CN102650081A - Color fixed island composite short fiber and preparation method thereof - Google Patents
Color fixed island composite short fiber and preparation method thereof Download PDFInfo
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- CN102650081A CN102650081A CN2011100471082A CN201110047108A CN102650081A CN 102650081 A CN102650081 A CN 102650081A CN 2011100471082 A CN2011100471082 A CN 2011100471082A CN 201110047108 A CN201110047108 A CN 201110047108A CN 102650081 A CN102650081 A CN 102650081A
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- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 25
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 25
- 229920001778 nylon Polymers 0.000 claims abstract description 23
- 239000004677 Nylon Substances 0.000 claims abstract description 21
- 229920002292 Nylon 6 Polymers 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000009987 spinning Methods 0.000 claims description 60
- 239000003921 oil Substances 0.000 claims description 32
- 238000009998 heat setting Methods 0.000 claims description 16
- 239000007864 aqueous solution Substances 0.000 claims description 14
- 230000036760 body temperature Effects 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 14
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- 238000010438 heat treatment Methods 0.000 claims description 13
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- 239000004595 color masterbatch Substances 0.000 claims description 11
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 11
- 230000004927 fusion Effects 0.000 claims description 9
- 239000000049 pigment Substances 0.000 claims description 8
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- 238000001816 cooling Methods 0.000 claims description 7
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- -1 polypropylene Polymers 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 5
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- 238000010008 shearing Methods 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 238000004043 dyeing Methods 0.000 abstract description 12
- 239000002649 leather substitute Substances 0.000 abstract description 11
- 239000004594 Masterbatch (MB) Substances 0.000 abstract description 6
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Landscapes
- Multicomponent Fibers (AREA)
Abstract
The invention provides a color fixed island composite short fiber and a preparation method thereof. The color fixed island composite short fiber comprises the following components by weight: 25-60 percent of low density polyethylene, 30-70 percent of nylon (6), 0.01-25 percent of nylon base coloring master batch and 0-4 percent of compatilizer. Compared with the prior art, the number of the islands of the color fixed island composite short fiber is fixed, as well as the size and the distribution of the short fiber are regular; color super-fine fiber synthetic leather prepared by adopting the preparation method has the advantages of bright and uniform color, high color fastness, no color difference between different batches, uniform carding, strong woolen sensation, high abrasion resistance, easiness in removing of dust after leather abrading, low probability of dust dropping during friction and the like; and besides, high energy consumption and high pollution dyeing process is simplified, and the preparation cost is reduced to a great extent.
Description
Technical field
The present invention relates to a kind of island composite short fiber of deciding, relate in particular to a kind of colour and decide island composite nylon staple fibre and production method thereof.
Background technology
Domestic existing nylon based coloured ultrathin fiber synthetic leather generally is that employing nylon is that island component, polyethylene are that sea component prepares sea-island staple fiber; Utilize indefinite island blend melt spinning method or decide the island composite spinning method and make after the fabric of island-in-sea type staple fibre that fiber number is 3～8dtex; Become the high-density non-woven fabrics of three-dimensional net structure through processing complexings such as acupunctures; Filling has the polyurethane of microcellular structure, open fibre through decrement and obtain the bundle superfine fibre polyurethane synthetic leather base cloth, with base cloth carry out split, the mill skin after; Re-use dyestuff and dye, then through oil, arrangement obtains the coloured ultrathin fiber synthetic leather after oven dry, veneer etc.
Because synthetic leather base cloth is to be made up of nylon fiber and two kinds of components of polyurethane resin; The nylon fiber fiber number that decrement is opened behind the fibre can reach below the 0.1dtex; Specific area is much higher than general fibre, and superfine fibre thickness after decrement that indefinite island blend melt spinning method is produced is inhomogeneous, mainly selects neutrality or acid dyeing in the dyeing course for use; Used dyestuff and dyeing are complicated; The dyeing temperature interdependence is poor, unstable product quality, and process that the colored synthetic leather colour rendering of superfine fibre is poor, level-dyeing property is poor, dyefastness is poor; Adopt and to decide the island composite spinning method (referring to the patent of invention prospectus: a kind of island ultrafine fiber, Synthetic Leather and base cloth thereof; And preparation method; Application number: 201019063013.2, publication number: even thickness after superfine fibre decrement CN 101787586A), the synthetic leather that makes fluffing homogeneous, dye-uptake is better, velvet is strong, Color is better; But still need dyeing process, product to have the problems such as aberration between different batches; And nylon shrinks easily during high temperature, and dyeing back feel is relatively poor, must use a large amount of finishing agents to recover its soft hand feeling, thereby increase production cost.In addition, in dyeing course, need to consume the big water gaging and the energy, the wastewater treatment difficulty after the dyeing, the sewage environmental pollution is more serious.
