CN1139961A - Fiber production process and fibers resulting from the process - Google Patents
Fiber production process and fibers resulting from the process Download PDFInfo
- Publication number
- CN1139961A CN1139961A CN 95191469 CN95191469A CN1139961A CN 1139961 A CN1139961 A CN 1139961A CN 95191469 CN95191469 CN 95191469 CN 95191469 A CN95191469 A CN 95191469A CN 1139961 A CN1139961 A CN 1139961A
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- Prior art keywords
- tow
- lyocell
- fiber
- fibers
- wet
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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
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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
- A24D3/06—Use of materials for tobacco smoke filters
- A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
- A24D3/10—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent of cellulose or cellulose derivatives
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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
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Cigarettes, Filters, And Manufacturing Of Filters (AREA)
- Artificial Filaments (AREA)
Abstract
通过将湿的纤维传送穿过一压实设备，诸如一供有蒸汽(37A)的填塞箱(32)，能在lyocell纤维(19)上制得卷曲。所述方法能提供一些永久性的卷曲，这些卷曲例如在加工人造短纤维的过程中具有优点。所述方法能用来制造高程度的卷曲，所述卷曲例如在制造滤嘴杆中具有优点。
Crimping can be achieved on lyocell fibers (19) by conveying wet fibers through a compaction device, such as a packing box (32) supplied with steam (37A). This method can provide some degree of permanent crimping, which is advantageous, for example, in the processing of synthetic short fibers. The method can also be used to produce a high degree of crimping, which is advantageous, for example, in the manufacture of filter rods.
Description
Background of the present invention
1. the field of the invention
The present invention relates to the processing of a kind of lyocell fiber (also can be described as solvent spun fibre), described lyocell fiber has permanent curl, and compare permanent fold with known lyocell fiber, the invention still further relates to the fiber that makes with this processing with higher degree.The permanent fold ＂ of ＂ used herein is meant that what still keeping curls when wetting drying once more and the fiber that curls.
2. the narration of correlation technique
The lyocell fiber is a known materials, and at for example U.S. US-A-4, has described the manufacture method of this lyocell fiber in 246,221 patents.They be Courtaulds Fibres (Holdings) Limited that can buy on the market sell with ' Tencel ' is this lyocell fiber of trade mark.By with cellulose dissolution in known organic solvent, and push this solution and pass a spinning head, enter a coagulating bath and make, described coagulating bath becomes fiber with described cellulose precipitation, and solvent is washed out from described fiber.This processing can be called solvent spinning, and the lyocell fiber also can be called Lyocell fibre.Described cellulose is wood pulp normally.Described solvent can be the N-tertiary amine oxide aqueous solution (amine oxide) that is mixed with proportions water usually, N-oxidation N-methylmorpholine preferably, a wherein preferably water-bath of coagulating bath.Behind the precipitation, described lyocell fiber has obtained cleaning and is dry in coagulating bath.Describedly be the form of continuous filament yarn through the lyocell of precipitation fiber, and can be the form of a tow, described tow contains several thousand this continuous filament yarns.For some final use, for example in the fabric that interweaves of producing some type, described lyocell fiber uses with this tow form.For other final use, in the production process of staple fibre yarn, at first be that described tow is cut into all segments to form staple fiber (staple) for example.One lyocell tow can between described cleaning and drying process, or after drying, be transformed into staple fiber between described precipitation operation and matting.In the production process of the staple fibre yarn that is undertaken by ring spinning and other similar processing, staple fiber is formed a parallel fibers net by combing, stretching or the described fiber web of drawing-off (normally in several stations) are twisted described dandy roving to form described spun yarn to form a dandy roving.Described fiber web and rove are kept together at least in part by curling of fiber.
Solvent spinning processing is different from the processing method of other known manufacturing cellulose fibre, and described known fabrication method depends on the formation and the decomposition of cellulosic chemical derivative, for example viscose glue processing.Viscose rayon fibre has intrinsic curling usually, and as natural cellulose fibre, such as cotton sample, and the lyocell fiber has seldom usually or there do not have to be curling.Curling in a lot of final uses is the needed a kind of fiber properties of people.After the process of the fabric of making staple fibre yarn or interweaving neutralized this process, curling provided cohesive force between all fibers.Therefore the shrinkage fiber is crimped onto the coating ability that provides better in the textile material, and higher absorbability is provided in absorbing products than the shrinkage fiber is more not bulk.In the world inventions patent WO94/28220 that announced on December 8th, 1994, point out, with the lyocell tow of a drying logical wear a stuffer box can shrinkage lyocell fiber.With steam, preferably the dry saturated steam spray goes into to promote this shrinkage effect in the stuffer box.Described shrinkage fiber can have about 2.0 or 2.2 all curling for every centimetre, has 1.5 to 2.2 main curls usually.What can believe is that this shrinkage processing can not be made curling of obvious higher degree on fiber.Yet this curling is not nonvolatil.When combing lyocell staple fiber, most of curling will be removed and all be removed in drawing-off operation subsequently.If soak this shrinkage fiber again, all basically curling can disappearances.
