Method for forming irrigation pipe having a porous side wall

Details Method for forming irrigation pipe having a porous side wall Method for forming irrigation pipe having a porous side wall

1989-03-10

1990-06-05

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

264 48, 264 50, 2642091, 264321, 425 4C, 4253261, B29C 4720

Patent

active

049312367

ABSTRACT:
The method of forming a porous pipe including extruding in a plasticized state two particulate incompatible resins, one of which is a thermosetting resin and the other a thermoplastic resin, and passing a gas through the wall of the extruding pipe and into the atmosphere to form a maze of gas passages between the particles of the incompatible resins.

REFERENCES:
patent: 2807505 (1957-09-01), Weitzel
patent: 2912041 (1959-11-01), Boggs
patent: 3060512 (1962-10-01), Martin et al.
patent: 3230902 (1966-01-01), Grimm et al.
patent: 3466705 (1969-09-01), Richie
patent: 3558753 (1971-01-01), Edlin
patent: 4028288 (1977-06-01), Turner
patent: 4110420 (1978-08-01), Turner

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