CN113455701A - Cigarette tow and preparation method thereof - Google Patents
Cigarette tow and preparation method thereof Download PDFInfo
- Publication number
- CN113455701A CN113455701A CN202110878805.6A CN202110878805A CN113455701A CN 113455701 A CN113455701 A CN 113455701A CN 202110878805 A CN202110878805 A CN 202110878805A CN 113455701 A CN113455701 A CN 113455701A
- Authority
- CN
- China
- Prior art keywords
- tows
- tow
- polylactic acid
- polypropylene
- resin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 96
- 238000002360 preparation method Methods 0.000 title description 11
- 229920000747 poly(lactic acid) Polymers 0.000 claims abstract description 104
- 239000004626 polylactic acid Substances 0.000 claims abstract description 104
- 229920005989 resin Polymers 0.000 claims abstract description 100
- 239000011347 resin Substances 0.000 claims abstract description 100
- 239000004743 Polypropylene Substances 0.000 claims abstract description 99
- -1 polypropylene Polymers 0.000 claims abstract description 99
- 229920001155 polypropylene Polymers 0.000 claims abstract description 99
- 239000002994 raw material Substances 0.000 claims abstract description 35
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 16
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 16
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 7
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 7
- 229920002689 polyvinyl acetate Polymers 0.000 claims abstract description 7
- 239000011118 polyvinyl acetate Substances 0.000 claims abstract description 7
- 229920006225 ethylene-methyl acrylate Polymers 0.000 claims abstract description 6
- 238000009987 spinning Methods 0.000 claims description 43
- 238000009998 heat setting Methods 0.000 claims description 28
- 238000002156 mixing Methods 0.000 claims description 18
- 239000011265 semifinished product Substances 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 17
- 241000208125 Nicotiana Species 0.000 claims description 7
- 235000002637 Nicotiana tabacum Nutrition 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000003963 antioxidant agent Substances 0.000 claims description 6
- 230000003078 antioxidant effect Effects 0.000 claims description 6
- 239000004014 plasticizer Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 abstract description 7
- 238000010008 shearing Methods 0.000 abstract description 5
- 238000002788 crimping Methods 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000001035 drying Methods 0.000 description 10
- OKOBUGCCXMIKDM-UHFFFAOYSA-N Irganox 1098 Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)NCCCCCCNC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 OKOBUGCCXMIKDM-UHFFFAOYSA-N 0.000 description 9
- 239000002202 Polyethylene glycol Substances 0.000 description 9
- 229920001223 polyethylene glycol Polymers 0.000 description 9
- 238000002036 drum drying Methods 0.000 description 8
- SNICXCGAKADSCV-JTQLQIEISA-N (-)-Nicotine Chemical compound CN1CCC[C@H]1C1=CC=CN=C1 SNICXCGAKADSCV-JTQLQIEISA-N 0.000 description 6
- 238000007664 blowing Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 229960002715 nicotine Drugs 0.000 description 6
- SNICXCGAKADSCV-UHFFFAOYSA-N nicotine Natural products CN1CCCC1C1=CC=CN=C1 SNICXCGAKADSCV-UHFFFAOYSA-N 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000010981 drying operation Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 239000008041 oiling agent Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 125000005456 glyceride group Chemical group 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920005633 polypropylene homopolymer resin Polymers 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000012942 water-based acrylic adhesive Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- 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
- A24D3/0229—Filter rod forming processes
- A24D3/0237—Filter rod forming processes by extrusion
-
- 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
- A24D3/025—Final operations, i.e. after the filter rod forming process
-
- 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
- A24D3/025—Final operations, i.e. after the filter rod forming process
- A24D3/0254—Cutting means
-
- 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
- A24D3/027—Multiple line manufacturing devices
-
- 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
- A24D3/04—Tobacco smoke filters characterised by their shape or structure
-
- 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
- A24D3/062—Use of materials for tobacco smoke filters characterised by structural features
- A24D3/063—Use of materials for tobacco smoke filters characterised by structural features of the fibers
-
- 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
- A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Artificial Filaments (AREA)
Abstract
The invention provides a cigarette tow, which comprises a polylactic acid tow and a polypropylene tow; the mass ratio of the polylactic acid tows to the polypropylene tows is (4-1): 1; the polylactic acid tow is prepared from the following raw materials in percentage by mass: 50-99.5% of polylactic resin and 0.5-50% of heat stable resin; the thermally stable resin includes at least one of an acrylic resin, an ethylene-methyl acrylate copolymer, an ethylene-vinyl acetate copolymer, and polyvinyl acetate. According to the invention, the heat-stable resin is added into the polylactic acid tows, the excellent heat stability of the heat-stable resin is utilized to prevent the polylactic acid tows for the cigarette from being softened under the shearing action of pressure, friction and the like of a filter rod forming device to generate roller sticking and cutter sticking phenomena, the excellent temperature resistance of the polypropylene tows is utilized to play a role of a heat-resistant component by controlling the mass ratio of the polylactic acid tows and the polypropylene tows in the cigarette tows, and the filtering performance of the polylactic acid tows is improved.
Description
Technical Field
The invention relates to the technical field of cigarette tows, in particular to a cigarette tow and a preparation method thereof.
