CN106313763A - Aerogel-based composite aluminum fiber acoustic panel absorber and preparation method thereof - Google Patents
Aerogel-based composite aluminum fiber acoustic panel absorber and preparation method thereof Download PDFInfo
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- CN106313763A CN106313763A CN201610692619.2A CN201610692619A CN106313763A CN 106313763 A CN106313763 A CN 106313763A CN 201610692619 A CN201610692619 A CN 201610692619A CN 106313763 A CN106313763 A CN 106313763A
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- aluminum
- gum base
- fiber
- aluminum fiber
- sound absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/103—Metal fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
Abstract
The invention relates to an aerogel-based composite aluminum fiber acoustic panel absorber and a preparation method of the aerogel-based composite aluminum fiber acoustic panel absorber, and belongs to the field of manufacturing of metal sound absorption materials. The aerogel-based composite aluminum fiber acoustic panel absorber comprises aluminum screen plates, aerogel-based fiber felts and an aluminum fiber felt, wherein the aerogel-based fiber felts are adhered on two sides of the aluminum fiber felt, and the aluminum screen plates are adhered on the outer sides of the aerogel-based fiber felts. Compared with the prior art, the method related in the invention is wide in application range, readily available in raw materials and low in cost, the manufactured aerogel-based aluminum fiber acoustic panel absorber has the advantages of simple process equipment, quick production speed, low cost, noninflammability, good mechanical properties, high strength, good toughness, impact resistance and capabilities of withstanding high-speed air flow, water-current scouring and the like, and is further of great significance on sound absorption fields of ship cabins, vehicle bodies, aircrafts, industrial workshop ceilings, mechanical vibration engines and the like.
Description
Technical field
The invention belongs to metal sound-absorbing material and manufacture field, especially relate to a kind of airsetting gum base clad aluminum fiber sound absorption plate
And preparation method thereof.
Background technology
Aluminum fiber acoustic board is a kind of thinner thickness, the metal sound-absorbing material of lighter weight.Have tradition sound-absorbing material concurrently, as
Super glass wool, mineral wool, all advantages of rock wool, and overcome its shortcoming, it is easy to process, install and clean, and have fabulous
Decoration functions.Compared with general traditional fibre sound-absorbing material, traditional material quality is softer, and intensity is relatively low, and organic fiber is inhaled
Sound material hydroscopicity is higher, easily burns, and inorfil sound-absorbing material is not easy to decompose, meeting serious environment pollution, simultaneously can
The phenomenon of human allergy can be caused to occur.Additionally, some sound-absorbing material, if graininess sound-absorbing material is in installation process, meeting
There is particulate matter to fall, cause danger；Foamed sound-absorbing material can occur aging in use for some time, uses temperature significantly
Reduce, the problems such as acoustic absorptivity degradation after moisture absorption.And aluminum fiber acoustic board has many good characteristics, can extensively answer
For sound absorption fields such as ship's space, car body, aircraft, industrial premises ceiling, mechanical vibration electromotors.
The Comprehensive Characteristics of airsetting gum base clad aluminum fiber sound absorption plate is that mechanics, calorifics, acoustical behavior are good, is resistant to hit
Hit, weather resistance, be able to take washing away of high velocity air and current, use in extremely moist environment, safety and environmental protection without
Pollute.When running into shock, generally, first deform upon, such as surface irregularity or be bent, do not result in danger.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide a kind of airsetting gum base to be combined
Aluminum fiber acoustic board and preparation method thereof.