Patent (ZL200510110717.2 is also arranged; The manufacturing approach of coloured ultrathin fiber nylon polyurethane suede leather) is employed in the spinning process and directly adds Masterbatch composite fibre is made look; The impregnation wet polyurethane similar in dipping process then with fiber color; Make the base cloth of color homogeneous at last, simplified dyeing process, improving COLOR FASTNESS.But; This patent adopts indefinite island blend melt spinning method to produce sea-island staple fiber; The quantity on island differs, fiber number differs, length is different; Some shortcomings that indefinite island synthetic leather therefore still can occur, as: color is bright-coloured inadequately, behind the mill skin dust the fluffing effect is not bad behind easy-clear, the mill skin, velvet is not strong etc.
Summary of the invention
The purpose of this invention is to provide a kind of colour and decide island composite superfine nylon short fibre and production method thereof,, satisfy on the market high-level requirement the coloured ultrathin fiber Synthetic Leather to overcome the above-mentioned defective that prior art exists.
Colour of the present invention decide the island composite short fiber be a kind of be that sea component, polycaprolactam (nylon 6) and nylon based color master-batch are the figured sea-island staple fiber of island component with the low density polyethylene (LDPE), the weight percentage of each component is:
Add compatilizer, can reduce the nylon and the two-phase interface tension force of low density polyethylene (LDPE) after painted, the raising spinnability.
Preferably, described colour is decided the weight percentage of island each component of composite short fiber and is:
Each percentages of ingredients sum is 100%.
The island number that described colour is decided the island composite short fiber is 37;
The quantity that is defined as island in the single islands-in-sea type fibre cross section (decentralized photo nylon 6) of island number, quantity and the distribution situation that can under high-power microscope, observe the island.
The density of said low density polyethylene (LDPE) is 0.910～0.925g/cm
3, melt index is 40～65g/10min, 104～126 ℃ of fusing points;
The density of described polycaprolactam (nylon 6) is 1.12～1.14g/cm
3, relative viscosity is 2.25～2.75;
Described nylon based color master-batch is a kind ofly evenly to be attached among the nylon 6 aggregation that granulation then makes to the pigment of super quantity; Relative viscosity is 2.25～2.75; Wherein, The weight content of pigment is 15%～45%, can directly adopt the commercially available prod, and for example the Zhangjiagang enlightening is liked the product of biochemical worker Co., Ltd;
Described compatilizer is selected from one or more in polyolefin grafted maleic anhydride or the polyolefin graft acrylic acid, can directly adopt the commercially available prod;
Preferably; Described polyolefin grafted maleic anhydride is more than one of polycthylene grafted maleic anhydride (PE-g-MAH) or polypropylene grafted maleic anhydride (PP-g-MAH), and described polyolefin graft acrylic acid is one or more of polycthylene grafted acryhic (PE-g-AA) and polypropylene grafted acrylic acid (PP-g-AA);
A kind of colour of the present invention is decided the production method of island composite superfine nylon short fibre, comprises the steps:
(1) mixture, the sea component low density polyethylene (LDPE) with island component nylon 6, nylon based color master-batch and compatilizer adds storage bin separately respectively; Get into screw extruder separately then respectively; In a screw extruder, but sea component heating, extruding, fusion are become spinning melt A, but in another screw extruder, mixture heated, extruding, the fusion of island component become spinning melt B, after the filtration; But but spinning melt A passes through spinning manifold metering separately with spinning melt B; Get in the same filament spinning component, moment accomplishes and converges at the spinnerets place again, from spinneret orifice ejection melt thread;
The spinning body temperature of described sea component is 120～170 ℃, and the spinning body temperature of island component is 275～295 ℃, and spinning speed is 500～1200m/min;
(2) from the melt thread of spinneret orifice ejection through cooling forming, obtain the fiber of optimal performance index, oil successively then, boundling, the bucket that falls, placed 24～72 hours, eliminate its internal stress;
Used finish is that weight content is the aqueous solution of 6%～8% multicomponent phosphate mineral oil based spinning oil during described oiling, and can adopting Shanghai, safe to win the textile auxiliary Co., Ltd trade mark be the product of TS-909;
The described barrel speed that falls is 500～1200m/min;
(3) fibre bundle that step (2) is obtained passes through the creel boundling, and the tow behind the boundling gets into first drawing machine, gets into second drawing machine through oil bath then;
The dawn number of tow was 20～1,600,000 dawn behind the described boundling;
The first drawing roller speed, 40～80m/min, the second drawing roller speed, 80～250m/min, 2～4.5 times of drafting multiples;
Finish in the oil bath is the aqueous solution of 6%～8% multicomponent phosphate mineral oil based spinning oil, and temperature is 35～64 ℃;
(4) tow after drawing-off gets into crimping machine through folded silk machine, curls, and sends in the relaxation heat setting machine again and finalizes the design;
Described relaxation heat setting machine adopts the segmentation heating, and temperature is 80～30 ℃ from high to low.
