EP0741215B1 - Polycarbonate panels, in particular panels used for roof covering - Google Patents
Polycarbonate panels, in particular panels used for roof covering Download PDFInfo
- Publication number
- EP0741215B1 EP0741215B1 EP96400656A EP96400656A EP0741215B1 EP 0741215 B1 EP0741215 B1 EP 0741215B1 EP 96400656 A EP96400656 A EP 96400656A EP 96400656 A EP96400656 A EP 96400656A EP 0741215 B1 EP0741215 B1 EP 0741215B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- panel
- sheet
- sheets
- blades
- spacers
- 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
Links
- 229920000515 polycarbonate Polymers 0.000 title claims description 12
- 239000004417 polycarbonate Substances 0.000 title claims description 12
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000005192 partition Methods 0.000 abstract description 2
- 125000006850 spacer group Chemical group 0.000 description 36
- 239000000543 intermediate Substances 0.000 description 10
- 238000009413 insulation Methods 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/54—Slab-like translucent elements
- E04C2/543—Hollow multi-walled panels with integrated webs
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
- E04C2/20—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of plastics
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
-
- 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
- E04D3/06—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 glass or other translucent material; Fixing means therefor
Definitions
- the present invention relates to an improvement to polycarbonate sheets obtained by extrusion and the profile usually has two parallel blades forming the two faces of the plate, these blades being joined in a periodic pattern, by spacers perpendicular to the blades and / or oblique.
- Such plates are especially intended to be used for make covers or partitions.
- the polycarbonate sheets of this kind presented two blades forming the upper faces, respectively lower of the plate, joined to regular interval, by perpendicular spacers with the blades delimiting, in the plates, alveoli of square or rectangular shape, extending longitudinally, i.e. in the direction extrusion, see for example DE-U-9 408 574.
- we have already planned to achieve such plates comprising, instead of spacers perpendicular to the blades, oblique spacers in zigzag.
- EP-A-0 530 545 describes such a structure.
- Polycarbonate sheets are also known to three blades, namely two extreme blades and one blade thinner middle, joined by spacers perpendicular.
- polycarbonate sheets due to their use, to be as transparent as possible and to present a relatively high thermal insulation coefficient. On the other side, these plates should be light, both for reasons of economy of matter and for reasons related to their uses.
- transparency decreases notably when the weight and complexity of the structure increases, while rigidity and inertia tend to grow with increasing weight and complexity of the structures, the mechanical properties of polycarbonates preventing, moreover, that one can transpose to the area of plates made in such material, shapes and structures that may exist in other materials.
- the invention proposes to provide an improvement to achieve these goals.
- Another object of the invention is to provide such a plate whose weight per m 2 , that is to say the grammage, is only slightly or not increased compared to traditional plates.
- the subject of the invention is a polycarbonate plate transparent obtained by extrusion and having, on its two external faces, two external blades joined by spacers extending perpendicular to said blades, according to a periodic pattern, and comprising spacers oblique, characterized in that it comprises, with at least one of said external blades, another blade, internal, which is parallel to it and separated by a distance small compared to the thickness of the plate, so that form, between said outer blade and said inner blade, a rectangular cell of low height, and, on the other side of said internal blade, a section volume rectangular or square, between said internal blades or between said inner blade and the second outer blade, divided in two by an oblique blade extending substantially along a diagonal of said rectangular or square volume.
- the plate according to the invention comprises at least three parallel blades. and preferably four blades parallel, as well as a succession of oblique spacers, extending between two opposite corners of the square volumes or internal rectangles, which provides a significantly stronger structure which is practically just as transparent as the plates already known, only the zones corresponding to the spacers perpendiculars with discontinuities of transparency. In addition the transmissibility coefficient thermal is decreased.
- distance By short distance is meant a distance which is at plus, equal to a third of the total thickness of the plate and preferably less than or equal to a quarter of said thickness.
- the thickness of the plate varies between 16 and 40 mm and the pitch of the patterns also varies between 16 and 40 mm.
