초록 ▼

A filter medium for filters wherein the evolution of organic gases and dusting from a reinforcing member are depressed and thus the excellent characteristics inherent to a porous polytetrafluoroethylene membrane as a collection layer are fully achieved. The filter medium (1) for filters comprises a

A filter medium for filters wherein the evolution of organic gases and dusting from a reinforcing member are depressed and thus the excellent characteristics inherent to a porous polytetrafluoroethylene membrane as a collection layer are fully achieved. The filter medium (1) for filters comprises a porous polytetrafluoroethylene membrane (2) and a porous ultrahigh-molecular weight polyolefin membrane (3) as a reinforcing member for the filter medium.

대표청구항 ▼

[ What is claimed is:] [1.]1. A filter medium for filters, comprising a laminate comprising a porous ultrahigh-molecular weight polyethylene membrane and a porous polytetrafluoroethylene membrane, wherein ultrahigh-molecular weight polyethylene particles in said porous ultrahigh-molecular weight pol

[ What is claimed is:] [1.]1. A filter medium for filters, comprising a laminate comprising a porous ultrahigh-molecular weight polyethylene membrane and a porous polytetrafluoroethylene membrane, wherein ultrahigh-molecular weight polyethylene particles in said porous ultrahigh-molecular weight polyethylene membrane are bonded to each other so as to form a porous structure provided with voids among said particles.