The present invention utilizes binding agent that the aluminum fiber mat with sound absorption function is carried out compound obtaining with airsetting gum base fiber felt
Adiabatic sound-absorbing aluminum fibrous composite.Keeping aluminum fiber mat mechanical property, full while reaching good sqouynd absorption lowering noise effect
Foot insulation requirements.The process equipment of aluminum fiberboard is simple, and speed of production is fast, low cost.In addition, aluminum fiberboard does not fires, power
Performance is good, and intensity is high, good toughness, resistance to is impacted, and is amenable to washing away of high velocity air, moreover it is possible to carry out appearance design easily,
More attractive in appearance.And airsetting gum base fiber felt heat conductivity is low, thickness is thin, and hydrophobic rate is high, and tensile strength is good, and both pass through binding agent
Compound, the requirement of sqouynd absorption lowering noise can be met, the requirement of thermal insulation can be met again.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of airsetting gum base clad aluminum fiber sound absorption plate, including aluminum web plate, airsetting gum base fiber felt and aluminum fiber mat, described
The two-side adhesive of aluminum fiber mat have airsetting gum base fiber felt, the outboard bonds of described airsetting gum base fiber felt to have aluminum web plate.
Further, described aluminum fiber mat is made up of aluminum filament, and thickness is between 0.5～2mm.
Further, described airsetting gum base fiber felt is silicon oxide or ferrum oxide inorganic aerogels fiber felt.
The preparation method of a kind of airsetting gum base clad aluminum fiber sound absorption plate, comprises the following steps:
(1) it is directly prepared into the method acquisition aluminum filament of aluminum fiber by liquid, and makes aluminum fiber mat so that it is surface is put down
Whole, remove the unnecessary aluminum filament of periphery；
(2) with binding agent, the aluminum web plate of airsetting gum base fiber felt and corresponding size is adhesively fixed, obtains airsetting gum base fine
Dimension felt aluminum web plate；
(3) carry out by the aluminum fiber mat obtained in 2 blocks of airsetting gum base fiber felt aluminum web plates of step (2) gained and step (1)
Sandwich structure is combined, and cure package is also rolled by roller press, i.e. obtains airsetting gum base clad aluminum fiber sound absorption plate, should
Airsetting gum base clad aluminum fiber sound absorption plate surfacing, uniformly, mechanics, calorifics, acoustical behavior are good.
Further, described aluminum fiber mat is made up of aluminum filament, and thickness is between 0.5～2mm.
Further, described airsetting gum base fiber felt is silicon oxide or ferrum oxide inorganic aerogels fiber felt.
Further, described binding agent is organic binder bond or inorganic binder.
Further, described curing mode is normal temperature cure or hot setting mode.
Technical solution of the present invention gives binding agent, aluminum fiberboard, the material of airsetting gum base fiber felt and acquisition pattern,
Obviously, use other different types of binding agent, aluminum fiberboard and airsetting gum base fiber felt, belong to protection scope of the present invention.
Airsetting gum base clad aluminum fiber sound absorption plate prepared by the present invention can be widely used in ship's space, car body, aircraft,
Industrial premises ceiling, the sound absorption such as mechanical vibration electromotor field.
Compared with prior art, the method that the present invention relates to is widely applicable, raw material is easy to get, with low cost, the airsetting of manufacture
It is simple that gum base aluminum fiber acoustic board has process equipment, and speed of production is fast, low cost, noninflammability, and mechanical property is good, and intensity is high,
Good toughness, resistance to is impacted, and is amenable to the advantage such as wash away of high velocity air and current, for ship's space, car body, aircraft, industry
Factory Building ceiling, the sound absorption field such as mechanical vibration electromotor has great importance.
Accompanying drawing explanation
Fig. 1 is airsetting gum base clad aluminum fiber sound absorption plate structural representation of the present invention.
In figure, 1, aluminum web plate, 2, airsetting gum base fiber felt, 3, aluminum fiber mat.
Detailed description of the invention
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of airsetting gum base clad aluminum fiber sound absorption plate, as it is shown in figure 1, include aluminum web plate 1, airsetting gum base fiber felt 2 and
Aluminum fiber mat 3, the two-side adhesive of aluminum fiber mat 3 has airsetting gum base fiber felt 2, the outboard bonds of airsetting gum base fiber felt 2 to have aluminum
Web plate 1, aluminum fiber mat 3 is made up of aluminum filament, and thickness is between 0.5～2mm, and airsetting gum base fiber felt 2 is silicon oxide or oxygen
Change ferrum inorganic aerogels fiber felt.
