CN105146719B - A kind of method of calcium carbonate retention rate in raising papermaking-method reconstituted tobaccos - Google Patents

Abstract

The present invention relates to a kind of method for improving calcium carbonate retention rate in papermaking-method reconstituted tobaccos, be added to calcium carbonate in the offal slurry of certain beating degree by the method, calcium carbonate is set fully to adsorb to form compound with offal slurry, wrapped up with carboxymethylcellulose calcium, form larger wadding aggressiveness, again with aluminum sulfate to poly- surface modification and the disposal of stability of wadding a quilt with cotton, reconstituted tobacco is processed into through manufacturing paper with pulp, squeeze, be coated with, dry, cut after modified calcium carbonate is mixed with tobacco slurry by multiple elements design retention aid and filtering aid system.Adhesion using the modified calcium carbonate of this method and slurry strengthens, and not easily runs off, and retention of the modified calcium carbonate in reconstituted tobacco is high.

Description

A method for improving the retention rate of calcium carbonate in reconstituted tobacco leaves by papermaking

【Technical field】

The invention belongs to tobacco processing technology, and relates to the field of reconstituted tobacco leaf production by papermaking method. It is a method of firstly using tobacco stem slurry to absorb calcium carbonate to form a compound, and then combining carboxymethyl cellulose to coat and modify the compound. A method for improving the effective retention rate of calcium carbonate in reconstituted tobacco leaves by the papermaking method by using a retention rate system.

【Background technique】

Reconstituted tobacco leaves are also known as reconstituted tobacco leaves, tobacco flakes, homogeneous tobacco leaves, etc. Foreign countries began to study the use of paper-making reconstituted tobacco leaves in the middle of the last century. The domestic paper-making reconstituted tobacco industry developed and started relatively late, but the development speed and technological progress were relatively fast. It has a strong functional role in enhancing flavor and moisturizing, highlighting the style characteristics of cigarette products, etc. At present, reconstituted tobacco leaves by papermaking method have become an important and indispensable raw material for Chinese-style cigarettes.

The processing methods of reconstituted tobacco generally include the following methods, such as rolling method, papermaking method, thick slurry method, soaking method, microchip method, etc., among which the papermaking method is the most important processing method for reconstituted tobacco leaves. Papermaking reconstituted tobacco leaves are mainly raw materials such as tobacco stems, chips, tobacco powder, ash sticks, and low-grade tobacco leaves produced during the process of cigarettes and threshing and redrying, together with other non-tobacco fiber raw materials, additives, etc., after leaching, Concentrating, beating, copying, coating, drying, cutting and other processes to make a shape close to natural tobacco leaves.

Tobacco stems and shreds The main tobacco raw material used in reconstituted tobacco leaves by the papermaking process in the tobacco industry. Tobacco stems mainly provide the fibers of reconstituted tobacco leaves, and fragments can provide better aroma substances, which are the main source of aroma substances in reconstituted tobacco leaves. However, the cellulose content in tobacco raw materials such as tobacco stems and chips is low, and the effect of adding non-fibers is mainly to increase the cellulose content in the pulp, increase the physical strength of the sheet base, and facilitate subsequent processing. At present, domestic reconstituted tobacco leaf production enterprises all use non-tobacco fiber raw materials such as wood pulp.

Calcium carbonate is an important additive in the production process of paper-making reconstituted tobacco leaves. According to different calcium carbonate production methods, calcium carbonate is divided into light calcium carbonate, heavy calcium carbonate, colloidal calcium carbonate and crystalline calcium carbonate. At present, most papermaking methods Reconstituted tobacco leaf manufacturers all use light calcium carbonate as filler. Calcium carbonate can effectively improve the physical properties and permeability of the sheet base, and reduce the release of tar and CO in reconstituted tobacco products.

The traditional method of using calcium carbonate is generally to directly add it into the tobacco stem slurry according to a certain design ratio, and mix it with the slurry evenly by mechanical stirring. Compared with tobacco pulp, the particle size of calcium carbonate is very small, and the net loss is serious in the process of papermaking. Therefore, it is difficult to achieve the balance between the two only by pure physical adsorption between calcium carbonate and tobacco pulp. Effective flocculation, resulting in the loss of a large amount of calcium carbonate in vain. In actual production, in order to increase the retention rate, it is necessary to increase the amount of calcium carbonate used. As a result, more calcium carbonate will be lost into the white water, which will increase the cost, reduce the quality of reused white water, and increase the energy consumption of sewage treatment. And water consumption per ton of product.

In actual production, the retention rate is generally used to measure the effective utilization rate of calcium carbonate in the papermaking process of reconstituted tobacco leaves. At present, in the process of adding calcium carbonate to reconstituted tobacco leaves by the papermaking method, there is a common problem of low retention rate, which directly affects the quality of reconstituted tobacco leaves. In recent years, the research on improving the retention rate of calcium carbonate has always been a difficulty and hot spot in the field of papermaking reconstituted tobacco.