General introduction of the present invention
According to a first aspect of the invention, the invention provides a kind of processing method that is used for producing the lyocell fiber, its characteristics comprise described lyocell fiber and to make nonvolatil fold thus with the form of the wet tow operation through a compacting equipment on described fiber.The fiber that described according to a first aspect of the invention processing method makes preferably every centimetre have 1.0 main curls at least.The described processing method of first aspect present invention can also provide some interim curling on described fiber.Described compacting equipment is a stuffer box preferably, though also can use the compacting equipment of other form, forces fiber to enter rolling a little or enter the equipment that rolls between all rollers a little with overfeeding between a roller and a fixed blade such as those dependence.
The processing method of first aspect present invention is not preferably carried out on the tow of dried state one, and be preferably in dry before through clean, do not carry out on the tow of dried state.The lyocell fiber of dried state does not contain weight usually and accounts for 60% moisture content greatly.Perhaps, method of the present invention also can drying in advance, and and then sending into compacting equipment before carry out on the tow got wet.Should be understood that these transformable technology can produce curling of different characteristic, for example angled curling.
A second aspect of the present invention provides a kind of lyocell fiber, is characterized in that every centimetre of described fiber has 3.0 main curls at least.A third aspect of the present invention provides a kind of lyocell fiber, and described fiber has 1.0 permanent main curls for every centimetre at least.
The lyocell fiber of second aspect present invention can have about 7.5 main curls for every centimetre.Have been found that every centimetre have the lyocell fiber that surpasses 6.0 main curls can not be by the more convenient ground shredding of traditional textile processing equipment.Can produce in the curling shrinkage processing of high level one, described fiber is easy to be subjected to physical damnification, has produced all weakness thus on fiber.In addition, in this shrinkage processing, the sharp-pointed permanent of rectangular racing form that may form more or less curls, and these racing forms tend to cause mutual interlocking.Having the lyocell fiber that high level curls is that twisted and elasticity are arranged, and the lyocell tow of this fibrid is useful for making absorbing products, such as tampon and cigaratte filter.Fiber according to third aspect present invention can have about 4.0 main curls for every centimetre.
A fourth aspect of the present invention provides a kind of method that is used for making the lyocell fiber, and its step is as follows:
(a) with cellulose dissolution in a solvent to form a solution;
(b) push described solution, make it to pass a spinning head, enter a coagulating bath, to form continuous cellulosic filaments;
(c) water cleans described continuous filament yarn with except that desolvating, and forms a lyocell fiber dried state, wet tow form thus;
(d) described wet tow is passed through a compacting equipment, make lyocell fiber dried state, shrinkage thus;
(e) the lyocell fiber of dry described not dried state, shrinkage makes ly-ocell fiber dry, shrinkage thus.
Preferably a kind of N-tertiary amine oxide of described solvent aqueous solution, N-oxidation N-methylmorpholine preferably, wherein preferably water-bath of coagulating bath.The lyocell fiber of described shrinkage shows nonvolatil the curling that has to a certain degree usually.
The described processing method of fourth aspect present invention, also additional may further comprise the steps:
(f) before or after drying steps (e), the lyocell fiber of shrinkage is transformed into staple fiber.