Background
The cigarette tow is an important material for producing cigarette filter tip rods, and has the advantages of good elasticity, no toxicity, no odor, high thermal stability, small smoke resistance, obvious filter effect, capability of selectively adsorbing harmful ingredients in cigarettes and retention of certain nicotine without losing the taste of the cigarettes.
At present, the polylactic acid is mainly used as a raw material in China to produce cigarette tows, the molecular surface of the polylactic acid contains rich polar groups, the polylactic acid has strong affinity to polar substances, and can be chemically reacted with tar components and low molecular substances, reactants are firmly left on the surface of fibers, and meanwhile, the surface of the polylactic acid tows has micropores and roughness, and has double effects of physical adsorption and chemical adsorption in the adsorption process of smoke. But the polylactic acid has poor temperature resistance, and can be softened under the shearing action of pressure, friction and the like of a threaded roller, a rubber roller and a cutting tool bit which rotate at high speed of the opening gluing machine and the filter stick forming machine, so that the phenomena of roller sticking and tool sticking are generated, abnormal parking is caused, and the stick forming speed is reduced; and when the cigarette is stored and transported in summer, the polylactic acid fiber can be subjected to secondary shrinkage due to higher temperature, so that the filter tip is shrunk inwards, and the filtering effect of the cigarette tows is reduced. Therefore, it is an urgent problem to provide a polylactic acid tow for cigarette having excellent thermal stability.
Disclosure of Invention
The invention aims to provide a cigarette tow and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a cigarette tow, which comprises a polylactic acid tow and a polypropylene tow;
the mass ratio of the polylactic acid tows to the polypropylene tows is (4-1): 1;
the polylactic acid tow is prepared from the following raw materials in percentage by mass: 50-99.5% of polylactic resin and 0.5-50% of heat stable resin;
the thermally stable resin includes at least one of an acrylic resin, an ethylene-methyl acrylate copolymer, an ethylene-vinyl acetate copolymer, and polyvinyl acetate.
Preferably, the polylactic acid tows and the polypropylene tows are distributed in the cigarette tows at intervals.
Preferably, the mass ratio of the polylactic acid tows to the polypropylene tows is (2-3): 1.
preferably, the polylactic acid tow is prepared from the following raw materials in percentage by mass: 55-98% of polylactic resin and 2-45% of heat-stable resin.
Preferably, the total linear density of the cigarette tows is 0.5-6 ktex, the monofilament linear density of the polylactic acid tows is 2-6 dtex, and the monofilament linear density of the polypropylene tows is 2-6 dtex.
Preferably, the polypropylene tow is prepared from the following raw materials in percentage by mass: 0.1-0.3% of antioxidant, 0.1-0.5% of plasticizer and 99.2-99.8% of polypropylene resin.
The invention also provides a preparation method of the cigarette tows in the technical scheme, which comprises the following steps:
(1) mixing polylactic resin and thermostable resin, and then carrying out melt plasticization to obtain a first melt;
(2) mixing raw materials of polypropylene tows, and then carrying out melting plasticization to obtain a second melt;
(3) respectively conveying the first melt obtained in the step (1) and the second melt obtained in the step (2) to spinneret plate holes at intervals in a two-component spinning assembly for spinning to obtain a semi-finished product consisting of polylactic acid tows and polypropylene tows;
(4) carrying out post-treatment on the semi-finished product obtained in the step (3) to obtain cigarette tows;
the step (1) and the step (2) are not in sequence.
Preferably, the post-treatment in the step (4) includes cooling, surface finish treatment, drawing, tension heat setting, curling and relaxation heat setting, which are sequentially performed.
Preferably, the drafting multiple is 1-5 times, the drafting temperature is 55-100 ℃, and the drafting speed is 100-2000 m/min.
Preferably, the temperature of the tension heat setting is 50-120 ℃.
The invention provides a cigarette tow, which comprises a polylactic acid tow and a polypropylene tow; the mass ratio of the polylactic acid tows to the polypropylene tows is (4-1): 1; the polylactic acid tow is prepared from the following raw materials in percentage by mass: 50-99.5% of polylactic resin and 0.5-50% of heat stable resin; the thermally stable resin includes at least one of an acrylic resin, an ethylene-methyl acrylate copolymer, an ethylene-vinyl acetate copolymer, and polyvinyl acetate. According to the invention, the heat-stable resin is added into the polylactic acid tows, the excellent heat stability of the heat-stable resin is utilized to prevent the polylactic acid cigarette tows from softening under the shearing action of pressure, friction and the like of a filter rod forming device to generate roller sticking and cutter sticking phenomena, and the excellent temperature resistance of the polypropylene tows can be utilized to play a role of a heat-resistant component by controlling the mass ratio of the polylactic acid tows and the polypropylene tows in the cigarette tows, so that the heat stability of the polylactic acid tows is further improved, and the filtering performance of the cigarette tows is further improved. Experimental results show that the carbon monoxide content of the cigarette filter stick prepared by the cigarette tows is not lower than 7.8 mg/piece, the total particle phase content is not lower than 12 mg/piece, the nicotine content is not lower than 1.4 mg/piece, the tar content is not lower than 12 mg/piece, and the water content is not lower than 1.4 mg/piece.