(5) tow behind the relaxation heat setting is cut off through cutting machine, can obtain colour of the present invention and decide the island composite short fiber.
Described cutting machine speed is 30～80m/min, and shearing length is 38～64mm;
Compared with prior art, colour of the present invention is decided island fixed amount, size and the distribution rule of island composite short fiber, and the coloured ultrathin fiber synthetic leather that utilizes it to make is not only bright in luster, color homogeneous, COLOR FASTNESS high; Almost there is not aberration between different batches; And the fluffing homogeneous, velvet is strong, ABRASION RESISTANCE good, the mill skin after dust remove easily, be difficult for dry linting dirt etc. in the friction process; Simplify the dyeing process of high energy consumption, high pollution simultaneously, greatly reduced production cost.
The specific embodiment
Below in conjunction with specific embodiment the present invention is done further description, will help to understand the present invention, but can not limit content of the present invention through the following example.
Embodiment 1～5 raw material that adopts: low density polyethylene (LDPE): SINOPEC Beijing Yanshan Company produces; Nylon 6 slice: newly understand Mei Da-DSM nylon chips Co., Ltd and produce; The nylon based color master-batch: the Zhangjiagang enlightening likes that biochemical worker Co., Ltd produces.
Embodiment 1
With nylon 6 slice, nylon based color master-batch (brown master batch; Pigment weight content 30%) and polycthylene grafted acryhic (PE-g-AA; Shenyang Jin Siwei rubber and plastic Science and Technology Ltd.) by weight being that 70: 4: 1 mixing backs add island component feed bin, the low density polyethylene (LDPE) section is added the sea component feed bin.
But screw extruder heating, extruding, fusion that the material in the feed bin is added separately become spinning melt; According to the weight ratio of island component and sea component is respectively metering after to carry out spinning at 75: 25 (spinning body temperature of sea component is 150 ℃; The spinning body temperature of island component is 295 ℃, and spinning speed is 700m/min), carry out the strand cooling forming from the melt thread of spinneret orifice ejection through encircling blowing; Cooled tow oils through a pair of oiling roller; Boundling, the bucket (barrel speed that falls is 700m/min) that falls are stored in the fiber barrel then, and used finish is: weight concentration is the aqueous solution of 6% multicomponent phosphate mineral oil based spinning oil.
Through the creel boundling, the dawn number of tow was 200,000 dawn behind the boundling with the tow in 5 fiber barrels of having placed after 24 hours; Tow behind the boundling gets into first drawing machine (speed 60m/min), is 50 ℃ finishing bathtray oil bath (aqueous solution of 6% multicomponent phosphate mineral oil based spinning oil) then through excess temperature, gets into second drawing machine (speed 180m/min, drafting multiple are 3) again; Tow after the drawing-off gets into crimping machine through folded silk machine, makes fiber obtain certain crimpness, crimping machine speed 60m/min; Send into (the temperature section heating of relaxation heat setting machine in the relaxation heat setting machine by conveyer then; Temperature is from high to low: 80～30 ℃) typing 15min; Make fiber reach required water capacity; Tow after the drying setting is cut into specific length according to product requirement, can obtains colour of the present invention and decide the island composite short fiber, the island number that described colour is decided the island composite short fiber is 37.
