CN103103633B - Modified polylactic acid filament bundle and filter rod used for cigarette and preparation method - Google Patents
Modified polylactic acid filament bundle and filter rod used for cigarette and preparation method Download PDFInfo
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- CN103103633B CN103103633B CN201310048812.9A CN201310048812A CN103103633B CN 103103633 B CN103103633 B CN 103103633B CN 201310048812 A CN201310048812 A CN 201310048812A CN 103103633 B CN103103633 B CN 103103633B
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
- D01F6/625—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters derived from hydroxy-carboxylic acids, e.g. lactones
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
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Abstract
The invention relates to a modified polylactic acid filament bundle and a filter rod used for cigarette and a preparation method, wherein the modified polylactic acid filament bundle is prepared by heating, fusing, mixing, drafting, curling, drying and forming of at least two of three raw materials of PLA-1, PLA-2 and PLA-3. The invention has the beneficial effects that three polylactic acids are mixed according to a certain proportion, the levorgyration content in the raw material is reduced, and the filament bundle surface crystallization degree is reduced, the filament bundle surface structure is loosened and unordered, so that when the filter rod is formed, a glyceryl triacetate plasticizer is applied, the filament bundle enables bonding and swelling, the hardness can reach more than 87% with low filling amount of the filament bundle, so that the utility value is provided. By analysis and detection, compared with an acetate fiber filter rod cigarette, the polylactic acid filament bundle filter rod has the conventional component release amount of flue gas similar to that of the acetate fiber filter rod cigarette, but has improved sensory quality; because polylactic acid has biodegradable characteristic, the environmental pollution is reduced.
Description
Technical field
The invention belongs to cigarette filter tip materials and preparing technical field thereof, be specifically related to a kind of polylactic acid tobacco tow and filter stick and preparation method thereof of modification.
Background technology
Cigarette filter is an important component part of cigarette.As cigarette filter-tip material, except having good spinning property, also has a lot of unique requirements: the filter stick that (1) is rolled by it is nontoxic, tasteless, security is good; (2) tow good stability, can meet the requirement of filter stick formation equipment and process; (3) there is suitable rigidity and crimp property, make it that there is good elasticity and opening character, when less tow loading, after adding plasticizer or adhesive, filter stick meets certain hardness, resistance to suction and appearance requirement, has higher to go out excellent rate, has practical value; (4) in cigarette smoking process, filter tip does not subside, distortion; (5) filter stick has higher filter efficiency to harmful ingredients in flue gas.Up to now, a lot of fiber achieves suitability for industrialized production, but real commercial cigarette filter tip materials only has cellulose diacetate and polypropylene two kinds.
Cellulose diacetate fibers (vinegar is fine) is a kind of function admirable, applies general filter-tip material, and its selection, in perennial high-quality timber, adopts the mode of dry spinning, the obtained filter tow being suitable for cigarette.Polar group containing strong polarity on the fine molecule side chain of vinegar, tow surface has micropore and harsh feeling, so diacetate fiber is to the harmful components in flue gas, has physical absorption and chemisorbed double effects simultaneously, and it filters and absorption property excellence; And in the process of producing filter stick, carry out plasticising, bonding by adding triacetyl glycerine, when less tow loading, filter stick meeting the quality requirement such as hardness, resistance to suction, having and higher going out excellent rate.But the raw material producing cellulose diacetate are perennial high-quality timber, China at present can not be self-supporting, main dependence import, the more important thing is, along with the continuous expansion of domestic tobacco enterprise output, the demand of the fine filter stick of vinegar is grown with each passing day, but diacetate fiber manufacturing enterprise domestic at present can not meet the demand of tobacco enterprise completely, cause the situation that vinegar is fine in short supply, limit further developing of China's tobacco business to a certain extent.In addition, wood pulp production, cellulose esterification and cellulose acetate spinning are with more serious pollution problem, and production cost is high, expensive, and compared with timber, the biodegradability of cellulose acetate is significantly deteriorated.
