CN102754921A - Method for reducing release of objectionable constituents in main stream smoke of cigarettes - Google Patents
Method for reducing release of objectionable constituents in main stream smoke of cigarettes Download PDFInfo
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- CN102754921A CN102754921A CN2012102393913A CN201210239391A CN102754921A CN 102754921 A CN102754921 A CN 102754921A CN 2012102393913 A CN2012102393913 A CN 2012102393913A CN 201210239391 A CN201210239391 A CN 201210239391A CN 102754921 A CN102754921 A CN 102754921A
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- polyurethane
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Abstract
The invention discloses a method for reducing release of objectionable constituents in main stream smoke of cigarettes, wherein polyurethane/inorganic nano-material hybrid soft foams are compounded with common cellulose acetate fibers to prepare two-member composite filter sticks, and the two-member composite filter sticks are coiled with cut tobacco into cigarettes. In compounding, the common cellulose acetate fiber sections and the polyurethane/inorganic nano-material hybrid soft foam sections are arranged alternatively; and the total length ratio of the cellulose acetate fiber sections to the polyurethane/inorganic nano-material hybrid soft foam sections is 1: (2-1), wherein the common cellulose acetate fiber sections are arranged at the tail ends of the filter sticks, while the polyurethane/inorganic nano-material hybrid soft foam sections are arranged at the front ends of the filter sticks to contact with the cut tobacco. The two-member composite filter sticks formed by the method provided by the invention is capable of reducing the release of the objectionable constituents in the main stream smoke, such as CO, hydrocyanic acid, benzo(a)pyrene, phenol and NNK, by more than 30%.
Description
Technical field:
The present invention relates to a kind of method that reduces cigarette mainstream flue gas harmful components burst size, belong to the lowering harm and decreasing coking technical field of tobacco industry.
Background technology:
Present stage, tobacco business was faced with the multiple pressure of the World Health Organization and [Tobacco Control framework treaty]; On the other hand, along with improving constantly of living standard and quality of life, the contradiction between smoking and the health becomes increasingly conspicuous; To the cigarette security require increasingly high; Improve the cigarette security, the burst size that lowers harmful components in the cigarette smoke is the developing direction of international cigarette technology, also is the inevitable demand of development Chinese style cigarette.Seven kinds of harmful components carbon monoxide, hydrogen cyanide, Benzpyrene, phenol, crotonaldehyde, ammonia and 4-(methyl nitrosamino group) in the cigarette-4-(3-pyridine radicals)-1-butanone (NNK) burst size can effectively characterize cigarette mainstream flue gas biohazard property, and effectively reducing by seven kinds of harmful components is key problem in technology of realizing further harm reduction work.
At present, exploitation has the research focus that the new material of harm reduction function is current tobacco science and technology.Polyurethane foamed material has been used to adsorb the harmful chemical in the environmental gas in the environmental protection field, join (two) benzene, dioxy (mixing) glutinous rehmannia and furans or the like such as condensed-nuclei aromatics, many chlorinations.Yet the conventional polyurethanes foam can not be used for adsorbing low-molecular-weight organic compound, comprises the compound that only contains an aromatic rings.In addition, the hydrophobicity of polyurethane foam makes that also its adsorption capacity to hydrophilic compounds is very faint, therefore, can produce removal effect preferably to crucial harmful substance in the cigarette smoke in order to make polyurethane foam, often needs it is carried out chemical modification.Like the patent No. is the United States Patent (USP) once open " cigarette filter of carcinogenic composition of a kind of effective reduction and toxic chemical substance " of 6273095B1; Patent extracts 16 hours with the polyurethane of intermediate density in the n-hexane that contains ether after; Be applied in the cigarette filter; Can effectively adsorb condensed-nuclei aromatics and cyanide in the cigarette mainstream flue gas, and nicotine is passed through smoothly." micropore and the empty material that is situated between " (Microporous and Mesoporous Materials, 2012 of Holland Ai Siweier (Elsevier) company; 151:79) point out in magazine " a kind of new polyurethane/aluminum oxide hybridization flexible foam " literary composition with superpower hydrophily and absorption carcinogenic compound; Ultra-fine alumina is added in the polyurethane flexible foam; Prepare polyurethane/aluminum oxide hybridization flexible foam; Be applied to substitute in the cigarette filter part filter tip; The result finds that it can significantly reduce the harmful substances such as CO, nitrosamines material, acetamide, cresols and micromolecular aldehyde compound in the main flume, has confirmed its potential possibility as cigarette harm reduction material.
