CN207825651U - Polyethylene film and aerostat - Google Patents
Polyethylene film and aerostat Download PDFInfo
- Publication number
- CN207825651U CN207825651U CN201721523403.XU CN201721523403U CN207825651U CN 207825651 U CN207825651 U CN 207825651U CN 201721523403 U CN201721523403 U CN 201721523403U CN 207825651 U CN207825651 U CN 207825651U
- Authority
- CN
- China
- Prior art keywords
- layer
- polyethylene film
- aerostat
- film
- polyethylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Laminated Bodies (AREA)
Abstract
The utility model provides a kind of polyethylene film, including：Welding layer；Bearing layer is located on welding layer；Weathering layer is located on bearing layer；Reflection layer is located on weathering layer.Polyethylene film provided by the utility model not only can avoid causing sphere temperature obviously to rise because of sphere film absorption sunlight, and greatly reduce requirement to weathering layer performance, the dosage that the auxiliary agents such as light stabilizer, antioxidant can be reduced improves the mechanical property of polyethylene film.The utility model also provides a kind of aerostat being made by above-mentioned polyethylene film.
Description
Technical field
The present utility model application is related to material film, more particularly, to polyethylene film.
Background technology
Aerostat is a kind of unpowered aerostatics, be at present can few several aircraft that stratosphere works it
One, it is a kind of very important space exploration and and delivery vehicle.In the selection of aerostat material, usually with fabric
There is very high reliability for the composite skin material of carrier, but its is with high costs, using being very limited.And it is of low cost
Polyethylene film be applied to aerostat, cost can be greatly lowered, thus, develop the polyethylene film that has excellent performance at
For the key of aerostat development.
According to the difference of balloon inside and outside differential pressure, high-altitude polyethylene balloon can be divided into zero-pressure balloon and super-pressure balloon.Zero-pressure
Balloon utricule lower part has exhaust pipe to be communicated with outside atmosphere, utricule inside and outside differential pressure generally zero, during high-altitude flight, due to white
The difference of it and night solar radiation, the temperature difference are very big.Nocturnal temperature reduces, and buoyance lift contraction of gas in utricule, buoyancy reduces, balloon
Height declines, and for the height for remaining original, some ballasts of jettisoning is needed, to mitigate balloon weight.To daytime, and one need to be exhausted
Part buoyance lift gas.Part buoyance lift gas will be lost by often passing through diel in this way, thus zero pressure balloon is difficult to protect for a long time
Hold design flying height.Super-pressure balloon utricule is not communicated with air, and pressure difference is born by utricule caused by day and night temperature variation, is flown
Need not constantly discharge buoyance lift gas in row as zero pressure balloon, thus can for a long time design height flight (100 days with
On).Super-pressure balloon has the superiority of bigger compared with zero-pressure balloon, but its requirement to polyethylene film is also much higher, need to have
Excellent comprehensive performance.
For aerostat polyethylene film, light transmittance as high as possible, alap mist degree are usually required that.In order to avoid
During solar radiation, sphere film largely absorbs sunlight, and sphere temperature is made significantly to increase, and causes ball interior air pressure fast
Speed increases, this is very unfavorable for aerostat.It for zero-pressure balloon, needs to exclude more buoyance lift gases in utricule, contract
Its short flight time；For super-pressure balloon, superpressure amount increases, and utricule film bears pressure difference increase, once it is designed more than utricule
The pressure voltage of permission may lead to utricule deformation of thin membrane/utricule rupture.However, for polyethylene film material, light transmittance, mist
Degree is usually 80~90%, 5% or so, and it is relatively difficult for further increasing light transmittance/reduction mist degree of film.
In addition, aerostat polyethylene film is to comprehensive performance, (such as light transmittance, mechanical property, weather resistance, welding add
Work performance etc.) it is more demanding, the polyethylene film for other field is generally difficult to meet.
Utility model content
The application is from the angle of light reflection, by plating last layer aluminium film in aerostat polyethylene film outermost layer
For reflected sunlight, volume reflection can reach 90% or more, can avoid leading to sphere temperature because of sphere film absorption sunlight
Degree is apparent to be risen, significant effect.In addition, by aluminizing reflection layer in film surface increase, greatly reduce to weathering layer
The requirement of energy, can reduce the dosage of the auxiliary agents such as light stabilizer, antioxidant, improve the mechanical property of polyethylene film.
