EMBOSSED FILTER MEDIUM FOR AIR FILTER, FILTER PACK, AIR FILTER UNIT, AND PRODUCTION METHOD FOR EMBOSSED FILTER MEDIUM FOR AIR FILTER

摘要

Provided are an embossed air filter filtration medium, a filter pack, and an air filter unit, with which a rise in pressure loss associated with the embossing process is minimized; and a method for manufacturing an embossed air filter filtration medium with which the rise in pressure loss associated with the embossing process is minimized. The embossed air filter filtration medium is an embossed air filter filtration medium for trapping dust in a stream of air, provided with one or a plurality of porous films that include a fibril-formable polytetrafluoroethylene, a non-fibril-forming and non-hot-melt-processable component, and a non-fibril-forming and hot-melt-processable component having a melting point below 320°C; and a plurality of air-permeable support materials supporting the porous film. The surfaces of both sides of the embossed air filter filtration medium are formed by two air-permeable support materials among the plurality of air-permeable support materials, and the air filter filtration medium is furnished with a plurality of projections by undergoing an embossing process.