High-strength and high-toughness polypropylene pipe and preparation method thereof

The present invention discloses high strength and toughness of polypropylene pipe, which pipe is made of the following components by weight by melt extrusion through a rotating blending: 95 to 99.99 parts of polypropylene, 0.01 to 5 parts by β-nucleating agent, wherein β-nucleating agent through intermolecular complexation or hydrogen bond self-assemble form an aromatic, rare earth, organic acids and salts of the compounds of the fibers, the hoop tensile strength of the pipe is 20 ~ 42MPa, ring 1000 to 1600% elongation to fracture. The present invention also discloses a method for preparing the tubing. The present invention utilizes a unique β-type nucleating agent acts self-assemble into fibers, and the die and the mandrel means and the rotation mode and the rotational speed of the extrusion process conditions such as fiber-matching can deviate axially aligned nucleating agent, induction in the surface of epitaxial crystallization of polypropylene fibers, polypropylene β deviates axially oriented crystal, to thereby obtain hoop strength and toughness were significantly enhanced new polypropylene tube. Preparation method is simple and mature, easy to master control, and easy application.