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US 5,334,336 AGranted
Method of forming porous pipe using a blowing agent carrier component
AssigneeSubsurface Technology Corporation
InventorsJames J. Franz, Richard A. Hutchinson
Life of this patent
Estimating the term…
Abstract
A process for producing a porous pipe is disclosed and includes forming an extrudable mixture comprising elastomer particles, binder component and a solid water carrier component having a composition other than the elastomer particles and the binder component and being associated with sufficient water to provide porosity to a porous pipe produced from the mixture; and extruding the extrudable mixture to conditions effective to form the porous pipe.
Claims18
A process for producing a porous pipe comprising:
- drying elastomer particles to provide anhydrous elastomer particles with a moisture content insufficient to significantly influence the porosity in said porous pipe;
- forming an extrudable mixture comprising said anhydrous elastomer particles, binder component, a solid blowing agent carrier component having a composition other than said elastomer particles and said binder component, and blowing agent combined with said solid blowing agent carrier component in a sufficient amount to provide porosity to a porous pipe produced from said extrudable mixture, said combined blowing agent being more than about 50% of the total effective blowing agent present in said extrudable mixture;
- controlling the amount of at least one of (1) blowing agent combined with said solid blowing agent carrier component and (2) solid blowing agent carrier component in said extrudable mixture to control the porosity of said porous pipe;
- and
- extruding said extrudable mixture at conditions effective to form said porous pipe, including a wall defining a longitudinally extending interior space and having sufficient porosity to allow liquid water from said longitudinally extending interior space to pass through and out of said wall under normal use conditions.
2 more elements
A process for producing a porous article comprising:
- forming an extrudable mixture including elastomer particles, binder component, a solid blowing agent carrier component which is one or more synthetic ion exchange resins, and blowing agent combined with said solid blowing agent carrier component in a sufficient amount to provide porosity to a porous article produced from said extrudable mixture, said combined blowing agent being more than about 50% of the total effective blowing agent present in said extrudable mixture;
- controlling the amount of a t least one of (1) blowing agent combined with said solid blowing agent carrier component and (2) solid blowing agent carrier component in said extrudable mixture to control the porosity of said porous article;
- and
- extruding said extrudable mixture at conditions effective to form said porous article.
1 more element
A process for producing a porous pipe comprising:
- forming an extrudable mixture comprising elastomer particles with a moisture in said porous pipe, binder component and a solid blowing agent carrier component having a composition other than said elastomer particles and said binder component and being associated with a sufficient amount of blowing agent to provide porosity to a porous pipe produced from said extrudable mixture;
- controlling the amount of at least one of (1) the blowing agent associated with said solid blowing agent carrier component in said extrudable mixture, and (2) said solid blowing agent carrier component in said extrudable mixture to thereby control the porosity of said porous pipe;
- and
- extruding said extrudable mixture at conditions effective to form said porous pipe including a wall sufficiently porous to allow liquid water to pass through and out of said wall under normal use conditions.
1 more element
Dependencies are inferred from the claim text.