Patent ID: 9631077
Date: 2017-04-25
CPC Classifications: C08L

Claim:
1. A process for preparing a multimodal polyethylene product, said multimodal polyethylene product comprising at least two different polyethylene resins, the process comprising: (a) producing a first polyethylene resin in the presence of a Ziegler-Natta catalyst in a reactor; (b) separately producing a second polyethylene resin in the presence of a Ziegler-Natta catalyst; and (c) physically blending together said first polyethylene resin and said second polyethylene resin to produce the multimodal polyethylene product, wherein the physical blending is performed in a device adapted to continuously melt and blend the first polyethylene resin and the second polyethylene resin; wherein the Ziegler-Natta catalyst used for the production of said first polyethylene resin has an average particle size (D50) of at most 15 μm, with the D50 being measured by laser diffraction analysis on a Malvern type analyzer.