CN102560902A - Method for producing viscose cellulose spun-laid nonwoven - Google Patents
Method for producing viscose cellulose spun-laid nonwoven Download PDFInfo
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- CN102560902A CN102560902A CN2012100077076A CN201210007707A CN102560902A CN 102560902 A CN102560902 A CN 102560902A CN 2012100077076 A CN2012100077076 A CN 2012100077076A CN 201210007707 A CN201210007707 A CN 201210007707A CN 102560902 A CN102560902 A CN 102560902A
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Abstract
A method for producing a viscose cellulose spun-laid nonwoven is characterized by including the steps: subjecting viscose cellulose spinning dope to extrusion via a spinning jet and drafting by air bath, and allowing the viscose cellulose spinning dope to enter a horizontal movement conveying belt device; spraying coagulating bath above a conveying belt; conveying coagulated fibers into a spunlace nonwoven processing device; and forming the nonwoven by carding and laying. The method has the advantages that the occupied area is small, operation is simple and cost is low. The processed spunlace nonwoven has small fiber diameter, diameter variation coefficient is increased, crimpness is improved, the spunlace nonwoven is fluffy, softly glossy, good in touch, high in strength, highly soft, high in moisture absorbability and high in electrostatic resistance, and the spunlace nonwoven is widely applicable to the fields of electronic wipes, sanitary ware, lather linings and the like.
Description
Technical field
The present invention relates to the chemical fibre manufacturing technology, be specially a kind of prezenta spinning solution and behind wet spinning, directly carry out water and sting into the manufacturing technology that net obtains non-weaving cloth.
Background technology
Cellulose fibre is one type of widely used regeneration natural fabric, has good hygroscopicity, gas permeability, does not produce static, characteristics such as dyeability is good.The production method of cellulose long fiber mainly contains viscose process, cuprammonium process, cellulose carbamate method and novel solvent method etc. at present.Cuprammonium process and the application of cellulose carbamate method in actual production are less.Viscose process and be that the novel solvent method of representative is to use more production technology with the Lyocell fiber.The Lyocell fiber is directly to carry out wet spinning after cellulose is dissolved in solvent NMMO, and is little to the pollution of environment.Because solvent NMMO wants recycling use, so having relatively high expectations to equipment.Viscose process is that natural fabric is handled with caustic soda, carbon disulfide, obtains orange-yellow sodium cellulose xanthate, is dissolved in the diluted sodium hydroxide solution again, becomes the spinning solution of thickness, behind wet spinning, obtains cellulose fibre.Although can use poisonous carbon disulfide in process of production, need the three wastes (waste gas, waste water and waste residue) are handled, this method is still one of main production and processing mode of present cellulose fibre.
After the cellulosic filaments that said method obtains is cut to staple fibre, through the combing lapping, pass through different manufacturing process again, like acupuncture, water thorn or hot rolling fiber web is reinforced and can be made non-weaving cloth.Chinese patent 200610016426.1 has reported that a kind of prezenta staple fibre that contains hydroxyethyl chitosan, fibroin modification makes fiber arrange again, twine each other through the current of high velocity jet, is processed into the method for hydro-entangled non-woven fabric.Utilize polymer filaments also can directly be processed into non-weaving cloth.Method commonly used at present has meltblown and spun-bond process, and these two kinds of methods are only applicable to the polymer of melt-processable.Chinese patent 94114917.X has reported a kind of mixture long filament with high-pressure fluid jet processing polyamide and polyester, makes it to take place effectively entanglement and crosslinked, and then is processed into the production method of non-weaving cloth.United States Patent (USP) 3833438 has been reported the cuprammonium process cellulose spinning fluid through under negative pressure, forming the method for non-weaving cloth behind the wet spinning.United States Patent (USP) 6221487 reported the Lyocell cellulose spinning fluid through centrifugal spinning or solvent spinning after the method for non-weaving cloth directly is processed in heat bonding.This Lyocell fiber directly is processed into the technology of non-weaving cloth, has improved the little shortcoming of cellulosic filaments crimpness in the past.The fibre fineness that obtains thus is little, and crimpness increases, and glossiness reduces, and the fibrillation phenomenon during the hygrometric state friction weakens, and the atomizating phenomenon when making the pilling effect of fiber under hygrometric state with dyeing weakens.
