FRESHNESS KEEPING SHEET, AND CORRUGATED FIBERBOARD

摘要

PROBLEM TO BE SOLVED: To provide a recyclable freshness maintaining sheet for fruits and vegetables, and flowers, and a freshness maintaining corrugated fiberboard formed thereof. SOLUTION: In a sheet, an undercoat layer consisting of at least one kind to be selected from an SBR emulsion, a vinyl acetate emulsion, and an acrylic emulsion, and a polyvinyl dichloride(PVDC) layer of 2-5 g/m2 thereon are provided on one side of a paper board. The sheet is 20-200 g/m2 in water-vapor permeability, 1,000-5,000 cc/m2.day in oxygen permeability, and not more than 20,000 cc/m2.day in carbon dioxide permeability. The PVDC layer contains at least one kind to be selected among SBR emulsion, vinyl acetate emulsion and acrylic emulsion of up to 40% in weight in terms of solid content.