FR2759628A1 - Glassy composite - Google Patents
Glassy composite Download PDFInfo
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- FR2759628A1 FR2759628A1 FR9701893A FR9701893A FR2759628A1 FR 2759628 A1 FR2759628 A1 FR 2759628A1 FR 9701893 A FR9701893 A FR 9701893A FR 9701893 A FR9701893 A FR 9701893A FR 2759628 A1 FR2759628 A1 FR 2759628A1
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- glazing
- thickness
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- sheets
- composite
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
- B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10165—Functional features of the laminated safety glass or glazing
- B32B17/10293—Edge features, e.g. inserts or holes
- B32B17/10302—Edge sealing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
- B32B17/10908—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin in liquid form
- B32B17/10917—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin in liquid form between two pre-positioned glass layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
- B29C2045/14532—Joining articles or parts of a single article injecting between two sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
- B29K2709/08—Glass
Abstract
Description
PROCEDE DE DETERMINATION DE LA CONFIGURATION GEOMETRIQUE
OPTIMALE D'UN VITRAGE COMPOSITE VERRE ET MATIERE PLASTIQUE
ET VITRAGE OBTENU PAR CE PROCEDE.PROCESS FOR DETERMINING THE GEOMETRIC CONFIGURATION
OPTIMAL GLASS AND PLASTIC COMPOSITE GLAZING
AND GLAZING OBTAINED BY THIS PROCESS.
La présente invention concerne un procédé permettant de déterminer la configuration optimale d'un vitrage composite verre et matière plastique pour qu'il ait une masse surfacique minimale tout en ayant un bon comportement mécanique vis-à-vis des chocs. The present invention relates to a method for determining the optimal configuration of a glass and plastic composite glazing so that it has a minimum surface density while having good mechanical behavior with respect to impacts.
Dans le domaine des composants pour véhicules automobiles, la tendance est à la limitation des émissions de gaz polluants et par conséquent à la conception de composants allégés. On a en effet constaté qu'un allègement du poids du véhicule de 1 % fait baisser de 0,3 % l'émission de gaz carbonique, toutes choses étant égales par ailleurs. In the field of components for motor vehicles, the tendency is to limit the emissions of polluting gases and consequently to the design of lightweight components. It has in fact been observed that reducing the weight of the vehicle by 1% reduces the emission of carbon dioxide by 0.3%, all other things being equal.
Cette tendance s'applique également aux pièces transparentes du véhicule, telles que les vitrages.This trend also applies to transparent parts of the vehicle, such as windows.
La demande de brevet NO 96 07860 déposée par la même
Demanderesse procède de ce souci. Elle concerne un vitrage composite comprenant une couche de matière plastique intercalaire transparente, comparativement plus épaisse que dans les vitrages composites classiques et qui est comprise entre deux feuilles de verre relativement fines. Pour une même épaisseur totale de vitrage, la proportion de verre/matière plastique est beaucoup plus faible dans un tel vitrage que dans vitrage connus. On arrive ainsi à obtenir des vitrages légers, de poids inférieur à 6 kg/m2.The patent application NO 96 07860 filed by the same
Applicant proceeds from this concern. It relates to a composite glazing comprising a layer of transparent interlayer plastic material, comparatively thicker than in conventional composite glazing and which is between two sheets of relatively thin glass. For the same total thickness of glazing, the proportion of glass / plastic material is much lower in such glazing than in known glazing. It is thus possible to obtain light glazing, weighing less than 6 kg / m2.
Toutefois, la recherche d'un allègement à tout prix du vitrage peut s'accompagner d'une dégradation de sa rigidité de flexion et entraîner par voie de conséquence une diminution de la rigidité du véhicule. However, the search for weight reduction at all costs for the glazing may be accompanied by a degradation of its flexural rigidity and consequently lead to a reduction in the rigidity of the vehicle.
