Foamed polyolefin-based-resin sheet
AssigneeSekisui Chemical Co., Ltd.
InventorsAsami Nagai, Daisuke Mukohata
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Abstract
The present invention provides a polyolefin resin foam sheet having an area density of 5 g/m2 or more and 400 g/m2 or less, and having a time (t) required for a weight decrease from 90% by mass to 10% by mass, of 9 minutes or more, as measured by thermogravimetric analysis carried out at a heating rate of 10° C./min and a measurement temperature of 23° C. to 550° C. According to the present invention, a polyolefin resin foam sheet can be provided that has a high fire retardancy while maintaining a lightweight property.
Claims3
A polyolefin resin foam sheet having an area density of 5 g/m2 or more and 400 g/m2 or less, and having a time (t) required for a weight decrease from 90% by mass to 10% by mass, of 9 minutes or more, as measured by thermogravimetric analysis carried out at a heating rate of 10° C./min and a measurement temperature of 23° C. to 550° C.,
- wherein the polyolefin resin foam sheet has an apparent density of 0.035 g/cm3 or less,
- wherein a polyolefin resin constituting the polyolefin resin foam sheet is a combination of a polyethylene resin and a polypropylene resin,
- wherein the polyolefin resin foam sheet comprises 5 to 50 parts by mass of a fire retardant with respect to 100 parts by mass of a polyolefin resin, and,
- wherein the fire retardant consists only of a phosphorus spiro compound.
Dependencies are inferred from the claim text.