CN102987559B - Composite filter stick capable of selectively reducing releasing amount of harmful phenol in main stream smoke of cigarettes - Google Patents
Composite filter stick capable of selectively reducing releasing amount of harmful phenol in main stream smoke of cigarettes Download PDFInfo
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Abstract
The invention discloses a composite filter stick capable of selectively reducing releasing amount of harmful phenol in main stream smoke of cigarettes. The composite filter stick adopts carbon namometer tube mixture as cigarette filter additives to prepare a binary composite filter stick, when a cigarette is rolled up, the phenol releasing amount in the main stream smoke can be reduced by more than 30% under the additive proportion range of 5-30mg of each filter, and the smoking quality of the cigarette cannot be changed obviously.
Description
One, technical field
The invention belongs to the lowering harm and decreasing coking technical field of tobacco industry, be specifically related to the method for harmful components phenol burst size in a kind of selectivity reducing cigarette main flume.
Two, background technology
At present, along with the deep propelling of tobacco business lowering harm and decreasing coking work, develop reducing in cigarette smoke in tar content, the alternative harmful components that reduce in cigarette smoke, the novel filter tip material that improves smoking property of cigarette security is a study hotspot of current tobacco science and technology.In cigarette mainstream flue gas, have the multiple harmful components with carcinogenic or syncarcinogenesis, aldehydes matter is a wherein important class.In cigarette smoke, phenolic compound is mainly derived from the cracking of the polyphenols in tobacco leaf, has carcinogenic and syncarcinogenesis, and it also has more intense spread effect to respiratory mucosa, affects the suction quality of cigarette.
CNT, as typical monodimension nanometer material, is widely used because having excellent mechanical property, electric conductivity and chemical property.Particularly, CNT is owing to having larger specific area, special pipeline configuration, rich surface contain the class graphite linings gap between polyene structure and the multi-walled carbon nano-tubes of pi-electron, become the material of aldehydes matter in potential adsorbable cigarette mainstream flue gas.In fact, CNT is as the existing a small amount of report of the application study in sorbing material lowering harm and decreasing coking field in cigarette industry present stage.The Chinese invention patent of application number 200910308650.1 is open " a kind of additive and cigarette thereof that reduces harmful constituents in cigarette flue gas " once, to be dispersed in CNT preparation in aqueous surfactant solution as cigarette shreds additive, be sprayed on tobacco leaf in production of cigarettes charging technology process by pipe tobacco weight 1-25%, after drying silk processing, CNT is attached to pipe tobacco surface just dispersedly.Use this additive can remove tea phenol and the catechol of 3.0-28.3% in cigarette mainstream flue gas, can also reduce tar content 3.4-20.4% in flue gas, and the original color and luster of pipe tobacco and jealous substantially constant." applied surface science " (Applied Surface Science, 2006 of Ai Siweier (Elsevier) company of Holland; 252:2933) magazine " nicotine and tar in oxide/carbon nanometer tube absorption cigarette mainstream flue gas " the article pointed out, can remove most T/N in main flume among the CNT of 20-30mg is added to filter tip.
At present, CNT is mainly by arc discharge method, laser ablation method, chemical vapour deposition technique and catalysis synthesis process preparation.Adopt arc discharge method to prepare carbon nanotube technology fairly simple, but reaction consumed energy is too large.Laser ablation method is because the reason of equipment has limited its production scale.Chemical vapour deposition technique generally uses low molecular hydrocarbons and low molecular compound as carbon source, allow gaseous hydrocarbon by being attached with the template of catalyst particles, under the condition of 800-1200 ℃, decompose Formed nanotube, but be applied in industrial processes and must use catalyst, and cost of material is higher.Solid-phase pyrolysis is to adopt at high temperature pyrolysis carbon nano-tube of the metastable solid of conventional carbon containing, does not need catalyst, and is growth in situ, but be subject to the restriction of raw material, and production can not scale and serialization.As can be seen here, above preparation method has with high costs and shortcoming process conditions complexity, is therefore not suitable in tobacco business industrial application.
