CN106149440B - To discard the method and purposes that coir fibre prepares sub-micron spiral fiber - Google Patents

To discard the method and purposes that coir fibre prepares sub-micron spiral fiber Download PDF

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CN106149440B
CN106149440B CN201610675377.6A CN201610675377A CN106149440B CN 106149440 B CN106149440 B CN 106149440B CN 201610675377 A CN201610675377 A CN 201610675377A CN 106149440 B CN106149440 B CN 106149440B
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fiber
sub
coir fibre
spiral fiber
micron
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CN106149440A (en
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于伟东
刘洪玲
韦童
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Donghua University
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Donghua University
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/001—Modification of pulp properties
    • D21C9/007—Modification of pulp properties by mechanical or physical means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

The present invention provides a kind of to discard the method that coir fibre prepares sub-micron spiral fiber, it is characterised in that including：Clean coir fibre is added in the NaOH solution that concentration is 6~12g/L, 10~60min is presoaked at 60~98 DEG C, after stirring when simultaneously synchronous ultrasonic concussion 0.2~2 is small, repeated extrusion dehydration and be washed with water 1~3 time, obtain coir fibre net of wadding；Use roller to group extrude de- liquid and multistage drafting and handle making unicellular pipe fiber be launched into sub-micron spiral fiber coir fibre net of wadding, be washed with water, it is in alkalescence~neutrality to make washing lotion, dry, obtains sub-micron spiral fiber flco.Gained sub-micron spiral fiber can be directly used for the preparation of high-elastic, high fibrous lofted film and be used as filter membrane or bio-medical material；Or increasing bullet for cellulose matrix, enhancing and prepare pure cellulose elastic composite film；Or prepare elastic composite film for increasing bullet, strengthening other high polymer matrix；Or high-elastic, high bulk fabric is made with other fiber blend resultant yarns.

Description

To discard the method and purposes that coir fibre prepares sub-micron spiral fiber
Technical field
It is particularly a kind of to utilize the present invention relates to a kind of method that sub-micron spiral fiber is prepared from discarded coir fibre Lye separation-mechanical commutation draft method method that drawing-off prepares sub-micron spiral fiber from coconut husk unicellular pipe fiber.
Background technology
Cellulose is inexhaustible, nexhaustible, green, the free of contamination renewable resource of nature, is given birth to every year on the earth Long plant cellulose is up to several hundred million tons, has exceeded existing petroleum total reserve, but utilization is very little.The overwhelming majority is nature Degrade and as fuel combustion, this inherently a kind of pollution.It is reported that lost as caused by environmental pollution and ecological disruption Account for the 15% of GDP total values, it means that while being 9% economic growth, while being 15% loss late.In human society face Face natural resources shortage, energy crisis, environmental pollution when problems, plant resources as widely distributed, abundance on the earth, The fibre resources of sustainable use, have huge developing and utilizingpotentiality, are subject to global most attention, and become and can hold One of the utilization of continuous resource and new material and developing direction.And extraction prepares nano-cellulose fibril as opening up from plant fiber A kind of approach of fibre resources is opened up, obtains the extensive concern of people.
Coconut is one of main woody oleiferous plants crop in torrid areas, Hainan Di Shu subtropical zones and torrid areas, coconut money Source very abundant.Coconut one can produce fruit every year, and production fruit peak period is September to January next year, and production fruit long lifespan was up to 80 years.Every plant of coconut palm Set the average annual output fruit 50~200 before 80 years age of trees.Hainan cultivation cocoanut tree history 2000 existing, until after liberation Just start large-scale planting.Equal yield accounts for the 99% of national total output up to 2.2~2.4 hundred million now.As coconut industry Adjunct --- coir fibre, if each coconut production coir fibre 200g/, the annual coir fibre resource in Hainan Province is reachable 4.4~4.8 ten thousand tons.
Coir fibre separates from coconut husk, cleans, removes after hide glue the native cellulose fibre that obtains, has the toughness strong, anti- The characteristic such as damp, ventilative, antibacterial.Current main application has cushion, rope, brush, indoor decoration (ethnic group or the foreigner Can be made with it variously-shaped disposed within), preparing active carbon, fuel etc., be also taken as discarded object natural degradation or burning.As Weaving is mat, carpet, rope, net, doormat etc. with coir fibre major product.However, all these applications and product are all It is with coir fibre manufactured textile and application in itself.
