CN110552250B - Production method of functional cigarette paper - Google Patents
Production method of functional cigarette paper Download PDFInfo
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- CN110552250B CN110552250B CN201910766555.XA CN201910766555A CN110552250B CN 110552250 B CN110552250 B CN 110552250B CN 201910766555 A CN201910766555 A CN 201910766555A CN 110552250 B CN110552250 B CN 110552250B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention provides a production method of functional cigarette paper, which comprises the following raw materials in parts by weight: 5-30 parts of tobacco stalk fibers, 70-95 parts of wood pulp fibers, 15-50 parts of fillers, 0.5-5 parts of auxiliaries and 1.5-8 parts of combustion improver, wherein the combustion improver is coated on one side surface of the functional cigarette paper. The production method comprises the following steps: preparing ingredients according to the weight parts of the functional cigarette paper, and steaming the tobacco stems; rinsing the steamed tobacco stems; continuously pulping bleached wood pulp and bleached tobacco stalks respectively, mixing, and adding a filler to obtain mixed synthetic pulp; diluting the mixed slurry, adding an auxiliary agent, and performing dewatering and embossing treatment on a mesh part forming and pressing part to obtain wet paper sheets; and (3) carrying out pre-drying and drying treatment on the wet paper to obtain a semi-dry paper, coating a combustion improver solution on the surface of the semi-dry paper, carrying out post-drying and drying treatment again, and coiling to obtain the functional cigarette paper.
Description
Technical Field
The invention belongs to the technical field of cigarette paper preparation, and particularly relates to a production method of functional cigarette paper.
Background
The cigarette paper is an essential material for cigarette production, is a wrapping carrier of cigarette tobacco shreds, has important influence on the combustion characteristic, sensory smoking quality, smoke release and the like of the cigarettes, and provides an appearance visual effect. The air permeability of the cigarette paper is one of key indexes of the cigarette paper, the uniformity of the air permeability of the cigarette paper seriously influences the consistency of smoking taste, most of cigarette products adopted in the current market are conventional cigarette paper and are prepared from white whole wood pulp or jute pulp fibers, the problem of poor uniformity of the air permeability still exists, and the adjustment means is mainly used for enhancing the control of the production process.
At present, adding combustion regulator in cigarette paper is an important method for reducing the release amount of mainstream smoke, and the influence of different types of added combustion improver on the number of suction openings of each cigarette and the smoke delivery amount of each cigarette is obviously different, such as combustion improver acetate, although the number of suction openings is reduced, the delivery amount of each smoke is increased greatly; the combustion improver citrate reduces the number of suction openings and simultaneously ensures that the delivery amount of the single-opening smoke is not increased, but the delivery amount of the single-opening smoke is increased after being reduced along with the increase of the consumption of the citrate, so that the proper combustion improver formula and the optimal addition amount in paper are found to reduce the weight of the mainstream smoke through the combustion regulator.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a production method of functional cigarette paper, which can improve the stability of the air permeability index of the cigarette paper, reduce the release amount of CO and tar in the mainstream smoke in the combustion process of the cigarette paper and improve the sense of the cigarette paper. The technical scheme of the invention is as follows:
in a first aspect, the invention provides a functional cigarette paper, which comprises the following raw materials in parts by weight: 5-30 parts of tobacco stalk fibers, 70-95 parts of wood pulp fibers, 15-50 parts of fillers, 0.5-5 parts of auxiliaries and 1.5-8 parts of combustion improver, wherein the combustion improver is coated on one side surface of the functional cigarette paper.
Furthermore, the filler is calcium carbonate powder with the particle size less than or equal to 4.5 mu m.
Further, the auxiliary agent is selected from one or more of sodium hydroxide, sodium sulfide, sodium oxide, sodium sulfite, sodium carbonate, peracetic acid, sodium pyrophosphate, hydrogen peroxide, magnesium sulfate, sodium silicate, guar gum reinforcing agent, guar gum retention aid and defoaming agent.
Further, the combustion improver is a mixture prepared by compounding at least three of potassium citrate, potassium fumarate, potassium malate, sodium malate, potassium carbonate, sodium carbonate, potassium tartrate and potassium gluconate.
Further, the performance indexes of the functional cigarette paper are as follows:quantification: (25-45) g per square meter; longitudinal tensile strength: not less than 0.98 kN/m; air permeability: (15-110) CU; the opacity (green light) is more than or equal to 73.0 percent; longitudinal tensile energy absorption is more than or equal to 7.0J/m2(ii) a Ash (calculated as CaO): (10-25)%; moisture content: (3-6)%.
A production method of functional cigarette paper comprises the following steps:
(1) preparing ingredients according to the weight parts of the functional cigarette paper, and steaming the tobacco stems;
(2) rinsing the steamed tobacco stems;
(3) continuously pulping bleached wood pulp and bleached tobacco stalks respectively, mixing, and adding a filler to obtain mixed synthetic pulp;
(4) diluting the mixed slurry, adding an auxiliary agent, and performing dewatering and embossing treatment on a mesh part forming and pressing part to obtain wet paper sheets;
(5) and (3) carrying out pre-drying and drying treatment on the wet paper to obtain a semi-dry paper, coating a combustion improver solution on the surface of the semi-dry paper, carrying out post-drying and drying treatment again, and coiling to obtain the functional cigarette paper.
