| 摘要 |
A composite particle comprising a cellulose acetate and at least one amino compound selected from the group consisting of an amino acid and an aminosulfonic acid (particularly a basic amino acid) is prepared. The amino compound may be supported on a particle of the cellulose acetate. The composite particle may have the following particle size: not less than 90% by weight of the composite particle pass through a sieve having an aperture size of 1.7 mm and fail to pass through a sieve having an aperture size of 0.10 mm, wherein these sieves are in accordance with JIS Z8801-1 2006. The ratio of the amino compound may be about 1 to 30 parts by weight relative to 100 parts by weight of the cellulose acetate. The composite particle and a cellulose ester tow may be combined to prepare a cigarette filter. The composite particle selectively and efficiently removes an aldehyde compound (e.g., formaldehyde) while maintaining a palatable component (e.g., nicotine and tar). |