Studies have shown that (a) adding external fiber can improve the retention rate of calcium carbonate and the quality of tobacco leaf paper base. Patent CN201210190343 introduces a method of adding wood pulp fiber to tobacco raw material pulp during sheeting to improve the quality of reconstituted tobacco paper base.

(b) Changing the calcium carbonate addition method can improve the retention rate of calcium carbonate. Patent CN 101822419 A introduces a method for increasing the retention rate of calcium carbonate in the base of reconstituted tobacco leaves by papermaking method by adding soluble carbonate solution to the slurry. Patent CN 103919271 A introduces a method of firstly mixing tobacco pulp and calcium carbonate for beating, and then adding additional fiber and chitosan retention aid to improve the retention rate of calcium carbonate.

(c) In the paper industry, fillers are often coated and modified to improve the retention rate of fillers. Wang Huiping reported that the use of epichlorohydrin crosslinked cationic starch to coat and modify ground calcium carbonate can improve the high filling rate. Tensile strength, bursting strength and filler retention rate of paper [China Paper, 2010, 1 (29)]; Shen Jing reported that calcium carbonate was coated with carboxymethyl cellulose/aluminum sulfate to improve the quality of high-fill paper. Mechanical properties and calcium carbonate retention (Carbohydrate Polymer, 2010, 81). However, there are relatively few such studies in the field of tobacco processing. Patent CN 103859576 A introduces a method of wrapping calcium carbonate filler using natural potato starch as a wrapping agent, using a charge regulator to adjust the surface charge of the pulp fiber, and wrapping the wrapped filler It is added to tobacco pulp to improve the retention rate of fibers and fillers.

(d) Use retention aids to improve the retention rate of calcium carbonate in the film base to a certain extent, among which chitosan, guar gum, etc. have better retention and drainage effects. Patent CN 102715641 A introduces a method for improving the quality of reconstituted tobacco leaf paper base by adding calcium carbonate, wood pulp fiber and guar gum to tobacco slurry in the sheeting step. Patent CN 102715642 A introduces a method for improving the quality of reconstituted tobacco leaf paper base by adding calcium carbonate and guar gum to tobacco slurry in the sheeting step. Hu Huiren reported that the chitosan/bentonite particle binary retention and drainage system was used to improve the retention rate of tobacco pulp and filler, and improve the quality of tobacco leaf substrate [China Paper, 2011, 4(30)]. At present, most domestic reconstituted tobacco leaf enterprises use chitosan, guar gum, etc. in production to improve retention and drainage performance.

In other respects, patent CN 103829364 A introduces a salt coating solution to improve the retention rate and distribution uniformity of calcium carbonate on reconstituted tobacco leaves, thereby improving the moisture retention performance, physical properties and sensory evaluation of reconstituted tobacco leaves. Methods.

The above research shows that by changing the way of adding calcium carbonate, adding wood pulp fiber and using chitosan, guar gum additives and other measures, although the retention rate of calcium carbonate in the film base and the physical indicators of the film base can be improved to a certain extent . However, most of them stay in the laboratory stage, and there are problems such as poor operability and poor use effect in the actual production process, resulting in the effective retention rate of calcium carbonate in the film base in the actual production process still failing to meet the expected requirements. In the present invention, firstly, the tobacco stem slurry is used to absorb calcium carbonate to form a composite, and then combined with carboxymethyl cellulose to coat and modify the composite, and finally, the retention rate of calcium carbonate is comprehensively improved by means of a multi-element retention aid rate system, according to Our literature survey has not yet found relevant reports.

【Content of invention】

[Technical problem to be solved]

In order to overcome the defects in the existing methods of using calcium carbonate in the production process of reconstituted tobacco leaves by the existing papermaking method, the technical problem to be solved by the present invention is to provide a method that first absorbs calcium carbonate through the tobacco stem slurry to form a composite, and then combines carboxymethyl cellulose The compound is coated and modified, and finally the effective retention rate of calcium carbonate in reconstituted tobacco leaves by papermaking method is improved by means of multi-component retention aid rate system.

In order to achieve the above object, the present invention uses the tobacco stem slurry to pretreat the calcium carbonate, and adds the calcium carbonate to the tobacco stem slurry with a certain beating degree, firstly makes the calcium carbonate and the tobacco stem slurry form a compound, and then uses the carboxylate Methyl cellulose wraps and modifies the composite to make flocs, and uses surfactants and cross-linking agents to modify the surface of the flocs. On this basis, the slurry is treated with multi-component composite retention and drainage systems such as chitosan, guar gum and bentonite. According to the existing production process of paper-making reconstituted tobacco leaves, it is processed into paper-making reconstituted tobacco leaves through processes such as papermaking, pressing, coating, drying, and cutting.

[Technical solutions]

The present invention is achieved through the following technical solutions.