Detailed Description
The invention provides a cigarette tow, which comprises a polylactic acid tow and a polypropylene tow;
the mass ratio of the polylactic acid tows to the polypropylene tows is (4-1): 1;
the polylactic acid tow is prepared from the following raw materials in percentage by mass: 50-99.5% of polylactic resin and 0.5-50% of heat stable resin;
the thermally stable resin includes at least one of an acrylic resin, an ethylene-methyl acrylate copolymer, an ethylene-vinyl acetate copolymer, and polyvinyl acetate.
The cigarette tows provided by the invention comprise polylactic acid tows and polypropylene tows.
In the invention, the mass ratio of the polylactic acid tows to the polypropylene tows is (4-1): 1, preferably (2-3): 1, more preferably 2.5: 1. according to the invention, by controlling the mass ratio of the polylactic acid tows to the polypropylene tows in the cigarette tows, the excellent temperature resistance of the polypropylene tows can be utilized to play a role of a heat-resistant component, so that the thermal stability of the polylactic acid tows is further improved, and an excellent filtering effect is achieved.
In the invention, the polylactic acid tows and the polypropylene tows are preferably distributed in the cigarette tows at intervals.
In the invention, the raw material of the polylactic acid tow comprises 50-99.5% of polylactic acid resin, preferably 55-98%, more preferably 60-95%, and more preferably 70-80%. The polylactic acid resin is matrix resin of polylactic acid tows.
In the present invention, the polylactic acid resin is preferably an L-polylactic acid resin and/or a D-polylactic acid resin; when the polylactic acid resin is L-polylactic acid resin and D-polylactic acid resin, the mass ratio of the L-polylactic acid resin to the D-polylactic acid resin is preferably (1-5): 1, more preferably (2-4): 1. the source of the polylactic acid resin is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. The invention can further improve the thermal stability of the polylactic acid tows by limiting the mass ratio of the L-polylactic acid resin to the D-polylactic acid resin.
In the invention, the weight average molecular weight of the polylactic acid resin is preferably 4-25 ten thousand; the molecular weight distribution index of the polylactic acid resin is preferably less than or equal to 6.5; the melting temperature of the polylactic resin is preferably 145-178 ℃; the melt index of the polylactic resin is preferably 1.5-35 g/10 min.
In the invention, the raw material of the polylactic acid tow also comprises 0.5-50% of heat-stable resin, preferably 2-45%, more preferably 5-39%, and more preferably 20-30%. In the present invention, the thermally stable resin includes at least one of an acrylic resin, an ethylene-methyl acrylate copolymer, an ethylene-vinyl acetate copolymer, and polyvinyl acetate. The source of the heat-stable resin is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. According to the invention, the thermal stability of the polylactic acid tows can be improved by introducing the thermal stable resin, and the phenomena of roller sticking and cutter sticking caused by softening of the tows for the polylactic acid cigarette under the shearing action of pressure, friction and the like of the filter rod forming equipment are avoided.
In the invention, the polypropylene tow is preferably prepared from the following raw materials in percentage by mass: 0.1-0.3% of antioxidant, 0.1-0.5% of plasticizer and 99.2-99.8% of polypropylene resin.
In the invention, the raw material of the polypropylene tow preferably comprises 0.1-0.3% of antioxidant, and more preferably 0.2%. In the present invention, the antioxidant preferably includes antioxidant 1098 and/or antioxidant 264. The source of the antioxidant is not particularly limited in the present invention, and a commercially available product known to those skilled in the art may be used.
In the invention, the raw material of the polypropylene tow preferably further comprises 0.1-0.5% of a plasticizer, and more preferably 0.2-0.4%. In the present invention, the plasticizer preferably includes at least one of polyethylene glycol, citrate ester and glyceride. The source of the plasticizer is not particularly limited in the present invention, and a commercially available product known to those skilled in the art may be used.
In the invention, the raw material of the polypropylene tows preferably further comprises 99.2-99.8% of polypropylene resin, and more preferably 99.3-99.6%. In the present invention, the polypropylene resin preferably includes a homo-polypropylene resin and/or a co-polypropylene resin; the weight average molecular weight of the polypropylene resin is preferably 10-35 ten thousand; the molecular weight distribution index of the polypropylene resin is preferably 6.5 or less; the melting temperature of the polypropylene resin is preferably 140-280 ℃; the melt index of the polypropylene resin is preferably 0.2-45 g/10 min. The source of the polypropylene resin is not particularly limited in the present invention, and commercially available products known to those skilled in the art may be used. The polypropylene resin is matrix resin of polypropylene tows, and can improve the thermal stability of the cigarette tows.
In the invention, the total line density of the cigarette tows is preferably 0.5-6 ktex, and more preferably 2-4 ktex. In the invention, the filament linear density of the polylactic acid filament bundle is preferably 2-6 dtex, and more preferably 3-5 dtex; the number of crimps of the polylactic acid tows is preferably 15-30/25 mm. In the invention, the monofilament linear density of the polypropylene tows is preferably 2-6 dtex, and more preferably 3-5 dtex; the number of crimps of the polypropylene tows is preferably 15-30/25 mm.
