EP0804659B1 - Zinc roof covering - Google Patents
Zinc roof covering Download PDFInfo
- Publication number
- EP0804659B1 EP0804659B1 EP95942113A EP95942113A EP0804659B1 EP 0804659 B1 EP0804659 B1 EP 0804659B1 EP 95942113 A EP95942113 A EP 95942113A EP 95942113 A EP95942113 A EP 95942113A EP 0804659 B1 EP0804659 B1 EP 0804659B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polyester
- paint
- acrylic
- thickness
- micrometres
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/24—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like
- E04D3/30—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/02—Roof covering by making use of flat or curved slabs or stiff sheets of plane slabs, slates, or sheets, or in which the cross-section is unimportant
- E04D3/16—Roof covering by making use of flat or curved slabs or stiff sheets of plane slabs, slates, or sheets, or in which the cross-section is unimportant of metal
Definitions
- the present invention relates to a roof comprising a covering support on which a cover is laid, the cover comprising an assembly of sheets of zinc or galvanized steel having one side facing said support, said side being provided with a organic coating.
- Zinc covers are traditionally placed on ventilated fir supports. AT because of the high cost of this traditional support, we are looking to replace it with supports cheaper, in particular non-ventilated supports possibly not compatible with the zinc or galvanized steel such as particle board, plywood, concrete and rigid insulation. However, many corrosion phenomena of zinc coverings have been reported on these non-ventilated supports. To solve these problems it would be necessary, according to document EP-B-0410822, to improve the ventilation between the support of cover and zinc plates to avoid condensation and to isolate the zinc from the support non-ventilated, especially if the support is made of concrete.
- the object of the present invention is to provide a blanket as defined above, which avoids the disadvantages mentioned above.
- said support is non-ventilated and said covering has a thickness of 50 to 150 micrometers, is elastic, durable and waterproof to water vapor, the other side of the sheets being either uncoated or coated by any surface treatment process applied for purely aesthetic purposes.
- the coating quality it is highly recommended that it be applied continuously, in particular between a unwinding station and a winding station, at the zinc sheet producer or in a workshop specializing in application of coatings; the elasticity of the coating must therefore be such that the coated sheet can undergo, on the site or in the workshop of the roofer-zinc-worker, the shaping operations necessary for its installation without the coating being damaged. It is obvious that the coating must be hard enough so that the various manipulations, that the coated sheet must undergo until it is finally placed on the support, do not leave traces in the coating or in any case not deep traces. The thickness of at least 50 micrometers is essential to avoid for sure that possible small scratches undergone as a result of the above manipulations can not discover zinc.
- the coating cannot crack or flake, as it is essential that it remains waterproof to water vapor. It should be noted here that there is a perfect synergy between the zinc sheet and its coating in the sense that they protect each other against the worst of their respective enemies, namely ultraviolet radiation in the case coating and condensation in the case of zinc or galvanized steel.
- Document DE-A-3444669 describes strips of plastic covering of a thickness of about 5 mm, protected by a metallic film of about 0.05 mm on the face outside.
- the metallic film protects the synthetic material from atmospheric influences and also plays an aesthetic role.
- the document recommends a flexible synthetic material and foamy such as polyethylene or expanded polyurethane to promote insulation thermal and sonic; the metallic film can be copper, stainless steel or alloys based on aluminum. This document does not address the issue of ventilation of the media. roofing.
- Document FR-A-2471859 describes a metal sheet with composite coating for use in the production of exterior building materials.
- This sheet metal carries a coating of a composition containing a chloride resin polyvinyl, a powdered metal, a plasticizer and a stabilizing agent, this product having a excellent resistance to atmospheric factors, as shown by a test of accelerated aging entitled "Sunshine Weather Meter Test".
- galvanized sheets covered with either a layer of resin-based paint thermosetting, either a polyvinyl chloride film and / or polyacrylate do not not always suitable from an economic point of view and as regards their resistance for the production of exterior building materials.
- the coating may consist of a layer of paint based on polyester (standard symbol: SP), silicone polyester (SPSI), polyester polyamide (SPPA), epoxy (EP), polyurethane (PUR), polyvinylidene fluoride (PVDF) organosol chloride vinyl (PVCO), vinyl chloride plastisol (PVCP), acrylic (AY) or silicone acrylic (AYS), the thickness of the layer in the dry state being advantageously from 50 to 70 micrometers.
- the painting is advantageously carried out continuously at the sheet producer or in a painting workshop by depositing the paint in liquid or powder form and baking subsequent by passage through an oven. Preference is given to polyester paint deposited in powder form. Such a paint is marketed under the name "Beckryspeed®" by the firm BICHON S.A.
- the coating can also consist of an adhesive film of polyvinyl chloride (PVCF), polyvinyl fluoride (PVFF), acrylic (PMMAF), polyethylene (PEF), polyurethane or polyester, the thickness of the film advantageously being from 80 to 150 micrometers.
- PVCF polyvinyl chloride
- PVFF polyvinyl fluoride
- PMMAF acrylic
- PETF polyethylene
- polyurethane polyurethane
- polyester polyurethane or polyester
- the thickness of the film advantageously being from 80 to 150 micrometers.
- the application of film is advantageously carried out continuously by the sheet producer. Preference is granted to polyethylene film.
- An example of such a film is the low polyethylene adhesive film. density with a thickness of 100 micrometers, which is sold under the reference 4118 by NOVACEL S.A. for economic reasons, adhesive film coating is prefer to paint coating.
- the coating can also consist of a layer of paint as defined above, which is itself covered with an adhesive film as defined above. Needless to say, such coating is even more effective than coating with paint or adhesive film.
- the other side of the sheet is either uncoated or coated with any surface treatment process applied for purely aesthetic purposes. This is how example that this face can be prepatinated.
