CN104223344A - Method for preparing reconstituted tobacco by using abandoned gunny bag as fibrous raw material - Google Patents
Method for preparing reconstituted tobacco by using abandoned gunny bag as fibrous raw material Download PDFInfo
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- CN104223344A CN104223344A CN201410400686.3A CN201410400686A CN104223344A CN 104223344 A CN104223344 A CN 104223344A CN 201410400686 A CN201410400686 A CN 201410400686A CN 104223344 A CN104223344 A CN 104223344A
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- offal
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Abstract
The invention discloses a method for preparing reconstituted tobacco by using an abandoned gunny bag as a fibrous raw material. The method is characterized in that papermaking tobacco sheet is prepared by using the abandoned gunny bag as the additional fibrous raw material and using flue-cured tobacco powder, tobacco stem and the like as tobacco raw materials. According to the method disclosed by the invention, the papermaking reconstituted tobacco is prepared, masses of abandoned gunny bags in a tobacco enterprise can be processed, the cost is reduced, and better physical characteristics and sensory quality of the papermaking reconstituted tobacco are maintained.
Description
Technical field:
The present invention relates to a kind of reconstituted tobacco preparation method being fibrous raw material with discarded gunnysack, belong to papermaking-method reconstituted tobaccos production technical field.
Background technology:
Gunnysack, because its Nantural non-toxic, strong but pliable in texture, technique are simple, wide material sources and widely as agricultural product packaging.In the utilization of waste and old gunnysack, Jia Hanfei
[1]deng people, the discarded gunnysack after chemical impregnation is ground after dynamic extruding grinding through pair roller, produce case paper vermicelli true qualities jute pulp, for the discarded gunnysack utilization of resources opens a new way; Section peace
[2]deng people with discarded gunnysack for raw material, prepared sulphite bleaching slurry, sell as commercial pastes; Li Hongbo
[3]the production process utilizing useless gunnysack slurrying for boxboard vermicelli is summarized Deng people.
[1] Jia Hanfei, Hong Ying, Yue Jinquan, etc. useless gunnysack dynamic extruding legal system slurry. [J]. paper and papermaking, 2006 (25): 48-51
[2] section peace. useless gunnysack is produced the development work of sulphite bleached pulp and is summed up. [J]. Hunan papermaking, 1995 (1): 29-30
[3] Li Hongbo. useless gunnysack slurrying is used for the production practices of boxboard vermicelli. [J]. paper making practices, 2013 (1): 38-39
Papermaking-method reconstituted tobaccos adopts paper process principle, utilizes low grade or the abandoned tobacco raw material that can not be directly used in cigarette products, manufactures paper with pulp, is coated with, dries, cuts, the technique such as perfuming and making through extraction, slurrying, substrate.In the production process of papermaking-method reconstituted tobaccos, usually add a certain proportion of non-tobacco fibrous raw material to provide certain fibre strength.At present, the outer fibre that papermaking-method reconstituted tobaccos enterprise uses provides the pulpboard of corresponding kinds of fibers primarily of papermaking enterprise, for jute pulp pulpboard, its price is at about 20,000 yuan/ton, with high costs.Gunnysack, its raw material mainly jute produced, because flaxen fiber is strong but pliable in texture, intensity is higher, is therefore highly suitable for manufacturing the higher paper of intensity.Further, because flaxen fiber lignin, pectin content are lower, gas of mixing when therefore forming as reconstituted tobacco formula is comparatively light, and organoleptic quality is better, very identical with the technical requirement of the outer fibre of reconstituted tobacco.According to statistics, the average annual recyclable amount of national gunnysack about tens0000 tons, only for China Tobacco Anhui Industrial Co., Ltd., about 280 tons, the discarded gunnysack produced due to tobacco material transport every year.Discarded gunnysack is used for the production of reconstituted tobacco, has not only processed a large amount of tobacco industrial enterprise discarded objects, and the cost of papermaking-method reconstituted tobaccos can greatly be saved.
