Flexible multilayer tubular structure for irrigation and...

Details Flexible multilayer tubular structure for irrigation and... Flexible multilayer tubular structure for irrigation and...

A - Human Necessities

01

G

61/34, 154/53.01

A01G 25/02 (2006.01) A01C 23/04 (2006.01) B29C 53/48 (2006.01) B29D 29/00 (2006.01) E02B 13/00 (2006.01) F16L 11/12 (2006.01)

Patent

CA 1056610

ABSTRACT A plastic tublular irrigating structure is provided for agricultural and other irrigation systems. The structure comprises (A) a flexible outer layer of a thermoplastic synthetic resin tube having at least one continuous fin-like heat-sealed portion along its length and watering orifices, and (B) a flexible inner layer, as a filter, of a water-permeable, water- insoluble sheet, preferably a nonwoven fibrous sheet, fixed partly to the inside of the outer layer (A), the inner layer (B) being permeable to a larger amount of water than the outer layer (A). In the absence of water supply, the structure is a flattened tube, but upon supply of water therethrough, it assumes an expand tubular shape.

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