초록 ▼

A process for the manufacture of porous structures comprises forming a dry mixture comprising a component providing primary separation capability, a component providing green strength reinforcement capability and, a component providing binding capability and selected from the group consisting of the

A process for the manufacture of porous structures comprises forming a dry mixture comprising a component providing primary separation capability, a component providing green strength reinforcement capability and, a component providing binding capability and selected from the group consisting of thermoplastic and thermosetting polymers; delivering the mixture to a suitable surface and building a desired thickness thereof; densifying the mixture into tile form desired for the porous structure; removing the densified porous structure from the surface; binding the component providing the primary separation capability by melting the mixture to a temperature of up to about 20.degree. C. higher than the melting point of any thermoplastic component providing binding capability. Porous structures (100, 110, 120, 125, 140, 175) according to the present invention comprise from about 70 to about 90 parts by weight of a component providing primary separation capability (61, 62); from about one to about 15 parts by weight of a component providing green strength reinforcement capability (64, 65); and, from about eight to about 20 parts by weight of a component providing binding capability (67, 68) and selected from the group consisting of thermoplastic and thermosetting polymers.

대표청구항 ▼

[ What is claimed is:] [1.] A process for the manufacture of porous structures comprising:forming a dry mixture comprising a component providing primary separation capability, a component providing green strength reinforcement capability and, a component providing binding capability and selected fro

[ What is claimed is:] [1.] A process for the manufacture of porous structures comprising:forming a dry mixture comprising a component providing primary separation capability, a component providing green strength reinforcement capability and, a component providing binding capability and selected from the group consisting of thermoplastic and thermosetting polymers;delivering said mixture to a suitable surface and building a desired thickness thereof;densifying said mixture into the form desired for said porous structure;removing said densified porous structure from said surface;binding said component providing said primary separation capability by heating said densified porous structure to a temperature of up to about 20.degree. C. higher than the melting point of any said thermoplastic component providing binding capability. [17.] A process for the manufacture of porous structures, as set forth in claim 1, wherein said step of delivering includes the step of applying said mixture onto a flat support surface and said step of densifying includes the step of pressing said delivered mixture into a sheet of reduced thickness, having sufficient green strength to be self-supporting. A process for the manufacture of porous structures, as set forth in claim 17, including the additional step of applying at least a second dry mixture of components onto said first delivered mixture, prior to said step of densifying. [19.] A process for the manufacture of porous structures, as set forth in claim 17, including the additional steps of applying at least a second mixture, different from said delivered mixture, onto said densified sheet and pressing said second delivered mixture and said densifed sheet into a layered sheet of reduced thickness, having sufficient green strength to be self-supporting.