According to the invention, the heat-stable resin is added into the polylactic acid tows, the excellent heat stability of the heat-stable resin is utilized to prevent the polylactic acid cigarette tows from softening under the shearing action of pressure, friction and the like of a filter rod forming device to generate roller sticking and cutter sticking phenomena, and the excellent temperature resistance of the polypropylene tows can be utilized to play a role of a heat-resistant component by controlling the mass ratio of the polylactic acid tows and the polypropylene tows in the cigarette tows, so that the heat stability of the polylactic acid tows is improved, and the excellent filtering effect is realized.
The invention also provides a preparation method of the cigarette tows in the technical scheme, which comprises the following steps:
(1) mixing polylactic resin and thermostable resin, and then carrying out melt plasticization to obtain a first melt;
(2) mixing raw materials for polypropylene tows, and then carrying out melting plasticization to obtain a second melt;
(3) respectively conveying the first melt obtained in the step (1) and the second melt obtained in the step (2) to spinneret plate holes at intervals in a two-component spinning assembly for spinning to obtain a semi-finished product consisting of polylactic acid tows and polypropylene tows;
(4) carrying out post-treatment on the semi-finished product obtained in the step (3) to obtain cigarette tows;
the step (1) and the step (2) are not in sequence.
The polylactic acid resin and the heat stable resin are mixed and then melted and plasticized to obtain a first melt.
In the present invention, the polylactic acid resin and the heat-stable resin are preferably dried before being mixed. The drying operation is not particularly limited in the present invention, and a raw material drying operation known to those skilled in the art may be employed. The present invention can remove moisture in the raw material by drying the polylactic acid resin and the heat-stable resin before mixing.
The operation of mixing the polylactic acid resin and the heat-stable resin is not particularly limited in the invention, and the technical scheme for preparing the mixed material, which is well known to those skilled in the art, can be adopted.
In the present invention, the melt plasticization is preferably performed in a single screw extruder; the temperature of the melting and plasticizing is preferably 160-265 ℃, and more preferably 180-250 ℃.
The raw materials used by the polypropylene tows are mixed and then melted and plasticized to obtain a second melt.
In the present invention, the polypropylene resin in the raw materials for polypropylene tow is preferably dried before mixing the raw materials. The drying operation is not particularly limited in the present invention, and a raw material drying operation known to those skilled in the art may be employed. The invention can remove the water in the raw material by drying the polypropylene resin.
The operation of mixing the raw materials for the polypropylene tow is not particularly limited in the present invention, and the technical scheme for preparing the mixed material, which is well known to those skilled in the art, can be adopted.
In the present invention, the melt plasticization is preferably performed in a single screw extruder; the temperature of the melting and plasticizing is preferably 160-265 ℃, and more preferably 180-250 ℃.
After the first melt and the second melt are obtained, the first melt and the second melt are respectively conveyed into spinneret plate holes at intervals in a two-component spinning assembly for spinning to obtain a semi-finished product consisting of polylactic acid tows and polypropylene tows.
According to the invention, the first melt and the second melt preferably enter the spinning box through the filter respectively, and then are conveyed to spinneret plate holes at intervals in the two-component spinning assembly through a metering pump in the spinning box for spinning, so as to obtain a semi-finished product consisting of polylactic acid tows and polypropylene tows.
The source of the above-mentioned apparatus is not particularly limited in the present invention, and an apparatus known to those skilled in the art may be used.
In the invention, the temperature of the filter is preferably 230-275 ℃; the number of the filter meshes of the filter is preferably 150-500 meshes. The invention can remove impurities and unmelted high molecular substances in the first melt and the second melt by filtering before spinning.
In the invention, the rotating speed of the metering pump is preferably 12-30 revolutions/min; the spinneret plate holes are preferably at least one of C-shaped, Y-shaped, X-shaped and hollow; the aperture of the spinneret plate hole is preferably 0.2-0.5 mm; the aspect ratio of the spinneret holes is preferably (1.5-4): 1.
in the invention, the spinning temperature is preferably 200-300 ℃, and more preferably 250-275 ℃; the spinning speed is preferably 50-1000 m/min.
After a semi-finished product consisting of the polylactic acid tows and the polypropylene tows is obtained, the semi-finished product is subjected to post-treatment to obtain the cigarette tows.
In the present invention, the post-treatment preferably includes cooling, surface finish treatment, drawing, tension heat setting, curl and relaxation heat setting, which are performed in this order.
In the invention, the cooling mode is preferably cooling air blowing; the cooling air blow is preferably at least one of a side blow, an outer ring blow and an inner ring blow; the temperature of the cooling air is preferably 5-25 ℃; the air pressure of the cooling air blowing is preferably 200-800 Pa, and more preferably 300-500 Pa; the wind speed of the cooling wind is preferably 0.2-0.6 m/s, and more preferably 0.3-0.4 m/s.
In the present invention, the surface finish treatment is preferably performed by tanker coating and oil nozzle injection. The surface finish treatment of the present invention is not particularly limited, and finishes known to those skilled in the art may be used. The invention adopts surface oil agent treatment to increase the bundling property of the fiber, reduce the generation of filoplume and hairline, and increase the strength of the filament bundle, thereby improving the weaving efficiency and quality.
