Abstract: A novel ethylene-.alpha.-olefin copolymer and a molded article formed therefrom, wherein (A) a density is 0.870 to 0.945 g/cm.sup.3, (B) a relation between an activation energy of flow Ea (J/mole K) obtained by measurement of viscoelasticity at at least three temperatures in the molten state and a melt flow rate MFR (g/10 min) satisfies the following equation (1):logEa.gtoreq.4.6-0.04.times.logMFR (1),(C) a coefficient Cx of variation of chemical composition distribution represented by the following equation (2) is 0.40 to 0.80:Cx=.sigma./SCB.sub.ave (2)wherein .sigma. is a standard deviation of chemical composition distribution (1/1,000 C) and SCB.sub.ave is the average of short chain branchings per 1,000 C (1/1,000 C), (D) a ratio of a weight average molecular weight Mw to a number average molecular weight Mn (Mw/Mn) is 3 to 20, and (F) a ratio (TVR) of trans-vinylene type carbon-carbon double bonds to total carbon-carbon double bonds as determined with an infrared absorption spectrum being 1 to 30%.

Abstract: An ethylene-.alpha.-olefin copolymer having;(A) a density (.rho.) of from 0.870 to 0.945 g/cm.sup.3,(B) a ratio (TVR) of trans-vinylene type carbon-carbon double bonds to total cabon-carbon double bonds as determined with an infrared absorption spectrum being 35% or more, and(C) a weight average molecular weight (Mw) of from 3.0.times.10.sup.4 to 6.0.times.10.sup.5, and a molded article comprising thereof. The present invention provides an ethylene-.alpha.-olefin copolymer and a molded article comprising thereof having an excellent transparency, high gloss and high melt tension.

Abstract: A laminate film for wrapping which comprises a layer comprising (A) an ethylene-.alpha.-olefin copolymer having a coefficient of variation of composition distribution (Cx) represented by equation shown below of 0.40 or less and having an ethylene content of 50 mol % or more and at least one layer of a different kind;Cx=.sigma./SCB.sub.avewherein .sigma. is a standard deviation of composition distribution (1/1000 C), and SCB.sub.ave is an average of the number of short chain branchings per 1000 C (1/1000 C).The film is safe and hygienic, less odorous and excellent in transparency, mechanical strength, softness, and low-temperature heat sealing properties and is therefore suitable to automatic wrapping, particularly stretch-wrapping.