Advantages such as polypropylene cigarette filter tow, as the distinctive a kind of filtering material of China's cigarette industry, has raw material abundance at initial stage of development, cheap and being greatly developed, and make a great contribution for China's tobacco business cost efficiency.Pp material takes from oil, adopts the mode of melt spinning, and obtained fibre bundle is in the process of producing filter stick, bond by adding special adhesive, when less tow loading, filter stick meets the quality requirement such as hardness, resistance to suction, has higher to go out excellent rate.But because polypropylene is the highly stable apolar substance of a kind of structure, itself is without any polar group, tow smooth surface, its adsorption capacity can not show a candle to acetate fiber, smoke filtering effect is poor, has stronger acid during suction, generally can only for Low-end Cigarettes; Meanwhile, polypropylene is long chain hydrocarbon, can not biodegradation, causes severe contamination to environment; In addition, petroleum resources are day by day exhausted, and increasing price of raw materials is fast, and polyacrylic price advantage is just progressively lost.In recent years, along with the adjustment of tobacco business product structure, China's cigarette class improves constantly, and Low-end Cigarettes consumption declines year by year, and the third fine consumption reduces year by year, and trend is progressively withdrawn from the market.
No matter from the angle of resource, or reduce the angle of environmental pollution, find a kind of combination property fine close to vinegar, the novel pipe tobacco of price relative moderate again, substitute the production that polypropylene material is used for low and middle-grade cigarette, and Some substitute vinegar fibre is used for the production of medium-to-high grade cigarette, to make up the deficiency of vinegar fibre supply, be tobacco business urgent problem.
PLA is a kind of Novel environment-friendlymaterial material, has good circular regeneration and biological degradability.It with reproducible plant resources (corn, wheat, beet, rice, potato, sweet potato etc.) and organic waste (roots, stem, leaf, skin etc. of corncob or other crops) for raw material, break away from the dependence to timber and petroleum resources, meet the requirement of international community's sustainable development; The energy consumption of PLA, lower than the various fiber such as polypropylene and cellulose diacetate, is a kind of macromolecular material of low-resource carrying capacity of environment; PLA can complete biodegradable, in natural environment, understand natural decomposition through certain hour be water and carbon dioxide, do not cause environmental pollution, the carbon dioxide produced is re-used by the photosynthesis of plant, becoming eternal, to close a carbon cycle system, is genuine " green material "; PLA has good processing characteristics, and melt spinning method can be adopted to produce; Acid fiber by polylactic is similar to the fine structure of vinegar, and molecular surface contains abundant polar group; To polar substances, there is stronger affinity, chemical reaction can be carried out with tar component and lower-molecular substance, reactant firmly stays fiber surface, simultaneously, tow surface has micropore and harsh feeling, to in the adsorption process of flue gas, have physical absorption and chemisorbed double effects, the filter stick that this tow is produced is obvious to the harmful substance filter effect in flue gas simultaneously.Therefore, PLA is expected to become the suitable material preparing cigarette filter filament.
Polylactic fibre product is used as cigarette filtering material, there is the comprehensive advantages such as aboundresources, the excellent feature of environmental protection, good adsorptivity, security reliably, good molding processibility and economy; Applying of product, widens raw material channel for China's tobacco business, cost efficiency has positive realistic meaning, will produce good economic results in society, and will drive the development of the whole industrial chain of China's poly-lactic acid material.