- the present invention also relates to the use of zinc or steel sheets galvanized, one side of which is provided with a coating as defined and described above and of which the other side is either uncoated or coated for purely aesthetic purposes, for the realization of the cover according to the invention, this embodiment comprising the operations of shaping the sheets necessary for their laying and the laying proper of the shaped sheets.
- the shaping and laying of coated sheets, supplied by the sheet producer, can be do according to current practice.
- a roll of rolled zinc is unwound on a line of finishing together with a roll of plastic film of the same width which includes one side covered with adhesive.
- the film After unwinding, the film is plated on the rolled zinc by means of a set of rollers pressers and the whole is rewound into a reel. This coil will then be cut into width and length suitable for use on construction sites.
- the thickness of zinc is that commonly used for roofing, between 0.65 and 1 mm.
- the plastic film is made of low density polyethylene 100 micrometers thick.
- the adhesive is a mixture of rubber and resin 10 micrometers thick.
- Zinc samples coated with the film were placed in an oven, at 100 ° C. for 6 months, either at 70 ° C for 8 months, or at 40 ° C for 15 months, durations which correspond to more than 10 years of real site exposure on a cover.
- Zinc samples coated with the film were placed in an oven for 60 days, ie at 90 ° C. either at 100 ° C. Beforehand we made folds and stampings on the samples to simulate the deformations that the product will undergo on a site.
- Film coated zinc samples underwent temperature cycles from -20 ° C to + 90 ° C to simulate in real time what is actually happening on a blanket. After 300 cycles (1400 hours) it can be seen that the film has remained well adhered. After 5 days of Kestemich trial (5 cycles) it is noted after removal of the film that the protected face is not corroded then that the other is excessively.
- a zinc coil After rolling, a zinc coil is subjected to a surface treatment operation by conversion, giving on both sides a surface layer of zinc phosphate, i.e. light gray in color, or dark gray in color, the zinc thus obtained being called prepatinated zinc.
- the pre-patinated zinc is rewound into a coil.
- the pre-weathered zinc coil undergoes the same operations as the rolled zinc coil in Example 1 and the material thus obtained is subjected to the same tests as the material obtained in example 1: the same results are obtained as in example 1.
- the zinc coil coated with example 1 was used to make a cover above a room in which water vapor has been produced.
- the interior of the room is maintained at 30 ° C with a relative humidity of 100% and its walls are thermally insulated so that moisture condenses preferentially on the face rolled zinc protected by the film.
- a roll of rolled zinc is unwound at a speed of 5m / min on a lacquering installation including a surface preparation station (degreasing, chemical conversion, rinsing, drying), a powder coating booth with powder guns for depositing on a face of rolled zinc a layer of more than 50 micrometers of powder, a polymerization oven at 250 ° C, a cooler and a rewinder. This coil will then be cut into width and length suitable for use on construction sites.
- the thickness of rolled zinc is that commonly used for roofing, between 0.65 and 1 mm.
- the powder is a "Beckryspeed®" polyester powder specially made to combine the performance and benefits of powder to continuous application technology. The following tests confirm the good performance of the coating. They were carried out on flat test pieces with a coating of 60 micrometers, including an Erichsen stamping according to ISO 1520, an impact stamping according to ISO 6272, and an OT fold on a side.
- test pieces underwent the accelerated salt spray corrosion test according to the NFX standard. 41002 for 1000 hours. After the test, it is found that the appearance of the coating has not been modified, even on deformed areas, when the unprotected side has been excessively corroded.
- test pieces underwent the Kestemich test, according to DIN 50017 for 1000 hours (42 cycles). After the test, it can be seen that the appearance of the coating has not been changed, even on the deformed areas, while the unprotected face has been uniformly corroded by the condensation, by the formation of white rust.
- Example 4 The operations and tests of Example 4 are repeated, but starting this time with a coil of pre-patinated zinc and the same results are obtained as in Example 4.
- Example 4 The operations and tests of Example 4 are repeated, but in the powder installation, between the cooler and the rewinder, an adhesive film is continuously deposited on the coated side low density polyethylene 50 microns thick. We get the same results as in example 4.
- Example 6 The operations and tests of Example 6 are repeated, but starting this time with a coil of pre-patinated zinc. The same results are obtained as in Example 4.
- Example 3 The operations of Example 3 are repeated, but this time using the coated zinc coil of example 4. We arrive at the same result as in example 3.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
- Glass Compositions (AREA)
- Non-Insulated Conductors (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
- Primary Cells (AREA)
- Arc Welding In General (AREA)
- Electroplating Methods And Accessories (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Electroplating And Plating Baths Therefor (AREA)
- Coating With Molten Metal (AREA)
- Physical Vapour Deposition (AREA)
- Building Environments (AREA)
Abstract
Description
La présente invention se rapporte à une toiture comportant un support de couverture sur lequel une couverture est posée, la couverture comprenant un assemblage de feuilles en zinc ou en acier galvanisé ayant une face tournée vers ledit support, ladite face étant munie d'un revêtement organique.The present invention relates to a roof comprising a covering support on which a cover is laid, the cover comprising an assembly of sheets of zinc or galvanized steel having one side facing said support, said side being provided with a organic coating.
