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Method for reducing viscosity of flame retardant glue for low ignition propensity (LIP) cigarette paper

A low ignition tendency, cigarette paper technology, used in papermaking, textiles and papermaking, fiber raw material processing, etc., can solve the problems of increased LIP glue viscosity, unfavorable use of flexo printing technology, etc., and reduce the risk of ignition of combustibles. Possibility, low price, effect of reducing ignition tendency

Active Publication Date: 2012-06-27
YUNNAN RES INST OF TOBACCO SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the amount of starch added increases, the viscosity of LIP glue will increase significantly, which is not conducive to the use of flexo printing technology.

Method used

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  • Method for reducing viscosity of flame retardant glue for low ignition propensity (LIP) cigarette paper
  • Method for reducing viscosity of flame retardant glue for low ignition propensity (LIP) cigarette paper
  • Method for reducing viscosity of flame retardant glue for low ignition propensity (LIP) cigarette paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Before industrial use, propylene glycol and sodium hydroxide are directly added to the LIP glue containing high concentration of starch. The amount of propylene glycol added is: starch: propylene glycol = 1:1.25, and the amount of strong alkali added is: starch: strong alkali = 10: 1. Stir well and set aside. Add an appropriate amount of pure phosphoric acid within 5 minutes before use and shake well to ensure that the remaining amount of sodium hydroxide after the reaction is 24.6% of the original amount added.

Embodiment 2

[0025] Before industrial use, propylene glycol and potassium hydroxide are directly added to the LIP glue containing high concentration of starch. The amount of propylene glycol added is: starch: propylene glycol = 1:1, and the amount of potassium hydroxide added is: starch: strong alkali = 10 :0.75, stir well and set aside. Add an appropriate amount of formic acid and shake well within 5 minutes before use to ensure that the remaining potassium hydroxide remaining after the reaction is 15.2% of the original added amount.

Embodiment 3

[0027] Before industrial use, directly add propylene glycol and sodium ethoxide to the LIP glue containing high concentration of starch. The amount of propylene glycol added is: starch: propylene glycol = 1:1, and the amount of sodium ethoxide added is: starch: strong alkali = 10:0.5 , stir well and set aside. Add an appropriate amount of dilute sulfuric acid within 5 minutes before use and shake well. The amount of dilute sulfuric acid added is determined by the concentration of dilute sulfuric acid to ensure that the remaining amount of sodium ethoxide after the reaction is 30% of the original amount added.

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Abstract

The invention relates to a method for reducing the viscosity of a flame retardant glue for low ignition propensity (LIP) cigarette paper. The flame retardant glue is characterized in that propylene glycol, strong alkali and a proper amount of acid are added into the LIP glue with high-concentration starch so as to greatly reduce the viscosity of the LIP glue, wherein the ratio of the starch to the added propylene glycol is 1:(0.75-1.5), the ratio of the starch to the added strong alkali is 10:(0.5-1.5), and the added acid ensures that the residual strong alkali after reaction is 15-35% of theoriginal amount of the added strong alkali. Before industrial use, an acid-alkali neutralization method is used to further reduce the pH value of the flame retardant glue, thus enabling the flame retardant flue to be suitable for the existing flexographic technology, protecting machine equipment, and meeting the viscosity requirements of instruments in the printing process at the same time.

Description

technical field [0001] The invention relates to the technical field of cigarettes, in particular to an additive for reducing the viscosity of flame-retardant glue used in making cigarette paper with low ignition tendency and an application method thereof. Background technique [0002] According to the fire statistics of the American Fire Protection Association for many years, the vast majority of catastrophic fires in the United States are caused by lit cigarettes falling on beds or decorative items, causing direct property losses of up to billions of dollars. The main purpose of proposing Low Ignition Propensity (LIP) cigarettes internationally is to reduce fire losses. [0003] The center temperature of the cigarette butt is as high as 800-900 o C, its surface temperature also has 300-400 o C, while the ignition point of general solid combustibles is at 200 o C or so. Therefore, when the smoker is inadvertent or asleep, when the unextinguished cigarette falls on clothe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/14
Inventor 何沛王笛刘志华缪明明刘春波王昆淼孙志勇陈永宽
Owner YUNNAN RES INST OF TOBACCO SCI