A - Human Necessities – 01 – G
Patent
A - Human Necessities
01
G
400/1100, 400/50
A01G 27/00 (2006.01) A01G 25/00 (2006.01) A01G 25/06 (2006.01)
Patent
CA 1237212
Abstract IMPROVED POROUS IRRIGATION PIPE AND METHOD A mixture of crumb rubber, binder, such as polyethylene, and slip contact agent, such as talc, and lubricant, such as a metal stearate, is formed in a blender (10), is shaped into pellets (32) by extruding a strand of the mixture (26) into water (28) and breaking the strand into pellets. The pellets (32) are adjusted to a preselected water content in drier (46) before storage in closed bags (50), stored and reinforced a container (54). The controlled water content pellets (32) are formed into porous pipe (88) by extrusion in pipe extruder (62) having the feeding, transition and metering zones separately heated to temperatures from 320°F. to 400°F. (T1, T2, T3). The die has a separate jacket (90) receiving heat exchange fluid for heating the die (68) to a temperature from 290°F. to 380°F. to form a porous pipe (88) having more uniform porosity. Porosity is controlled by selecting water content of the pellets and controlling die temperature.
477677
Aquapore Corporation
Mcfadden Fincham
LandOfFree
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