Molded article of polypropylene-based resin foamed particle molded body, polypropylene-based resin foamed particle, and method for producing same
US11904579B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Feb 12, 2021 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Feb 12, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2423/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A molded article of polypropylene-based resin expanded beads, obtained by in-mold molding of the polypropylene-based resin expanded beads, each bead including: a core layer, in a foamed state, having a polypropylene-based resin; and a covering layer, which covers the core layer, having a polyethylene-based resin. A molded article magnification X [times] of the molded article is 55 times to 90 times, a value of a product X·σ50 of a 50% compressive stress σ50 [kPa] and the molded article magnification X is 6500 or more, and a 5% compressive stress σ5 of the expanded beads molded article is 5 kPa to 25 kPa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.