Method and apparatus for production of meltblown nanofibers
US10041188B2 · kind B2 · utility
1Cited by
10References
27Claims
0Family size
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Key dates
| Filing date | Apr 17, 2007 |
| Grant date | Aug 7, 2018 |
| Priority date | — |
| Expiry date | Jul 27, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/911
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for producing polymeric nanofibers utilizes a meltblown spinneret die having spin holes formed by grooves in plate(s) surface(s) of plate(s) where polymer exits at the plate(s) edge(s). The grooves are smaller than 0.005″ wide×0.004″ deep and have an L/D at least as large as 20:1. Flow rates of polymer through the apparatus are very low, on the order of 0.01 ghm or less. A meltblown fabric having fibers mostly less than 0.5 microns in diameter is produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.