Being the waterproof Characteristic sheet conservation the cartridge head outlet of the pollution control mannered

摘要

PROBLEM TO BE SOLVED: To provide an underlay sheet for a flexible container, which can be easily mounted and can prevent contamination of contents of the flexible container.;SOLUTION: This underlay sheet for the flexible container, which serves as a waterproof sheet for protecting an exhaust port of a bottom part of the flexible container, is characterized by being provided with an annular protrusive streak which continues or intermittently continues into a waterproof sheet material.;COPYRIGHT: (C)2004,JPO