Summary of the invention:
For overcoming the defect of prior art, the object of the present invention is to provide a kind of papermaking-method reconstituted tobaccos preparation method, the discarded gunnysack of comprehensive utilization, by replacing the plus fiber in reconstituted tobacco formula, is formed a kind of with the preparation method of the discarded gunnysack papermaking-method reconstituted tobaccos that is fibrous raw material
Technical solution problem of the present invention adopts following technical scheme:
The reconstituted tobacco preparation method being fibrous raw material with discarded gunnysack, carries out as follows:
(1) offal is separated after fibre through washing and is adopted three stage countercurrent extracting modes to extract offal and offal; The extraction conditions of every one-level that three described stage countercurrents extract is: offal: water weight ratio is 1:4, Extracting temperature 55 DEG C, and the time is 40min; Offal: water weight ratio is than being 1:6, Extracting temperature 50 DEG C, and the time is 40min; Wherein, offal is 5:5 with the charged material weight ratio of offal, and the beating degree of offal solution fibre is 12 ± 2 ° of SR.
(2) system that step (1) lixiviate obtains is carried out shove Separation of Solid and Liquid, obtain offal slag, stem extracting solution and residue, offal extract, shove mass dryness fraction >=25% of offal slag and residue, wherein the solid content of offal extract controls at 7.5%-8.0%, and stem extracting solution is passed into disuse;
(3) offal slag step (2) obtained and residue are carried out three grades of defibrinations and are obtained tobacco slurry; Offal extract is filtered, centrifugal, be concentrated into solid content be 38-40%, allotment after obtain coating fluid; The beating degree of tobacco slurry controls at 38 ± 2 ° of SR, and tobacco slurry concentrates solid content and controls at 38%-40%.
(4) discarded gunnysack is cut, dipping; Impregnation technology condition is one of following two kinds: process conditions A: solid-to-liquid ratio 1:10, adds the NaOH accounting for discarded gunnysack the weight 5% and NaPO accounting for discarded gunnysack weight 1%
4, dipping temperature 90 DEG C, time 3h; Process conditions B: solid-to-liquid ratio 1:10, add the NaOH accounting for discarded gunnysack the weight 5% and NaSO accounting for discarded gunnysack weight 8%
3, dipping temperature 90 DEG C, time 3h; After dipping, material is through the extremely two roller paste mill grinding of helical feed, for subsequent use after the packing of dehydration disposed slurry; The beating degree of slurry controls at 17 ± 2 ° of SR.
(5) by more composite than 5:5-9:1 according to dry weight to the slurry after dehydration in step (4) and Spain sisal hemp pulpboard, carry out three grades of defibrinations after hydraulic pulping, the beating degree of three grades of defibrinations controls at 42 ± 2 ° of SR.The slurry obtained is with slurry according to the tobacco slurry arrived in the ratio of 5:95 and step (3), and slurry is obtained papermaking-method reconstituted tobaccos paper substrate after upper net forming, dehydration, squeezing, drying;
(6) by the sheet paper base described in the coating solution described in step (3) to step (5), spreading rate controls at 36%-38%, and drying obtains papermaking-method reconstituted tobaccos.
Compared with the prior art, beneficial effect of the present invention is embodied in:
First, paper process thin slice prepared by the present invention is main fibrous raw material with discarded gunnysack, and discarded gunnysack is the discarded object of cigarette industrial and agricultural production, ample resources is caused to waste, use discarded gunnysack to prepare papermaking-method reconstituted tobaccos, effectively can utilize discarded object, and raw material sources are extensive; Secondly, comparatively speaking, its fiber quality is similar, but cost is well below outsourcing jute pulp for the slurry that discarded gunnysack is obtained and outsourcing ramie pulp fiber; In addition, controlled by the whole process of the paper pulp to discarded gunnysack, effectively can control the quality fluctuation of ramie pulp fiber, promote its controllability; Finally, by discarded gunnysack be the papermaking-method reconstituted tobaccos made of fibrous raw material compared with the outsourcing fiber papermaking method reconstituted tobacco prepared under same process condition, there is physical characteristic and the better advantage of aesthetic quality.
In sum, the present invention with discarded gunnysack for fibrous raw material, by after removal of impurities, dipping, defibrination with papermaking crudefiber crop slurry compatibility, the plus fiber formula of common composition papermaking-method reconstituted tobaccos, through follow-up with tobacco slurry in proportion with slurry, manufacture paper with pulp, squeeze, dry, be coated with, prepare with discarded gunnysack after drying the reconstituted tobacco being fibrous raw material, its more conventional reconstituted tobacco product on aesthetic quality and physical characteristic has certain advantage.Therefore, the method has good economic benefit and social benefit.