On constate en effet que le remplacement pur et simple de feuilles de verre par des feuilles de polymères de faible poids, tels que polycarbonates, méthacrylates, polyéthylènes ionomères, polyuréthanes, avec conservation d'une rigidité suffisante pour satisfaire aux critères de bon comportement mécanique aux chocs, ne se traduit pas par un allègement. It is in fact observed that the pure and simple replacement of glass sheets by sheets of low weight polymers, such as polycarbonates, methacrylates, polyethylene ionomers, polyurethanes, with retention of sufficient rigidity to meet the criteria of good mechanical behavior at shocks, does not result in weight reduction.
Ceci est dû au fait que le gain de masse spécifique des matières plastiques (qui est de l'ordre de deux fois plus petit que celui du verre) est plus que compensé par la perte de module d'Young de ces matières plastiques.This is due to the fact that the gain in specific mass of plastics (which is of the order of two times smaller than that of glass) is more than compensated for by the loss of Young's modulus of these plastics.
La Demanderesse s'est intéressée au problème de la recherche systématique des vitrages composites verre et matière plastique, en vue de déterminer ceux qui, pour une rigidité de flexion donnée, ont la masse surfacique la plus faible. The Applicant is interested in the problem of the systematic search for composite glass and plastic glazing, with a view to determining those which, for a given bending stiffness, have the lowest surface weight.
En matière de vitrage pour l'industrie automobile, on connaît déjà le vitrage composite comprenant une épaisseur intercalaire de polyvinyl butyral (PVB) comprise entre deux feuille de verre. Toutefois, on a constaté que pour obtenir une rigidité de flexion satisfaisante avec un tel vitrage, il fallait utiliser une très forte épaisseur de PVB, ce qui, malgré le faible poids spécifique de cette matière, conduit à un vitrage nettement plus lourd qu'un vitrage en verre monolithique ayant la même rigidité de flexion. Ceci est dû au fait que l'intercalaire en PVB, en raison de son faible module de compression, s'écrase quand on fléchit le vitrage et que l'effet de poutre conféré par l'intercalaire joue très peu. In terms of glazing for the automotive industry, composite glazing is already known comprising an intermediate thickness of polyvinyl butyral (PVB) between two sheets of glass. However, it has been found that in order to obtain satisfactory flexural rigidity with such a glazing, it is necessary to use a very high thickness of PVB, which, despite the low specific weight of this material, leads to a glazing which is significantly heavier than a glazing. monolithic glass glazing with the same bending stiffness. This is due to the fact that the PVB interlayer, due to its low compression modulus, crashes when the glazing is bent and the beam effect conferred by the interlayer plays very little.
La présente invention a pour objet de déterminer les matières plastiques susceptibles de servir pour la réalisation d'un intercalaire dans un vitrage composite et de déterminer pour chacune de ces matières plastiques, l'épaisseur de matière à introduire entre les deux feuilles de verre pelliculaires ainsi que l'épaisseur optimale de ces dernières pour obtenir, à rigidité de flexion constante, la masse surfacique la plus faible. The object of the present invention is to determine the plastic materials capable of being used for the production of an interlayer in a composite glazing and to determine, for each of these plastics, the thickness of material to be introduced between the two film sheets of glass as well. than the optimum thickness of the latter to obtain, at constant bending stiffness, the lowest surface density.
La Demanderesse a découvert que les matières plastiques qui devraient permettre d'obtenir une masse de vitrage composite inférieure à celle du verre monolithique sont celles qui ont un module de Young d'au moins égal à 20MPa, par exemple celle appartenant au groupe polyéthylène ionomère, polycarbonate, polyuréthane. The Applicant has discovered that the plastics which should make it possible to obtain a mass of composite glazing less than that of monolithic glass are those which have a Young's modulus of at least 20 MPa, for example that belonging to the polyethylene ionomer group, polycarbonate, polyurethane.
