CN109275953A - A kind of preparation method of fiber base cigarette filter - Google Patents
A kind of preparation method of fiber base cigarette filter Download PDFInfo
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- CN109275953A CN109275953A CN201811484793.3A CN201811484793A CN109275953A CN 109275953 A CN109275953 A CN 109275953A CN 201811484793 A CN201811484793 A CN 201811484793A CN 109275953 A CN109275953 A CN 109275953A
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- rush
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
- A24D3/0208—Cutting filter materials
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/02—Manufacture of tobacco smoke filters
- A24D3/0204—Preliminary operations before the filter rod forming process, e.g. crimping, blooming
- A24D3/0212—Applying additives to filter materials
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
- A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/067—Use of materials for tobacco smoke filters characterised by functional properties
Abstract
The present invention relates to a kind of preparation methods of fiber base cigarette filter, belong to technical field of cigarettes.The present invention uses the mixed solution of isopropyl alcohol and water to pre-process wick grass fiber first, then pretreated wick grass fiber is carried out filtering processing under water/alcohol mixed solution infiltration of polyvinylpyrrolidone and is freeze-dried, obtain modified wick grass fiber, modified wick grass fiber is then cut into the fibre strip of length equalization, along axial close-packed arrays at cylindrical body, it is coated after filter-stick forming device is suppressed with filter tip forming paper, obtains fiber base cigarette filter.Filter tip prepared by the present invention has fine and close porous structure, has no significant effect to Cigarette Draw Resistance, raw material natural degradable, and physics duct is intercepted and is combined with chemical complexing absorption, tar and harmful ingredients in flue gas can be effectively reduced.
Description
Technical field
The present invention relates to a kind of preparation methods of fiber base cigarette filter, belong to technical field of cigarettes.
Background technique
Pollution and health hazard caused by smoking have become world's urgent problem to be solved.Tobacco smoke is that one kind contains
The mixture of 3800 multiple compounds, these compounds are by volatility, half volatile and the non-volatile compounds in gas phase
The aerosol of composition.Smoker's smoking is because they are to nicotine addiction.However in addition to nicotine, also contain in cigarette smoke
Various toxic compounds cause smoker to catch an illness and suffer from cancer.Although for many years both at home and abroad in terms of the exploitation of cigarette filter
Many effort are done, but most of cigarette filters are still made of acetate fiber.However, common acetate fiber mistake
Filter tip is unsatisfactory to the removal effect of toxic compounds in flue gas.In order to improve removal efficiency, people start to add into filter tip
Enter such as active carbon, zeolite even carbon nanotube additive, uses them to adsorb or decompose the noxious material in flue gas.
It on the other hand, is a complicated chemical production from the production of good fiber quality element resource such as broad leaf tree to acetate fiber
Process inherently generates a large amount of pollutions.Nowadays, cigarette quality and the standard of environmental protection are higher and higher in industrial production, this is more
Add and people is promoted to make great efforts to improve the removal efficiency of toxic compounds in flue gas.Therefore, it invents novel filter-tip material and goes conduct
The substitute of acetate fiber or polypropylene synthetic fibers is necessary.
China Patent Publication No. CN108158034A, publication date are on June 15th, 2018, denomination of invention are as follows: Yi Zhongfu
Close aerogel type cigarette filter tip materials preparation method, the invention be using sepiolite as raw material, it is modified and its
His substance it is compound again, finally obtain composite aerogel type filter tip material.Its advantage is that being imitated to the noxious substance in cigarette
Fruit highly significant, and there is good mechanical property.But compound required auxiliary material category is special, causes materials difficult, cost
It is excessively high, in addition raw material can not natural degradation, for absorption post-processing increase difficulty, it is more difficult to apply to the disposable volume of current mainstream
Cigarette.
Rush, herbaceos perennial often take its stem to dry and are used as medicine, have effects that clearing away the heart-fire, diuresis.In recent years
Come, people realize that there are natural space networks inside rush, and gradually start to carry out function exploration.Due to cigarette cigarette
Contain micron-sized aerosol in gas more, and the mesh inside rush is mostly nanoscale, therefore rush is just considered a kind of
Ideal cigarette filter material.