Further, the specific control process of the cooking treatment in the step (1) is as follows: the method comprises the following steps of (1) carrying out cooking treatment on tobacco stems by adopting a caustic soda method, a sulfate method, an alkaline sodium sulfite or neutral sodium sulfite (ammonium) method, wherein the liquid medicine amount is 5.0-20.0%, and the liquid ratio is as follows: 1: (2-8); the initial liquid medicine temperature is 60-80 ℃, the temperature is raised for the first time after the idle operation is carried out for 60-120 min, the temperature is raised for the second time after the air is discharged for 5-30 min when reaching 100-125 ℃, the temperature is raised to 130-170 ℃, the temperature is kept for 1-5 h, then the materials are discharged, the pot discharging hardness is 10.0-20.0 KaPPa, the residual alkali of the black liquid is less than or equal to 18(g/l), the cooking yield is 60-70%, and the D65 brightness is greater than or equal to 40%.
Further, the specific control process of the rinsing treatment in the step (2) is as follows: washing the steamed tobacco stems for 2-7 hours by using water, carrying out one-stage bleaching treatment on the washed tobacco stems by using a peracetic acid solution with the mass concentration of 0.3-2.0%, wherein the addition amount of the peracetic acid is 2-15% of the dry weight of the tobacco stems, and meanwhile, sodium pyrophosphate is added as a stabilizer of the peracetic acid, and the addition amount of the sodium pyrophosphate is 0.1-5% of the dry weight of the tobacco stems; washing the tobacco stems subjected to first-stage bleaching for 2-7 hours by using water, and performing second-stage bleaching on the washed tobacco stems by using a hydrogen peroxide solution with the mass concentration of 2-40%, wherein the addition amount of the hydrogen peroxide is 6-12% of the dry weight of the tobacco stems, and meanwhile, a sodium silicate solution with the mass concentration of 1-15% and a magnesium sulfate solution with the mass concentration of 0.5-10% are added as hydrogen peroxide protective agents, the addition amount of the sodium silicate is 1-12% of the dry weight of the tobacco stems, and the addition amount of the magnesium sulfate is 0.1-2% of the dry weight of the tobacco stems; washing the two-stage bleached tobacco stems for 10-15 h by using water, wherein the brightness of D65 of the obtained rinsed tobacco stems is more than or equal to 60%, the chlorine root after washing is less than or equal to 0.1g/l, the concentration of washing slurry is 2-8%, the rinsing yield is 30-40%, and the knocking degree of the bleached tobacco stems: (30-90) ° SR, wet weight: (0.5-5) g.
Further, in the step (4), the mixed slurry is diluted to a concentration of 0.4-0.8%.
Further, the moisture content of the wet paper in the step (4) is 40-60%.
Further, in the step (5), the temperature of the pre-drying treatment is 65-105 ℃, and the moisture of the semi-dry paper is 3-10%; the temperature of the post-drying treatment is 95-110 ℃.
The invention has the beneficial effects that: the waste tobacco stems are added into the cigarette paper, so that the utilization value of the waste tobacco stems is improved, the cigarette paper has a supplementary effect on the combustion quality of the cigarette paper, is combined with the filler and the functional auxiliary agent, greatly improves the release amount of main stream smoke CO and tar in the combustion process of the cigarette paper, and has good uniformity and strength. The functional cigarette paper has high matching degree with most tobacco shreds with faint scent type, strong scent type and the like, the CO release amount can be reduced by 10-25%, and the tar release amount can be reduced by 8-20%.
The production method of the invention is that the tobacco stems are boiled, rinsed to remove organic components such as lignin and the like in the tobacco stems, and then the tobacco stems are pulped to form white tobacco stem fibers more suitable for papermaking, and after the processes of adding fillers and auxiliary agents, forming net parts and the like are carried out, the paper surface appearance is softer, finer and more comfortable, and the paper has better air permeability stability and greatly improved combustion quality.
Detailed Description
In the description of the present invention, it is to be noted that those whose specific conditions are not specified in the examples are carried out according to the conventional conditions or the conditions recommended by the manufacturers. The reagents or instruments used are not indicated by the manufacturer, and are conventional products available commercially.
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
Example 1
The embodiment provides a functional cigarette paper, which comprises the following raw materials in parts by weight: 10 parts of tobacco stalk fibers, 45 parts of softwood pulp fibers, 45 parts of hardwood pulp fibers, 35 parts of calcium carbonate powder with the particle size of less than or equal to 4.5 microns, 1.5 parts of guar gum reinforcing agent, 0.04 parts of guar gum retention aid and 3.6 parts of combustion improver, wherein the combustion improver is coated on one side surface of the functional cigarette paper. The combustion improver is potassium citrate: sodium malate: potassium carbonate: the sodium carbonate is a mixture with the mass ratio of 1.5:1.2:0.6: 0.6. The production method of the cigarette paper comprises the following steps:
(1) and (3) cooking: the tobacco stems are steamed and boiled by an alkaline sodium sulfite method, the adding amount of a liquid medicine is 10.5 percent (9 percent of sodium hydroxide and 1.5 percent of sodium sulfite), and the liquid ratio is 1: 4; the initial liquid medicine temperature is 65 ℃, the first temperature rise is carried out after the idle operation is carried out for 90min, the second temperature rise is carried out after the temperature reaches 125 ℃ and the small air release is carried out for 10min, the temperature is raised to 170 ℃, the temperature is kept for 2h, then the materials are discharged, the pot hardness is 18.9KaPPa, the black liquor residual alkali: 5.3g/l, cooking yield 67%, D65 brightness: 40.2 percent.