Summary of the invention
The objective of the invention is to propose a kind of prezenta spinning solution Direct Water behind wet spinning and sting into the method that net is processed into non-weaving cloth.
The object of the invention is realized through following technical proposals: a kind of manufacturing approach of prezenta non-weaving cloth; It is characterized in that adopting following processing step: a kind of prezenta spinning solution through spinning head extrude, the vertical conveyor-belt apparatus that gets into a level run after the air bath drawing-off; Coagulating bath is sprayed in the conveyer belt top; Fiber behind the coagulation forming is transported into the hydro-entangled non-woven fabric processing unit (plant), under the injection of High-Pressure Water, arranges again, twines each other, forms non-weaving cloth.
Described rayon spinning liquid is to be raw material with the native cellulose pulp, with the orange-yellow sodium cellulose xanthate that NaOH, carbon disulfide obtain after handling, is dissolved in the spinning solution of the thickness that forms in the diluted sodium hydroxide solution again.
The extruded velocity of described prezenta spinning solution is 0.1-50g/min.The extruded velocity of prezenta spinning solution is fast more; The spinning solution of extruding through spinning head in unit interval is many more; The diameter of fiber is thick more, and this becomes difficult with regard to the coagulation forming that makes the fiber sandwich layer, thereby needs the follow-up process of setting of strict control could obtain the fiber of even structure.The extruded velocity of prezenta spinning solution is too slow, and then fibre diameter is thinner, is easy to take place the broken end phenomenon, is unfavorable for obtaining stable spinning process.The extruded velocity of preferred prezenta spinning solution is 0.1-10g/min.
Described rayon spinning liquid gets into the long air bath of 0.05-2m after spinning head is extruded.Rayon spinning liquid is extruded the back from spinning head and air bath, is cooled off, and refinement makes the viscose glue as-spun fibre obtain certain intensity.Air bath length is too short, and then the intensity of prezenta as-spun fibre reduces, and influences follow-up processing characteristics; Air bath length is oversize, and the cortex construction of the as-spun fibre of acquisition increases, and fibre strength increases, but the setting rate of fiber sandwich layer in follow-up coagulating bath slowed down, and the overall performance of fiber is descended.Air bath length is preferably 0.2-1m, at this moment can obtain fibre property preferably.
The speed of service of described conveyer belt is 5-50m/min.The speed of service of conveyer belt influences the time of staying of prezenta on conveyer belt.The speed of conveyer belt is fast more, and the time of staying of prezenta on conveyer belt is short more, and coagulating bath is just short more to the setting time of fiber, and the state of cure of fiber is lower, and intensity is relatively poor; Otherwise the speed of conveyer belt is slow more, and the time of staying of prezenta on conveyer belt is long more, and then the coagulation grade of fiber is higher, and intensity is better, but needs to consume a large amount of coagulating baths.Preferred line speed is 5-20m/min.
Described coagulation bath composition is for containing 45% (NH
4)
2SO
410% H
2SO
4Solution.
Described coagulation bath temperature is 30-40 ℃.Coagulation bath temperature is high more, and the setting rate of prezenta is just fast more; Otherwise then the setting rate of prezenta is just slow more, the mechanical property variation of fiber.
The spray rate of described coagulating bath is 0.05-1L/min.The spray rate of coagulating bath is fast more, and the state of cure of prezenta is high more; Otherwise the state of cure of prezenta is just low more, and the intensity of fiber is just low more.The spray rate of preferred coagulating bath is 0.1-0.5L/min.
The water thorn pressure of described hydro-entangled non-woven fabric processing unit (plant) is 40 * 10
5Pa.
The combination property that prezenta wet spinning water stings into the non-weaving cloth that net obtains mainly obtains by regulating technological parameters such as spinning solution extruded velocity, air bath length, line speed, coagulation bath temperature, coagulating bath spray rate.