In the invention, the drafting multiple is preferably 1-5 times, and more preferably 2-4 times; the drafting temperature is preferably 55-100 ℃; the speed of the drafting is preferably 100-2000 m/min. The invention can improve the orientation degree of molecular chains in the tows by adopting drafting, thereby improving the strength of the tows and achieving the purpose of elongation.
In the invention, the temperature of the tension heat setting is preferably 50-120 ℃, and more preferably 70-100 ℃. The invention can reduce the internal stress generated during the drawing of the filament bundle and reduce the thermal shrinkage rate by carrying out tension heat setting after drawing.
In the invention, the curling temperature is preferably 40-100 ℃, and more preferably 60-80 ℃; the diameter of the curling wheel used for curling is preferably 80-150 mm; the width of the crimping wheel is preferably 30-80 mm. The invention adopts the curling to increase the cohesive force between the tows.
In the invention, the temperature of the relaxation heat setting is preferably 70-110 ℃, and more preferably 80-100 ℃. The invention can further reduce the internal stress generated by the tows during drafting by adopting relaxation heat setting, so that macromolecules are relaxed to a certain degree, the crystallinity of the tows is improved, the heat shrinkage rate is reduced, and the dimensional stability of the tows is improved.
The preparation method provided by the invention is simple in process and suitable for industrial production.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The cigarette tows consist of polylactic acid tows and polypropylene tows;
wherein the mass ratio of the polylactic acid tows to the polypropylene tows is 2: 1;
the polylactic acid tows and the polypropylene tows are distributed in the cigarette tows at intervals;
the polylactic acid tow is prepared from the following raw materials in percentage by mass: 99.5% of polylactic resin and 0.5% of acrylic resin;
the polypropylene tow is prepared from the following raw materials in percentage by mass: 0.1% of antioxidant 1098, 0.1% of polyethylene glycol and 99.8% of polypropylene resin;
the total line density of the tobacco tows is 1.7 ktex; the filament linear density of the polylactic acid filament bundle is 2.8dtex, the number of crimps is 25/25 mm, and the dry heat shrinkage rate is 3.0 percent; the filament linear density of the polypropylene filament bundle is 3.6dtex, the crimp number is 20/25 mm, and the dry heat shrinkage rate is 3.2%;
the preparation method of the cigarette tows comprises the following steps:
(1) respectively drying LX130U type polylactic resin and acrylic resin produced by Corbion, Holland by using a drum drying device to reduce the water content to below 200ppm, mixing the dried polylactic resin and acrylic resin, and performing melt plasticization at 250 ℃ by using a single-screw extruder to obtain a first melt;
(2) drying 1101S type polypropylene resin produced by Ningxia Huaning coal group Co., Ltd by using a drum drying device to reduce the water content to below 200ppm, mixing the dried polypropylene resin with an antioxidant 1098 and polyethylene glycol, and performing melt plasticizing at 200 ℃ by using a single screw extruder to obtain a second melt;
(3) enabling the first melt obtained in the step (1) and the second melt obtained in the step (2) to enter a spinning box through a filter for spinning, quantitatively conveying the first melt and the second melt to an isolation cavity of a distribution plate in a two-component spinning assembly through a metering pump in the spinning box, and respectively conveying the first melt and the second melt to spaced C-shaped spinneret plate holes of a spinneret plate for spinning to obtain a semi-finished product consisting of polylactic acid tows and polypropylene tows;
wherein the temperature of the filter is 270 ℃, and the mesh number of the filter screen is 300 meshes; the rotating speed of a metering pump for conveying the first melt is 18 revolutions per minute, and the rotating speed of a metering pump for conveying the second melt is 26 revolutions per minute; the number of holes of the spinneret plate is 3000, the hole diameter is 0.2mm, and the length-diameter ratio is 3: 1; the spinning speed is 350m/min, and the spinning temperature is 265 ℃;
(4) cooling the semi-finished product obtained in the step (3) by adopting a side-blowing mode, and controlling the cooling air temperature to be 5 ℃, the air pressure to be 200Pa and the air speed to be 0.2 m/s; then, carrying out surface oiling agent treatment by adopting a mode of oil wheel coating oiling and oil nozzle spraying oiling; then, sequentially carrying out drawing and tension heat setting, wherein the drawing speed is 700m/min, the drawing multiple is 4 times, the drawing temperature is 75 ℃, and the tension heat setting temperature is 85 ℃, so as to obtain heat-set tows;
(5) introducing the heat-set tows obtained in the step (4) into a crimping machine for crimping, controlling the crimping temperature to be 50 ℃, the diameter of a crimping wheel to be 100mm, and the width of the crimping wheel to be 40mm, so as to obtain crimped tows;
(6) and (5) performing relaxation heat setting on the crimped tows obtained in the step (5) in an infrared radiation mode, and controlling the temperature of the relaxation heat setting to be 75 ℃ to obtain the cigarette tows.