L'invention a donc pour objet un procédé de détermination des paramètres géométriques d'un vitrage composite formé d'une épaisseur intercalaire de matière plastique transparente comprise entre deux feuilles de verre, et qui, à rigidité de flexion constante, a une masse surfacique inférieure à celle d'un vitrage monolithique d'épaisseur donnée, caractérisé en ce qu'il consiste
- à sélectionner les matières plastiques dont le module de Young est au moins égal à 20MPa
- à réaliser pour chacune desdites matières plastiques un vitrage composite en plaçant, entre deux feuilles de verre pelliculaires ayant une première épaisseur donnée, une couche de ladite matière plastique d'épaisseur telle que la rigidité de flexion du vitrage obtenu soit égale à celle d'une feuille de verre monolithique ayant une épaisseur de référence donnée
- à mesurer la masse surfacique du vitrage composite ainsi obtenu
- à réaliser de la même façon avec ladite matière plastique des vitrages dont les feuilles de verre pelliculaires ont des épaisseurs croissantes
- à reporter sur un système de coordonnées les valeurs de la masse surfacique de chacun des vitrages en fonction de l'épaisseur des feuilles de verre pelliculaires
- et à relever le minima de la courbe ainsi construite.The subject of the invention is therefore a method for determining the geometric parameters of a composite glazing formed from an intermediate thickness of transparent plastic material comprised between two sheets of glass, and which, at constant flexural rigidity, has a lower surface density. to that of a monolithic glazing of given thickness, characterized in that it consists
- to select plastics whose Young's modulus is at least equal to 20 MPa
- To achieve for each of said plastic materials a composite glazing by placing, between two film sheets of glass having a first given thickness, a layer of said plastic material of thickness such that the flexural rigidity of the glazing obtained is equal to that of a monolithic glass sheet having a given reference thickness
- measuring the mass per unit area of the composite glazing thus obtained
- To achieve in the same way with said plastic glazing whose film glass sheets have increasing thicknesses
- to report on a coordinate system the values of the surface mass of each of the glazing units as a function of the thickness of the film sheets of glass
- and to note the minima of the curve thus constructed.
Ce minima correspond à la géométrie optimale du vitrage, en termes de masse surfacique. L'épaisseur des feuilles de verre pelliculaires de ce vitrage se lit au point minima de la courbe. This minimum corresponds to the optimum geometry of the glazing, in terms of surface mass. The thickness of the laminated glass sheets of this glazing can be read at the minimum point of the curve.
Une valeur avantageuse de ladite épaisseur de référence de la feuille de verre monolithique est de 3 mm, qui est l'épaisseur standard des vitrages de véhicules automobiles. An advantageous value of said reference thickness of the monolithic glass sheet is 3 mm, which is the standard thickness of motor vehicle glazing.
On peut tracer de la même façon pour chaque matière plastique sélectionnée la courbe de variation de la masse surfacique en fonction de l'épaisseur de verre pelliculaire, dans les mêmes conditions que précédemment. On constate que la configuration optimale varie légèrement d'une matière plastique à l'autre. The curve of variation of the surface mass as a function of the film glass thickness can be plotted in the same way for each plastic material selected, under the same conditions as previously. It can be seen that the optimum configuration varies slightly from one plastic material to another.
L'invention concerne également les vitrages composites obtenus par le procédé susmentionné. The invention also relates to composite glazing obtained by the aforementioned process.
L'invention sera à présent expliquée en détail en regard des dessins annexés dans lesquels
la figure 1 représente un graphique montrant l'évolution de la masse surfacique de vitrages monolithiques et composites réalisé en un certain nombre de matériaux, en fonction de la rigidité de flexion de ces vitrages
la figure 2 représente un graphique montrant l'évolution de la masse surfacique de deux vitrages composites comprenant une couche intercalaire sélectionnée, en fonction de l'épaisseur des feuilles de verre pelliculaires.The invention will now be explained in detail with reference to the accompanying drawings in which
FIG. 1 represents a graph showing the evolution of the surface mass of monolithic and composite glazing made of a certain number of materials, as a function of the flexural rigidity of these glazings
FIG. 2 represents a graph showing the evolution of the surface weight of two composite glazing units comprising a selected interlayer, as a function of the thickness of the film sheets of glass.
Avec référence à la figure 1, les courbes a, b et c représentent respectivement les courbes de variation de la masse surfacique en fonction de la rigidité de flexion, d'une feuille monolithique de polyéthylène ionomère, d'une feuille monolithique de polycarbonate et d'une feuille monolithique de verre. With reference to FIG. 1, the curves a, b and c respectively represent the curves of variation of the surface mass as a function of the bending stiffness, of a monolithic sheet of polyethylene ionomer, of a monolithic sheet of polycarbonate and d 'a monolithic sheet of glass.
