The invention belongs to the field of
drainage tubes, and particularly relates to a
polyethylene-
polyvinyl chloride blend-modified tube and a preparation method thereof. The
polyethylene-
polyvinyl chloride blend-modified tube aims to solve the technical problems of poor
shock strength, high sensitivity to temperature, poor ring stiffness, higher cost and short service life in the existing tube. In order to solve the technical problems, the invention provides a
polyethylene-
polyvinyl chloride blend-modified tube which comprises the following components in parts by weight: 50-150 parts of polyethylene resin, 50-150 parts of polyvinyl
chloride resin, 10-30 parts of nano material, 0.5-5 parts of
pigment, 2-20 parts of leadless stabilizer, 1-20 parts of
processing assistant, 1-5 parts of
lubricant, 0.5-5 parts of
antioxidant, 0.5-2 parts of photostabilizer, 1-25 parts of solubilizer, 1-15 parts of
impact-resistant modifier, 1-15 parts of
enhancer and 0.5-10 parts of
coupling agent. The polyethylene-polyvinyl
chloride blend-modified tube has the advantages of higher ring stiffness, favorable
toughness,
aging resistance and greatly higher
shock strength.