Superiority of the present invention is: the present invention proposes a kind of rayon spinning liquid behind wet spinning, directly carries out the method that the water thorn is processed to form non-weaving cloth.Prezenta wet spinning technology of the present invention, hydro-entangled non-woven fabric processing technology are originally as prior art.Prezenta non-weaving cloth manufacturing approach of the present invention is the viscose filament yarn that original prezenta forms behind wet spinning to be cut to staple fibre and then short-fiber spunlaced one-tenth net is processed into these two technical process of non-weaving cloth merge into a technical process.Method of the present invention is equipment adjustment and the process innovation that on original prezenta wet spinning and non-woven water thorn net-forming process basis, carries out; Change to existing equipment is little; Thereby have the advantages that floor space is little, simple to operate, cost is low, be easy to make technological knowledge popular.Compare with stung into the non-weaving cloth that net obtains by the viscose staple fibre Direct Water, the fibre diameter of the non-weaving cloth that the present invention obtains is thinner, and diameter degree of becoming different increases, and crimpness increases, and gloss is soft.Compare with the viscose glue non-weaving cloth that obtains through other non-weaving cloth processing method, the viscose glue non-weaving cloth that utilizes the method for the invention to obtain has good intensity, flexibility, hygroscopicity and antistatic behaviour, and structure is fluffy, good hand touch.The prezenta non-weaving cloth that utilizes method of the present invention to obtain can further be applied to fields such as electronics cleaning wiping cloth, amenities, leather base cloth.
Description of drawings
Fig. 1 is that Direct Water is stung into the process chart that net is processed into non-weaving cloth behind the prezenta wet spinning.
The specific embodiment
Further narrate the present invention below in conjunction with embodiment.
Shown in process chart, Direct Water is stung into the technical process that net is processed into non-weaving cloth and is followed successively by behind the prezenta wet spinning: pulp, alkali cellulose, cellulose sulfonate, viscose glue, spinning, shaping, water thorn, dry, reel.
The coefficient of variation of prezenta non-weaving cloth fibre diameter is meant the average variance that calculates after the diameter averaged to 50 fibers among the embodiment, in order to describe the uniformity coefficient of fibre diameter.The coefficient of variation is big more, and the diameter Distribution of fiber is wide more, and diameter is inhomogeneous more.
The present invention and part are applicable to prior art.
Below provide specific embodiment of the present invention, the present invention does not receive the restriction of specific embodiment.
Embodiment one
5% sodium hydroxide solution that will contain prezenta 9% carries out wet spinning after filtration, deaeration, the spinning head extruded velocity is 0.8g/min.After the air bath of viscose glue as-spun fibre through 50cm length of spinning head ejection, get into conveyer belt, line speed is 5m/min.Coagulating bath is sprayed in the conveyer belt top, and coagulation bath composition is for containing 40% (NH
4)
2SO
410% H
2SO
4Solution, temperature are 30 ℃, and spray rate is 0.1L/min.The fiber of coagulation forming forms non-weaving cloth again after the current of high velocity jet are wound in net.The average diameter 5.2 μ m of fiber, the coefficient of variation is 10.2%, vertically dry strength is 2.1CN/dtex.
Embodiment two
5% sodium hydroxide solution that will contain prezenta 9% carries out wet spinning after filtration, deaeration, the spinning head extruded velocity is 5g/min.After the air bath of viscose glue as-spun fibre through 100cm length of spinning head ejection, get into conveyer belt, line speed is 10m/min.Coagulating bath is sprayed in the conveyer belt top, and coagulation bath composition is for containing 40% (NH
4)
2SO
410% H
2SO
4Solution, temperature are 35 ℃, and spray rate is 0.3L/min.The fiber of coagulation forming forms non-weaving cloth again after the current of high velocity jet are wound in net.The diameter of fiber is 13.2 μ m, and the coefficient of variation is 18.7%, and vertically dry strength is 4.5CN/dtex.
Embodiment three
5% sodium hydroxide solution that will contain prezenta 9% carries out wet spinning after filtration, deaeration, the spinning head extruded velocity is 22g/min.After the air bath of viscose glue as-spun fibre through 100cm length of spinning head ejection, get into conveyer belt, line speed is 25m/min.Coagulating bath is sprayed in the conveyer belt top, and coagulation bath composition is for containing 40% (NH
4)
2SO
410% H
2SO
4Solution, temperature are 40 ℃, and spray rate is 0.6L/min.The fiber of coagulation forming forms non-weaving cloth again after the current of high velocity jet are wound in net.The diameter of fiber is 18.1 μ m, and the coefficient of variation is 30.6%, and vertically dry strength is 3.9CN/dtex.