(2) Rinsing: washing the steamed tobacco stems for 5 hours by using water, carrying out primary bleaching treatment on the washed tobacco stems by adopting a peracetic acid solution with the mass concentration of 1.0%, wherein the addition amount of the peracetic acid is 4% of the dry weight of the tobacco stems, simultaneously adding sodium pyrophosphate as a stabilizer of the peracetic acid, the addition amount of the sodium pyrophosphate is 0.8% of the dry weight of the tobacco stems, washing the tobacco stems subjected to primary bleaching for 5 hours by using water, carrying out secondary bleaching by adopting a hydrogen peroxide solution with the mass concentration of 10%, the hydrogen peroxide solution is 6% of the dry weight of the tobacco stems, simultaneously adding a sodium silicate solution with the mass concentration of 4% and a magnesium sulfate solution with the mass concentration of 0.8% as hydrogen peroxide protective agents, the addition amount of sodium silicate is 6% of the dry weight of the tobacco stems, the addition amount of the magnesium sulfate is 0.3% of the dry weight of the tobacco stems, washing the tobacco stems subjected to secondary bleaching for 10 hours, and obtaining the D65 brightness of the rinsed tobacco stems of 60.8%, 0.06g/l of washed chlorine root, 4% of washing pulp, 35% of rinsing yield, and knocking degree of the rinsed tobacco stems: 34 ° SR, wet weight: 4.6 g.
(3) Pulping: the bleached softwood pulp fibers and the bleached tobacco stalk fibers are continuously pulped by adopting 2 double disc mills respectively, and the bleached hardwood pulp is continuously pulped by adopting 1 double disc mill. The beating concentration of the softwood pulp fibers is 4.2 percent, and the beating degree is as follows: (85-88) ° SR, wet weight: (9.0-11.0) g; the beating concentration of the hardwood pulp fiber is 4.2 percent, and the beating degree is as follows: (28-32) ° SR, wet weight: (0.5-1.5) g; the pulping concentration of the tobacco stalk fiber is 3.6 percent, and the beating degree is as follows: (82-86) ° SR, wet weight: (2.5-3.5) g. Mixing the pulped softwood pulp fibers, hardwood pulp fibers and tobacco stalk fibers to obtain mixed pulp; adding the dispersed calcium carbonate powder into the mixed slurry to obtain mixed slurry; and (3) producing and manufacturing the mixed synthetic pulp by using a fourdrinier machine.
(4) A papermaking section: mixing the above materials to obtain pulp, diluting to 0.6%, respectively adding 0.3% guar gum reinforcing agent and 0.1% guar gum retention aid via short circulation system, forming at net part and squeezing part, dewatering, and embossing to obtain wet paper sheet; carrying out pre-drying treatment on the wet paper to obtain semi-dry paper, wherein the temperature is 85-95 ℃; and (3) coating a combustion improver solution with the mass concentration of 3% on a page table of the semi-dry paper, drying again at the temperature of 95-110 ℃, and coiling to obtain the functional cigarette paper containing the tobacco stalk fibers.
The performance indexes of the functional cigarette paper of the embodiment are as follows: quantification: 28.1g per square meter; longitudinal tensile strength: 1.30 kN/m; air permeability: 50.6 CU; ash (calculated as CaO): 16 percent; opacity (green): 73.5 percent; moisture content: 3.8 percent; longitudinal tensile energy absorption: 11.4J/m2。
Example 2
The embodiment provides a functional cigarette paper, which comprises the following raw materials in parts by weight: 20 parts of tobacco stalk fibers, 35 parts of softwood pulp fibers, 45 parts of hardwood pulp fibers, 42 parts of calcium carbonate powder with the particle size of less than or equal to 4.5 microns, 2.5 parts of guar gum reinforcing agent, 0.08 part of guar gum retention aid and 5 parts of combustion improver, wherein the combustion improver is coated on one side surface of the functional cigarette paper. The combustion improver is potassium tartrate: potassium malate: sodium malate: the mass ratio of potassium gluconate to potassium gluconate is 1: 1: 0.8: 0.6 of the mixture. The production method of the cigarette paper comprises the following steps:
(1) and (3) cooking: the tobacco stems are steamed and boiled by an alkaline sodium sulfite method, the adding amount of a liquid medicine is 12 percent (10 percent of sodium hydroxide and 2 percent of sodium sulfite), and the liquid ratio is 1: 5; the initial liquid medicine temperature is 70 ℃, the primary heating is carried out after the idle running is carried out for 80min, the secondary heating is carried out after the temperature reaches 120 ℃ and the air is little discharged for 10min, the temperature is raised to 160 ℃, the temperature is kept for 5h, then the discharging is carried out, the discharging hardness is 16.1KaPPa, the black liquid residual alkali: 6.4g/l, cooking yield 64%, D65 brightness: 42.5 percent.