In addition to the direct textile applications of coir fibre, the more nanometer fibril for being concerned with native cellulose fibre of people It is prepared by extraction.Due to micro- fibril in native cellulose fibre and the fine both less than 50nm, and crystallinity is very high of base, therefore also known as Nano-cellulose whisker.But present invention is primarily concerned with the separation and Extraction of unicellular tubular fiber in coir fibre (abbreviation pipe fiber) Technology of preparing.Research report in this regard, up to the present has no relevant report, and simply in the structural research of coir fibre In stated.Coir fibre is studied as an entirety.As S.Renouard et al. pays close attention to ultrasonication to not Congener cellulose fibre degradation property influences, test coir fibre is more sensitive to ultrasonic response, be easy to the report of degraded Road (Sullivan Renouard, Christophe Hano et.al.Characterization of ultrasonic on Coil, flax and hemp fibers.Materials Letters, 2014,129：137-141) it is intended merely to prove ultrasound Ripple is not directed to the separation of coir fibre middle pipe fiber to the separated effect of different cellulose fibres.It is not directed at all therein Helicoidal fiber.L.Q.N.Tran et al. obtains the coir fibre of expansion by the way of mechanical extraction and hot-water soak, makes Section morphology of the pipe fiber in coir fibre becomes apparent from, and thus have studied the diameter of coconut husk pipe fiber, cross section and And change and possible length (L.Q.N.Tian, the T.Nguyen Minth of the diameter of pipe fiber et.al.Investigation of microstructure and tensile properties of porous natural coil fibre for use in composite materials.Industrial Crops and Products.2015,65：437-445), it is not directed to pipe fiber separation.Obviously, these are all by electromicroscopic photograph sighting tube The size and form of fiber, fail to from coir fibre separate pipe fiber one by one, more without being obtained by drafting method Sub-micron thickness such as the crystal zone fiber of spring structure.
The content of the invention
It is an object of the invention to propose and implement a kind of side that sub-micron spiral fiber is prepared from discarded coir fibre Method, to obtain the superlastic fiber thinner, more soft, longer than pipe fiber.And since its draw ratio is more than 103, therefore can be straight Connect for spinning.Obtained sub-micron spiral fiber elasticity is good, can be directly used for high-elastic, high fibrous lofted film preparation or with High-elastic, high bulk fabric is made in other fiber blend resultant yarns.
In order to achieve the above object, present invention employs following technical solution：
A kind of method that sub-micron spiral fiber is prepared with discarded coir fibre, it is characterised in that including：
The first step：By discarded coir fibre shredding, coma is obtained, the coma of gained is subjected to kiering, washs and squeezes Pressure removes water, obtains clean coir fibre；
Second step：Clean coir fibre obtained by the first step is added in the NaOH solution that concentration is 6~12g/L, Gu Liquid weight ratio is 1: 10~1: 20, when 10~60min, stirring and small synchronous ultrasonic concussion 0.2~2 are presoaked at 60~98 DEG C Afterwards, circulation carries out extrusion dehydration and is washed with water 1~3 time, obtains coir fibre net of wadding；
3rd step：Roller is used to group extrude de- liquid and multistage drafting and handle making unicellular pipe coir fibre net of wadding Fiber further separates and makes spiral crystal zone splitting in its tube wall and be launched into the spiral fibre of sub-micron under multistage drafting effect Dimension, is washed with water, and the extruding, which takes off liquid and multistage drafting processing and circulation is washed with water, to be carried out 1~3 time, makes washing lotion in micro- Alkalescence~neutral, it is dry, obtain sub-micron spiral fiber flco.
Preferably, the kiering in the first step, washing and extruding go water circulation to carry out, and cycle-index is 1~3 time.
Preferably, the kiering is when kiering 0.2~2 is small in 60~98 DEG C of water by coma.
It is highly preferred that trough washery is washed or changed to the washing to discharge water.
