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US 2019/0153188 A1Published application
Polypropylene-type resin pre-expanded particles, and method for producing said pre-expanded particles
AssigneeKaneka Corporation
InventorsRyoji Nakayama, Ryuta Kutsumizu
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Abstract
Pre-expanded polypropylene-based resin particles include a polypropylene-based resin. The polypropylene-based resin satisfies tan δ≤0.32×V+0.1, where tan δ represents a loss tangent at an angular frequency of 0.1 rad/s in dynamic viscoelastic behavior measurement at 200° C. and V represents a melt fracture take-up speed (m/min) at 200° C.
Claims11
Pre-expanded polypropylene-based resin particles comprising a polypropylene-based resin,
- wherein the polypropylene-based resin satisfies tan δ≤0.32×V+0.1, where tan δ represents a loss tangent at an angular frequency of 0.1 rad/s in dynamic viscoelastic behavior measurement at 200° C. and V represents a melt fracture take-up speed (m/min) at 200° C.
Dependencies are inferred from the claim text.