Method of manufacturing a foam fibrillated fibrous web from an isotactic polypropylene, polystyrene and .alpha.-methylstrene blend
US3969472A · kind A · utility
19Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1973 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Nov 15, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24074
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Non-woven fabrics are produced from oriented foam fibrillated webs contaning 50 to 98 wt. % polypropylene and 2 to 50 wt. % polystyrene. The webs are assembled in a plurality of layers and then bonded by heat and pressure either with or without the presence of an adhesive. In a preferred aspect films especially of polyethylene or ethylenevinyl acetate copolymers are used as the bonding agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.