Process for producing permeation resistant container

Details Process for producing permeation resistant container Process for producing permeation resistant container

C - Chemistry, Metallurgy

08

J

C08J 7/12 (2006.01) B29C 49/46 (2006.01) B29C 49/04 (2006.01)

Patent

CA 2208825

The present invention discloses an improved process for producing plastic containers with excellent resistance to permeation by solvents such as hydrocarbons, hydrocarbon fuels, and hydrocarbon fuels with organic additives including lower alkanols and ethers consistently and reliably. The process is related to a treatment of plastic containers in a controlled manner with fluorine containing gases while blow molding them. In the process of the present invention, an article of manufacture, a container, is formed and subjected to fluorination by exposure to a fluorination gas. After the fluorination, the container is quenched by exposing the container to a fluorine reactive gas to react with the fluorine, thereby converting the fluorine to a less reactive gas.

Procédé amélioré pour la fabrication de contenants en plastique offrant une excellente résistance à la perméabilité aux solvants, notamment les hydrocarbures, les carburants d'hydrocarbures et les carburants d'hydrocarbures avec additifs organiques, comme des éthers et des alcanols inférieurs, et ce de façon sûre et fiable. Le procédé concerne un traitement contrôlé de contenants en plastique à l'aide de gaz fluorés lors de leur moulage par soufflage. Dans ce procédé, un contenant, produit de fabrication, est formé et fluoré par exposition à un gaz de fluoration. Après celle-ci, le contenant est trempé par exposition à un gaz réactif au fluor de telle façon qu'il y ait réaction avec ce dernier, et conversion du fluor en un gaz moins réactif.

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