Aerosol-generating article and aerosol-generating systems

Patent metadata

Field	Value
Publication number	US-11944118-B2
Application number	US-201917265705-A
Country	US
Kind code	B2
Filing date	Nov 13, 2019
Priority date	Nov 23, 2018
Publication date	Apr 2, 2024
Grant date	Apr 2, 2024

Abstract

Provided is an aerosol-generating article including a wrapper which is discolored as the aerosol-generating material is heated, the aerosol-generating article including: a tobacco rod; a front-end plug arranged on a side of the tobacco rod; a filter rod arranged on the other side of the tobacco rod; and the wrapper surrounding the tobacco rod, the front-end plug, and the filter rod, wherein the wrapper includes a thermochromic material which is heated and discolored by an aerosol-generating device when the aerosol-generating article is inserted into the aerosol-generating device.

First claim

The invention claimed is:

1. An aerosol-generating article comprising:
a tobacco rod;
a front-end plug arranged on a side of the tobacco rod;
a filter rod arranged on the other side of the tobacco rod; and
a wrapper surrounding the tobacco rod, the front-end plug, and the filter rod, wherein
the wrapper comprises at least one thermochromic material that is configured to be heated and discolored by an aerosol-generating device when the aerosol-generating article is inserted into the aerosol-generating device,
wherein the wrapper further comprises:
an inner wrapper surrounding at least one from among the tobacco rod, the front-end plug, and the filter rod; and
an outer wrapper surrounding the inner wrapper,

wherein the at least one thermochromic material is included in the inner wrapper, and
wherein at least a portion of the outer wrapper, that overlaps the at least one thermochromic material, is made of a semitransparent or transparent material.

2. The aerosol-generating article of claim 1 , wherein
the wrapper comprises a first area located on a circumference of the front-end plug, a second area located on a circumference of the tobacco rod, and a third area located on a circumference of the filter rod, and
the at least one thermochromic material is included in at least one from among the first area, the second area, and the third area.

3. The aerosol-generating article of claim 1 , wherein the at least one thermochromic material is configured to be discolored within a temperature range of 50° C. to 300° C. when heated by the aerosol-generating device.

4. The aerosol-generating article of claim 1 , wherein the at least one thermochromic material is configured to be discolored after 1 minute to 10 minutes have elapsed from when the at least one thermochromic material starts to be heated by the aerosol-generating device.

5. The aerosol-generating article of claim 1 , wherein
the at least one thermochromic material comprises a plurality of thermochromic elements, and
the plurality of thermochromic material comprises a first thermochromic element and a second thermochromic element that are configured to be discolored at different temperatures or different elapsed heating times with respect to each other.

6. The aerosol-generating article of claim 1 , wherein the at least one thermochromic material comprises at least one of from among a cellulose-based material, a starch-based material, a polyamide-based material, an organic acid, and a pigment.

7. The aerosol-generating article of claim 1 , wherein the at least one thermochromic material is coated or printed on the wrapper.

8. The aerosol-generating article of claim 1 , wherein the at least one thermochromic material is included in an amount less than or equal to 10 wt % in the wrapper.

9. An aerosol-generating system comprising:
an aerosol-generating article; and
an aerosol-generating device into which the aerosol-generating article is configured to be inserted,
wherein the aerosol-generating device comprises a battery and a heater which is configured to be heated by power supplied from the battery; and
wherein the aerosol-generating article comprises:
a tobacco rod,
a front-end plug arranged on one side of the tobacco rod,
a filter rod arranged on another side of the tobacco rod, opposite to the one side, and
a wrapper surrounding the tobacco rod, the front-end plug, and the filter rod,

wherein the wrapper comprises at least one thermochromic material that is configured to be heated and discolored by the aerosol-generating device when the aerosol-generating article is inserted into the aerosol-generating device,
wherein the wrapper further comprises:
an inner wrapper surrounding at least one from among the tobacco rod, the front-end plug, and the filter rod; and
an outer wrapper surrounding the inner wrapper,

wherein the at least one thermochromic material is included in the inner wrapper, and
wherein at least a portion of the outer wrapper, that overlaps the at least one thermochromic material, is made of a semitransparent or transparent material.

10. The aerosol-generating system of claim 9 , wherein
the heater is configured to change a temperature for heating the aerosol-generating article from a first temperature to a second temperature, according to a number of puffs by a user, and,
as the temperature is changed from the first temperature to the second temperature, the wrapper is configured to be changed to different colors.

11. The aerosol-generating system of claim 10 , wherein the first temperature is a temperature higher than the second temperature.

Assignees

• Kt & G Corp

Inventors

• Cheong Bong Su
• Ko Dong Kyun
• Noh Jae Sung
• Choi Sang Won
• Hwang Jung Seop

Classifications

• A24D1/025 Primary

  the covers having material applied to defined areas, e.g. bands for reducing the ignition propensity · CPC title

• A24D1/20 Primary

  Cigarettes specially adapted for simulated smoking devices · CPC title

• A24D3/17

  Filters specially adapted for simulated smoking devices · CPC title

• A24D1/02

  with special covers · CPC title

• A24D1/08

  with lighting means · CPC title