Below by way of detailed description of the invention, the invention will be further described.
Detailed description of the invention:
Embodiment 1: with discarded gunnysack for the method for cigarette paper process thin slice prepared by fibrous raw material, step is as follows:
(1) offal and offal weight ratio are 5:5, offal is fine through washing, solution, separate fine beating degree to control after 12 ± 2 ° of SR. offal solution fibres, adopt three stage countercurrent extracting modes to extract offal and offal, the extraction conditions of every one-level that three described stage countercurrents extract is: offal: water weight ratio is 1:4, Extracting temperature 55 DEG C, the time is 40min; Offal: water weight ratio is than being 1:6, Extracting temperature 50 DEG C, and the time is 40min;
(2) system that step (1) lixiviate obtains is carried out shove Separation of Solid and Liquid, control shove mass dryness fraction >=25% of offal and residue, obtain offal slag, stem extracting solution and residue, offal extract, wherein the solid content of offal extract controls at 7.5%-8.0%, and wherein stem extracting solution is passed into disuse;
(3) offal slag step (2) obtained and residue are carried out three grades of defibrinations and are obtained tobacco slurry, and the beating degree of tobacco slurry controls at 38 ± 2 ° of SR; Offal extract is filtered, centrifugal, be concentrated into solid content be 38%-40%, allotment after obtain coating fluid.
(4) discarded gunnysack is carried out removal of impurities, cuts, adds water retting.Impregnation technology condition is: solid-to-liquid ratio 1:10, adds the NaOH accounting for discarded gunnysack weight 5%, and accounts for the NaPO of discarded gunnysack weight 1%
4, dipping temperature 90 DEG C, time 3h; After dipping, material is through helical feed to two roller paste mill grinding, and beating degree controls 17 ± 2
°sR, slurry is packed for subsequent use after dehydration.
(5) by the slurry that obtains in step (4) and Spain sisal hemp pulpboard according to the dry weight of 5:5 than composite, three grades of defibrinations are carried out after hydraulic pulping, beating degree controls at 42 ± 2 ° of SR, obtained slurry according to the dry weight of 5:95 than with slurry with the tobacco slurry arrived in step (3), slurry is obtained papermaking-method reconstituted tobaccos paper substrate after upper net forming, dehydration, squeezing, drying.
(6) by the sheet paper base described in the coating solution described in step (3) to step (5), control spreading rate at 36%-38%, obtain papermaking-method reconstituted tobaccos after drying, gained sample is labeled as S1.
Embodiment 2: its step is identical with embodiment 1, difference is that in step (4), impregnation technology condition is: solid-to-liquid ratio 1:10, NaOH consumption 5%, NaSO
3consumption 8%, temperature 90 DEG C, time 3h, NaOH, NaSO
3described consumption is identical with embodiment 1 account form, and gained sample is labeled as S2.
Embodiment 3: its step is identical with embodiment 1, difference is that the dry weight proportioning of jute pulp and Spain's sisal hemp pulpboard in step (5) is 7:3, and gained sample is labeled as S3.
Embodiment 4: its step is identical with embodiment 1, difference is that the dry weight proportioning of jute pulp and Spain's sisal hemp pulpboard in step (5) is 9:1, and gained sample is labeled as S4.
The common reconstituted tobacco prepared under the reconstituted tobacco prepared by discarded gunnysack obtained by above-described embodiment and the same terms carries out performance comparison, and test its mechanical property, filling capacity and structural behaviour respectively, result is as shown in table 1:
Gunnysack discarded by table 1. is fibrous raw material reconstituted tobacco physical performance data
Can obtain from table 1, the reconstituted tobacco prepared by discarded gunnysack under equal conditions a little less than common reconstituted tobacco, and to increase along with the consumption of discarded jute pulp in tensile strength, presents certain reduction trend; The reconstituted tobacco that Filling power is prepared by discarded gunnysack is apparently higher than common reconstituted tobacco; Equally, in bulk, the reconstituted tobacco prepared by discarded gunnysack also has obvious advantage.
