METHOD FOR HERMETICALLY SEALING CONTAINER FOR RETAINING FRESHNESS OF VEGETABLES AND FRUITS AND PACKAGE THEREFOR

摘要

PURPOSE:To retain the freshness of packaged vegetables and fruits for a long period by specifying the gaseous carbon dioxide permeability constant of an outer liner in a corrugated board and a method for sealing. CONSTITUTION:The gaseous carbon dioxide permeability constant of an outer liner in a corrugated board at 27 deg.C is regulated to >=5X10<-10>cm<3> (STP) cm/(cm<2>.sec.cmHg). A hermetically sealing sheet 8 is applied to butted part and superposed parts of the corrugated board in the bottom and lid part of the corrugated board container so as to provide >=1.5 ratio of the gaseous carbon dioxide permeability constant to the oxygen permeability constant of a corrugated board container 7 when the ends of the corrugated board are sealed. Longer hermetically sealing sheets than each side are applied to three surfaces of both sides and the lid or base of respective corner parts 9 and ends which are not applied to the surfaces are mutually laminated. The ends of the hermetically sealed sheets protruding without lamination are utilized and application pieces are applied to the container and fixed.