux éléments de plaques de paroi ;
• on appuie sur la bande en papier afin de la lisser et de la fixer à plat sur les bords adjacents sans créer de surépaisseur significative, soit au maximum 25/1000^ème mm après séchage, car la colle se retraint avec le séchage, et évite ainsi toute surépaisseur importante en plus de la bande de papier et on laisse alors s'écouler un temps de séchage donné de la colle tel que 12 heures environ et
• dans un mode de réalisation préférentiel on applique ensuite une couche d'enduit de faible épaisseur telle que de 25/1000^ème sur et de part et d'autre de la bande en papier, cette faible épaisseur ne nécessitant pas ainsi de couche finale de finition, et on réalise une continuité de surface entre les faces des deux éléments de plaques de paroi adjacents au-delà de la bande en papier recouverte de ladite couche d'enduit; de plus, cette couche d'enduit peut être inutile en particulier si la paroi est recouverte ensuite de carrelages ou d'enduits décoratifs (tadelakt, stuk...).

According to the invention, the process is remarkable in that:

• in a first step, glue is preferably spread, preferably to a thickness of less than 60/1000 ^th mm on a part of the faces of the wall plate elements, on either side of the junction of their adjacent edges and following at least one width corresponding to that of the paper web, or alternatively one side of the paper web is glued;
• in a second step, the strip is deposited in paper of thickness generally 25/1000 ^th mm, continuous surface, preferably without opening, that is to say non-perforated, in direct contact against the parts of the faces glued plate elements, or not if it is the paper tape which is previously glued, the gluing of this paper tape being adapted to fix it and join the two elements of wall plates;
• the paper web is pressed in order to smooth it and fix it flat on the adjacent edges without creating significant excess thickness, ie at most 25/1000 ^th mm after drying, because the glue is removed with drying, and thus avoids any significant extra thickness in addition to the paper web and then let a given drying time of the glue such as about 12 hours and
• in a preferred embodiment is then applied a layer of thin coating such as 25/1000 ^th on and on both sides of the paper web, this small thickness thus not requiring final finishing layer and providing surface continuity between the faces of the two adjacent wall plate members beyond the paper web covered with said plaster layer; in addition, this coating layer may be unnecessary especially if the wall is then covered with tiles or decorative coatings (tadelakt, stuk ...).

Thus, taking the values of the three thicknesses above, we obtain, by the method of the invention, a final thickness relative to the initial surfaces of the wall plates of 75/1000 ^th mm maximum, and even only 50 / 1000 ^th maximum without the coating layer.

The invention also relates to a wall having at least two wall plate members, such as plaster, disposed edge-to-edge along their adjacent edges and joined by a joint which comprises plaster and a separate and distinct paper web elements of wall plates and such that the paper web is fixed without coating directly on and against a part of the faces of the plate elements on either side of the joining the adjacent edges with an adhesive, and the coating, arranged in a thin layer only on the strip of paper and on both sides thereof, provides a surface continuity between the faces of the two adjacent wall plate members beyond the paper web covered with said plaster layer.

In one embodiment, the wall plate members are arranged in parallel, aligned with one another and their surface are in the same plane as shown in the drawings. Figures 2A and 2B .

In another embodiment, the wall plates form a non-zero angle between them as shown in FIGS. Figures 4A and 4B .

The result is on the one hand a new process for making a joint between two wall plates or between two elements of the same plate in case of crack repair, and on the other hand walls with at least two elements of the same. wall plates assembled by a new seal according to the invention: this satisfies the problem posed by all the disadvantages previously reported in the prior art, and which does not require, in particular, thinned or specially prepared edges; the present invention allows a direct application between two plates with straight edges, which makes it possible to manufacture such plates directly as well, and reduces the cost, and also as it happens when cutting plates thinned edges so not right to adapt them at a given wall length.

The present invention also makes it possible to make corner joints easily without irregularity, and not very fragile because in case of shock the small thickness of the coating has little risk of being chipped.

The gluing of the paper tape by a specific glue is better than by a coating that has a lower bonding capacity.

The present invention makes it possible to use much less plaster or composite product as in the prior art because it is the combination of the paper strip and the glue that ensures the strength of the joint and not the coating or the coating. composite product: in the prior art, the paper tape is indeed a reinforcing tape, designated from the rest as well in the earlier documents.

