CN102174779A - Method for reducing viscosity of flame retardant glue for low ignition propensity (LIP) cigarette paper - Google Patents
Method for reducing viscosity of flame retardant glue for low ignition propensity (LIP) cigarette paper Download PDFInfo
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- CN102174779A CN102174779A CN 201110066396 CN201110066396A CN102174779A CN 102174779 A CN102174779 A CN 102174779A CN 201110066396 CN201110066396 CN 201110066396 CN 201110066396 A CN201110066396 A CN 201110066396A CN 102174779 A CN102174779 A CN 102174779A
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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 the original 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
The present invention relates to technical field of cigarettes, specifically a kind of additive and application process thereof that reduces the viscosity of making the used fire retardant glue of low ignition tendency cigarette paper.
Background technology
Show that according to National Fire Protection Association's fire statistics data for many years most calamitous fire all fall to causing that in bed or on the decorative article direct property loss that causes is up to tens dollars by lighting cigarette in the U.S..(Low Ignition Propensity, LIP) main purpose of cigarette is exactly in order to reduce the loss of fire to propose low ignition tendency in the world.
The central temperature of cigarette end is up to 800-900
oC, its surface temperature also has 300-400
oC, and the burning-point of general solid combustible is 200
oAbout C.Therefore, the smoker careless or sleeping in, when the cigarette that does not extinguish drops on clothes, furniture or the paper, just be very easy to cause fire.
New York, United States took the lead in having carried out cigarette fire safety standard in 2004, and in January, 2010, U.S.'s low ignition tendency cigarette occupation rate of market is expected to reach 100%; 2005, Canada required all cigarette at pin to be necessary for the fire safe cigarette; On April 1st, 2010 rose, and produced or import is the low ignition tendency cigarette to the cigarette of Finland in Finland; On November 29th, 2007,27 member states of European Union have ratified EU Committee and have required all cigarette of tobacco must use the suggestion of fire retardant papers, and the low ignition tendency cigarette is expected to and enters European Union in early days in mid-term in 2011 or 2012.In addition, the legislation about the cigarette fire safety is also being discussed by state such as New Zealand, South Africa.As seen, the cigarette of low ignition tendency has become the research focus of international tobacco circle of present stage.
At present domestic fewer for the painting method of LIP fire retardant glue on cigarette paper, what mainly still adopt is and the identical flexo technology of yew paper printing.And, generally all can in LIP glue, add a large amount of starch at present in order to strengthen the flame retardant effect of fire retardant glue.Along with the increase of starch addition, the viscosity of LIP glue can rise significantly, is unfavorable for the use of flexo technology.Therefore,, seek newly under the prerequisite that does not change amount of starch, reduce particularly important that the method for LIP adhesiveness becomes in order to adapt to the demand of present technical equipment.
Summary of the invention
The purpose of this invention is to provide a kind of reduction low ignition tendency cigarette paper fire retardant glue method of viscosity, guarantee LIP glue low viscosity character of (in the flexo process) in the certain hour scope, adapt to the demand of present technical equipment.
The present invention is under the prerequisite of amount of starch in not changing LIP glue, adds some compositions to reduce the viscosity of LIP glue, make it to satisfy present flexo technology requirement, and add acidic materials before use, in and the pH value of glue; Both protected equipment not corroded, and can adopt the surface-coated one deck fire retardant glue of flexo technology again preferably at cigarette paper.
Technical scheme of the present invention is:
In containing the LIP glue of high concentration starch, add propylene glycol, highly basic and an amount of acid, the viscosity of LIP glue is descended significantly, the addition of propylene glycol is: starch: propylene glycol=1:0.75～1.50, the addition of highly basic is: starch: highly basic=10:0.5～1.5, the addition of acid is by the concentration decision of acid, and the amount of residue highly basic is 15～35% of a former addition after guaranteeing to react;
Highly basic comprises NaOH, potassium hydroxide and sodium methoxide, caustic alcohol, a kind of in the water-soluble highly basic such as the organic bases of potassium tert-butoxide.
Described acid is a kind of in the water soluble acids such as phosphoric acid, sulfuric acid, hydrochloric acid, formic acid, acetate.
