초록 ▼

Processes are disclosed for coating the exteriors of a plurality of hollow fibers which are suitable for fluid separations and which are assembled in the form of a bundle. The processes involve immersing the bundle of hollow fibers in a coating liquid containing material suitable for forming the coa

Processes are disclosed for coating the exteriors of a plurality of hollow fibers which are suitable for fluid separations and which are assembled in the form of a bundle. The processes involve immersing the bundle of hollow fibers in a coating liquid containing material suitable for forming the coating and a substantial amount of solvent. A pressure drop from the exteriors to the interiors of the hollow fibers is provided to result in the formation of a deposit on the exteriors of the hollow fibers. The processes of this invention enable essentially the entire exterior surfaces of the hollow fibers to be coated without undue sticking of the hollow fibers or providing undesirably thick coatings on the hollow fibers in any portion of the bundle or on a portion of any of the hollow fibers.

대표청구항 ▼

A process for coating the exteriors of hollow fibers assembled in the form of a bundle, which fibers, when coated, are suitable for fluid separations, comprising immersing the bundle of hollow fibers in a coating liquid containing material suitable for forming the coating and a sufficient amount of

A process for coating the exteriors of hollow fibers assembled in the form of a bundle, which fibers, when coated, are suitable for fluid separations, comprising immersing the bundle of hollow fibers in a coating liquid containing material suitable for forming the coating and a sufficient amount of solvent to redissolve or resuspend any deposits on the hollow fibers of said material suitable for forming the coating which deposits are not retained on the hollow fibers; subjecting the hollow fibers to a pressure drop from the exterior to interior of the hollow fibers while the bundle is immersed in the coating liquid, said pressure drop being sufficient to provide a deposit of the material suitable for forming the coating on the hollow fibers; and removing the coating liquid from the bundle.