Patent AT-E401188-T1: [Translated] METHOD FOR PRODUCING A HOLLOW SHAPED BODY FROM POLYPROPYLENE FOAM

A polypropylene resin hollow molded foam article has polypropylene resin foam layer (21) formed by placing softened cylindrical foam (2) in metal mold. The melt tension at 230[deg]C of the resin that forms the foam layer is 10-49 mN. The foam layer has apparent density of less than 0.3 g/cm 3>. An independent claim is also included for a process for production of polypropylene resin hollow molded foam article in which a cylindrical foam having foam layer is formed by extruding from a die (3) a foamable molten resin comprising a base resin containing a foaming agent, and then placing the foam in a metal mold while in a softened state. The base resin consists of: (i) a resin composed of polypropylene resin (a) (20-70 wt.%) with melt tension of >= 98 mN and melt flow rate of 0.5-15 g/10 minutes and polypropylene resin (b) (30-80 wt.%) with melt tension of less than 30 mN and melt flow rate of 2-30 g/10 minutes; (ii) resin composed of polypropylene resin (c) (30-70 wt.%) with melt tension of 30-98 mN and melt flow rate of 2-15 g/10 minutes and 30-702 wt.% of (b); (iii) resin composed of 20-70 wt.% (a) and less than 80 wt.% of (c); or (iv) resin composed of (a) (5-65 wt.%) (b) (30-78 wt.%), and (c) (5-65 wt.%). The resin has a composition within the bounds (including the lines) of a quadrangle ABCD defined by the four xyz coordinates A (17, 78, 5), B (5, 72, 23), C (5, 30, 65) and D (65, 30, 5), where resin (a) is x wt.%, (b) is y wt.% and (c) is z wt.% in a triangular component graph in which the upper triangle is marked as 100 wt.% (a), the lower left vertex is marked as 100 wt.% (b) and the lower right vertex is 100 wt.% (c).

[
  "009:25"
]

[
  "009:066"
]

[
  "NIH"
]