| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter medium for an air filter which improves the efficiency of filter characteristics, especially reduces a pressure loss, improves the efficiency of collection, and keeps the water repellency of the filter medium. SOLUTION: In the filter medium for the air filter, glass fibers are incorporated as a main component and bonded to each other at their intersection points with a binder, and the binder and an acetylene surfactant are adhered to the surfaces of the glass fibers.
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