(2) Rinsing: washing the steamed tobacco stems for 6 hours by using water, carrying out primary bleaching treatment on the washed tobacco stems by adopting a peracetic acid solution with the mass concentration of 1.0%, wherein the addition amount of the peracetic acid is 5% of the dry weight of the tobacco stems, simultaneously adding sodium pyrophosphate as a stabilizer of the peracetic acid, the addition amount of the sodium pyrophosphate is 1.0% of the dry weight of the tobacco stems, washing the tobacco stems subjected to primary bleaching for 5 hours by using water, carrying out secondary bleaching by adopting a hydrogen peroxide solution with the mass concentration of 10%, the addition amount of the hydrogen peroxide is 7% of the dry weight of the tobacco stems, simultaneously adding a sodium silicate solution with the mass concentration of 4% and a magnesium sulfate solution with the mass concentration of 0.8% as hydrogen peroxide protective agents, the addition amount of sodium silicate is 7% of the dry weight of the tobacco stems, the addition amount of the magnesium sulfate is 0.4% of the dry weight of the tobacco stems, washing the tobacco stems subjected to secondary bleaching for 12 hours, and obtaining the rinsed tobacco stems D65 with the brightness of 63.1%, 0.08g/l of washed chlorine root, 4% of washing pulp, 35% of rinsing yield, and knocking degree of the rinsed tobacco stems: 35 ° SR, wet weight: 4.5 g.
(3) Pulping: the bleached softwood pulp fibers and the bleached tobacco stalk fibers are continuously pulped by adopting 2 double disc mills respectively, and the bleached hardwood pulp is continuously pulped by adopting 1 double disc mill. The beating concentration of the softwood pulp fibers is 4.2 percent, and the beating degree is as follows: (85-88) ° SR, wet weight: (9.0-11.0) g; the beating concentration of the hardwood pulp fiber is 4.2 percent, and the beating degree is as follows: (40-44) ° SR, wet weight: (0.5-1.5) g; pulping tobacco stalk fiber, wherein the pulping concentration is 3.6%, and the beating degree is as follows: (70-74) ° SR, wet weight: (2.5-3.5) g. Mixing the pulped softwood pulp fibers, hardwood pulp fibers and tobacco stalk fibers to obtain mixed pulp; adding the dispersed calcium carbonate powder into the mixed slurry to obtain mixed slurry; and mixing the pulp to produce and manufacture the pulp by using a fourdrinier machine.
(4) A papermaking section: mixing the above materials to obtain slurry, diluting to 0.5%, adding 0.3% guar gum reinforcing agent and 0.1% guar gum retention aid via short circulation system, forming at net part, dewatering at press part, and embossing to obtain wet paper sheet; carrying out pre-drying treatment on the wet paper to obtain semi-dry paper, wherein the temperature is 80-90 ℃; and (3) coating a combustion improver solution with the mass concentration of 3% on a page table of the semi-dry paper, drying again at the temperature of 100-105 ℃, and coiling to obtain the functional cigarette paper containing the tobacco stalk fibers.
The performance indexes of the functional cigarette paper of the embodiment are as follows: quantification: 28.1g per square meter; longitudinal tensile strength: 1.30 kN/m; air permeability: 50.3 CU; ash (calculated as CaO): 18 percent; opacity (green): 73.8 percent; moisture content: 3.8 percent; longitudinal tensile energy absorption: 11.20J/m2。
Example 3
The embodiment provides a functional cigarette paper, which comprises the following raw materials in parts by weight: 30 parts of tobacco stalk fibers, 30 parts of softwood pulp fibers, 40 parts of hardwood pulp fibers, 38 parts of calcium carbonate powder with the particle size of less than or equal to 4.5 microns, 3.5 parts of guar gum reinforcing agent, 0.12 part of guar gum retention aid and 4.2 parts of combustion improver, wherein the combustion improver is coated on one side surface of the functional cigarette paper. The combustion improver is potassium citrate: potassium malate: potassium carbonate: the potassium gluconate is a mixture of potassium gluconate and potassium gluconate according to the mass ratio of 1.6:0.9:1.2: 0.5. The production method of the cigarette paper comprises the following steps:
(1) and (3) cooking: the tobacco stems are steamed and boiled by an alkaline sodium sulfite method, the adding amount of liquid medicine is 14.5 percent (12 percent of sodium hydroxide and 2.5 percent of sodium sulfite), and the liquid ratio is 1: 6; the initial liquid medicine temperature is 65 ℃, the temperature is raised for the first time after the air operation is carried out for 90min, the temperature is raised to 125 ℃, the secondary temperature rise is carried out after the air is slightly released for 10min, the temperature is raised to 150 ℃, the temperature is kept for 3.5h, then the materials are discharged, the pot hardness is 15.6KaPPa, the black liquid residual alkali: 8.9g/l, cooking yield 61.5%, D65 brightness: 43.2 percent.