Yet, at present about utilizing polyurethane/inorganic nano material hydridization flexible foam also not appear in the newspapers as the method that cigarette harm reduction material reduces cigarette mainstream flue gas harmful components burst size.Therefore; Develop the new polyurethane/nano material hydridization flexible foam that can be applicable to the tobacco business production and can significantly reduce cigarette mainstream flue gas harmful components burst size, have positive impetus for the lifting of tobacco business lowering harm and decreasing coking technical research level.
Summary of the invention:
For overcoming the defective of prior art, the object of the present invention is to provide simple, the steady quality of a kind of production technology, can effectively reduce the method for cigarette mainstream flue gas harmful components burst size.
Technical solution problem of the present invention adopts following technical scheme:
Reduce the method for cigarette mainstream flue gas harmful components burst size, adopt polyurethane/inorganic nano material hydridization flexible foam, with the compound binary compound filter candle that is prepared into of common acetate fiber, cigarette becomes cigarette to prop up.
Said polyurethane/inorganic nano material hydridization flexible foam, form by following composition and weight proportion thereof:
Said PPG is that molecular weight distribution is the PPG of 2800-6000.
Said isocyanates is methyl diphenylene diisocyanate or toluene di-isocyanate(TDI).
Said water is distilled water or deionized water.
Said tin catalyst is stannous octoate or dibutyl tin laurate.
Said inorganic nano material is a nano zine oxide; Nano magnesia; Nano cupric oxide; Nano-nickel oxide; Nano oxidized praseodymium; Nano-stannic oxide; Nano silicon; Nano titanium oxide; Nano zirconium dioxide; Nano ceric oxide; Nano-aluminium oxide; The nanometer chrome green; The nanometer manganese sesquioxide managnic oxide; The nanometer neodymium oxide; The nanometer yttria; The nanometer samarium sesquioxide; The nanometer Dysprosium trioxide; The nanometer lanthanum sesquioxide; Titania nanotube; CNT a kind of.
Said common acetate fiber section and polyurethane/inorganic nano material hydridization flexible foam section is compounded to form binary compound filter candle, and common acetate fiber section of compound tense and polyurethane/inorganic nano material hydridization flexible foam section is alternately arranged; And the total length of acetate fiber section and polyurethane/inorganic nano material hydridization flexible foam section is than being 1:2～1, and wherein common acetate fiber section is at the end of filter stick, and polyurethane/inorganic nano material hydridization flexible foam section promptly contacts pipe tobacco at the front end of filter stick.
The principle that common acetate fiber section and polyurethane/inorganic nano material hydridization flexible foam section is compounded to form binary compound filter candle reduction cigarette mainstream flue gas harmful components is following: the loose structure of polyurethane/inorganic nano material hydridization flexible foam has bigger specific area on the one hand, has stronger suction-operated for the harmful components in the main flume; On the other hand, there is a large amount of catalytic activity sites on the inorganic nano material, has the better conversion effect for the part harmful components.The 3rd, inorganic nano material can improve the hydrophobicity of polyurethane flexible foam effectively, has improved its adsorption capacity to hydrophilic compounds.
Compared with present technology, beneficial effect of the present invention is embodied in:
1, harm reduction effect is obvious.Common acetate fiber section that the present invention selected for use and polyurethane/inorganic nano material hydridization flexible foam section is compounded to form binary compound filter candle, can reach to reduce in the main flume harmful components CO, hydrogen cyanide, benzo [a] pyrene, phenol and NNK burst size more than 30%.
2, the present invention does not have negative effect to the smoking property of cigarette quality.
3, the preparation implementation is simple.In whole process of preparation, need not increase any production equipment, can not change existing production of cigarettes processing technology yet, technical implementation way is simple.
Below, the present invention is described further through the specific embodiment.
