Method of manufacturing tobacco raw material and oral tobacco product

Patent metadata

Field	Value
Publication number	US-10405570-B2
Application number	US-201715447921-A
Country	US
Kind code	B2
Filing date	Mar 2, 2017
Priority date	Sep 18, 2014
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

Provided is a method of manufacturing a tobacco raw material in which the green color of the tobacco raw material is maintained and a browning-involved enzyme included in tobacco leaves is deactivated. Specifically, a method of manufacturing a tobacco raw material is provided that includes a step for heating a tobacco leaf material, which has an a* value of 1.0 or less, the a* value being expressed by the L*a*b* method, and which has a moisture content of 8 wt % or less, at a temperature of 75° C. or higher and under a humidity-controlled environment so that the a* value is 1.0 or less and the content of the browning-involved enzyme is 0.1 U/g or less.

First claim

The invention claimed is:

1. A method for manufacturing a tobacco material, comprising: heating a tobacco leaf material having an a* value of 1.0 or less expressed according to the L*a*b* method and having a moisture content of 8 weight % or less, at a temperature of 75° C. or higher and in a humidity-controlled environment, such that said a* value is 1.0 or less and activity of an enzyme eliciting enzymatic browning is 0.1 U/g or less.

2. The manufacturing method of claim 1 , wherein said humidity-controlled environment is an environment at 3% RH to 60% RH.

3. The manufacturing method of claim 1 , wherein said humidity-controlled environment is an environment in which relative humidity is kept substantially constant between 3% RH and 60% RH.

4. The manufacturing method of claim 1 , wherein the temperature in said step of heating is 99° C. or lower.

Assignees

• Japan Tobacco Inc

Inventors

• Nagai Atsushi
• Kobayashi Kei
• Chida Hiroyuki
• Mori Kazuo
• Otaki Hiroshi

Classifications

• A24B3/12

  Steaming, curing, or flavouring tobacco · CPC title

• A24B1/02

  Arrangements in barns for preparatory treatment of the tobacco, e.g. with devices for drying · CPC title

• A24B13/00

  Tobacco for pipes, for cigars, e.g. cigar inserts, or for cigarettes; Chewing tobacco; Snuff (reconstituted tobacco products A24B3/14) · CPC title

• A24B3/04 Primary

  Humidifying or drying tobacco bunches or cut tobacco (A24B3/12 takes precedence) · CPC title

• A24B15/10

  Chemical features of tobacco products or tobacco substitutes · CPC title