Two kinds of thin slices are made cigarette, the evaluation panels Sensory evaluation of composition of personnel of smokeing panel test through industry specialty, concrete evaluation result is as shown in table 2:
Table 2. two kinds of reconstituted tobacco smoking results
Can obtain from table 2, obviously promote with the perfume quantity of the reconstituted tobacco of discarded gunnysack prepared by majority fibers raw material, flue gas concentration, Za Qi xylon gas obviously reduces, and excitant is in a slight decrease, and pleasant impression makes moderate progress, and organoleptic quality significantly improves.
Consider physical property and aesthetic quality's data, S3 is more suitable processing method.
Claims (7)
1., with the reconstituted tobacco preparation method that discarded gunnysack is fibrous raw material, it is characterized in that carrying out as follows:
(1) offal is separated after fibre through washing and is adopted three stage countercurrent extracting modes to extract offal and offal; The extraction conditions of every one-level that three described stage countercurrents extract is: offal: water weight ratio is 1:4, Extracting temperature 55 DEG C, and the time is 40min; Offal: water weight ratio is than being 1:6, Extracting temperature 50 DEG C, and the time is 40min;
(2) system that step (1) lixiviate obtains is carried out shove Separation of Solid and Liquid, obtain offal slag, stem extracting solution and residue, offal extract, stem extracting solution is passed into disuse;
(3) offal slag step (2) obtained and residue are carried out three grades of defibrinations and are obtained tobacco slurry; Offal extract is filtered, centrifugal, be concentrated into solid content be 38-40%, allotment after obtain coating fluid;
(4) discarded gunnysack is cut, dipping; Impregnation technology condition is one of following two kinds: process conditions A: solid-to-liquid ratio 1:10, adds the NaOH accounting for discarded gunnysack the weight 5% and NaPO accounting for discarded gunnysack weight 1%
4, dipping temperature 90 DEG C, time 3h; Process conditions B: solid-to-liquid ratio 1:10, add the NaOH accounting for discarded gunnysack the weight 5% and NaSO accounting for discarded gunnysack weight 8%
3, dipping temperature 90 DEG C, time 3h; After dipping, material is through the extremely two roller paste mill grinding of helical feed, for subsequent use after the packing of dehydration disposed slurry;
(5) by the slurry after dehydration in step (4) and Spain's sisal hemp pulpboard composite according to 5:5-9:1, three grades of defibrinations are carried out after hydraulic pulping, the slurry obtained is with slurry according to the tobacco slurry arrived in the ratio of 5:95 and step (3), and slurry is obtained papermaking-method reconstituted tobaccos paper substrate after upper net forming, dehydration, squeezing, drying;
(6) by the sheet paper base described in the coating solution described in step (3) to step (5), drying obtains papermaking-method reconstituted tobaccos.
2. the reconstituted tobacco preparation method that is fibrous raw material with discarded gunnysack according to claim 1, it is characterized in that, in step (1), the charged material weight of offal and offal is than being 5:5, and the beating degree of offal solution fibre is 12 ± 2 ° of SR.
3. the reconstituted tobacco preparation method that is fibrous raw material with discarded gunnysack according to claim 1, it is characterized in that, shove mass dryness fraction >=25% of offal slag and residue in step (2), the concentration of offal extract controls at 7.5%-8.0%.
4. the reconstituted tobacco preparation method that is fibrous raw material with discarded gunnysack according to claim 1, it is characterized in that, in step (3), the beating degree of tobacco slurry controls at 38 ± 2 ° of SR, and tobacco slurry concentrates solid content and controls at 38%-40%.
5. the reconstituted tobacco preparation method that is fibrous raw material with discarded gunnysack according to claim 1, it is characterized in that, in step (4), the beating degree of slurry controls at 17 ± 2 ° of SR.
6. the reconstituted tobacco preparation method that is fibrous raw material with discarded gunnysack according to claim 1, it is characterized in that, in step (5), the dry weight of jute pulp and tobacco slurry is than being 5:5-9:1, and the beating degree of three grades of defibrinations controls at 42 ± 2 ° of SR.