The current domestic existing several sections of patents about polylactic acid tobacco tow, in the patent No.: the technological process control describing polylactic resin raw material spinning polylactic acid tobacco tow in 200610131699.0 " a kind of cigarette filter filaments and preparation method thereof "; A kind of filament bundle for degrading cigarette is described in 201010127357.8 " preparation methods of a kind of filament bundle for degrading cigarette and preparation and filter stick ", its raw material is any one in poly-levorotatory lactide containing crystallization promoter, poly-dextrorotation lactide or both blends, and tow makes filter stick by shredding, gluing.But there are some problems in the patent of two sections, top, in " a kind of cigarette filter filament and preparation method thereof " patent, the percentage by weight of the L-lactic acid unit of polylactic resin used is 3-7%, degree of crystallinity is high, obtained tow cannot be swelling by filter stick for cigarettes plasticizer triacetyl glycerine, therefore, needs to make filter stick hardness reach requirement by higher tow loading, cause PLA tow to go out excellent rate lower, improve the cost of PLA filter stick.In " preparation method of a kind of filament bundle for degrading cigarette and preparation and filter stick " patent, when adopting PLA filter stick formation, Aqueous Adhesives is adopted to be bonded to rod to tow, just there are three problems in this: (1) filter-stick forming device used is the domestic filter-stick forming device applying Aqueous Adhesives, and shaping speed is slow; (2) may some volatile organic compounds be contained in Aqueous Adhesives, there is potential safety hazard; (3) filter stick needs to dry in an oven, adds PLA filter stick manufacturing procedure and cost.
Summary of the invention
One object of the present invention is exactly for above-mentioned Problems existing, a kind of polylactic acid tobacco tow of improvement is provided, this tow surface crystallinity reduces, filter stick for cigarettes plasticizer triacetyl glycerine can be adopted to carry out filter stick formation, under lower tow loading, make filter stick hardness reach more than 87%, there is higher practical value.
The principles of science of institute of the present invention foundation is: be 94-99% by optical purity, the mol ratio of D-lactic acid unit is that (optical purity is 50-82% to the PLA that the PLA of 97%-99.5% and other two kinds of D-lactic acid unit mol ratios are lower, the mol ratio of D-lactic acid unit is the PLA of 75-91% and optical purity is 0-20%, the mol ratio of D-lactic acid unit is the PLA of 40-60%) mix, mol ratio in PLA tow shared by D-lactic acid unit is declined to a great extent, thus cause the lactic acid molecules arrangement regularity on PLA tow surface to decline, the degree of crystallinity on PLA tow surface is caused to decrease, make triacetyl glycerine can play swelling action to tow surface, make this kind of tow can under lower tow loading when filter stick formation, hardness reaches more than 87%, what improve tow goes out excellent rate.This tow has good cost performance and practical value.
The object of the invention is to be achieved through the following technical solutions:
A kind of polylactic acid tobacco tow of modification, mixed through heating and melting by least two or more in PLA-1, PLA-2 and PLA-3 tri-kinds of raw materials, be prepared from through drawing-off, curling, drying and shaping operation, the ratio of three kinds of raw materials is PLA-1: PLA-2: PLA-3 is 0-80%: 0-90%: 0-90%;
Described PLA-1: optical purity is 94-99%, the mol ratio of D-lactic acid unit is 97%-99.5%, and weight average molecular weight is 5-20 ten thousand, and melting range is 160-190 DEG C, the melt index measured under 190 DEG C and 2.16Kg load is at 5-30g/10min, and degree of crystallinity is 35-55%;
Described PLA-2: optical purity is 50-82%, the mol ratio of D-lactic acid unit is 75-91%, and weight average molecular weight is 5-20 ten thousand, and melting range is 100-130 DEG C, the melt index measured under 190 DEG C and 2.16Kg load is at 5-30g/10min, and degree of crystallinity is 2-12%;
Described PLA-3: optical purity is 0-20%, the mol ratio of D-lactic acid unit is 40-60%, and weight average molecular weight is 5-20 ten thousand, and melting range is 80-120 DEG C, the melt index measured under 190 DEG C and 2.16Kg load is at 5-30g/10min, and degree of crystallinity is 0-5%.
It is 15-80: 15-80: 5-50 that the ratio of three kinds of raw materials is preferably PLA-1: PLA-2: PLA-3.
