发明名称 |
ZIGARETTENFILTER UND VERFAHREN ZU SEINER HERSTELLUNG |
摘要 |
A rod-form body of smoke filtration material, preferably fibrous or filamentary, is wrapped in a fibrous or filamentary plugwrap comprising at least 50% by weight of fibres or filaments of thermoplastics material. The plugwrap may have premeability for air of not less than 10,000 Coresta units. The majority, suitably at least 80% by weight, of the material of the rod-form body is a material other than the said themoplastics material of the plugwrap. Thus the smoke-filtration material may comprise crimped polypropylene tow and the plugwrap be composed substantially wholly of fibrous cellulose acetate or conversely. Portions of such filter rod may be subjected to a hot-shaping process to provide grooved filter elements. |
申请公布号 |
DE3032478(A1) |
申请公布日期 |
1981.06.25 |
申请号 |
DE19803032478 |
申请日期 |
1980.08.28 |
申请人 |
BRITISH-AMERICAN TOBACCO CO.LTD. |
发明人 |
GEORGE HORSEWELL,HENRY;ANTHONY LUKE,JOHN |
分类号 |
A24D3/02;A24D3/04;A24D3/08;A24D3/10 |
主分类号 |
A24D3/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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