Example 2
The cigarette tows consist of polylactic acid tows and polypropylene tows;
wherein the mass ratio of the polylactic acid tows to the polypropylene tows is 1: 1;
the polylactic acid tows and the polypropylene tows are distributed in the cigarette tows at intervals;
the polylactic acid tow is prepared from the following raw materials in percentage by mass: 95% of polylactic resin and 5% of acrylic resin;
the polypropylene tow is prepared from the following raw materials in percentage by mass: 0.1% of antioxidant 1098, 0.1% of polyethylene glycol and 99.8% of polypropylene resin;
the total line density of the cigarette tows is 2.5 ktex; the filament linear density of the polylactic acid filament bundle is 3.0dtex, the number of crimps is 22/25 mm, and the dry heat shrinkage rate is 2.5 percent; the filament linear density of the polypropylene filament bundle is 3.6dtex, the crimp number is 19/25 mm, and the dry heat shrinkage rate is 3.1%;
the preparation method of the cigarette tows comprises the following steps:
(1) respectively drying LX130U type polylactic resin and acrylic resin produced by Corbion, Holland by using a drum drying device to reduce the water content to below 200ppm, mixing the dried polylactic resin and acrylic resin, and performing melt plasticization in a single-screw extruder at 250 ℃ to obtain a first melt;
(2) drying 1101S type polypropylene resin produced by Ningxia Huaning coal group Co., Ltd by using a drum drying device to reduce the water content to below 200ppm, mixing the dried polypropylene resin with an antioxidant 1098 and polyethylene glycol, and performing melt plasticizing at 200 ℃ by using a single screw extruder to obtain a second melt;
(3) enabling the first melt obtained in the step (1) and the second melt obtained in the step (2) to enter a spinning box through a filter for spinning, quantitatively conveying the first melt and the second melt to an isolation cavity of a distribution plate in a two-component spinning assembly through a metering pump in the spinning box, and respectively conveying the first melt and the second melt to spaced C-shaped spinneret plate holes of a spinneret plate for spinning to obtain a semi-finished product consisting of polylactic acid tows and polypropylene tows;
wherein the temperature of the filter is 270 ℃, and the mesh number of the filter screen is 300 meshes; the rotating speed of a metering pump for conveying the first melt is 16 revolutions per minute, and the rotating speed of a metering pump for conveying the second melt is 24 revolutions per minute; the number of holes of the spinneret plate is 3000, the hole diameter is 0.2mm, and the length-diameter ratio is 3: 1; the spinning speed is 350m/min, and the spinning temperature is 265 ℃;
(4) cooling the semi-finished product obtained in the step (3) by adopting a side-blowing mode, and controlling the cooling air temperature to be 5 ℃, the air pressure to be 200Pa and the air speed to be 0.2 m/s; then, carrying out surface oiling agent treatment by adopting a mode of oil wheel coating oiling and oil nozzle spraying oiling; then, sequentially carrying out drawing and tension heat setting, wherein the drawing speed is 700m/min, the drawing multiple is 4 times, the drawing temperature is 75 ℃, and the tension heat setting temperature is 85 ℃, so as to obtain heat-set tows;
(5) introducing the heat-set tows obtained in the step (4) into a crimping machine for crimping, controlling the crimping temperature to be 50 ℃, the diameter of a crimping wheel to be 100mm, and the width of the crimping wheel to be 40mm, so as to obtain crimped tows;
(6) and (5) performing relaxation heat setting on the crimped tows obtained in the step (5) in an infrared radiation mode, and controlling the temperature of the relaxation heat setting to be 75 ℃ to obtain the cigarette tows.
Example 3
The cigarette tows consist of polylactic acid tows and polypropylene tows;
wherein the mass ratio of the polylactic acid tows to the polypropylene tows is 3: 1;
the polylactic acid tows and the polypropylene tows are distributed in the cigarette tows at intervals;
the polylactic acid tow is prepared from the following raw materials in percentage by mass: 85% of polylactic resin and 15% of ethylene-vinyl acetate copolymer;
the polypropylene tow is prepared from the following raw materials in percentage by mass: 0.1% of antioxidant 1098, 0.1% of polyethylene glycol and 99.8% of polypropylene resin;
the bus density of the cigarette tows is 3.0 ktex; the filament linear density of the polylactic acid filament bundle is 2.5dtex, the number of crimps is 18/25 mm, and the dry heat shrinkage rate is 2.0 percent; the filament linear density of the polypropylene filament bundle is 3.6dtex, the crimp number is 20/25 mm, and the dry heat shrinkage rate is 3.0 percent;
the preparation method of the cigarette tows comprises the following steps:
(1) respectively drying LX130U type polylactic resin and acrylic resin produced by Corbion, Holland by using a drum drying device to reduce the water content to below 200ppm, mixing the dried polylactic resin and acrylic resin, and performing melt plasticization in a single-screw extruder at 250 ℃ to obtain a first melt;
(2) drying 1101S type polypropylene resin produced by Ningxia Huaning coal group Co., Ltd by using a drum drying device to reduce the water content to below 200ppm, mixing the dried polypropylene resin with an antioxidant 1098 and polyethylene glycol, and performing melt plasticizing at 200 ℃ by using a single screw extruder to obtain a second melt;