The PLA cigarette silk of modification is prepared from by following concrete grammar:
(1) knot PLA-1 is dried to moisture and is less than 200ppm, baking temperature 60 ~ 120 DEG C, 4 ~ 8 hours drying times, PLA-2 is dried to moisture and is less than 200ppm, baking temperature 50 ~ 60 DEG C, 8 ~ 16 hours drying times, is dried to moisture by PLA-3 simultaneously and is less than 200ppm, baking temperature 50 ~ 60 DEG C, 8 ~ 16 hours drying times;
(2) send into spinning system after above-mentioned three kinds of polylactic resin heating and meltings mixing, in 190 ~ 220 DEG C of meltings, filtration, quantitatively input filament spinning component through measuring pump; Melt is extruded through spinnerets; Spinnerets hole count is 8000 ~ 15000, and spinneret orifice profile is three leaves (Y) type;
(3) industrial air conditioning cooling device is adopted to carry out cooling forming to new spun tow, cooling wind-warm syndrome 10 ~ 20 DEG C; By the finish oil disc rotated, finish (TAKEMOTO OIL & FAT CO., the DELION board finish of LTD company) is coated in tow surface to improve rear road machinability;
(4) be temporary in fiber barrel after reeling to tow under suitable winding speed, winding speed controls at 300 ~ 1500m/min;
(5) in the water-bath of uniform temperature, carry out drawing-off to tow, drawing temperature is 50 ~ 90 DEG C, and draft ratio is 2 ~ 3.5 times;
(6) tow after drawing-off enters crimping machine and carries out curling, and coiling temperature is 85 ~ 95 DEG C;
(7) obtain polylactic acid tobacco tow of the present invention after the tow drying and shaping after curling, drying and shaping temperature at 60 ~ 90 DEG C, drying and shaping time 10 ~ 15min.
A kind of method utilizing above-mentioned polylactic acid tobacco tow to prepare filter stick is as follows: undertaken shaping by PLA tow by filter-stick forming devices such as YL21, KDF-2, KDF-3 or KDF-4, tow is after shredding, apply triacetyl glycerine as filter stick plasticizer, plasticizer addition is the 4-12%wt of tow by weight percentage, namely curable under the filter stick of preparation is put in normal temperature.
In this PLA filter stick, tow bonding is good, and under lower tow loading, hardness is more than 87%, and after tipping cigarette compared with filter stick cigarette fine with vinegar, flue gas conventional ingredient burst size is close, and aesthetic quality increases.Concrete contrast Testing index is as table 1-3:
Filter stick index (24.1mm × 120mm) after the different wire-beam forming of table 1
| Sample | Length mm | Weight g | Circumference mm | Resistance to suction pa | Hardness % |
| The fine filter stick of vinegar | 144 | 0.92 | 24.1 | 3480 | 88 |
| PLA filter stick | 144 | 0.89 | 24.1 | 3494 | 88 |
Cigarette main stream flue gas index under table 2 variety classes filter stick detects table
Cigarette organoleptic attribute under table 3 variety classes filter stick is smoked panel test record sheet
Note: " ↑ " expression slightly improves and promotes; " ↑ ↑ " represent and obviously improve and promote; " ↓ " expression is slightly deteriorated; " ↓ ↓ " represent obviously be deteriorated; "=" represents unchanged.
The present invention compared with prior art, has following beneficial effect:
1. three kinds of PLAs are mixed by a certain percentage, owing to the addition of the high PLA of dextronic acid content in the feed as raw material, left-handed content in raw material is caused to decline, have impact on PLA tow surface crystallization, what PLA tow surface texture was become is loose, unordered, after therefore this tow applies triacetyl glycerine plasticizer when filter stick formation, can make tow bond and swelling, under lower tow loading, hardness reaches more than 87%, has practical value.
2. detect by analysis, the invention provides the made filter stick of PLA tow, compared with the fine filter stick cigarette of vinegar, flue gas conventional ingredient burst size is close, and aesthetic quality increases.
3. in addition, because PLA has biodegradable feature, pollution on the environment can be reduced.
