CN104705775A - Preparation and application for paper-making process reconstituted tobacco sizing agent coated with calcium carbonate - Google Patents
Preparation and application for paper-making process reconstituted tobacco sizing agent coated with calcium carbonate Download PDFInfo
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- CN104705775A CN104705775A CN201510049021.7A CN201510049021A CN104705775A CN 104705775 A CN104705775 A CN 104705775A CN 201510049021 A CN201510049021 A CN 201510049021A CN 104705775 A CN104705775 A CN 104705775A
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- slurry
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- calcium carbonate
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- reconstituted tobaccos
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products
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Abstract
The invention relates to a method and application for a paper-making process reconstituted tobacco sizing agent coated with calcium carbonate. The method comprises the steps that wood pulp fibers, tobacco stem fibers and fragment fibers are used for preparing a sizing agent, then, the sizing agent is soaked into a soluble carbonate solution for 0.5 h to 3 h, and then water is removed through centrifuge dripping; the sizing agent fiber with no water is added into a soluble calcium salt with the calcium ion concentration ranging from 1 mol/L to 3 mol/L, the concentration of the sizing agent is controlled to range from 3% to 10%, and a reaction is performed at room temperature for 3 min to 5 min; in the sizing agent solution, citric acid with the mass concentration ranging from 0.01% to 0.03% is added as a crystal form control agent, and CO2 is led into the solution at the temperature ranging from 20 DEG C to 35 DEG C for a reaction for 0.5 h to 1 h until the pH value of the solution ranges from 7.0 to 7.5, so that a certain amount of nano calcium carbonate coats the surface of paper-making process reconstituted tobacco, and centrifuge dripping is carried out to obtain the paper-making process reconstituted tobacco sizing agent coated with calcium carbonate. The method has the advantages of being easy to implement, high in efficiency and high in application value.
Description
Technical field
The invention belongs to papermaking-method reconstituted tobaccos technical field, be specifically related to a kind of by the technology of papermaking-method reconstituted tobaccos pulp surface coated caco3 to improve the method for its sheet base calcium carbonate retention rate.
Background technology
The development of low-coke tar cigarette and the increase of mixture proportion have all promoted the increase year by year of reconstituted tobacco consumption, it is also proposed higher requirement to its amount and matter.Filler can improve filling capacity and the institutional framework of product, and promoting quality and the security of reconstituted tobacco product, is the important means of the reducing tar and reducing harm function in cigarette realizing reconstituted tobacco product.
At present, calcium carbonate is the topmost fillers of most of papermaking-method reconstituted tobaccos manufacturing enterprises, calcium carbonate addition manner is added to master mainly with in slurry, the binding ability of this mode calcium carbonate and slurry is more weak, the retention of calcium carbonate is low, major part enters plain boiled water, has both caused the waste of calcium carbonate, has also increased sewage treatment load.So the methods improving the retention of calcium carbonate have become one of emphasis of reconstituted tobacco enterprises pay attention and research.At present, the calcium carbonate retention rate of adding auxiliary agent, changing papermaking-method reconstituted tobaccos such as raising such as interpolation site and addition manner etc. is mainly adopted.But reported with the research that the method improving calcium carbonate retention rate is not relevant by the method at papermaking-method reconstituted tobaccos pulp surface coated caco3.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, providing a kind of method improving papermaking-method reconstituted tobaccos sheet base calcium carbonate retention rate, the method has simple to operate, with low cost and that using value is high advantage.