On voit sur ces courbes que pour obtenir une rigidité de flexion donnée, on doit utiliser des feuilles monolithiques de polyéthylène ionomère et de polycarbonate ayant des masses surfaciques respectives beaucoup plus importantes que celle de la feuille de verre ayant la même rigidité de flexion. Par exemple, pour une rigidité de flexion de 200 N.m les masses surfaciques sont les suivantes : 8 kg/m2 pour le verre, 23 kg/m2 pour le polymère ionomère et 11, 5 kg/m2 pour le polycarbonate. It can be seen from these curves that in order to obtain a given bending stiffness, one must use monolithic sheets of polyethylene ionomer and of polycarbonate having respective surface masses much greater than that of the glass sheet having the same bending stiffness. For example, for a bending stiffness of 200 N.m, the surface masses are as follows: 8 kg / m2 for glass, 23 kg / m2 for the ionomeric polymer and 11.5 kg / m2 for polycarbonate.
Le polymère ionomère et le polycarbonate ne sont que deux exemples de matières plastiques ayant une bonne tenue aux chocs mécaniques. D'une façon générale, les matières plastiques qui possèdent cette propriété et qui peuvent être utilisées dans le cadre de la présente invention sont celles qui ont un module de Young au moins égal à 20MPa. The ionomeric polymer and the polycarbonate are only two examples of plastics having good resistance to mechanical impacts. In general, the plastics which have this property and which can be used in the context of the present invention are those which have a Young's modulus of at least 20 MPa.
La Demanderesse a montré qu'en utilisant ces matières comme couche intercalaire dans un vitrage composite, on peut obtenir des vitrages ayant une masse surfacique inférieure à celle des vitrages formés d'une feuille de verre monolithique, à rigidité de flexion constante. The Applicant has shown that by using these materials as an interlayer in a composite glazing, it is possible to obtain glazing having a basis weight less than that of glazing formed from a monolithic glass sheet, with constant flexural rigidity.
Sur la figure 1 on a représenté également les courbes d et e de variation de la masse surfacique de vitrages composites formés de deux feuilles de verre monolithique de 0,5 mm d'épaisseur chacune, comprenant entre elles respectivement une couche de polycarbonate et une couche de polyéthylène ionomère. Les modules de Young de ces deux matières valent respectivement 80 et 160 MPa. FIG. 1 also shows the curves d and e of variation of the surface mass of composite glazing formed from two sheets of monolithic glass 0.5 mm thick each, comprising between them respectively a layer of polycarbonate and a layer polyethylene ionomer. The Young's moduli of these two materials are respectively 80 and 160 MPa.
On note que les courbes d et e se trouvent sous la courbe c, ce qui signifie qu'à rigidité de flexion constante les vitrages composites à intercalaire en polycarbonate et en polyéthylène ionomère sont plus légers qu'un vitrage en verre monolithique. Ainsi pour la valeur de la rigidité de flexion choisie précédemment, 200N.m, les masses surfaciques correspondant aux cas des courbes d et e sont respectivement de 5,8 et 5,1 kg/m2, donc bien inférieures à celle de la feuille de verre monolithique. It is noted that the curves d and e are located under the curve c, which means that at constant bending rigidity, composite glazing with polycarbonate and polyethylene ionomer interlayer is lighter than a monolithic glass glazing. Thus for the value of the bending stiffness chosen previously, 200N.m, the surface masses corresponding to the cases of curves d and e are respectively 5.8 and 5.1 kg / m2, therefore much lower than that of the sheet of monolithic glass.
On a également représenté sur la figure 1, la courbe f montrant l'évolution de la masse surfacique d'un vitrage composite formé d'une couche intercalaire en PVB (dont le module de Young est supérieur à 20MPa) et deux feuilles de verre pelliculaires de 0,76 mm d'épaisseur, en fonction de la rigidité de flexion. On voit que cette courbe est entièrement située au-dessus de la courbe c. Le PVB ne permet donc pas d'obtenir un allègement du vitrage. Also shown in Figure 1, the curve f showing the evolution of the surface weight of a composite glazing formed of an interlayer of PVB (whose Young's modulus is greater than 20 MPa) and two film sheets of glass. 0.76mm thick, depending on bending stiffness. We see that this curve is entirely located above the curve c. PVB therefore does not make it possible to obtain a lightening of the glazing.
