| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a spout stopper which does not generate cracks even when being welded, and to provide a packaging container equipped with the spout stopper. <P>SOLUTION: A spout 4 is manufactured by being molded of a low density polyethylene (LDPE). As the LDPE, one having a density of 0.895 g/cm<SP>3</SP>or higher and less than 0.905 g/cm<SP>3</SP>, having a flexural modulus of 180 MPa or higher and less than 220 MPa, having a numeral average molecular weight (Mw) of 200,000 or higher and less than 250,000, and having a value (Mw/Mn), the numeral average molecular weight divided by the weight average molecular weight, of 6 or higher and 7 or lower is used. <P>COPYRIGHT: (C)2011,JPO&INPIT |