A method for improving the retention rate of calcium carbonate in reconstituted tobacco leaves by papermaking method, comprising the following steps:

Step A: Soak the tobacco stems in water for extraction, and the extracted solids are prepared into a tobacco stem slurry with a beating degree of 15-35°SR through a silk rolling machine and a refiner;

Step B: prepare a calcium carbonate solution with a concentration of 2.0-5.0%, and set it aside;

Step C: Take tobacco stem slurry of 20-80% relative to the mass of calcium carbonate, add it to the calcium carbonate solution in step B, and stir at a stirring frequency of 200-500 rpm for 10-60 minutes to obtain calcium carbonate and tobacco stem slurry composite;

Step D: Add 1-15% carboxymethyl cellulose relative to the mass of calcium carbonate to the calcium carbonate and tobacco stem slurry compound in step C, and then under the conditions of a temperature of 10-60°C and a stirring frequency of 200-500rpm Stirring for 10 to 60 minutes to obtain the calcium carbonate and tobacco stem slurry composite coated with carboxymethyl cellulose;

Step E: Add 0-5.0% aluminum sulfate relative to the mass of calcium carbonate to the carboxymethyl cellulose-coated calcium carbonate and tobacco stem slurry compound in step D, and then heat the mixture at a temperature of 10-60°C and a stirring frequency of 200 Stirring under the condition of ~500rpm for 10-60min to obtain the modified calcium carbonate and tobacco stem slurry compound;

Step F: Taking the compound of modified calcium carbonate and tobacco stem slurry in step E according to the calcium carbonate mass accounting for 5-50% of the absolute dry mass of the tobacco slurry and stirring evenly with the tobacco slurry to obtain a tobacco mixed slurry;

Step G: Take 0-0.7% chitosan, 0-0.5% guar gum, and 0-1.5% bentonite relative to the absolute dry mass of tobacco pulp to prepare a multi-component composite retention and drainage system solution; The multi-component composite retention and drainage system solution is added to the tobacco mixed slurry, and stirred for 10-60min at a temperature of 10-60°C and a stirring frequency of 200-500rpm; processed into reconstituted tobacco leaves.

According to specific embodiments of the present invention, described calcium carbonate is light calcium carbonate.

According to a specific embodiment of the present invention, the beating degree of the tobacco pulp is 10-40°SR.

According to a specific embodiment of the present invention, in the step C, 30-80% of the tobacco stem slurry relative to the calcium carbonate mass is added to the calcium carbonate solution in step B and stirred at a stirring frequency of 200-500rpm for 30-60min A calcium carbonate and tobacco stem slurry compound is obtained.

According to a specific embodiment of the present invention, in the step D, 5-10% carboxymethyl cellulose relative to the mass of calcium carbonate is added.

According to a specific embodiment of the present invention, in the step E, 0.15-1.2% of aluminum sulfate relative to the mass of calcium carbonate is added.

According to a specific embodiment of the present invention, the raw materials used in the tobacco pulp include tobacco stems, chips, wood pulp, and one or more of tobacco dust, ash sticks, low-grade tobacco leaves, and non-tobacco fibers.

According to a specific embodiment of the present invention, the beating degree of the tobacco slurry is 20-30°SR.

According to a specific embodiment of the present invention, in step F, the modified calcium carbonate and tobacco stem slurry compound in step E is measured according to the calcium carbonate mass accounting for 10% to 35% of the absolute dry mass of tobacco slurry and stirred evenly with the tobacco slurry, A tobacco mixed slurry is obtained.

According to a specific embodiment of the present invention, the tobacco stems are one or more of tobacco stems produced during threshing and redrying, short stems screened during cigarette processing, and stems screened during cigarette processing. kind.

The present invention will be further described below.

A method for improving the retention rate of calcium carbonate in reconstituted tobacco leaves by papermaking method, comprising the following steps:

Step A: Soak the tobacco stems in water for extraction, and the extracted solids are prepared into a tobacco stem slurry with a beating degree of 15-35°SR through a silk rolling machine and a refiner; wherein the solid-liquid ratio of the tobacco stem extraction is 1:5- 1:10;

Step B: prepare a calcium carbonate solution with a concentration of 2.0-5.0%, and set it aside;

Step C: Take the tobacco stem slurry of 20-80% relative to the calcium carbonate mass and add it to the calcium carbonate solution in step B, and stir at a temperature of 10-60° C. at a stirring frequency of 200-500 rpm for 10-60 minutes to obtain calcium carbonate and tobacco stems slurry compound;

Step D: Add 1-15% carboxymethyl cellulose relative to the mass of calcium carbonate to the calcium carbonate and tobacco stem slurry compound in step C, and then under the conditions of a temperature of 10-60°C and a stirring frequency of 200-500rpm Stirring for 10 to 60 minutes to obtain the calcium carbonate and tobacco stem slurry composite coated with carboxymethyl cellulose;

Step E: Add 0-5.0% aluminum sulfate relative to the mass of calcium carbonate to the carboxymethyl cellulose-coated calcium carbonate and tobacco stem slurry compound in step D, and then heat the mixture at a temperature of 10-60°C and a stirring frequency of 200 Stirring under the condition of ~500rpm for 10-60min to obtain the modified calcium carbonate and tobacco stem slurry compound;

Step F: Taking the compound of modified calcium carbonate and tobacco stem slurry in step E according to the calcium carbonate mass accounting for 5-50% of the absolute dry mass of the tobacco slurry and stirring evenly with the tobacco slurry to obtain a tobacco mixed slurry;

Step G: Take 0-0.7% chitosan, 0-0.5% guar gum, and 0-1.5% bentonite relative to the absolute dry mass of tobacco pulp to prepare a multi-component composite retention and drainage system solution; The multi-component composite retention and drainage system solution is added to the tobacco mixed slurry, and stirred for 10-60min at a temperature of 10-60°C and a stirring frequency of 200-500rpm; processed into reconstituted tobacco leaves.