- the grammage is then expected to vary approximately between 2.5 and 5 kg / mm 2 .
- the plate shown is made of polycarbonate, for example polycarbonate type 1143 FBL sold by the German company BAYER.
- each of the blades 1,2 extends, parallel to said blades, each time a blade 4.5 intermediate, each intermediate blade being regularly interspersed with spacers 3.
- these spacers 8 are arranged in a zigzag. The spacers 8 thus delimit triangular cells 9, 10.
- the oblique spacers 8 join alternately points which do not correspond exactly to the points for joining the blades 4, 5 and the spacers 3, in particular points slightly offset towards the center of the volume 9, 10 with respect to the aforementioned junction points.
- the thicknesses of the tops 4, 5 are less than the thickness of the blades 1 and 2.
- the thicknesses of the spacers 3 are preferably less than the thickness of the end blades, but greater than that of the blades 4, 5.
- the thickness of the spacers 8 can be reduced and intermediate between thicknesses of perpendicular spacers 3 and blades intermediates 4, or, preferably, equal to the thickness blades 4, 5.
- These thicknesses may preferably vary independently of one another, in proportions of around 25%.
- Rigidity and resistance to bending have been significantly increased, and this without increasing material.
- the interposition of the intermediate blades 4, 5 significantly increases the thermal insulation coefficient while, in addition, the cells 6, 7, 9, 10 have reduced sizes and in particular, for cells 6 and 7 a thin, which is also favorable for better thermal insulation.
- the gaze does not meets in the direction perpendicular to the plate, no additional node, the set of nodes bringing together the various constituent elements of the plate being always aligned with the spacers 3, so that the transparency is practically unchanged from the transparency of the plates of the prior art.
- a plate of the same grammage with three blades and perpendicular spacers of the same pitch has a thermal coefficient of 2.42 W / m2.K and a deformation of 150 mm and a plate of the same pitch and grammage with two blades and spacers perpendicular and oblique in a zig-zag, a thermal coefficient of 2.6 W / m 2 .K and a deformation of 61 mm.
- the transparency does not appear diminished.
- the plate has a structure similar to that of the Figure 1, it being understood however that only one blade intermediate 4 is present near the outer blade 1, so that the cells 9, 10 are delimited directly by the other external blade 2.
- This form of realization also presents, compared to art significant benefits, but it is not preferred, the embodiment of FIG. 1 being, for its part, even more advantageous.
- the thickness of the spacers 3 could be different depending on whether the spacer part is outside or between the intermediate blades 4, 5.
- the spacers 8 may not extend exactly as far in the corners of the intermediate cells but, join the spacers 3 at a certain distance from the blades intermediaries 4, 5.
- the thicknesses respective of the different constituents of the pattern can vary from each other depending in particular the ratio between the total thickness of the plates and the pitch of the pattern, and depending on the resistance sought.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Laminated Bodies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Roof Covering Using Slabs Or Stiff Sheets (AREA)
Abstract
Description
La présente invention a trait à un perfectionnement aux plaques en polycarbonate obtenues par extrusion et dont le profil comporte, généralement, deux lames parallèles formant les deux faces de la plaque, ces lames étant réunies selon un motif périodique, par des entretoises perpendiculaires aux lames et/ou obliques. De telles plaques sont notamment destinées à être utilisées pour réaliser des couvertures ou des cloisons.The present invention relates to an improvement to polycarbonate sheets obtained by extrusion and the profile usually has two parallel blades forming the two faces of the plate, these blades being joined in a periodic pattern, by spacers perpendicular to the blades and / or oblique. Such plates are especially intended to be used for make covers or partitions.
