The present application relates to a multizone, unsupported, microporous, high throughput membrane. The membrane includes a first microporous zone, a second microporous zone, and a third microporous zone, where the third microporous zone is positioned between the first and second microporous zones, with the first, second, and third microporous zones being integral with one another. Further aspects of the present application include a process for making the membrane and a filtration cartridge with the membrane of the present application.

The present disclosure relates to the research field of functionalized membrane materials and their preparation methods, in particular to a double-layer functionalized hollow fiber membrane and a preparation method thereof. The present disclosure provides a preparation method for a double-layer functionalized hollow fiber membrane, including preparation of the casting solutions, transverse extrusion casting solution, longitudinal stretching, the first coagulation bath, the second coagulation bath, and the third coagulation bath. The double-layer functionalized hollow fiber membrane prepared by the present disclosure has a double-functionalized layer structure with a dense cortical antibacterial layer and a macroporous structure adsorption layer. The double-layer functionalized hollow fiber membrane not only has the function of separation and purification, but also has the function of bacteriostasis and adsorption. The double-layer functionalized hollow fiber membrane has high strength, the wire is not easy to break, and it has a wide application field.

There are provided a porous membrane including a perfluoroalkoxy alkane (PFA)-based melt-extruded film and having pores controlled by biaxial stretching, and a manufacturing method therefore. The porous membrane is for water treatment and includes a fluoropolymer. The method includes forming a film by melt-extruding a fluoropolymer; and controlling the pore size of the formed film by biaxial stretching. The membrane for water treatment is based on a fluoropolymer and has physical properties that are resistant to high temperatures and strong acids, and it is able to be used for treatment of wastewater such as semiconductor wastewater.

The present application relates to a multizone, unsupported, microporous, high throughput membrane. The membrane includes a first microporous zone, a second microporous zone, and a third microporous zone, where the third microporous zone is positioned between the first and second microporous zones, with the first, second, and third microporous zones being integral with one another. Further aspects of the present application include a process for making the membrane and a filtration cartridge with the membrane of the present application.

The present application relates to an unsupported, permanently hydrophilic filtration membrane, and its method of formation. The membrane comprises a polymeric matrix material and a cross-linked polyoxazoline hydrophilic additive blended throughout said matrix material.

The present disclosure relates to a center fluid distributor for a multi-fiber spinneret for producing hollow fiber membranes in a phase inversion process.

The present disclosure provides microporous hollow fiber webs, including connected hollow fibers. At least some of the hollow fibers have an open celled porous structure including microfibrils that connect lamellae microstructures. Methods of making microporous hollow fiber webs are also provided. Such methods include obtaining a hollow fiber web having connected hollow fibers, and stretching the hollow fiber web in a machine direction to fracture at least a portion of the hollow fibers to generate an open celled porous structure.