Polyolefin resin foam sheet and laminate
AssigneeToray Industries, Inc.
InventorsHirotaka Kondo, Yoshiyuki Oka
Life of this patent
Estimating the term…
Abstract
A polyolefin resin foam sheet includes a resin mixture as a base resin, the resin mixture including 0% by mass or more and 30% by mass or less of polyethylene resin, 30% by mass or more and 80% by mass or less of polypropylene resin, and 20% by mass or more and 40% by mass or less of a polyolefin elastomer, the polyolefin resin foam sheet fulfilling a range of −35% or more and 0% or less for dimensional changes in machine and transverse directions under heating for 10 minutes at a temperature 20° C. higher than a maximum melting point that is a highest melting peak in a differential scanning calorimetry.
Claims13
1-12. (canceled)
A polyolefin resin foam sheet comprising:
- a resin mixture as a base resin, the resin mixture comprising 0% by mass or more and 30% by mass or less of polyethylene resin, 30% by mass or more and 80% by mass or less of polypropylene resin, and 20% by mass or more and 40% by mass or less of a polyolefin elastomer, the polyolefin resin foam sheet having −35% or more and 0% or less for dimensional changes in machine and transverse directions under heating for 10 minutes at a temperature 20° C. higher than a maximum melting point that is a highest melting peak in a differential scanning calorimetry.
A polyolefin resin foam sheet satisfying:
- 2.5 or less for a value obtained by dividing a 25% compressive strength (kPa) by a density (kg/m3);
- and −35% or more and 0% or less for dimensional changes in machine and transverse directions obtained under heating for 10 minutes at a temperature 20° C. higher than a maximum melting point that is a highest melting peak in a differential scanning calorimetry.
Dependencies are inferred from the claim text.