(2) Rinsing: washing the steamed tobacco stems for 6 hours by using water, carrying out primary bleaching treatment on the washed tobacco stems by using a peracetic acid solution with the mass concentration of 1.0%, wherein the addition amount of the peracetic acid is 6% of the dry weight of the tobacco stems, simultaneously adding sodium pyrophosphate as a stabilizer of the peracetic acid, washing the one-stage bleached tobacco stems for 5 hours by using water with the addition amount of the sodium pyrophosphate being 1.2% of the dry weight of the tobacco stems, carrying out secondary bleaching by using a hydrogen peroxide solution with the mass concentration of 10%, the addition amount of the hydrogen peroxide being 8% of the dry weight of the tobacco stems, simultaneously adding a sodium silicate solution with the mass concentration of 4% and a magnesium sulfate solution with the mass concentration of 0.8% as hydrogen peroxide protective agents, the addition amount of sodium silicate being 8% of the dry weight of the tobacco stems, the addition amount of the magnesium sulfate being 0.5% of the dry weight of the tobacco stems, washing the two-stage bleached tobacco stems for 12 hours by using water, and obtaining the rinsed tobacco stems D65 with the brightness of 64.2%, 0.09g/l of washed chlorine root, 4 percent of washing pulp, 32 percent of rinsing yield, and the beating degree of the rinsed tobacco stalk: 37 ° SR, wet weight: 4.3 g.
(3) Pulping: the bleached softwood pulp fibers and the bleached tobacco stalk fibers are continuously pulped by adopting 2 double disc mills respectively, and the bleached hardwood pulp is continuously pulped by adopting 1 double disc mill. The beating concentration of the softwood pulp fibers is 4.2%, and the beating degree is as follows: (85-88) ° SR, wet weight: (9.0-11.0) g; the beating concentration of the hardwood pulp fiber is 4.2 percent, and the beating degree is as follows: (28-32) ° SR, wet weight: (0.5-1.5) g; the pulping concentration of the tobacco stalk fiber is 3.6 percent, and the beating degree is as follows: (60-64) ° SR, wet weight: (2.5-3.5) g. Mixing the pulped softwood pulp fibers, hardwood pulp fibers and tobacco stalk fibers to obtain mixed pulp; adding the dispersed calcium carbonate powder into the mixed slurry to obtain mixed slurry; and (3) producing and manufacturing the mixed synthetic pulp by using a fourdrinier machine.
(4) A papermaking section: mixing the above materials to obtain pulp, diluting to 0.5%, respectively adding 0.3% guar gum reinforcing agent and 0.1% guar gum retention aid via short circulation system, forming at net part and squeezing part, dewatering, and embossing to obtain wet paper sheet; carrying out pre-drying treatment on the wet paper to obtain semi-dry paper, wherein the temperature is 85-95 ℃; and (3) coating a combustion improver solution with the mass concentration of 3% on a page table of the semi-dry paper, drying again at the temperature of 100-105 ℃, and coiling to obtain the functional cigarette paper containing the tobacco stalk fibers.
The performance indexes of the functional cigarette paper of the embodiment are as follows: quantification: 28.2 grams per square meter; longitudinal tensile strength: 1.28 kN/m; air permeability: 50.1 CU; ash (calculated as CaO): 17 percent; opacity (green): 73.2 percent; moisture content: 3.2 percent; longitudinal tensile energy absorption: 11.05J/m2。
Comparative example 1
The comparative example provides a functional cigarette paper, which comprises the following raw materials in parts by weight: 45 parts of softwood pulp fibers, 55 parts of hardwood pulp fibers, 35 parts of calcium carbonate powder with the particle size of less than or equal to 4.5 microns, 1.5 parts of guar gum reinforcing agent, 0.04 part of guar gum retention aid and 3.6 parts of combustion improver, wherein the combustion improver is coated on one side surface of the functional cigarette paper. The combustion improver is potassium citrate: sodium malate: potassium carbonate: the sodium carbonate is a mixture of 1.5:1.2:0.6:0.6 in mass ratio. The production method of the cigarette paper comprises the following steps:
(1) pulping: bleached softwood pulp fibers were continuously pulped using 2 double disc mills, and bleached hardwood pulp was continuously pulped using 1 other double disc mill. The beating concentration of the softwood pulp fibers is 4.2%, and the beating degree is as follows: (85-88) ° SR, wet weight: (9.0-11.0) g; the beating concentration of the hardwood pulp fiber is 4.2 percent, and the beating degree is as follows: (28-32) ° SR, wet weight: (0.5 to 1.5) g. Mixing the pulped softwood pulp fibers and softwood pulp fibers to obtain mixed pulp; adding the dispersed calcium carbonate powder into the mixed slurry to obtain mixed slurry; and (3) producing and manufacturing the mixed synthetic pulp by using a fourdrinier machine.
(2) A papermaking section: mixing the above materials to obtain pulp, diluting to 0.6%, respectively adding 0.3% guar gum reinforcing agent and 0.1% guar gum retention aid via short circulation system, forming at net part and squeezing part, dewatering, and embossing to obtain wet paper sheet; carrying out pre-drying treatment on the wet paper to obtain semi-dry paper, wherein the temperature is 85-95 ℃; and (3) coating a combustion improver solution with the mass concentration of 3% on a page table of the semi-dry paper, drying again at the temperature of 95-100 ℃, and coiling to obtain the cigarette paper of the comparative example.