De façon classique, les plaques de polycarbonate de ce genre présentaient deux lames formant les faces supérieure, respectivement inférieure de la plaque, réunies à intervalle régulier, par des entretoises perpendiculaires aux lames délimitant, dans les plaques, des alvéoles de forme carrée ou rectangulaire, s'étendant longitudinalement, c'est-à-dire dans la direction d'extrusion, voir par example DE-U-9 408 574. Afin d'augmenter l'inertie, et par conséquent la résistance à la flexion, on a déjà prévu de réaliser de telles plaques comportant, au lieu d'entretoises perpendiculaires aux lames, des entretoises obliques en zigzag. On a également déjà combiné ces deux profils en prévoyant d'une part des entretoises perpendiculaires et, entre deux entretoises perpendiculaires, chaque fois une entretoise oblique, les différentes entretoises obliques ayant des directions alternées, en zigzag. EP-A-0 530 545 décrit une telle structure.Conventionally, the polycarbonate sheets of this kind presented two blades forming the upper faces, respectively lower of the plate, joined to regular interval, by perpendicular spacers with the blades delimiting, in the plates, alveoli of square or rectangular shape, extending longitudinally, i.e. in the direction extrusion, see for example DE-U-9 408 574. In order to increase the inertia, and consequently flexural strength, we have already planned to achieve such plates comprising, instead of spacers perpendicular to the blades, oblique spacers in zigzag. We have also already combined these two profiles in providing on the one hand perpendicular spacers and, between two perpendicular spacers, each time a oblique spacer, the different oblique spacers having alternate directions, zigzagging. EP-A-0 530 545 describes such a structure.
On connait également des plaques de polycarbonate à trois lames, à savoir deux lames extrêmes et une lame intermédiaire plus mince, réunies par des entretoises perpendiculaires.Polycarbonate sheets are also known to three blades, namely two extreme blades and one blade thinner middle, joined by spacers perpendicular.
Outre la résistance à la flexion, il est demandé aux plaques de polycarbonate, en raison de leur usage, d'être aussi transparentes que possible et de présenter un coefficient d'isolation thermique relativement élevé. D'un autre côté, ces plaques doivent être légères, à la fois pour des raisons d'économie de matière et pour des raisons liées à leurs utilisations. On comprend que ces différentes exigences sont contradictoires, la transparence diminuant notablement lorsque le poids et la complexité de la structure augmentent, alors que la rigidité et l'inertie tendent à croítre avec l'augmentation du poids et la complexité des structures, les propriétés mécaniques des polycarbonates empêchant, en outre, que l'on puisse transposer au domaine de plaques réalisées en un tel matériau, des formes et des structures pouvant exister dans le cadre d'autres matériaux.In addition to the flexural strength, polycarbonate sheets, due to their use, to be as transparent as possible and to present a relatively high thermal insulation coefficient. On the other side, these plates should be light, both for reasons of economy of matter and for reasons related to their uses. We understand that these different requirements are contradictory, transparency decreases notably when the weight and complexity of the structure increases, while rigidity and inertia tend to grow with increasing weight and complexity of the structures, the mechanical properties of polycarbonates preventing, moreover, that one can transpose to the area of plates made in such material, shapes and structures that may exist in other materials.
Or, il est hautement désirable d'améliorer de façon notable le coefficient d'iolation thermique des plaques de polycarbonate, et ceci sans diminuer de façon sensible leur transparence, et en maintenant, si possible, leur résistance, notamment la résistance à la flexion et l'inertie.Now, it is highly desirable to improve in a way notable the coefficient of thermal insulation of the plates of polycarbonate, and this without significantly reducing their transparency, and maintaining, if possible, their strength, including flexural strength and inertia.
L'invention se propose de fournir un perfectionnement permettant d'atteindre ces objectifs.The invention proposes to provide an improvement to achieve these goals.
Un autre objectif de l'invention est de fournir une telle plaque dont le poids au m2, c'est-à-dire le grammage, n'est que peu ou pas augmenté par rapport aux plaques traditionnelles.Another object of the invention is to provide such a plate whose weight per m 2 , that is to say the grammage, is only slightly or not increased compared to traditional plates.