Preferably, the mixing speed of the stirring in the second step and synchronous ultrasonic concussion is 400-1000rpm, ultrasound For wave power in 100W~800W, the ultrasonic oscillation is batch process, often shake 10sec~3min after pause 20sec~ 6min。
Preferably, the roller is made of group 3~5 pairs of rollers, and described 3~5 pairs of rollers form 2~4 grades of drawing-offs Area.
Preferably, the roller is 4~12 times to the total draft multiple of group.The total draft multiple refers to last defeated Go out roller to linear velocity and most preceding input roller is to the ratio between linear velocity.The extruding take off liquid and multistage drafting processing can make it is slender It is extruded, pulls, cleaving, being launched into sub-micron spiral fiber born of the same parents' pipe fiber energy multistage uniform, and sloughs original lye.
Preferably, the sub-micron spiral fiber is the spiral fiber that is made of ribbon crystal, the band The thickness of shape crystal is in 0.20~1.1 μm, width at 1.8~6.3 μm.
Preferably, the discarded coir fibre refers to discard fiber in natural coconut husk, the leftover bits and pieces in textile mills' processing Or production clout and with the pure coir fibre product abandoned.
Present invention also offers directly preparing tunica fibrosa, conduct using the sub-micron spiral fiber prepared by the above method The increasing of cellulose matrix plays reinforcing material and prepares pure cellulose composite membrane, the increasing bullet reinforcing material system as other high polymer matrix For composite membrane or as the purposes prepared with other fiber blend resultant yarns in fabric.
The unicellular pipe isolated in the coir fibre that unicellular pipe fiber of the present invention refers to be made of many cells Shape fiber.
Alkalescence of the present invention refers to that pH is 8-9.
The present invention provides a kind of method that sub-micron spiral fiber is prepared from discarded coir fibre, particularly a kind of profit Separated with lye-mechanical commutation draft method stretches the method for preparing sub-micron spiral fiber from the unicellular pipe fiber of coconut husk.The present invention Basic principle be targeting be swollen and expand with dissolving the interfibrous cytoplasm of unicellular pipe and being impacted with ultrasonic wave microbubble Act on greatly with reference to and it is efficient, it is low damage ground disintegrated cell interstitial and spiral interzone interstitial, and combine mechanical agitation shear Act on and accelerate the interfibrous dissociation of coconut husk pipe and form unicellular pipe fiber, then the spiral shell in pipe fiber tube wall is made by mechanical stretch Rotation crystal zone is launched into sub-micron spiral fiber.This will be helpful to the deep processing of coir fibre and what is become more meticulous recycle, and is useless Abandon coir fibre and provide new way in warming and high-elasticity fiber application.It is the shortcut of the sustainable development of cellulose fibre resource With efficient method.
Compared with prior art, the beneficial effects of the invention are as follows：
1) for unicellular pipe fiber through the deployable spiral fiber into sub-micron thickness of drawing-off, the elastic elongation of the fiber is big, It is 30 times of a pitch pipe fibre length up to shape is stretched, therefore the draw ratio of fiber becomes very big, up to 103~104, completely may be used To be used directly to spin；
2) expansion of pipe fiber makes fiber become more elongated, more soft, more flexible sub-micron spiral fiber, can be used for The increasing bullet of complex yarn and enhancing；
3) it is a kind of native cellulose fibre of brand-new submicron-scale, can be directly used for high-elastic, high fibrous lofted film Preparation and be used as filter membrane or bio-medical material；Or increasing bullet for cellulose matrix, enhancing and prepare pure cellulose bullet Property composite membrane；Or prepare elastic composite film for increasing bullet, strengthening other high polymer matrix；Or it is made with other fiber blend resultant yarns High-elastic, high bulk fabric.
Brief description of the drawings
Fig. 1 is light microscope (OM) photo of coconut husk sub-micron spiral fiber；
Fig. 2 is scanning electron microscope (SEM) photo of sub-micron spiral fiber.
Embodiment
With reference to specific embodiment, the present invention is further explained.It is to be understood that these embodiments are merely to illustrate the present invention Rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, people in the art Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited Scope.