The performance indexes of the functional cigarette paper of the comparative example are as follows: quantification: 28.2 grams per square meter; longitudinal tensile strength: 1.41 kN/m; air permeability 50.8 CU; ash (calculated as CaO): 16 percent; opacity (green): 73.4 percent; moisture content: 4.0 percent; longitudinal tensile energy absorption: 11.95J/m2。
Comparative example 2
The comparative example provides a functional cigarette paper, which comprises the following raw materials in parts by weight: 45 parts of softwood pulp fiber, 55 parts of hardwood pulp fiber, 35 parts of calcium carbonate powder with the particle size of less than or equal to 4.5 mu m, 1.5 parts of guar gum reinforcing agent and 0.04 part of guar gum retention aid. The production method of the cigarette paper comprises the following steps:
(1) pulping: bleached softwood pulp fibers were continuously pulped using 2 double disc mills, and bleached hardwood pulp was continuously pulped using 1 other double disc mill. The beating concentration of the softwood pulp fibers is 4.2%, and the beating degree is as follows: (85-88) ° SR, wet weight: (9.0-11.0) g; the beating concentration of the hardwood pulp fiber is 4.2 percent, and the beating degree is as follows: (28-32) ° SR, wet weight: (0.5 to 1.5) g. Mixing the pulped softwood pulp fibers and softwood pulp fibers to obtain mixed pulp; adding the dispersed calcium carbonate powder into the mixed slurry to obtain mixed slurry; and (3) producing and manufacturing the mixed synthetic pulp by using a fourdrinier machine.
(4) A papermaking section: mixing the above materials to obtain pulp, diluting to 0.6%, respectively adding 0.3% guar gum reinforcing agent and 0.1% guar gum retention aid via short circulation system, forming at net part and squeezing part, dewatering, and embossing to obtain wet paper sheet; carrying out pre-drying treatment on the wet paper to obtain semi-dry paper, wherein the temperature is 85-95 ℃; and (3) after the page of the semi-dry paper is coated with water, carrying out post-drying treatment again at the temperature of 95-100 ℃, and coiling to obtain the cigarette paper of the comparative example.
The performance indexes of the functional cigarette paper of the comparative example are as follows: quantification: 28.3g per square meter; high longitudinal tensile strengthDegree: 1.45 kN/m; air permeability: 49.3 CU; ash (calculated as CaO): 16 percent; opacity (green): 73.5 percent; moisture content: 3.8 percent; longitudinal tensile energy absorption: 11.85J/m2。
Under the condition of the same specification, the physical indexes and the smoke indexes of the examples 1 to 3 and the comparative examples 1 to 2 are compared, and 5 experts having national cigarette smoking qualification are organized for sensory evaluation, and the results are shown in table 1:
TABLE 1
The data in the table show that the cigarette paper with the bleached tobacco stems in the examples 1-3 has better air permeability stability compared with the common cigarette paper, the CO and tar release amount of the main stream smoke can be effectively reduced by adding the bleached tobacco stems and coating the compound combustion improver on the surface in the examples 1-3, and the sensory quality evaluation value is better than that of the common cigarette paper after adding a certain amount of the bleached tobacco stems.
Performance detection
And (3) carrying out various index detection on the functional cigarette paper obtained in the embodiments 1-3.
1) The total number of colonies was measured as shown in Table 2.
TABLE 2 results of total colony count detection in examples 1 to 3
| Examples | Total number of colonies CFU/g |
| 1 | ＜10 |
| 2 | ＜10 |
| 3 | ＜10 |
Note: the test method is referred to GB 4789.2-2016.
2) Microbiological indicators were measured as shown in table 3.
TABLE 3 results of detection of microorganism indicators in examples 1 to 3
| Examples | Coliform bacteria/(/ 50 cm)2) | Salmonella/(/ 50 cm)2) | mold/(CFU/g) |
| 1 | ND | ND | ＜10 |
| 2 | ND | ND | ＜10 |
| 3 | ND | ND | ＜10 |
Note: according to the test method of coliform and salmonella, GB14934-2016 is referenced, the limit values are 'not detected', and ND is 'not detected'; the mould test method is referred to GB 4789.15-2016 with a limit of '50'.
3) Chloroform extract detection, test method: reference is made to US FDA 21 CFR 176.170, as shown in table 4.
TABLE 4 chloroform extract test methods
4) Fluorescent substances, formaldehyde, total migration, potassium permanganate consumption, and heavy metal detection, as shown in table 5.
TABLE 5 fluorescent substance, Formaldehyde, Total migration, Potassium permanganate consumption, heavy Metal detection results
Note: reference to GB 31604.47-2016 for fluorescent substance test methods; according to the formaldehyde test method, GB 31604.48-2016 is referred, the limit value is '1.0', the report limit is '0.06', and ND is 'undetected'; the method for measuring the total migration amount is described in table 6 with reference to GB 31604.8-2016; the test method for potassium permanganate consumption refers to GB 4806.8-2016, and is specifically shown in Table 7; the heavy metal test method is described in table 8 with reference to GB 4806.8-2016.
TABLE 6 test method of total migration
| Simulated liquid | Time | Temperature of | Limit value | Reporting limits |
| Distilled water | 240.0hr(s) | 40℃ | 10 | 3.0 |
| 10% ethanol | 40.0hr(s) | 240℃ | 10 | 3.0 |
TABLE 7 test method of potassium permanganate consumption
| Simulated liquid | Time | Temperature of | Limit value | Reporting limits |
| Distilled water | 2.0hr(s) | 60℃ | 40 | 1.0 |
TABLE 8 heavy metal test methods
5) The solvent residue was measured, and the results are shown in Table 9.
