Disclosed is a method for polymerizing olefins comprising passing a heterogeneous single-site catalyst to a solution or slurry polymerization reactor in the absence of pre-polymerization, wherein the polymerization reactor operates at a temperature of at least 50 C. The heterogeneous single-site catalyst may be suspended and/or dissolved in a solvent selected from the group consisting of oils, aliphatic hydrocarbons and mixtures thereof. Also, the heterogeneous single-site catalyst may be passed to the polymerization reactor at a velocity of greater than 1 m/s or 3 m/s.

The present invention relates to polyethylene resin having excellent impact strength, and more specifically, to polyethylene resin exhibiting excellent impact strength and flexural strength, when prepared into a molded product.

The present disclosure provides a supported hybrid catalyst which facilitates the preparation of polyolefins having improved bubble stability and exhibiting excellent processability for a blown film while maintaining high transparent haze and improved melt strength, and a method for preparing the same.

Disclosed herein are ethylene-based polymers generally characterized by a Mw ranging from 70,000 to 200,000 g/mol, a ratio of Mz/Mw ranging from 1.8 to 20, an IB parameter ranging from 0.92 to 1.05, and an ATREF profile characterized by one large peak. These polymers have the dart impact, tear strength, and optical properties of a metallocene-catalyzed LLDPE, but with improved processability, melt strength, and bubble stability, and can be used in blown film and other end-use applications.

Film made from ethylene-propylene-1-butene terpolymer and propene-butene copolymer blend and ethylene-propylene-1-butene terpolymer and propene-butene copolymer blend.

Blown film made from terpolymers, and terpolymers containing units derived from propylene, ethylene and 1-butene.

The present invention relates to a non-woven fabric comprising fibers which comprise a polypropylene composition comprising a polypropylene having a melt flow rate MFR.sub.2 (230? C./2.16 kg) measured according to ISO 1133 of 10 to 40 g/10 min, a melting temperature T.sub.m as determined by DSC according to ISO 11357 of >152.0? C. to <162.0? C., and a number of 2,1 and 3,1 regio defects as measured by .sup.13C NMR of from 0.01 to 0.85%,
to a process for producing the non-woven fabric, to the use of said non-woven fabric for the production of an article and to an article comprising the non-woven fabric.

The present invention is directed to a fiber reinforced composition (C) comprising a heterophasic polypropylene composition (HECO), fibers (F) and an adhesion promoter (AP) as well as an article comprising said fiber reinforced composition (C).

The present invention relates to a transition metal compound for a catalyst for olefin polymerization and to a catalyst for olefin polymerization comprising the same. Specifically, the present invention relates to a transition metal compound for an olefin polymerization catalyst in which an allyltrimethylsilane substituent is introduced into the cyclopentadienyl group and to a catalyst for olefin polymerization comprising the same.

The present invention relates to an olefin-based polymer, and a method for preparing the same. The olefin-based polymer according to an embodiment of the present invention has a wide molecular weight distribution and thus has excellent processability. Moreover, a relatively large number of short-chain branches are present in high molecular weight components of the olefin-based polymer, and thus the olefin-based polymer has excellent mechanical strength and heat-sealing properties.