CN102995294A - Manufacturing method of antistatic needle fabric - Google Patents
Manufacturing method of antistatic needle fabric Download PDFInfo
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- CN102995294A CN102995294A CN2012105385586A CN201210538558A CN102995294A CN 102995294 A CN102995294 A CN 102995294A CN 2012105385586 A CN2012105385586 A CN 2012105385586A CN 201210538558 A CN201210538558 A CN 201210538558A CN 102995294 A CN102995294 A CN 102995294A
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- fiber
- needle fabric
- web
- antistatic
- lapping
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- 239000004744 fabric Substances 0.000 title claims abstract description 46
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 239000000835 fiber Substances 0.000 claims abstract description 128
- 238000000034 method Methods 0.000 claims abstract description 49
- 238000009987 spinning Methods 0.000 claims abstract description 32
- 239000002131 composite material Substances 0.000 claims abstract description 22
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 8
- 230000005686 electrostatic field Effects 0.000 claims abstract description 3
- 238000002360 preparation method Methods 0.000 claims description 14
- 229920000767 polyaniline Polymers 0.000 claims description 12
- 229920000642 polymer Polymers 0.000 claims description 12
- 238000009941 weaving Methods 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 7
- 239000002994 raw material Substances 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000004753 textile Substances 0.000 abstract description 2
- 238000007730 finishing process Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 229920000742 Cotton Polymers 0.000 description 12
- 239000000126 substance Substances 0.000 description 6
- 238000001467 acupuncture Methods 0.000 description 5
- 238000001523 electrospinning Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000004094 surface-active agent Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000005685 electric field effect Effects 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000009960 carding Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000010237 hybrid technique Methods 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910021595 Copper(I) iodide Inorganic materials 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002322 conducting polymer Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- AQMRBJNRFUQADD-UHFFFAOYSA-N copper(I) sulfide Chemical compound [S-2].[Cu+].[Cu+] AQMRBJNRFUQADD-UHFFFAOYSA-N 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- LSXDOTMGLUJQCM-UHFFFAOYSA-M copper(i) iodide Chemical compound I[Cu] LSXDOTMGLUJQCM-UHFFFAOYSA-M 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010036 direct spinning Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 230000010148 water-pollination Effects 0.000 description 1
Landscapes
- Nonwoven Fabrics (AREA)
- Woven Fabrics (AREA)
Abstract
The invention relates to a manufacturing method of an antistatic needle fabric, and belongs to the field of textile technology. According to the manufacturing method of the antistatic needle fabric, before a fiber web obtained from a mechanical web forming process enters into a lapping machine, the spinning liquid extruded from an electrostatic spinning nozzle is stretched into a superfine conductive fiber under the function of a high-voltage electrostatic field and is overlapped on the surface of the fiber net; and after a lapping process, a composite fiber web that the conductive fiber layer and the fiber net layer are mutually overlapped is formed. In comparison with the method for manufacturing the antistatic needle fabric by mixing the conductive fiber in the raw materials, the manufacturing method disclosed by the invention has an advantage of not changing the physical and mechanical performances of the fiber net; the produced antistatic needle fabric is good in durability, high in reliability, free from environmental pollution and special finishing process, short in production procedure, low in cost, and applicable to the mass production.
Description
Technical field
The present invention relates to a kind of manufacture method of antistatic needle fabric, belong to textile technology field.