Embodiment 1
A kind of method for preparing sub-micron spiral fiber with discarded coir fibre, concretely comprises the following steps：
(1) shredding removal of impurities, kiering swelling and cleaning impurity elimination：By machinery strike, rub and pull drawing and will discard natural coconut husk Middle fiber opening, removes particulate contaminant, obtains loose coma；The coma of gained is subjected to kiering, washing and is extruded Water is removed, the kiering, washing and extruding are gone the specific steps of water to include coma being placed in beaker, be totally submerged in water In, be placed in 60 DEG C of water-baths carry out kiering swelling 2 it is small when, kiering while, is stirred with the rotating speed of 800rpm, is used after kiering Multistage roller device carries out extruding to coma and removes water, is washed with water, then extrude water；Kiering, washing and the extruding is gone Water circulation carries out 2 times, and clean coconut husk of the fiber surface without visible adhesion impurity but hygrometric state except matrix between fiber, is obtained to remove Fiber；
(2) dipping by lye swelling is separated with synchronous ultrasonic concussion：The clean coir fibre that step (1) obtains is added to Concentration is in the NaOH solution of 6g/L, and solid-liquid weight ratio is 1: 20, is placed in the water-bath that temperature is 80 DEG C, presoaks 60min, stir Mix and when synchronous ultrasonic concussion 2 is small, mixing speed 800rpm, ultrasonic power is in 600W, the ultrasonic oscillation Batch process, often pause 1min after concussion 3min, and circulation carries out extrusion dehydration and simultaneously enters Rinsing Area washing 2 times, and it is in micro- to make washing lotion Alkalescence, obtains hygrometric state coir fibre net of wadding, and wherein most to be swollen separated unicellular pipe fiber, for many cells glue by small part Pipe fiber even.
(3) extrude de- liquid and be pulled into sub-micron spiral fiber：Coir fibre net of wadding extrudes group using roller De- liquid and multistage drafting processing makes unicellular pipe fiber further separate and spiral crystal zone in its tube wall is cleaved and is led in multistage Sub-micron spiral fiber is launched under the effect of stretching, the sub-micron spiral fiber is spiral to be made of ribbon crystal Fiber, as depicted in figs. 1 and 2, its structure are similar to spring.Dried afterwards, clear water washing, the roller is to group by 3 Roller is formed, described 3 pairs of rollers form 2 grades of draw zones, and total drafting multiple is 5 times, and the extruding takes off liquid and multistage Drawing-off is handled and drying, clear water wash cycle carry out 2 times totally, and it is in alkalescence~neutrality to make washing lotion, and 80 DEG C of drying, obtain milky white Color sub-micron spiral fiber flco.
Coconut husk tubular fiber manufactured in the present embodiment uses scanning electron microscope test, can obtain the tubular diameter of fiber For 6.2~16.8 μm, draw ratio is 65~160.The 2.2~6.3 μm wide of ribbon crystal (crystal zone), 0.5~1.1 μm of thickness, stretch Length/width is than 1.7 × 103~3.2 × 104.The helical form natural length being unfolded after drawing is 360~970 μm.
Embodiment 2
A kind of method for preparing sub-micron spiral fiber with discarded coir fibre, concretely comprises the following steps：
(1) shredding removal of impurities, kiering swelling and cleaning impurity elimination：By machinery strike, rub and pull drawing and will discard natural coconut husk Middle fiber opening, removes particulate contaminant, obtains loose coma；The coma of gained is subjected to kiering, washing and is extruded Water is removed, the kiering, washing and extruding are gone the specific steps of water to include coma being placed in beaker, be totally submerged in water In, be placed in 80 DEG C of water-baths carry out kiering swelling 1.5 it is small when, kiering while, is stirred with the rotating speed of 600rpm, is adopted after kiering Extruding is carried out to coma with multistage roller device and removes water, is washed with water, then extrude water；The kiering, washing simultaneously extrude Go water circulation to carry out 3 times, obtain clean coir fibre of the fiber surface without visible adhesion impurity but hygrometric state；
(2) dipping by lye swelling is separated with synchronous ultrasonic concussion：The clean coir fibre that step (1) obtains is added to Concentration is in the NaOH solution of 8g/L, and solid-liquid weight ratio is 1: 15, is placed in the water-bath that temperature is 80 DEG C, presoaks 40min, stir Mix and when synchronous ultrasonic concussion 2 is small, mixing speed 600rpm, ultrasonic power is in 400W, the ultrasonic oscillation Batch process, often pause 3min after concussion 2min, and circulation carries out extrusion dehydration and simultaneously enters Rinsing Area washing 2 times, and it is in micro- to make washing lotion Alkalescence, obtains hygrometric state coir fibre net of wadding, and wherein most to be swollen separated unicellular pipe fiber, for many cells glue by small part Pipe fiber even.