China Patent Publication No. CN101347266B, publication date are on December 22nd, 2010, denomination of invention are as follows: Yi Zhongjuan
The preparation method of cigarette filtering material, the invention are to use rush as raw material, pass through the techniques shape such as load-carrying processing, dry, granulation
Particle is adsorbed at cigarette, so that filter material of cigarette be made.Its advantage is that raw material is natural porous plant fiber, can be received using it
The absorption of meter level space network intercepts harmful substance, and cheap.But its adsorption mechanism is mainly physical absorption, relatively
It is promoted less in the adsorption effect of traditional filter tip, and particle does not have adhesiveness, it is not very practical at leakiness grain after stick.
China Patent Publication No. CN2757604Y, publication date are on 2 15th, 2006, denomination of invention are as follows: rush mistake
Filter tip cigarette, the invention are to be placed in a small amount of strip rush in cigarette filter in a manner of axial alignment, form novel filter
Mouth.Although it can reduce cigarette toxicity, rush is easily broken, and the process for being placed in filter stick is difficult, cannot achieve industrialization, and only
Physical absorption is carried out by porous structure, the adsorbance of harmful substances from flue gases is few, and adsorption effect is bad.
It is carried out in physical absorption currently, the mechanism of action of rush filter tip is only rested on using its reticular structure, though have not
Wrong effect, but compared to the chemisorption that additive is added and generates, still gap, is mainly reflected in the selection of absorption
In property and overall effect.
Therefore, how rush is modified, so that it has both multiple absorption during smoke filtration, was promoted
Effect is filtered, and finished product is stablized, there are industrialized potentiality, be critical issue instantly.
Summary of the invention
The purpose of the present invention is intended to overcome the deficiencies of existing technologies, provide it is a kind of based on polyvinyl pyrrolidone modified after
Rush prepares the preparation method of cigarette filter, so that smoke filtration has both multiple absorption, the tar in flue gas is effectively reduced
Etc. harmful substances.
A kind of preparation method of fiber base cigarette filter of the present invention, sequentially includes the following steps:
The preparation of a cleaning solution
Isopropyl alcohol and water is stirred after mixing and is configured to cleaning solution, wherein the volume ratio of isopropanol and water is 98:2
~90:10, stirring rate are 50~600r/min, and mixing time is 1~10min.
The preparation of b modified solution
Polyvinylpyrrolidone is placed in the mixed solution of second alcohol and water, is taken off under vacuum conditions after stirring and dissolving
Bubble processing, obtains modified solution, wherein the mass fraction of polyvinylpyrrolidone is 3~10%, and the volume ratio of second alcohol and water is
95:5~90:10, solution temperature are 40~80 DEG C, and mixing speed is 50~600r/min, and mixing time is 6~12h, vacuum ring
The vacuum degree in border is 0.05~0.1Mpa, and the time of deaeration processing is 8~12h.
The pretreatment of c rush
Rush is placed in the cleaning solution being formulated through a step, dries, is pre-processed after carrying out ultrasonication
Rush afterwards, wherein ultrasonic frequency is 20~60kHz, and ultrasonic temperature is 10~35 DEG C, and ultrasonic time is 15~20min,
Drying temperature is 40~60 DEG C, and drying time is 4~8h.
The modification of d rush
It will be placed in Buchner funnel through the pretreated rush of step c, in the modified solution infiltration that b step is formulated
Lower carry out negative pressure leaching, is put into pre-freeze in refrigerator later, and after the completion of pre-freeze, the rush after pre-freeze is moved into freeze drier
In, modified rush is obtained after vacuum freeze drying, wherein suction filtration negative pressure be 0.3~0.5MPa, filter the time be 3~
5min, pre-freezing temperature are -40~-30 DEG C, and the pre-freeze time is 6~12h, and the vacuum degree of vacuum freeze drying is 0.1~0.3MPa,
Vacuum freeze drying temperature is -55~-40 DEG C, and the vacuum freeze drying time is 6~12h.
The preparation of e fiber base cigarette filter
The modified rush of Step d is cut into strip, strip length is 2~3cm, along axial close-packed arrays at cylinder
Body is coated after filter-stick forming device is suppressed with filter tip forming paper, and fiber base cigarette filter is obtained, wherein fiber base cigarette
Modified strip rush contained by filter tip is 20~30.
The average molecular weight of the polyvinylpyrrolidone is 80000~130000.