7. the reconstituted tobacco preparation method that is fibrous raw material with discarded gunnysack according to claim 1, it is characterized in that, the spreading rate in step (6) controls at 36%-38%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108378409A (en) * | 2018-03-29 | 2018-08-10 | 河南中烟工业有限责任公司 | Improve the method for reconstituted tobacco quality using bacteria cellulose |
| CN109567254A (en) * | 2018-12-20 | 2019-04-05 | 陕西科技大学 | A kind of preparation method of reconstituted tobacoo and preparation method and its substrate, coating fluid |
| CN111557468A (en) * | 2020-05-12 | 2020-08-21 | 云南中烟再造烟叶有限责任公司 | Method for increasing bulk of paper-making reconstituted tobacco substrate |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4182349A (en) * | 1977-11-04 | 1980-01-08 | Kimberly-Clark Corporation | Method of making reconstituted tobacco |
| CN1290785A (en) * | 2000-11-21 | 2001-04-11 | 沈阳市天然纤维研究所 | Method for producing anti-rust raw paper by using waste ramie |
| CN1739411A (en) * | 2005-09-28 | 2006-03-01 | 长沙卷烟厂 | Tobacco flake producing process similar to papermaking |
| CN101565863A (en) * | 2009-05-15 | 2009-10-28 | 云南瑞升烟草技术（集团）有限公司 | Preparation method of hemp dissolving pulp |
| CN103141928A (en) * | 2012-12-31 | 2013-06-12 | 杭州利群环保纸业有限公司 | Preparation method for paper-making process tobacco sheet and finished product of paper-making process tobacco sheet |
| CN103174052A (en) * | 2013-02-07 | 2013-06-26 | 赵鸿 | Tobacco sheet preparing method and tobacco sheet |
| CN103222675A (en) * | 2012-04-12 | 2013-07-31 | 湖北中烟工业有限责任公司 | Preparation method of reconstituted tobacco by light-weight papermaking method |
-
2014
- 2014-08-13 CN CN201410400686.3A patent/CN104223344B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4182349A (en) * | 1977-11-04 | 1980-01-08 | Kimberly-Clark Corporation | Method of making reconstituted tobacco |
| CN1290785A (en) * | 2000-11-21 | 2001-04-11 | 沈阳市天然纤维研究所 | Method for producing anti-rust raw paper by using waste ramie |
| CN1739411A (en) * | 2005-09-28 | 2006-03-01 | 长沙卷烟厂 | Tobacco flake producing process similar to papermaking |
| CN101565863A (en) * | 2009-05-15 | 2009-10-28 | 云南瑞升烟草技术（集团）有限公司 | Preparation method of hemp dissolving pulp |
| CN103222675A (en) * | 2012-04-12 | 2013-07-31 | 湖北中烟工业有限责任公司 | Preparation method of reconstituted tobacco by light-weight papermaking method |
| CN103141928A (en) * | 2012-12-31 | 2013-06-12 | 杭州利群环保纸业有限公司 | Preparation method for paper-making process tobacco sheet and finished product of paper-making process tobacco sheet |
| CN103174052A (en) * | 2013-02-07 | 2013-06-26 | 赵鸿 | Tobacco sheet preparing method and tobacco sheet |
Non-Patent Citations (2)
| Title |
|---|
| 李洪波: "废麻袋制浆用于箱板纸挂面的生产实践", 《黑龙江造纸》 * |
| 贾寒飞等: "废麻袋动态挤压法制浆", 《纸和造纸》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108378409A (en) * | 2018-03-29 | 2018-08-10 | 河南中烟工业有限责任公司 | Improve the method for reconstituted tobacco quality using bacteria cellulose |
| CN108378409B (en) * | 2018-03-29 | 2021-12-17 | 河南中烟工业有限责任公司 | Method for improving quality of reconstituted tobacco by using bacterial cellulose |
| CN109567254A (en) * | 2018-12-20 | 2019-04-05 | 陕西科技大学 | A kind of preparation method of reconstituted tobacoo and preparation method and its substrate, coating fluid |
| CN109567254B (en) * | 2018-12-20 | 2021-07-30 | 陕西科技大学 | Tobacco sheet, preparation method thereof, substrate of tobacco sheet and preparation method of coating liquid |
| CN111557468A (en) * | 2020-05-12 | 2020-08-21 | 云南中烟再造烟叶有限责任公司 | Method for increasing bulk of paper-making reconstituted tobacco substrate |
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