MULTI-LAYER EXPANSION-MOLDED ARTICLE OF POLYPROPYLENE RESIN,...

Details MULTI-LAYER EXPANSION-MOLDED ARTICLE OF POLYPROPYLENE RESIN,... MULTI-LAYER EXPANSION-MOLDED ARTICLE OF POLYPROPYLENE RESIN,...

2005-04-05

2005-04-05

Pyon, Harold (Department: 1772)

Stock material or miscellaneous articles

Hollow or container type article

C428S036500, C428S036600, C428S035700, C264S045100

Reexamination Certificate

active

06875484

ABSTRACT:
A multi-layer expansion-molded article of a polypropylene resin, which is obtained by molding a multi-layer parison comprising a foamed resin layer and a resin layer provided on the outer side of the foamed resin layer in a mold in such manner that at least part of the opposed inner surfaces of foamed resin layer in the parison are fusion-bonded to each other, and has a polypropylene resin layer on the surface of a foamed polypropylene resin layer, wherein a melt tension, MTfr(gf) and a melt flow rate, MFRfr(g/10 min) obtained by measurement to a polypropylene resin forming the foamed resin layer in the expansion-molded article satisfy the relationship [log MTfr>−0.74 log MFRfr+0.66], and a melt tension, MTur(gf) and a melt flow rate, MFRur(g/10 min) obtained by measurement to a polypropylene resin forming the resin layer on the surface of the foamed resin layer satisfy the relationship [log MTur>−1.02 log MFRur+0.47].

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