The optimal addn of propylene glycol is: starch: propylene glycol=1:1.25.
The optimal addn of highly basic is: starch: NaOH=10:1.
Propylene glycol and highly basic all are directly to add in the LIP glue to use.
Propylene glycol is a kind of good organic solvent, and the viscosity of LIP glue can descend significantly behind the adding propylene glycol.But because propylene glycol is a liquid, if addition is excessive, the concentration of whole solution can reduce, and the amount that adopts the flexo technology to be coated on the fire retardant on cigarette paper surface will reduce, thereby reduces flame retardant effect.The addition of seeking a suitable propylene glycol is an important aspect.
Highly basic can impel the starch hydrolysis to become micromolecule after adding LIP glue, helps reducing the concentration of LIP glue.But micromolecule starch can further hydrolysis become glucose, thereby reduces the flame retardant effect of glue; And strong basicity can corrode instrument and equipment, therefore need add a kind of safe acid before use, its part alkalescence that neutralizes, but can guarantee LIP glue low viscosity character of (in the flexo process) in the certain hour scope.
The present invention adopts the method that adds the mixture of a certain amount of propylene glycol and highly basic in fire retardant glue; effectively reduce the viscosity of fire retardant glue, reduce the pH value of fire retardant glue, make it to be suitable for present flexo technology; the protection machinery equipment can satisfy the viscosity requirement of appliance requires simultaneously again in printing process.Can preferably fire retardant glue be printed onto the cigarette paper inboard at low temperatures, and finally roll into cigarette.Do not having when cigarette under the situation of suction, burning to inhibiting tape, and and combustible reduce the burning tendency of cigarette paper when contacting, the possibility of the combustible that reduces to ignite.The present invention can satisfy the requirement of cigarette of preparation low ignition tendency, and is cheap, practicality and high efficiency, and can reduce the ignition tendency of cigarette further.
Description of drawings
Fig. 1 is low ignition tendency (LIP) cigarette schematic diagram.
Fig. 2 is low ignition tendency (LIP) cigarette paper schematic diagram.
Fig. 3 is the change curve of propylene glycol addition of the present invention and solution viscosity.
Among the figure, 1-mouth rod, 2-forming paper, 3-tipping paper, 4-cigarette paper, 5-inhibiting tape, 6-fire retardant glue printed layers.
The specific embodiment
Embodiment 1:
Before industry is used, in containing the LIP glue of high concentration starch, directly add propylene glycol and NaOH, the addition of propylene glycol is: starch: propylene glycol=1:1.25, the addition of highly basic is: starch: highly basic=10:1, the back that stirs is standby.Use an amount of pure phosphoric acid of adding in preceding 5 minutes and shake up, guaranteeing to react back residual hydrogen sodium oxide molybdena surplus is 24.6% of former addition.
Embodiment 2:
Before industry is used, in containing the LIP glue of high concentration starch, directly add propylene glycol and potassium hydroxide, the addition of propylene glycol is: starch: propylene glycol=1:1, the addition of potassium hydroxide is: starch: highly basic=10:0.75, the back that stirs is standby.Use an amount of formic acid of adding in preceding 5 minutes and shake up, guaranteeing to react back residual hydrogen potassium oxide surplus is 15.2% of former addition.
Embodiment 3:
Before industry is used, in containing the LIP glue of high concentration starch, directly add propylene glycol and caustic alcohol, the addition of propylene glycol is: starch: propylene glycol=1:1, the addition of caustic alcohol is: starch: highly basic=10:0.5, the back that stirs is standby.Use an amount of dilute sulfuric acid of adding in preceding 5 minutes and shake up, the addition of dilute sulfuric acid is by the concentration decision of dilute sulfuric acid, and guaranteeing to react back residue caustic alcohol surplus is 30% of former addition.
Embodiment 4:
Before industry is used, in containing the LIP glue of high concentration starch, directly add propylene glycol and caustic alcohol, the addition of propylene glycol is: starch: propylene glycol=1:1.25, the addition of sodium methoxide is: starch: highly basic=10:0.5, the back that stirs is standby.Use an amount of watery hydrochloric acid of adding in preceding 5 minutes and shake up, the addition of watery hydrochloric acid is by the concentration decision of watery hydrochloric acid, and guaranteeing to react back residue caustic alcohol surplus is 35% of former addition.