Be dried in the lyocell fibre manufacture of tow at fiber, described tow can be at a for example rotary drum drying machine or is preferably carried out drying on the belt drying machine.When using a rotating drum type drying machine, described tow passes through on rotating drum type drying machine heating, that can be equipped with the hole at one or more with the form that stretches, and the superficial velocity of all rotating drum type drying machines therefore must be more roughly the same than the extrusion speed that passes spinning head.This has limited maximum line velocity substantially, and has therefore limited the productivity ratio of all spinning heads.By using more rotating drum type drying machine can improve maximum line velocity, but this but needs expensive cost.In addition, dry tow through elongation relates to tow is applied tension force, and this may remove some at least and curl.When using a belt drying machine, described tow is unfolded or inverted pleat has being with of mesh one, and hot gas (normally air) is blown over described belt, and therefore the linear velocity of described dryer can be the part of extrusion speed.Therefore, can adopt higher extrusion speed, improve the productivity ratio of spinning head thus.When having been found that the lyocell tow when the not shrinkage of dry prior art on a belt drying machine, the fiber in the described tow is easy to be sticked together.Therefore, hot gas can not pass described tow easily, and consequently drying is slower and inhomogeneous, and the productivity ratio advantage that this fact and belt drying machine are had is inconsistent.On the contrary, the lyocell fiber that is the shrinkage of moisture state of the present invention can launch on a belt drying machine fully, thereby good air permeability and quick, uniform drying operation can be provided.Perhaps, before carrying out drying on the belt drying machine, can be lyocell tow dampness, shrinkage with one and be cut into staple fiber.Should be understood that, after drying operation, can not be easily to the processing of curling of the lyocell staple fiber of not shrinkage.
Usually, the fiber with low amount of crimp carries out a kind of cohesive force spinning arrangement (cohesive spin-finish) operation, to help to carry out the processing such as combing and spinning.Cohesive force spinning arrangement makes the fiber feel coarse usually.An advantage of the present invention is on fiber to produce to curl and means and can use less cohesive force spinning arrangement, makes the lyocell fiber have desirable soft feel thus.
Brief Description Of Drawings
Now more specifically narrate the present invention in conjunction with the accompanying drawings, in each accompanying drawing:
Fig. 1 is the schematic flow sheet according to each station in the process of shrinkage lyocell fiber of the present invention;
Fig. 2 is the schematic diagram of shrinkage processing of the present invention, and wherein the lyocell fiber passes a stuffer box;
Fig. 3 is a schematic diagram of steam being supplied with stuffer box;
Fig. 4 is to use the schematic diagram of the another kind of compacting equipment of a Vickery blade.
The narration of preferred embodiment
Fig. 1 shows a mixing chamber 10, and this mixing chamber has inlet 11 and 12, imports the cellulose through discerping and the solvent of amine oxide aqueous solution respectively.Described cellulose dissolution is in described solvent, to form a kind of solution.A kind of from mixing chamber hot solution mat one measuring pump 13 and be sucked up to a spinning head 14, described solution passes this spinning head and is extruded to form a continuous fibre bundle.
When described hot solution was left spinning head 14 with the form of thread 14a, described hot solution was through a coagulating bath 16, and the mixture of water and amine oxide obtains recirculation in this coagulating bath.Coagulating bath 16 can comprise weight and be approximately 25% amine oxide.Cellulose is from described solution precipitation, and forming all solid-state long filament 15a, and solvent is washed off from described all long filaments.Come out from coagulating bath l6, a large amount of fine plain long filaments that are tow 15 forms are through roller 17, and by through a water-bath 18.Width through the tow of water-bath can be, for example, and 30 to 35 centimetres (12 to 14 inches).Also can use more this water-bath.In described water-bath or a plurality of water-bath, residual amine oxide is washed from all fiber filaments, and is lyocell fibers from the tow 19 that described water-bath or a plurality of water-bath are drawn.The fiber number of all fiber filaments in tow can be for example in 1 to 10 dtex scope, usually in 1.5 to 5 dtex scopes.
Put station 19A from the tow (existing label 19) that water-bath 18 is come out in order through one,, use in prior art all long filaments is lubricated as the well-known spinning oil of people at this station place.
Then, wet tow is admitted to by rolling a little that roller 21 and 22 forms, rolls a tow from this and is admitted in the stuffer box 23.The all inlets 24 of mat are sent into steam in the stuffer box, substantially as shown by arrows.
Should be understood that, or, described wet, untrimmed tow also can be conveyed in the described stuffer box, spray into the method for stuffer box with spinning oil, fiber is applied spinning oil, perhaps at tow after stuffer box comes out, spinning oil is sprayed onto on the tow.Had been found that before entering stuffer box, fiber is added spinning oil can help the fold operation, and this method may be preferable.
The degree of folding that produces in described stuffer box usually can be in the scope of every centimetre of 1.0 to 7.5 main curls.(should be understood that the fiber that has main curl 34A shown in figure 2 can be straight arrangement or wavy arrangement, that is, they also can have inferior curling 34.) if described fiber is finally to be used for textiles, then degree of folding is preferably in every centimetre of scope with 1.5 to 3.0 main curls.