The strength and quality obtained are better and the method according to the invention allows a saving of time and coating, which reduces the cost of the operation and allows easy and clean use by uninitiated people who can need only a brush, specific glue and paper tape to achieve a seal of quality and without risk of blisters due to the drying of the filler as in the current processes, and ensures a sticky power more effective (acting as a weld), and this regardless of the nature of the material of the wall plate elements, either to ensure the joint between two plates, or to repair a crack in a plate (and that is why we are talking about plate elements to cover these two types of applications).

In addition, such a method, and walls thus obtained according to the invention, provides at least temporary resistance of the seal to moisture in case of accidental water leakage which humidifies the wall.

• la figure 2A qui représente une vue perspective d'une paroi en semi-éclatée présentant deux plaques de plâtre disposées bord à bord et assemblées par un joint suivant l'invention,
• la figure 2B qui est une vue en coupe de la figure 2A suivant un plan perpendiculaire à celui de la paroi, et avec un agrandissement partiel au niveau du bord de la bande de papier.
• les figures 3A et 3B représentent des vues en coupe de l'art antérieur pour des plaques de plâtre formant un angle non nul entre elles,
• les figures 4A et 4B représentant la même disposition de plaques de plâtre que les figures 3 mais assemblées suivant un joint de la présente invention.

Other features and advantages of the invention will emerge clearly from the description which is given below, by way of indication and in no way limiting, with reference to the figures and in which one will take as an example joints between two elements of plasterboard :

• the Figure 2A which represents a perspective view of a semi-exploded wall having two gypsum boards arranged edge to edge and assembled by a joint according to the invention,
• the Figure 2B which is a sectional view of the Figure 2A in a plane perpendicular to that of the wall, and with a partial enlargement at the edge of the paper web.
• the Figures 3A and 3B represent sectional views of the prior art for plasterboard forming a non-zero angle between them,
• the Figures 4A and 4B representing the same layout of drywall as the figures 3 but assembled according to a seal of the present invention.

The wall has two gypsum boards 12, 13 having adjacent edges 14, 15 disposed edge to edge and forming a junction 16 covered by the seal 11 of the invention.

A strip 17 of paper is placed directly on the adjacent edges 14, 15 with the aid of an adhesive 18, and a layer of coating 19 covers the paper strip 17 is also deposited around it so that that there is a continuity between the paper covering the surface and the plasterboard and the edges of the paper web 17: a very thin layer of coating is deposited either with a thickness e ₁₉ at most equal to that of the strip of paper glued at the outer limit of the edges thereof +25/1000 ^th maximum thickness, thus forming a total maximum thickness e ₁ in the middle of the joint 1 of 75/1000 ^th and which decreases until Zero beyond the edges of the paper web.

The reinforcing strip 17 and the glue 18 serve to join the two gypsum boards 12, 13, acting as a junction or a mechanical connection between the two gypsum boards 12, 13.

The glue 18 is a substance for fixing the paper web 17 directly on the adjacent edges 14, 15: this paper web 17 may be the one used to date in the known methods of gluing, filling and plaster splicing; the thickness of this paper web is chosen (such as for example between 20/1000 ^th and 1/10 ^th mm, and in general 25/1000 ^th ) according to the desired resistance.

The adhesive has a thin layer that is spread over a thickness of preferably less than 60/1000 ^th mm and even only a few microns, knowing that in the end once the paper tape glued and smoothed, the thickness this adhesive is only from 0 to 25/1000 ^th mm after drying.

It can be a high strength paper glue.

For example, and preferably, it is possible to use a glue 18 for a glass fabric, or a wallpaper glue, such as non-soluble vinyl glue, composed of ethylene vinyl acetate in dispersion, of starch of ether, water and additives. Such an adhesive is in the form of density paste between 1.05 and 1.10 g / cm ³ having a dynamic viscosity of between 18 and 23 Pascalsec (P _a .s) at 23 ° C; its PH can be between 9.5 and 10.5.