Detailed description of the invention
The present invention is described further below with reference to embodiment, but content of the present invention is not limited to this.
embodiment 1
Select PLA-1 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 80 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-2 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 55 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-3 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 50 DEG C, 8 hours drying times, moisture is less than 200ppm; Dried above-mentioned three kinds of raw materials are pressed 60:20:20 mixing, melting at 210 DEG C, filtration, quantitatively input filament spinning component through measuring pump, and spinnerets hole count is 11400, and spinneret orifice profile is trilobal cross; Adopt the cooling air of 11 DEG C to carry out cooling forming, by finish oil disc, finish is coated in tow surface; To being temporary in fiber barrel after tow winding under the winding speed of 550m/min; In the water-bath of 75 DEG C, carry out drawing-off to tow, draft speed 100 ~ 200m/min, draft ratio is 2.3; Tow after counter extensioin carries out curling on crimping machine, and coiling temperature is 90 DEG C; Tow after curling enters drying and setting machine, drying and shaping temperature at 65 ~ 75 DEG C, drying and shaping time 12min; Finally, obtaining monofilament linear density is 3.4dtex, and tow line density is 3.89ktex, and crispation number is the PLA tow of 23/25mm.This tow is shaping on KDF-2 filter-stick forming device, and triacetyl glycerine applied amount is the 5%wt of tow, and after filter stick solidification, filter stick hardness reaches 88%.
embodiment 2
Select PLA-1 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 90 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-2 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 55 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-3 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 50 DEG C, 8 hours drying times, moisture is less than 200ppm; Dried above-mentioned three kinds of raw materials are pressed 70:20:10 mixing, melting at 215 DEG C, filtration, quantitatively input filament spinning component through measuring pump, and spinnerets hole count is 11400, and spinneret orifice profile is trilobal cross; Adopt the cooling air of 11 DEG C to carry out cooling forming, by finish oil disc, finish is coated in tow surface; To being temporary in fiber barrel after tow winding under the winding speed of 450m/min; In the water-bath of 75 DEG C, carry out drawing-off to tow, draft speed 100 ~ 200m/min, draft ratio is 2.5; Tow after counter extensioin carries out curling on crimping machine, and coiling temperature is 95 DEG C; Tow after curling enters drying and setting machine, drying and shaping temperature at 70 ~ 85 DEG C, drying and shaping time 12min; Finally, obtaining monofilament linear density is 3.7dtex, and tow line density is 4.22ktex, and crispation number is the PLA tow of 23/25mm.This tow is shaping on KDF-2 filter-stick forming device, and triacetyl glycerine applied amount is the 6%wt of tow, and after filter stick solidification, filter stick hardness reaches 88%.
embodiment 3
Select PLA-1 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 100 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-2 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 55 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-3 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 50 DEG C, 8 hours drying times, moisture is less than 200ppm; Dried above-mentioned three kinds of raw materials are pressed 50:30:20 mixing, melting at 205 DEG C, filtration, quantitatively input filament spinning component through measuring pump, and spinnerets hole count is 13200, and spinneret orifice profile is trilobal cross; Adopt the cooling air of 11 DEG C to carry out cooling forming, by finish oil disc, finish is coated in tow surface; To being temporary in fiber barrel after tow winding under the winding speed of 450m/min; In the water-bath of 75 DEG C, carry out drawing-off to tow, draft speed 100 ~ 200m/min, draft ratio is 2.5; Tow after counter extensioin carries out curling on crimping machine, and coiling temperature is 85 DEG C; Tow after curling enters drying and setting machine, drying and shaping temperature at 65 ~ 75 DEG C, drying and shaping time 12min; Finally, obtaining monofilament linear density is 3.4dtex, and tow line density is 4.44ktex, and crispation number is the PLA tow of 21/25mm.This tow is shaping on KDF-3 filter-stick forming device, and triacetyl glycerine applied amount is the 5%wt of tow, and after filter stick solidification, filter stick hardness reaches 88%.