When tow during from stuffer box 23 output, tow may obtain compacting on width, thereby allows to broaden during by a dryer when tow.Then, the tow 25 of shrinkage is through a drying oven 20 that remains on high temperature.The described drying oven banding pattern of preferably boring a hole perhaps also can be a jar type, roll type or perforation rotating cylinder.The temperature of described drying oven depends on the design and the structure of drying oven, but substantially in 60 to 180 ℃ scope.
Be sent to a cutter 27 from the shrinkage of dryer 20 outputs, dry tow (existing label is 29) by a roller 26, at this cutter place tow cut, to form staple fiber.The length of staple fiber being cut at cutter 27 places will depend on the final use of described staple fiber.Therefore, for example papermaking being required 3 to 6 millimeters length, is 6 to 15 millimeters to the non-weaving cloth fabric, and it is 30 to 60 millimeters that the non-weaving cloth that is used for cotton type yarn and combing is weaved, and is 60 to 150 millimeters to combed yarn.These various final uses all need different filament linear-densities usually, as people in prior art known.The fiber number of long filament usually can be in the scope of 1 to 30 dtex, mainly is in the scope of 1 to 3 dtex to the use of cotton type, and it mainly is in the scope of 2 to 8 dtexs that the combing type is used.The staple fiber of shrinkage is collected in the carton 28.Perhaps, shrinkage, dry tow also can be collected in the mode of tow, thereby save the step of cutting processing.A kind of like this tow can be used for making the absorbing products of some type, for example cigaratte filter.
As illustrated, an independent tow can spray from spinning head 14, and described tow can comprise and for example reaches 20,000 monofilament, and after super-dry processing, its basic weight can be for example 30 to 65,000 spies, and promptly 30 to 65g/m.The basic weight of the tow that the manufacturing cigaratte filter is used can be in 5 to 8,000 spies' scope.Perhaps, all tow that spray from several spinning heads can be combined into a single big tow, and before the process compacting equipment, this tow can contain for example 0.2 to 100 ten thousand monofilament,
At present, cigaratte filter is known by people, and wherein the filter tip main body of cigaratte filter contains a fibre bundle, the plain cellulose acetate tow of particularly a kind of dimension.Described tow is parallel to the longitudinal axis setting of filter tip (or cigarette).The main body of this known filter tip can only be formed a kind of so-called ＂ monobasic ＂ structure by this tow.Perhaps, the main body of this known filter tip also can comprise the paper filtration members that constitute, that be provided with in inside of a filtration members that made by this tow, that externally be provided with and compression and fold, and makes what is called " double base " structure.The main body of this known filter tip can also comprise a filtration members that made by this tow, that externally be provided with, the one intermediate filtered part of making by active carbon, and a paper compressed and fold filtration members that make, that be provided with in inside, and make so-called " ternary " structure.Compare with the acetate tow filtration members, the paper filtration members has higher filter effect, but when smoking and with one undesirable " paper " when taste is passed to cigarette, this filtration members is easy to become tide and easy pressurized.
The present invention also provides a cigaratte filter, and its characteristics are that the main body of this filter tip contains the ly-ocell tow of shrinkage, or are made of this tow.Consider that compare with known cellulosic acetate tow filter, this filter tip has higher filter effect.From reducing cigarette coke tar content, this is the advantage place of this cigarette.This filter tip can be made by the method for using known manufacturing tow filter.The present invention also provides a cigarette of containing this filter tip.
Fig. 2 more specifically shows the curling station of this processing.
Tow 19 enters and rolls a little 30 between two rollers 21 and 22, enter in the stuffer box 23 with the speed of fully filling up stuffer box channel 31 from rolling a little 30, described passage is formed between dull and stereotyped 32 and 33, and extend to the outlet 35 of stuffer box from rolling a little 30 outlet, make thus all filaments with the longitudinal separation of rule wrinkling or gauffer.By roller 21 and 22 pressure that produce liquid is discharged from described tow.The tow of shrinkage is compressed between the interior flat board 32 and 33 of stuffer box, forms a series of circle ring 34 (having strengthened all spacings for the purpose of clear) as shown in the figure, and becomes permanent curly form at outlet 35 places.Steam is injected in the described stuffer box, as shown by arrows, and passes all holes 36 on dull and stereotyped 32 and 33, thereby can contact described tow when passage 32 transmits at tow.