Embodiment 5:
Before industry is used, in containing the LIP glue of high concentration starch, directly add propylene glycol and potassium tert-butoxide, the addition of propylene glycol is: starch: propylene glycol=1:0.75, the addition of potassium tert-butoxide is: starch: highly basic=10:0.5, the back that stirs is standby.Use an amount of acetate of adding in preceding 5 minutes and shake up, guaranteeing to react back residue potassium tert-butoxide surplus is 20% of former addition.
Below experiment can be further described effect of the present invention.
Under 40 ℃, be matrix with LIP glue, wherein starch-containing 60g adds propylene glycol by gradient, and the viscosity of gained solution with the relation of propylene glycol addition as shown in Figure 3.
As can be seen from Figure 3, along with the increase of propylene glycol addition, the viscosity of solution reduces gradually, and this helps the demand that the flexo technology applies cigarette paper.It can also be seen that from curve when just beginning to add propylene glycol, solution viscosity reduces significantly, but, reduce numerical value and reduce gradually that last difference becomes 0.5 * 50 fixing Pa s along with the increase of addition.Substantially can determine that the variation after the propylene glycol addition is 75 g belongs to fully and adds the decline of the propylene glycol viscosity that effect brings to solution dilution.Therefore can determine that with this understanding, the optimal addn of propylene glycol is: starch: propylene glycol=1:0.75～1.5.
Adopting inorganic strong alkali NaOH is example, and (starch-containing 60g) adds the NaOH of different amounts in identical above-mentioned LIP gel matrix, shown in the related table 1 of its apparent state and NaOH addition;
From form 1 as can be seen, adding NaOH helps starch molecule and is hydrolyzed into micromolecule, helps dissolving, solves mobile problem, and best NaOH additional proportion is about: starch: NaOH=10:0.5～1.5.
Add highly basic and can bring a problem simultaneously again, i.e. the undue hydrolysis meeting of starch produces caramelize, thereby loses the original fire retardation of starch, and makes solution be yellow.Therefore we add the way of acid solution before use, and its alkalescence that neutralizes makes the starch after the hydrolysis regroup into big molecule.As long as guarantee that in use solution had good mobility in three hours, then can satisfy the demand that flexo is produced.
Selecting phosphoric acid for use is example, carries out different H according to the amount of added NaOH in original obtain solution
3PO
4The experiment of addition, and observed the variable condition of its solution in three hours.
Containing 1.3gNaOH, 12.5g propylene glycol, the H of the different amounts of adding in the colloid of 10g starch and 30g water
3PO
4, the variation tendency of its three hours internal states is as shown in table 2;
As can be seen from Table 2, will to keep good mobility can only be under alkali condition to LIP glue.Under the acid condition, the starch molecule after the hydrolysis can very fast polymerization, forms gel once more, is unfavorable for the needs that flexo applies.Consider that alkalescence has corrosiveness to instrument too by force, therefore need reduce the amount of residue NaOH under the prerequisite that keeps flowability as far as possible, the amount of residue highly basic is 15～35% of a former addition after the reaction, is fit to.
Claims (5)
1. one kind is reduced low ignition tendency cigarette paper fire retardant glue method of viscosity, it is characterized in that in containing the LIP glue of high concentration starch, adding propylene glycol, highly basic and an amount of acid, the viscosity of LIP glue is descended significantly, the addition of propylene glycol is: starch: propylene glycol=1:0.75～1.5, the addition of highly basic is: starch: highly basic=10:0.5～1.5, the amount of residue highly basic was 15～35% of a former addition after the addition of acid was guaranteed to react.
2. reduction low ignition tendency cigarette paper fire retardant glue method of viscosity according to claim 1 is characterized in that highly basic is NaOH, potassium hydroxide and sodium methoxide, caustic alcohol, a kind of in the water-soluble highly basic of the organic bases of potassium tert-butoxide.