embodiment 4
Select PLA-1 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 90 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-2 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 55 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-3 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 50 DEG C, 8 hours drying times, moisture is less than 200ppm; Dried above-mentioned three kinds of raw materials are pressed 40:40:20 mixing, melting at 210 DEG C, filtration, quantitatively input filament spinning component through measuring pump, and spinnerets hole count is 11400, and spinneret orifice profile is trilobal cross; Adopt the cooling air of 11 DEG C to carry out cooling forming, by finish oil disc, finish is coated in tow surface; To being temporary in fiber barrel after tow winding under the winding speed of 550m/min; In the water-bath of 75 DEG C, carry out drawing-off to tow, draft speed 100 ~ 200m/min, draft ratio is 2.3; Tow after counter extensioin carries out curling on crimping machine, and coiling temperature is 90 DEG C; Tow after curling enters drying and setting machine, drying and shaping temperature at 65 ~ 75 DEG C, drying and shaping time 12min; Finally, obtaining monofilament linear density is 3.4dtex, and tow line density is 3.89ktex, and crispation number is the PLA tow of 23/25mm.This tow is shaping on KDF-3 filter-stick forming device, and triacetyl glycerine applied amount is the 7%wt of tow, and after filter stick solidification, filter stick hardness reaches 88%.
embodiment 5
Select PLA-1 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 90 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-2 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 55 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-3 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 50 DEG C, 8 hours drying times, moisture is less than 200ppm; Dried above-mentioned three kinds of raw materials are pressed 30:50:20 mixing, melting at 215 DEG C, filtration, quantitatively input filament spinning component through measuring pump, and spinnerets hole count is 11400, and spinneret orifice profile is trilobal cross; Adopt the cooling air of 11 DEG C to carry out cooling forming, by finish oil disc, finish is coated in tow surface; To being temporary in fiber barrel after tow winding under the winding speed of 450m/min; In the water-bath of 75 DEG C, carry out drawing-off to tow, draft speed 100 ~ 200m/min, draft ratio is 2.5; Tow after counter extensioin carries out curling on crimping machine, and coiling temperature is 95 DEG C; Tow after curling enters drying and setting machine, drying and shaping temperature at 70 ~ 85 DEG C, drying and shaping time 12min; Finally, obtaining monofilament linear density is 3.7dtex, and tow line density is 4.22ktex, and crispation number is the PLA tow of 23/25mm.This tow is shaping on KDF-4 filter-stick forming device, and triacetyl glycerine applied amount is the 5%wt of tow, and after filter stick solidification, filter stick hardness reaches 88%.
embodiment 6
Select PLA-1 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 70 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-2 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 60 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-3 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 50 DEG C, 8 hours drying times, moisture is less than 200ppm; Dried above-mentioned three kinds of raw materials are pressed 20:50:30 mixing, melting at 210 DEG C, filtration, quantitatively input filament spinning component through measuring pump, and spinnerets hole count is 11400, and spinneret orifice profile is trilobal cross; Adopt the cooling air of 11 DEG C to carry out cooling forming, by finish oil disc, finish is coated in tow surface; To being temporary in fiber barrel after tow winding under the winding speed of 550m/min; In the water-bath of 75 DEG C, carry out drawing-off to tow, draft speed 100 ~ 200m/min, draft ratio is 2.3; Tow after counter extensioin carries out curling on crimping machine, and coiling temperature is 90 DEG C; Tow after curling enters drying and setting machine, drying and shaping temperature at 65 ~ 75 DEG C, drying and shaping time 12min; Finally, obtaining monofilament linear density is 3.4dtex, and tow line density is 3.89ktex, and crispation number is the PLA tow of 23/25mm.This tow is shaping on YL21 filter-stick forming device, and triacetyl glycerine applied amount is the 8%wt of tow, and after filter stick solidification, filter stick hardness reaches 88%.
