Multi-layered biaxial stretch blow molded bottle and method for production thereof
AssigneeKureha Corporation
InventorsTakashi Sato, Hisanori Tobita, Daisuke Itoh, Norio Ozawa
Life of this patent
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Abstract
A multi-layer biaxially stretched blow bottle having a 3-layer structure of PET/nylon MXD6/PET or a 5-layer structure of PET/nylon MXD6/PET/nylon MXD6/PET, wherein the oxygen gas transmission coefficient of the nylon MXD6 layer is at most 6.0×10−14 cm3·cm/cm2·sec·cmHg as measured under conditions of a temperature of 23° C. and a relative humidity of 80%, and a production process of the bottle by biaxial stretch blow molding at a low stretching temperature and high draw ratios.
Claims8
A multi-layer biaxially stretched blow molded bottle having a 3-layer structure of polyethylene terephthalate/nylon MXD6/polyethylene terephthalate or a 5-layer structure of polyethylene terephthalate/nylon MXD6/polyethylene terephthalate/nylon MXD6/polyethylene terephthalate,
- wherein the multi-layer biaxially stretched blow molded bottle is obtained by subjecting a multi-layer preform to biaxial stretch blow molding at a stretching temperature of 86-94° C., a draw ratio in a machine direction of 2.15-3.30 times by means of a stretching rod, and a draw ratio in a transverse direction of 4.70-5.50 times by blowing high-pressure air within a blow mold, and
- wherein the oxygen gas transmission coefficient of the nylon MXD6 layer is at most 6.0×10−14 cm3·cm/cm2·sec·cmHg as measured under conditions of a temperature of 23° C. and a relative humidity of 80%.
A multi-layer biaxially stretched blow molded bottle having a 3-layer structure of polyethylene terephthalate/nylon MXD6/polyethylene terephthalate or a 5-layer structure of polyethylene terephthalate/nylon MXD6/polyethylene terephthalate/nylon MXD6/polyethylene terephthalate,
- wherein the multi-layer biaxially stretched blow molded bottle is obtained by subjecting a multi-layer preform to biaxial stretch blow molding at a stretching temperature of 87-93° C., a draw ratio in a machine direction of 2.20-3.00 times by means of a stretching rod, and a draw ratio in a transverse direction of 4.80-5.20 times by blowing high-pressure air within the blow mold, and
- wherein the oxygen gas transmission coefficient of the nylon MXD6 layer is at most 6.0×10-14 cm3·cm/cm2·sec·cmHg measured under conditions of a temperature of 23° C. and a relative humidity of 80%.
Dependencies are inferred from the claim text.