CN109322142A - A kind of processing method of antibacterial textile - Google Patents
A kind of processing method of antibacterial textile Download PDFInfo
- Publication number
- CN109322142A CN109322142A CN201811253318.5A CN201811253318A CN109322142A CN 109322142 A CN109322142 A CN 109322142A CN 201811253318 A CN201811253318 A CN 201811253318A CN 109322142 A CN109322142 A CN 109322142A
- Authority
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- China
- Prior art keywords
- textile
- presoma
- zinc
- antibacterial
- source presoma
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- 239000004753 textile Substances 0.000 title claims abstract description 60
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 28
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 32
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 25
- 239000001301 oxygen Substances 0.000 claims abstract description 25
- 238000003851 corona treatment Methods 0.000 claims abstract description 21
- 239000011787 zinc oxide Substances 0.000 claims abstract description 16
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000000231 atomic layer deposition Methods 0.000 claims abstract description 15
- 239000011701 zinc Substances 0.000 claims abstract description 15
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims abstract description 14
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 12
- 230000035484 reaction time Effects 0.000 claims description 12
- 230000002000 scavenging effect Effects 0.000 claims description 12
- HQWPLXHWEZZGKY-UHFFFAOYSA-N diethylzinc Chemical compound CC[Zn]CC HQWPLXHWEZZGKY-UHFFFAOYSA-N 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- ZOIORXHNWRGPMV-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O.CC(O)=O ZOIORXHNWRGPMV-UHFFFAOYSA-N 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 239000004246 zinc acetate Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 17
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 7
- 241000894006 Bacteria Species 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000845 anti-microbial effect Effects 0.000 description 4
- 230000003115 biocidal effect Effects 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229920000297 Rayon Polymers 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000635 Spelter Inorganic materials 0.000 description 1
- DBJUEJCZPKMDPA-UHFFFAOYSA-N acetic acid;zinc Chemical compound [Zn].CC(O)=O DBJUEJCZPKMDPA-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
- D06M10/06—Inorganic compounds or elements
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/44—Oxides or hydroxides of elements of Groups 2 or 12 of the Periodic Table; Zincates; Cadmates
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The present invention relates to a kind of processing methods of antibacterial textile, belong to fabric modifying processing technology field.The present invention is mainly first by textile through sided corona treatment, it is subsequently placed in the reaction chamber of plasma enhanced atomic layer deposition, using zinc source presoma and oxygen source presoma as raw material, it is exposed in presoma while being passed through plasma, zinc source presoma and the reaction of oxygen source presoma alternate cycles, finally zinc oxide film is generated in textile surface to get Durable antibacterial textile is arrived.The textile surface that this method is prepared coats thinner zinc oxide film, can have antibacterial effect, and low reaction temperatures can guarantee that the mechanical performance of textile is unaffected, there are no pollution to the environment, and processing cost is low, with good application prospect.
Description
Technical field
The present invention relates to a kind of processing methods of antibacterial textile, belong to fabric modifying processing technology field.
Background technique
Textile can not only help human body to keep constant body temperature as a kind of necessity, can also prevent such as branch, sand
The objects such as stone damage human body.However textile bacterium easy to breed in use, especially at a suitable temperature, bacterium
Mass propagation can be such that the properties of textile reduce, and distribute penetrating odor, seriously affected snugness of fit.Meanwhile carefully
The presence of bacterium can make people infect various diseases, threatened there is great human health, therefore, resisted to textile
Bacterium processing is the challenge urgently to be resolved of present textile industry.
Currently, having had certain progress to antibacterial textile processing, Chinese publication CN104594024A is open
On May 06th, 2015 day, invention and created name are a kind of method for preparing antibiotic-mould proof textile fabric, and this application mainly will
Average grain diameter is to obtain catalyst zinc oxide antimicrobial fluid after dispersion liquid is made in 23 nanometers of catalyst zinc oxide, then textile is immersed in
Antibiotic-mould proof textile fabric is obtained in this antimicrobial fluid.The textile being prepared through this method is internal under the irradiation of natural light
Catalyst zinc oxide can decomposite electronegative electronics in air, while leave positively charged hole, and this hole can be by oxygen
Gas shift is active oxygen to kill bacterium.But this method carries out in water solution system, need to use a large amount of hydrochloric acid and ammonium hydroxide
It neutralizes, it is unfriendly to environment, and experiment condition is more harsh, need ultraviolet light to carry out to it catalytic treatment, complex steps, separately
Outside, which adds catalyst zinc oxide for textile in a manner of impregnating, and antibacterial durability will have a greatly reduced quality.
