Patent ID: 6244454
Filing Date: 2001-06-12
Classification: B29C,B32B,B65D

Abstract:
A multilayered thin container comprising a cylindrical body and a neck portion for cap-fitting, which container is integrally formed by extrusion and blow molding, which container comprises an outer layer composed of a rigidity resin (i) having an elastic modulus of 2,000 to 23,000 kg/cm.sup.2 and an inner layer composed of a rigidity resin (ii) having an elastic modulus of not more than 1,000 kg/cm.sup.2, wherein when extrusion-molding to form a parison, the amount of the rigidity resin (i) extruded for a portion corresponding to said neck portion is increased as compared to that corresponding to the cylindrical body so as to allow said neck portion to exhibit a higher rigidity than that of said cylindrical body; and said outer layer composed of the rigidity resin (i) is extruded into a sectional shape with a plurality of protrusions arranged along the circumferential direction, whereby said cylindrical body is formed with a plurality of ribs composed of the rigidity resin (i) and extending along an axis thereof.