L'invention a pour objet une plaque en polycarbonate transparent obtenue par extrusion et présentant, sur ses deux faces externes, deux lames externes réunies par des entretoises s'étendant perpendiculairement auxdites lames, selon un motif périodique, et comportant des entretoises obliques, caractérisée en ce qu'elle comporte, auprès de l'une au moins, desdites lames externes, une autre lame, interne, qui lui est parallèle et écartée d'une distance faible par rapport à l'épaisseur de la plaque, de façon à former, entre ladite lame externe et ladite lame interne, un alvéole rectangulaire de faible hauteur, et, de l'autre côté de ladite lame interne, un volume de section rectangulaire ou carrée, entre lesdites lames internes ou entre ladite lame interne et la seconde lame externe, divisé en deux par une lame oblique s'étendant sensiblement selon une diagonale dudit volume rectangulaire ou carré. The subject of the invention is a polycarbonate plate transparent obtained by extrusion and having, on its two external faces, two external blades joined by spacers extending perpendicular to said blades, according to a periodic pattern, and comprising spacers oblique, characterized in that it comprises, with at least one of said external blades, another blade, internal, which is parallel to it and separated by a distance small compared to the thickness of the plate, so that form, between said outer blade and said inner blade, a rectangular cell of low height, and, on the other side of said internal blade, a section volume rectangular or square, between said internal blades or between said inner blade and the second outer blade, divided in two by an oblique blade extending substantially along a diagonal of said rectangular or square volume.
Dans une forme de réalisation particulièrement préférée, il est prévu une telle lame interne pour chacune des deux lames externes, de sorte que le motif de la plaque comporte entre deux alvéoles rectangulaires de faible hauteur, ledit volume carré ou rectangulaire muni de son entretoise en diagonale.In a particularly embodiment preferred, there is provided such an internal blade for each of the two outer blades, so that the pattern of the plate between two rectangular cells of low height, said square or rectangular volume provided with its diagonal spacer.
Ainsi, la plaque selon l'invention comporte au moins trois lames parallèles. et de préférence quatre lames parallèles, ainsi qu'une succession d'entretoises obliques, s'étendant entre deux coins opposés des volumes carrés ou rectangulaires internes, ce qui permet d'obtenir une structure nettement plus solide et qui est pratiquement tout aussi transparente que les plaques déjà connues, seules les zones correspondant aux entretoises perpendiculaires présentant des discontinuités de transparence. De plus le coefficient de transmissibilité thermique est diminué.Thus, the plate according to the invention comprises at least three parallel blades. and preferably four blades parallel, as well as a succession of oblique spacers, extending between two opposite corners of the square volumes or internal rectangles, which provides a significantly stronger structure which is practically just as transparent as the plates already known, only the zones corresponding to the spacers perpendiculars with discontinuities of transparency. In addition the transmissibility coefficient thermal is decreased.
Par faible distance, on entend une distance qui est au plus, égale à un tiers de l'épaisseur totale de la plaque et, de préférence, inférieure ou égale à un quart de ladite épaisseur.By short distance is meant a distance which is at plus, equal to a third of the total thickness of the plate and preferably less than or equal to a quarter of said thickness.
Par s'étendant sensiblement selon une diagonale, on entend une lame oblique s'étendant selon la diagonale du volume de section rectangulaire ou carrée ou selon une ligne proche de la diagonale qui n'aboutit pas exactement aux points de jonction des lames internes et des entretoises perpendiculaires.By extending substantially along a diagonal, we hear an oblique blade extending along the diagonal the volume of rectangular or square section or according to a line close to the diagonal which does not end exactly at the junction points of the internal blades and spacers perpendicular.
On peut avantageusement donner aux lames intermédiaires une épaisseur très faible, du fait qu'elles se trouvent protégées par les lames externes alors qu'on diminue la longueur des entretoises obliques de sorte que l'on peut, grâce à l'invention, obtenir par rapport aux plaques classiques, une augmentation de la rigidité et de la résistance sans augmentation du grammage.We can advantageously give to the intermediate blades a very small thickness, because they are protected by external blades while reducing the length of the oblique struts so that we can, thanks to the invention, obtain with respect to the plates classic, increased rigidity and resistance without increasing the grammage.
