Abstract The invention concerns a membrane filtration type hollow fiber. It is composed of a single material phase which material is a chain high polymer and capable of forming fibers by the spinning of the high polymer. The cylindrical wall defining the hollow fiber represents a three-dimensional net-like structure of fine filtering passages of 0.05 to 1 micron, preferably 0.1 to 1 micron. This structure occupies substantially the whole mass of the tubular wall or a closed ring band zone when seen in any cross-section of the wall, providing thus an effective and active filtering zone. The pore rate amounts to at least 55%, and active points of the filtering passages for governing minimum passable sizes of the passages for solids included in a filtering liquor to be treated upon are distributed at random throughout at least the active zone. These sizes are nearly uniform.
A membrane filtration type hollow fiber comprised of a single material phase, the material being a synthetic or semisynthetic chain high polymer capable of forming fibers other than cellulose acetate, wherein the cylindrical wall defining said hollow fiber represents a three-dimensional net-like structure of fine filtering passages of 0.05 to 1 micron, said structure occupying the whole mass of said wall when seen in any cross-section of said wall, providing thus an effective and active filtering zone, the total pore volume amounting to at least 55%, active points of the filtering passages for governing minimum passable sizes of said passages for solids included in a filtering liquor to be treated being distributed at random throughout the whole mass of said wall providing said active zone, said passages being nearly uniform.
Claim 2
Dependent Claim
130 words
A membrane filtration type hollow fiber comprised of a single material phase, the material being a synthetic or semisynthetic chain high polymer capable of forming fibers other than cellulose acetate, wherein the cylindrical wall defining said hollow fiber represents a three-dimensional net-like structure of fine filtering passages of 0.05 to 1 micron, said structure occupying the whole mass of said wall when seen in any cross-section of said wall, providing thus an effective and active filtering zone, the total pore volume amounting to at least 55%, active points of the filtering passages for governing minimum passable sizes of said passages for solids included in a filtering liquor to be treated being distributed at random throughout the whole mass of said wall providing said active zone, said passages being nearly uniform.
Claim 3
Dependent Claim
17 words
A hollow fiber according to claim 1, wherein the fine filtering passages are 0.1 to 1 micron.