The technical solution used in the present invention is as follows:
Improve a preparation method for the papermaking-method reconstituted tobaccos slurry of calcium carbonate retention rate, comprise the steps:
Step (1), the preparation of slurry: wood pulp cellulose, tobacco stalk fibre and chopped fiber are prepared slurry by absolute dry mass than 14-16:49-51:34-36, beating degree is 29 ° of SR-31 ° of SR;
Step (2), the immersion of soluble carbonate salt: the slurry that step (1) obtains is immersed in the soluble carbonate salt aqueous solution, the carbon acid ion concentration of soluble carbonate salt is 1-3 mol/L, and the mass concentration of the over dry thing of slurry controls at 1-10%, soak time 0.5-3h;
Step (3), the recovery of slurry: the moisture in the slurry that removal step (2) obtains, obtains pulp fiber;
Step (4), slurry internal pair production calcium carbonate: the pulp fiber that step (3) obtains being joined calcium ion concentration is in the solubility calcium saline solution of 0.5-2 mol/L, slurry concentration controls at 3-10%, 3-5 min is reacted under room temperature, make the soluble carbonate salt and the solubility calcium reactant salt Formed acid calcium that go deep into fibrous inside, obtain pulp solution;
Step (5), pulp surface coated caco3: in the pulp solution that step (4) obtains, add mass concentration be the citric acid of 0.01-0.03% as chemical additives, then at 20-35 DEG C, in pulp solution, pass into CO
2gas, reaction 0.5-1 h, be 7.0-7.5 to solution ph, centrifuge dripping, namely obtains the papermaking-method reconstituted tobaccos slurry of Surface coating carbonic acid calcium.
Further, the preparation of the slurry preferably described in step (1) is that wood pulp cellulose, tobacco stalk fibre and chopped fiber are prepared slurry by absolute dry mass than 15:50:35, and beating degree is 30 ° of SR.
Further, the soluble carbonate salt preferably described in step (2) is one or more in ammonium carbonate, potash and sodium carbonate.
Further, the moisture in the slurry that the removal step (2) preferably described in step (3) obtains adopts centrigugal swing dryer to dry.
Further, the soluble calcium salt preferably described in step (4) is one or more in calcium formate, calcium acetate, calcium lactate and calcium chloride.
Further, preferably in step (5) by CO
2it is carry out in Drexel bottle that gas passes in the pulp solution that step (4) obtains.
The application of slurry in papermaking-method reconstituted tobaccos that the preparation method of the papermaking-method reconstituted tobaccos slurry of above-mentioned raising calcium carbonate retention rate obtains.
Its application process is: the concentration of the papermaking-method reconstituted tobaccos slurry that set-up procedure (5) obtains is 0.8-1.1% to the mass concentration of over dry thing, stirs, reconstituted tobacco sheet base of then manufacturing paper with pulp, and it is for subsequent use to dry sheet base.
Further, preferably its application process is: the concentration of the papermaking-method reconstituted tobaccos slurry that set-up procedure (5) obtains is 1% to the mass concentration of over dry thing, stirs, reconstituted tobacco sheet base of then manufacturing paper with pulp, and it is for subsequent use to dry sheet base.
Employing of the present invention be inner at papermaking-method reconstituted tobaccos slurry and the method for Surface coating carbonic acid calcium raising papermaking-method reconstituted tobaccos sheet base calcium carbonate retention rate, its principle is that nucleus produces calcium carbonate crystal with fiber in the inside of slurry, at pulp surface coated nano calcium carbonate, enhance the binding ability between calcium carbonate and pulp fiber, enhance the ability of slurry in conjunction with calcium carbonate, not easily run off in the process of manufacturing paper with pulp, coated slurry is used as the slurry of papermaking-method reconstituted tobaccos, improve the retention of calcium carbonate, improve the performance of papermaking-method reconstituted tobaccos, to realize the function of papermaking-method reconstituted tobaccos reducing tar and reducing harm.
compared with prior art, its beneficial effect is in the present invention:the inventive method effectively can improve the calcium carbonate retention rate of papermaking-method reconstituted tobaccos sheet base, while reducing costs, the ash content of reconstituted tobacco product can also be improved, improve its physicochemical property, improving product quality, has simple to operate, with low cost and that using value is high advantage.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example only for illustration of the present invention, and should not be considered as limiting scope of the present invention.Unreceipted concrete technology or condition person in embodiment, according to the technology described by the document in this area or condition or carry out according to product description.Agents useful for same or the unreceipted production firm person of instrument, being can by buying the conventional products obtained.
