Photodegradable paper and its use
A photodegradable paper including cellulose fibers and, if applicable, fillers, additives and/or other kind of fibers is described. Also described, is a paper particularly in the field of packaging, tissue papers or cigarettes.
1. A photodegradable paper comprising cellulosic fibers and, optionally, additives, wherein the photodegradable paper comprises a carbon modified titanium dioxide, wherein the carbon is located within and/or on the surface of the carbon-modified titanium dioxide, and the carbon-modified titanium dioxide is distributed between the fibers of the photodegradable paper; and wherein the carbon modified titanium dioxide has, in contrast to not-modified titanium dioxide, a significant light absorption in the range of λ>=400 nm; and wherein the content of carbon modified titanium dioxide within the photodegradable paper is in the range of 0.5 wt % to 40 wt %.
2. The photodegradable paper as defined in claim 1 , wherein the cellulosic fibers originate from a source selected from the group consisting of wood, lignocellulose, mechanical pulp, waste paper, fiber crop or a mixture of two or more of them.
3. The photodegradable paper as defined by claim 1 , wherein the carbon modified titanium dioxide is carbon modified at its surface.
4. The photodegradable paper as defined by claim 1 , wherein the carbon modified titanium dioxide has a crystallite size of 5 nm to 150 nm.
5. The photodegradable paper as defined by claim 1 , wherein the carbon modified titanium dioxide has a density (ISO 787, part 10) of 3.0 g/cm 3 to 5.0 g/cm 3 .
6. The photodegradable paper as defined by claim 1 , wherein the carbon modified titanium dioxide has a specific surface (BET) greater than 100 m 2 /g.
7. The photodegradable paper as defined by claim 1 , wherein the carbon content of the carbon modified titanium dioxide is in the range of 0.05 wt % to 5 wt %.
8. The photodegradable paper as defined by claim 1 , wherein the photodegradable paper is at least one part of a packaging material.
9. The photodegradable paper as defined by claim 1 , wherein it is a paper tissue.
10. The photodegradable paper as defined by claim 4 , wherein the carbon modified titanium dioxide has crystallite size of from 7 nm to 25 nm.
11. The photodegradable paper as defined by claim 4 , wherein the carbon modified titanium dioxide has a density of 3.5 g/cm 3 to 4.2g/cm 3 .
12. The photodegradable paper as defined by claim 6 , wherein the carbon modified titanium dioxide has a specific surface (BET) greater than 250 m 2 /g.
13. The photodegradable paper as defined by claim 7 , wherein the carbon content of the carbon modified titanium dioxide is in the range of 0.3 wt % to 1.5 wt %.
14. The photodegradable paper as defined by claim 1 , wherein the content of carbon modified titanium dioxide within the photodegradable paper is in the range of 2 wt % to 25 wt %
15. The photodegradable paper as defined by claim 8 , wherein the packaging material is a food packaging material.
16. A cigarette comprising the photodegradable paper as defined by claim 1 .
17. The cigarette as defined by claim 16 , wherein the paper is a cigarette paper, a plug wrap and/or a tipping.
18. The cigarette as defined by claim 17 , wherein the filter material of the cigarette also comprises a carbon modified titanium dioxide.