(3) enabling the first melt obtained in the step (1) and the second melt obtained in the step (2) to enter a spinning box through a filter for spinning, quantitatively conveying the first melt and the second melt to an isolation cavity of a distribution plate in a two-component spinning assembly through a metering pump in the spinning box, and respectively conveying the first melt and the second melt to spaced C-shaped spinneret plate holes of a spinneret plate for spinning to obtain a semi-finished product consisting of polylactic acid tows and polypropylene tows;
wherein the temperature of the filter is 270 ℃, and the mesh number of the filter screen is 300 meshes; the rotating speed of a metering pump for conveying the first melt is 16 revolutions per minute, and the rotating speed of a metering pump for conveying the second melt is 24 revolutions per minute; the number of holes of the spinneret plate is 3000, the hole diameter is 0.2mm, and the length-diameter ratio is 3: 1; the spinning speed is 350m/min, and the spinning temperature is 255 ℃;
(4) cooling the semi-finished product obtained in the step (3) by adopting a side-blowing mode, and controlling the cooling air temperature to be 5 ℃, the air pressure to be 200Pa and the air speed to be 0.2 m/s; then, carrying out surface oiling agent treatment by adopting a mode of oil wheel coating oiling and oil nozzle spraying oiling; then, sequentially carrying out drawing and tension heat setting, wherein the drawing speed is 700m/min, the drawing multiple is 5 times, the drawing temperature is 80 ℃, and the tension heat setting temperature is 80 ℃ to obtain heat-set tows;
(5) introducing the heat-set tows obtained in the step (4) into a crimping machine for crimping, controlling the crimping temperature to be 55 ℃, the diameter of a crimping wheel to be 100mm, and the width of the crimping wheel to be 40mm, so as to obtain crimped tows;
(6) and (5) performing relaxation heat setting on the crimped tows obtained in the step (5) in an infrared radiation mode, and controlling the temperature of the relaxation heat setting to be 70 ℃ to obtain the cigarette tows.
Example 4
The cigarette tows consist of polylactic acid tows and polypropylene tows;
wherein the mass ratio of the polylactic acid tows to the polypropylene tows is 4: 1;
the polylactic acid tows and the polypropylene tows are distributed in the cigarette tows at intervals;
the polylactic acid tow is prepared from the following raw materials in percentage by mass: 70% of polylactic resin and 30% of polyvinyl acetate;
the polypropylene tow is prepared from the following raw materials in percentage by mass: 0.1% of antioxidant 1098, 0.1% of polyethylene glycol and 99.8% of polypropylene resin;
the total line density of the cigarette tows is 3.5 ktex; the filament linear density of the polylactic acid filament bundle is 2.0dtex, the number of crimps is 17/25 mm, and the dry heat shrinkage rate is 1.8%; the filament linear density of the polypropylene filament bundle is 3.7dtex, the crimp number is 21/25 mm, and the dry heat shrinkage rate is 3.1%;
the preparation method of the cigarette tows comprises the following steps:
(1) respectively drying LX130U type polylactic resin and acrylic resin produced by Corbion, Holland by using a drum drying device to reduce the water content to below 200ppm, mixing the dried polylactic resin and acrylic resin, and performing melt plasticization in a single-screw extruder at 250 ℃ to obtain a first melt;
(2) drying 1101S type polypropylene resin produced by Ningxia Huaning coal group Co., Ltd by using a drum drying device to reduce the water content to below 200ppm, mixing the dried polypropylene resin with an antioxidant 1098 and polyethylene glycol, and performing melt plasticizing at 200 ℃ by using a single screw extruder to obtain a second melt;
(3) enabling the first melt obtained in the step (1) and the second melt obtained in the step (2) to enter a spinning box through a filter for spinning, quantitatively conveying the first melt and the second melt to an isolation cavity of a distribution plate in a two-component spinning assembly through a metering pump in the spinning box, and respectively conveying the first melt and the second melt to spaced C-shaped spinneret plate holes of a spinneret plate for spinning to obtain a semi-finished product consisting of polylactic acid tows and polypropylene tows;
wherein the temperature of the filter is 270 ℃, and the mesh number of the filter screen is 300 meshes; the rotating speed of a metering pump for conveying the first melt is 16 revolutions per minute, and the rotating speed of a metering pump for conveying the second melt is 24 revolutions per minute; the number of holes of the spinneret plate is 3000, the hole diameter is 0.2mm, and the length-diameter ratio is 3: 1; the spinning speed is 350m/min, and the spinning temperature is 270 ℃;
(4) cooling the semi-finished product obtained in the step (3) by adopting a side-blowing mode, and controlling the cooling air temperature to be 5 ℃, the air pressure to be 200Pa and the air speed to be 0.2 m/s; then, carrying out surface oiling agent treatment by adopting a mode of oil wheel coating oiling and oil nozzle spraying oiling; then, drawing and tension heat setting are carried out in sequence, wherein the drawing speed is 700m/min, the drawing multiple is 3 times, the drawing temperature is 85 ℃, and the tension heat setting temperature is 90 ℃, so that heat-set tows are obtained;
(5) introducing the heat-set tows obtained in the step (4) into a crimping machine for crimping, controlling the crimping temperature to be 60 ℃, the diameter of a crimping wheel to be 100mm, and the width of the crimping wheel to be 40mm, so as to obtain crimped tows;
(6) and (5) performing relaxation heat setting on the crimped tows obtained in the step (5) in an infrared radiation mode, and controlling the temperature of the relaxation heat setting to be 80 ℃ to obtain the cigarette tows.