The specific embodiment:
Embodiment 1:
By mass ratio take by weighing 45% molecular weight distribution be the nano silicon of 2800 PPG, 3% deionized water, 0.1% triethylene diamine, 0.1% stannous octoate, 1.8% silicone oil and 20% in beaker, high-speed stirred is fully mixed it; Then, quick methyl diphenylene diisocyanate with 30% adds wherein under stirring, pours mould into after mixing; After foam is initiated and is solidified, it is moved into 50 ℃ of incubator slaking 2h, finally demould promptly obtains polyurethane/nano-silicon dioxide hydridization flexible foam.This foam and acetate fiber are prepared into binary compound filter candle according to the total length ratio for 1:1.Cigarette not contain polyurethane/nano-silicon dioxide hydridization flexible foam section in the filter tip is a control sample; On smoking machine, carry out the cigarette smoking test according to the standard aspiration condition, and carry out the detection of main flume CO, phenol, benzo [a] pyrene, NNK and hydrogen cyanide burst size according to standard GB/T23356-2009, YC/T255-2008, GB/T21130-2007, GB/T 23228-2008 and YC/T 403-2011.Analysis result is seen table 1.
Embodiment 2:
By mass ratio take by weighing 60% molecular weight distribution be 6000 PPG, 1% the nano titanium oxide that removes distilled water, 0.05% triethylene diamine, 0.2% dibutyl tin laurate, 5% silicone oil and 13.75% in beaker, high-speed stirred is fully mixed it; Then, quick toluene di-isocyanate(TDI) with 20% adds wherein under stirring, pours mould into after mixing; After foam is initiated and is solidified, it is moved into 50 ℃ of incubator slaking 2h, finally demould promptly obtains the polyurethane/nano titanium dioxide hybrid flexible foam.This foam and acetate fiber are prepared into binary compound filter candle according to the total length ratio for 1:2.With the cigarette that does not contain polyurethane/nano titanium dioxide hybrid flexible foam section in the filter tip is control sample; On smoking machine, carry out the cigarette smoking test according to the standard aspiration condition, and carry out the detection of main flume CO, phenol, benzo [a] pyrene, NNK and hydrogen cyanide burst size according to standard GB/T23356-2009, YC/T255-2008, GB/T21130-2007, GB/T 23228-2008 and YC/T 403-2011.Analysis result is seen table 1.
Embodiment 3:
By mass ratio take by weighing 50% molecular weight distribution be the CNT of 4000 PPG, 2.5% deionized water, 0.05% triethylene diamine, 0.05% stannous octoate, 2.45% silicone oil and 19.95% in beaker, high-speed stirred is fully mixed it; Then, quick methyl diphenylene diisocyanate with 25% adds wherein under stirring, pours mould into after mixing; After foam is initiated and is solidified, it is moved into 50 ℃ of incubator slaking 2h, finally demould promptly obtains polyurethane/carbon nano-tube hydridization flexible foam.This foam and acetate fiber are prepared into binary compound filter candle according to the total length ratio for 1:1.5.Cigarette not contain polyurethane/carbon nano-tube hydridization flexible foam section in the filter tip is a control sample; On smoking machine, carry out the cigarette smoking test according to the standard aspiration condition, and carry out the detection of main flume CO, phenol, benzo [a] pyrene, NNK and hydrogen cyanide burst size according to standard GB/T23356-2009, YC/T255-2008, GB/T21130-2007, GB/T 23228-2008 and YC/T 403-2011.Analysis result is seen table 1.
Embodiment 4:
By mass ratio take by weighing 55% molecular weight distribution be the titania nanotube of 5000 PPG, 5% deionized water, 0.2% triethylene diamine, 0.1% stannous octoate, 0.2% silicone oil and 25% in beaker, high-speed stirred is fully mixed it; Then, quick toluene di-isocyanate(TDI) with 14.5% adds wherein under stirring, pours mould into after mixing; After foam is initiated and is solidified, it is moved into 50 ℃ of incubator slaking 2h, finally demould promptly obtains polyurethane/titania nanotube hydridization flexible foam.This foam and acetate fiber are prepared into binary compound filter candle according to the total length ratio for 1:1.Cigarette not contain polyurethane/titania nanotube hydridization flexible foam section in the filter tip is a control sample; On smoking machine, carry out the cigarette smoking test according to the standard aspiration condition, and carry out the detection of main flume CO, phenol, benzo [a] pyrene, NNK and hydrogen cyanide burst size according to standard GB/T23356-2009, YC/T255-2008, GB/T21130-2007, GB/T 23228-2008 and YC/T 403-2011.Analysis result is seen table 1.
