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| Intercalations of crystalline lithium aluminates |
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| Flame retardant polyphenylene oxide thermoplastics |
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| Hot melt adhesive |
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| Flame retardant compositions |
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Underground irrigation porous pipe
| Details |
Inventors: Turner, James E.;
Assignee: Ballas, trustee; George C. (Houston, TX)
Primary Examiner: Aegerter; Richard E.
Assistant Examiner: Schmidt; Frederick R.
Attorney, Agent or Firm: Bard, Springs & Jackson
A porous pipe primarily of rubber and synthetic rubber reclaimed from rubber tires, ground to a relatively small granular size, with metal removed; such as, for example, would pass through a 30-mesh screen, process-mixed through a pipe extruder, with a much smaller binder mix of primarily polyethylene, along with vinyl, ABS binder, and a trace of attaclay. The resulting product is useful as a subsurface irrigation buried pipe, having high structural integrity effectively resisting soil-loading pipe collapse, and it even resists collapse from moderately large rocks in the soil, and yet has a high degree of flexibility along its length. A pipe is provided with cross sectional area of pipe wall more than twice the cross sectional area of the pipe opening. It is a water-leaking pipe formed in the process through the extruder with limited foaming from steam originating from absorbed moisture in the ground, reclaimed rubber tire material, and from residual gasses venting from the material mix, with product mix heating in the extruder, forming some open cell fluid flow paths. The foaming with steam and gasses from the mix also form labyrinth passageways between the rubber tire granuals and the polyethylene binder mix, and also through the binder mix that is non-compatible with the rubber granules but that forms a physical interconnective structural material binder therefor. |
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DETAILED DESCRIPTION I claim: 1.
Irrigation conduit means comprising: a substantially flexible tubular member formed of a plurality of random sized, random shaped, and random spaced, elastomer bodies, and a polyethylene binder mix intermixed with said bodies to provide a porous sidewall having a labyrinthine network of irregularly shaped and sized channel-like apertures closely spaced at random along its length and about its circumference.
2.
Irrigation conduit means according to claim 1 wherein said tubular member is formed of granulated elastomer bodies to provide said channel-like apertures.
3.
Irrigation conduit means according to claim 2 wherein at least a substantial portion of said elastomer is a reclaimed rubber material.
4.
Irrigation conduit means according to claim 3 wherein said reclaimed rubber material is discarded automobile wheel casings.
5.
Irrigation conduit means according to claim 4 wherein said rubber material is in the form of granules having generally a diameter less than one-sixteenth inch.
6.
Irrigation conduit means comprising: a substantially flexible tubular member formed of a plurality of random sized, random shaped, and random spaced elastomer bodies, said elastomer bodies being granulated reclaimed rubber of discarded automobile wheel casings and having generally a diameter less than one-sixteenth inch, a binder interconnecting said bodies to provide a porous sidewall having a labyrinthine network of irregularly shaped and sized channel-like apertures closely spaced at random along its length and about its circumference, said binder being present in the range of 10% to 40% by weight and being composed of a mixture of polyethylene, vinyl, ABS binder, and attaclay.
7.
Irrigation conduit means according to claim 6 wherein said labyrinthine apertures are sized to provide a pipe leak rate of between 12 to 20 gallons of water per one-hundred feet per hour at an internal water pressure of between 5 to 10 pounds per square inch.
Description:
This invention relates in general to irrigation systems and, in particular, to an irrigation porous pipe processed primarily of reclaimed material from rubber tires, ground to small granular size, mixed with a binder, mainly of polyethylene, with walling sized to withstand soil loading in an underground irrigation environment
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Adhesives and Rubbers 