Due to using above technical scheme, technical characterstic of the invention is: using polyvinylpyrrolidone to wick
Grass is modified, and polyvinylpyrrolidone is a kind of water soluble polymer, odorless, tasteless, nontoxic, and is had good
Caking property, viscosity increases with the increase of average molecular weight, so can be good at the outer wall for being attached to rush.When flat
It can be good at penetrating into the reticular structure inside rush in the case that average molecular weight is moderate, and dry using vacuum refrigeration
Dry method more completely remains it in the case where not influencing polyvinylpyrrolidone physical structure and molecular structure
It is formed and is mutually communicated or closed hole or network structure while institutional framework and mode of appearance, solvent are de- dry, it can be effective
Duct caused by due to solution local viscosity is uneven is avoided to block.Polyvinylpyrrolidonemolecules molecules structure has highly polar and easy shape
At the phthalein amine groups of hydrogen bond, this enables it to combine some polar micromolecules, while the oxygen atom of intramolecular, nitrogen-atoms are typical
Coordination atom, can generate complex compound from many different compounds makes in flue gas aerosol when with mainstream smoke contacts
Harmful substance water solubility enhancing not soluble in water, is more dissolved in vapor, so that coacervation occur, forms water-setting
Glue causes to be intercepted by mesh inside rush, achievees the effect that filtering out harmful matter.
Filtrate uses strip rush, due to the internal space network of rush itself, to passing through flue gas therein
Flow-disturbing and interception are carried out, the time of flue gas residence filtering can be increased while filtering, adsorption effect is obviously improved.And item
Uniform pore diameter inside shape rush, flue gas extend axially through wherein, flow speed stability, influence on Cigarette Draw Resistance little.Physical holes
Road is intercepted to be combined with chemical complexing absorption, to reach good filter effect.Cigarette filter prepared by the present invention can be effective
Tar and flue gas other harmful components, material natural degradable are reduced, porous structure is closely stablized, and to Cigarette Draw Resistance without obvious
It influences.
Specific embodiment
The present invention is specifically described combined with specific embodiments below.
The preparation method sequentially includes the following steps:
The preparation of a cleaning solution
Isopropyl alcohol and water is stirred after mixing and is configured to cleaning solution, wherein the volume ratio of isopropanol and water is 98:2
~90:10, stirring rate are 50~600r/min, and mixing time is 1~10min.
The preparation of b modified solution
Polyvinylpyrrolidone is placed in the mixed solution of second alcohol and water, is taken off under vacuum conditions after stirring and dissolving
Bubble processing, obtains modified solution, wherein the mass fraction of polyvinylpyrrolidone is 3~10%, and the volume ratio of second alcohol and water is
95:5~90:10, solution temperature are 40~80 DEG C, and mixing speed is 50~600r/min, and mixing time is 6~12h, vacuum ring
The vacuum degree in border is 0.05~0.1Mpa, and the time of deaeration processing is 8~12h.
The pretreatment of c rush
Rush is placed in the cleaning solution being formulated through a step, dries, is pre-processed after carrying out ultrasonication
Rush afterwards, wherein ultrasonic frequency is 20~60kHz, and ultrasonic temperature is 10~35 DEG C, and ultrasonic time is 15~20min,
Drying temperature is 40~60 DEG C, and drying time is 4~8h.
The modification of d rush
It will be placed in Buchner funnel through the pretreated rush of step c, in the modified solution infiltration that b step is formulated
Lower carry out negative pressure leaching, is put into pre-freeze in refrigerator later, and after the completion of pre-freeze, the rush after pre-freeze is moved into freeze drier
In, modified rush is obtained after vacuum freeze drying, wherein suction filtration negative pressure be 0.3~0.5MPa, filter the time be 3~
5min, pre-freezing temperature are -40~-30 DEG C, and the pre-freeze time is 6~12h, and the vacuum degree of vacuum freeze drying is 0.1~0.3MPa,
Vacuum freeze drying temperature is -55~-40 DEG C, and the vacuum freeze drying time is 6~12h.
The preparation of e fiber base cigarette filter
The modified rush of Step d is cut into strip, strip length is 2~3cm, along axial close-packed arrays at cylinder
Body is coated after filter-stick forming device is suppressed with filter tip forming paper, and fiber base cigarette filter is obtained, wherein fiber base cigarette
Modified strip rush contained by filter tip is 20~30.
The average molecular weight of the polyvinylpyrrolidone is 80000~130000.