This application provides a kind of polyethylene films, including：Welding layer；Bearing layer is located on the welding layer；It is weather-proof
Layer is located on the bearing layer；Reflection layer is located on the weathering layer.
In above-mentioned polyethylene film, wherein the reflection layer is aluminium film.
In above-mentioned polyethylene film, wherein the thickness of the aluminium film is 30~300nm.
In above-mentioned polyethylene film, wherein the overall thickness of the welding layer, the bearing layer and the weathering layer is 5
~80 microns.
In above-mentioned polyethylene film, wherein the thickness of the welding layer, the bearing layer and the weathering layer accounts for described
The percentage of overall thickness is respectively 20~30%, 50~70% and 10~20%.
In above-mentioned polyethylene film, wherein the welding layer is made of linear metallocene low density polyethylene (LDPE).
In above-mentioned polyethylene film, wherein the bearing layer is high density polyethylene (HDPE), low density polyethylene (LDPE) and linear cyclopentadienyl
The blended layer of metal low density polyethylene (LDPE).
In above-mentioned polyethylene film, wherein in the bearing layer, high density polyethylene (HDPE), low density polyethylene (LDPE) and line
The mass percent that property metallocene low density polyethylene (LDPE) accounts for the bearing layer is respectively 60~80%, 10~20% and 10~
20%.
In above-mentioned polyethylene film, wherein the weathering layer is 2~5% by the mass percent for accounting for the weathering layer
Light stabilizer, 0.1~0.4% antioxidant and remaining linear metallocene low density polyethylene (LDPE) constitute.
In above-mentioned polyethylene film, wherein the light stabilizer includes salicylate, benzophenone and titanium dioxide
One or more, the antioxidant includes in butylated hydroxy anisole, dibutyl hydroxy toluene and tert-butyl hydroquinone
It is one or more.
Present invention also provides a kind of aerostat, including utricule, utricule is made by above-mentioned polyethylene film.
Polyethylene film provided by the utility model not only can avoid leading to sphere temperature because of sphere film absorption sunlight
It is apparent to rise, and the requirement to weathering layer performance is greatly reduced, the use of the auxiliary agents such as light stabilizer, antioxidant can be reduced
Amount, improves the mechanical property of polyethylene film.
Description of the drawings
Fig. 1 shows the structural schematic diagram of the polyethylene film for aerostat.
Fig. 2 shows the structural schematic diagrams of the common welding point of aerostat, wherein 5 be weld seam.
Specific implementation mode
The application is from the angle of light reflection, by plating last layer aluminium film in aerostat polyethylene film outermost layer
For reflected sunlight, volume reflection can reach 90% or more, can avoid leading to sphere temperature because of sphere film absorption sunlight
It is apparent to rise.In addition, aerostat film equally has weather resistance higher requirement, traditionally by the film
Light stabilizer, antioxidant etc. are added to improve its weather resistance, but analog assistant addition can excessively influence the mechanical property of material
Can, and aluminize reflection layer in film surface increase, not only overturned traditionally aerostat polyethylene film to light transmittance,
The requirement of mist degree, while it being greatly reduced the requirement to weathering layer performance, the auxiliary agents such as light stabilizer, antioxidant can be reduced
Dosage improves the mechanical property of polyethylene film.