On se référera à présent à la figure 2 qui représente les courbes de variation de la masse surfacique, à rigidité constante, des matières plastiques sélectionnées sur la figure 1, en fonction de l'épaisseur des feuilles de verre pelliculaires, la rigidité de flexion étant maintenue constante et égale à celle d'une feuille de verre monolithique ayant une épaisseur de référence donnée. On choisira par exemple une épaisseur de référence de 3 mm (correspondant à une masse surfacique de 7,5 kg/m2). Pour obtenir cette rigidité de flexion, on introduit une épaisseur convenable d'intercalaire entre les deux feuilles de verre. Reference will now be made to FIG. 2 which represents the curves of variation of the basis weight, at constant rigidity, of the plastics selected in FIG. 1, as a function of the thickness of the film glass sheets, the bending stiffness being kept constant and equal to that of a monolithic glass sheet having a given reference thickness. For example, a reference thickness of 3 mm (corresponding to a basis weight of 7.5 kg / m2) will be chosen. To obtain this flexural rigidity, a suitable thickness of interlayer is introduced between the two sheets of glass.
La figure 2 montre les courbes obtenues avec un intercalaire en polyéthylène ionomère (courbe g) et avec un intercalaire en polycarbonate (courbe h). On a représenté également sur la figure 2, la droite i qui correspond à la feuille de verre monolithique de 3 mm d'épaisseur. FIG. 2 shows the curves obtained with a polyethylene ionomer interlayer (curve g) and with a polycarbonate interlayer (curve h). Also shown in Figure 2, the line i which corresponds to the monolithic glass sheet 3 mm thick.
Ces courbes ont été construites expérimentalement, point par point. On expliquera le mode de construction de l'une d'entre elles, par exemple la courbe g. These curves were constructed experimentally, point by point. The method of construction of one of them will be explained, for example the curve g.
On fabrique un vitrage composite comprenant deux feuilles de verre monolithique ayant chacune une épaisseur de 0,10mm avec une couche intercalaire en polyéthylène ionomère dont l'épaisseur est telle que le vitrage composite obtenu ait une rigidité de flexion égale à celle d'une feuille de verre monolithique de 3 mm d'épaisseur, soit 160 N.m. Cette valeur de la rigidité de flexion se lit sur la courbe c de la figure 1. Elle correspond à une masse surfacique de 7, 5 kg/m2 (puisque la masse surfacique d'une feuille de verre de 1 mm d'épaisseur est de 2,5 kg/m2). A composite glazing is manufactured comprising two sheets of monolithic glass each having a thickness of 0.10 mm with an interlayer of polyethylene ionomer, the thickness of which is such that the composite glazing obtained has a bending stiffness equal to that of a sheet of 3 mm thick monolithic glass, i.e. 160 Nm This value of the bending stiffness can be read on the curve c in figure 1. It corresponds to a basis weight of 7.5 kg / m2 (since the basis weight of a sheet of glass 1 mm thick is 2.5 kg / m2).
Le vitrage ainsi réalisé a pour masse surfacique 7 kg/m2. Le point A de coordonnées 0,10 mm et 7kg/m2 est porté sur le système d'axes de coordonnées de la figure 2. The glazing thus produced has a basis weight of 7 kg / m2. The point A with coordinates 0.10 mm and 7 kg / m2 is plotted on the system of coordinate axes of figure 2.
On place de la même façon les points B, C, D,
E....correspondant aux épaisseurs 0,15 ; 0,20 ; 0,25 0,30 mm.... On obtient ainsi la courbe g. Par le même procédé, on trace la courbe h. On note que les courbes g et h passent par un minimum et par le point M de coordonnées 1,50 mm, 7,5 kg/m2 (absence d'intercalaire).We place the points B, C, D in the same way,
E .... corresponding to the thicknesses 0.15; 0.20; 0.25 0.30 mm .... The curve g is thus obtained. By the same process, the curve h is plotted. It is noted that the curves g and h pass through a minimum and through the point M with coordinates 1.50 mm, 7.5 kg / m2 (no interlayer).