Les couvertures en zinc sont traditionnellement posées sur des supports en sapin ventilés. A cause du coût élevé de ce support traditionnel, on cherche à le remplacer par des supports moins chers, notamment des supports non-ventilés éventuellement non-compatibles avec le zinc ou l'acier galvanisé tels que les panneaux de particules, le contre-plaqué, le béton et les isolants rigides. Cependant, de nombreux phénomènes de corrosion de couvertures de zinc posées sur ces supports non-ventilés ont été signalés. Pour résoudre ces problèmes il serait nécessaire, d'après le document EP-B-0410822, d'améliorer la ventilation entre le support de couverture et les plaques de zinc pour éviter les condensations et d'isoler le zinc du support non- ventilé, notamment si le support est en béton. C'est pourquoi ce document propose de fixer directement sur le support non ventilé des plaques intermédiaires en matière plastique présentant à leur face supérieure des aspérités en forme de plots tronconiques et d'attacher les feuilles de zinc à des pièces de support posées sur ces plaques intermédiaires et fixées au support, l'écartement produit par les aspérités entre les plaques intermédiaires et les feuilles de zinc créant un espace de ventilation sous les feuilles de zinc. Cette technique s'est avérée très utile pour résoudre les problèmes de corrosion, mais elle présente néanmoins l'inconvénient d'être relativement onéreuse.Zinc covers are traditionally placed on ventilated fir supports. AT because of the high cost of this traditional support, we are looking to replace it with supports cheaper, in particular non-ventilated supports possibly not compatible with the zinc or galvanized steel such as particle board, plywood, concrete and rigid insulation. However, many corrosion phenomena of zinc coverings have been reported on these non-ventilated supports. To solve these problems it would be necessary, according to document EP-B-0410822, to improve the ventilation between the support of cover and zinc plates to avoid condensation and to isolate the zinc from the support non-ventilated, especially if the support is made of concrete. This is why this document proposes to fix directly on the non-ventilated support of the plastic intermediate plates having on their upper face asperities in the form of frustoconical studs and attaching the sheets of zinc to support pieces placed on these intermediate plates and fixed to the support, the spacing produced by the roughness between the intermediate plates and the sheets of zinc creating a ventilation space under the zinc sheets. This technique has proven to be very useful for solving corrosion problems, but it has the disadvantage nonetheless to be relatively expensive.
Le but de la présente invention est de fournir une couverture telle que définie ci-dessus, qui évite les inconvénients mentionnés ci-dessus.The object of the present invention is to provide a blanket as defined above, which avoids the disadvantages mentioned above.
A cet effet, selon l'invention, ledit support est non-ventilé et ledit revêtement possède une épaisseur de 50 à 150 micromètres, est élastique, durable et étanche à la vapeur d'eau, l'autre face des feuilles étant soit non-revêtue soit revêtue par tout procédé de traitement de surface appliqué dans un but purement esthétique.To this end, according to the invention, said support is non-ventilated and said covering has a thickness of 50 to 150 micrometers, is elastic, durable and waterproof to water vapor, the other side of the sheets being either uncoated or coated by any surface treatment process applied for purely aesthetic purposes.
En effet, des essais de corrosion et de vieillissement accélérés, effectués sur des feuilles de
zinc, dont une face était munie du revêtement susdit, et simulant les contraintes que doit subir
sur une très longue période la face inférieure d'une couverture de zinc posée directement sur un
support non-ventilé ont démontré que la couverture selon l'invention doit être particulièrement
résistante à la corrosion, même si elle est posée directement sur un support non-ventilé.
Pour garantir la constance de la qualité du revêtement, il est hautement recommandable que
celui-ci soit appliqué en continu, notamment entre un poste de débobinage et un poste de
bobinage, chez le producteur de feuilles de zinc ou dans un atelier spécialisé dans l'application
de revêtements; l'élasticité du revêtement doit donc être telle que la feuille revêtue puisse subir,
sur le chantier ou dans l'atelier du couvreur-zingueur, les opérations de façonnage nécessaires
à sa pose sans que le revêtement ne s'abíme.
Il est évident que le revêtement doit être suffisamment dur pour que les diverses manipulations,
que la feuille revêtue doit subir jusqu'au moment où elle se trouve définitivement posée sur le
support, ne laissent pas de traces dans le revêtement ou en tous cas pas de traces profondes.
L'épaisseur d'au moins 50 micromètres est essentielle pour éviter à coup sûr que d'éventuelles
petites rayures subies à la suite des manipulations susdites ne puissent découvrir le zinc.
En prenant de l'âge, le revêtement ne peut ni se craqueler ni s'écailler, car il est essentiel qu'il
reste étanche à la vapeur d'eau. Il convient de signaler ici qu'il existe une synergie parfaite entre
la feuille de zinc et son revêtement dans ce sens qu'ils se protègent l'un l'autre contre le pire de
leurs ennemis respectifs, à savoir le rayonnement ultraviolet dans le cas du revêtement et les
condensations dans le cas du zinc ou de l'acier galvanisé.In fact, accelerated corrosion and aging tests carried out on zinc sheets, one side of which was provided with the above-mentioned coating, and simulating the stresses which the underside of a zinc covering laid must undergo over a very long period directly on a non-ventilated support have demonstrated that the cover according to the invention must be particularly resistant to corrosion, even if it is placed directly on a non-ventilated support. To guarantee the consistency of the coating quality, it is highly recommended that it be applied continuously, in particular between a unwinding station and a winding station, at the zinc sheet producer or in a workshop specializing in application of coatings; the elasticity of the coating must therefore be such that the coated sheet can undergo, on the site or in the workshop of the roofer-zinc-worker, the shaping operations necessary for its installation without the coating being damaged.
It is obvious that the coating must be hard enough so that the various manipulations, that the coated sheet must undergo until it is finally placed on the support, do not leave traces in the coating or in any case not deep traces. The thickness of at least 50 micrometers is essential to avoid for sure that possible small scratches undergone as a result of the above manipulations can not discover zinc.
As we age, the coating cannot crack or flake, as it is essential that it remains waterproof to water vapor. It should be noted here that there is a perfect synergy between the zinc sheet and its coating in the sense that they protect each other against the worst of their respective enemies, namely ultraviolet radiation in the case coating and condensation in the case of zinc or galvanized steel.
Il convient ici de signaler deux documents où sont décrits des matériaux mettant en jeu métal et matières synthétiques, ceci dans le cadre de recouvrements extérieurs de bâtiments.Two documents should be mentioned here where materials involving metal and synthetic materials, this in the context of exterior coverings of buildings.