Embodiment 1
Take wood pulp cellulose, tobacco stalk fibre and chopped fiber slurry 20 g by absolute dry mass than for 16:51:35, defibrination to beating degree is 31 ° of SR, is immersed in by the slurry of milled in the wet chemical of 400mL 3mol/L, soaks 1h; With centrigugal swing dryer centrifuge dripping slurry, dewatered slurry is transferred in the Drexel bottle of 1L, adds the calcium chloride water of 500mL 0.5mol/L, keep 3min; Add mass concentration be the citric acid of 0.01% as chemical additives, stir, pass into CO
2, CO
2flow 5L/min, under 25 DEG C of conditions, reacts 30 min, and measuring pH is 7.2, and centrifuge dripping, namely obtains the reconstructed tobacco leaf slurry of coated caco3.
The mass concentration to 0.9% of allotment slurry, stirs, and reconstituted tobacco sheet base of then manufacturing paper with pulp dries sheet base, for subsequent use.
The calcium carbonate retention rate preparing sheet base is after measured 52.6%, and sheet base ash content is 27.2%; And the retention contrasting (directly making filler with precipitated calcium carbonate) calcium carbonate is only 21.9%, the ash content of sheet base is 15.6%.
Embodiment 2
Take wood pulp cellulose, tobacco stalk fibre and chopped fiber slurry 30 g by absolute dry mass than for 15:50:35, defibrination to beating degree is 29 ° of SR, is immersed in by the slurry of milled in the aqueous sodium carbonate of 500mL 1mol/L, soaks 2h; With centrigugal swing dryer centrifuge dripping slurry, dewatered slurry is transferred in the Drexel bottle of 1L, adds the calcium lactate aqueous solution of 600mL 1mol/L, keep 4min; Add mass concentration be the citric acid of 0.02% as chemical additives, stir, pass into CO
2, CO
2flow 10L/min, under 30 DEG C of conditions, reaction 1h, measuring pH is 7.1, and centrifuge dripping, namely obtains the reconstructed tobacco leaf slurry of coated caco3.
The mass concentration to 1% of allotment slurry, stirs, and reconstituted tobacco sheet base of then manufacturing paper with pulp dries sheet base, for subsequent use.
The calcium carbonate retention rate preparing sheet base is after measured 61.3%, and sheet base ash content is 31.5%; And the retention contrasting (directly making filler with precipitated calcium carbonate) calcium carbonate is only 20.7%, the ash content of sheet base is 15.1%.
Embodiment 3
Take wood pulp cellulose, tobacco stalk fibre and chopped fiber slurry 25 g by absolute dry mass than for 14:51:34, the slurry of milled, to beating degree 31 ° of SR, is immersed in the ammonium carbonate solution of 500mL 1.5mol/L by defibrination, soaks 3h; With centrigugal swing dryer centrifuge dripping slurry, dewatered slurry is transferred in the Drexel bottle of 1L, adds the calcium acetate aqueous solution of 500mL 2mol/L, keep 5min; Add mass concentration be the citric acid of 0.03% as chemical additives, stir, pass into CO
2, CO
2flow 6L/min, under 20 DEG C of conditions, reacts 45 min, and measuring pH is 7.0, and centrifuge dripping, namely obtains the reconstructed tobacco leaf slurry of coated caco3.
The mass concentration to 0.8% of allotment slurry, stirs, and reconstituted tobacco sheet base of then manufacturing paper with pulp dries sheet base, for subsequent use.
The calcium carbonate retention rate preparing sheet base is after measured 56.8%, and sheet base ash content is 29.3%; And the retention contrasting (directly making filler with precipitated calcium carbonate) calcium carbonate is only 21.6%, the ash content of sheet base is 15.4%.
Embodiment 4
Wood pulp cellulose, tobacco stalk fibre and chopped fiber slurry 30 g is taken than for 15:49:36 by absolute dry mass, defibrination is to beating degree 30 ° of SR, the slurry of milled is immersed in the ammonium carbonate that 1000mL carbon acid ion concentration is 1mol/L and potash mixed aqueous solution (mol ratio of ammonium carbonate and potash is 1:1), soaks 0.5h; With centrigugal swing dryer centrifuge dripping slurry, dewatered slurry is transferred in the Drexel bottle of 1L, adds calcium formate and calcium lactate (mol ratio of calcium acetate and calcium lactate the is 1:2) aqueous solution that 500mL calcium ion concentration is 1mol/L, keep 5min; Add mass concentration be the citric acid of 0.01% as chemical additives, stir, pass into CO
2, CO
2flow 8L/min, under 35 DEG C of conditions, reaction 1h, measuring pH is 7.2, and centrifuge dripping, namely obtains the reconstructed tobacco leaf slurry of coated caco3.