As shown in Figure 1, providing a kind of aerostat polyethylene film, it includes welding layer 1, bearing layer 2, weathering layer
3 and reflection layer 4.Raw material is melted through three extruders, is plasticized, being expressed into triple extrusion die head respectively, squeezes out composite membrane-forming, is squeezed
The film gone out again through blowing, traction, folding, winding and obtain polyethylene film base material, from the inside to the outside be respectively welding layer 1,
Bearing layer 2 and weathering layer 3.Polyethylene film base material overall thickness can be 5~80 microns, and welding layer 1 is low close by linear metallocene
It spends polyethylene (MLLDPE) to constitute, accounts for the 20~30% of base material overall thickness.Bearing layer 2 is high density polyethylene (HDPE) (HDPE), low close
The blended layer for spending polyethylene (LDPE) and linear metallocene low density polyethylene (LDPE) (MLLDPE), account for base material overall thickness 50~
70%.In bearing layer 2, high density polyethylene (HDPE) (HDPE), low density polyethylene (LDPE) (LDPE) and linear metallocene low density polyethylene
The mass percent that alkene (MLLDPE) accounts for bearing layer 2 is respectively 60~80%, 10~20% and 10~20%.Weathering layer 3 is by accounting for
The mass percent of weathering layer 3 is 2~5% light stabilizer, 0.1~0.4% antioxidant and remaining linear metallocene
Low density polyethylene (LDPE) (MLLDPE) is constituted, and weathering layer 3 accounts for the 10~20% of base material overall thickness.Wherein, light stabilizer may include
Salicylate, benzophenone and titanium dioxide it is one or more；Antioxidant may include butylated hydroxy anisole (BHA),
It is one or more in dibutyl hydroxy toluene (BHT) and tert-butyl hydroquinone (TBHQ).
The base material of polyethylene film obtains aerostat polyethylene film finished product after vacuum aluminum-coated, and aluminium coated is light
The thickness in reflecting layer 4, reflection layer 4 is 30~300nm.
Structure after being welded Fig. 2 schematically shows polyethylene film.
The embodiment of the present invention also provides a kind of aerostat, including utricule, and the utricule is by polyethylene as discussed
Film is made.Aerostat in the present embodiment can be dirigible such as kite balloon airship, troposphere dirigible, flat unrestrained layer dirigible
Deng or high-altitude orange, Euler's ball etc..
The application is illustrated with reference to specific embodiment, so that those skilled in the art more fully understand this Shen
Please.
Embodiment 1
It is prepared for a kind of aerostat polyethylene film including polyethylene film base material and reflection layer.Polyethylene is thin
The thickness of film base material is 80 μm, and the thickness of reflection layer is 300nm, and welding layer 1, bearing layer 2, weathering layer 3 account for overall thickness respectively
20%, 70%, 10%.High density polyethylene (HDPE) (HDPE), low density polyethylene (LDPE) (LDPE) in bearing layer 2 and linear metallocene
The mass percent that low density polyethylene (LDPE) (MLLDPE) accounts for bearing layer 2 is respectively 80%, 10% and 10%.Light in weathering layer 3
Stabilizer is salicylate, and the mass percent for accounting for weathering layer 3 is 2%, and antioxidant is butylated hydroxy anisole (BHA), is added
Dosage is 0.1%.
Made aerostat is with polyethylene film using the light reflection in spectrophotometer measurement visible wavelength range
Rate, up to 97% or so.Mechanics Performance Testing is carried out on universal tensile machine, is as a result shown：Longitudinal mechanical properties are
40.6MPa, yield strength 16.5MPa, elongation at break 523%, lateral mechanical properties are 39.2MPa, surrender is strong
Degree is 15.7MPa, elongation at break 616%.It (wavelength 290-400nm, irradiation level 50w/ ㎡, room temperature, is put in ultraviolet ageing case
Set 360h), the sample after aging carries out Mechanics Performance Testing on universal tensile testing machine, and with the sample forces that do not carry out aging
It learns performance to be compared, obtains sample transverse and longitudinal mechanical properties after ultraviolet ageing and decline the equal ＜ of percentage 2%.
Embodiment 2
A kind of aerostat polyethylene film including polyethylene film base material and reflection layer.Polyethylene film base material
Thickness be 5 μm, the thickness of reflection layer is 30nm, welding layer 1, bearing layer 2, weathering layer 3 account for respectively overall thickness 30%,
50%, 20%.High density polyethylene (HDPE) (HDPE), low density polyethylene (LDPE) (LDPE) in bearing layer 2 and linear metallocene low-density
The mass percent that polyethylene (MLLDPE) accounts for bearing layer 2 is respectively 60%, 20% and 20%.Light stabilizer in weathering layer 3
For benzophenone, the mass percent for accounting for weathering layer 3 is 5%, and antioxidant is dibutyl hydroxy toluene (BHT), and additive amount is
0.4%.