Embodiment 2
Density is 840g/m2The manufacture of aluminum acoustic board
It is that 0.5mm aluminum fiber mat is stained with two pieces that to aoxidize the aluminum web plate of silica-based inorganic aerogels fiber felt sandwiched by thickness,
Its sandwich structure is rolled by roller press, and making density after normal temperature cure is 840g/m2Aluminum acoustic board.The horizontal stroke of aluminum fiberboard
It is about 70kg/cm to tensile strength2, elongation percentage is about 18%, and endwise tensile strength is about 400kg/cm2, elongation percentage is 12%
Left and right.
Embodiment 3
Density is 1250g/m2The manufacture of aluminum acoustic board
It is that 2mm aluminum fiber mat is sandwiched with two blocks of aluminum web plates being stained with oxidation iron-based inorganic aerogels fiber felt by thickness, its
Sandwich structure is 1250g/m by making density after roller press rolling, hot setting2Aluminum acoustic board.The horizontal stroke of aluminum fiberboard
It is about 80kg/cm to tensile strength2, elongation percentage is about 20%, and endwise tensile strength is about 500kg/cm2, and elongation percentage is
About 17%.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and use invention.
These embodiments obviously easily can be made various amendment by person skilled in the art, and described herein typically
Principle is applied in other embodiments without through performing creative labour.Therefore, the invention is not restricted to above-described embodiment, ability
Field technique personnel should be the present invention's according to the announcement of the present invention, the improvement made without departing from scope and amendment
Within protection domain.
Claims (8)
1. an airsetting gum base clad aluminum fiber sound absorption plate, it is characterised in that include aluminum web plate (1), airsetting gum base fiber felt (2)
And aluminum fiber mat (3), the two-side adhesive of described aluminum fiber mat (3) has airsetting gum base fiber felt (2), and described airsetting gum base is fine
The outboard bonds of dimension felt (2) has aluminum web plate (1).
A kind of airsetting gum base clad aluminum fiber sound absorption plate the most according to claim 1, it is characterised in that described aluminum fiber
Felt (3) is made up of aluminum filament, and thickness is between 0.5～2mm.
A kind of airsetting gum base clad aluminum fiber sound absorption plate the most according to claim 1, it is characterised in that described aeroge
Base fiber felt (2) is silicon oxide or ferrum oxide inorganic aerogels fiber felt.
4. the preparation method of an airsetting gum base clad aluminum fiber sound absorption plate, it is characterised in that comprise the following steps:
(1) it is directly prepared into the method acquisition aluminum filament of aluminum fiber by liquid, and makes aluminum fiber mat so that it is surfacing,
Remove the unnecessary aluminum filament of periphery；
(2) with binding agent, the aluminum web plate of airsetting gum base fiber felt and corresponding size is adhesively fixed, obtains airsetting gum base fiber felt
Aluminum web plate；
(3) Sanming City is carried out by the aluminum fiber mat obtained in 2 blocks of airsetting gum base fiber felt aluminum web plates of step (2) gained and step (1)
Controlling structure composite, cure package is also rolled by roller press, i.e. obtains airsetting gum base clad aluminum fiber sound absorption plate.
The preparation method of a kind of airsetting gum base clad aluminum fiber sound absorption plate the most according to claim 4, it is characterised in that institute
The aluminum fiber mat stated is made up of aluminum filament, and thickness is between 0.5～2mm.
The preparation method of a kind of airsetting gum base clad aluminum fiber sound absorption plate the most according to claim 4, it is characterised in that institute
The airsetting gum base fiber felt stated is silicon oxide or ferrum oxide inorganic aerogels fiber felt.
The preparation method of a kind of airsetting gum base clad aluminum fiber sound absorption plate the most according to claim 4, it is characterised in that institute
The binding agent stated is organic binder bond or inorganic binder.
