BIAXIALLY ORIENTED POLYOLEFIN PIPE

摘要

An axially and circumferentially oriented, i.e., biaxially oriented polyolefin pipe, wherein a degree of orientation thereof in the circumferential direction is set higher than that thereof in the axial direction, whereby providing a biaxially oriented pipe having an excellent elastic deformability; i.e. excellent deformation follow-up characteristics with respect to an external stress and an improved circumferential elasticity; and a high earthquake resistance which constitute performances required by this pipe when it is used as a buried pipe.