If wish to make every centimetre approximately have 2.0 to 2.5 main curls be used to weave the fiber of processing, the pressure between the pressure roller 21 and 22 should be in about scope of 0.3 to 0.5bar.The plate 32 of stuffer box is removable, and preferably is about 0.0 to 0.2bar external pressure and can be fixed on its position by applying, and higher pressure is applied to will make on the top board 32 and produces curling of higher degree.
As shown in Figure 3, be injected into and pass a dryer 37 with a series of dividing plates from the steam of a vapour source, described vapour source is illustrated in the 37A place generally, is about 5.7bar (85p.s.i).Then, dry steam is transmitted through a pressure-reducing valve 39, and for example, a barrier film pressure-reducing valve is reduced to steam pressure at this pressure-reducing valve place for example 4.3bar or 3bar (65p.s.i. or 45p.s.i).Then, the steam of step-down is sent in the stuffer box 23, at this stuffer box place, steam is transmitted through all holes on the flat board 32 and 33 to contact the tow of the shrinkage in above-mentioned passage 31.Can spray additional soft finishing agent, preferably a synthetic finishing agent rather than saponification finishing agent pass all holes that are formed on dull and stereotyped 32 and 33, with lubricant fiber.
Consult Fig. 4, once cleaning and lubricated lyocell fibre bundle 40 is transmitted and passes one and be located at primary input between a home roll 42 and one first roller 43 and roll a little 41.Around by home roll 42, approximately less than 1/4th circles after, described tow 40 passes one and is located between a home roll 42 and the control roll 45, control rolls a little 44.And then, described tow 40 peels from home roll 42 under the effect of scraper plate 46.Described scraper plate 46 preferably contacts gently with the surface of home roll 42, and provide a bite with respect to the home roll surface with about 70 ° acute angle degree setting or at its near surface.Then, tow be conveyed through one by one the case top 48 and one the case at the bottom of 47 casings that constitute 50, be the extension of described scraper plate 46 at the bottom of the described case.Home roll 42, scraper plate 46 and casing 50 have constituted a compacting equipment together.50 width can be 80 centimetres at the bottom of the described case, and height at the bottom of the described case and length can be selected so that needed crimpness is provided on fiber.In case from output between case top 48 and the case top 47, described tow 40 just is placed on the conveyer belt 49, delivers to a dryer (not shown) thus.
All curling number on the lyocell fiber can be measured in the following manner.It is 12-15 centimetre fibre bundle that the dry tow of one length in 1 meter scope is cut into six segment length randomly.All fibre bundles should not be the edges of taking from raw tow.If the fibre single thread fiber number is approximately 1 to 3 dtex, then a fibre bundle should contain about monofilament of 1000 to 1500 (about 200 spies), is somewhat dependent upon filametntary fiber number though should be understood that the preferred dimensions size of a fibre bundle.Then, an end of each fibre bundle is clamped on the plate, and stretching lightly all curling.If can not be stretching all curls, then described sample may be too big, and should select a sample that contains less monofilament.Fibre bundle marks the point that leaves 10 centimetres in this clip on the fibre bundle under the state that stretches then.Described fibre bundle is allowed to loosen, and number goes out the number that curls between described clip and the described mark.The sample length that this number is stretched (10 centimetres) removes, and promptly obtains every centimetre of main curl number that has.The result of average six section fibre bundle gained.
