Variable-ventilation filter tip and cigarette

Abstract

The invention discloses a variable-ventilation filter tip and a cigarette. The filter tip includes a filter element and a coating layer. The coating layer wraps the filter element. The filter element includes a smoke inlet end and a smoke release end. A phase-change ventilation area and a non-phase-change ventilation area are arranged on the coating layer, a plurality of first ventilation holes are arranged in the phase-change ventilation area, and a plurality of second ventilation holes are arranged in the non-phase-change ventilation area. Outside air penetrates through the coating layer through the first ventilation holes and the second ventilation holes to enter a part of the filter element. A part in the filter element close to the smoke inlet end is provided with a starch tube. A phase-change material is filled in the first ventilation hole. A phase-change temperature of the phase-change material ranges from 45° C. to 60° C.

1 . A variable-ventilation filter tip, comprising a filter element and a coating layer, wherein the coating layer wraps the filter element; and the filter element comprises a smoke inlet end and a smoke release end;
 a phase-change ventilation area and a non-phase-change ventilation area are arranged on the coating layer, a plurality of first ventilation holes are arranged in the phase-change ventilation area, and a plurality of second ventilation holes are arranged in the non-phase-change ventilation area;   outside air passes through the coating layer through the first ventilation holes and the second ventilation holes respectively to penetrate into a part of the filter element;   a phase-change material is filled in the first ventilation hole;   a part in the filter element close to the smoke inlet end is provided with a starch tube; and   a phase-change temperature of the phase-change material ranges from 45° C. to 60° C.   
     
     
         2 . The variable-ventilation filter tip according to  claim 1 , wherein the phase-change ventilation area is close to the smoke inlet end. 
     
     
         3 . The variable-ventilation filter tip according to  claim 2 , wherein a distance between the phase-change ventilation area and the smoke inlet end is not less than a distance between the phase-change ventilation area and the non-phase-change ventilation area. 
     
     
         4 . The variable-ventilation filter tip according to  claim 3 , wherein the phase-change temperature of the phase-change material ranges from 55° C. to 60° C. 
     
     
         5 . The variable-ventilation filter tip according to  claim 1 , wherein the non-phase-change ventilation area is close to the smoke inlet end. 
     
     
         6 . The variable-ventilation filter tip according to  claim 5 , wherein a distance between the non-phase-change ventilation area and the smoke inlet end is no less than a distance between the phase-change ventilation area and the non-phase-change ventilation area. 
     
     
         7 . The variable-ventilation filter tip according to  claim 6 , wherein the phase-change temperature of the phase-change material ranges from 45° C. to 55° C. 
     
     
         8 . The variable-ventilation filter tip according to  claim 2 , wherein the phase-change ventilation area is located on the starch tube. 
     
     
         9 . The variable-ventilation filter tip according to  claim 1 , wherein when only the second ventilation holes are ventilated, a total ventilation rate of a cigarette ranges from 40% to 60%; and when the first ventilation holes and the second ventilation holes are ventilated at the same time, the total ventilation rate of the cigarette is not lower than 70%. 
     
     
         10 . A cigarette, comprising the variable-ventilation filter tip according to  claim 1 . 
     
     
         11 . The variable-ventilation filter tip according to  claim 2 , wherein when only the second ventilation holes are ventilated, a total ventilation rate of a cigarette ranges from 40% to 60%; and when the first ventilation holes and the second ventilation holes are ventilated at the same time, the total ventilation rate of the cigarette is no lower than 70%. 
     
     
         12 . The variable-ventilation filter tip according to  claim 5 , wherein when only the second ventilation holes are ventilated, a total ventilation rate of a cigarette ranges from 40% to 60%; and when the first ventilation holes and the second ventilation holes are ventilated at the same time, the total ventilation rate of the cigarette is no lower than 70%. 
     
     
         13 . A cigarette, comprising the variable-ventilation filter tip according to  claim 2 . 
     
     
         14 . A cigarette, comprising the variable-ventilation filter tip according to  claim 3 . 
     
     
         15 . A cigarette, comprising the variable-ventilation filter tip according to  claim 4 . 
     
     
         16 . A cigarette, comprising the variable-ventilation filter tip according to  claim 5 . 
     
     
         17 . A cigarette, comprising the variable-ventilation filter tip according to  claim 6 . 
     
     
         18 . A cigarette, comprising the variable-ventilation filter tip according to  claim 7 . 
     
     
         19 . A cigarette, comprising the variable-ventilation filter tip according to  claim 8 . 
     
     
         20 . A cigarette, comprising the variable-ventilation filter tip according to  claim 9 .