| 摘要 |
PROBLEM TO BE SOLVED: To provide a propylene polymer excellent in flowability and clean property, high in melting tensile force, and good in dispersibility when blended with other resins.SOLUTION: There is provided a polypropylene polymer satisfying requirements defined following (i) to (iv): (i) a melt flow rate (MFR) (temperature 230°C and load 2.16 kg) is 1 to 80 g/10 min; (ii) a ratio between a weight average molecular weight (Mw) and a number average molecular weight (Mn) (Q value) measured by a gel permeation chromatography is 2.5 to 5.5; (iii) a percentage of a component soluble to p-xylene (CXS) at 25°C is 0.1 wt.% or more and less than 5.0 wt.%; and (iv) a rate of strain hardening (λmax) in a measurement of elongation viscosity is 1.5 or more and less than 6.0. |
