发明名称 |
Cigarette and cigarette filter |
摘要 |
Cigarettes have filter elements which have a relatively low efficiency for filtering particulate matter of tobacco smoke and a relatively high pressure drop. Such filter elements are provided by shredding, gathering or pleating a sheet-like web of a paper which has a low air permeability and exhibits a pH above about 9. The paper used to provide the filter material of the filter elements incorporates a magnesium hydroxide filter.
|
申请公布号 |
US5074320(A) |
申请公布日期 |
1991.12.24 |
申请号 |
US19890427547 |
申请日期 |
1989.10.26 |
申请人 |
R. J. REYNOLDS TOBACCO COMPANY |
发明人 |
JONES, JR., ELBERT C.;PERFETTI, THOMAS A. |
分类号 |
A24D3/16 |
主分类号 |
A24D3/16 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|