Stirring and mixing the tobacco stem slurry and calcium carbonate is to adsorb the calcium carbonate on the tobacco stem slurry; adding carboxymethyl cellulose is to coat the surface of the composite after contacting with the calcium carbonate and tobacco stem slurry composite Form larger flocs; the addition of aluminum sulfate is to make carboxymethyl cellulose cross-linked under the action of aluminum sulfate to form stable flocs.

In this method, the tobacco stems are first prepared into a certain beating degree of tobacco stem slurry and then mixed with calcium carbonate, rather than the tobacco stems and calcium carbonate are mixed and then prepared into a certain beating degree of tobacco stem slurry. For tobacco stems, the particle size of calcium carbonate is very small, and the loss of the net part is serious during the copying process. Therefore, it is difficult to achieve effective flocculation between the two only by pure physical adsorption between calcium carbonate and tobacco stems, resulting in A large amount of calcium carbonate is lost in vain. By combining the tobacco stem slurry with a certain beating degree and calcium carbonate, the calcium carbonate can be effectively adsorbed on the tobacco stem.

In the present invention, the multi-component composite retention and drainage system solution is 0-0.7% of chitosan, 0-0.5% of guar gum, and 0-1.5% of bentonite relative to the dry mass of tobacco pulp. Prepare a solution with a mass fraction of 1-5%. According to a preferred embodiment of the present invention, the multi-component composite retention and drainage system solution is obtained by taking 0.1-0.5% chitosan, 0.1-0.5% guar gum, 0.2-1.2 % bentonite is formulated into a solution with a mass fraction of 1-5%.

According to a specific embodiment of the present invention, the tobacco stems are one or more of tobacco stems produced in the process of threshing and redrying, fragments screened in the process of shredded processing, and low-grade tobacco leaves.

According to specific embodiments of the present invention, described calcium carbonate is light calcium carbonate.

According to a specific embodiment of the present invention, the beating degree of the tobacco pulp is 10-40°SR. According to a preferred embodiment of the present invention, the beating degree of the tobacco pulp is 20-40°SR.

According to a specific embodiment of the present invention, in the step C, 30-80% of the tobacco stem slurry relative to the calcium carbonate mass is added to the calcium carbonate solution in step B and stirred at a stirring frequency of 200-500rpm for 30-60min A calcium carbonate and tobacco stem slurry compound is obtained.

According to a specific embodiment of the present invention, in the step D, 5-10% carboxymethyl cellulose relative to the mass of calcium carbonate is added.

According to a specific embodiment of the present invention, in the step E, 0.15-1.2% of aluminum sulfate relative to the mass of calcium carbonate is added. According to a preferred embodiment of the present invention, in the step E, 0.5-1.2% aluminum sulfate relative to the mass of calcium carbonate is added. According to a more preferred embodiment of the present invention, in the step E, 0.8-1.2% aluminum sulfate relative to the mass of calcium carbonate is added.

According to a specific embodiment of the present invention, the raw materials used in the tobacco pulp include tobacco stems, chips, wood pulp, and one or more of tobacco dust, ash sticks, low-grade tobacco leaves, and non-tobacco fibers. That is, the raw materials used in the tobacco pulp include tobacco stems, chips, and wood pulp, and may also include one or more of tobacco dust, ash sticks, low-grade tobacco leaves, and non-tobacco fibers. In a specific embodiment of the present invention, the tobacco stem is one of the tobacco stems produced during the threshing and redrying process, the short stems screened during the cigarette processing process, and the stems screened during the cigarette processing process or several.

According to a preferred embodiment of the present invention, in step F, the modified calcium carbonate and tobacco stem slurry compound in step E is measured according to the calcium carbonate mass accounting for 10% to 35% of the absolute dry mass of tobacco slurry and stirred evenly with the tobacco slurry, A tobacco mixed slurry is obtained.

According to a preferred embodiment of the present invention, the tobacco stems are one or more of tobacco stems produced during threshing and redrying, short stems screened during cigarette processing, and stems screened during cigarette processing. kind.

[beneficial effect]

The present invention starts from the characteristics of the calcium carbonate used in the reconstituted tobacco leaves by the papermaking method, and adds calcium carbonate to the tobacco stem slurry with a certain degree of beating, so that the calcium carbonate and the tobacco stem slurry are fully adsorbed to form a composite, and carboxymethyl cellulose is used to Wrapping to form larger flocs, and then modifying and stabilizing the surface of the flocs with surfactants and cross-linking agents, the modified calcium carbonate has a stronger binding force with the slurry and is not easy to be lost. The retention rate of modified calcium carbonate in reconstituted tobacco leaf base is high.