De préférence, l'épaisseur de la plaque varie entre 16 et 40 mm et le pas des motifs varie également entre 16 et 40 mm. De façon avantageuse, le grammage est alors prévu pour varier environ entre 2,5 et 5 kg/mm2. Preferably, the thickness of the plate varies between 16 and 40 mm and the pitch of the patterns also varies between 16 and 40 mm. Advantageously, the grammage is then expected to vary approximately between 2.5 and 5 kg / mm 2 .
D'autres avantages et caractéristiques de l'invention apparaítront à la lecture de la description suivante, faite à titre d'exemple non limitatif, et se référant au dessin annexé, dans lequel :
- la figure 1 représente une vue en section d'un motif d'une plaque selon une première forme de réalisation de l'invention;
- La figure 2 représente une vue en section d'un motif d'une plaque selon une deuxième forme de réalisation de l'invention.
- Figure 1 shows a sectional view of a pattern of a plate according to a first embodiment of the invention;
- 2 shows a sectional view of a pattern of a plate according to a second embodiment of the invention.
On se réfère à la figure 1.We refer to figure 1.
La plaque représentée est réalisée en polycarbonate, par exemple polycarbonate de type 1143 FBL vendu par la société allemande BAYER.The plate shown is made of polycarbonate, for example polycarbonate type 1143 FBL sold by the German company BAYER.
Elle comporte deux lames externes 1,2 reliées à
intervalle régulier, déterminant le motif, par des
entretoises rectilignes 3.It has two
A une faible distance de chacune des lames 1,2,
s'étend, parallèlement auxdites lames, chaque fois une lame
intermédiaire 4,5, chaque lame intermédiaire étant
régulièrement entrecoupée par les entretoises 3.At a small distance from each of the
L'ensemble des lames 1, 2, 4, 5 et des entretoises
perpendiculaires 3, délimite, pour chaque motif, deux
alvéoles extrêmes rectangulaires de faible hauteur 6, 7 et
un volume géométriquement rectangulaire et de hauteur
importante s'étendant entre les deux lames internes 4, 5. A
l'intérieur de chaque volume, s'étend une entretoise
oblique 8, rejoignant alternativement les points de
jonction des lames 4, 5 et des entretoises 3. De préférence
ces entretoises 8 sont disposées en zigzag. Les entretoises
8 délimitent ainsi des alvéoles triangulaires 9, 10.All
Selon une variante de réalisation, on peut prévoir
que les entretoises obliques 8 rejoignent alternativement
des points qui ne correspondent pas exactement aux points
de jonction des lames 4, 5 et des entretoises 3, notamment
des points légèrement décalés vers le centre du
volume 9, 10 par rapport aux points de jonction précités. According to an alternative embodiment, provision can be made
that the
Comme on le voit, sur le dessin, les épaisseurs des
fanes 4, 5 sont inférieures aux épaisseurs des lames 1 et
2. Les épaisseurs des entretoises 3 sont de préférence
inférieures à l'épaisseur des lames extrêmes, mais
supérieures à celle des lames 4, 5. L'épaisseur des
entretoises 8 peut être réduite et intermédiaire entre les
épaisseurs des entretoises perpendiculaires 3 et des lames
intermédiaires 4, ou, de préférence, égale à l'épaisseur
des lames 4, 5.As can be seen in the drawing, the thicknesses of the
A titre d'exemple, pour une plaque selon la figure 1 ayant une épaisseur totale de 16 mm, un pas de 20 mm, et un grammage de 2,8 kg/m2, les épaisseurs des différents constituants sont les suivantes :
- Lames 1, 2 : 0,58 mm
- Entretoise 3 : 0,47 mm
- Lames intermédiaires 4, 5 : 0,25 mm
- Entretoise 8 : 0,25 mm
- Slides 1, 2: 0.58 mm
- Spacer 3: 0.47 mm
- Intermediate blades 4, 5: 0.25 mm
- Spacer 8: 0.25 mm
Ces épaisseurs peuvent, de préférence, varier indgpendamment les unes des autres, dans des proportions de l'ordre de 25 %.These thicknesses may preferably vary independently of one another, in proportions of around 25%.