Sur la figure 2, on a également figuré le point k qui correspond à un vitrage ayant un intercalaire en PVB. In FIG. 2, the point k which corresponds to a glazing having a PVB interlayer has also been shown.
Les minima des courbes g et h correspondent aux configurations géométriques optimales. Celles-ci sont résumées sur le tableau suivant. The minima of the curves g and h correspond to the optimal geometric configurations. These are summarized in the following table.
TABLEAU 1
<SEP> Polyéhylène <SEP> Polycarbonate <SEP> Verre <SEP> Polyvinyl
<tb> <SEP> ionomère <SEP> butyral
<tb> Epaisseur <SEP> de <SEP> verre <SEP> (mu) <SEP> <SEP> 0,4 <SEP> <SEP> 0,45 <SEP> - <SEP> 1,51 <SEP>
<tb> Epaisseur <SEP> de <SEP> l'intercalaire <SEP> (nua) <SEP> 2,94 <SEP> 2,66 <SEP> - <SEP> <SEP> 0,38
<tb> Epaisseur <SEP> totale <SEP> (mm) <SEP> 3,74 <SEP> 3,56 <SEP> 3 <SEP> 3,4
<tb>
Par exemple, la configuration optimale du vitrage selon la première colonne du tableau est
verre 0,4 mm/polyéthylène ionomère 2,94 mm/ verre 0,4 mm. <SEP> Polyethylene <SEP> Polycarbonate <SEP> Glass <SEP> Polyvinyl
<tb><SEP> ionomer <SEP> butyral
<tb> Thickness <SEP> of <SEP> glass <SEP> (mu) <SEP><SEP> 0.4 <SEP><SEP> 0.45 <SEP> - <SEP> 1.51 <SEP>
<tb> Thickness <SEP> of <SEP> the interlayer <SEP> (nua) <SEP> 2.94 <SEP> 2.66 <SEP> - <SEP><SEP> 0.38
<tb> Total thickness <SEP><SEP> (mm) <SEP> 3.74 <SEP> 3.56 <SEP> 3 <SEP> 3.4
<tb>
For example, the optimal configuration of the glazing according to the first column of the table is
0.4mm glass / 2.94mm polyethylene ionomer / 0.4mm glass.
Ce vitrage a une épaisseur totale de 3,74 mm et une masse surfacique de 4,94 kg/m2 (0,8 x 2,5 + 1 x 2,94), ce qui représente un allègement d'environ 2,5 kg/m2 par rapport à un vitrage en verre monolithique de 3 mm d'épaisseur (4,94 au lieu de 7,5 kg/m2). This glazing has a total thickness of 3.74 mm and a basis weight of 4.94 kg / m2 (0.8 x 2.5 + 1 x 2.94), which represents a reduction of approximately 2.5 kg / m2 compared to a 3 mm thick monolithic glass glazing (4.94 instead of 7.5 kg / m2).
Dans le vitrage selon l'invention, le rapport entre l'épaisseur de la couche intercalaire et l'épaisseur des feuilles du verre est compris entre 1 et 10. In the glazing according to the invention, the ratio between the thickness of the intermediate layer and the thickness of the sheets of the glass is between 1 and 10.
On voit également sur les courbes de la figure 2 que l'épaisseur de verre varie peu avec le matériau sélectionné. It can also be seen from the curves of FIG. 2 that the glass thickness varies little with the material selected.
La plage optimale d'épaisseur de verre se situe autour de 0,5 mm. On pourra choisir la plage comprise dans l'intervalle 0,5 + 0,1 mm si l'on veut profiter de l'allégement maximal.The optimum glass thickness range is around 0.5mm. You can choose the range in the interval 0.5 + 0.1 mm if you want to take advantage of the maximum lightening.