The one-way retention rate of calcium carbonate in the film base by the traditional direct addition method is generally 10-50%, but the method of the present invention can increase the one-way retention rate of calcium carbonate to 80-95%, and the effective utilization rate of calcium carbonate is greatly improved , which can effectively reduce the production cost and improve the base quality of reconstituted tobacco leaves.

Compared with the traditional method, the method used in the present invention has a simple process flow and is easy to operate. The reconstituted tobacco leaves produced by the papermaking method have a loose base, a high filling value, and good combustibility. The release of tar and CO is low, and the sensory quality is significantly better than the current one. There is a method, which has a high value of promotion and application.

【detailed description】

The present invention will be better understood by the following examples.

Example 1:

Step A: Soak the tobacco stems in water for extraction, and the extracted solids are prepared into a tobacco stem slurry with a beating degree of 22°SR through a thread rolling machine and a refiner; wherein the solid-liquid ratio of tobacco stem extraction is 1:6;

Step B: prepare a calcium carbonate solution with a concentration of 2.0%, and set aside;

Step C: Take tobacco stem slurry of 35% relative to the mass of calcium carbonate and add it to the calcium carbonate solution in step B, and stir for 30 minutes at a temperature of 25° C. and a stirring frequency of 280 rpm to obtain a composite of calcium carbonate and tobacco stem slurry;

Step D: Add carboxymethyl cellulose of 4% relative to the mass of calcium carbonate to the calcium carbonate and tobacco stem slurry compound in step C, and then stir for 25 minutes at a temperature of 25° C. and a stirring frequency of 280 rpm to obtain carboxymethyl cellulose A cellulose-coated calcium carbonate and tobacco stem size composite;

Step E: Add 3.0% aluminum sulfate relative to the mass of calcium carbonate to the carboxymethylcellulose-coated calcium carbonate and tobacco stem slurry compound in step D, and then stir at a temperature of 25°C and a stirring frequency of 300rpm Obtain modified calcium carbonate and tobacco stem slurry compound in 50min;

Step F: Take the compound of modified calcium carbonate and tobacco stem slurry in step E according to the calcium carbonate mass accounting for 25% of the absolute dry mass of the tobacco slurry and stir evenly with the SR tobacco slurry with a beating degree of 10° to obtain a tobacco mixed slurry ;

Step G: Take 0.4% chitosan, 0.2% guar gum, and 0.8% bentonite relative to the absolute dry mass of tobacco pulp to prepare a multi-component composite retention and drainage system solution; Add the filter system solution to the tobacco mixed slurry, and stir for 25 minutes at a temperature of 30°C and a stirring frequency of 400 rpm;

In the embodiment of the present invention, the raw materials used in the tobacco slurry are chips produced in the process of threshing and redrying, tobacco stems produced in the process of threshing and redrying, chips screened in the process of silk making, and low-grade tobacco leaves. mix.

The retention rate of calcium carbonate in reconstituted tobacco leaves was determined to be 81.27% according to the tobacco industry standard "YC/T 314-2009 Determination of Calcium Carbonate in Cigarette Paper by Potentiometric Titration".

The physical and chemical indicators of the obtained reconstituted tobacco leaf products meet the requirements of the national standard. The sensory quality has been evaluated by experts. The aroma is pure, the smoke is delicate and transparent, the woodiness is small, the irritation is small, and the taste is pure and comfortable.

The obtained reconstituted tobacco leaves are added to cigarette products at a rate of 10%. Compared with the cigarette products without adding reconstituted tobacco leaves, the tar is reduced from 12.28mg/cigarette to 11.58mg/cigarette, and the CO is reduced from 12.36mg/cigarette to 11.47mg/cigarette.

Example 2:

Step A: Soak the tobacco stems in water for extraction, and the extracted solids are prepared into a tobacco stem slurry with a beating degree of 28°SR through a silk rolling machine and a refiner; wherein the solid-liquid ratio of tobacco stem extraction is 1:5;

Step B: preparing a calcium carbonate solution with a concentration of 2.5%, for subsequent use;

Step C: Take tobacco stem slurry of 45% relative to the mass of calcium carbonate and add it to the calcium carbonate solution in step B, and stir at a temperature of 35° C. at a stirring frequency of 400 rpm for 30 minutes to obtain a composite of calcium carbonate and tobacco stem slurry;

Step D: Add 6% carboxymethyl cellulose relative to the mass of calcium carbonate to the calcium carbonate and tobacco stem slurry compound in step C, and then stir for 20 minutes at a temperature of 35° C. and a stirring frequency of 400 rpm to obtain carboxymethyl cellulose A cellulose-coated calcium carbonate and tobacco stem size composite;

Step E: Add 5.0% aluminum sulfate relative to the mass of calcium carbonate to the carboxymethyl cellulose-coated calcium carbonate and tobacco stem slurry compound in step D, and then stir at a temperature of 35°C and a stirring frequency of 400rpm Obtain modified calcium carbonate and tobacco stem slurry compound in 20min;

Step F: Take the compound of modified calcium carbonate and tobacco stem slurry in step E according to the calcium carbonate mass accounting for 30% of the absolute dry mass of the tobacco slurry and stir evenly with the SR tobacco slurry with a beating degree of 30° to obtain a tobacco mixed slurry ;

Step G: Take 0.2% chitosan, 0.2% guar gum, and 1.0% bentonite relative to the absolute dry mass of tobacco pulp to prepare a multi-component composite retention and drainage system solution; Add the filter system solution to the tobacco mixed slurry, and stir for 40 minutes at a temperature of 45°C and a stirring frequency of 350 rpm;

In the embodiment of the present invention, the raw materials used in the tobacco slurry are chips produced in the process of threshing and redrying, tobacco stems produced in the process of threshing and redrying, chips screened in the process of silk making, and low-grade tobacco leaves. mix.

