Propylene homopolymer for stress-resistant molded article, composition containing the polymer, and stress-resistant molded articles obtained therefrom

A stress-resistant molded article which is obtained from a polypropylene resin composition, which is formed by injection molding, wherein the injection molding involves a mold that is designed to form a weld, and

• wherein the polypropylene resin composition comprises 30 to 95 wt % of a propylene homopolymer (A) and 5 to 70 wt % of a filler (C) (wherein the total of the propylene homopolymer (A) and the filler (C) is 100 wt %),
• wherein the filler (C) is glass fibers,
• wherein the propylene homopolymer (A) satisfies the following requirements (1) to (5):
• (1) the ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) according to GPC is in the range of 2.0 to 2.5;
• (2) Mn is in the range of 87,000 to 400,000;
• (3) the content of components soluble in o-dichlorobenzene at 90° C. is not more than 4 wt %;
• (4) the melting point (Tm) is not less than 157° C.;
• and
• (5) the melt flow rate (accordance with ASTM D 1238, 230° C., 2.16 kg load) is in the range of 0.1 to 15 g/10 min.