It is that 6dtex, length are 51mm that the colour of gained is decided island composite short fiber filament number, and this fiber is designated as DXW1.
Embodiment 2
With nylon 6 slice, nylon based color master-batch (blue master batch; Pigment weight content 45%) and polypropylene grafted maleic anhydride (PP-g-MAH; Qinhuangdao Ke Ruida macromolecular material Co., Ltd) by weight being to mix the back at 39.2: 0.3: 0.5 to add island component feed bin, low density polyethylene (LDPE) is added the sea component feed bin.But screw extruder heating, extruding, fusion that the material in the feed bin is added separately become spinning melt; According to the weight ratio of island component and sea component is respectively metering after to carry out spinning at 40: 60 (spinning body temperature of sea component is 170 ℃; The spinning body temperature of island component is 285 ℃, and spinning speed is 500m/min), carry out the strand cooling forming from the melt thread of spinneret orifice ejection through encircling blowing; Cooled tow oils through a pair of oiling roller; Boundling, the bucket (barrel speed that falls is 500m/min) that falls are stored in the fiber barrel then, and used finish is: the aqueous solution of 8% multicomponent phosphate mineral oil based spinning oil.
Through the creel boundling, the dawn number of tow was 800,000 dawn behind the boundling with the tow in 20 fiber barrels of having placed after 24 hours; Tow behind the boundling gets into first drawing machine (speed 40m/min), is 35 ℃ finishing bathtray oil bath (aqueous solution of 8% multicomponent phosphate mineral oil based spinning oil) then through excess temperature, gets into second drawing machine (speed 180m/min, drafting multiple are 4.5) again; Tow after the drawing-off gets into crimping machine through folded silk machine, makes fiber obtain certain crimpness, crimping machine speed 60m/min; Send into (the temperature section heating of relaxation heat setting machine in the relaxation heat setting machine by conveyer then; Temperature is from high to low: 80～30 ℃) typing 12min; Make fiber reach required water capacity; Tow after the drying setting is cut into specific length according to product requirement, can obtains colour of the present invention and decide the island composite short fiber.The island number that described colour is decided the island composite short fiber is 37.
It is that 6dtex, length are 51mm that the colour of gained is decided island composite short fiber filament number, and this fiber is designated as DXW2.
Embodiment 3
With nylon 6 slice, nylon based color master-batch (black agglomerate; Pigment weight content 15%) and polycthylene grafted maleic anhydride (PE-g-MAH; Hebei Tian Qi plastic cement Co., Ltd) by weight being to mix the back at 30: 25: 2 to add island component feed bin, low density polyethylene (LDPE) is added the sea component feed bin.But screw extruder heating, extruding, fusion that the material in the feed bin is added separately become spinning melt; According to the weight ratio of island component and sea component is respectively metering after to carry out spinning at 55: 43 (spinning body temperature of sea component is 120 ℃; The spinning body temperature of island component is 295 ℃, and spinning speed is 1200m/min), carry out the strand cooling forming from the melt thread of spinneret orifice ejection through encircling blowing; Cooled tow oils through a pair of oiling roller; Boundling, the bucket (barrel speed that falls is 1200m/min) that falls are stored in the fiber barrel then, and used finish is: the aqueous solution of 6% multicomponent phosphate mineral oil based spinning oil.
Through the creel boundling, the dawn number of tow was 1,600,000 dawn behind the boundling with the tow in 40 fiber barrels of having placed after 24 hours; Tow behind the boundling gets into first drawing machine (speed 80m/min), is 64 ℃ finishing bathtray oil bath (aqueous solution of 6% multicomponent phosphate mineral oil based spinning oil) then through excess temperature, gets into second drawing machine (speed 160m/min, drafting multiple are 2) again; Tow after the drawing-off gets into crimping machine through folded silk machine, makes fiber obtain certain crimpness, crimping machine speed 80m/min; Send into (the temperature section heating of relaxation heat setting machine in the relaxation heat setting machine by conveyer then; Temperature is from high to low: 80～30 ℃) typing 20min; Make fiber reach required water capacity; Tow after the drying setting is cut into specific length according to product requirement, can obtains colour of the present invention and decide the island composite short fiber.The island number that described colour is decided the island composite short fiber is 37.
