Spunbond cigarette filter
US5538019A · kind A · utility
23Cited by
46References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1993 |
| Grant date | Jul 23, 1996 |
| Priority date | — |
| Expiry date | Nov 3, 2013 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2509/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A filter made from a nonwoven spunbond web comprising a plurality of continuous intertwined filaments, each filament having a diameter of about 25 to about 100 microns, predominantly present in the web as loop springs having diameters of about 1 to 3 millimeters. The web is made from a plurality of spunbond filaments laid randomly onto a moving belt. The webs of the present invention find particular utility when formed into cylinders as filters for smoking articles. In the smoking articles, the filters of the invention have a desirable degree of firmness while demonstrating an acceptable pressure drop.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.