Made aerostat is with polyethylene film using the light reflection in spectrophotometer measurement visible wavelength range
Rate, up to 90% or so.Mechanics Performance Testing is carried out on universal tensile machine, is as a result shown：Longitudinal mechanical properties are
37.3MPa, yield strength 14.1MPa, elongation at break 502%, lateral mechanical properties are 36.4MPa, surrender is strong
Degree is 13.2MPa, elongation at break 584%.It (wavelength 290-400nm, irradiation level 50w/ ㎡, room temperature, is put in ultraviolet ageing case
Set 360h), the sample after aging carries out Mechanics Performance Testing on universal tensile testing machine, and with the sample forces that do not carry out aging
It learns performance to be compared, obtains sample transverse and longitudinal mechanical properties after ultraviolet ageing and decline the equal ＜ of percentage 4%.
Embodiment 3
A kind of aerostat polyethylene film including polyethylene film base material and reflection layer.Polyethylene film base material
Thickness be 40 μm, the thickness of reflection layer is 200nm, welding layer 1, bearing layer 2, weathering layer 3 account for respectively overall thickness 25%,
60%, 15%.High density polyethylene (HDPE) (HDPE), low density polyethylene (LDPE) (LDPE) in bearing layer 2 and linear metallocene low-density
The mass percent that polyethylene (MLLDPE) accounts for bearing layer 2 is respectively 70%, 15% and 15%.Light stabilizer in weathering layer 3
For titanium dioxide, the mass percent for accounting for weathering layer 3 is 3%, and antioxidant is tert-butyl hydroquinone (TBHQ), and additive amount is
0.2%.
Made aerostat is with polyethylene film using the light reflection in spectrophotometer measurement visible wavelength range
Rate, up to 90% or so.Mechanics Performance Testing is carried out on universal tensile machine, is as a result shown：Longitudinal mechanical properties are
38.9MPa, yield strength 15.4MPa, elongation at break 515%, lateral mechanical properties are 37.5MPa, surrender is strong
Degree is 14.6MPa, elongation at break 604%.It (wavelength 290-400nm, irradiation level 50w/ ㎡, room temperature, is put in ultraviolet ageing case
Set 360h), the sample after aging carries out Mechanics Performance Testing on universal tensile testing machine, and with the sample forces that do not carry out aging
It learns performance to be compared, obtains sample transverse and longitudinal mechanical properties after ultraviolet ageing and decline the equal ＜ of percentage 2.5%.
Comparative example 1
The polyethylene film of preparation is similar to Example 1, in addition to not having aluminizer in substrate surface.
Mechanics Performance Testing is carried out on universal tensile machine, is as a result shown：Longitudinal mechanical properties are 28.2MPa, bend
Take intensity be 11.5MPa, elongation at break 400%, lateral mechanical properties are 27.5MPa, yield strength is
10.9MPa, elongation at break 490%.In ultraviolet ageing case (wavelength 290-400nm, irradiation level 50w/ ㎡, room temperature, placement
360h), the sample after aging carries out Mechanics Performance Testing on universal tensile testing machine, and with the sample mechanics that does not carry out aging
Performance is compared, and is obtained sample transverse and longitudinal mechanical properties after ultraviolet ageing and is declined the equal ＞ of percentage 10%.
Comparative example 2
The polyethylene film of preparation is similar to Example 2, in addition to not having aluminizer in substrate surface.
Mechanics Performance Testing is carried out on universal tensile machine, is as a result shown：Longitudinal mechanical properties are 26.9MPa, bend
Take intensity be 10.2MPa, elongation at break 395%, lateral mechanical properties are 26.0MPa, yield strength 9.6MPa,
Elongation at break is 475%.In ultraviolet ageing case (wavelength 290-400nm, irradiation level 50w/ ㎡, room temperature, placing 360h), aging
Sample afterwards carries out Mechanics Performance Testing on universal tensile testing machine, and carries out with the sample mechanical property for not carrying out aging pair
Than obtaining sample transverse and longitudinal mechanical properties after ultraviolet ageing and declining the equal ＞ of percentage 15%.