Embodiment 5:
By mass ratio take by weighing 58% molecular weight distribution be the nanometer lanthanum sesquioxide of 3000 PPG, 4% distilled water, 0.15% triethylene diamine, 0.1% stannous octoate, 4% silicone oil and 5% in beaker, high-speed stirred is fully mixed it; Then, quick methyl diphenylene diisocyanate with 28.75% adds wherein under stirring, pours mould into after mixing; After foam is initiated and is solidified, it is moved into 50 ℃ of incubator slaking 2h, finally demould promptly obtains polyurethane/nano lanthanum sesquioxide hydridization flexible foam.This foam and acetate fiber are prepared into binary compound filter candle according to the total length ratio for 1:2.Cigarette not contain polyurethane/nano lanthanum sesquioxide hydridization flexible foam section in the filter tip is a control sample; On smoking machine, carry out the cigarette smoking test according to the standard aspiration condition, and carry out the detection of main flume CO, phenol, benzo [a] pyrene, NNK and hydrogen cyanide burst size according to standard GB/T23356-2009, YC/T255-2008, GB/T21130-2007, GB/T 23228-2008 and YC/T 403-2011.Analysis result is seen table 1.
Can find out from table 1 result: material of the present invention can be used for the production of binary composite filter tip, can reduce CO, phenol, benzo [a] pyrene, NNK and hydrogen cyanide burst size in the cigarette mainstream flue gas more than 30%.
The burst size testing result of CO, phenol, benzo [a] pyrene, NNK and hydrogen cyanide in the cigarette mainstream flue gas among the table 1 embodiment 1-5:
Claims (8)
1. reduce the method for cigarette mainstream flue gas harmful components burst size, it is characterized in that: adopt polyurethane/inorganic nano material hydridization flexible foam, with the compound binary compound filter candle that is prepared into of common acetate fiber, cigarette becomes cigarette to prop up.
2. the method for reduction cigarette mainstream flue gas harmful components burst size according to claim 1 is characterized in that, said polyurethane/inorganic nano material hydridization flexible foam is made up of following composition and weight proportion thereof:
3. the method for reduction cigarette mainstream flue gas harmful components burst size according to claim 2 is characterized in that, said PPG is that molecular weight distribution is the PPG of 2800-6000.
4. the method for reduction cigarette mainstream flue gas harmful components burst size according to claim 2 is characterized in that said isocyanates is methyl diphenylene diisocyanate or toluene di-isocyanate(TDI).
5. the method for reduction cigarette mainstream flue gas harmful components burst size according to claim 2 is characterized in that said water is distilled water or deionized water.
6. the method for reduction cigarette mainstream flue gas harmful components burst size according to claim 2 is characterized in that said tin catalyst is stannous octoate or dibutyl tin laurate.
7. the method for reduction cigarette mainstream flue gas harmful components burst size according to claim 2; It is characterized in that said inorganic nano material is a kind of of nano zine oxide, nano magnesia, nano cupric oxide, nano-nickel oxide, nano oxidized praseodymium, nano-stannic oxide, nano silicon, nano titanium oxide, nano zirconium dioxide, nano ceric oxide, nano-aluminium oxide, nanometer chrome green, nanometer manganese sesquioxide managnic oxide, nanometer neodymium oxide, nanometer yttria, nanometer samarium sesquioxide, nanometer Dysprosium trioxide, nanometer lanthanum sesquioxide, titania nanotube, CNT.
8. the method for reduction cigarette mainstream flue gas harmful components burst size according to claim 1; It is characterized in that; Said common acetate fiber section and polyurethane/inorganic nano material hydridization flexible foam section is compounded to form binary compound filter candle, and common acetate fiber section of compound tense and polyurethane/inorganic nano material hydridization flexible foam section is alternately arranged; And the total length of acetate fiber section and polyurethane/inorganic nano material hydridization flexible foam section is than being 1:2～1, and wherein common acetate fiber section is at the end of filter stick, and polyurethane/inorganic nano material hydridization flexible foam section promptly contacts pipe tobacco at the front end of filter stick.
