Sintered porous plastic products and method of making same
US6030558A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1998 |
| Grant date | Feb 29, 2000 |
| Priority date | — |
| Expiry date | Apr 23, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249972
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Porous products of thermoplastic polymers and the like are formed by sintering pellets, especially micropellets and/or pellets made by rapid water quenched pelletizing of the polymers, such as by underwater pelletizing or water ring pelletizing. The pellets are of a uniform size and shape, each having approximately equal dimensions along three mutually perpendicular axes, thereby producing porous products having smooth surfaces, narrow pore size distributions, greater strength and other improved characteristics. The porous products include antiperspirant and deodorant applicator heads, wastewater treatment bubblers and selective filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.