Lg Chem, Ltd

Sang Eun An

Sang Jin Jeon

Kyung Seop Noh

Hee Kwang Park

Sang Hoon Lee

Ji Ho Choi

In Sun Lee

Ki Soo Lee

Byung Seok Kim

Hye Kyung Lee

Jae Youp Cheong

Ra Yun Choi

Myung Han Lee

Hyun Sup Lee

Jin Hyun Park

In Yong Jung

Won-Sang Lee

Sang Eun Kim

The present invention relates to a method for predicting the break-up possibility of a synthetic resin filament in a melt blowing process from the rheological properties of the synthetic resin. According to the present invention, a method that is capable of predicting the break-up possibility of the synthetic resin filament in the melt blowing process for preparing a filament using the synthetic resin in advance, through the measurement of the rheological properties of the synthetic resin, is provided.

Method for preparing a synthetic resin filament in a melt blowing process from rheological properties of the synthetic resin

The present invention relates to a polypropylene having excellent stiffness and achieving energy reduction during foaming.

High-stiffness and energy-reducing polypropylene for foaming

The present invention provides a method for preparing an olefin polymer which can exhibit excellent isotacticity in a high yield and thus is suitable for use in reinforcing a long fiber, and a long fiber comprising an olefin polymer produced according to the above preparation method. In the preparation method, there can be provided an olefin polymer having excellent isotacticity in a high yield can be obtained by using a supported catalyst in which a transition metal compound having a specific structure is supported on a carrier together with two kinds of cocatalysts. In particular, the supported catalyst can exhibit high activity, excellent process stability and high hydrogen reactivity, thereby providing an olefin polymer having a high flow rate with a regular and excellent morphology. Such olefin polymer exhibits high processability while having excellent mechanical properties such as a tensile strength and a flexural strength, and thus are very useful as long fiber reinforced resins. They are used as long fiber reinforced resins and have an advantage in that total volatile organic compounds (TVOC) are significantly low as compared with those of general-purpose long fiber reinforced resins.

Method for preparing long fiber-reinforcing olefin polymer and long fiber

The present invention relates to a polypropylene which exhibits high transparency and has a very low level of generation of volatile organic compounds, which has a total volatile organic compounds (TVOC) value of 60 &#x3bc;g/g or less, which is measured according to VDA 277 standardized by the German Automobile Industry Association by heating the polypropylene for 12 to 5 hours and converting all hydrocarbons detected per 1 g into an acetone content, and a haze value of 5% or less.

Polypropylene

The present invention provides a transition metal compound, a catalyst composition comprising the same, and a method for producing an olefin polymer using the catalyst composition, the transition metal compound being capable of exhibiting high activity in olefin polymerization reaction, and also being capable of easily controlling the physical properties of an olefin polymer. When the transition metal compound is used, it is possible to provide an olefin polymer having an excellent energy-saving effect at the time of processing or molding.

Transition metal compound, catalyst composition comprising same, and method for producing olefin polymer using same

The present invention relates to a metallocene compound having novel structure which can provide various selectivity and activity to polyolefin copolymers, a preparation method thereof, and a preparation method of polyolefin using the metallocene compound.

Metallocene catalyst for preparing a high molecular weight polyolefin and a preparation method thereof

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Daejeon, South Korea

Sang Eun An