The mass concentration to 1.1% of allotment slurry, stirs, and reconstituted tobacco sheet base of then manufacturing paper with pulp dries sheet base, for subsequent use.
The calcium carbonate retention rate preparing sheet base is after measured 71.8%, and sheet base ash content is 32.5%; And the retention contrasting (directly making filler with precipitated calcium carbonate) calcium carbonate is only 23.4%, the ash content of sheet base is 16.4%.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof
.
Claims (9)
1. improve a preparation method for the papermaking-method reconstituted tobaccos slurry of calcium carbonate retention rate, it is characterized in that comprising the steps:
Step (1), the preparation of slurry: wood pulp cellulose, tobacco stalk fibre and chopped fiber are prepared slurry by absolute dry mass than 14-16:49-51:34-36, beating degree is 29 ° of SR-31 ° of SR;
Step (2), the immersion of soluble carbonate salt: the slurry that step (1) obtains is immersed in the soluble carbonate salt aqueous solution, the carbon acid ion concentration of soluble carbonate salt is 1-3 mol/L, and the mass concentration of the over dry thing of slurry controls at 1-10%, soak time 0.5-3h;
Step (3), the recovery of slurry: the moisture in the slurry that removal step (2) obtains, obtains pulp fiber;
Step (4), slurry internal pair production calcium carbonate: the pulp fiber that step (3) obtains being joined calcium ion concentration is in the solubility calcium saline solution of 0.5-2 mol/L, the mass concentration of slurry over dry thing controls at 3-10%, reacts 3-5 min, obtain pulp solution under room temperature;
Step (5), pulp surface coated caco3: in the pulp solution that step (4) obtains, add mass concentration be the citric acid of 0.01-0.03% as chemical additives, then at 20-35 DEG C, in pulp solution, pass into CO
2gas, reaction 0.5-1 h, be 7.0-7.5 to solution ph, centrifuge dripping, namely obtains the papermaking-method reconstituted tobaccos slurry of Surface coating carbonic acid calcium.
2. the preparation method of the papermaking-method reconstituted tobaccos slurry of raising calcium carbonate retention rate according to claim 1, it is characterized in that the preparation of the slurry described in step (1) is that wood pulp cellulose, tobacco stalk fibre and chopped fiber are prepared slurry by absolute dry mass than 15:50:35, beating degree is 30 ° of SR.
3. the preparation method of the papermaking-method reconstituted tobaccos slurry of raising calcium carbonate retention rate according to claim 1, the soluble carbonate salt that it is characterized in that described in step (2) is one or more in ammonium carbonate, potash and sodium carbonate.
4. the preparation method of the papermaking-method reconstituted tobaccos slurry of raising calcium carbonate retention rate according to claim 1, is characterized in that the moisture in the slurry that the removal step (2) described in step (3) obtains adopts centrigugal swing dryer to dry.
5. the preparation method of the papermaking-method reconstituted tobaccos slurry of raising calcium carbonate retention rate according to claim 1, the soluble calcium salt that it is characterized in that described in step (4) is one or more in calcium formate, calcium acetate, calcium lactate and calcium chloride.
6. the preparation method of the papermaking-method reconstituted tobaccos slurry of raising calcium carbonate retention rate according to claim 1, is characterized in that CO in step (5)
2it is carry out in Drexel bottle that gas passes in the pulp solution that step (4) obtains.
7. the application of slurry in papermaking-method reconstituted tobaccos that the preparation method that claim 1-6 any one improves the papermaking-method reconstituted tobaccos slurry of calcium carbonate retention rate obtains.
8. the application of slurry in papermaking-method reconstituted tobaccos that obtain of the preparation method of the papermaking-method reconstituted tobaccos slurry of raising calcium carbonate retention rate according to claim 7, it is characterized in that, the concentration of the papermaking-method reconstituted tobaccos slurry that set-up procedure (5) obtains is 0.8-1.1% to the mass concentration of over dry thing, stir, then manufacture paper with pulp reconstituted tobacco sheet base, it is for subsequent use to dry sheet base.
