Hydrophobic rolling papers

Patent metadata

Field	Value
Publication number	US-10485264-B2
Application number	US-201515536010-A
Country	US
Kind code	B2
Filing date	Dec 16, 2015
Priority date	Dec 23, 2014
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A rolling paper includes a hydrophobic substrate region comprising hydrophobic groups covalently bonded to the rolling paper, and a moisture-activated adhesive adjacent to the hydrophobic substrate region and longitudinal edge of the rolling paper.

First claim

The invention claimed is:

1. A rolling paper comprising:
a hydrophobic substrate region comprising hydrophobic groups covalently bonded to the rolling paper; and
a moisture-activated adhesive applied onto the hydrophobic substrate region and adjacent a longitudinal edge of the rolling paper.

2. The rolling paper according to claim 1 , wherein the moisture-activated adhesive is disposed on only a portion of the hydrophobic substrate region.

3. The rolling paper according to claim 1 , wherein the moisture-activated adhesive, hydrophobic substrate region, and longitudinal edge are coextensive with each other and the moisture-activated adhesive separates at least a portion of the hydrophobic substrate region from the longitudinal edge.

4. The rolling paper according to claim 1 , wherein the hydrophobic substrate region has a water contact angle of at least about 90 degrees, or at least about 100 degrees.

5. The rolling paper according to claim 1 , wherein the hydrophobic substrate region exhibits a Cobb measurement value (at 60 seconds) of about 40 g/m 2 or less.

6. The rolling paper according to claim 1 , wherein the rolling paper has a basis weight in a range from about 10 to about 50 g/m 2 and the hydrophobic groups have a basis weight in a range from about 0.1 to about 5 g/m 2 .

7. The rolling paper according to claim 1 , wherein the rolling paper comprises cellulosic material and the hydrophobic groups are covalently bonded to cellulosic material by reacting in-situ a fatty acid halide with the cellulosic material.

8. A rolling paper according to claim 7 , wherein the fatty acid halide is palmitoyl chloride, stearoyl chloride, behenoyl chloride, or a mixture of palmitoyl chloride and stearoyl chloride.

9. The rolling paper according to claim 7 , wherein the rolling paper comprises fatty acid esters of cellulose.

10. The rolling paper according to claim 1 , wherein moisture-activated adhesive comprises water-remoistenable natural gums.

11. A rolling paper according to claim 1 , wherein the hydrophobic substrate region is produced by a process comprising the steps of: applying a liquid composition comprising a fatty acid halide to at least one surface of a rolling paper, maintaining the surface at a temperature of about 120° C. to about 180° C., wherein the fatty acid halide reacts in situ with protogenic groups of material in the rolling paper resulting in the formation of fatty acid esters.

12. A rolling paper according to claim 11 , wherein the process comprises applying a liquid composition comprising stearoyl chloride or palmitoyl chloride to at least one surface of a rolling paper at a temperature of about 120° C. to about 180° C., wherein hydroxyl groups in cellulosic material of the rolling paper reacts in-situ with the stearoyl chloride or palmitoyl chloride.

13. A rolling paper according to claim 11 , wherein the process comprises applying the liquid composition to a surface region of a rolling paper at a rate of in a range from about 0.1 to about 3 grams per square meter to render the surface region hydrophobic.

14. A rolling paper according to claim 11 , wherein the process comprises disposing the moisture-activated adhesive onto a portion of the hydrophobic substrate region.

15. A rolling paper according to claim 11 , wherein the process comprises applying a liquid composition comprising a fatty acid halide to a first major surface of a rolling paper, maintaining the first major surface at a temperature of about 120° C. to about 180° C., wherein the fatty acid halide reacts in situ with protogenic groups of material in the rolling paper resulting in the formation of fatty acid esters, and then applying the moisture-activated adhesive onto a second major surface of the rolling paper, wherein the second major surface opposes the first major surface.

16. A rolling paper according to claim 11 , wherein the formation of the fatty acid esters is a solvent-free process.

Assignees

• Philip Morris Products Sa

Inventors

• Slama Philippe
• Kadiric Alen

Classifications

• D21H17/00

  Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution · CPC title

• D21H5/16

  Tobacco or cigarette paper · CPC title

• C09J7/32

  Water-activated {adhesive}, e.g. for gummed paper · CPC title

• C09J7/21

  Paper; Textile fabrics · CPC title

• A24D1/022 Primary

  Papers for roll-your-own cigarettes · CPC title