Comparative example 3
The polyethylene film of preparation is similar to Example 3, in addition to not having aluminizer in substrate surface.
Mechanics Performance Testing is carried out on universal tensile machine, is as a result shown：Longitudinal mechanical properties are 27.6MPa, bend
Take intensity be 11.1MPa, elongation at break 405%, lateral mechanical properties are 27.2MPa, yield strength is
10.9MPa, elongation at break 485%.In ultraviolet ageing case (wavelength 290-400nm, irradiation level 50w/ ㎡, room temperature, placement
360h), the sample after aging carries out Mechanics Performance Testing on universal tensile testing machine, and with the sample mechanics that does not carry out aging
Performance is compared, and is obtained sample transverse and longitudinal mechanical properties after ultraviolet ageing and is declined the equal ＞ of percentage 12%.
The mechanical property result of embodiment 1-3 and comparative example 1-3 is also shown in table 1 below.
Table 1
By embodiment 1-3 it is found that by plating last layer aluminium film for reflecting in aerostat polyethylene film outermost layer
Sunlight, volume reflection can reach 90% or more, can avoid causing sphere temperature obviously to rise because of sphere film absorption sunlight.
By upper table 1 it is found that being used as reflection layer, polyethylene by plating one layer of aluminium film on the substrate surface of polyethylene film
Tensile strength, elongation at break of film etc. improve significantly, while by after aging, tensile strength decline is less, says
Bright weather resistance is preferable, can meet the needs of aerostat, without by adding a greater amount of light stabilizer and antioxidant
Its weather resistance is improved, because a large amount of additions of light stabilizer and antioxidant can reduce the mechanical property of polyethylene film.
Claims (7)
1. a kind of polyethylene film, including：
Welding layer；
Bearing layer is located on the welding layer；
Weathering layer is located on the bearing layer；
Reflection layer is located on the weathering layer.
2. polyethylene film according to claim 1, which is characterized in that the reflection layer is aluminium film.
3. polyethylene film according to claim 2, which is characterized in that the thickness of the aluminium film is 30~300nm.
4. polyethylene film according to claim 1, which is characterized in that the welding layer, the bearing layer and described resistance to
The overall thickness for waiting layer is 5~80 microns.
5. polyethylene film according to claim 4, which is characterized in that the welding layer, the bearing layer and described resistance to
It is respectively 20~30%, 50~70% and 10~20% that the thickness of time layer, which accounts for the percentage of the overall thickness,.
6. polyethylene film according to claim 1, which is characterized in that the welding layer is gathered by linear metallocene low-density
Ethylene is constituted.
7. a kind of aerostat, including utricule, which is characterized in that the utricule is gathered by such as claim 1 to 6 any one of them
Vinyl film is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721523403.XU CN207825651U (en) | 2017-11-15 | 2017-11-15 | Polyethylene film and aerostat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721523403.XU CN207825651U (en) | 2017-11-15 | 2017-11-15 | Polyethylene film and aerostat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207825651U true CN207825651U (en) | 2018-09-07 |
Family
ID=63386465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721523403.XU Active CN207825651U (en) | 2017-11-15 | 2017-11-15 | Polyethylene film and aerostat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207825651U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113400608A (en) * | 2021-06-21 | 2021-09-17 | 天津新兴东方临近空间航天科技有限公司 | Multilayer composite film co-extrusion film technology of fluorine-containing resin for super-altitude balloon |
| CN113524825A (en) * | 2021-07-21 | 2021-10-22 | 天津新兴东方临近空间航天科技有限公司 | Blow molding process of multilayer co-extruded film of fluorine-containing resin for infrared hot air balloon |
