Base material for foam insulation paper container, sheet for foam insulation paper container, foam insulation paper container and its manufacturing method

摘要

PROBLEM TO BE SOLVED: To reduce the occurrence of peeling in a seam portion, improve the top curl processability, and improve the productivity of a paper container during the manufacture of a foamed heat insulating paper container, and to provide a base material for the foamed heat insulating paper container. Provided are a sheet for a foamed heat insulating paper container used, a foamed heat insulating paper container, and a method for manufacturing the same. SOLUTION: The base material for a foam-insulated paper container composed of a paper base material containing cellulose pulp as a main component and a water-soluble resin layer provided on at least one surface of the paper base material, and the paper base. The material is composed of three or more pulp layers, and the interlayer strength measured using the internal bond tester of the base material for foamed heat insulating paper container is 530 J / m2 or more, and the outermost layers of the front and back surfaces of the paper base material. When the average value of the basis weight is W1 and the average value of the basis weight of the first inner layer located immediately inside the outermost layer on the front and back is W2, W1 / W2 = 1.2 to 2.4 is satisfied. It is a base material for a foamed heat insulating paper container. [Selection diagram] None