Background technology
Needle fabric is widely used in the products such as carpet, automotive interior material, filtering material with good mechanical performance and good permeability.Because the charging property of chemical fibre is all stronger, when after making filtering material, being used for dry flue gas, dust-filtering, because relative humidity is little, easily produce and gather a large amount of electric charges, in filtration, easily work the mischief, can set off an explosion and fire when serious, cause casualties and to the destruction of workplace, so should select the non-woven filter material with antistatic effect for inflammable and explosive dust.Needle fabric is in use easily because of friction and induction generation static in addition, the phenomenons such as ash also can occur because being with upper static to inhale in product, such as carpet, construction decorating cloth etc., the dust that adsorbs also can be harmful, blood pH is raise, calcium content decreased, therefore the exploitation of antistatic needle fabric is very important.The method of needle fabric antistatic treatment mainly contains three kinds.The first is to put at a certain distance conductive filament when making non-weaving cloth, such as the metallic nickel fiber, the electric charge that gathers is released, thereby greatly reduces carried charge, but because conductive filament is somewhat expensive, the cost of needle fabric increases; Second method is on the basis of needle fabric, adopts surfactant directly antistatic treatment to be carried out on the non-weaving cloth surface.Action principle is that the surfactant molecule hydrophobic side is adsorbed in fiber surface, and hydrophily polar group pointing space forms polar surfaces, and low-fiber surface resistivity falls in the hydrone in the absorbed air, the accelerated charge loss.That used surfactant comprises is cationic, anionic and nonionic.The applying method that adopts has sprinkling, dipping, coating etc.Although adopt the method for surfactant processing needle fabric simple and easy to do, but need to put processing in order through special antistatic finish operation, exist simultaneously higher to the requirement of antistatic additive, surfactant is volatile, wash resistant, antistatic effect do not produce the shortcomings such as environmental pollution to product not lastingly, easily; The third method is to sneak into a certain amount of conductive fiber in the raw material of manufacturing needles spunlaced nonwoven, to reach anlistatig purpose.The preparation of conductive fiber mainly contains four large classes according to the difference of conductive compositions: metal system, carbon black system, conductivity type metallic compound, macromolecule conducting material.Metal is that the conductive fiber main method has direct fiber elongation method, is about to metal wire and repeatedly stretches by mould, makes the fiber of diameter 4～16 μ m.Carbon black is that conductive fiber is to utilize the electric conductivity of carbon black to make conductive fiber, and the method for manufacturing has doping method, coating, fiber charing to process three kinds of methods.Metallic compound type conductive fiber is that the electric conductivity that utilizes metallic compound to have prepares conductive fiber, such as copper sulfide, cuprous sulfide and cuprous iodide etc., when utilizing this class conductive compound, blend spinning method, absorption method, three kinds of methods of chemical reaction method is arranged.Utilize macromolecule conducting material to prepare conductive fiber, main method has two kinds of direct spinning, the post treatment methods of conducting polymer composite.The antistatic needle fabric that this method of sneaking into a certain amount of conductive fiber in the raw material of manufacturing needles spunlaced nonwoven makes has good, the lasting characteristics of antistatic effect, but manufacturing cost is high, and owing to added certain conductive fiber, the fibre web that makes is the aggregate of conductive fiber and chemical fibre, changed the original performance of fibre web, the fibre web that consists of with chemical fibre is distinguishing in performance, therefore in the product range of application certain limitation is arranged.
If can be in the manufacture process of needle fabric, adopt low-cost manufacture method, so that the antistatic effect of antistatic needle fabric has efficient, lasting characteristics, and do not change the performance of original fibre web, to be conducive to expand the Application Areas of antistatic needle fabric, reduce production costs, economize on resources.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of manufacture method of antistatic needle fabric.
To achieve these goals, the technical solution used in the present invention is, a kind of manufacture method of antistatic needle fabric, and described manufacture method may further comprise the steps:
Manufacture method comprises that the front preparation of the one-tenth net of non-weaving cloth, machinery become net, lapping, pinprick reinforcement operation, described manufacture method refers to, before becoming fibre web after the net operation to enter lapping machine to machinery, to under the effect of high-voltage electrostatic field, be drawn as ultra fine conductive fibers from the spinning solution that the electrostatic spinning spinning head is extruded, be superimposed upon on the surface of fibre web, after the lapping operation, form the overlapped composite web of conductive fiber layer and web layer.
Described ultra fine conductive fibers is that the fibre diameter that the spinning solution of the compound of polyaniline polymer or polyaniline polymer prepares is the ultra fine conductive fibers of nanometer scale.
Owing to adopted above technical scheme, antistatic needle fabric of the present invention has following characteristics:
One with the conventional chemical staple fibre, is raw material such as terylene, polypropylene fibre etc., on the fibre web that employing machinery one-tenth net method makes, is superimposed with the ultra fine conductive fibers that method of electrostatic spinning makes, and forms the overlapped composite web of conductive fiber layer and web layer after the lapping operation.Because it is that fibre diameter is the ultra fine conductive fibers of nanometer scale that method of electrostatic spinning makes, thinner more than 100～1000 times than conventional chemical staple fibre, the part by weight of ultra fine conductive fibers in composite web is very small, make antistatic needle fabric method and compare with in raw material, sneaking into conductive fiber, have the advantage of the physical and mechanical properties that does not change fibre web.
