초록 ▼

To a constitutive element of a tobacco (a leaf-tobacco component or a filter) is added a proanthocyanidin or a proanthocyanidin-carrying porous material (such as an active carbon) to obtain an element for tobacco smoke. The proanthocyanidin may be at least one extract selected from a grape seed or p

To a constitutive element of a tobacco (a leaf-tobacco component or a filter) is added a proanthocyanidin or a proanthocyanidin-carrying porous material (such as an active carbon) to obtain an element for tobacco smoke. The proanthocyanidin may be at least one extract selected from a grape seed or pip, a grape rind or pericarp and squeezed dregs of a grape fruit.

대표청구항 ▼

The invention claimed is: 1. A cigarette filter comprising a grape proanthocyanidin, wherein at least 70% by weight of the grape proanthocyanidin has a molecular weight of 5,000 g/mol or more. 2. The cigarette filter according to claim 1, wherein the proanthocyanidin is represented by the followi

The invention claimed is: 1. A cigarette filter comprising a grape proanthocyanidin, wherein at least 70% by weight of the grape proanthocyanidin has a molecular weight of 5,000 g/mol or more. 2. The cigarette filter according to claim 1, wherein the proanthocyanidin is represented by the following formula (I): wherein R1 represents hydrogen atom or hydroxyl group; R2a, R2b, R4a and R4b each independently represents hydrogen atom, hydroxyl group or a C1-4 alkoxy group; R3a and R3b each independently represents hydroxyl group or a C1-4 alkoxy group; R5a, R5b, R6a and R6b each independently represents hydrogen atom or an ester residue; and n represents an integer of not less than 1. 3. The cigarette filter according to claim 2, wherein, in the formula (I), R1 represents hydrogen atom; R2a, R2b, R4a and R4b each independently represents hydrogen atom, hydroxyl group or methoxy group; R3a and R3b each independently represents hydroxyl group or methoxy group; and R5a, R5b, R6a and R6b each independently represents hydrogen atom, galloyl group or a glycopyranosyl group. 4. The cigarette filter according to claim 1, which comprises a porous material supporting or carrying the proanthocyanidin. 5. The cigarette filter according to claim 4, wherein the porous material comprises an active carbon. 6. The cigarette filter according to claim 4, wherein 0.1 to 50 parts by weight of the proanthocyanidin is supported or carried on 100 parts by weight of the porous material. 7. The cigarette filter according to claim 1, wherein the proanthocyanidin comprises an extract from at least one member selected a grape seed or pip, a grape rind or pericarp and squeezed dregs of a grape fruit. 8. The cigarette filter according to claim 1, wherein the content of the proanthocyanidin is 0.1 to 50 parts by weight relative to 100 parts by weight of the cigarette filter. 9. The cigarette filter according to claim 1, wherein an amount of a proanthocyanidin-carrying porous material is 0.1 to 25 parts by weight in terms of a proanthocyanidin relative to 100 parts by weight of the cigarette filter. 10. The cigarette filter according to claim 1, wherein an efficiency of capturing a radical in tobacco smoke is 30% or more when tobacco smoke is passed through the cigarette filter at a rate of air flow of 17.5 ml/second. 11. The cigarette filter according to claim 1, wherein the cigarette filter comprises at least one member selected from the group consisting of a cellulose fiber, a cellulose ester fiber and a polypropylene fiber. 12. The cigarette filter according to claim 1, wherein the cigarette filter comprises a cellulose acetate fiber. 13. A method for reducing or eliminating a tar component and/or a free radical component from tobacco smoke, said method comprising: bringing the tobacco smoke into contact with a grape proanthocyanidin, wherein at least 70% by weight of the grape proanthocyanidin has a molecular weight of 5,000 g/mol or more. 14. The cigarette filter according to claim 1, wherein a ratio of eliminating tar relative to nicotine in tobacco smoke (filtration rate of tar/filtration rate of nicotine) is not less than 1.2.