Method for manufacturing polypropylene resin extruded foam particles
The production of polypropylene resin extruded foam particles with a low open-cell ratio and improved moldability is achieved by extruding and foaming a branched polypropylene resin with reduced amounts of expensive components, addressing the inefficiencies of conventional methods.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- KANEKA CORP
- Filing Date
- 2022-03-29
- Publication Date
- 2026-06-02
AI Technical Summary
Conventional methods for producing polypropylene resin extruded foam particles are inadequate in terms of production cost, closed-cell ratio, and moldability, necessitating a more efficient and cost-effective production method.
A method involving the extrusion and foaming of a polypropylene-based resin with a branched structure, achieved by melt-kneading the resin with a radical polymerization initiator and a conjugated diene compound at 155°C to 195°C in a multi-screw extruder, reducing the amount of expensive components used.
This method enables the production of polypropylene resin extruded foam particles with a low open-cell ratio and excellent moldability at a lower cost, utilizing less energy and raw materials compared to conventional methods.
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