| 摘要 |
PURPOSE:To provide a vessel made of polyethylene which has excellent buckling strength and environmental stress cracking resistance even if a weight of the vessel is reduced. CONSTITUTION:A multilayer plastic vessel 1 of a structure in which two types or more of resin layers are laminated comprises an outer layer 10 made of polyethylene resin having a density of 0.955g/cm<3> or more and an inner layer 11 made of polyethylene resin having a density of 0.945g/cm<2>. As embodiments, in order to further provide excellent environmental stress cracking resistance, the layer 11 is formed of straight-chain low-density polyethylene. In order to enhance its buckling strength, a thickness of the layer 11 is 5 to 20% of the entire thickness. One resin layer containing a recycled material (ground product) of the vessel 1 is provided between the polyethylene resin of the layer 10 and the polyethylene resin of the layer 11, thereby effectively utilizing the ground product generated at the time of molding the vessel, etc. |
