Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1981-12-11
1983-09-20
Derrington, James H.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
264138, 264139, 264159, 264163, B32B 3100
Patent
active
044055366
ABSTRACT:
Processes are disclosed for severing a plurality of hollow fiber membranes comprised of thermoplastic material which membranes are arranged in the form of a bundle and also sealing the bores of the membranes in an essentially fluid-tight manner. The severing and sealing of essentially all of the hollow fiber membranes in the bundle can readily be accomplished without any significant decrease in membrane performance or strength. The severing and sealing of the hollow fiber membranes is accomplished by passing a heated member through the bundle in a path transverse to the orientation of the hollow fiber membranes wherein the temperature of the heated member is above the melt temperature of the hollow fiber membranes. Advantageously, the hollow fiber membranes which are severed in accordance with this invention can have a significant void volume and may be anisotropic with a thin, dense skin.
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Central Patents Index, Accession No. 42798U, an abstract of Japanese Patent No. 48-25005 (also identified as 73-25005).
Croskell Henry
Derrington James H.
Hoffman Arthur E.
Kelley Thomas E.
Monsanto Company
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