| 摘要 |
PURPOSE:To obtain a stretching molding markedly improved in a gas barrier property, especially, an oxygen gas barrier property while keeping excellent properties such as sanitarity, aroma retentivity, pressure resistance and lightweight properties, by providing a layer composed of a polyester resin and a layer composed of a specific polyamide resin. CONSTITUTION:A laminated stretching molded product is a laminate consisting of a layer composed of a polyamide resin, which is obtained from hexamethylenediamine being a diamine component and dicarboxylic acid consisting of 55-85mol.% of isophthalic or terephthalic acid (a) and 45-15mol.% of oxydiacetic acid or 1, 3-phenylenedioxy diacetic acid (b) being a dicarboxylic acid component, and a layer composed of polyester resin and oriented at least in one direction. When the use rate of the component (b) exceeds 45mol.%, the glass transition temp. of the polyamide resin is excessively lowered and polymer chips becomes easy to fuse at the time of drying and industrial production can not be smoothly performed. When the use rate is below 15mol.% or less, the glass transition temp. of the polyamide resin becomes extremely high and the co-stretching and the co-extrusion with the polyester resin become difficult. |
