polymer composition comprising a mixture of a multimodal polyethylene and an ethylene polymer further suitable for manufacturing a drip irrigation pipe

摘要

polymer composition comprising (A) a polymeric base resin comprising (A-1) A multimodal ethylene polymer having a density of 930 kg / m3 or less, determined according to ISO 1183-1: 2004, and ( a-2) a polymer of additional ethylene which is different than the multimodal ethylene polymer (a-1) and wherein the ethylene polymer (a-2) is at least (a-2-b) a polymer of ethylene produced in a polymerization process at high pressure in the presence of a radical initiator, that is polymer, low density ethylene (LDPE), wherein the amount of the multimodal ethylene polymer (a-1) is 65% in weight to 96% by weight and the amount of ethylene polymer (a-2) is 4% by weight to 35% by weight, based on the total amount of the polymeric base resin (a); and (B) carbon black in an amount of 1 to 10% by weight, based on the total amount of the polymer composition; wherein the polymer composition has a MFR5 of 1.5 g / 10 min to 10 g / 10 min, determined according to ISO 1133 at a temperature of 190C and a load of 5 kg.