Specific embodiment
Embodiment one
By above-mentioned processing step: being in mass ratio that 90:10 forms mixed solution by second alcohol and water, at room temperature, with 100r/
After mixed solution is stirred 1min by the speed of min, cleaning solution is obtained.The polyvinylpyrrolidone for being 80000 by average molecular weight
It is dissolved in dehydrated alcohol/water mixed solution of 95:5, forms the mixed solution that mass fraction is 3%, the water for being 50 DEG C in temperature
It bathes under environment, mixed solution is stirred into 8h with the speed of 50r/min, deaeration 8h in the environment of vacuum degree is 0.05MPa is obtained
Modified solution.Wick grass fiber is immersed in cleaning solution, with 20kHz, 10 DEG C of ultrasonic treatment 15min, is placed on 40 DEG C later
Dry 4h, obtains pretreated wick grass fiber in baking oven.Pretreated wick grass fiber is placed in Buchner funnel,
Under the infiltration of modified solution, 3min is filtered with negative pressure 0.3MPa, -40 DEG C of refrigerator pre-freeze 6h is put it into later, is put after taking-up
Enter vacuum freeze-drying 6h in the freeze drier that vacuum degree is 0.1MPa, temperature is -55 DEG C, obtains modified rush.Take 30
Root long degree is that the modified strip wick grass fiber of 2cm closely aligns, and filter tip forming paper is used after filter-stick forming device is suppressed
It is coated to get fiber base cigarette filter is arrived.
Embodiment two
By above-mentioned processing step: being in mass ratio that 91:9 forms mixed solution by second alcohol and water, at room temperature, with 50r/
After mixed solution is stirred 3min by the speed of min, cleaning solution is obtained.The polyvinylpyrrolidone for being 90000 by average molecular weight
It is dissolved in dehydrated alcohol/water mixed solution of 94:6, forms the mixed solution that mass fraction is 5%, the water for being 40 DEG C in temperature
It bathes under environment, mixed solution is stirred into 6h with the speed of 100r/min, deaeration 9h in the environment of vacuum degree is 0.06MPa is obtained
To modified solution.Wick grass fiber is immersed in cleaning solution, with 30kHz, 15 DEG C of ultrasonic treatment 16min, is placed on 45 later
Dry 5h, obtains pretreated wick grass fiber in DEG C baking oven.Pretreated wick grass fiber is placed in Buchner funnel,
Under the infiltration of modified solution, 3.5min is filtered with negative pressure 0.35MPa, puts it into -37 DEG C of refrigerator pre-freeze 7h later, is taken out
It is put into vacuum freeze-drying 7h in the freeze drier that vacuum degree is 0.15MPa, temperature is -50 DEG C afterwards, obtains modified rush.
Taking 28 root long degree is that the modified strip wick grass fiber of 2.5cm closely aligns, and uses filter tip after filter-stick forming device is suppressed
Forming paper is coated to arrive fiber base cigarette filter.
Embodiment three
By above-mentioned processing step: being in mass ratio that 93:7 forms mixed solution by second alcohol and water, at room temperature, with 70r/
After mixed solution is stirred 4min by the speed of min, cleaning solution is obtained.The polyvinylpyrrolidone for being 80000 by average molecular weight
It is dissolved in dehydrated alcohol/water mixed solution of 93:7, forms the mixed solution that mass fraction is 6%, the water for being 60 DEG C in temperature
It bathes under environment, mixed solution is stirred into 7h with the speed of 200r/min, deaeration 10h in the environment of vacuum degree is 0.07MPa is obtained
To modified solution.Wick grass fiber is immersed in cleaning solution, with 40kHz, 20 DEG C of ultrasonic treatment 17min, is placed on 50 later
Dry 6h, obtains pretreated wick grass fiber in DEG C baking oven.Pretreated wick grass fiber is placed in Buchner funnel,
Under the infiltration of modified solution, 4min is filtered with negative pressure 0.4MPa, -36 DEG C of refrigerator pre-freeze 8h is put it into later, after taking-up
It is put into vacuum freeze-drying 8h in the freeze drier that vacuum degree is 0.2MPa, temperature is -45 DEG C, obtains modified rush.It takes
27 root long degree be the modified strip wick grass fiber of 2.2cm closely align, after filter-stick forming device is suppressed with filter tip at
Type paper is coated to arrive fiber base cigarette filter.