Grâce à l'invention on a notablement amélioré les caractéristiques de la plaque de polycarbonate obtenue par extrusion, selon le motif décrit.Thanks to the invention, the characteristics of the polycarbonate sheet obtained by extrusion, according to the pattern described.
La rigidité et la résistance à la flexion ont été
considérablement augmentés, et ceci sans augmentation de
matière. L'interposition des lames intermédiaires 4, 5
augmente sensiblement le coefficient d'isolation thermique
alors que, de plus, les alvéoles 6, 7, 9, 10 présentent des
tailles réduites et notamment, pour les alvéoles 6 et 7 une
épaisseur faible, ce qui est également favorable à une
meilleure isolation thermique. Par ailleurs, lorsque l'on
contemple la plaque selon l'invention, le regard ne
rencontre dans la direction perpendiculaire à la plaque,
aucun noeud supplémentaire, l'ensemble de noeuds réunissant
les différents éléments constitutifs de la plaque étant
toujours alignés sur les entretoises 3, de sorte que la
transparence n'est pratiquement pas modifiée par rapport à
la transparence des plaques de l'art antérieur. Rigidity and resistance to bending have been
significantly increased, and this without increasing
material. The interposition of the
A titre d'exemple, une plaque similaire à celle décrite ci-dessus ayant une épaisseur de 16 mm, un pas de 25 mm et un grammage de 2,8 kg présente les caractéristiques suivantes :
- coefficient de transmissibilité thermique : 2,2 W/m2.K
- déformation (sous 900 N/m2) : 81 mm
- coefficient of thermal transmissibility: 2.2 W / m 2 .K
- deformation (under 900 N / m 2 ): 81 mm
Par comparaison, une plaque de même grammage à trois lames et à entretoises perpendiculaires de même pas présente un coefficient thermique de 2,42 W/m2.K et une déformation de 150 mm et une plaque de même pas et grammage à deux lames et entretoises perpendiculaires et obliques en zig-zag, un coefficient thermique de 2,6 W/m2.K et une déformation de 61 mm. La transparence n'apparaít pas diminuée.By comparison, a plate of the same grammage with three blades and perpendicular spacers of the same pitch has a thermal coefficient of 2.42 W / m2.K and a deformation of 150 mm and a plate of the same pitch and grammage with two blades and spacers perpendicular and oblique in a zig-zag, a thermal coefficient of 2.6 W / m 2 .K and a deformation of 61 mm. The transparency does not appear diminished.
On se réfère maintenant à la figure 2.We now refer to Figure 2.