Two technical schemes of the present invention are compared with the art methods of antistatic finish, the ultra fine conductive fibers for preparing as raw material take the compound of polyaniline polymer or polyaniline polymer, in composite web, be not easy to scatter and disappear, the good endurance of the antistatic nonwoven product that makes, high, the non-environmental-pollution of reliability, and need not special arranging process, production procedure is short, and cost is low.
Three electrospinning devices are arranged on machinery and become between net and the lapping operation; on existing needle fabric production line; only electrospinning device need be set just can produce antistatic needle fabric; suitability for scale production; simultaneously the raw materials of chemical fibres of needle fabric do not had special requirement, adaptability is extensive.
The specific embodiment
Below in conjunction with specific embodiment the present invention is done and to describe in further detail.
A kind of manufacture method of antistatic needle fabric, manufacture method process following steps:
(1) becomes the front preparation of net
Raw material is staple fibre, becomes front preparation of net to comprise mixing, the shredding of fiber and apply necessary finish.In the shredding hybrid technique, produce the processing of electrostatic influence raw material in order to reduce raw material, before shredding, finish evenly is sprayed onto in the fiber heap with the cloud point shape, placed again 24～48 hours.The shredding hybrid technique is loosened fibrous raw material, and fiber block becomes fritter by bulk, obtains between fiber simultaneously evenly to mix.
(2) machinery becomes net
The mixed fiber of shredding becomes net through roller and clearer card machinery, makes the fibre web that is formed and had certain surface density by filament.
(3) preparation of electrostatic spinning conductive fiber
Before roller and clearer card output fibre web enters lapping machine, be provided with electrospinning device, above fibre web, be provided with spinning head, below fibre web, be provided with the pole plate of ground connection, spinning solution is connected the positive pole of high voltage source, the pole plate of ground connection connects the negative pole of high voltage source, form high voltage electric field between the pole plate of spinning head and ground connection, the spinning solution of extruding from spinning head is drawn into the superfine fibre that fibre diameter is nanometer scale under the high voltage electric field effect, fibre diameter is superimposed upon on the fibre web less than 1000 nanometers, and spinning solution is the compound of polyaniline polymer and polyaniline polymer, have good electric conductivity, the superfine fibre of preparation is exactly a kind of conductive fiber.According to the width of fibre web, a plurality of spinning heads can be set, spinning head is more, and the conductive fiber that superposes on the fibre web is also more, and the antistatic effect of needle fabric is also better.
(4) lapping
At the machinery fibre web into the net conductive fiber that superposes, through just having formed the overlapped composite web of conductive fiber layer and web layer behind the lapping machine laying.According to the requirement of the surface density of needling non-woven product, need the rationally surface density of control roller and clearer card output fibre web and the lapping number of plies of lapping machine.Lapping machine adopts staggered form lapping or the clipping lapping mode of two curtain, also can adopt combined type lapping mode.
(5) pinprick reinforcement
The composite web of lapping machine output, through the pricker puncture of needing machine, so that composite web has certain physical and mechanical propertiess such as ultimate strength.In the pinprick reinforcement operation, composite web carries out acupuncture through too much platform needing machine, and needing machine can be divided into pre-needling machine and main needing machine, and the composite web behind the pinprick reinforcement is wound up in the package through sutomatic winding machine, prepares antistatic needle fabric.
With above method, the antistatic needle fabric that makes has the physical and mechanical properties that does not change original fibre web, conductive fiber is difficult for scattering and disappearing, the antistatic property of product has good endurance, the characteristics that reliability is high, simultaneously the raw material of needle fabric do not had special requirement, adaptability is extensive.