Example IV
By above-mentioned processing step: being in mass ratio that 95:5 forms mixed solution by second alcohol and water, at room temperature, with 200r/
After mixed solution is stirred 5min by the speed of min, cleaning solution is obtained.The polyvinylpyrrolidone for being 100000 by average molecular weight
It is dissolved in dehydrated alcohol/water mixed solution of 95:5, forms the mixed solution that mass fraction is 7%, the water for being 65 DEG C in temperature
It bathes under environment, mixed solution is stirred into 9h with the speed of 300r/min, deaeration 8.5h in the environment of vacuum degree is 0.08MPa,
Obtain modified solution.Wick grass fiber is immersed in cleaning solution, with 45kHz, 25 DEG C of ultrasonic treatment 18min, is placed on later
Dry 7h, obtains pretreated wick grass fiber in 55 DEG C of baking ovens.Pretreated wick grass fiber is placed in Buchner funnel
In, under the infiltration of modified solution, 4.5min is filtered with negative pressure 0.45MPa, puts it into -35 DEG C of refrigerator pre-freeze 9h later,
It is put into vacuum freeze-drying 9h in the freeze drier that vacuum degree is 0.25MPa, temperature is -40 DEG C after taking-up, obtains modified lamp
Core grass.Taking 25 root long degree is that the modified strip wick grass fiber of 2.3cm closely aligns, and is used after filter-stick forming device is suppressed
Filter tip forming paper is coated to arrive fiber base cigarette filter.
Embodiment five
By above-mentioned processing step: being in mass ratio that 96:4 forms mixed solution by second alcohol and water, at room temperature, with 300r/
After mixed solution is stirred 6min by the speed of min, cleaning solution is obtained.The polyvinylpyrrolidone for being 110000 by average molecular weight
It is dissolved in dehydrated alcohol/water mixed solution of 92:8, forms the mixed solution that mass fraction is 8%, the water for being 70 DEG C in temperature
It bathes under environment, mixed solution is stirred into 10h with the speed of 400r/min, deaeration 9.5h in the environment of vacuum degree is 0.09MPa,
Obtain modified solution.Wick grass fiber is immersed in cleaning solution, with 50kHz, 30 DEG C of ultrasonic treatment 19min, is placed on later
Dry 8h, obtains pretreated wick grass fiber in 60 DEG C of baking ovens.Pretreated wick grass fiber is placed in Buchner funnel
In, under the infiltration of modified solution, 5min is filtered with negative pressure 0.5MPa, -34 DEG C of refrigerator pre-freeze 10h is put it into later, takes
It is put into vacuum freeze-drying 10h in the freeze drier that vacuum degree is 0.3MPa, temperature is -50 DEG C after out, obtains modified wick
Grass.Taking 24 root long degree is that the modified strip wick grass fiber of 2.6cm closely aligns, with filter after filter-stick forming device is suppressed
Mouth forming paper is coated to arrive fiber base cigarette filter.
Embodiment six
By above-mentioned processing step: being in mass ratio that 97:3 forms mixed solution by second alcohol and water, at room temperature, with 400r/
After mixed solution is stirred 8min by the speed of min, cleaning solution is obtained.The polyvinylpyrrolidone for being 120000 by average molecular weight
It is dissolved in dehydrated alcohol/water mixed solution of 91:9, forms the mixed solution that mass fraction is 9%, the water for being 75 DEG C in temperature
It bathes under environment, mixed solution is stirred into 11h with the speed of 500r/min, deaeration 11h in the environment of vacuum degree is 0.06MPa,
Obtain modified solution.Wick grass fiber is immersed in cleaning solution, with 55kHz, 35 DEG C of ultrasonic treatment 20min, is placed on later
Dry 7.5h, obtains pretreated wick grass fiber in 40 DEG C of baking ovens.Pretreated wick grass fiber is placed in Bu Shi leakage
In bucket, under the infiltration of modified solution, 3min is filtered with negative pressure 0.3MPa, puts it into -32 DEG C of refrigerator pre-freeze 11h later,
It is put into vacuum freeze-drying 11h in the freeze drier that vacuum degree is 0.1MPa, temperature is -42 DEG C after taking-up, obtains modified lamp
Core grass.Taking 22 root long degree is that the modified strip wick grass fiber of 2.8cm closely aligns, and is used after filter-stick forming device is suppressed
Filter tip forming paper is coated to arrive fiber base cigarette filter.