Dans la forme de réalisation représentée sur la figure
2, la plaque possède une structure analogue à celle de la
figure 1, étant entendu cependant que seule une lame
intermédiaire 4 est présente à proximité de la lame externe
1, de sorte que les alvéoles 9, 10 sont délimités
directement par l'autre lame externe 2. Cette forme de
réalisation présente également, par rapport à l'art
antérieur, des avantages importants, mais elle n'est pas
préférée, la forme de réalisation de la figure 1 étant,
pour sa part, encore nettement plus avantageuse.In the embodiment shown in the figure
2, the plate has a structure similar to that of the
Figure 1, it being understood however that only one blade
intermediate 4 is present near the outer blade
1, so that the
On comprend que l'invention peut encore faire l'objet
de nombreuses variantes de détail. Ainsi, par exemple,
l'épaisseur des entretoises 3 pourrait être différente
suivant que la partie d' entretoise se trouve à l'extérieur
ou entre les lames intermédiaires 4, 5. De même les
entretoises 8 pourraient ne pas s'étendre exactement jusque
dans les coins des alvéoles intermédiaires mais, rejoindre
les entretoises 3 à une certaine distance des lames
intermédiaires 4, 5. Enfin, on comprend que les épaisseurs
respectives des différents constituants du motif peuvent
varier les unes par rapport aux autres en fonction
notamment du rapport entre l'épaisseur totale des plaques
et le pas du motif, et en fonction de la résistance
recherchée.We understand that the invention can still be the subject
many variations of detail. So, for example,
the thickness of the
Claims (5)
- Panel of transparent polycarbonate obtained by extrusion and having, on its two outer surfaces, two external sheets (1, 2) connected by cross-braces (3) extending perpendicularly to said sheets, in a periodic pattern, and comprising oblique cross-braces, said panel comprising, close to at least one of said outer sheets (1, 2) another, inner sheet (4, 5) which is parallel thereto and spaced at a short distance relative to the thickness of the panel and which is intersected by the cross-braces (3) so as to form, between said outer sheet (1, 2) and said inner sheet (4, 5), a rectangular cell (6, 7) of limited height, characterised in that it comprises, between said inner sheets (4, 5) or between said inner sheet (4) and the second outer sheet (2), a space (9, 10), of rectangular or square cross section, divided into two by an oblique sheet (8), extending substantially along a diagonal of said second space (9-10), the nodes which connect the oblique cross-braces (8) to the perpendicular cross-braces (3) thus being spaced from said at least one outer sheet (1, 2) arranged close to said other inner sheet (4, 5).
- Panel according to claim 1, characterised in that an inner sheet (4, 5) of this kind is provided for each of the two outer sheets (1, 2).
- Panel according to one of claims 1 and 2, characterised in that said short distance is at most equal to one third of the total thickness of the panel and preferably less than or equal to a quarter of said thickness.
- Panel according to one of claims 1 to 3, characterised in that the intermediate sheet or sheets (4, 5) is or are thin compared with the outer sheets (1, 2).
- Panel according to one of claims 1 to 4, characterised in that the thickness of the panel is between 16 and 40 mm, the weight per unit area being between about 2.5 and 5 kg/m2.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9503678 | 1995-03-29 | ||
| FR9503678A FR2732386B1 (en) | 1995-03-29 | 1995-03-29 | POLYCARBONATE PLATES, ESPECIALLY PLATES FOR COVERING |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0741215A1 EP0741215A1 (en) | 1996-11-06 |
| EP0741215B1 true EP0741215B1 (en) | 2002-06-12 |
Family
ID=9477539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96400656A Expired - Lifetime EP0741215B1 (en) | 1995-03-29 | 1996-03-27 | Polycarbonate panels, in particular panels used for roof covering |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0741215B1 (en) |