In recent years, using polymer as carbon source, the method for utilizing Production by Catalytic Combustion Process to prepare CNT starts to occur.The Tang Tao of Changchun Applied Chemistry Research Inst., Chinese Academy of Sciences once adopted polyolefin, solubilizer and organic modification montmonrillonite, ni-loaded catalyst in definite composition ratio melting mixing in banbury or double screw extruder, on crucible, heat by flame, make it 660-850 ℃ of burning, obtain carbon nanotube mixture, then obtain CNT through purifying.Professor Hu Yuan of Chinese University of Science and Technology once adopted organically-modified basic zirconium phosphate catalysis containing cinnamic polymer and/or containing the method for the polymer of acrylonitrile and utilize catalyzing and carbonizing Biodegradable material to prepare CNT, and these preparation methods' realization makes the preparation technology of carbon nano-tube material and cost obtain further simplification and reduction.It should be noted that and utilize Production by Catalytic Combustion Process to prepare CNT, first the first stage can obtain the mixture of CNT, needs afterwards just can obtain CNT through further purifying.The mixture of this CNT is mainly made up of CNT, lamellar compound, catalyst and a small amount of amorphous carbon, and this mixed system makes it to have special absorption and catalytic effect to tar and the crucial harmful components of main flume compared with pure nano-carbon tube.Particularly, compared with pure nano-carbon tube, obtain in this carbon mano-tube composite technique simpler, also cheaper in price.Therefore, develop the carbon nanotube mixture material that can be applicable to tobacco business production and energy selectivity reducing cigarette main flume harmful components burst size, there is positive impetus for the lifting of tobacco business lowering harm and decreasing coking technical research level.
Three, summary of the invention
The present invention aims to provide the composite filter of harmful components phenol burst size in a kind of selectivity reducing cigarette main flume, and technical problem to be solved is the burst size of selecting phenol in suitable additive selectivity reducing cigarette main flume.
The present invention adopts carbon nanotube mixture as cigarette filter rod (filter tip) additive, is prepared into composite filter, and cigarette becomes cigarette.
The composite filter of harmful components phenol burst size in selectivity reducing cigarette main flume of the present invention, it is characterized in that: described composite filter is replaced and compoundly formed by acetate fiber section and carbon nanotube mixture/acetate fiber section, and in described composite filter, the ratio of the total length of acetate fiber section and the total length of carbon nanotube mixture/acetate fiber section is 1:3-1; The end of described composite filter is acetate fiber section, and the front end of described composite filter is carbon nanotube mixture/acetate fiber section, and the front end of composite filter contacts with pipe tobacco;
Described carbon nanotube mixture/acetate fiber section is distributed in acetate fiber and is formed by carbon nanotube mixture, and the addition of described carbon nanotube mixture is every composite filter 5-30mg;
The raw material of described carbon nanotube mixture is configured to by mass fraction:
Described polyolefin is selected from one or both in polypropylene, polyethylene, polystyrene;
Described solubilizer is selected from acid anhydrides polypropylene or acid anhydrides polyethylene; In described solubilizer, maleic anhydride grafting ratio is 0.5-3%.
Described organic modification montmonrillonite is selected from organically-modified sodium-based montmorillonite or organically-modified iron-based imvite;
The organically-modified sodium-based montmorillonite that the present invention uses is commercial, and organically-modified iron-based imvite is commercial or self-control.