(3) extrude de- liquid and be pulled into sub-micron spiral fiber：Coir fibre net of wadding extrudes group using roller De- liquid and multistage drafting processing makes unicellular pipe fiber further separate and spiral crystal zone in its tube wall is cleaved and is led in multistage Sub-micron spiral fiber is launched under the effect of stretching, the sub-micron spiral fiber is spiral to be made of ribbon crystal Fiber, its structure are similar to spring.Dried afterwards, clear water washing, the roller is made of group 4 pairs of rollers, described 4 pairs of rollers form 3 grades of draw zones, total drafting multiple be 4 times, the extruding take off liquid and multistage drafting processing and get rid of Dry, clear water wash cycle carries out 3 times totally, and it is in alkalescence~neutrality to make washing lotion, and 80 DEG C of drying, obtain the spiral fibre of milky sub-micron Tie up flco.
Coconut husk tubular fiber prepared by present embodiment uses scanning electron microscope test, and the tubulose that can obtain fiber is straight Footpath is 5.4~15.1 μm, and draw ratio is 80~170.The 1.9~5.0 μm wide of ribbon crystal (crystal zone), 0.2~0.9 μm of thickness, stretch Straight length/width is than 1.2 × 103~2.4 × 104.The helical form natural length being unfolded after drawing is 320~960 μm.
Embodiment 3
A kind of method for preparing sub-micron spiral fiber with discarded coir fibre, concretely comprises the following steps：
(1) shredding removal of impurities, kiering swelling and cleaning impurity elimination：By machinery strike, rub and pull drawing and will discard natural coconut husk Middle fiber opening, removes particulate contaminant, obtains loose coma；The coma of gained is subjected to kiering, washing and is extruded Water is removed, the kiering, washing and extruding are gone the specific steps of water to include coma being placed in beaker, be totally submerged in water In, be placed in 98 DEG C of water-baths carry out kiering swelling 1 it is small when, kiering while, is stirred with the rotating speed of 400rpm, is used after kiering Multistage roller device carries out extruding to coma and removes water, is washed with water, then extrude water；Kiering, washing and the extruding is gone Water circulation carries out 3 times, obtains clean coir fibre of the fiber surface without visible adhesion impurity but hygrometric state；
(2) dipping by lye swelling is separated with synchronous ultrasonic concussion：The clean coir fibre that step (1) obtains is added to Concentration is in the NaOH solution of 10g/L, and solid-liquid weight ratio is 1: 10, is placed in the water-bath that temperature is 80 DEG C, presoaks 20min, When stirring and small synchronous ultrasonic concussion 2, mixing speed 400rpm, ultrasonic power is in 300W, the ultrasonic oscillation For batch process, the 4min that pauses after 3min is often shaken, circulation carries out extrusion dehydration and simultaneously enter Rinsing Area washing 2 times, makes the washing lotion be in Alkalescence, obtains hygrometric state coir fibre net of wadding, for wherein most to be swollen separated unicellular pipe fiber, small part is many cells The pipe fiber of adhesion.
(3) extrude de- liquid and be pulled into sub-micron spiral fiber：Coir fibre net of wadding extrudes group using roller De- liquid and multistage drafting processing makes unicellular pipe fiber further separate and spiral crystal zone in its tube wall is cleaved and is led in multistage Sub-micron spiral fiber is launched under the effect of stretching, the sub-micron spiral fiber is spiral to be made of ribbon crystal Fiber, its structure are similar to spring.Dried afterwards, clear water washing, the roller is made of group 5 pairs of rollers, described 5 pairs of rollers form 4 grades of draw zones, total drafting multiple be 7.8 times, the extruding take off liquid and multistage drafting processing and get rid of Dry, clear water wash cycle carries out 3 times totally, and it is in alkalescence~neutrality to make washing lotion, and 80 DEG C of drying, obtain the spiral fibre of milky sub-micron Tie up flco.
