CORE MATERIAL OF FILTER MEDIUM ROLL AND FILTER MEDIUM FOLDING SYSTEM EQUIPPED WITH FILTER MEDIUM ROLL

摘要

PROBLEM TO BE SOLVED: To suppress the adhesion of organic matter to a filter medium wound around a paper pipe. SOLUTION: The core material 3 of the filter medium roll 1 is used for taking up the filter material 9 used for cleaning air in a roll shape and provided with the paper pipe 5 and a film 7. The film 7 covers the outer peripheral surface of the paper pipe 5 to suppress the permeation of organic matter.