In Chinese publication CN105220451A, publication date on 01 06th, 2016, invention and created name be with
Antibacterial and promote mineralization function coating polyethylene terephthalate braided material preparation method, the patent is by PET material
It is placed in atomic layer deposition and carries out the coating of zinc oxide, finally obtain the PET that surface thickness is 100 nano oxidized spelter coatings and weave
Material, antibiotic property reach 90%.Although the material technology that the method is handled is simple, free from environmental pollution, however material is necessary
It just can be carried out in 200 degrees Celsius of high temperature, greatly destroy the mechanical performance of material, for textile material,
High temperature can make its generate yellow, and glossiness reduces, and feel is hardened embrittlement, seriously affect the wearing comfort of textile.
In conclusion not only to have under conditions of not damaging its original properties for the antimicrobial treatment of textile
Effect ground endowing antibacterial energy, and need to meet simple process, and operation is easy, and process is controllable, to the theory that environment does not pollute,
So this case proposes the preparation method of this permanent antibacterial fabric.
Summary of the invention
There are problems for above-mentioned, it is an object of the invention to overcome drawbacks described above, provide a kind of place of antibacterial textile
Reason method is to meet the technical solution of the object of the invention:
A kind of processing method of antibacterial textile, including the sided corona treatment and atomic layer deposition in handling antibacterial textile
Reaction treatment, processing method, which is used, is placed in atomic layer deposition reaction chamber for the textile after sided corona treatment, then by zinc source presoma
It is alternately passed through in reaction chamber with oxygen source presoma timing, wherein the zinc source presoma burst length is 5~20 milliseconds, reaction
Time is 8~25 seconds, and scavenging period is 5~20 seconds, and the oxygen source presoma burst length is 5~20 milliseconds, and the reaction time is 8~25
Second, scavenging period is 8~25 seconds, while argon gas discharging is generated into plasma using plasma reactor, and with zinc source before
It drives body or oxygen source presoma is passed through in reaction chamber together, wherein reaction chamber temperature is 10~60 degrees Celsius, and forerunner's temperature is
10~30 degrees Celsius, by being activated to presoma, enhances the reaction activity of textile and presoma, make presoma and textile
The hydroxyl on surface carries out Chemisorption, recycles by alternating deposit 10~60 times, after sided corona treatment textile surface with
The form of chemistry key connection generates antibacterial zinc oxide film.
The textile is natural fiber or chemical fibre or yarn or fabric made of fiber.
The zinc source presoma is one of diethyl zinc or zinc acetate；Oxygen source presoma is deionized water or oxygen etc.
One of gas ions.
The argon gas is high-purity argon gas, purity 99.999%.
Due to using above technical scheme, advantageous effects of the present invention are:
1 present invention is modified processing to textile using atomic layer deposition, makes the activity of presoma and textile surface
Chemisorption occurs for group to generating uniform zinc oxide thin layer, bonding different from physical method and inlays, this
Kind of method is tightly linked zinc oxide film and textile by chemical bond, enhances the durability of antibacterial, including washability and resistance to
Mill property.
Textile after sided corona treatment is placed in atomic layer deposition reaction chamber by 2 treatment methods, makes zinc source presoma and oxygen
Source presoma alternately carries out circular response with textile, and joined plasma in atomic layer deposition process, further increases
The strong reactivity of presoma and textile, experiments verify that, reaction chamber temperature can be down to 10 to 60 degrees Celsius, far below general
The reaction temperature of logical atomic layer deposition, can reduce temperature to a certain extent influences the performance of textile.In addition, because of corona
Treated, and textile has preferable surface-active, and reaction work can be further enhanced by being passed through plasma during the reaction
Property, it is measured through experiment, just has preferable antibiotic property after textile surface plates the zinc oxide film of 10 circulations or more, this is not
The use of raw material is only effectively reduced, influence of the coating to fabric feeling can also be reduced.
