Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Patent
1996-09-27
1998-09-22
Tentoni, Leo B.
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
138118, 239145, 264 404, 264 407, 264 41, 2642096, 405 45, 428 369, 428 3692, B29C 4792, B32B 518
Patent
active
058111646
ABSTRACT:
This invention relates to the manufacture of flexible porous plastic aeration pipe having an essentially uniform porosity throughout its length. The plastic pipe of this invention has a gas permeable wall of thermoset polymer particles and thermoplastic binder for the particles with a substantially uniform plurality of micropores through the wall of about 0.001 inch to 0.004 inch along its length for diffusion of gas therethrough and transfer to a medium. The thermoset polymer particles have a mesh size of about 60 to about 140 mesh, preferably approximately 80 to 100 mesh. The method of manufacture includes volumetric delivery of thermoset polymer particles and thermoplastic binder particles to a mixing chamber for preblending and then controlled volumetric feeding of the preblend into an extruder to form the porous aeration pipe.
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Plastic Specialties and Technologies Investments, Inc.
Tentoni Leo B.
LandOfFree
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