9. the application of slurry in papermaking-method reconstituted tobaccos that obtain of the preparation method of the papermaking-method reconstituted tobaccos slurry of raising calcium carbonate retention rate according to claim 8, it is characterized in that, the concentration of the papermaking-method reconstituted tobaccos slurry that set-up procedure (5) obtains is 1% to the mass concentration of over dry thing, stir, then manufacture paper with pulp reconstituted tobacco sheet base, it is for subsequent use to dry sheet base.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104957753A (en) * | 2015-07-09 | 2015-10-07 | 川渝中烟工业有限责任公司 | Method for increasing retention rate of calcium carbonate in paper-making reconstituted tobacco |
| CN104957755A (en) * | 2015-07-09 | 2015-10-07 | 川渝中烟工业有限责任公司 | Method for increasing retention rate of calcium carbonate in paper-making reconstituted tobacco |
| CN104957751A (en) * | 2015-07-09 | 2015-10-07 | 川渝中烟工业有限责任公司 | Method for increasing retention rate of calcium carbonate in paper-making reconstituted tobacco |
| CN105077556A (en) * | 2015-07-09 | 2015-11-25 | 川渝中烟工业有限责任公司 | Method for improving calcium carbonate retention rate in paper-making process reconstituted tobacco |
| CN105077555A (en) * | 2015-07-09 | 2015-11-25 | 川渝中烟工业有限责任公司 | Processing method for reconstituted tobacco through paper-making method |
| CN105077554A (en) * | 2015-07-09 | 2015-11-25 | 川渝中烟工业有限责任公司 | Method for increasing retention rates of pulp of papermaking reconstituted tobacco |
| CN105146716A (en) * | 2015-07-09 | 2015-12-16 | 川渝中烟工业有限责任公司 | Method of increasing calcium carbonate retention in paper-making reconstituted tobacco |
| CN105146719A (en) * | 2015-07-09 | 2015-12-16 | 川渝中烟工业有限责任公司 | Method of increasing calcium carbonate retention in paper-making reconstituted tobacco |
| CN105146717A (en) * | 2015-07-09 | 2015-12-16 | 川渝中烟工业有限责任公司 | Method of increasing calcium carbonate retention in paper-making reconstituted tobacco |
| CN105146718A (en) * | 2015-07-09 | 2015-12-16 | 川渝中烟工业有限责任公司 | Method of increasing calcium carbonate retention in paper-making reconstituted tobacco |
| CN105852188A (en) * | 2016-03-30 | 2016-08-17 | 宁波艾克威特智能科技有限公司 | Coating composition for improving bulkiness of tobacco sheets |
| CN105883879A (en) * | 2016-04-07 | 2016-08-24 | 安徽江东科技粉业有限公司 | Preparation method of nano-coated composite calcium carbonate |
| CN107385990A (en) * | 2017-06-28 | 2017-11-24 | 常州市奥普泰克光电科技有限公司 | A kind of mask paper and preparation method thereof |
| CN109619649A (en) * | 2018-11-22 | 2019-04-16 | 湖北中烟工业有限责任公司 | A kind of preparation method of high Filling power new tobacco products dedicated foil |
| CN110814287A (en) * | 2019-10-22 | 2020-02-21 | 东风精密铸造安徽有限公司 | Shell manufacturing method for composite precision casting silica sol shell |
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| CN104957751A (en) * | 2015-07-09 | 2015-10-07 | 川渝中烟工业有限责任公司 | Method for increasing retention rate of calcium carbonate in paper-making reconstituted tobacco |
| CN105077555B (en) * | 2015-07-09 | 2016-09-14 | 川渝中烟工业有限责任公司 | A kind of processing method of papermaking-method reconstituted tobaccos |
| CN105077554B (en) * | 2015-07-09 | 2016-09-14 | 川渝中烟工业有限责任公司 | A kind of method improving papermaking-method reconstituted tobaccos slurry retention |