The preparation method of homemade organically-modified iron-based imvite is:
In molar ratio for the ratio of 0.2-0.4:1.3-1.8:3.6-4.0 is mixed and be mixed with solution, adjust pH value of solution to 10-12 magnesium acetate or zinc acetate, iron chloride and sodium metasilicate, put into autoclave and react 10-50h in 160-180 ℃, obtain iron-based imvite; By iron-based imvite and cationic organic modifiers in mass ratio the ratio of 1:1-3 mix, join in distilled water in the ratio of liquid-solid mass ratio 80mL/g, in 60-140 ℃ of stirring reaction 5-50h, centrifugation, be washed with distilled water to neutrality, after being dried, obtain organically-modified iron-based imvite; Described cationic organic modifiers selects to DTAC, DTAB, hexadecyltrimethylammonium chloride, DTAB, OTAC or Cetyltrimethylammonium bromide.
The simple substance of described catalyst chosen from Fe, cobalt or nickel or oxide, hydroxide, chloride, sulfide, carbonate, sulfate, nitrate, oxalates, formates or the acetate of chosen from Fe, cobalt or nickel.
Described carbon nanotube mixture prepares by the following method:
Polyolefin, solubilizer, organic modification montmonrillonite and catalyst are obtained to polyolefin blend by banbury melt blending or twin-screw extrusion, then in air atmosphere or in nitrogen oxygen atmosphere atmosphere in 550-950 ℃ of sintering 10-50min, obtain carbon nanotube mixture.
The particle diameter of described carbon nanotube mixture is 100-300 order, and aperture is 1-100nm, specific area>=250m
2/ g.
In described nitrogen oxygen atmosphere atmosphere, the volume ratio of nitrogen and oxygen is 9-1:1.
Described banbury melt blending is that polyolefin and solubilizer are added in banbury, is heated to start to stir after molten condition, then adds organic modification montmonrillonite and catalyst, after melt blending is even, obtains polyolefin blend.
Described twin-screw extrusion is that each raw material is at room temperature mixed and obtains compound, then compound is added in double screw extruder, obtains polyolefin blend after melt extruding granulation.
Carbon nanotube mixture of the present invention can play the effect of phenol burst size in selectivity reducing cigarette main flume as filter stick additive, concrete principle is as follows:
Carbon nanotube mixture has larger specific area on the one hand, has stronger suction-operated for the phenol in main flume; On the other hand, in carbon nanotube mixture, contained carbon nano tube surface is the polyene structure that is rich in pi-electron, exists certain π-pi-conjugated effect with the pi-electron on phenyl ring, can Pyrogentisinic Acid produce suction-operated.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, composite filter reducing tar and reducing harm successful of the present invention.The carbon nanotube mixture that the present invention is selected, under the adding proportion scope of every filter tip 5-30mg of claim, can reach in elective reduction main flume harmful components phenol burst size more than 30%.
2, with low cost.The carbon nanotube mixture that the present invention is selected, preparation method is simple, and raw material sources are abundant and cheap, can mass production.
3, this patent is invented smoking property of cigarette quality without negative effect.
4, interpolation implementation is simple.In whole adding procedure, do not need to increase any production equipment, can not change existing production of cigarettes processing technology yet, technical implementation way is simple.
Four, accompanying drawing explanation
Fig. 1 is the transmission electron microscope picture of the carbon nanotube mixture of preparation in embodiment 1.As can be seen from Figure 1, carbon nanotube mixture of the present invention is hollow tubular structure, and diameter is at 20-40nm.
Fig. 2 is the scanning electron microscope (SEM) photograph of the carbon nanotube mixture of preparation in embodiment 3.As can be seen from Figure 2, carbon nanotube mixture of the present invention is mainly fiber tubulose and sheet, and pipe diameter is mainly distributed between 20-40nm, and distribution of lengths arrives several microns in hundreds of nanometer.
Fig. 3 is the transmission electron microscope picture of the carbon nanotube mixture of preparation in embodiment 5.As can be seen from Figure 3, carbon nanotube mixture of the present invention is hollow tubular structure, and diameter is at 20-40nm.