Le document DE-A-3444669 décrit des bandes de revêtement en matière synthétique d'une épaisseur d'environ 5 mm, protégées par un film métallique d'environ 0.05 mm sur la face extérieure. Le film métallique protège la matière synthétique des influences atmosphériques et joue également un rôle esthétique. Le document préconise une matière synthétique souple et mousseuse telle que le polyéthylène ou le polyuréthanne expansé pour promouvoir l'isolation thermique et sonique; le film métallique peut être du cuivre, de l'acier inoxydable ou des alliages a base d'aluminium. Ce document n'aborde pas la question de la ventilation du support de toiture.Document DE-A-3444669 describes strips of plastic covering of a thickness of about 5 mm, protected by a metallic film of about 0.05 mm on the face outside. The metallic film protects the synthetic material from atmospheric influences and also plays an aesthetic role. The document recommends a flexible synthetic material and foamy such as polyethylene or expanded polyurethane to promote insulation thermal and sonic; the metallic film can be copper, stainless steel or alloys based on aluminum. This document does not address the issue of ventilation of the media. roofing.
Le document FR-A-2471859 quant à lui, décrit une feuille métallique à revêtement composite pour utilisation dans la production de matériaux extérieurs de construction. Cette feuille métallique porte un revêtement d'une composition renfermant une résine de chlorure de polyvinyle, un métal en poudre, un plastifiant et un agent stabilisant, ce produit ayant une excellente résistance aux facteurs atmosphériques, comme cela ressort d'un essai de vieillissement accéléré intitulé "Sunshine Weather Meter Test". Selon ce même document, des feuilles galvanisées recouvertes soit d'une couche de peinture à base d'une résine thermodurcissable, soit d'une pellicule de chlorure de polyvinyle et/ou de polyacrylate ne conviennent pas toujours du point de vue économique et en ce qui conceme leur résistance pour la production de matériaux extérieurs de construction.Document FR-A-2471859 describes a metal sheet with composite coating for use in the production of exterior building materials. This sheet metal carries a coating of a composition containing a chloride resin polyvinyl, a powdered metal, a plasticizer and a stabilizing agent, this product having a excellent resistance to atmospheric factors, as shown by a test of accelerated aging entitled "Sunshine Weather Meter Test". According to the same document, galvanized sheets covered with either a layer of resin-based paint thermosetting, either a polyvinyl chloride film and / or polyacrylate do not not always suitable from an economic point of view and as regards their resistance for the production of exterior building materials.
Selon l'invention, le revêtement peut être constitué d'une couche de peinture à base de polyester (symbole normalisé: SP), polyester silicone (SPSI), polyester polyamide (SPPA), époxy (EP), polyuréthanne (PUR), polyfluorure de vinylidène (PVDF) organosol de chlorure de vinyle (PVCO), plastisol de chlorure de vinyle (PVCP), acrylique (AY) ou acrylique silicone (AYS), l'épaisseur de la couche à l'état sec étant avantageusement de 50 à 70 micromètres. La peinture est avantageusement effectuée en continu chez le producteur de feuilles ou dans un atelier de peinture par dépôt de la peinture à l'état liquide ou sous forme de poudre et cuisson subséquente par passage dans un four. La préférence est donnée à une peinture polyester déposée sous forme de poudre. Une telle peinture est commercialisée sous le nom "Beckryspeed®"par la firme BICHON S.A.According to the invention, the coating may consist of a layer of paint based on polyester (standard symbol: SP), silicone polyester (SPSI), polyester polyamide (SPPA), epoxy (EP), polyurethane (PUR), polyvinylidene fluoride (PVDF) organosol chloride vinyl (PVCO), vinyl chloride plastisol (PVCP), acrylic (AY) or silicone acrylic (AYS), the thickness of the layer in the dry state being advantageously from 50 to 70 micrometers. The painting is advantageously carried out continuously at the sheet producer or in a painting workshop by depositing the paint in liquid or powder form and baking subsequent by passage through an oven. Preference is given to polyester paint deposited in powder form. Such a paint is marketed under the name "Beckryspeed®" by the firm BICHON S.A.
Le revêtement peut également être constitué d'un film adhésif de polychlorure de vinyle (PVCF), polyfluorure de vinyle (PVFF), acrylique (PMMAF), polyéthylène (PEF), polyuréthanne ou polyester, l'épaisseur du film étant avantageusement de 80 à 150 micromètres. L'application du film est avantageusement effectuée en continu par le producteur de feuilles. La préférence est accordée au film polyéthylène. Un exemple d'un tel film est le film adhésif en polyéthylène basse densité d'une épaisseur de 100 micromètres, qui est commercialisé sous la référence 4118 par la firme NOVACEL S.A. Pour des raisons économiques le revêtement par film adhésif est à préférer au revêtement par peinture.The coating can also consist of an adhesive film of polyvinyl chloride (PVCF), polyvinyl fluoride (PVFF), acrylic (PMMAF), polyethylene (PEF), polyurethane or polyester, the thickness of the film advantageously being from 80 to 150 micrometers. The application of film is advantageously carried out continuously by the sheet producer. Preference is granted to polyethylene film. An example of such a film is the low polyethylene adhesive film. density with a thickness of 100 micrometers, which is sold under the reference 4118 by NOVACEL S.A. for economic reasons, adhesive film coating is prefer to paint coating.
Le revêtement peut être constitué en outre d'une couche de peinture telle que définie ci-dessus, qui est recouverte elle-même d'un film adhésif tel que défini ci-dessus. Inutile de dire qu'un tel revêtement est encore plus performant que le revêtement par peinture ou par film adhésif.The coating can also consist of a layer of paint as defined above, which is itself covered with an adhesive film as defined above. Needless to say, such coating is even more effective than coating with paint or adhesive film.
