Aerosol-generating article having improved wrapper

1. A heat-not-burn article, comprising:

an aerosol-forming tobacco substrate; and

a wrapper circumscribing at least a part of the heat-not-burn article, the wrapper comprising a sulphide scavenger compound,

wherein the sulphide scavenger compound is a metal salt,

wherein the metal salt is a carbonate, chloride, sulphate, hydroxide, nitrate, malate, acetate, citrate, or bromide,

wherein the sulphide scavenger compound is based on a transition metal, and

wherein an amount of a metal component of the sulphide scavenger compound in the wrapper is between 0.01 percent and 5 percent by weight based on a total weight of the wrapper and the sulphide scavenger compound.

2. The heat-not-burn article according to claim 1 , wherein the sulphide scavenger compound is based on zinc or copper.

3. The heat-not-burn article according to claim 1 , wherein the wrapper comprises the sulphide scavenger compound combined with a polymeric binder.

4. The heat-not-burn article according to claim 1 , wherein an outer layer incorporating the sulphide scavenger compound is provided on at least one surface of the wrapper.

5. The heat-not-burn article according to claim 1 ,

wherein the wrapper is formed of a sheet of a fibrous material, and

wherein the sulphide scavenger compound is dispersed within the fibrous material.

6. The heat-not-burn article according to claim 1 , wherein the sulphide scavenger compound is impregnated into the wrapper.

7. The heat-not-burn article according to claim 1 , wherein an amount of a metal component of the sulphide scavenger compound in the wrapper is between 0.25 micrograms per square centimeter and 125 micrograms per square centimeter of the wrapper.

8. The heat-not-burn article according to claim 1 ,

wherein the sulphide scavenger compound in the wrapper provides a reduction of at least 50 percent by weight of hydrogen sulphide during a pre-heating test compared with an equivalent heat-not-burn article without the sulphide scavenger compound in the wrapper, and

wherein in the pre-heating test a heating element configured to heat the aerosol-forming substrate in the heat-not-burn article is programmed to heat at 350 degrees Celsius for 30 seconds and then to switch off.

9. The heat-not-burn article according to claim 1 , wherein the wrapper comprising the sulphide scavenger compound is an outer wrapper.

10. An aerosol-generating system, comprising:

an aerosol-generating device comprising a heating element; and

a heat-not-burn article for the aerosol-generating device, the heat-not-burn article being according to claim 1 .

11. A method for the production of a heat-not-burn article according to claim 1 , the method comprising:

providing an aerosol-forming tobacco substrate;

combining the aerosol-forming tobacco substrate with one or more components to form an aerosol-generating article; and

wrapping the heat-not-burn article with an outer wrapper, the outer wrapper comprising:

a sulphide scavenger compound,

wherein the sulphide scavenger compound is a metal salt,

wherein the metal salt is a carbonate, chloride, sulphate, hydroxide, nitrate, malate, acetate, citrate, or bromide,

wherein the sulphide scavenger compound is based on a transition metal, and

wherein an amount of a metal component of the sulphide scavenger compound in the wrapper is between 0.01 percent and 5 percent by weight based on a total weight of the wrapper and the sulphide scavenger compound.

12. The method according to claim 11 , wherein the outer wrapper comprises a sulphide scavenger compound based on a transition metal salt and is configured to reduce a level of hydrogen sulphide released during heating of the heat-not-burn article.