Five, the specific embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
Producer and the trade mark of the primary raw material that the embodiment of the present invention is used are as follows:
Polypropylene: Sinopec Yangzi Petrochemical Co, F401;
Polyethylene: Sinopec Yangzi Petrochemical Co, 5000s;
Polyethylene: SINOPEC Qilu Petro-Chemical Corp, 2012TN26;
Polystyrene: SINOPEC Beijing Yanshan Company, 666D;
Acid anhydrides polypropylene: Chinese Calvin plastic cement Science and Technology Ltd.;
Acid anhydrides polyethylene: Chinese Zouping hundred million Europe plasticizing Co., Ltds;
Organically-modified sodium-based montmorillonite: NANOCOR company of the U.S., I.44P;
Organically-modified sodium-based montmorillonite: NANOCOR company of the U.S., I.31PS;
Organically-modified sodium-based montmorillonite: NANOCOR company of the U.S., I.30P;
Embodiment 1:
The nickel oxide of organically-modified sodium-based montmorillonite I.44P with 10 mass parts of the acid anhydrides polypropylene of the polypropylene F401 of 60 mass parts, 10 mass parts (maleic anhydride grafting ratio is 0.5wt%), 20 mass parts is at room temperature mixed, then join in double screw extruder, blanking after melt pelletization, obtains polyolefin blend; Polyolefin blend is placed in crucible, adds a cover in the Muffle furnace that is placed on 950 ℃, after heating 10min, take out, in air, be cooled to room temperature, obtain carbon nanotube mixture.
Carbon nanotube mixture is added to materials'use as filter tip, sieve and process to 100 object particles, by uniform this particle to acetate fiber, obtain carbon nanotube mixture/acetate fiber compound, carbon nanotube mixture/acetate fiber compound and acetate fiber are made to composite filter according to the ratio of length 1:1, roll into cigarette, the addition of carbon nanotube mixture is that 5mg/ props up filter stick.Roll into cigarette sample in contrast using acetate fiber as filter stick, on smoking machine, carry out cigarette smoking test according to standard aspiration condition, and carry out the detection of main flume tar and phenol burst size according to standard GB/T19609-2004 and YC/T255-2008.Analysis result is in table 1.
The transmission electron microscope picture of the present embodiment carbon nanotube mixture is shown in Fig. 1, and as can be seen from Figure 1, carbon nanotube mixture of the present invention is hollow tubular structure, and diameter is at 20-40nm.
Embodiment 2:
By iron chloride, sodium metasilicate and zinc acetate in molar ratio 1.5:4.0:0.3 be mixed with solution, adjust pH to 11.2, put into autoclave in 160 ℃ reaction 24h, obtain iron-based imvite; Be the ratio of 1:2 is mixed the iron-based imvite of above-mentioned preparation with Cetyltrimethylammonium bromide after in mass ratio, be that 80ml/g joins in distilled water by liquid-solid mass ratio, 100 ℃ add thermal agitation 5h after centrifugation, be washed with distilled water to again neutrality, after being dried, obtain organically-modified iron-based imvite.
The acid anhydrides polypropylene of the polypropylene F401 of 90 mass parts, 1 mass parts (maleic anhydride grafting ratio is 3wt%), the organically-modified iron-based imvite of 8 mass parts and the iron oxide of 1 mass parts are at room temperature mixed, then join in double screw extruder, blanking after melt pelletization, obtains polyolefin blend; Polyolefin blend is placed in crucible, adds a cover in the Muffle furnace that is placed on 550 ℃, after heating 50min, take out, in air, be cooled to room temperature, obtain carbon nanotube mixture.
Carbon nanotube mixture is added to materials'use as filter tip, sieve and process to 300 object particles, by uniform this particle to acetate fiber, obtain carbon nanotube mixture/acetate fiber compound, carbon nanotube mixture/acetate fiber compound and acetate fiber are made to composite filter according to the ratio of length 1.5:1, roll into cigarette, the addition of carbon nanotube mixture is that 30mg/ props up filter stick.Roll into cigarette sample in contrast using acetate fiber as filter stick, on smoking machine, carry out cigarette smoking test according to standard aspiration condition, and carry out the detection of main flume tar and phenol burst size according to standard GB/T19609-2004 and YC/T255-2008.Analysis result is in table 1.
