Chemical filter and method for producing the same
AssigneeNichias Corporation
InventorsAkihiro Imai, Takashi Tanahashi, Toshiro Nakano, Tainen Shimotsu, Shiro Ishiwata, Takashi Shimonosono
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Abstract
A chemical filter obtained by fabricating a chemical filter material, the chemical filter material being a woven or nonwoven fabric formed from a hydroxyl group-containing organic fiber, the hydroxyl group-containing organic fiber containing cation exchange groups introduced by radiation graft polymerization, the chemical filter material having an ion-exchange capacity of 400 meq/m2 or more with respect to the cation exchange groups, and the chemical filter material having a tensile strength of 5 to 20 N/15 mm.
Claims8
A chemical filter obtained by fabricating a chemical filter material, the chemical filter material being a woven or nonwoven fabric formed from a hydroxyl group-containing organic fiber, the hydroxyl group-containing organic fiber containing cation exchange groups introduced by radiation graft polymerization, the chemical filter material having an ion-exchange capacity of 400 meq/m2 or more with respect to the cation exchange groups, and the chemical filter material having a tensile strength of 5 to 20 N/15 nun.
A chemical filter obtained by fabricating a chemical filter material, the chemical filter material being a woven or nonwoven fabric formed in a pleated shape from a hydroxyl group-containing organic fiber, the hydroxyl group-containing organic fiber containing cation exchange groups introduced by radiation graft polymerization, the cation exchange groups being a carboxyl group and a strongly acidic cation exchange group, the chemical filter material having an ion-exchange capacity of 100 meq/m2 or more with respect to the carboxyl group, the chemical filter material having an ion-exchange capacity of 300 to 1000 meq/m2 with respect to the strongly acidic cation exchange group, and the chemical filter material having a tensile strength of 5 to 20 N/15 mm.
A method for producing a chemical filter comprising preparing a woven or nonwoven fabric by processing a hydroxyl group-containing organic fiber, introducing ion-exchange groups into the hydroxyl group-containing organic fiber in the woven or nonwoven fabric by radiation graft polymerization to obtain a chemical filter material, and fabricating the chemical filter material to obtain a chemical filter.
A method for producing a chemical filter comprising introducing ion-exchange groups into a hydroxyl group-containing organic fiber by radiation graft polymerization, processing the resulting organic fiber into a woven or nonwoven fabric to obtain a chemical filter material, and fabricating the chemical filter material to obtain a chemical filter.
Dependencies are inferred from the claim text.