Claims (12)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9404547A GB9404547D0 (en) | 1994-03-09 | 1994-03-09 | Fibre production process |
| GB9404547.3 | 1994-03-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1139961A true CN1139961A (en) | 1997-01-08 |
Family
ID=10751543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95191469 Pending CN1139961A (en) | 1994-03-09 | 1995-03-02 | Fiber production process and fibers resulting from the process |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0749502A1 (en) |
| JP (1) | JPH09509987A (en) |
| CN (1) | CN1139961A (en) |
| GB (1) | GB9404547D0 (en) |
| WO (1) | WO1995024520A1 (en) |
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| TW389799B (en) | 1995-08-29 | 2000-05-11 | Asahi Chemical Ind | Cellulose multifilament yarn and fabric made thereof |
| TW392003B (en) | 1995-10-11 | 2000-06-01 | Asahi Chemical Ind | False twist yarn |
| AT402741B (en) † | 1995-10-13 | 1997-08-25 | Chemiefaser Lenzing Ag | METHOD FOR PRODUCING CELLULOSIC FIBERS |
| GB9526168D0 (en) * | 1995-12-21 | 1996-02-21 | Courtaulds Fibres Holdings Ltd | Fibre manufacture |
| JP3186629B2 (en) | 1997-02-13 | 2001-07-11 | 三菱レイヨン株式会社 | Acetate composite entangled yarn and its manufacturing method |
| GB2325248B (en) * | 1997-05-15 | 2001-06-27 | J R Crompton Ltd | Paper |
| AT6807U1 (en) * | 2004-01-13 | 2004-04-26 | Chemiefaser Lenzing Ag | CELLULOSIC FIBER OF THE LYOCELL GENERATION |
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| EP1911362A1 (en) * | 2006-09-29 | 2008-04-16 | Philip Morris Products S.A. | Appartus for blooming cigarette filter tow band |
| DE102007029831A1 (en) | 2007-06-28 | 2009-01-08 | Reemtsma Cigarettenfabriken Gmbh | Process for producing tobacco smoke filters |
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| GB201311450D0 (en) * | 2013-06-27 | 2013-08-14 | British American Tobacco Co | A method and an apparatus for manufacturing a filter for a smoking article |
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| WO2016052998A1 (en) * | 2014-09-30 | 2016-04-07 | 코오롱인더스트리 주식회사 | Lyocell crimped fiber |
| US10524500B2 (en) | 2016-06-10 | 2020-01-07 | R.J. Reynolds Tobacco Company | Staple fiber blend for use in the manufacture of cigarette filter elements |
| CN110290713B (en) * | 2017-01-30 | 2022-02-08 | 日本烟草产业株式会社 | Manufacturing method of tobacco raw material and tobacco raw material |
| GB201811808D0 (en) * | 2018-07-19 | 2018-09-05 | Univ Leeds Innovations Ltd | Composite materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1138302A (en) * | 1965-06-15 | 1969-01-01 | Chemcell Ltd | Preparation of filter tow |
| MY131648A (en) * | 1993-05-24 | 2007-08-30 | Courtaulds Fibres Holdings Ltd | Manufacture of crimped solvent-spun cellulose fibre |
-
1994
- 1994-03-09 GB GB9404547A patent/GB9404547D0/en active Pending
-
1995
- 1995-03-02 EP EP95909899A patent/EP0749502A1/en not_active Withdrawn
- 1995-03-02 WO PCT/GB1995/000454 patent/WO1995024520A1/en not_active Ceased
- 1995-03-02 JP JP7523291A patent/JPH09509987A/en active Pending
- 1995-03-02 CN CN 95191469 patent/CN1139961A/en active Pending
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| CN101175876B (en) * | 2004-06-25 | 2011-04-27 | 赛拉尼斯醋酸盐有限公司 | Cellulose acetate tow and its production method |
| CN101743347B (en) * | 2007-07-11 | 2014-12-17 | 连津格股份公司 | Fibrefill fibre having improved opening characteristics, production and use thereof |
| CN104411189A (en) * | 2012-07-13 | 2015-03-11 | 菲利普莫里斯生产公司 | Degradable filter for smoking articles |
| CN105556012B (en) * | 2013-06-28 | 2019-11-19 | 可隆工业株式会社 | Lyocell material for tobacco filter and manufacturing method thereof |
| CN105556012A (en) * | 2013-06-28 | 2016-05-04 | 可隆工业株式会社 | Lyocell material for tobacco filter and method for preparing same |
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| CN106661768B (en) * | 2014-06-30 | 2019-05-07 | 可隆工业株式会社 | Improved cross-section lyocell material for tobacco filters and method of making the same |
| US11103003B2 (en) | 2014-06-30 | 2021-08-31 | Kolon Industries, Inc. | Modified cross-section lyocell material for tobacco filter, and preparation method therefor |
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| CN107075739A (en) * | 2014-09-30 | 2017-08-18 | 可隆工业株式会社 | Lyocell crimped fibre |
| CN107075739B (en) * | 2014-09-30 | 2020-02-18 | 可隆工业株式会社 | lyocell crimped fibers |
| US10617146B2 (en) | 2014-12-31 | 2020-04-14 | Kolon Industries, Inc. | Method of manufacturing a lyocell material for a cigarette filter |
| CN110678595A (en) * | 2017-05-26 | 2020-01-10 | 冈本株式会社 | Fibrous product and method of making same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0749502A1 (en) | 1996-12-27 |
| GB9404547D0 (en) | 1994-04-20 |
| WO1995024520A1 (en) | 1995-09-14 |
| JPH09509987A (en) | 1997-10-07 |
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