The scanning electron microscope (SEM) photograph of the present embodiment carbon nanotube mixture is shown in Fig. 2, and as can be seen from Figure 2, carbon nanotube mixture of the present invention is mainly fiber tubulose and sheet, and pipe diameter is mainly distributed between 20-40nm, and distribution of lengths arrives several microns in hundreds of nanometer.
Embodiment 3:
The cobalt hydroxide of organically-modified sodium-based montmorillonite I.31PS with 5 mass parts of the acid anhydrides polyethylene of the polyethylene 5000s of 80 mass parts, 5 mass parts (maleic anhydride grafting ratio is 2.5wt%), 10 mass parts is at room temperature mixed, then join in double screw extruder, blanking after melt pelletization, obtains polyolefin blend; Polyolefin blend is placed in to quartz ampoule, and passing into by nitrogen and oxygen is the gaseous mixture that 9:1 forms according to volume ratio, and quartz ampoule is placed in to the tube furnace of 750 ℃, after heating 20min, takes out, and is cooled to room temperature, obtains carbon nanotube mixture.
Carbon nanotube mixture is added to materials'use as filter tip, sieve and process to 200 object particles, by uniform this particle to acetate fiber, obtain carbon nanotube mixture/acetate fiber compound, carbon nanotube mixture/acetate fiber compound and acetate fiber are made to composite filter according to the ratio of length 2:1, roll into cigarette, the addition of carbon nanotube mixture is that 10mg/ props up filter stick.Roll into cigarette sample in contrast using acetate fiber as filter stick, on smoking machine, carry out cigarette smoking test according to standard aspiration condition, and carry out the detection of main flume tar and phenol burst size according to standard GB/T19609-2004 and YC/T255-2008.Analysis result is in table 1.
Embodiment 4:
By iron chloride, sodium metasilicate and zinc acetate in molar ratio 1.6:3.6:0.25 be mixed with solution, adjust pH to 10, put into autoclave in 170 ℃ reaction 36h, obtain iron-based imvite; Be the ratio of 1:3 is mixed the iron-based imvite of above-mentioned preparation with softex kw after in mass ratio, be that 80ml/g joins in distilled water by liquid-solid mass ratio, 80 ℃ add thermal agitation 24h after centrifugation, be washed with distilled water to again neutrality, after being dried, obtain organically-modified iron-based imvite.
The acid anhydrides polyethylene of the polystyrene 666D of 75 mass parts and 6 mass parts (maleic anhydride grafting ratio is 2wt%) is added in banbury, be heated to start to stir after molten condition, add again the organically-modified iron-based imvite of 11 mass parts and the iron simple substance of 3 mass parts, after melt blending is even, obtain polyolefin blend; Polyolefin blend is placed in to quartz ampoule, and passing into by nitrogen and oxygen is the gaseous mixture that 1:1 forms according to volume ratio, and quartz ampoule is placed in to the tube furnace of 700 ℃, after heating 30min, takes out, and is cooled to room temperature, obtains carbon nanotube mixture.
Carbon nanotube mixture is added to materials'use as filter tip, sieve and process to 150 object particles, by uniform this particle to acetate fiber, obtain carbon nanotube mixture/acetate fiber compound, carbon nanotube mixture/acetate fiber compound and acetate fiber are made to composite filter according to the ratio of length 3:1, roll into cigarette, the addition of carbon nanotube mixture is that 15mg/ props up filter stick.Roll into cigarette sample in contrast using acetate fiber as filter stick, on smoking machine, carry out cigarette smoking test according to standard aspiration condition, and carry out the detection of main flume tar and phenol burst size according to standard GB/T19609-2004 and YC/T255-2008.Analysis result is in table 1.
