Device for biaxially-oriented stretching polytetrafluoroethylene hollow fiber membranes and method thereof
US10293537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2014 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Sep 27, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2022/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present disclosure discloses a device for biaxially-oriented stretching polytetrafluoroethylene hollow fiber membranes and the method thereof. The device may include a lubricant removing oven and a tube blank heating oven mounted at the outlet end of the push-compression mold, a core extension extending from the core into the lubricant removing oven and the tube blank heating oven, and a speed regulating guide wheel mounted at the outlet of the tube blank heating oven. A tube blank is extruded from a push-compression machine, inserted on the core extension for removal of lubricant in the lubricant removing oven, heated in the tube blank heating oven, transversely stretched by means of the bulked core, and then wound onto the speed regulating guide wheel for longitudinal stretching. Both transverse and longitudinal stretching can be realized for polytetrafluoroethylene tube blanks, overcoming disadvantages of traditional processing devices that can merely perform longitudinal stretching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.