Atomic layer deposition system selected by 3 present invention has raw material availability height, environmentally friendly, and not additional is useless
Water generates, pollution-free, and the characteristics of time-consuming short (time is that antimicrobial treatment can be completed in 8~30 minutes), process flow is few, operation
Process facilitates easily-controllable, it is easy to accomplish industrialized production.
Specific embodiment
Combined with specific embodiments below, present invention is further described in detail.
A kind of processing method of antibacterial textile,
1. textile is placed on corona machine and carries out sided corona treatment, sided corona treatment electric current is 0.5~2 peace, and processing voltage is
110 kilovolts.
2. the textile after sided corona treatment is placed in atomic layer deposition reaction chamber, then by zinc source presoma and oxygen source presoma
It is alternately passed through in reaction chamber to timing, wherein zinc source presoma is one of diethyl zinc or zinc acetate；Oxygen source presoma
For one of deionized water or oxygen plasma.The zinc source presoma burst length is 5~20 milliseconds, and the reaction time is 8~25
Second, scavenging period is 5~20 seconds, and the oxygen source presoma burst length is 5~20 milliseconds, and the reaction time is 8~25 seconds, scavenging period
Be 8~25 seconds, while argon gas discharging generated into plasma using plasma reactor, and with zinc source presoma or oxygen source before
It drives body to be passed through in reaction chamber together, argon gas is high-purity argon gas, purity 99.999%.Wherein, reaction chamber temperature is taken the photograph for 10~60
Family name's degree, forerunner's temperature are 10~30 degrees Celsius, and by activating to presoma, enhancing textile reacts activation with presoma
Can, so that the hydroxyl of presoma and textile surface is carried out Chemisorption, is recycled by alternating deposit 10~60 times, in corona
Textile surface generates antibacterial zinc oxide film in the form of chemistry key connection after processing.
The textile is natural fiber or chemical fibre or yarn or fabric made of fiber.
Specific embodiment
Embodiment 1
1. cotton fabric is placed on corona machine and carries out sided corona treatment, sided corona treatment electric current is 2 peaces, and processing voltage is 110,000
Volt.
2. the cotton fabric after sided corona treatment is placed in plasma enhanced atomic layer deposition reaction chamber, diethyl zinc is set
The presoma burst length is 20 milliseconds, and the reaction time is 25 seconds, and scavenging period is 20 seconds, and the deionized water presoma burst length is
20 milliseconds, the reaction time be 25 seconds, scavenging period be 25 seconds, while using plasma reactor by argon gas discharging generate etc. from
Daughter, and be passed through in reaction chamber together with diethyl zinc presoma or deionized water presoma, wherein reaction chamber temperature, which is arranged, is
60 degrees Celsius, the temperature of diethyl zinc and deionized water presoma is 30 degrees Celsius, is recycled by alternating deposit 60, in electricity
Textile surface generates antibacterial zinc oxide film in the form of chemistry key connection after dizzy processing.After tested, the method is handled
Cotton fabric antibiotic rate is up to 99.9%.
Embodiment 2
1. viscose yarn is placed on corona machine and carries out sided corona treatment, sided corona treatment electric current is 0.5 peace, and processing voltage is
110 kilovolts.
2. the viscose yarn after sided corona treatment is placed in plasma enhanced atomic layer deposition reaction chamber, zinc acetate is set
The presoma burst length is 5 milliseconds, and the reaction time is 8 seconds, and scavenging period is 5 seconds, and the oxygen plasma presoma burst length is 5
Millisecond, reaction time are 8 seconds, and scavenging period is 8 seconds, while argon gas discharging is generated plasma using plasma reactor
Body, and be passed through in reaction chamber together with acetic acid zinc precursor or oxygen plasma presoma, wherein setting reaction chamber temperature is 10
Degree Celsius, the temperature of zinc acetate and oxygen plasma presoma is 10 degrees Celsius, is recycled by alternating deposit 10, in corona
Textile surface generates antibacterial zinc oxide film in the form of chemistry key connection after processing.After tested, the cotton that the method is handled
Antibacterial fabric rate is up to 96%.
