Method of producing tobacco filters
US5979460A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1998 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Jun 26, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/04
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A tobacco filter with a circumferential length of 17 to 27 mm is prepared by creping or embossing, with a roller of a temperature not lower than 100.degree. C., a sheet-like material comprising not less than 20% by weight of a cellulose ester component and having a web structure with a basis weight of 20 to 35 g/m.sup.2 and a density of 0.25 to 0.45 g/cm.sup.3, and wrapping up the creped or embossed material into a rod form. The cellulose ester component includes e.g. a cellulose ester short staple, a fibrillated fiber, an esterified fiber and a fiber coated with a cellulose ester. This tobacco filter shows a pressure drop of 200 to 500 mm WG, a firmness of 88% or more and a cross-sectional porosity of 2% or less provided that it has a circumferential length of 24.5 mm and a length of 10 cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.