Comme déjà mentionné plus haut, l'autre face de la feuille est soit non-revêtue soit revêtue par tout procédé de traitement de surface appliqué dans un but purement esthétique. C'est ainsi par exemple que cette face peut être prépatinée.As already mentioned above, the other side of the sheet is either uncoated or coated with any surface treatment process applied for purely aesthetic purposes. This is how example that this face can be prepatinated.
La présente invention se rapporte également à l'utilisation de feuilles de zinc ou d'acier galvanisé, dont une face est munie d'un revêtement tel que défini et décrit ci-dessus et dont l'autre face est soit non-revêtue soit revêtue dans un but purement esthétique, pour la réalisation de la couverture selon l'invention, cette réalisation comportant les opérations de façonnage des feuilles nécessaires à leur pose et la pose proprement dite des feuilles façonnées. Le façonnage et la pose des feuilles revêtues, fournies par le producteur de feuilles, peuvent se faire suivant la pratique courante. Lorsqu'il s'agit par exemple de réaliser une couverture à tasseaux ou une couverture à joints debout sur un support en béton ou en panneaux de particules, on peut utiliser les techniques décrites dans "Les techniques de l'Ingénieur, C1040, 1-14 et C1041, 1-5, pour poser de telles couvertures sur un support en bois, si ce n'est qu'on fixera les tasseaux ou les attaches au support par vissage au lieu de par clouage. The present invention also relates to the use of zinc or steel sheets galvanized, one side of which is provided with a coating as defined and described above and of which the other side is either uncoated or coated for purely aesthetic purposes, for the realization of the cover according to the invention, this embodiment comprising the operations of shaping the sheets necessary for their laying and the laying proper of the shaped sheets. The shaping and laying of coated sheets, supplied by the sheet producer, can be do according to current practice. When, for example, it involves providing a battens or a standing seam covering on a concrete or panel support particles, we can use the techniques described in "Engineering techniques, C1040, 1-14 and C1041, 1-5, to put such blankets on a wooden support, except that will fix the cleats or the fasteners to the support by screwing instead of by nailing.
Après les opérations de laminage, une bobine de zinc laminé est déroulée sur une ligne de parachèvement en même temps qu'un rouleau de film plastique de même largeur qui comporte une face recouverte d'adhésif.After the rolling operations, a roll of rolled zinc is unwound on a line of finishing together with a roll of plastic film of the same width which includes one side covered with adhesive.
Après déroulement, le film est plaqué sur le zinc laminé au moyen d'un ensemble de rouleaux presseurs et l'ensemble est réenroulé en bobine. Cette bobine sera ensuite découpée en largeur et longueur adéquates pour l'utilisation sur chantiers.After unwinding, the film is plated on the rolled zinc by means of a set of rollers pressers and the whole is rewound into a reel. This coil will then be cut into width and length suitable for use on construction sites.
L'épaisseur du zinc est celle couramment utilisée pour les couvertures soit entre 0,65 et 1 mm. Le film plastique est en polyéthylène basse densité de 100 micromètres d'épaisseur. L'adhésif est un mélange de caoutchouc et de résine de 10 micromètres d'épaisseur.The thickness of zinc is that commonly used for roofing, between 0.65 and 1 mm. The plastic film is made of low density polyethylene 100 micrometers thick. The adhesive is a mixture of rubber and resin 10 micrometers thick.
Les essais suivants confirment le bonne tenue du revêtement à la température et la bonne protection du zinc contre la corrosion par condensation de vapeur d'eau.The following tests confirm the good resistance of the coating to the temperature and the good protection of zinc against corrosion by condensation of water vapor.
Des échantillons de zinc revêtus du film ont été placés en étuve soit à 100 °C pendant 6 mois, soit à 70 °C pendant 8 mois, soit à 40 °C pendant 15 mois, durées qui correspondent à plus de 10 ans d'exposition en site réel sur une couverture.Zinc samples coated with the film were placed in an oven, at 100 ° C. for 6 months, either at 70 ° C for 8 months, or at 40 ° C for 15 months, durations which correspond to more than 10 years of real site exposure on a cover.
A la sortie de l'étuve on constate que le film est resté bien adhérant sur le laminé. Les échantillons subissent alors un essai de corrosion accéléré, dit essai Kestemich selon la norme DIN 50017, comportant un cycle par jour consistant à faire déposer par condensation de la vapeur d'eau puis à laisser sécher l'échantillon. Après 20 jours (20 cycles) on enlève le film plastique et on constate que la face protégée par le film n'est pas corrodée. L'autre face est excessivement corrodée par la condensation, par formation d'oxyde de zinc, appelé rouille blanche.At the exit of the oven, it can be seen that the film has remained well adhered to the laminate. The samples then undergo an accelerated corrosion test, says Kestemich test according to the standard DIN 50017, comprising a cycle per day consisting in depositing by condensation of the water vapor and then allow the sample to dry. After 20 days (20 cycles) the film is removed plastic and we see that the side protected by the film is not corroded. The other side is excessively corroded by condensation, by the formation of zinc oxide, called rust white.
Des échantillons de zinc revêtus du film on été placés en étuve pendant 60 jours soit à 90 °C, soit à 100 °C. Au préalable on a effectué des plis et des emboutis sur les échantillons pour simuler les déformations que le produit subira sur un chantier.Zinc samples coated with the film were placed in an oven for 60 days, ie at 90 ° C. either at 100 ° C. Beforehand we made folds and stampings on the samples to simulate the deformations that the product will undergo on a site.
Après passage en étuve, les échantillons ont subi 15 jours (15 cycles) un essai Kestemich. Après cela, on constate que le film est resté bien adhérent et après enlèvement du film la face protégée n'est pas corrodée alors que l'autre face l'est excessivement.After passing through an oven, the samples underwent a Kestemich test for 15 days (15 cycles). After that, we see that the film remained well adherent and after removal of the film the face protected is not corroded while the other side is excessively corroded.