Si l'on veut faire intervenir d'autres considérations dans le choix de la configuration, telle que la production dans des conditions de coût et de qualité acceptables ou la facilité d'assemblage des composantes, sans pour autant sacrifier trop l'allègement du vitrage, on pourra se contenter d'une plage d'épaisseur comprise dans l'intervalle 0,5 + 0,2 mm. If one wants to bring into play other considerations in the choice of the configuration, such as the production under conditions of acceptable cost and quality or the ease of assembly of the components, without sacrificing too much the lightness of the glazing , it is possible to be satisfied with a range of thickness comprised in the interval 0.5 + 0.2 mm.
Claims (7)
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9701893A FR2759628B1 (en) | 1997-02-18 | 1997-02-18 | METHOD FOR DETERMINING THE OPTIMAL GEOMETRIC CONFIGURATION OF A GLASS AND PLASTIC COMPOSITE GLAZING AND GLAZING OBTAINED BY THIS METHOD |
| EP19970401468 EP0816064A1 (en) | 1996-06-25 | 1997-06-24 | Laminated glass from glass and plastic and process to determinate the optimal geometric parameters of this glass |
| MXPA/A/1997/004764A MXPA97004764A (en) | 1996-06-25 | 1997-06-24 | Encrystal composite of glass and plastic material and procedure for determining the geometric parameters of this encrystal |
| BR9703720A BR9703720A (en) | 1996-06-25 | 1997-06-25 | Joint glazing that incorporates the same and process for determining the optimum geometric parameters of a glazing |
| JP16893697A JPH111349A (en) | 1996-06-25 | 1997-06-25 | Composite glass structure composed of glass and plastic material and determination of optimal geometrical parameter of the structure |
| PL97320772A PL190583B1 (en) | 1996-06-25 | 1997-06-25 | Composote glazing panel of glass and aplastic, assembly incorporating such composite glazing panel, method of making such assembly and method of determining optimum geometric parameters of that panel and glazing panel having such optimised parameters |
| KR1019970027026A KR100479282B1 (en) | 1996-06-25 | 1997-06-25 | Method for measuring geometric parameters optimal for glass composites and glass made of glass and plastic materials |
| US08/882,439 US6265054B1 (en) | 1996-06-25 | 1997-06-25 | Composite glazing material made of glass and plastic and process for determining the optimal geometric parameters of this glazing material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9701893A FR2759628B1 (en) | 1997-02-18 | 1997-02-18 | METHOD FOR DETERMINING THE OPTIMAL GEOMETRIC CONFIGURATION OF A GLASS AND PLASTIC COMPOSITE GLAZING AND GLAZING OBTAINED BY THIS METHOD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2759628A1 true FR2759628A1 (en) | 1998-08-21 |
| FR2759628B1 FR2759628B1 (en) | 1999-04-30 |
Family
ID=9503862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9701893A Expired - Fee Related FR2759628B1 (en) | 1996-06-25 | 1997-02-18 | METHOD FOR DETERMINING THE OPTIMAL GEOMETRIC CONFIGURATION OF A GLASS AND PLASTIC COMPOSITE GLAZING AND GLAZING OBTAINED BY THIS METHOD |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2759628B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1031409A1 (en) * | 1999-01-27 | 2000-08-30 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Method of manufacturing lightweight glazing by multilayer glass/plastic sheets |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0693366A1 (en) * | 1994-06-16 | 1996-01-24 | Saint-Gobain Vitrage | Laminated glass equipped with a band and method for making this glass |
-
1997
- 1997-02-18 FR FR9701893A patent/FR2759628B1/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0693366A1 (en) * | 1994-06-16 | 1996-01-24 | Saint-Gobain Vitrage | Laminated glass equipped with a band and method for making this glass |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1031409A1 (en) * | 1999-01-27 | 2000-08-30 | Ford Global Technologies, Inc., A subsidiary of Ford Motor Company | Method of manufacturing lightweight glazing by multilayer glass/plastic sheets |
| US6270605B1 (en) | 1999-01-27 | 2001-08-07 | Ford Global Technologies, Inc | Method of manufacturing lightweight glazing by multilayer glass/plastic sheets |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2759628B1 (en) | 1999-04-30 |
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