The process of preparing polyvinyl alcohol films or sheets for use as packaging.

Abstract

OCR 09WP 07 / 10 / 2567 Method for preparing polyvinyl alcohol films and sheets for use as packaging. Begin by preparing a 5% by weight polyvinyl alcohol solution. Add the remaining amount by volume, then mix with glycerol, heat and stir the mixture, and then add ethyl alcohol. (ethyl alcohol), then add tetraethyl orthosilicate and add the tri-compound. Ethoxy(phenyl) silane (triethoxy(phenyl) silane) is heated, and the resulting mixture is poured into plastic molds. It is formed into a film or sheet and then baked.

Claims

OCR 09WP 07 / 10 / 2567 1. The process for preparing polyvinyl alcohol films and sheets for use as packaging involves the following steps: A. Prepare a 5% by weight / volume polyvinyl alcohol solution. Mix 5 grams of polyvinyl alcohol with distilled water and adjust the volume to 100 milliliters. Stir the mixture and heat it at 80°C for 3 hours. A homogeneous and clear polyvinyl alcohol solution will be obtained. B. Mix the polyvinyl alcohol solution obtained from step A with glycerol, which acts as a plasticizer, in a ratio of 1-5% by weight to the polyvinyl alcohol solution. Heat the mixture to 80°C and stir for 3 hours. Then add 5% by volume of ethyl alcohol to the polyvinyl alcohol solution. Next, add 3-20% by weight of tetraethyl orthosilicate to the polyvinyl alcohol solution. Finally, add 1-5% by weight of triethoxy(phenyl) silane to the polyvinyl alcohol solution. Heat the mixture to 60°C for 20 hours. C. Pour the mixture obtained from step B into a plastic mold to form it into a film or sheet, then bake it at 60 degrees Celsius for 24 hours.

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