Flame-proof corrugated paperboard and method for producing same

Abstract

Provided are a flame-proof linerboard and a flame-proof corrugated paperboard in which with a small coating amount, a flame-proof layer is formed on the surface of a general linerboard so as to reduce penetration of the flame-proofing agent, and which are thus low in cost and exhibit high flame-proof performance. A flame-proof corrugated paperboard (21) is produced which includes, as a linerboard (15), a flame-proof paper including a paper layer (11), a flame-proof layer (12) containing a flame-proofing agent and a polymer having a molecular weight of 8,000 or more and 10,000,000 or less, and an overcoat layer (13) for protecting the flame-proof layer (12), the overcoat layer (13) being disposed closer to the surface of the corrugated paperboard than the flame-proof layer (12) is.

Dependencies are inferred from the claim text.