embodiment 7
Select PLA-2 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 60 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-3 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 50 DEG C, 10 hours drying times, moisture is less than 200ppm; Dried above-mentioned two kinds of raw materials are pressed 80:20 mixing, melting at 210 DEG C, filtration, quantitatively input filament spinning component through measuring pump, and spinnerets hole count is 11400, and spinneret orifice profile is trilobal cross; Adopt the cooling air of 11 DEG C to carry out cooling forming, by finish oil disc, finish is coated in tow surface; To being temporary in fiber barrel after tow winding under the winding speed of 550m/min; In the water-bath of 75 DEG C, carry out drawing-off to tow, draft speed 100 ~ 200m/min, draft ratio is 2.3; Tow after counter extensioin carries out curling on crimping machine, and coiling temperature is 90 DEG C; Tow after curling enters drying and setting machine, drying and shaping temperature at 65 ~ 75 DEG C, drying and shaping time 12min; Finally, obtaining monofilament linear density is 3.4dtex, and tow line density is 3.89ktex, and crispation number is the PLA tow of 23/25mm.This tow is shaping on KDF-2 filter-stick forming device, and triacetyl glycerine applied amount is the 5%wt of tow, and after filter stick solidification, filter stick hardness reaches 87%.
embodiment 8
Select PLA-1 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 70 DEG C, 8 hours drying times, moisture is less than 200ppm; Select PLA-3 polylactic resin, adopt vacuum drum drying machine to be dried, baking temperature 50 DEG C, 10 hours drying times, moisture is less than 200ppm; Dried above-mentioned two kinds of raw materials are pressed 70:30 mixing, melting at 210 DEG C, filtration, quantitatively input filament spinning component through measuring pump, and spinnerets hole count is 11400, and spinneret orifice profile is trilobal cross; Adopt the cooling air of 11 DEG C to carry out cooling forming, by finish oil disc, finish is coated in tow surface; To being temporary in fiber barrel after tow winding under the winding speed of 550m/min; In the water-bath of 75 DEG C, carry out drawing-off to tow, draft speed 100 ~ 200m/min, draft ratio is 2.3; Tow after counter extensioin carries out curling on crimping machine, and coiling temperature is 90 DEG C; Tow after curling enters drying and setting machine, drying and shaping temperature at 65 ~ 75 DEG C, drying and shaping time 12min; Finally, obtaining monofilament linear density is 3.4dtex, and tow line density is 3.89ktex, and crispation number is the PLA tow of 23/25mm.This tow is shaping on KDF-2 filter-stick forming device, and triacetyl glycerine applied amount is the 5%wt of tow, and after filter stick solidification, filter stick hardness reaches 87%.
Claims (3)
1. the polylactic acid tobacco tow of a modification, it is characterized in that: be mixed through heating and melting by PLA-1, PLA-2 and PLA-3 tri-kinds of raw materials, be prepared from through drawing-off, curling, drying and shaping operation, the ratio of three kinds of raw materials is PLA-1: PLA-2: PLA-3 is 15-80: 15-80: 5-50;
Described PLA-1: optical purity is 94-99%, the mol ratio of D-lactic acid unit is 97%-99.5%, and weight average molecular weight is 5-20 ten thousand, and melting range is 160-190 DEG C, the melt index measured under 190 DEG C and 2.16Kg load is at 5-30g/10min, and degree of crystallinity is 35-55%;
Described PLA-2: optical purity is 50-82%, the mol ratio of D-lactic acid unit is 75-91%, and weight average molecular weight is 5-20 ten thousand, and melting range is 100-130 DEG C, the melt index measured under 190 DEG C and 2.16Kg load is at 5-30g/10min, and degree of crystallinity is 2-12%;
Described PLA-3: optical purity is 0-20%, the mol ratio of D-lactic acid unit is 40-60%, and weight average molecular weight is 5-20 ten thousand, and melting range is 80-120 DEG C, the melt index measured under 190 DEG C and 2.16Kg load is at 5-30g/10min, and degree of crystallinity is 0-5%.