• dans un premier temps, on étale préalablement de la colle 18 sur une partie des faces des éléments de plaques 12, 13 de part et d'autre de leur jonction 16 entre leurs bords adjacents 14, 15 suivant au moins une largeur correspondant à celle de la bande 17 en papier, et si nécessaire on utilise la colle surtout quand elle est sous forme de pâte pour combler tout espace entre les bords adjacents quand ils ne sont pas jointifs,
• on dépose la bande en papier 17, de surface continue et sans ouverture en contact direct contre les parties des faces des éléments des plaques enduites de colle fraiche 18, le collage de cette bande 17 étant apte à fixer celle-ci et à joindre les deux éléments de plaques de paroi, ici en plâtre 12, 13,
• on applique ensuite, sauf donc dans le cas de pose de carrelage ou autre enduit décoratif qui serait appliqué directement sur la bande de papier, une couche d'enduit 19 de faible épaisseur sur et de part et d'autre de la bande en papier 17, et on réalise une continuité de surface entre les faces des deux éléments de plaques de paroi, en plâtre, adjacentes, au-delà de la bande en papier 17 recouverte de ladite couche d'enduit.

In other words, the process for producing the gasket 11 between the two plaster wall plate elements 12, 13 in the present preferred embodiment only has three stages and even two in the case of use. before tiling for example during which:

• in a first step, glue 18 is first spread over part of the faces of the plate elements 12, 13 on either side of their junction 16 between their adjacent edges 14, 15 along at least one width corresponding to that of the strip 17 paper, and if necessary we use the glue especially when it is in the form of paste to fill any space between the adjacent edges when they are not joined,
• the paper strip 17, of continuous surface and without opening, is deposited in direct contact with the parts of the faces of the elements of the plates coated with fresh glue 18, the bonding of this strip 17 being able to fix it and to join the two elements of wall plates, here in plaster 12, 13,
• thereafter, except in the case of installation of tiles or other decorative coating that would be applied directly to the paper web, a layer of plaster 19 of thin thickness on and on both sides of the paper web 17 and providing surface continuity between the faces of the two adjacent plasterboard wallboard members beyond the paper web 17 covered with said plaster layer.

The use of paper tape 17 bonded 18 simplifies the implementation of the jointing plasterboard 12, 13 and performs the same function as the first layer of filling material and bonding paper reinforcement of the prior art.

The glue 18 may for example be applied using a simple brush, which makes the realization of the invention simple.

As an alternative embodiment, the paper web 17 may also be previously glued, instead of the edge surface of the plate elements, without this being considered as a different process from that claimed.

After spreading the paper web 17 on the adjacent edges 14, 15, the paper web 17 is pressed to flatten it flat on the adjacent edges 14, 15 before application of the plaster layer 19.

A given drying time of the glue 18 is allowed to pass before applying the coating layer 19.

The drying time depends in particular on the glue used, the humidity level in the air, and can be fast or long.

It can be for example from a few minutes to a few hours.

The drying time with glue 18 for glass fabric can be for example 12 hours.

The seal 11 is made at adjacent edges 14, 15 which can be straight without chamfer, the wall plate members, such as plaster, 12, 13 being arranged at straight edges, i.e. having the same thickness as the rest of the elements of said plates.

The adjacent straight edges have the same thickness as the rest of said plates located between the walls of each gypsum board 12, 13 forming the partition as illustrated in FIGS. figures 2 and 4 .

Here, on Figures 2A and 2B , the gypsum board elements 12, 13 are arranged parallel and aligned with each other.

Following the representation of figures 3 of the prior art, the gypsum boards 12, 13 are arranged so that they form a non-zero angle between them is here in this case 90 °, the seal 1 being formed on adjacent edges 14, 15 thinned by a chamfer which is filled by a first layer of plaster 7 before the removal of the reinforcing strip 17 then covered again as in the example of the Figure 1A and 1B by coating layers 9, 10 which form a fairly large thickness, which weakens the angle especially when it is out as in the figure 3A and can not be performed without risk of irregularities.

In the case of the invention as represented on the Figures 4A and 4B , just put a lot less coating to make the continuity with the paper strip 17 because of the very small thickness of the glue and the paper strip 17, in the absence of chamfer.

In the example of Figures 3 and 4 , the plasterboard 12, 13 have a right angle between them: according to the present invention shown on the Figures 4A and 4B in this case, a paper strip 17 having a pre-fold 22 is used at the junction 16 between the two said wall plates, such as plaster.

The seal 11 may be arranged along the entire height of the two plasterboards 12, 13.

The seal 11 may also be arranged along the entire length of the two gypsum boards 12, 13 when they are arranged one above the other, and in all cases the adjacent edges 14, 15 are fixed in a known manner (as shown in the Figures 1B and 2B ) by bonding with an adhesive mortar or nails or screws 20 passing through these adjacent edges, on a frame 21 placed behind the plasterboard 12, 13.

