Polyolefin and preparation method thereof

A polyolefin and olefin comonomer technology, applied in the field of polyolefin, can solve the problems of unstable physical properties, rough appearance, etc., and achieve the effect of excellent formability and high die expansion
CN101679540AActive Publication Date: 2010-03-24LG CHEM LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LG CHEM LTD
Publication Date
2010-03-24

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Abstract

The present invention relates to a polyolefin that has high environmental stress cracking resistance (ESCR), a high impact property, and an excellent die swell property, and a method of preparing thesame. According to the method of preparing polyolefin of the present invention, a supported hybrid metallocene catalyst and an alpha olefin comonomer having 4 or more carbon atoms are used to obtain polyolefin having the bimodal or multimodal molecular weight distribution curves during the single reactor polymerization. The polyolefin has excellent processability, a melt flow rate ratio (MFRR) that is useful to processing, excellent shapability, impact strength, tensile strength, in particular, environmental stress cracking resistance (ESCR) and full notch creep test (FNCT), thus being used tomanufacture the blow molded product.
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Description

technical field

[0001] The present invention relates to a polyolefin having high environmental stress crack resistance (ESCR), high impact and excellent die swell, and a preparation method thereof.

[0002] This application claims priority from Korean Patent Application No. 10-2007-0042602 filed with the Korean Intellectual Property Office (KIPO) on May 2, 2007, the entire disclosure of which is hereby incorporated by reference. Background technique

[0003] In general, blow molding is a method in which preforming is performed by using extrusion or injection to form a tube, which is achieved in a mold into which air is blown to expand the formed structure and cooled Curing to obtain a molded body having a predetermined shape. Blow molding is mainly divided into extrusion blow molding (extrusion or direct blow molding), injection blow molding and stretch blow molding according to the preforming method.

[0004] Hollow bottle products having a small thickness and various siz...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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