Respectively opening and gluing the cigarette tows prepared in the examples 1-4, wherein the opening width is 20cm, a special water-based acrylic adhesive for polypropylene cigarette tows is adopted, the gluing amount is 5% of the weight of the cigarette tows, the cigarette tows are molded by a filter rod molding machine, the cigarette tows are cut into pieces of 120 mm/piece, the tobacco tows are dried for 30min at the temperature of 120 ℃, and then the cigarette tows are balanced for 5 hours at the temperature of 60% humidity and 22 ℃ to obtain the cigarette filter rod.
Performing performance tests on the cigarette filter sticks prepared in the embodiments 1 to 4, wherein the carbon monoxide content of the cigarette filter stick prepared in the embodiment 1 is 8.5 mg/cigarette, the total particle phase content is 16 mg/cigarette, the nicotine content is 1.8 mg/cigarette, the tar content is 14 mg/cigarette, and the water content is 1.8 mg/cigarette; the carbon monoxide content of the cigarette filter stick prepared in the embodiment 2 is 9.2 mg/cigarette, the total particle phase content is 17 mg/cigarette, the nicotine content is 2.0 mg/cigarette, the tar content is 16 mg/cigarette, and the water content is 2.5 mg/cigarette; the carbon monoxide content of the cigarette filter stick prepared in the embodiment 3 is 8.1 mg/cigarette, the total particle phase content is 14 mg/cigarette, the nicotine content is 1.6 mg/cigarette, the tar content is 13 mg/cigarette, and the water content is 1.5 mg/cigarette; the carbon monoxide content of the cigarette filter stick prepared in the example 4 is 7.8 mg/cigarette, the total particle phase content is 12 mg/cigarette, the nicotine content is 1.4 mg/cigarette, the tar content is 12 mg/cigarette, and the water content is 1.4 mg/cigarette.
From the above examples, it can be seen that the tow for cigarette provided by the present invention has excellent thermal stability and excellent filtering performance.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A cigarette tow comprising polylactic acid tow and polypropylene tow;
the mass ratio of the polylactic acid tows to the polypropylene tows is (4-1): 1;
the polylactic acid tow is prepared from the following raw materials in percentage by mass: 50-99.5% of polylactic resin and 0.5-50% of heat stable resin;
the thermally stable resin includes at least one of an acrylic resin, an ethylene-methyl acrylate copolymer, an ethylene-vinyl acetate copolymer, and polyvinyl acetate.
2. The tobacco tow of claim 1, wherein the polylactic acid tow and the polypropylene tow are spaced apart in the tobacco tow.
3. The cigarette tow according to claim 1, wherein the mass ratio of the polylactic acid tow to the polypropylene tow is (2-3): 1.
4. the cigarette tow of claim 1, wherein the polylactic acid tow is prepared from the following raw materials in percentage by mass: 55-98% of polylactic resin and 2-45% of heat-stable resin.
5. The tobacco tow according to claim 1, wherein the total linear density of the tobacco tow is 0.5-6 ktex, the filament linear density of the polylactic acid tow is 2-6 dtex, and the filament linear density of the polypropylene tow is 2-6 dtex.
6. The cigarette tow of claim 1, wherein the polypropylene tow is prepared from the following raw materials in percentage by mass: 0.1-0.3% of antioxidant, 0.1-0.5% of plasticizer and 99.2-99.8% of polypropylene resin.
7. A method of preparing the tobacco tow according to any one of claims 1 to 6, comprising the steps of:
(1) mixing polylactic resin and thermostable resin, and then carrying out melt plasticization to obtain a first melt;
(2) mixing raw materials of polypropylene tows, and then carrying out melting plasticization to obtain a second melt;
(3) respectively conveying the first melt obtained in the step (1) and the second melt obtained in the step (2) to spinneret plate holes at intervals in a two-component spinning assembly for spinning to obtain a semi-finished product consisting of polylactic acid tows and polypropylene tows;
(4) carrying out post-treatment on the semi-finished product obtained in the step (3) to obtain cigarette tows;
the step (1) and the step (2) are not in sequence.
8. The production method according to claim 7, wherein the post-treatment in the step (4) includes cooling, surface finish treatment, drawing, tension heat setting, curl and relaxation heat setting, which are performed in this order.
9. The method according to claim 8, wherein the draft is performed at a factor of 1 to 5 times, the temperature of the draft is 55 to 100 ℃, and the speed of the draft is 100 to 2000 m/min.
10. The method according to claim 8, wherein the temperature of the tension heat setting is 50 to 120 ℃.
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| CN111519277A (en) * | 2020-05-15 | 2020-08-11 | 无锡海特新材料研究院有限公司 | Heat-stable polylactic acid cigarette tow, filter stick and preparation method thereof |
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2021
- 2021-08-02 CN CN202110878805.6A patent/CN113455701A/en active Pending
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