Method for producing filaments of polyacrylonitrile and extrusion head for carrying out said method
US10633769B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 14, 2015 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Aug 7, 2036 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D4/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for producing filaments of polyacrylonitrile and an extrusion head for carrying out said method are provided, wherein the method comprises preparing a polyacrylonitrile polymer solution and passing said solution through an extruder plate that determines the formation of filaments, a central chamber being defined between the extruder plate and a floating plate connected to a vibrating system, said chamber being surrounded by a peripheral chamber into which the polymer solution is introduced under pressure. The polymer solution then passes through to the central chamber via small radial conduits that accelerate the material, and is subjected to vibration in the central chamber before passing through the extruder plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.