Method of making polymer powders and whiskers as well as particulate products of the method and atomizing apparatus
US6171433A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1997 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Jul 17, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Method for making polymer particulates, such as spherical powder and whiskers, by melting a polymer material under conditions to avoid thermal degradation of the polymer material, atomizing the melt using gas jet means in a manner to form atomized droplets, and cooling the droplets to form polymer particulates, which are collected for further processing. Atomization parameters can be controlled to produce polymer particulates with controlled particle shape, particle size, and particle size distribution. For example, atomization parameters can be controlled to produce spherical polymer powders, polymer whiskers, and combinations of spherical powders and whiskers. Atomizing apparatus also is provided for atoomizing polymer and metallic materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.