Embodiment 3
1. viscose yarn is placed on corona machine and carries out sided corona treatment, sided corona treatment electric current is 1 peace, and processing voltage is 110
Kilovolt.
2. the wool felt after sided corona treatment is placed in plasma enhanced atomic layer deposition reaction chamber, diethyl zinc is set
The presoma burst length is 10 milliseconds, and the reaction time is 15 seconds, and scavenging period is 15 seconds, the oxygen plasma presoma burst length
It is 10 milliseconds, the reaction time is 15 seconds, and scavenging period is 20 seconds, while utilizing plasma reactor by argon gas discharging generation etc.
Gas ions, and be passed through in reaction chamber together with diethyl zinc presoma or oxygen plasma presoma, wherein setting reaction room temperature
Degree is 40 degrees Celsius, and the temperature of diethyl zinc and oxygen plasma presoma is 20 degrees Celsius, is followed by alternating deposit 20
Ring, textile surface generates antibacterial zinc oxide film in the form of chemistry key connection after sided corona treatment.After tested, the method is handled
Obtained cotton fabric antibiotic rate is up to 98%.
Claims (4)
1. a kind of processing method of antibacterial textile, including in handling antibacterial textile sided corona treatment and atomic layer deposition it is anti-
It should handle, it is characterised in that: the textile after sided corona treatment is placed in atomic layer deposition reaction chamber, then by zinc source presoma and oxygen
It is alternately passed through in reaction chamber to source presoma timing, wherein the zinc source presoma burst length is 5~20 milliseconds, the reaction time
It is 8~25 seconds, scavenging period is 5~20 seconds, and the oxygen source presoma burst length is 5~20 milliseconds, and the reaction time is 8~25 seconds,
Scavenging period is 8~25 seconds, while argon gas discharging is generated plasma using plasma reactor, and with zinc source presoma
Or oxygen source presoma is passed through in reaction chamber together, wherein and reaction chamber temperature is 10~60 degrees Celsius, and forerunner's temperature is 10~
30 degrees Celsius, by being activated to presoma, enhances the reaction activity of textile and presoma, make presoma and textile surface
Hydroxyl carry out Chemisorption, by alternating deposit 10~60 times recycle, textile surface is after sided corona treatment with chemistry
The form of key connection generates antibacterial zinc oxide film.
2. a kind of processing method of antibacterial textile as described in claim 1, it is characterised in that: the textile is natural
Fiber or chemical fibre or yarn or fabric made of fiber.
3. a kind of processing method of antibacterial textile as described in claim 1, it is characterised in that: the zinc source presoma is
One of diethyl zinc or zinc acetate；Oxygen source presoma is one of deionized water or oxygen plasma.
4. a kind of processing method of antibacterial textile as described in claim 1, it is characterised in that: the argon gas is high-purity argon
Gas, purity 99.999%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253318.5A CN109322142A (en) | 2018-10-25 | 2018-10-25 | A kind of processing method of antibacterial textile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811253318.5A CN109322142A (en) | 2018-10-25 | 2018-10-25 | A kind of processing method of antibacterial textile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109322142A true CN109322142A (en) | 2019-02-12 |
Family
ID=65262335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811253318.5A Pending CN109322142A (en) | 2018-10-25 | 2018-10-25 | A kind of processing method of antibacterial textile |
Country Status (1)
| Country | Link |
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| CN (1) | CN109322142A (en) |
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|---|---|---|---|---|
| CN103773083A (en) * | 2012-10-18 | 2014-05-07 | 上海纳米技术及应用国家工程研究中心有限公司 | Optical interference color change pigment and its preparation method and application |
| WO2014078488A1 (en) * | 2012-11-16 | 2014-05-22 | Liquipel Ip Llc | Apparatus and methods for plasma enhanced chemical vapor deposition of polymer coatings |
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| CN105779971A (en) * | 2016-02-01 | 2016-07-20 | 中国科学院嘉兴微电子仪器与设备工程中心 | Method for depositing p-type semi-conductor zinc oxide film on atomic layer |
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2018
- 2018-10-25 CN CN201811253318.5A patent/CN109322142A/en active Pending
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Application publication date: 20190212 |