Embodiment seven
By above-mentioned processing step: being in mass ratio that 98:2 forms mixed solution by second alcohol and water, at room temperature, with 600r/
After mixed solution is stirred 10min by the speed of min, cleaning solution is obtained.The polyvinylpyrrolidine for being 130000 by average molecular weight
Ketone is dissolved in dehydrated alcohol/water mixed solution of 90:10, forms the mixed solution that mass fraction is 10%, is 80 DEG C in temperature
Water bath under, mixed solution is stirred into 12h with the speed of 600r/min, deaeration in the environment of vacuum degree is 0.1MPa
12h obtains modified solution.Wick grass fiber is immersed in cleaning solution, with 60kHz, 35 DEG C of ultrasonic treatments 20min, Zhi Houfang
The dry 5.5h in 50 DEG C of baking ovens is set, pretreated wick grass fiber is obtained.Pretreated wick grass fiber is placed in cloth
In family name's funnel, under the infiltration of modified solution, 4min is filtered with negative pressure 0.4MPa, puts it into -30 DEG C of refrigerator pre-freeze later
12h is put into vacuum freeze-drying 12h in the freeze drier that vacuum degree is 0.2MPa, temperature is -52 DEG C, obtains modified after taking-up
Rush.Taking 20 root long degree is that the modified strip wick grass fiber of 3cm closely aligns, after filter-stick forming device is suppressed
It is coated with filter tip forming paper to get fiber base cigarette filter is arrived.
Claims (2)
1. a kind of preparation method of fiber base cigarette filter, it is characterised in that: the preparation method sequentially includes the following steps:
The preparation of a cleaning solution
Isopropyl alcohol and water is stirred after mixing and is configured to cleaning solution, wherein the volume ratio of isopropanol and water is 98:2~90:
10, stirring rate is 50~600r/min, and mixing time is 1~10min；
The preparation of b modified solution
Polyvinylpyrrolidone is placed in the mixed solution of second alcohol and water, is carried out at deaeration under vacuum conditions after stirring and dissolving
Reason, obtains modified solution, wherein the mass fraction of polyvinylpyrrolidone is 3~10%, and the volume ratio of second alcohol and water is 95:5
~90:10, solution temperature are 40~80 DEG C, and mixing speed is 50~600r/min, and mixing time is 6~12h, vacuum environment
Vacuum degree is 0.05~0.1Mpa, and the time of deaeration processing is 8~12h；
The pretreatment of c rush
Rush is placed in the cleaning solution being formulated through a step, dries, obtains pretreated after carrying out ultrasonication
Rush, wherein ultrasonic frequency is 20~60kHz, and ultrasonic temperature is 10~35 DEG C, and ultrasonic time is 15~20min, drying
Temperature is 40~60 DEG C, and drying time is 4~8h；
The modification of d rush
To be placed in Buchner funnel through the pretreated rush of step c, under the infiltration of modified solution that b step is formulated into
Row negative pressure leaching, is put into pre-freeze in refrigerator later, after the completion of pre-freeze, the rush after pre-freeze is moved into freeze drier, very
Modified rush is obtained after vacuum freecing-dry, wherein suction filtration negative pressure is 0.3~0.5MPa, and the suction filtration time is 3~5min,
Pre-freezing temperature is -40~-30 DEG C, and the pre-freeze time is 6~12h, and the vacuum degree of vacuum freeze drying is 0.1~0.3MPa, vacuum
Being freeze-dried temperature is -55~-40 DEG C, and the vacuum freeze drying time is 6~12h；
The preparation of e fiber base cigarette filter
The modified rush of Step d is cut into strip, strip length is 2~3cm, along axial close-packed arrays at cylindrical body, warp
It is coated after filter-stick forming device compacting with filter tip forming paper, obtains fiber base cigarette filter, wherein fiber base cigarette filter institute
It is 20~30 containing modified strip rush.
2. a kind of preparation method of fiber base cigarette filter as described in claim 1, it is characterised in that: the polyethylene pyrrole
The average molecular weight of pyrrolidone is 80000~130000.
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| CN113944065A (en) * | 2021-09-29 | 2022-01-18 | 河南中烟工业有限责任公司 | Harm-reducing cigarette paper and preparation method thereof |
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| CN113944065B (en) * | 2021-09-29 | 2023-03-21 | 河南中烟工业有限责任公司 | Harm-reducing cigarette paper and preparation method thereof |
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