Twine and method of forming same
US4091607A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jul 22, 1976 |
| Grant date | May 30, 1978 |
| Priority date | — |
| Expiry date | Jul 22, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/47
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
There is disclosed a process for making fibrous material which is particularly suitable for the manufacture of baler twine. The material is preferably made from polypropylene and is produced from film which is roll-embossed and fibrillated, the roll-embossing temperature being substantially lower than the conventional roll-embossing temperature. In the case of polypropylene film this is within the range 60.degree. C to 90.degree. C, preferably about 80.degree. C. As a result, the fibrous material has a high proportion of clusters of from 2 to 5 unseparated incipient filaments. Baler twine made from the material is economical to produce and has improved physical characteristics especially good strength combined with good knot retention ability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.