Smoke filtration

Details Smoke filtration Smoke filtration

1980-08-18

1982-12-21

Millin, V.

Tobacco

Smoke separator or treater

Having a polymer

131336, 131340, 131343, 131345, 131362, 131365, 131 95, A24D 302, A24D 306, A24D 318

Patent

active

043644031

ABSTRACT:
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.

REFERENCES:
patent: 3079978 (1963-03-01), Cobb, Jr. et al.
patent: 4135523 (1979-01-01), Luke
patent: 6034765 (1977-07-01), Van Hall

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