Embodiment 5:
The acid anhydrides polypropylene of the polyethylene 2012TN26 of 70 mass parts and 7 mass parts (maleic anhydride grafting ratio is 1wt%) is added in banbury, be heated to start to stir after molten condition, add again the nickel acetate of organically-modified sodium-based montmorillonite I.30P with 6 mass parts of 7 mass parts, after melt blending is even, obtain polyolefin blend; Polyolefin blend is placed in to quartz ampoule, and passing into by nitrogen and oxygen is the gaseous mixture that 4:1 forms according to volume ratio, and quartz ampoule is placed in to the tube furnace of 800 ℃, after heating 40min, takes out, and is cooled to room temperature, obtains carbon nanotube mixture.
Carbon nanotube mixture is added to materials'use as filter tip, sieve and process to 150 object particles, by uniform this particle to acetate fiber, obtain carbon nanotube mixture/acetate fiber compound, carbon nanotube mixture/acetate fiber compound and acetate fiber are made to composite filter according to the ratio of length 2.5:1, roll into cigarette, the addition of carbon nanotube mixture is that 18mg/ props up filter stick.Roll into cigarette sample in contrast using acetate fiber as filter stick, on smoking machine, carry out cigarette smoking test according to standard aspiration condition, and carry out the detection of main flume tar and phenol burst size according to standard GB/T19609-2004 and YC/T255-2008.Analysis result is in table 1.
The transmission electron microscope picture of the present embodiment carbon nanotube mixture is shown in Fig. 3, and as can be seen from Figure 3, carbon nanotube mixture has hollow tubular structure, and diameter is at 20-40nm.
Embodiment 6:
By iron chloride, sodium metasilicate and zinc acetate in molar ratio 1.8:4.0:0.2 be mixed with solution, adjust pH to 12, put into autoclave in 180 ℃ reaction 10h, obtain iron-based imvite; Be the ratio of 1:1 is mixed the iron-based imvite of above-mentioned preparation with hexadecyltrimethylammonium chloride after in mass ratio, be that 80ml/g joins in distilled water by liquid-solid mass ratio, 140 ℃ add thermal agitation 40h after centrifugation, be washed with distilled water to again neutrality, after being dried, obtain organically-modified iron-based imvite.
The mixture that 80 mass parts are made up of according to mass ratio 2:1 polypropylene F401 and polyethylene 2012TN26, the acid anhydrides polyethylene of 3 mass parts (maleic anhydride grafting ratio is 2wt%), the organically-modified iron-based imvite of 10 mass parts and the ferric nitrate of 5 mass parts at room temperature mix, then join in double screw extruder, blanking after melt pelletization, obtains polyolefin blend; Polyolefin blend is placed in crucible, adds a cover in the Muffle furnace that is placed on 850 ℃, after heating 25min, take out, in air, be cooled to room temperature, obtain carbon nanotube mixture.
Carbon nanotube mixture is added to materials'use as filter tip, sieve and process to 150 object particles, by uniform this particle to acetate fiber, obtain carbon nanotube mixture/acetate fiber compound, carbon nanotube mixture/acetate fiber compound and acetate fiber are made to composite filter according to the ratio of length 1:1, roll into cigarette, the addition of carbon nanotube mixture is that 25mg/ props up filter stick.Roll into cigarette sample in contrast using acetate fiber as filter stick, on smoking machine, carry out cigarette smoking test according to standard aspiration condition, and carry out the detection of main flume tar and phenol burst size according to standard GB/T19609-2004 and YC/T255-2008.Analysis result is in table 1.