The calcium carbonate retention rate in the reconstituted tobacco leaves was tested according to the tobacco industry standard "YC/T 314-2009 Determination of Calcium Carbonate in Cigarette Paper Potentiometric Titration Method", and the calcium carbonate retention rate in the reconstituted tobacco leaves was 83.29%.

The physical and chemical indicators of the obtained reconstituted tobacco leaf products meet the requirements of the national standard. The sensory quality has been evaluated by experts. The aroma is pure, the smoke is delicate and transparent, the woodiness is small, the irritation is small, and the taste is pure and comfortable.

The obtained reconstituted tobacco leaves are added to cigarette products at a rate of 5%. Compared with the cigarette products without adding reconstituted tobacco leaves, the tar is reduced from 12.28mg/cigarette to 11.63mg/cigarette, and the CO is reduced from 12.36mg/cigarette to 11.59mg/cigarette.

Example 3:

Step A: Soak the tobacco stems in water for extraction, and the extracted solids are prepared into a tobacco stem slurry with a beating degree of 32°SR through a silk rolling machine and a refiner; wherein the solid-liquid ratio of the tobacco stem extraction is 1:8;

Step B: prepare a calcium carbonate solution with a concentration of 4.0%, and set aside;

Step C: Add the tobacco stem slurry of 70% relative to the mass of calcium carbonate to the calcium carbonate solution in step B and stir for 30 minutes at a temperature of 50° C. and a stirring frequency of 320 rpm to obtain a composite of calcium carbonate and tobacco stem slurry;

Step D: Add carboxymethyl cellulose of 8% relative to the mass of calcium carbonate to the calcium carbonate and tobacco stem slurry compound in step C, and then stir for 40 minutes at a temperature of 50° C. and a stirring frequency of 320 rpm to obtain carboxymethyl cellulose A cellulose-coated calcium carbonate and tobacco stem size composite;

Step E: Add 5.0% aluminum sulfate relative to the mass of calcium carbonate to the carboxymethylcellulose-coated calcium carbonate and tobacco stem slurry compound in step D, and then stir at a temperature of 50°C and a stirring frequency of 320rpm Obtain modified calcium carbonate and tobacco stem slurry compound in 30min;

Step F: Take the compound of modified calcium carbonate and tobacco stem slurry in step E according to the calcium carbonate mass accounting for 45% of the absolute dry mass of the tobacco slurry and stir evenly with the SR tobacco slurry with a beating degree of 30° to obtain a tobacco mixed slurry ;

Step G: Take 0.2% chitosan, 0.4% guar gum, and 0.2% bentonite relative to the absolute dry mass of tobacco pulp to prepare a multi-component composite retention and drainage system solution; Add the filter system solution to the tobacco mixed slurry, and stir for 35 minutes at a temperature of 25°C and a stirring frequency of 350 rpm;

In the embodiment of the present invention, the raw materials used in the tobacco slurry are chips produced in the process of threshing and redrying, tobacco stems produced in the process of threshing and redrying, chips screened in the process of silk making, and low-grade tobacco leaves. mix.

The calcium carbonate retention rate in the reconstituted tobacco leaves was tested according to the tobacco industry standard "YC/T 314-2009 Determination of Calcium Carbonate in Cigarette Paper Potentiometric Titration Method", and the calcium carbonate retention rate in the reconstituted tobacco leaves was 85.34%.

The physical and chemical indicators of the obtained reconstituted tobacco leaf products meet the requirements of the national standard. The sensory quality has been evaluated by experts. The aroma is pure, the smoke is delicate and transparent, the woodiness is small, the irritation is small, and the taste is pure and comfortable.

The obtained reconstituted tobacco leaves are added to cigarette products at a rate of 15%. Compared with the cigarette products without reconstituted tobacco leaves, the tar is reduced from 12.28mg/cigarette to 10.45mg/cigarette, and the CO is reduced from 12.36mg/cigarette to 10.32mg/cigarette.