| CN105077555A (en) * | 2015-07-09 | 2015-11-25 | 川渝中烟工业有限责任公司 | Processing method for reconstituted tobacco through paper-making method |
| CN105077554A (en) * | 2015-07-09 | 2015-11-25 | 川渝中烟工业有限责任公司 | Method for increasing retention rates of pulp of papermaking reconstituted tobacco |
| CN105146716A (en) * | 2015-07-09 | 2015-12-16 | 川渝中烟工业有限责任公司 | Method of increasing calcium carbonate retention in paper-making reconstituted tobacco |
| CN105146719A (en) * | 2015-07-09 | 2015-12-16 | 川渝中烟工业有限责任公司 | Method of increasing calcium carbonate retention in paper-making reconstituted tobacco |
| CN105146717A (en) * | 2015-07-09 | 2015-12-16 | 川渝中烟工业有限责任公司 | Method of increasing calcium carbonate retention in paper-making reconstituted tobacco |
| CN105146718A (en) * | 2015-07-09 | 2015-12-16 | 川渝中烟工业有限责任公司 | Method of increasing calcium carbonate retention in paper-making reconstituted tobacco |
| CN104957753A (en) * | 2015-07-09 | 2015-10-07 | 川渝中烟工业有限责任公司 | Method for increasing retention rate of calcium carbonate in paper-making reconstituted tobacco |
| CN105146719B (en) * | 2015-07-09 | 2017-06-13 | 川渝中烟工业有限责任公司 | A kind of method of calcium carbonate retention rate in raising papermaking-method reconstituted tobaccos |
| CN105146718B (en) * | 2015-07-09 | 2017-06-13 | 川渝中烟工业有限责任公司 | A kind of method of calcium carbonate retention rate in raising papermaking-method reconstituted tobaccos |
| CN104957755A (en) * | 2015-07-09 | 2015-10-07 | 川渝中烟工业有限责任公司 | Method for increasing retention rate of calcium carbonate in paper-making reconstituted tobacco |
| CN105077556A (en) * | 2015-07-09 | 2015-11-25 | 川渝中烟工业有限责任公司 | Method for improving calcium carbonate retention rate in paper-making process reconstituted tobacco |
| CN104957751B (en) * | 2015-07-09 | 2016-09-14 | 川渝中烟工业有限责任公司 | A kind of improve the method for calcium carbonate retention rate in papermaking-method reconstituted tobaccos |
| CN104957755B (en) * | 2015-07-09 | 2016-11-30 | 川渝中烟工业有限责任公司 | A kind of improve the method for calcium carbonate retention rate in papermaking-method reconstituted tobaccos |
| CN105146716B (en) * | 2015-07-09 | 2016-11-30 | 川渝中烟工业有限责任公司 | A kind of improve the method for calcium carbonate retention rate in papermaking-method reconstituted tobaccos |
| CN105077556B (en) * | 2015-07-09 | 2017-03-01 | 川渝中烟工业有限责任公司 | A kind of method of calcium carbonate retention rate in raising papermaking-method reconstituted tobaccos |
| CN105852188A (en) * | 2016-03-30 | 2016-08-17 | 宁波艾克威特智能科技有限公司 | Coating composition for improving bulkiness of tobacco sheets |
| CN105883879A (en) * | 2016-04-07 | 2016-08-24 | 安徽江东科技粉业有限公司 | Preparation method of nano-coated composite calcium carbonate |
| CN107385990A (en) * | 2017-06-28 | 2017-11-24 | 常州市奥普泰克光电科技有限公司 | A kind of mask paper and preparation method thereof |
| CN107385990B (en) * | 2017-06-28 | 2019-12-03 | 江苏源清环保科技有限公司 | A kind of mask paper and preparation method thereof |
| CN109619649B (en) * | 2018-11-22 | 2021-12-03 | 湖北中烟工业有限责任公司 | Preparation method of novel high-filling-value sheet special for tobacco products |
| CN109619649A (en) * | 2018-11-22 | 2019-04-16 | 湖北中烟工业有限责任公司 | A kind of preparation method of high Filling power new tobacco products dedicated foil |
| CN110814287A (en) * | 2019-10-22 | 2020-02-21 | 东风精密铸造安徽有限公司 | Shell manufacturing method for composite precision casting silica sol shell |
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