Table 1 embodiment 1-6 adds main flume tar and the phenol burst size testing result of carbon nanotube mixture sample and control sample
| Sample title | Control sample | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Tar (mg props up) | 11.55 | 9.88 | 9.60 | 10.12 | 9.77 | 9.68 | 9.55 |
| Tar reduced rate (%) | - | 14.46 | 16.88 | 12.38 | 15.41 | 16.19 | 13.33 |
| Phenol (μ g props up) | 15.50 | 10.50 | 9.30 | 9.80 | 9.50 | 9.45 | 9.20 |
| Phenol reduced rate (%) | - | 32.20 | 40.00 | 36.77 | 38.71 | 39.03 | 40.65 |
As can be seen from Table 1: the composite filter tip that has added carbon nanotube mixture can reduce phenol burst size in cigarette mainstream flue gas more than 30%.
Claims (6)
1. the composite filter of harmful components phenol burst size in a selectivity reducing cigarette main flume, it is characterized in that: described composite filter is replaced and compoundly formed by acetate fiber section and carbon nanotube mixture/acetate fiber section, and in described composite filter, the ratio of the total length of acetate fiber section and the total length of carbon nanotube mixture/acetate fiber section is 1:3-1; The end of described composite filter is acetate fiber section, and the front end of described composite filter is carbon nanotube mixture/acetate fiber section;
Described carbon nanotube mixture/acetate fiber section is distributed in acetate fiber and is formed by carbon nanotube mixture, and the addition of described carbon nanotube mixture is every composite filter 5-30mg;
The raw material of described carbon nanotube mixture is configured to by mass fraction:
Described carbon nanotube mixture prepares by the following method:
Polyolefin, solubilizer, organic modification montmonrillonite and catalyst are obtained to polyolefin blend by banbury melt blending or twin-screw extrusion, then in air atmosphere or in nitrogen oxygen atmosphere atmosphere in 550-950 ℃ of sintering 10-50min, obtain carbon nanotube mixture;
The particle diameter of described carbon nanotube mixture is 100-300 order, and aperture is 1-100nm, specific area>=250m
2/ g.
2. composite filter according to claim 1, is characterized in that:
Described polyolefin is selected from one or both in polypropylene, polyethylene, polystyrene;
Described solubilizer is selected from acid anhydrides polypropylene or acid anhydrides polyethylene;
Described organic modification montmonrillonite is selected from organically-modified sodium-based montmorillonite or organically-modified iron-based imvite;
The simple substance of described catalyst chosen from Fe, cobalt or nickel or oxide, hydroxide, chloride, sulfide, carbonate, sulfate, nitrate, oxalates, formates or the acetate of chosen from Fe, cobalt or nickel.
3. composite filter according to claim 1 and 2, is characterized in that:
In described solubilizer, the percent grafting of maleic anhydride is 0.5-3%.
4. composite filter according to claim 1, is characterized in that:
Described banbury melt blending is that polyolefin and solubilizer are added in banbury, is heated to start to stir after molten condition, then adds organic modification montmonrillonite and catalyst, after melt blending is even, obtains polyolefin blend.
5. composite filter according to claim 1, is characterized in that:
Described twin-screw extrusion is that each raw material is at room temperature mixed and obtains compound, then compound is added in double screw extruder, obtains polyolefin blend after melt extruding granulation.
6. composite filter according to claim 1, is characterized in that:
In described nitrogen oxygen atmosphere atmosphere, the volume ratio of nitrogen and oxygen is 9-1:1.
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| CN106723343B (en) * | 2017-04-06 | 2020-04-14 | 上海烟草集团有限责任公司 | Composite cigarette filter stick capable of reducing tar release amount of cigarettes and preparation method thereof |
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| CN1080498A (en) * | 1992-06-30 | 1994-01-12 | 中国国际科技促进会 | Cigarette tar reducing filter material and production technology thereof |
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| CN101711603A (en) * | 2009-11-13 | 2010-05-26 | 湖南中烟工业有限责任公司 | Composite filter tip of cigarette and preparation process thereof |
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| CN102771894A (en) * | 2012-08-07 | 2012-11-14 | 湖南中烟工业有限责任公司 | Thread added cigarette holder capable of reducing harmfulness of cigarettes |
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