It is that 4.5dtex, length are 64mm that the colour of gained is decided island composite short fiber filament number, and this fiber is designated as DXW3.
Embodiment 4
Nylon 6 slice and nylon based color master-batch (yellow masterbatch, pigment weight content 35%) by weight being to mix back at 35: 15 to add island component feed bin, are added the sea component feed bin with low density polyethylene (LDPE).But screw extruder heating, extruding, fusion that the material in the feed bin is added separately become spinning melt; According to the weight ratio of island component and sea component is respectively metering after to carry out spinning at 50: 50 (spinning body temperature of sea component is 150 ℃; The spinning body temperature of island component is 275 ℃, and spinning speed is 800m/min), carry out the strand cooling forming from the melt thread of spinneret orifice ejection through encircling blowing; Cooled tow oils through a pair of oiling roller; Boundling, the bucket (barrel speed that falls is 800m/min) that falls are stored in the fiber barrel then, and used finish is: the aqueous solution of 6% multicomponent phosphate mineral oil based spinning oil.
Through the creel boundling, the dawn number of tow was 1,000,000 dawn behind the boundling with the tow in 25 fiber barrels of having placed after 24 hours; Tow behind the boundling gets into first drawing machine (speed 70m/min), is 55 ℃ finishing bathtray oil bath (aqueous solution of 6% multicomponent phosphate mineral oil based spinning oil) then through excess temperature, gets into second drawing machine (speed 250m/min, drafting multiple are 3.57) again; Tow after the drawing-off gets into crimping machine through folded silk machine, makes fiber obtain certain crimpness, crimping machine speed 100m/min; Send into (the temperature section heating of relaxation heat setting machine in the relaxation heat setting machine by conveyer then; Temperature is from high to low: 80～30 ℃) typing 15min; Make fiber reach required water capacity; Tow after the drying setting is cut into specific length according to product requirement, can obtains colour of the present invention and decide the island composite short fiber.The island number that described colour is decided the island composite short fiber is 37.
It is that 5dtex, length are 38mm that the colour of gained is decided island composite short fiber filament number, and this fiber is designated as DXW4.
Embodiment 5
With nylon 6 slice, nylon based color master-batch (brown master batch; Pigment weight content 30%) and polycthylene grafted maleic anhydride (PE-g-MAH; Hebei Tian Qi plastic cement Co., Ltd) by weight being to mix the back at 48: 10: 2 to add island component feed bin, low density polyethylene (LDPE) is added the sea component feed bin.But screw extruder heating, extruding, fusion that the material in the feed bin is added separately become spinning melt; According to the weight ratio of island component and sea component is respectively metering after to carry out spinning at 60: 40 (spinning body temperature of sea component is 160 ℃; The spinning body temperature of island component is 295 ℃, and spinning speed is 800m/min), carry out the strand cooling forming from the melt thread of spinneret orifice ejection through encircling blowing; Cooled tow oils through a pair of oiling roller; Boundling, the bucket (barrel speed that falls is 800m/min) that falls are stored in the fiber barrel then, and used finish is: the aqueous solution of 7% multicomponent phosphate mineral oil based spinning oil.
Through the creel boundling, the dawn number of tow was 1,200,000 dawn behind the boundling with the tow in 30 fiber barrels of having placed after 24 hours; Tow behind the boundling gets into first drawing machine (speed 60m/min), is 50 ℃ finishing bathtray oil bath (aqueous solution of 7% multicomponent phosphate mineral oil based spinning oil) then through excess temperature, gets into second drawing machine (speed 210m/min, drafting multiple are 3.5) again; Tow after the drawing-off gets into crimping machine through folded silk machine, makes fiber obtain certain crimpness, crimping machine speed 70m/min; Send into (the temperature section heating of relaxation heat setting machine in the relaxation heat setting machine by conveyer then; Temperature is from high to low: 80～30 ℃) typing 15min; Make fiber reach required water capacity; Tow after the drying setting is cut into specific length according to product requirement, can obtains colour of the present invention and decide the island composite short fiber.The island number that described colour is decided the island composite short fiber is 37.
It is that 5dtex, length are 51mm that the colour of gained is decided island composite short fiber filament number, and this fiber is designated as DXW5.
