Abstract: In the present disclosure, there are provided a polypropylene resin composition including an ethylene propylene copolymer, and a method of preparing the same. In particular, the polypropylene resin composition of the present disclosure may be prepared by using a continuous reactor in the presence of a metallocene compound having a specific structure. The polypropylene resin composition of the present disclosure can exhibit high transparency together with excellent elongation by optimizing the xylene soluble, the content of ethylene, and the melt index, together with a narrow molecular weight distribution.

Abstract: The present invention relates to polypropylene non-woven fabric having excellent loft property, a method for preparing polypropylene non-woven fabric having excellent loft property, and a method for evaluating the properties of the polypropylene resin.

Abstract: The present disclosure relates to a steel sheet for pipes having excellent hydrogen-induced crack resistance and a method for manufacturing the same. One aspect of the present invention is to provide a steel sheet for a pipe having excellent hydrogen-induced crack resistance and a method for manufacturing same. According to an aspect of the present disclosure, a steel sheet for pipes having excellent hydrogen-induced crack resistance and a method for manufacturing the same may be provided.

Abstract: Provided is a steel for pipes for use in applications such as oil or gas extraction. Particularly, there are provided a steel for pipes having high fatigue resistance, a method of manufacturing the steel, and a welded steel pipe obtained using the steel.

Abstract: The present invention relates to a hot rolled steel plate used for an oil well pipe for development of petroleum or natural gas, a steel pipe manufactured using the same, and a method of manufacturing the same.

Abstract: Provided is a steel for pipes for use in applications such as oil or gas extraction. Particularly, there are provided a steel for pipes having high fatigue resistance, a method of manufacturing the steel, and a welded steel pipe obtained using the steel.

Abstract: Provided is a hot rolled steel sheet for oil country tubular goods (OCTG). The hot rolled steel sheet for oil country tubular goods (OCTG) according to an aspect of the present invention comprises C: 0.08 to 0.18 wt %, Si: 0.10 to 0.50 wt %, Mn: 1.2 to 2.0 wt %, P: 0.020 wt % or less, S: 0.003 wt % or less, Nb: 0.04 to 0.1 wt %, Cr: 0.05 to 0.5 wt %, Ti: 0.01 to 0.05 wt %, B: 0.0005 to 0.003 wt %, Ca: 0.001 to 0.006 wt %, N: 0.008 wt % or less, a balance of Fe and inevitable impurities, and satisfy Relational Expression 1, 16?30[C]+5[Mn]+5[Si]+6[Cr]+600[B]<17.5??[Relational Expression 1] wherein, [C], [Mn], [Si], [Cr] and [B] refer to wt % of each ingredient.