Des échantillons de zinc revêtus du film ont subi des cycles de température de -20 °C à + 90 °C pour simuler de façon accélérée ce qui se passe en réalité sur une couverture. Après 300 cycles (1400 heures) on constate que le film est resté bien adhérant. Après 5 jours d'essai Kestemich (5 cycles) on constate après enlèvement du film que la face protégée n'est pas corrodée alors que l'autre l'est excessivement.Film coated zinc samples underwent temperature cycles from -20 ° C to + 90 ° C to simulate in real time what is actually happening on a blanket. After 300 cycles (1400 hours) it can be seen that the film has remained well adhered. After 5 days of Kestemich trial (5 cycles) it is noted after removal of the film that the protected face is not corroded then that the other is excessively.
Après laminage, une bobine de zinc est soumise à une opération de traitement de surface par conversion, donnant sur les deux faces une couche superficielle de phosphate de zinc, soit de couleur gris clair, soit de couleur gris foncé, le zinc ainsi obtenu étant appelé zinc prépatiné. Le zinc prépatiné est réenroulé en bobine. After rolling, a zinc coil is subjected to a surface treatment operation by conversion, giving on both sides a surface layer of zinc phosphate, i.e. light gray in color, or dark gray in color, the zinc thus obtained being called prepatinated zinc. The pre-patinated zinc is rewound into a coil.
La bobine de zinc prépatiné subit les mêmes opérations que la bobine de zinc laminé dans l'exemple 1 et le matériau ainsi obtenu est soumis aux mêmes essais que le matériau obtenu dans l'exemple 1: on obtient les mêmes résultats que dans l'exemple 1.The pre-weathered zinc coil undergoes the same operations as the rolled zinc coil in Example 1 and the material thus obtained is subjected to the same tests as the material obtained in example 1: the same results are obtained as in example 1.
La bobine de zinc revêtu de l'exemple 1 a été utilisée pour réaliser une couverture au dessus d'un local dans lequel on a produit de la vapeur d'eau.The zinc coil coated with example 1 was used to make a cover above a room in which water vapor has been produced.
L'intérieur du local est maintenu à 30 °C avec une humidité relative de 100 % et ses murs sont isolés thermiquement de façon que l'humidité se condense préférentiellement sur la face inférieure du zinc laminé protégé par le film.The interior of the room is maintained at 30 ° C with a relative humidity of 100% and its walls are thermally insulated so that moisture condenses preferentially on the face rolled zinc protected by the film.
Ces conditions sont choisies pour accélérer considérablement les phénomènes de condensation sous la couverture que l'on obtient habituellement.These conditions are chosen to considerably accelerate the phenomena of condensation under the cover that is usually obtained.
Après une année d'exposition dans ces conditions, on examine la face interne de la couverture et on constate qu'elle n'a pas été du tout corrodée.After one year of exposure under these conditions, we examine the inside of the cover and we see that it has not been corroded at all.
Après les opérations de laminage, on déroule une bobine de zinc laminé à une vitesse de 5m/min sur une installation de laquage comprenant un poste de préparation de la surface (dégraissage, conversion chimique, rinçage, séchage), une cabine de poudrage avec des pistolets à poudre permettant de déposer sur une face du zinc laminé une couche de plus de 50 micromètres de poudre, un four de polymérisation à 250 °C, un refroidisseur et un réenrouleur. Cette bobine sera ensuite découpée en largeur et longueur adéquates pour l'utilisation sur chantiers.After the rolling operations, a roll of rolled zinc is unwound at a speed of 5m / min on a lacquering installation including a surface preparation station (degreasing, chemical conversion, rinsing, drying), a powder coating booth with powder guns for depositing on a face of rolled zinc a layer of more than 50 micrometers of powder, a polymerization oven at 250 ° C, a cooler and a rewinder. This coil will then be cut into width and length suitable for use on construction sites.
L'épaisseur du zinc laminé est celle couramment utilisée pour les couvertures, soit entre 0,65 et 1 mm. La poudre est une poudre polyester "Beckryspeed®" fabriquée spécialement pour allier les performances et les avantages de la poudre à la technologie de l'application en continu. Les essais suivants confirment la bonne tenue du revêtement. Ils ont été effectués sur des éprouvettes planes avec un revêtement de 60 micromètres, comportant un embouti Erichsen selon la norme ISO 1520, un embouti par choc selon la norme ISO 6272, et un pli OT sur un coté.The thickness of rolled zinc is that commonly used for roofing, between 0.65 and 1 mm. The powder is a "Beckryspeed®" polyester powder specially made to combine the performance and benefits of powder to continuous application technology. The following tests confirm the good performance of the coating. They were carried out on flat test pieces with a coating of 60 micrometers, including an Erichsen stamping according to ISO 1520, an impact stamping according to ISO 6272, and an OT fold on a side.
Les éprouvettes on subi l'essai de corrosion accéléré au brouillard salin selon la norme NFX 41002 pendant 1000 heures. Après l'essai on constate que l'aspect du revêtement n'a pas été modifié, même sur les zones déformées, alors que la face non protégée a été excessivement corrodée.The test pieces underwent the accelerated salt spray corrosion test according to the NFX standard. 41002 for 1000 hours. After the test, it is found that the appearance of the coating has not been modified, even on deformed areas, when the unprotected side has been excessively corroded.
Les éprouvettes ont subi l'essai Kestemich, selon la norme DIN 50017 pendant 1000 heures (42 cycles). Après l'essai on constate que l'aspect du revêtement n'a pas été modifié, même sur les zones déformées, alors que la face non protégée a été uniformément corrodée par la condensation, par formation de rouille blanche. The test pieces underwent the Kestemich test, according to DIN 50017 for 1000 hours (42 cycles). After the test, it can be seen that the appearance of the coating has not been changed, even on the deformed areas, while the unprotected face has been uniformly corroded by the condensation, by the formation of white rust.
