Production of a film-like or fibrous structure of an aromatic polyester
US4517315A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1982 |
| Grant date | May 14, 1985 |
| Priority date | — |
| Expiry date | Jan 18, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/13
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for producing a film-like or fibrous structure of an aromatic polyester, which comprises PA1 (1) forming an unstretched film-like or fibrous structure by melt-shaping a blend comprising 100 parts by weight of (A) an aromatic polyester having a high degree of polymerization derived from an aromatic dicarboxylic acid as a main acid component and an aliphatic diol and/or an alicyclic diol as a main glycol component and (B) 3 to 300 parts by weight of a low-molecular-weight compound being substantially non-reactive with the aromatic polyester (A) and having a boiling point of at least about 200.degree. C. under atmospheric pressure and a molecular weight of not more than 1,000, PA1 (2) stretching the resulting film-like or fibrous structure, PA1 (3) extracting at least a major portion of the low-molecular-weight compound from the stretched film-like or fibrous structure by using an organic solvent which does not substantially dissolve the aromatic polyester under the extracting conditions, and PA1 (4) if desired, heat-setting the film-like or fibrous structure after the stretching step (2) and/or the extracting step (3). The film-like or fibrous structure of an aromatic polye…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.