3. reduction low ignition tendency cigarette paper fire retardant glue method of viscosity according to claim 1 is characterized in that described acid is a kind of in phosphoric acid, sulfuric acid, hydrochloric acid, formic acid, the acetate water soluble acid.
4. reduction low ignition tendency cigarette paper fire retardant glue method of viscosity according to claim 1 is characterized in that the addition of propylene glycol is: starch: propylene glycol=1:1.25.
5. reduction low ignition tendency cigarette paper fire retardant glue method of viscosity according to claim 1 is characterized in that the addition of highly basic is: starch: NaOH=10:1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100663966A CN102174779B (en) | 2011-03-18 | 2011-03-18 | Method for reducing viscosity of flame retardant glue for low ignition propensity (LIP) cigarette paper |
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|---|---|---|---|
| CN2011100663966A CN102174779B (en) | 2011-03-18 | 2011-03-18 | Method for reducing viscosity of flame retardant glue for low ignition propensity (LIP) cigarette paper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102391795A (en) * | 2011-09-26 | 2012-03-28 | 湖南中烟工业有限责任公司 | Acidic flame-retardant adhesive for automatically extinguishing cigarettes and application method |
| CN102493268A (en) * | 2011-11-28 | 2012-06-13 | 云南烟草科学研究院 | Efficient flame-retardant coating for low-ignition-tendency cigarette paper |
Citations (5)
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| CN1030110A (en) * | 1987-06-24 | 1989-01-04 | 天津轻工业学院 | Fire retardant for paper |
| WO2007119484A1 (en) * | 2006-03-30 | 2007-10-25 | Japan Tobacco Inc. | Lowly burnable wrapping paper for cigarette |
| US20100116282A1 (en) * | 2007-08-10 | 2010-05-13 | Takashi Kominami | Low ignition propensity cigarette paper |
| CN101781867A (en) * | 2010-02-09 | 2010-07-21 | 广东中烟工业有限责任公司 | Low ignition tendency cigarette paper and preparation method thereof |
| CN101858044A (en) * | 2010-06-23 | 2010-10-13 | 牡丹江恒丰纸业股份有限公司 | Preparation method of cigarette paper additive |
-
2011
- 2011-03-18 CN CN2011100663966A patent/CN102174779B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030110A (en) * | 1987-06-24 | 1989-01-04 | 天津轻工业学院 | Fire retardant for paper |
| WO2007119484A1 (en) * | 2006-03-30 | 2007-10-25 | Japan Tobacco Inc. | Lowly burnable wrapping paper for cigarette |
| US20100116282A1 (en) * | 2007-08-10 | 2010-05-13 | Takashi Kominami | Low ignition propensity cigarette paper |
| CN101781867A (en) * | 2010-02-09 | 2010-07-21 | 广东中烟工业有限责任公司 | Low ignition tendency cigarette paper and preparation method thereof |
| CN101858044A (en) * | 2010-06-23 | 2010-10-13 | 牡丹江恒丰纸业股份有限公司 | Preparation method of cigarette paper additive |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102391795A (en) * | 2011-09-26 | 2012-03-28 | 湖南中烟工业有限责任公司 | Acidic flame-retardant adhesive for automatically extinguishing cigarettes and application method |
| CN102493268A (en) * | 2011-11-28 | 2012-06-13 | 云南烟草科学研究院 | Efficient flame-retardant coating for low-ignition-tendency cigarette paper |
| CN102493268B (en) * | 2011-11-28 | 2014-04-16 | 云南烟草科学研究院 | Efficient flame-retardant coating for low-ignition-tendency cigarette paper |
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| CN102174779B (en) | 2012-06-27 |
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Owner name: HONGTA TOBACCO (GROUP) CO., LTD. Effective date: 20120412 |
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Effective date of registration: 20120412 Address after: 650000 Kunming science and technology zone, Yunnan high tech Road, No. 41 Applicant after: Yunnan Inst. of Tobacco Sciences Co-applicant after: Hongta Tobacco (Group) Co., Ltd. Address before: 650000 Kunming science and technology zone, Yunnan high tech Road, No. 41 Applicant before: Yunnan Inst. of Tobacco Sciences |
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