On répète les opérations et les essais de l'exemple 4, mais en partant cette fois-ci avec une bobine de zinc prépatiné et on obtient les mêmes résultats que dans l'exemple 4.The operations and tests of Example 4 are repeated, but starting this time with a coil of pre-patinated zinc and the same results are obtained as in Example 4.
On répète les opérations et les essais de l'exemple 4, mais dans l'installation de poudrage, entre le refroidisseur et le réenrouleur, on dépose en continu sur la face revêtue, un film adhésif de polyéthylène basse densité de 50 micromètres d'épaisseur. On obtient les mêmes résultats que dans l'exemple 4.The operations and tests of Example 4 are repeated, but in the powder installation, between the cooler and the rewinder, an adhesive film is continuously deposited on the coated side low density polyethylene 50 microns thick. We get the same results as in example 4.
On répète les opérations et les essais de l'exemple 6, mais en partant cette fois-ci avec une bobine de zinc prépatiné. On obtient les mêmes résultats que dans l'exemple 4.The operations and tests of Example 6 are repeated, but starting this time with a coil of pre-patinated zinc. The same results are obtained as in Example 4.
On répète les opérations de l'exemple 3, mais en utilisant cette fois-ci la bobine de zinc revêtue de l'exemple 4. On arrive au même résultat que dans l'exemple 3.The operations of Example 3 are repeated, but this time using the coated zinc coil of example 4. We arrive at the same result as in example 3.
Claims (19)
- Roofing including a covering support on which a covering is placed, the covering comprising an assembly of sheets made of zinc or of galvanized steel having one face turned towards the said support, the said face being provided with an organic coating, characterized in that the said support is not ventilated and in that the said coating is from 50 to 150 micrometres in thickness, that it is elastic, durable and leaktight to water vapour, the other face either not being coated or being coated by any process of surface treatment applied for purely aesthetic purposes.
- Roofing according to Claim 1, characterized in that the coating consists of a paint based on polyester, polyester silicone, polyester polyamide, epoxy, polyurethane, polyvinylidene fluoride, vinyl chloride organosol, vinyl chloride plastisol, acrylic or acrylic silicone.
- Roofing according to Claim 2, characterized in that the coating is from 50 to 70 micrometres in thickness.
- Roofing according to Claim 2 or 3, characterized in that the coating consists of a polyester paint applied in powder form.
- Roofing according to Claim 1, characterized in that the coating consists of an adhesive film of polyvinyl chloride, polyvinyl fluoride, acrylic, polyethylene, polyurethane or polyester.
- Roofing according to Claim 5, characterized in that the film is from 80 to 150 micrometres in thickness.
- Roofing according to Claim 5 or 6, characterized in that the adhesive film consists of low density polyethylene.
- Roofing according to Claim 1, characterized in that the coating consists of a layer of paint which is itself coated with an adhesive film, the paint being based on polyester, polyester silicone, polyester polyamide, epoxy, polyurethane, polyvinylidene fluoride, vinyl chloride organosol, vinyl chloride plastisol, acrylic or acrylic silicone and the layer of paint preferably being from 50 to 70 micrometres in thickness, and the adhesive film covering the paint being a film of polyvinyl chloride, polyvinyl fluoride, acrylic, polyethylene, polyurethane or polyester, preferably from 80 to 150 micrometres in thickness.
- Roofing according to Claim 8, characterized in that the paint is a polyester paint applied in powder form and the adhesive film consists of low density polyethylene.
- Roofing according to any one of Claims 1-9, characterized in that the said other face is prepatinized.
- Use of sheets of zinc or of galvanized steel, one face being provided with an organic coating which is from 50 to 150 micrometres in thickness, elastic, durable and leaktight to water vapour, the other face either not being coated or being coated by any process of surface treatment applied for purely aesthetic purposes, in order to produce the roofing according to one of Claims 1 to 10.
- Use according to Claim 11, characterized in that the organic coating consists of a paint based on polyester, polyester silicone, polyester polyamide, epoxy, polyurethane, polyvinylidene fluoride, vinyl chloride organosol, vinyl chloride plastisol, acrylic or acrylic silicone.
- Use according to Claim 12, characterized in that the coating is from 50 to 70 micrometres in thickness.
- Use according to Claim 12 or 13, characterized in that the coating consists of a polyester paint applied in powder form.
- Use according to Claim 11, characterized in that the organic coating consists of an adhesive film of polyvinyl chloride, polyvinyl fluoride, acrylic, polyethylene, polyurethane or polyester.
- Use according to Claim 15, characterized in that the film is from 80 to 150 micrometres in thickness.
- Use according to Claim 11, characterized in that the organic coating consists of a layer of paint which is itself coated with an adhesive film, the paint being based on polyester, polyester silicone, polyester polyamide, epoxy, polyurethane, polyvinylidene fluoride, vinyl chloride organosol, vinyl chloride plastisol, acrylic or acrylic silicone and the layer of paint preferably being from 50 to 70 micrometres in thickness, and the adhesive film covering the paint being a film of polyvinyl chloride, polyvinyl fluoride, acrylic, polyethylene, polyurethane or polyester, preferably from 80 to 150 micrometres in thickness.
- Use according to Claim 17, characterized in that the paint is a polyester paint applied in powder form and the adhesive film consists of low density polyethylene.