| AT (1) | ATE219197T1 (en) |
| DE (1) | DE69621698T2 (en) |
| DK (1) | DK0741215T3 (en) |
| ES (1) | ES2177742T3 (en) |
| FR (1) | FR2732386B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6931796B2 (en) | 2003-02-13 | 2005-08-23 | General Electric | Extruded transparent/translucent sheet for roof structures |
| US8568860B2 (en) | 2007-11-12 | 2013-10-29 | Sabic Innovative Plastics Ip B.V. | Multiwall polymer sheet comprising branched polycarbonate |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003085329A1 (en) * | 2002-04-10 | 2003-10-16 | Neil Christopher Hellmann | A solar panel structure |
| FR2843984B1 (en) | 2002-08-27 | 2004-11-05 | Kaysersberg Packaging Sa | PLATE + PROFILE SYSTEM MEETING NF STANDARD P08-301 |
| DE10304536B3 (en) * | 2003-02-04 | 2004-05-13 | Horst Hinterneder | Hollow chamber profile for utilizing solar energy, consists of a transparent upper section and a radiation absorbing lower section |
| GB0320572D0 (en) * | 2003-09-03 | 2003-10-01 | Ultraframe Uk Ltd | Glazing panels |
| FR2888594B1 (en) * | 2005-07-13 | 2007-10-26 | Kaysersberg Packaging Soc Par | ALVEOLAIRE PLATE MULTIPAROIS |
| US8074418B2 (en) | 2006-04-13 | 2011-12-13 | Sabic Innovations Plastics IP B.V. | Apparatus for connecting panels |
| WO2007141616A1 (en) * | 2006-06-06 | 2007-12-13 | Pieter Martin Henderson | Roof construction comprising elongate cover elements having longitudinal cavities |
| CN101878107A (en) * | 2007-09-27 | 2010-11-03 | 沙伯基础创新塑料知识产权有限公司 | Polymer sheeting |
| EP2220302B1 (en) * | 2007-10-01 | 2018-05-23 | SABIC Global Technologies B.V. | Apparatus for connecting panels |
| GB2464331A (en) * | 2008-07-03 | 2010-04-21 | David John Anderson | Glazing |
| US8889248B2 (en) | 2008-10-31 | 2014-11-18 | Sabic Global Technologies B.V. | Multiwall sheet, an article, a method of making a multiwall sheet |
| FR2986460A1 (en) | 2012-02-06 | 2013-08-09 | H I S L | MULTI-PANEL ALVEOLIC PLATE COMPRISING GLASS PARTICLES |
| US20180355613A1 (en) * | 2015-12-18 | 2018-12-13 | Sabic Global Technologies B.V. | Lightweight multiwall sheet with high stiffness and method of making it |
| CN110725469A (en) * | 2019-10-23 | 2020-01-24 | 嘉兴赢创实业有限公司 | A kind of multi-layer structure hollow board with good anti-pulling and anti-rolling properties |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4271823A (en) * | 1975-12-31 | 1981-06-09 | The Franklin Institute | Unitary solar collector panel |
| DE8225408U1 (en) * | 1982-09-09 | 1982-12-16 | Röhm GmbH, 6100 Darmstadt | MULTIPLE PLATE |
| US4550543A (en) * | 1984-01-09 | 1985-11-05 | Marcello Valenzano | Construction forms |
| DE9110957U1 (en) * | 1991-09-04 | 1991-11-07 | Degussa Ag, 6000 Frankfurt | Inclined multi-wall sheets made of aromatic polycarbonates |
| DE9408574U1 (en) * | 1994-05-25 | 1994-07-21 | Röhm GmbH & Co. KG, 64293 Darmstadt | Extruded, flat multi-wall sheet made of thermoplastic |
-
1995
- 1995-03-29 FR FR9503678A patent/FR2732386B1/en not_active Expired - Fee Related
-
1996
- 1996-03-27 DE DE69621698T patent/DE69621698T2/en not_active Expired - Fee Related
- 1996-03-27 EP EP96400656A patent/EP0741215B1/en not_active Expired - Lifetime
- 1996-03-27 AT AT96400656T patent/ATE219197T1/en not_active IP Right Cessation
- 1996-03-27 DK DK96400656T patent/DK0741215T3/en active
- 1996-03-27 ES ES96400656T patent/ES2177742T3/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6931796B2 (en) | 2003-02-13 | 2005-08-23 | General Electric | Extruded transparent/translucent sheet for roof structures |
| US8568860B2 (en) | 2007-11-12 | 2013-10-29 | Sabic Innovative Plastics Ip B.V. | Multiwall polymer sheet comprising branched polycarbonate |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69621698D1 (en) | 2002-07-18 |
| EP0741215A1 (en) | 1996-11-06 |
| DE69621698T2 (en) | 2002-11-07 |
| FR2732386A1 (en) | 1996-10-04 |
| ATE219197T1 (en) | 2002-06-15 |
| ES2177742T3 (en) | 2002-12-16 |
| FR2732386B1 (en) | 1997-06-13 |
| DK0741215T3 (en) | 2002-10-07 |
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