Method of producing tobacco filters
AssigneeDaicel Chemical Industries, Ltd.
InventorHiroyuki Matsumura
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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.
Claims3
A method of producing a tobacco filter having a pressure drop of 200 to 500 mm water gauge, a firmness of not less than 88% and a cross-sectional porosity of not more than 2% as determined with a proviso that the filter has a circumferential length of 24.5.+-.0.2 mm and a length of 10.+-.0.2 cm, which comprises creeping or embossing a material in the form of a sheet comprising a cellulose ester component and wrapping up the creeped or embossed material into a rod form.
Dependencies are inferred from the claim text.