Soil-repellent monofilament for paper machine wire-cloths, production thereof and use thereof
US5472780A · kind A · utility
4Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1994 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Apr 29, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2969
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The soil-repellent monofilament for paper machine wire-cloths consists of at least 85% by weight of polyethylene terephthalate having a viscosity index (V.I.) of at least 96 dl/g and an added copolymer prepared from alkenes and perfluoroalkenes having a melting point from 255.degree. to 275.degree. C. To make the soil-repellent monofilament 1.5 to 5% by weight of tetrafluoroethylene is included by addition to the polymer melt of polyethylene terephthalate prior to extrusion. The soil-repellent monofilament produced by this method has a soiling index of <2 after 5 soiling and cleaning cycles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.