| CN113580519A (en) * | 2021-06-02 | 2021-11-02 | 天津新兴东方临近空间航天科技有限公司 | Production process of fluororesin multilayer co-extrusion film with good gas barrier property |
| CN113619058A (en) * | 2021-08-12 | 2021-11-09 | 天津新兴东方临近空间航天科技有限公司 | Multilayer co-extrusion film technology for high and low temperature resistant fluororesin helium barrier film |
| CN113619059A (en) * | 2021-08-12 | 2021-11-09 | 天津新兴东方临近空间航天科技有限公司 | Ultraviolet aging resistant fluororesin helium barrier film multilayer co-extrusion film process |
-
2017
- 2017-11-15 CN CN201721523403.XU patent/CN207825651U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113580519A (en) * | 2021-06-02 | 2021-11-02 | 天津新兴东方临近空间航天科技有限公司 | Production process of fluororesin multilayer co-extrusion film with good gas barrier property |
| CN113400608A (en) * | 2021-06-21 | 2021-09-17 | 天津新兴东方临近空间航天科技有限公司 | Multilayer composite film co-extrusion film technology of fluorine-containing resin for super-altitude balloon |
| CN113524825A (en) * | 2021-07-21 | 2021-10-22 | 天津新兴东方临近空间航天科技有限公司 | Blow molding process of multilayer co-extruded film of fluorine-containing resin for infrared hot air balloon |
| CN113619058A (en) * | 2021-08-12 | 2021-11-09 | 天津新兴东方临近空间航天科技有限公司 | Multilayer co-extrusion film technology for high and low temperature resistant fluororesin helium barrier film |
| CN113619059A (en) * | 2021-08-12 | 2021-11-09 | 天津新兴东方临近空间航天科技有限公司 | Ultraviolet aging resistant fluororesin helium barrier film multilayer co-extrusion film process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207825651U (en) | Polyethylene film and aerostat | |
| CN201385779Y (en) | Inflatable rigid airship with rigid structure | |
| CN105173052A (en) | Bag skin material and aerostat | |
| CN103692737A (en) | Skin material of high-altitude aerostat and preparation method of skin material | |
| CN105538846A (en) | PE composite film and preparation method thereof, and solar back panel containing PE composite film | |
| US20220055316A1 (en) | Manufacturing of polyethylene thin films for high-altitude balloons | |
| DE102012006416A1 (en) | Metal-layer-free multilayer film with a low basis weight | |
| CN102442419A (en) | Balloon body of hot-air captive balloon | |
| US10991833B2 (en) | Laminar airfoil and the assembly and mounting of solar cell arrays on such airfoils | |
| CN106393902B (en) | A kind of envelop materials and preparation method thereof of the high-altitude aerostatics of nano modification | |
| CN103640288A (en) | Self-adhesive EVA (Ethylene-Vinyl Acetate) protective film and manufacturing process thereof | |
| CN104518042A (en) | Solar cell backboard | |
| CN106739329A (en) | A kind of novel multi-layer co-extrusion graining film and preparation method thereof | |
| CN204315599U (en) | A kind of solar cell backboard | |
| CN108556445A (en) | A kind of steel aluminium-plastic tape high bonding three-layer extrusion film and preparation method thereof | |
| CN105438439A (en) | Fluorescent unmanned aerial vehicle wing | |
| CN206856209U (en) | Edge sealing cloth is used in double glass photovoltaic module laminations | |
| WO2019065921A1 (en) | Light emitting structure and solar photovoltaic power generation system | |
| CN210148871U (en) | Composite honeycomb board | |
| CN205556535U (en) | Embossed EVA glue film | |
| Lv et al. | Study of performance of aerostat envelope materials on the coast | |
| CN204348738U (en) | Solar panel and aerostatics thereof | |
| CN104985805A (en) | Novel ribbing pneumatic membrane structure | |
| CN202414152U (en) | Balloon bag for hot-air mooring balloon | |
| CN206921836U (en) | A kind of photovoltaic cell of high reflection welding structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230808 Address after: Room 501, Building D2, Songshan Lake International Innovation and Entrepreneurship Community, Songshan Lake High tech Industrial Development Zone, Dongguan City, Guangdong Province, 523000 Patentee after: Dongguan Dongguan Institute of Science and Technology Innovation Address before: Room 502, Floor 5, Building 1, Innovation Science Park, Songshan Lake High tech Industrial Development Zone, Dongguan, Guangdong 523000 Patentee before: DONGGUAN FRONTIER TECHNOLOGY INSTITUTE |
|
| TR01 | Transfer of patent right |