Specific embodiment
Embodiment 1
Make antistatic needle punched carpet non-weaving cloth:
Its method is the process following steps:
(1) becomes the front preparation of net
Raw material is polypropylene short fiber, and specification is 2.5D * 51mm.Raw material is admitted to the blending lattice opener and carries out shredding through after feeding cotton weighing machine, and the cotton flow after the shredding enters multi-mixer mixes, and mixed cotton flow is admitted to again further shredding of opener.Preparatory stage before becoming net, fibrous raw material is loosened, and fiber block becomes fritter by bulk, obtains between fiber simultaneously evenly to mix, for machinery becomes net ready.
(2) machinery becomes net
The mixed cotton flow of shredding is admitted to the air-flow hopper and feeds cotton machine through the conveying of cotton transport blower fan, and behind the roller and clearer card carding, fiber is carded to the filament state, and the fibre web that makes mainly is comprised of filament.
(3) preparation of electrostatic spinning conductive fiber
Before roller and clearer card output fibre web enters lapping machine, be provided with electrospinning device, above fibre web, be provided with spinning head, below fibre web, be provided with the pole plate of ground connection, spinning solution is the polyaniline polymer, spinning solution is connected the positive pole of high voltage source, the pole plate of ground connection connects the negative pole of high voltage source, the voltage of power supply is 18～32kV, spinning head is 10～30cm to the distance between the pole plate, form high voltage electric field between the pole plate of spinning head and ground connection, the spinning solution of extruding from spinning head is drawn into the superfine fibre that fibre diameter is 500～750 nanometers under the high voltage electric field effect, be superimposed upon on the fibre web.Because the polyaniline polymer has good electric conductivity, the superfine fibre of preparation is exactly a kind of conductive fiber.The width of fibre web is 2500mm, and in order to make the conductive fiber that superposes on the fibre web more, the antistatic effect of needle fabric is better, and 8 spinning heads are set.
(4) lapping
At the machinery fibre web into the net conductive fiber that superposes, through just having formed the overlapped composite web of conductive fiber layer and web layer behind the lapping machine laying.Rationally adjust and the surface density of control roller and clearer card output fibre web and the lapping number of plies of lapping machine, so that the fibre web surface density after the lapping meets the requirement of product.Lapping machine adopts four curtain formula staggered form lapping machine lappings.
(5) pinprick reinforcement
The composite web of lapping machine output, the pricker puncture through needing machine makes composite web have certain physical and mechanical properties.Composite web passes through respectively pre-needling machine (upper thorn formula), main needing machine (lower thorn formula), main needing machine (upper thorn formula), main needing machine (to the thorn formula), main needing machine (to the thorn formula) and carries out acupuncture.Composite web behind the pinprick reinforcement is wound up in the package through sutomatic winding machine, prepares antistatic needle punched carpet non-weaving cloth.
Embodiment 2.
Make antistatic acupuncture and filter non-weaving cloth:
Its method is the process following steps:
(1) becoming the front preparation of net raw material is polypropylene short fiber, and specification is 2.5D * 51mm.Raw material is admitted to the blending lattice opener and carries out shredding through after feeding cotton weighing machine, and the cotton flow after the shredding enters multi-mixer mixes, and mixed cotton flow is admitted to again further shredding of opener.Preparatory stage before becoming net, fibrous raw material is loosened, and fiber block becomes fritter by bulk, obtains between fiber simultaneously evenly to mix, for machinery becomes net ready.
(2) machinery becomes net
The mixed cotton flow of shredding is admitted to the air-flow hopper and feeds cotton machine through the conveying of cotton transport blower fan, and behind the roller and clearer card carding, fiber is carded to the filament state, and the fibre web that makes mainly is comprised of filament.
(3) preparation of electrostatic spinning conductive fiber
Before roller and clearer card output fibre web enters lapping machine, be provided with electrospinning device, above fibre web, be provided with spinning head, below fibre web, be provided with the pole plate of ground connection, spinning solution is the compound of polyaniline polymer, spinning solution is connected the positive pole of high voltage source, the pole plate of ground connection connects the negative pole of high voltage source, the voltage of power supply is 18～32kV, spinning head is 10～30cm to the distance between the pole plate, form high voltage electric field between the pole plate of spinning head and ground connection, the spinning solution of extruding from spinning head is drawn into the superfine fibre that fibre diameter is 500～750 nanometers under the high voltage electric field effect, be superimposed upon on the fibre web.Because the compound of polyaniline polymer has good electric conductivity, the superfine fibre of preparation is exactly a kind of conductive fiber.The width of fibre web is 2500mm, and in order to make the conductive fiber that superposes on the fibre web more, the antistatic effect of needle fabric is better, and 8 spinning heads are set.
