Barrier, Adsorptive, and Mechanical Properties of Containers Molded from PET/PP Blends for Use in Pharmaceutical Solutions
- 1 Pharmaceutical Development Research Laboratories of Senju Pharmaceutical Co., Ltd., Kobe, Japan
- 2 Pharmaceutical Development Research Laboratories of Senju Pharmaceutical Co., Ltd., Kobe, Japan
- 3 Pharmaceutical Development Research Laboratories of Senju Pharmaceutical Co., Ltd., Kobe, Japan
- 4 Department of Advanced Fibro-Science, Kyoto Institute of Technology, Kyoto, Japan
- 5 Department of Advanced Fibro-Science, Kyoto Institute of Technology, Kyoto, Japan
- 6 Department of Advanced Fibro-Science, Kyoto Institute of Technology, Kyoto, Japan
Abstract
In this study, the adsorptive properties of L-menthol, moisture vapor transmission rate, and mechanical properties of poly (ethylene terephthalate) (PET), polypropylene (PP), and their blends were evaluated in containers fabricated by injection molding without a compatibilizing agent. These containers intended to hold pharmaceutical solutions contain ing lipophilic chemicals such as L-menthol. By the addition of a small amount of PP, the moisture barrier properties of PET were effectively improved, but its anti-adsorptive property was reduced. The strength of the PET/PP blends was reduced, but some PET/PP blends were still able to bear the experimental load required for application in eye-drop con tainers. PET/PP = 9/1 and PET/PP = 8/2 were found to be most applicable for us ing in the fabrication of containers for medicinal solutions .
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