2. the polylactic acid tobacco tow of modification according to claim 1, is characterized in that: the PLA cigarette silk of modification is prepared from by following concrete grammar:
(1) PLA-1 is dried to moisture and is less than 200ppm, baking temperature 60 ~ 120 DEG C, 4 ~ 8 hours drying times, PLA-2 is dried to moisture and is less than 200ppm, baking temperature 50 ~ 60 DEG C, 8 ~ 16 hours drying times, is dried to moisture by PLA-3 simultaneously and is less than 200ppm, baking temperature 50 ~ 60 DEG C, 8 ~ 16 hours drying times;
(2) send into spinning system after above-mentioned three kinds of polylactic resin heating and meltings mixing, in 190 ~ 220 DEG C of meltings, filtration, quantitatively input filament spinning component through measuring pump; Melt is extruded through spinnerets; Spinnerets hole count is 8000 ~ 15000, and spinneret orifice profile is trilobal cross;
(3) industrial air conditioning cooling device is adopted to carry out cooling forming to new spun tow, cooling wind-warm syndrome 10 ~ 20 DEG C; By the finish oil disc rotated, finish is coated in tow surface to improve rear road machinability;
(4) be temporary in fiber barrel after reeling to tow under suitable winding speed, winding speed controls at 300 ~ 1500m/min;
(5) in the water-bath of uniform temperature, carry out drawing-off to tow, drawing temperature is 50 ~ 90 DEG C, and draft ratio is 2 ~ 3.5 times;
(6) tow after drawing-off enters crimping machine and carries out curling, and coiling temperature is 85 ~ 95 DEG C;
(7) obtain described polylactic acid tobacco tow after the tow drying and shaping after curling, drying and shaping temperature at 60 ~ 90 DEG C, drying and shaping time 10 ~ 15min.
3. the method utilizing polylactic acid tobacco tow described in claim 1 to prepare filter stick, it is characterized in that: PLA tow is undertaken shaping by YL21, KDF-2, KDF-3 or KDF-4 filter-stick forming device, tow is after shredding, apply triacetyl glycerine as filter stick plasticizer, plasticizer addition is the 4-12%wt of tow by weight percentage, namely curable under the filter stick of preparation is put in normal temperature.
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| WO2015164447A2 (en) * | 2014-04-22 | 2015-10-29 | Fiber Innovation Technology, Inc. | Fibers comprising an aliphatic polyester blend, and yarns, tows, and fabrics formed therefrom |
| CN105755575B (en) * | 2016-03-02 | 2018-08-07 | 云南瑞升烟草技术（集团）有限公司 | A kind of preparation method of cigarette colored polylactic acid tow and filter stick |
| CN106906529A (en) * | 2017-04-08 | 2017-06-30 | 河南省龙都生物科技有限公司 | A kind of leaf profiled filament production method of PLA three |
| CN109123768B (en) * | 2017-06-19 | 2021-03-23 | 贵州中烟工业有限责任公司 | Method for controlling stability of tar release amount of cigarette |
| CN108703412A (en) * | 2018-06-03 | 2018-10-26 | 上海同巽环保科技有限公司 | A kind of filter stick of safety and environmental protection and preparation method thereof |
| CN110326815A (en) * | 2019-07-18 | 2019-10-15 | 深圳市华远新材料有限公司 | A kind of cigarette filter tip materials and preparation method thereof of low resistance to suction and high filtration |
| CN110477449A (en) * | 2019-08-28 | 2019-11-22 | 深圳市智叶科技有限公司 | A kind of non-woven cotton filter tip and preparation method thereof |
| CN110477450B (en) * | 2019-08-28 | 2023-07-11 | 深圳市智叶科技有限公司 | Filter tip for electronic cigarette and preparation method thereof |
| CN115486556A (en) * | 2022-09-23 | 2022-12-20 | 云南中烟工业有限责任公司 | Preparation of anti-cutting polylactic acid fiber filter stick |
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Address after: 450001 No. 2 Fengyang Street, Zhengzhou High-tech Zone, Henan Province Co-patentee after: Jiangsu Heji Tobacco Material Co., Ltd. Patentee after: Zhengzhou Tobacco Research Institute of CNTC Co-patentee after: Hongta Tobacco (Group) Co., Ltd. Address before: 450001 No. 2 Fengyang Street, Zhengzhou High-tech Zone, Henan Province Co-patentee before: Jiangsu Tianshengda Group Wuxi New Synthetic Fibre Co., Ltd. Patentee before: Zhengzhou Tobacco Research Institute of CNTC Co-patentee before: Hongta Tobacco (Group) Co., Ltd. |
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