Coconut husk tubular fiber prepared by present embodiment uses scanning electron microscope test, and the tubulose that can obtain fiber is straight Footpath is 4.6~11.3 μm, and draw ratio is 85~180.The 1.8~3.9 μm wide of ribbon crystal (crystal zone), 0.2~0.58 μm of thickness, stretch Straight length/width is than 1.5 × 103~4.8 × 104.The helical form natural length being unfolded after drawing is 390~990 μm.

Claims (9)

  1. A kind of 1. method that sub-micron spiral fiber is prepared with discarded coir fibre, it is characterised in that including：
    The first step：By discarded coir fibre shredding, coma is obtained, the coma of gained is carried out kiering, washing and extruding goes Water, obtains clean coir fibre；
    Second step：Clean coir fibre obtained by the first step is added in the NaOH solution that concentration is 6~12g/L, solid-liquid weight Measure than being 1: 10~1: 20,10~60min is presoaked at 60~98 DEG C, after stirring when simultaneously synchronous ultrasonic concussion 0.2~2 is small, Circulation carries out extrusion dehydration and is washed with water 1~3 time, obtains coir fibre net of wadding；
    3rd step：Roller is used to group extrude de- liquid and multistage drafting and handle making unicellular pipe fiber coir fibre net of wadding Further separate and make spiral crystal zone splitting in its tube wall and be launched into sub-micron spiral fiber under multistage drafting effect, use Water washing, the extruding, which takes off liquid and multistage drafting processing and circulation is washed with water, to be carried out 1~3 time, and it is in alkalescence to make washing lotion ~neutral, it is dry, obtain sub-micron spiral fiber flco.
  2. 2. the method that sub-micron spiral fiber is prepared with discarded coir fibre as claimed in claim 1, it is characterised in that described The first step in kiering, washing and extrude go water circulation carry out, cycle-index be 1~3 time.
  3. 3. the method that sub-micron spiral fiber is prepared with discarded coir fibre as claimed in claim 2, it is characterised in that described Kiering be by coma kiering 0.2~2 is small in 60~98 DEG C of water when.
  4. 4. the method that sub-micron spiral fiber is prepared with discarded coir fibre as claimed in claim 2, it is characterised in that described The mixing speed of stirring and synchronous ultrasonic concussion in second step is 400-1000rpm, ultrasonic power in 100W~800W, The ultrasonic oscillation is batch process, often shakes pause 20sec~6min after 10sec~3min.
  5. 5. the method that sub-micron spiral fiber is prepared with discarded coir fibre as claimed in claim 1, it is characterised in that described Roller group is made of 3~5 pairs of rollers, described 3~5 pairs of rollers form 2~4 grades of draw zones.
  6. 6. the method that sub-micron spiral fiber is prepared with discarded coir fibre as claimed in claim 1, it is characterised in that described Roller be 4~12 times to the total draft multiple of group.
  7. 7. the method that sub-micron spiral fiber is prepared with discarded coir fibre as claimed in claim 1, it is characterised in that described Sub-micron spiral fiber be the spiral fiber that is made of ribbon crystal, the thickness of the ribbon crystal 0.20~ 1.1 μm, width is at 1.8~6.3 μm.
  8. 8. the method that sub-micron spiral fiber is prepared with discarded coir fibre as claimed in claim 1, it is characterised in that described Discarded coir fibre refer to discard fiber in natural coconut husk, the leftover bits and pieces in textile mills' processing or production clout and pure with what is abandoned Coir fibre product.
  9. 9. being prepared with discarding coir fibre prepared by the method for sub-micron spiral fiber any one of claim 1-8 Sub-micron spiral fiber directly prepare tunica fibrosa, that the increasing bullet reinforcing material as cellulose matrix prepares pure cellulose is compound Film, the increasing bullet reinforcing material as other high polymer matrix prepare composite membrane or prepare fabric as with other fiber blend resultant yarns In purposes.
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