Example 4:

Step A: Soak the tobacco stems in water for extraction, and the extracted solids are prepared into a tobacco stem slurry with a beating degree of 10°SR through a silk rolling machine and a refiner; wherein the solid-liquid ratio of tobacco stem extraction is 1:10;

Step B: prepare a calcium carbonate solution with a concentration of 5.0%, and set aside;

Step C: Take the tobacco stem slurry of 100% relative to the calcium carbonate mass and add it to the calcium carbonate solution in step B, and stir at a temperature of 15° C. at a stirring frequency of 500 rpm for 35 minutes to obtain a composite of calcium carbonate and tobacco stem slurry;

Step D: Add 15% carboxymethyl cellulose relative to the mass of calcium carbonate to the calcium carbonate and tobacco stem slurry compound in step C, and then stir for 30 minutes at a temperature of 35° C. and a stirring frequency of 400 rpm to obtain carboxymethyl cellulose A cellulose-coated calcium carbonate and tobacco stem size composite;

Step E: Add 1.0% aluminum sulfate relative to the mass of calcium carbonate to the carboxymethylcellulose-coated calcium carbonate and tobacco stem slurry compound in step D, and then stir at a temperature of 45°C and a stirring frequency of 400rpm Obtain modified calcium carbonate and tobacco stem slurry compound in 40min;

Step F: Take the compound of modified calcium carbonate and tobacco stem slurry in step E according to the calcium carbonate mass accounting for 30% of the absolute dry mass of the tobacco slurry and stir evenly with the SR tobacco slurry with a beating degree of 40° to obtain a tobacco mixed slurry ;

Step G: Take 0.1% chitosan, 0.5% guar gum, and 0.5% bentonite relative to the absolute dry mass of tobacco pulp to prepare a multi-component composite retention and drainage system solution; Add the filter system solution to the tobacco mixed slurry, and stir for 40 minutes at a temperature of 40° C. and a stirring frequency of 300 rpm;

In the embodiment of the present invention, the raw materials used in the tobacco slurry are chips produced in the process of threshing and redrying, tobacco stems produced in the process of threshing and redrying, chips screened in the process of silk making, and low-grade tobacco leaves. mix.

The calcium carbonate retention rate in the reconstituted tobacco leaves was tested according to the tobacco industry standard "YC/T 314-2009 Determination of Calcium Carbonate in Cigarette Paper Potentiometric Titration Method", and the calcium carbonate retention rate in the reconstituted tobacco leaves was 81.39%.

The physical and chemical indicators of the obtained reconstituted tobacco leaf products meet the requirements of the national standard. The sensory quality has been evaluated by experts. The aroma is pure, the smoke is delicate and transparent, the woodiness is small, the irritation is small, and the taste is pure and comfortable.

The obtained reconstituted tobacco leaves are added to cigarette products at a rate of 10%. Compared with the cigarette products without adding reconstituted tobacco leaves, the tar is reduced from 12.28mg/cigarette to 11.21mg/cigarette, and the CO is reduced from 12.36mg/cigarette to 11.09mg/cigarette.

Example 5:

Step A: Soak the tobacco stems in water for extraction, and the extracted solids are prepared into a tobacco stem slurry with a beating degree of 40°SR through a silk rolling machine and a refiner; wherein the solid-liquid ratio of tobacco stem extraction is 1:5;

Step B: prepare a calcium carbonate solution with a concentration of 2.0%, and set aside;

Step C: Take 10% tobacco stem slurry relative to the calcium carbonate mass and add it to the calcium carbonate solution in step B, and stir for 60 minutes at a temperature of 60° C. and a stirring frequency of 200 rpm to obtain a composite of calcium carbonate and tobacco stem slurry;

Step D: Add 1% carboxymethyl cellulose relative to the mass of calcium carbonate to the calcium carbonate and tobacco stem slurry compound in step C, and then stir for 30 minutes at a temperature of 60° C. and a stirring frequency of 400 rpm to obtain carboxymethyl cellulose A cellulose-coated calcium carbonate and tobacco stem size composite;

Step E: Add 3.0% aluminum sulfate relative to the mass of calcium carbonate to the carboxymethyl cellulose-coated calcium carbonate and tobacco stem slurry compound in step D, and then stir at a temperature of 35°C and a stirring frequency of 400rpm Obtain modified calcium carbonate and tobacco stem slurry compound in 40min;

Step F: Take the compound of modified calcium carbonate and tobacco stem slurry in step E according to the calcium carbonate mass accounting for 20% of the absolute dry mass of the tobacco slurry, and stir evenly with the SR tobacco slurry with a beating degree of 30° to obtain a tobacco mixed slurry ;

Step G: Take 0.1% chitosan, 0.3% guar gum, and 0.8% bentonite relative to the absolute dry mass of tobacco pulp to prepare a multi-component composite retention and drainage system solution; Add the filter system solution to the tobacco mixed slurry, and stir for 40 minutes at a temperature of 30°C and a stirring frequency of 300 rpm;

In the embodiment of the present invention, the raw materials used in the tobacco slurry are chips produced in the process of threshing and redrying, tobacco stems produced in the process of threshing and redrying, chips screened in the process of silk making, and low-grade tobacco leaves. mix.

The calcium carbonate retention rate in the reconstituted tobacco leaves was tested according to the tobacco industry standard "YC/T 314-2009 Determination of Calcium Carbonate in Cigarette Paper Potentiometric Titration Method", and the calcium carbonate retention rate in the reconstituted tobacco leaves was 82.20%.

