Method of blending components for porous plastic pipe processing
US5811038A · kind A · utility
17Cited by
42References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Sep 27, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/04
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to the manufacture of flexible porous plastic irrigation and aeration pipe having an essentially uniform porosity throughout its length. The process for making the porous pipe includes volumetrically delivering to a mixing hopper for preblending thermoset polymer particles and a thermoplastic binder for the particles, preblending the components in the hopper, volumetrically feeding from the hopper the preblended components for controlled discharge into an extruder, and extruding the preblended components to produce the porous plastic pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.