(4) lapping
Be superimposed with conductive fiber at machinery fibre web into the net, through just having formed the overlapped composite web of conductive fiber layer and web layer behind the lapping machine laying.Rationally adjust and the surface density of control roller and clearer card output fibre web and the lapping number of plies of lapping machine, so that the fibre web surface density after the lapping meets the requirement of product.Lapping machine adopts four curtain formula staggered form lapping machine lappings.
(5) pinprick reinforcement
The composite web of lapping machine output, through the pricker puncture of needing machine, so that composite web has certain physical and mechanical properties.Composite web passes through respectively pre-needling machine (upper thorn formula), main needing machine (lower thorn formula), main needing machine (upper thorn formula), main needing machine (to the thorn formula) and carries out acupuncture.
(6) arrangement after
The materials such as dust for the surface attachment that makes non-weaving cloth, break away from easily non-weaving cloth, composite web behind the pinprick reinforcement is through the hot-rolling mill hot rolling, surface to product is put in order, the non-weaving cloth of hot-rolling mill output is wound up in the package by sutomatic winding machine, obtains antistatic acupuncture and filters non-weaving cloth.
Claims (2)
1. the manufacture method of an antistatic needle fabric comprises that the front preparation of one-tenth net, the machinery of non-weaving cloth becomes net, lapping, pinprick reinforcement operation, it is characterized in that described manufacture method refers to:
Before becoming fibre web after the net operation to enter lapping machine to machinery, to under the effect of high-voltage electrostatic field, be drawn as ultra fine conductive fibers from the spinning solution that the electrostatic spinning spinning head is extruded, be superimposed upon on the surface of fibre web, after the lapping operation, form the overlapped composite web of conductive fiber layer and web layer.
2. the manufacture method of a kind of antistatic needle fabric as claimed in claim 1 is characterized in that: described ultra fine conductive fibers is that the fibre diameter of spinning solution preparation of the compound of polyaniline polymer or polyaniline polymer is the ultra fine conductive fibers of nanometer scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210538558.6A CN102995294B (en) | 2012-12-13 | 2012-12-13 | Manufacturing method of antistatic needle fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210538558.6A CN102995294B (en) | 2012-12-13 | 2012-12-13 | Manufacturing method of antistatic needle fabric |
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| CN102995294A true CN102995294A (en) | 2013-03-27 |
| CN102995294B CN102995294B (en) | 2015-04-29 |
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| CN201210538558.6A Active CN102995294B (en) | 2012-12-13 | 2012-12-13 | Manufacturing method of antistatic needle fabric |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603137A (en) * | 2013-11-11 | 2014-02-26 | 绍兴市恒睿无纺布科技有限公司 | Papermaking rubber roller with high-strength non-woven and production process |
| WO2018010347A1 (en) * | 2016-07-12 | 2018-01-18 | 江苏盛纺纳米材料科技股份有限公司 | Antistatic nanofiber nonwoven material and manufacturing method |
| CN109325272A (en) * | 2018-09-05 | 2019-02-12 | 东华大学 | A kind of method electrostatic spinning fibre net homogeneity simulation and calculated |
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Cited By (4)
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| CN103603137A (en) * | 2013-11-11 | 2014-02-26 | 绍兴市恒睿无纺布科技有限公司 | Papermaking rubber roller with high-strength non-woven and production process |
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| WO2018010347A1 (en) * | 2016-07-12 | 2018-01-18 | 江苏盛纺纳米材料科技股份有限公司 | Antistatic nanofiber nonwoven material and manufacturing method |
| CN109325272A (en) * | 2018-09-05 | 2019-02-12 | 东华大学 | A kind of method electrostatic spinning fibre net homogeneity simulation and calculated |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102995294B (en) | 2015-04-29 |
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