TABLE 9 results of solvent residue detection
Note: the test method refers to YC/T207-'
6) The results of fluorescence intensity measurement are shown in Table 10.
TABLE 10 results of fluorescence luminance detection
| Examples | D65 fluorescence intensity% |
| 1 | ＜0.5 |
| 2 | ＜0.5 |
| 3 | ＜0.5 |
Note: test method reference GB/T7974-
7) The test method of the acute oral toxicity test refers to the test method of the acute oral toxicity of GB/T21603-.
The test system comprises: ICR mice, SPF grade;
100 males, 20-23 g; 100 females, 20-24 g (10 females/males used in each example).
Breeding unit: beijing Huafukang Biotechnology GmbH (SCXK (Jing) 2014-.
Animal certification number: 11401300089815.
a breeding environment: the temperature is 21.2-24.4 ℃, and the average daily temperature difference is less than or equal to 3.2 ℃; the relative humidity is 36.7-61.9%.
The types of the feed are as follows: cobalt60Radiation sterilization rat complete pellet feed.
The feed source is as follows: beijing Huafukang Biotechnology GmbH (SCXK (Jing) 2014-.
Certificate number: 1103221800001799.
the test method comprises the following steps:
sample preparation: soaking in pure water at 60 deg.C for 2 hr. The ratio of the surface area of the leaching medium to the surface area of the test object is 1cm2The area was immersed in 2mL of the immersion solution. The extraction stock solution is used as a sample and pure water is used as a solvent to prepare a sample solution with the concentration of 250 mg/mL. The test sample is placed at normal temperature in the sample feeding processShould not exceed half a day.
And (3) experimental design:
using the limit test method, 20 ICR mice were used per sample, each half of which was female and male, and a 5000mg/kg · bw dose group was set. Animals were given test samples by oral gavage after overnight fasting, observed closely for 4 hours, and observed for toxicity performance in mice 14 days after sample administration. CO for surviving animals at the end of the experiment2Sacrifice, dissect the flesh and observe the pathological changes of tissues and organs.
Sample administration route and method: a syringe with a gavage needle is used for oral gavage sample feeding (0.2mL/10g · bw), and the sample feeding time is in the morning.
And (3) clinical observation: the observation was performed 1 time a day for 14 days.
And (3) measuring the body weight: the observation period was measured 1 time per week.
And (3) pathological examination: all test animals were subjected to gross necropsy.
And (3) test results:
clinical signs: after administration, both the male and female animals observed obvious toxic signs related to administration, and no death occurred during the observation period.
A change in body weight; the body weights of the animals in each group were not significantly abnormal on day 0, 7 and 14 of infection. Gross pathology examination results: at the end of the observation period of 14 days, the surviving animals were generally not significantly abnormal by necropsy.
And (4) test conclusion:
in 3 samples in all of examples 1-3, under the test condition, the ICR mice are gavaged with 5000mg/kg of body weight to give the test sample of the tobacco stalk fiber-containing functional cigarette paper, and the male and female mice do not die and have obvious toxicity. The test substance is used for acute oral administration of half Lethal Dose (LD) of ICR mice50) Both female and male>5000mg/kg body weight.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. A production method of functional cigarette paper is characterized by comprising the following steps:
(1) the functional cigarette paper comprises the following raw materials in parts by weight: 5-30 parts of tobacco stalk fibers, 70-95 parts of wood pulp fibers, 15-50 parts of fillers, 0.5-5 parts of auxiliaries and 1.5-8 parts of combustion improver; firstly, the tobacco stems are steamed, and the specific control process of the steaming is as follows: the method comprises the following steps of (1) steaming tobacco stems by adopting a caustic soda method, a sulfate method, alkaline sodium sulfite, neutral ammonium sulfite or a neutral sodium sulfite method, wherein the liquid medicine amount is 5.0-20.0%, and the liquid ratio is as follows: 1: (2-8); the initial liquid medicine temperature is 60-80 ℃, the temperature is raised for the first time after the idle operation is carried out for 60-120 min, the temperature is raised for the second time after the air is discharged for 5-30 min when reaching 100-125 ℃, the temperature is raised to 130-170 ℃, the temperature is kept for 1-5 h, then the materials are discharged, the hardness of the discharged materials is 10.0-20.0 KaPPa, the residual alkali in the black liquid is less than or equal to 18g/l, the cooking yield is 60-70%, and the D65 brightness is greater than or equal to 40%;
(2) rinsing the steamed tobacco stems, wherein the specific control process of the rinsing treatment is as follows: washing the steamed tobacco stems for 2-7 hours by using water, bleaching the washed tobacco stems for the first time by using a peracetic acid solution with the mass concentration of 0.3-2.0%, wherein the addition amount of the peracetic acid is 2-15% of the dry weight of the tobacco stems, and simultaneously adding sodium pyrophosphate as a stabilizer of the peracetic acid, wherein the addition amount of the sodium pyrophosphate is 0.1-5% of the dry weight of the tobacco stems; washing the tobacco stems subjected to first-stage bleaching for 2-7 hours by using water, and performing second-stage bleaching on the washed tobacco stems by using a hydrogen peroxide solution with the mass concentration of 2-40%, wherein the addition amount of the hydrogen peroxide is 6-12% of the dry weight of the tobacco stems, and meanwhile, a sodium silicate solution with the mass concentration of 1-15% and a magnesium sulfate solution with the mass concentration of 0.5-10% are added as hydrogen peroxide protective agents, the addition amount of the sodium silicate is 1-12% of the dry weight of the tobacco stems, and the addition amount of the magnesium sulfate is 0.1-2% of the dry weight of the tobacco stems; washing the two-stage bleached tobacco stems for 10-15 h by using water, wherein the brightness of D65 of the obtained rinsed tobacco stems is more than or equal to 60%, the chlorine root after washing is less than or equal to 0.1g/l, the concentration of washing slurry is 2-8%, the rinsing yield is 30-40%, and the knocking degree of the bleached tobacco stems: 30-90 ° SR, wet weight: 0.5-5 g;
(3) continuously pulping bleached wood pulp and bleached tobacco stalks respectively, mixing, and adding a filler to obtain mixed synthetic pulp;
(4) diluting the mixed slurry, adding an auxiliary agent, and performing dewatering and embossing treatment on a mesh part forming and pressing part to obtain wet paper sheets;
(5) and (2) carrying out pre-drying and drying treatment on the wet paper to obtain a semi-dry paper, coating a combustion improver solution on the surface of the semi-dry paper, carrying out post-drying and drying treatment again, and coiling to obtain the functional cigarette paper, wherein the combustion improver is coated on one side surface of the functional cigarette paper.
