polypropylene-based resin, polypropylene-based resin composition, and injection foam molding body

摘要

It is superior in flowability, and foaming Characteristic because even with the large-sized die formation is possible with narrow early cavity clearance at the time of applying to especially ejection foaming, being thin, it offers the polypropylene regin and the propylene resin constituent which can obtain the appearance satisfactory ejection foaming body of the large area.This invention can, linear polypropylene resin, the radical polymerization initiator and conjugate diene compound melting mixing, at condition of the 230 and the 2.16kg load the melt flow rate which is measured exceeds 30g/10 minute and below 250g/10 minute, melt tension with the 200 above 0.3cN, at the same time, regards the polypropylene regin constituent for ejection foaming which features that the loss tangent tan which is ratio of storage elastic modulus and loss elastic modulus at of the angular frequency 1rad/s in dynamic visco-elastic measuring with the 200 is 6.0 or less, contains the polypropylene regin, and the aforementioned polypropylene regin.