| abstract |
TECHNICAL FIELD The present invention relates to an ethylene polymerization process, a catalyst and a method for producing the same, and a manufactured product. In particular, the present invention relates to a pipe, a film having a multimodal molecular weight distribution and excellent physical properties and processability in polymerizing an ethylene copolymer from ethylene and alphaolefin comonomers. It is related with the process of manufacturing the ethylene copolymer which can raise product value, etc., and can raise productivity. In particular, by having a molecular weight distribution and density distribution of three or more rods, the film having a linear low density ethylene copolymer region has an excellent effect of improving the impact strength, and in the medium density ethylene copolymer region, the slow crack growth rate is slow and it can be used at high temperatures. It can produce coalesced pipes. |