2. The production method of the functional cigarette paper as claimed in claim 1, wherein the filler is calcium carbonate powder with the particle size of less than or equal to 4.5 μm.
3. The production method of the functional cigarette paper is characterized in that the auxiliary agent is one or more selected from sodium hydroxide, sodium sulfide, sodium oxide, sodium sulfite, sodium carbonate, peracetic acid, sodium pyrophosphate, hydrogen peroxide, magnesium sulfate, sodium silicate, guar gum reinforcing agent, guar gum retention aid and defoaming agent.
4. The production method of the functional cigarette paper according to claim 1, wherein the combustion improver is a mixture compounded by at least three of potassium citrate, potassium fumarate, potassium malate, sodium malate, potassium carbonate, sodium carbonate, potassium tartrate and potassium gluconate.
5. The production method of the functional cigarette paper as claimed in the claim 1, wherein the moisture content of the wet paper sheet in the step (4) is 40-60%.
6. The production method of the functional cigarette paper as claimed in claim 1, wherein the temperature of the pre-drying treatment in the step (5) is 65-105 ℃, and the moisture content of the semi-dry paper is 3-10%; the temperature of the post-drying treatment is 95-110 ℃.
7. The method for producing a functional cigarette paper according to claim 1, wherein the performance indexes of the functional cigarette paper are as follows: quantification: 25-45 g per square meter; longitudinal tensile strength: not less than 0.98 kN/m; air permeability: 15 to 110 CU; the opacity of the green light is more than or equal to 73.0 percent; longitudinal tensile energy absorption is more than or equal to 7.0J/m; ash content calculated as CaO: 10-25%; moisture content: 3-6%.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220930A (en) * | 1992-02-26 | 1993-06-22 | R. J. Reynolds Tobacco Company | Cigarette with wrapper having additive package |
| US20050016556A1 (en) * | 2001-08-14 | 2005-01-27 | Ashcraft Charles Ray | Wrapping materials for smoking articles |
| CN101708071A (en) * | 2009-12-24 | 2010-05-19 | 广东中烟工业有限责任公司 | Method for treating tobacco stem |
| CN102277780A (en) * | 2011-07-19 | 2011-12-14 | 湖北中烟工业有限责任公司 | Production method of tobacco sheet cigarette paper |
| CN106108104A (en) * | 2015-12-18 | 2016-11-16 | 广东中烟工业有限责任公司 | A kind of reduce the processing method of content of lignin in cabo |
| CN106283884A (en) * | 2016-08-15 | 2017-01-04 | 云南红塔蓝鹰纸业有限公司 | A kind of high-air-permeability sheet type cigarette paper being applicable to cigar and preparation method thereof |
-
2019
- 2019-08-20 CN CN201910766555.XA patent/CN110552250B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220930A (en) * | 1992-02-26 | 1993-06-22 | R. J. Reynolds Tobacco Company | Cigarette with wrapper having additive package |
| US20050016556A1 (en) * | 2001-08-14 | 2005-01-27 | Ashcraft Charles Ray | Wrapping materials for smoking articles |
| CN101708071A (en) * | 2009-12-24 | 2010-05-19 | 广东中烟工业有限责任公司 | Method for treating tobacco stem |
| CN102277780A (en) * | 2011-07-19 | 2011-12-14 | 湖北中烟工业有限责任公司 | Production method of tobacco sheet cigarette paper |
| CN106108104A (en) * | 2015-12-18 | 2016-11-16 | 广东中烟工业有限责任公司 | A kind of reduce the processing method of content of lignin in cabo |
| CN106283884A (en) * | 2016-08-15 | 2017-01-04 | 云南红塔蓝鹰纸业有限公司 | A kind of high-air-permeability sheet type cigarette paper being applicable to cigar and preparation method thereof |
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