The paper web 17 has a rectangular longitudinal shape, the seal extending longitudinally.

The paper strip 17 may have metal reinforcements, in particular if it is used at the level of two gypsum boards 12, 13 which have a non-zero exit angle between them, such as in the example of the Figure 4A to strengthen this angle which is then exposed to shocks.

The method can be used by the uninitiated, since it only requires the bonding of the paper web 17 and then deposits a small thickness of coating to cover it and ensure surface continuity between the two elements of drywall 12, 13.

The paper strip 17 is thus found directly against the elements of drywall, set back from the coating 19.

Finally, thanks to the method according to the invention, the strength and quality of the seal 11 are improved.

In addition, the working time of the plasterer is reduced because among other things the operation of depositing glue on the adjacent edges of the plasterboard is faster than that of removing the layer of filler material 7 bonding.

With the replacement of the coating of filling material reinforced with a paper web according to the state of the art by the single glued paper, it can then be used the same filling compound as that used in the state of the art. or another less tacky filler or finish coating, for example.

The filler material coating used in the invention may in particular be shrinkage compensated or not.

Thus when the adjacent edges of the plasterboard are straight, that is to say they are not thinned, the glue does not create an extra thickness, as it would be the case today with the use of a plasterboard. filling used for gluing.

Claims (13)

A method for producing a seal (11) between two edge-to-edge wall plate members (12, 13) along their adjacent edges (14, 15) and in which a material suitable for attaching to the wall plate members (19) and a paper web (17) independent and distinct from the wall plate members (12, 13), said material (19) and the edge covering strip (17) adjacent (14, 15), characterized in that : - glue (18) is previously spread on a part of the faces of the plate elements (12, 13) on either side of the junction (16) of their adjacent edges (14, 15) and following at least one width corresponding to that of the strip (17) of paper, the continuous-surface paper web (17) is deposited in direct contact with the parts of the faces of the adhesive-coated plate elements (18), and the paper web (17) is pressed in order to smooth it, bonding of this strip (17) being able to fix it and to join the two elements of wall plates (12, 13). Process for the production of a gasket (11) according to Claim 1, characterized in that a thin layer of coating (19) is subsequently applied to and on both sides of the paper web (17) and providing surface continuity between the faces of the two adjacent wall plate members beyond the paper web (17) covered with said plaster layer. Method according to claim 2, characterized in that the straight-sided wall plates (12, 13) having the same thickness as the rest of the elements of said plates are arranged. Process according to one of Claims 1 to 3, characterized in that non-soluble vinyl glue is used. Process according to claim 4, characterized in that vinyl glue composed of ethylene vinyl acetate in dispersion, ether starch, water and additives is used. Process according to one of Claims 1 to 5, characterized in that the wall plates (12, 13) are arranged at a non-zero angle to each other and a paper web (17) having a pre-fold is used. (22) at the junction (16) between the two said wall plates (12, 13). Process according to any one of Claims 1 to 5, characterized in that said adhesive (18) is spread over a thickness of less than 60/1000 ^th . Process according to any one of Claims 1 to 7, characterized in that non-soluble glue in the form of a paste having a density of between 1.05 and 1.10 g / cm 3 having a dynamic viscosity of between 18 and 23 Pa is used. at 23 ° C. Wall having at least two wall plate members (12, 13) disposed edge-to-edge (16) along their adjacent edges (14, 15) and joined by a gasket (11) which comprises a material adapted to attach to the elements wall plate (19) and a strip (17) of paper independent and distinct from the wall plate elements (12, 13) characterized in that the paper web (17) is fixed without coating directly on and against a part faces of the plate elements, on either side of the junction (16) of the adjacent edges (14, 15), using an adhesive (18). Wall according to claim 9, characterized in that a coating (19), arranged in a thin layer only on the paper strip (17) and on both sides of the strip, provides surface continuity. between the faces of the two adjacent wall plate members beyond the paper web (17) covered with said plaster layer (19). Wall according to one of claims 9 or 10, characterized in that the adjacent edges (14, 15) are straight having the same thickness as the rest of the plate elements. Wall according to any one of claims 9 to 11, characterized in that the paper web (17) has metal reinforcements. Wall according to any one of claims 9 to 12, characterized in that the glue is a non-soluble vinyl adhesive composed of ethylene vinyl acetate dispersion, ether starch, water and additives.

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