Yarns and fibers good properties, based on atactic polyvinyl chloride, and process for the production
US4508778A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1983 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Aug 12, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2967
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to yarns and fibers based on atactic polyvinyl chloride. They possess a residual shrinkage in boiling water of less than 3%, a modulus of elasticity which is greater than or equal to 2 kN/mm.sup.2, an orientation index of the crystalline zones which is greater than or equal to 70%, an orientation index of the mesomorphic zones which is greater than or equal to 8%, and an orientation index of the amorphous zones which is greater than or equal to 5%. They are obtained by spinning and stretching in a known manner, then stabilization under tension at a temperature between 105.degree. and 130.degree. C., in the presence of steam under pressure, for 1 to 3 seconds, and then shrinkage in an aqueous fluid medium at a temperature between 98.degree. and 130.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.