Chemical process for obtaining anti-reflective glass,...

C - Chemistry – Metallurgy – 03 – C

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C03C 15/00 (2006.01)

Patent

CA 2590173

The invention relates to a chemical process for obtaining anti-reflective glass, comprising immersion in an acid solution, for the simultaneous and continuous production of one or more parts and/or sheets of glass having standard, special or variable dimensions, thicknesses, colours, uses and applications. The inventive process can be used to obtain glass with an anti- reflective finish in a simultaneous and continuous manner on both sides (atmospheric side and tinned side) of the glass sheet or of various different glass parts and/or sheets simultaneously by means of immersion. Said process comprises the use of containers of glass and containers of chemical solutions which are covered with a special polymer or resin in order to prevent chemical attack from the chemical solutions used in the process. The aforementioned chemical solution containers are encapsulated such that all of the factors involved in the operation can be controlled and ensured. The invention also comprises the use of a variable-speed chain hoist which is used to transport, convey and immerse the containers of glass sheets into the containers of chemical solutions. The purpose of the invention is to use a novel method in order to obtain an anti-reflective glass which exceeds the characteristics of anti-reflective glass obtained using known methods, with increased productivity and quality and less physical and environmental risk since each of the operations in the process is fully and safely controlled.

L'invention concerne un procédé chimique permettant d'obtenir un verre antireflet par immersion dans une solution acide afin de mettre en oeuvre une production simultanée et continue d'une ou plusieurs pièces et/ou lames de verre de dimensions, épaisseurs, couleurs, usages et applications normalisés, spéciaux et variables. On obtient ainsi un verre antireflet de manière simultanée et continue sur les deux faces (face atmosphérique et face étamée) de la feuille de verre et dans diverses feuilles et/ou pièces de verre simultanément par immersion au moyen de conteneurs en verre et de conteneurs de solutions chimiques recouverts d'une résine ou d'un polymère spécial afin d'éviter l'attaque des solutions chimiques utilisées dans le procédé chimique, ces conteneurs de solutions chimiques étant encapsulés pour contrôler et assurer tous les facteurs de cette opération du procédé, et également au moyen d'un palan à vitesse variable pour le transport, le transfert et l'immersion des conteneurs de feuilles de verre dans les conteneurs de solutions chimiques. Le but de l'invention est d'obtenir un verre antireflet au moyen d'un nouveau procédé qui améliore les caractéristiques des verres antireflet obtenus par les procédés connus, avec une productivité et une qualité accrues et un risque physique et écologique réduit étant donné que chacune des opérations de la totalité du procédé est totalement et sûrement contrôlée.

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