Polyolefin-containing extrudable compositions and methods for their formation into elastomeric products including microfibers
US4663220A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1985 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Jul 30, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/68
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The disclosure is generally directed to an extrudable elastomeric composition formed by blending from at least 10 percent, by weight, of an A-B-A' block copolymer where "A" and "A'" are each a thermoplastic endblock which includes a styrenic moiety and where "B" is an elastomeric poly(ethylene-butylene) midblock with up to at least about 90 percent, by weight, of at least one polyolefin which, when blended with the A-B-A' block copolymer and subjected to an effective combination of elevated temperature and elevated pressure conditions, is adapted to be extruded in blended form, with the A-B-A' block copolymer. Fibrous nonwoven elastomeric webs may be formed from the extrudable composition and processes for forming the fibrous nonwoven elastomeric webs are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.