The physical and chemical indicators of the obtained reconstituted tobacco leaf products meet the requirements of the national standard. The sensory quality has been evaluated by experts. The aroma is pure, the smoke is delicate and transparent, the woodiness is small, the irritation is small, and the taste is pure and comfortable.

The obtained reconstituted tobacco leaves are added to cigarette products at a rate of 10%. Compared with the cigarette products without adding reconstituted tobacco leaves, the tar is reduced from 12.28mg/cigarette to 11.03mg/cigarette, and the CO is reduced from 12.36mg/cigarette to 10.98mg/cigarette.

Claims (10)

1. it is a kind of improve papermaking-method reconstituted tobaccos in calcium carbonate retention rate method, it is characterised in that the method include following step Suddenly：

Step A：Offal is soaked in water extraction, the solid content after extraction by thread rolling machine, fiberizer be prepared into beating degree 15~ 35 ° of offal slurries of SR；

Step B：Compound concentration is 2.0~5.0% calcium carbonate soln, standby；

Step C：Take and be added in the calcium carbonate soln of step B relative to the offal slurry of calcium carbonate quality 20~80% and in stirring 10~60min of stirring obtains calcium carbonate and offal slurry composition under mixing 200~500rpm of frequency；

Step D：To the carboxylic first added in the calcium carbonate and offal slurry composition of step C relative to calcium carbonate quality 1~15% Base cellulose, then stirs 10~60min under conditions of 10~60 DEG C of temperature, 200~500rpm of stirring frequency and obtains carboxylic first The calcium carbonate and offal slurry composition of base cellulose cladding；

Step E：Added relative to calcium carbonate in the calcium carbonate and offal slurry composition that are coated to the carboxymethylcellulose calcium of step D The aluminum sulfate of quality 0~5.0%, the addition of described aluminum sulfate is not 0, then in 10~60 DEG C of temperature, stirring frequency 200 10~60min is stirred under conditions of~500rpm and obtains modified calcium carbonate and offal slurry composition；

Step F：The modified calcium carbonate and offal that measure step E of tobacco slurry absolute dry mass 5~50% are accounted for by calcium carbonate quality Slurry composition stirs with tobacco slurry, obtains tobacco mixed slurry；

Step G：Take shitosan, 0~0.5% guar gum, 0~1.5% relative to tobacco slurry absolute dry mass 0~0.7% Bentonite be configured to multiple elements design retention aid and filtering aid system solution, shitosan, guar gum, bentonitic consumption are not all zero；Will Described multiple elements design retention aid and filtering aid system solution is added to tobacco mixed slurry, and in 10~60 DEG C of temperature, stirring frequency 200 10~60min is stirred under conditions of~500rpm；Then reconstituted tobacco is processed into through manufacturing paper with pulp, squeeze, be coated with, dry, cut.

2. a kind of method for improving calcium carbonate retention rate in papermaking-method reconstituted tobaccos according to claim 1, its feature exists In described calcium carbonate be precipitated calcium carbonate.

3. a kind of method for improving calcium carbonate retention rate in papermaking-method reconstituted tobaccos according to claim 1, its feature exists In described tobacco slurry beating degree be 10~40 ° of SR.

4. a kind of method for improving calcium carbonate retention rate in papermaking-method reconstituted tobaccos according to claim 1, its feature exists Taken in described step C and be added in the calcium carbonate soln of step B relative to the offal slurry of calcium carbonate quality 30~80% And obtain calcium carbonate and offal slurry composition in 30~60min is stirred under 200~500rpm of stirring frequency.

5. a kind of method for improving calcium carbonate retention rate in papermaking-method reconstituted tobaccos according to claim 1, its feature exists The carboxymethylcellulose calcium relative to calcium carbonate quality 5~10% is added in described step D.

6. a kind of method for improving calcium carbonate retention rate in papermaking-method reconstituted tobaccos according to claim 1, its feature exists The aluminum sulfate relative to calcium carbonate quality 0.15~1.2% is added in described step E.

7. a kind of method for improving calcium carbonate retention rate in papermaking-method reconstituted tobaccos according to claim 1, its feature exists One kind in the raw material used by described tobacco slurry includes offal, fragment, wood pulp, and offal, cigarette ash rod, discarded tobacco leaf Or it is several.

8. a kind of method for improving calcium carbonate retention rate in papermaking-method reconstituted tobaccos according to claim 3, its feature exists In described tobacco slurry beating degree be 20~30 ° of SR.

9. a kind of method for improving calcium carbonate retention rate in papermaking-method reconstituted tobaccos according to claim 1, its feature exists Short stalk, the cigarette processing process sieved in offal, the cigarette processing process produced during described offal is beating and double roasting Middle screening stalk sign in one or more.

10. a kind of method for improving calcium carbonate retention rate in papermaking-method reconstituted tobaccos according to claim 1, its feature exists The modified calcium carbonate and offal that measure step E of tobacco slurry absolute dry mass 10~35% are accounted for by calcium carbonate quality in step F Slurry composition stirs with tobacco slurry, obtains tobacco mixed slurry.