61 results about "Oxidative-induction time" patented technology

The invention discloses a production method of an HDPE regenerated modified material. The following raw materials are adopted: 8-12% of an HDPE large barrel material, 15-18% of an HDPE medium barrel material, 20-23% of an HDPE hollow material, 35-40% of HDPE small and medium hollow materials, 5-8% of an LLDPE material, 0.6-0.8% of color master batches and 2-3% of a toughening modifying agent. The production method comprises the following steps: carrying out primary fusion on the prepared raw materials, then extruding, carrying out one-stage filtration, then carrying out secondary fusion, then extruding, carrying out two-stage filtration, finally carrying out grain-sized dicing, carrying out spin-drying, homogenizing, and then packaging. The production method disclosed by the invention has the advantages that quality problems that existing product quality indexes are unstable, the modulus is low, the plasticity is poor, the oxidation induction time is short and impurities are many are solved, and product enterprise standards are formed; and the product can meet production requirements of HDPE double-wall corrugated pipes with different loop stiffness grades such as SN8, SN10 and SN12.5, the product quality is stable, national standards can be met, quality indexes are close to a domestic PE80-grade fresh material when the product serves as a drainage pipeline, and great cost is saved for downstream enterprises.