Cigarette mainstream smoke component adsorbent and cigarette filter

Patent metadata

Field	Value
Publication number	US-9486011-B2
Application number	US-201414249058-A
Country	US
Kind code	B2
Filing date	Apr 9, 2014
Priority date	Mar 18, 2008
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

The present invention provides a cigarette mainstream smoke component adsorbent including particulate activated carbon, and a glucan film supported by the particulate activated carbon. Also, the present invention provides a cigarette filter including the cigarette mainstream smoke component adsorbent.

First claim

What is claimed:

1. A cigarette which contains a smoking substance having a flavorant and a cigarette filter, said cigarette filter comprising:
a cigarette mainstream smoke component adsorbent which consists of:
activated carbon particles having pores, the pores opening at a surface of the activated carbon particles, and
an airtight and water-soluble pullulan film which covers the entire surface of the activated carbon particles without infiltrating the pores of the activated carbon particles, to thereby enclose said pores,

the pullulan film being such that it suppresses adsorption of the flavorant contained in the smoking substance by the activated carbon prior to smoking, and it dissolves and detaches from the activated carbon when the cigarette filter is brought into contact with cigarette mainstream smoke generated from the cigarette due to the presence of moisture and other polar components, so that the adsorption function of the activated carbon can be exerted, thereby attaining the adsorption of gas components contained in the cigarette mainstream smoke.

2. The cigarette of claim 1 , wherein the pullulan film contains a softening agent.

3. The cigarette of claim 1 , wherein the pullulan film contains 0.1 to 3% by weight of a softening agent, based on the weight of the pullulan.

4. The cigarette of claim 1 , wherein the pullulan film contains a colorant other than black colorants.

5. The cigarette of claim 1 , wherein the pullulan film contains 0.1 to 1% by weight of a colorant other than black colorants, based on the weight of the pullulan.

6. The cigarette of claim 1 , wherein the cigarette mainstream smoke component adsorbent contains 0.1 to 10% by weight of pullulan, based on the total weight of the adsorbent.

7. The cigarette of claim 1 , wherein the cigarette mainstream smoke component adsorbent is dispersed in the filter material of the cigarette filter.

8. The cigarette of claim 1 , wherein the filter consists of two filter sections provided spaced apart from each other, and the space between the two filter sections is filled with the cigarette mainstream smoke component adsorbent.

Assignees

• Japan Tobacco Inc

Inventors

• Chida Masahiro
• Nakagawa Yasuhiro
• Misawa Katsuhito
• Kasakura Yayoi

Classifications

• B01J20/3204

  Inorganic carriers, supports or substrates · CPC title

• B01J20/3274

  Proteins, nucleic acids, polysaccharides, antibodies or antigens · CPC title

• B01J20/28066

  being more than 1000 m2/g · CPC title

• A24D3/163 Primary

  Carbon · CPC title

• A24D3/08 Primary

  of organic materials as carrier or major constituent (of ion exchange materials A24D3/12) · CPC title