The colour that makes among the embodiment 1～5 is decided island composite short fiber DXW1～5; Under high-power microscope, observe the distribution situation on island respectively; By international first-selected isodromicing elongation (CRE) principle; Powerful machine test ultimate strength of employing YG (B) 003A type electronic mono-fiber and elongation at break adopt GB/T6504-2008 test fiber oil content, tabulate as follows:
Claims (13)
1. colour is decided island composite short fiber and production method thereof, it is characterized in that the weight percentage of each component is:
2. colour according to claim 1 is decided island composite short fiber and production method thereof, it is characterized in that, the weight percentage of each component is:
Each percentages of ingredients sum is 100%;
The island number that described colour is decided the island composite short fiber is 37.
3. colour according to claim 1 is decided island composite short fiber and production method thereof, it is characterized in that, the density of said low density polyethylene (LDPE) is 0.910～0.925g/cm
3, melt index is 40～65g/10min, 104～126 ℃ of fusing points.
4. colour according to claim 1 is decided island composite short fiber and production method thereof, it is characterized in that, the density of described polycaprolactam (nylon 6) is 1.12～1.14g/cm
3, relative viscosity is 2.25～2.75.
5. colour according to claim 1 is decided island composite short fiber and production method thereof, it is characterized in that, the relative viscosity of described nylon based color master-batch is 2.25～2.75, and wherein, the weight content of pigment is 15%～45%.
6. decide island composite short fiber and production method thereof according to each described colour of claim 1～5, it is characterized in that, described compatilizer is selected from one or more in polyolefin grafted maleic anhydride or the polyolefin graft acrylic acid.
7. colour according to claim 6 is decided island composite short fiber and production method thereof; It is characterized in that; Described polyolefin grafted maleic anhydride is more than one of polycthylene grafted maleic anhydride (PE-g-MAH) or polypropylene grafted maleic anhydride (PP-g-MAH), and described polyolefin graft acrylic acid is one or more of polycthylene grafted acryhic (PE-g-AA) and polypropylene grafted acrylic acid (PP-g-AA).
8. decide the preparation method of island composite short fiber according to each described colour of claim 1～7, it is characterized in that, comprise the steps:
(1) mixture, the sea component low density polyethylene (LDPE) with island component nylon 6, nylon based color master-batch and compatilizer adds storage bin separately respectively; Get into screw extruder separately then respectively; In a screw extruder, but sea component heating, extruding, fusion are become spinning melt A, but in another screw extruder, mixture heated, extruding, the fusion of island component become spinning melt B, after the filtration; But but spinning melt A passes through spinning manifold metering separately with spinning melt B; Get in the same filament spinning component, moment accomplishes and converges at the spinnerets place again, from spinneret orifice ejection melt thread;
(2) from the melt thread of spinneret orifice ejection through cooling forming, obtain fiber, oil successively then, boundling, the bucket that falls, placed 24～72 hours, eliminate its internal stress;
(3) fibre bundle that step (2) is obtained passes through the creel boundling, and the tow behind the boundling gets into first drawing machine, gets into second drawing machine through oil bath then;
(4) tow after drawing-off gets into crimping machine through folded silk machine, curls, and sends in the relaxation heat setting machine again and finalizes the design;
(5) tow behind the relaxation heat setting is cut off through cutting machine, can obtain colour of the present invention and decide the island composite short fiber.
9. method according to claim 8 is characterized in that, the spinning body temperature of the sea component of said step (1) is 120～170 ℃, and the spinning body temperature of island component is 275～295 ℃, and spinning speed is 500～1200m/min.
10. method according to claim 8 is characterized in that, used finish is that weight content is the aqueous solution of 6%～8% multicomponent phosphate mineral oil based spinning oil when oiling in the said step (2), and barrel speed that falls is 500～1200m/min.
11. method according to claim 8; It is characterized in that the dawn number of tow was 20～1,600,000 dawn behind the middle boundling of said step (3), the first drawing roller speed, 40～80m/min; The second drawing roller speed, 80～250m/min; 2～4.5 times of drafting multiples, the finish in the oil bath are the aqueous solution of 6%～8% multicomponent phosphate mineral oil based spinning oil, and temperature is 35～64 ℃.
12. method according to claim 8 is characterized in that, the temperature of relaxation heat setting machine is 80～30 ℃ from high to low in the said step (4).
13. method according to claim 8 is characterized in that, cutting machine speed is 30～80m/min in the said step (5), and shearing length is 38～64mm.
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