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| CN2012102393913A CN102754921A (en) | 2012-07-11 | 2012-07-11 | Method for reducing release of objectionable constituents in main stream smoke of cigarettes |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102987559A (en) * | 2012-12-27 | 2013-03-27 | 安徽中烟工业有限责任公司 | Composite filter stick capable of selectively reducing releasing amount of harmful phenol in main stream smoke of cigarettes |
| CN103054190A (en) * | 2013-02-05 | 2013-04-24 | 大亚科技股份有限公司 | Composite tobacco filter tip rod with added nanosilicon dioxide |
| CN103462222A (en) * | 2013-05-30 | 2013-12-25 | 贵州中烟工业有限责任公司 | Cigarette filter containing ultralong TiO2 aquo-complex nanotube and TiO2 nanometer powder |
| CN105797578A (en) * | 2016-05-12 | 2016-07-27 | 宁波钛安新材料科技有限公司 | Polyurethane foam air-purification filter screen and preparation method thereof |
| CN106858718A (en) * | 2017-04-10 | 2017-06-20 | 滁州卷烟材料厂 | A kind of filter tip for reducing harmful constituents in cigarette flue gas |
| CN113729261A (en) * | 2015-06-09 | 2021-12-03 | 上海烟草集团有限责任公司 | Additive for reducing nitrosamine content in tobacco leaves and redrying processing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6273095B1 (en) * | 1998-07-20 | 2001-08-14 | Jong-Pyng Hsu | Cigarette filter which removes carcinogens and toxic chemicals |
| CN1649946A (en) * | 2000-11-21 | 2005-08-03 | 翁特威克灵比希尔产品有限公司 | Process for producing an open celled foam |
-
2012
- 2012-07-11 CN CN2012102393913A patent/CN102754921A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6273095B1 (en) * | 1998-07-20 | 2001-08-14 | Jong-Pyng Hsu | Cigarette filter which removes carcinogens and toxic chemicals |
| CN1649946A (en) * | 2000-11-21 | 2005-08-03 | 翁特威克灵比希尔产品有限公司 | Process for producing an open celled foam |
Non-Patent Citations (2)
| Title |
|---|
| LETIZIA VERDOLOTTI等: "A novel hybrid PU-alumina flexible foam with superior hydrophilicity and adsorption of carcinogenic compounds from tobacco smoke", 《MICROPOROUS AND MESOPOROUS MATERIALS》, vol. 151, 15 March 2012 (2012-03-15), pages 79 - 87, XP028344021, DOI: doi:10.1016/j.micromeso.2011.11.010 * |
| 张勇: "《中国优秀硕士学位论文全文数据库工程科技Ⅰ期》", 31 December 2011, article "无机纳米材料改性聚氨酯泡沫塑料的制备及性能研究" * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102987559A (en) * | 2012-12-27 | 2013-03-27 | 安徽中烟工业有限责任公司 | Composite filter stick capable of selectively reducing releasing amount of harmful phenol in main stream smoke of cigarettes |
| CN103054190A (en) * | 2013-02-05 | 2013-04-24 | 大亚科技股份有限公司 | Composite tobacco filter tip rod with added nanosilicon dioxide |
| CN103462222A (en) * | 2013-05-30 | 2013-12-25 | 贵州中烟工业有限责任公司 | Cigarette filter containing ultralong TiO2 aquo-complex nanotube and TiO2 nanometer powder |
| CN113729261A (en) * | 2015-06-09 | 2021-12-03 | 上海烟草集团有限责任公司 | Additive for reducing nitrosamine content in tobacco leaves and redrying processing method |
| CN113729261B (en) * | 2015-06-09 | 2022-10-28 | 上海烟草集团有限责任公司 | Additive for reducing nitrosamine content in tobacco leaves and redrying processing method |
| CN105797578A (en) * | 2016-05-12 | 2016-07-27 | 宁波钛安新材料科技有限公司 | Polyurethane foam air-purification filter screen and preparation method thereof |
| CN106858718A (en) * | 2017-04-10 | 2017-06-20 | 滁州卷烟材料厂 | A kind of filter tip for reducing harmful constituents in cigarette flue gas |
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Application publication date: 20121031 |