Reduced basis weight cigarette paper
AssigneeSchweitzer-Mauduit International, Inc.
InventorVladimir Hampl, Jr.
Life of this patent
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Abstract
The present invention is generally directed to low weight cigarette wrapping papers. In particular, the wrapping papers, although having a low basis weight, have an opacity of at least 70% and a tensile strength comparable with conventional papers. Wrapping papers made according to the present invention contain a white pigment having a medium particle size of from 0.1 microns to about 0.5 microns. In one embodiment, a black pigment can also be combined with the white pigment in small amounts.
Claims32
A wrapping paper for a smoking article comprising:
- a paper substrate containing a filler, said filler comprising a white pigment having a median particle size of from about 0.1 microns to about 0.5 microns, said wrapping paper having an opacity of at least 80% and a brightness of at least 70% and a basis weight of up to about 22 gsm, wherein said paper has a tensile strength of at least about 1800 g/29 mm.
A method for making a wrapping paper for a smoking article having a reduced basis weight comprising the steps of:
- incorporating into a paper substrate a filler comprising a white pigment, said white pigment having a median particle size of from about 0.1 microns to about 0.5 microns, said white pigment being added to said paper substrate in an amount from about 15% to about 35% by weight;
- and
- wherein said white pigment is added to said wrapping paper in an amount sufficient to increase the opacity of said wrapping paper up to at least about 70%, while maintaining the basis weight of said wrapping paper below about 22 gsm, wherein said paper has a tensile strength of at least about 1800 g/29 mm.
A smoking article comprising:
- a column of a smokable filler;
- and
- a wrapping paper surrounding said column of said smokable filler, said wrapping paper comprising a paper substrate containing calcium carbonate, titanium dioxide, or mixtures thereof having a median particle size of from about 0.2 microns to about 0.4 microns, said wrapping paper having a basis weight of up to about 22 gsm, a permeability of from about 15 Coresta units to about 55 Coresta units, a total filler content of from about 15% to about 35% by weight, and an opacity of at least about 70%, wherein said paper has a tensile strength of at least about 1800 g/29 mm.
Dependencies are inferred from the claim text.