Porous tubes and hollow profile structures and method of making

Details Porous tubes and hollow profile structures and method of making Porous tubes and hollow profile structures and method of making

1977-01-17

1980-01-08

Anderson, Philip

Hydraulic and earth engineering

Drainage or irrigation

Porous or apertured pipe, flume, or tileway

264 453, 264 459, 264 49, 264117, 264173, 405 43, B29D 2700, A01G 2506

Patent

active

041825829

ABSTRACT:
A method of producing porous tubes and hollow profile structures is characterized by coextruding different materials each through a separate section of a tube-forming extrusion die, one material being pore-forming and producing a porous wall section extending lengthwise of the extruded tube for providing a means of dispersing therethrough a fluid flowing internally of the tube, the other material being non-pore-forming or less pore-forming and producing a non-porous or less porous wall section extending lengthwise of the tube for providing mechanical strength to the tube.
Also disclosed are a number of porous tube and hollow profile structures including various arrangements of porous and non-porous wall sections.

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