Segmented smoking article with insulation mat

1. A cigarette comprising:

a lighting end and a mouth end;

a smokable segment disposed at the lighting end, said smokable segment having a length and comprising a smokable material circumscribed by wrapping material;

a mouth end piece segment disposed at the mouth end;

an aerosol-generation system disposed between the smokable segment and the mouth end piece segment, the aerosol-generation system including

(i) a heat generation segment adjacent to the smokable segment, said heat generation segment having a length and including a heat source configured to be activated by combustion of the smokable material and an insulation Layer of flame-retardant material that comprises non-glass viscose rayon material that is woven, knit or a combination thereof, and . . .

(ii) an aerosol-generating segment incorporating aerosol-forming material, said aerosol-generating segment having a length and being disposed between, but physically separate from, each of the heat generation segment and the mouth end;

a piece of outer wrapping material oriented to provide an overwrap (i) around the aerosol-generating segment for at least a portion of its length, (ii) around the heat generation segment for the length of that segment, and (iii) around the smokable segment for at least a portion of its length; those segments being connected together by the overwrap to provide a cigarette rod; and

the mouth end piece segment being connected to the cigarette rod using tipping material.

2. The cigarette of claim 1 , wherein the flame retardant material further comprises a material that is selected from, stainless steel fibers . . . or any combination thereof.

3. The cigarette of claim 1 , wherein the heat generation segment and the aerosol-generating segment are in a heat exchange relationship with one another and the insulation provides an insulative layer about at least a portion of the heat source.

4. The cigarette of claim 1 , wherein the insulation layer comprises a woven layer of a non-glass material.

5. The cigarette of claim 1 , wherein the insulation layer further comprises carbon fibers containing at least 95% carbon.

6. The cigarette of claim 1 , further comprising a buffer between the heat generation segment and the aerosol-generating segment, wherein the buffer further comprises a structure selected from a group consisting of:

open air space;

non-glass material that is woven, knit, or a combination thereof;

a foamed metal material;

a foamed ceramic material;

a foamed ceramic metal composite; and

any combination thereof.

7. The cigarette of claim 1 , wherein the insulation layer further comprises rayon fibers treated with silica.

8. The cigarette of claim 1 , wherein the insulation layer further comprises cellulose fibers.

9. The cigarette of claim 1 , wherein the insulation layer comprises a woven-knit hybrid material.

10. The cigarette of claim 1 , wherein the insulation layer further comprises a selected one of metalized fibers, metallic fibers, or a combination thereof.

11. The cigarette of claim 1 , wherein the heat source comprises a foamed structure comprising carbon.

12. A cigarette comprising:

a lighting end and a mouth end;

a mouth end piece segment disposed at the mouth end;

an aerosol-generation system disposed near the lighting end, the aerosol-generation system including

(i) heat generation segment having a length . . . and including a heat source configured to be activated by combustion of the smokable material and an insulation layer of flame-retardant material that comprises a material selected from a group consisting of:

non-glass viscose rayon material that is woven, knit, or a combination thereof;

a foamed metal material;

a foamed ceramic material; and

a foamed ceramic metal composite, and

(ii) an aerosol-generating segment incorporating aerosol-forming material, said aerosol-generating segment having a length and being disposed between, but physically separate from, each of the heat generation segment and the mouth end; and

a single piece of outer wrapping material oriented to provide an overwrap (i) around the mouth end piece segment for the length of that segment, (ii) around the aerosol-generating segment for the length of that segment, and (iii) around the heat generation segment for at least a portion of its length.

13. The cigarette of claim 12 , wherein the length of the heat generation segment is less than about 30 mm, and the heat source comprises a carbonaceous fuel element.

14. The cigarette of claim 12 , wherein the aerosol-generating segment comprises glycerin, propylene glycol or combinations thereof.

15. The cigarette of claim 12 , wherein the heat generation segment and the aerosol-generating segment are in a heat exchange relationship with one another.

16. The cigarette of claim 12 , wherein the insulation layer further comprises carbon fibers containing at least 95% carbon.

17. The cigarette of claim 12 , further comprising a buffer between the heat generation segment and the aerosol-generating segment, wherein the buffer comprises a structure selected from a group consisting of:

open air space;

non-glass material that is woven, knit, or a combination thereof;

a foamed metal material;

a foamed ceramic material;

a foamed ceramic metal composite; and

any combination thereof.

18. The cigarette of claim 12 , wherein the insulation layer further comprises rayon fibers treated with silica.

19. The cigarette of claim 12 , wherein the insulation layer further comprises cellulose fibers.

20. The cigarette of claim 12 , wherein the insulation layer comprises a woven-knit hybrid material.

21. The cigarette of claim 12 , wherein the insulation layer further comprises a selected one of metalized fibers, metallic fibers, or a combination thereof.

22. The cigarette of claim 12 , wherein the heat source comprises a foamed structure comprising carbon.

23. The cigarette of claim 12 , wherein the aerosol-generating segment includes tobacco.