- Use according to any one of Claims 11-18, characterized in that the said other face is prepatinized.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9415568 | 1994-12-23 | ||
FR9415568A FR2728604A1 (en) | 1994-12-23 | 1994-12-23 | ZINC COVER FOR ROOF |
PCT/EP1995/004886 WO1996020320A1 (en) | 1994-12-23 | 1995-12-07 | Zinc roof covering |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0804659A1 EP0804659A1 (en) | 1997-11-05 |
EP0804659B1 true EP0804659B1 (en) | 1999-03-17 |
Family
ID=9470183
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95942113A Expired - Lifetime EP0804659B1 (en) | 1994-12-23 | 1995-12-07 | Zinc roof covering |
Country Status (17)
Country | Link |
---|---|
EP (1) | EP0804659B1 (en) |
JP (1) | JP3803778B2 (en) |
CN (1) | CN1079476C (en) |
AT (1) | ATE177810T1 (en) |
AU (1) | AU4343096A (en) |
CZ (1) | CZ287617B6 (en) |
DE (1) | DE69508437T2 (en) |
DK (1) | DK0804659T3 (en) |
ES (1) | ES2133178T3 (en) |
FR (1) | FR2728604A1 (en) |
GR (1) | GR3030503T3 (en) |
HK (1) | HK1008232A1 (en) |
HU (1) | HU220542B1 (en) |
NO (1) | NO310118B1 (en) |
PL (1) | PL320788A1 (en) |
SK (1) | SK284822B6 (en) |
WO (1) | WO1996020320A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU7643200A (en) * | 1999-09-02 | 2001-04-10 | Nanogate Gmbh | A roofing material exposed to weather hazards, especially roof tile or other smooth or porous and/or microstructured roofing materials |
EP1460196A1 (en) * | 2003-03-21 | 2004-09-22 | Icopal A/S | A metal roofing element |
CN102409810A (en) * | 2011-12-07 | 2012-04-11 | 常熟市东涛金属复合材料有限公司 | Composite metal tile |
ES2544006B2 (en) * | 2015-03-31 | 2016-01-12 | Asturiana De Laminados, S.A. | Laminated products based on zinc and their use |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH634120A5 (en) * | 1979-03-01 | 1983-01-14 | Neomat Ag | Process for surface coating a roof snow guard |
GB2065155B (en) * | 1979-12-17 | 1984-02-29 | Toyo Kohan Co Ltd | Coated or laminated metal sheet for use as a building material |
IT8123129V0 (en) * | 1981-10-06 | 1981-10-06 | Fiorio Guido | COVER ELEMENT FOR BUILDING ROOFS. |
DE3444669A1 (en) * | 1984-12-07 | 1986-06-12 | Karl 6920 Sinsheim Serwane | Covering for roofs, building facades inter alia |
FR2650319B1 (en) * | 1989-07-26 | 1991-11-08 | Vieille Montagne France Sa | METAL COVER FOR ROOF AND SUPPORTS FOR SUCH COVER |
DE4014711A1 (en) * | 1990-05-08 | 1990-11-29 | Gerhard Fabritz | Roofing elements to replace tiles - consist of long galvanised and coated steel units with pressed out centres and with S-section so that adjacent units interlock along edges |
-
1994
- 1994-12-23 FR FR9415568A patent/FR2728604A1/en active Granted
-
1995
- 1995-12-07 ES ES95942113T patent/ES2133178T3/en not_active Expired - Lifetime
- 1995-12-07 CZ CZ19971949A patent/CZ287617B6/en not_active IP Right Cessation
- 1995-12-07 DE DE69508437T patent/DE69508437T2/en not_active Expired - Lifetime
- 1995-12-07 WO PCT/EP1995/004886 patent/WO1996020320A1/en active IP Right Grant
- 1995-12-07 AT AT95942113T patent/ATE177810T1/en active
- 1995-12-07 HU HU9702105A patent/HU220542B1/en not_active IP Right Cessation
- 1995-12-07 CN CN95197622A patent/CN1079476C/en not_active Expired - Lifetime
- 1995-12-07 JP JP52015196A patent/JP3803778B2/en not_active Expired - Fee Related
- 1995-12-07 PL PL95320788A patent/PL320788A1/en unknown
- 1995-12-07 DK DK95942113T patent/DK0804659T3/en active
- 1995-12-07 SK SK822-97A patent/SK284822B6/en not_active IP Right Cessation
- 1995-12-07 AU AU43430/96A patent/AU4343096A/en not_active Abandoned
- 1995-12-07 EP EP95942113A patent/EP0804659B1/en not_active Expired - Lifetime
-
1997
- 1997-06-20 NO NO19972918A patent/NO310118B1/en not_active IP Right Cessation
-
1998
- 1998-07-16 HK HK98109207A patent/HK1008232A1/en not_active IP Right Cessation
-
1999
- 1999-06-10 GR GR990401578T patent/GR3030503T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
FR2728604A1 (en) | 1996-06-28 |
EP0804659A1 (en) | 1997-11-05 |
CN1079476C (en) | 2002-02-20 |
SK284822B6 (en) | 2005-12-01 |
CZ194997A3 (en) | 1997-11-12 |
DK0804659T3 (en) | 1999-10-11 |
JPH11503500A (en) | 1999-03-26 |
ES2133178T3 (en) | 1999-09-01 |
NO310118B1 (en) | 2001-05-21 |
DE69508437D1 (en) | 1999-04-22 |
ATE177810T1 (en) | 1999-04-15 |
GR3030503T3 (en) | 1999-10-29 |
NO972918D0 (en) | 1997-06-20 |
FR2728604B1 (en) | 1997-02-21 |
CN1175297A (en) | 1998-03-04 |
WO1996020320A1 (en) | 1996-07-04 |
NO972918L (en) | 1997-08-25 |
HUT77267A (en) | 1998-03-02 |
DE69508437T2 (en) | 1999-10-28 |
JP3803778B2 (en) | 2006-08-02 |
PL320788A1 (en) | 1997-10-27 |
SK82297A3 (en) | 1998-02-04 |
AU4343096A (en) | 1996-07-19 |
HK1008232A1 (en) | 1999-05-07 |
CZ287617B6 (en) | 2001-01-17 |
HU220542B1 (en) | 2002-03-28 |
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