The preparation method of a kind of airsetting gum base clad aluminum fiber sound absorption plate the most according to claim 4, it is characterised in that institute
The curing mode stated is normal temperature cure or hot setting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610692619.2A CN106313763A (en) | 2016-08-19 | 2016-08-19 | Aerogel-based composite aluminum fiber acoustic panel absorber and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610692619.2A CN106313763A (en) | 2016-08-19 | 2016-08-19 | Aerogel-based composite aluminum fiber acoustic panel absorber and preparation method thereof |
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| Publication Number | Publication Date |
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| CN106313763A true CN106313763A (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610692619.2A Pending CN106313763A (en) | 2016-08-19 | 2016-08-19 | Aerogel-based composite aluminum fiber acoustic panel absorber and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111253145A (en) * | 2020-03-20 | 2020-06-09 | 上海大音希声新型材料有限公司 | Fiber-reinforced sound absorption composite material and preparation method thereof |
| CN112659675A (en) * | 2020-12-24 | 2021-04-16 | 南京海通电子材料科技有限公司 | Method for manufacturing gradient material |
| CN113998983A (en) * | 2021-10-28 | 2022-02-01 | 中国电子科技集团公司第十八研究所 | Composite thermal insulation material integrally formed with battery shell and preparation process thereof |
| CN114031366A (en) * | 2021-12-20 | 2022-02-11 | 湖南荣岚智能科技有限公司 | Composite material prepared by aerogel-filled metal frame structure and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1463838A (en) * | 2002-06-10 | 2003-12-31 | 孙愈敏 | Aluminum fiber acoustic board and its making process |
| JP2007313698A (en) * | 2006-05-24 | 2007-12-06 | Shizuka:Kk | Heat radiating, sound absorbing/insulating honeycomb panel body and box-shaped structure |
| CN201599533U (en) * | 2009-06-02 | 2010-10-06 | 成都思摩纳米技术有限公司 | High temperature heat-perseveration thermal-insulation composite material |
-
2016
- 2016-08-19 CN CN201610692619.2A patent/CN106313763A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1463838A (en) * | 2002-06-10 | 2003-12-31 | 孙愈敏 | Aluminum fiber acoustic board and its making process |
| JP2007313698A (en) * | 2006-05-24 | 2007-12-06 | Shizuka:Kk | Heat radiating, sound absorbing/insulating honeycomb panel body and box-shaped structure |
| CN201599533U (en) * | 2009-06-02 | 2010-10-06 | 成都思摩纳米技术有限公司 | High temperature heat-perseveration thermal-insulation composite material |
Non-Patent Citations (2)
| Title |
|---|
| 常州市科学技术协会 组编: "《新材料》", 31 December 2011, 东南大学出版社 * |
| 陈照峰等: "《无机非金属材料学（第2版）》", 29 February 2016, 西北工业大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111253145A (en) * | 2020-03-20 | 2020-06-09 | 上海大音希声新型材料有限公司 | Fiber-reinforced sound absorption composite material and preparation method thereof |
| CN112659675A (en) * | 2020-12-24 | 2021-04-16 | 南京海通电子材料科技有限公司 | Method for manufacturing gradient material |
| CN113998983A (en) * | 2021-10-28 | 2022-02-01 | 中国电子科技集团公司第十八研究所 | Composite thermal insulation material integrally formed with battery shell and preparation process thereof |
| CN114031366A (en) * | 2021-12-20 | 2022-02-11 | 湖南荣岚智能科技有限公司 | Composite material prepared by aerogel-filled metal frame structure and preparation method thereof |
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| CB03 | Change of inventor or designer information |
Inventor after: Yang Xuejiao Inventor after: Wang Zhiping Inventor after: Wang Kaizhong Inventor after: Liu Yingjie Inventor after: Xi Lianying Inventor before: Yang Xuejiao Inventor before: Wang Zhiping Inventor before: Wang Kaizhong Inventor before: Lu Yinji Inventor before: Xi Lianying |
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Application publication date: 20170111 |
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