Claims (7)
1. the manufacturing approach of a prezenta non-weaving cloth; It is characterized in that adopting following processing step: the prezenta spinning solution through spinning head extrude, the vertical conveyor-belt apparatus that gets into a level run after the air bath drawing-off; Coagulating bath is sprayed in the conveyer belt top; Fiber behind the coagulation forming is transported into the hydro-entangled non-woven fabric processing unit (plant), forms non-weaving cloth through carding.
2. method according to claim 1, wherein, the extruded velocity of prezenta spinning solution is 0.1-50g/min, is preferably 0.1-10g/min.
3. method according to claim 1, wherein, the length of air bath is that 0.05-2m is long, is preferably 0.2-1m.
4. method according to claim 1, wherein, the speed of conveyer belt is 5-50m/min, is preferably 5-20m/min.
5. method according to claim 1, wherein, coagulation bath composition is for containing 40-45% (NH
4)
2SO
410% H
2SO
4Solution.
6. method according to claim 1, wherein, the temperature of coagulating bath is 30-50 ℃.
7. method according to claim 1, wherein, the spray rate of coagulating bath is 0.05-1L/min, is preferably 0.1-0.5L/min.
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| CN2012100077076A CN102560902A (en) | 2012-01-12 | 2012-01-12 | Method for producing viscose cellulose spun-laid nonwoven |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105518197A (en) * | 2013-09-03 | 2016-04-20 | 3M创新有限公司 | Melt-spinning process, melt-spun nonwoven fibrous webs and related filtration media |
| CN106551423A (en) * | 2016-12-02 | 2017-04-05 | 武汉纺织大学 | A kind of anion melt-blown micro fibre cigarette filter tip material and preparation method thereof |
| CN106723333A (en) * | 2016-12-02 | 2017-05-31 | 武汉纺织大学 | A kind of electret superfine fibre cigarette filter tip material and preparation method thereof |
| CN108149387A (en) * | 2018-01-17 | 2018-06-12 | 青岛大学 | A kind of hydrogel filament mask substrate |
| CN109277002A (en) * | 2018-09-11 | 2019-01-29 | 碧菲分离膜（大连）有限公司 | A kind of manufacturing equipment and technique of modularization ultrafiltration membrane |
| CN110458809A (en) * | 2019-07-16 | 2019-11-15 | 西安工程大学 | A kind of yarn evenness detection method based on sub-pixel edge detection |
| WO2019237466A1 (en) * | 2018-06-12 | 2019-12-19 | 江苏金太阳纺织科技股份有限公司 | Method for preparing regenerated cellulose fiber dyeable with natural dye |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105518197A (en) * | 2013-09-03 | 2016-04-20 | 3M创新有限公司 | Melt-spinning process, melt-spun nonwoven fibrous webs and related filtration media |
| CN106551423A (en) * | 2016-12-02 | 2017-04-05 | 武汉纺织大学 | A kind of anion melt-blown micro fibre cigarette filter tip material and preparation method thereof |
| CN106723333A (en) * | 2016-12-02 | 2017-05-31 | 武汉纺织大学 | A kind of electret superfine fibre cigarette filter tip material and preparation method thereof |
| CN106551423B (en) * | 2016-12-02 | 2020-01-17 | 武汉纺织大学 | Negative ion melt-blown superfine fiber cigarette filter tip material and preparation method thereof |
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| CN109277002A (en) * | 2018-09-11 | 2019-01-29 | 碧菲分离膜（大连）有限公司 | A kind of manufacturing equipment and technique of modularization ultrafiltration membrane |
| CN109277002B (en) * | 2018-09-11 | 2021-07-20 | 碧菲分离膜（大连）有限公司 | Manufacturing equipment and process of modular ultrafiltration membrane |
| CN110458809A (en) * | 2019-07-16 | 2019-11-15 | 西安工程大学 | A kind of yarn evenness detection method based on sub-pixel edge detection |
| CN110458809B (en) * | 2019-07-16 | 2020-11-17 | 西安工程大学 | Yarn evenness detection method based on sub-pixel edge detection |
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Application publication date: 20120711 |