CN109629978A - A kind of hollow fire resistant doorsets and preparation method thereof - Google Patents
A kind of hollow fire resistant doorsets and preparation method thereof Download PDFInfo
- Publication number
- CN109629978A CN109629978A CN201811383308.3A CN201811383308A CN109629978A CN 109629978 A CN109629978 A CN 109629978A CN 201811383308 A CN201811383308 A CN 201811383308A CN 109629978 A CN109629978 A CN 109629978A
- Authority
- CN
- China
- Prior art keywords
- fire resistant
- resistant doorsets
- steelframe
- hollow
- pillar
- 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.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/18—Layered products comprising a layer of metal comprising iron or steel
-
- 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
- B32B5/02—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 structural features of 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
- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B9/041—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of metal
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/70—Door leaves
- E06B3/72—Door leaves consisting of frame and panels, e.g. of raised panel type
- E06B3/76—Door leaves consisting of frame and panels, e.g. of raised panel type with metal panels
-
- 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
- B32B2262/106—Carbon fibres, e.g. graphite fibres
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Special Wing (AREA)
Abstract
The present invention provides a kind of hollow fire resistant doorsets and preparation method thereof, including door-plate and fire resistant doorsets edge sealing；The door-plate is by steelframe pillar and is set to the fireproof panels of steelframe pillar two sides and forms；Direction of the fireproof panel from close to the steelframe pillar to far from the steelframe pillar is successively made of heat-resisting steel sheet and plate, carbon fiber board and galvanized steel plain sheet；The airbag apparatus mutually nested with the steelframe pillar is additionally provided between the fireproof panel.The anti-flammability for improving fire resistant doorsets can be realized using the technical program, reduced the consumption of making material, mitigated the quality of fire resistant doorsets.
Description
Technical field
The present invention relates to window technology field, in particular to a kind of hollow fire resistant doorsets and preparation method thereof.
Background technique
With the development of business, miscellaneous architectural design is come into being.Build interior urgent danger prevention relevant issues
Become the very important major issue of people.All kinds of fire fighting devices improve and the relevant designs such as fire-fighting life-saving channel at
Become the necessary condition of qualified building for a building.Fire resistant doorsets are a kind of important fire-fighting equipments in building.Fire resistant doorsets are general
It is mounted on the entrance of each passageway for fire apparatus, when fire occurs, fire resistant doorsets should play the important function for preventing propagation of flame.It is anti-
Vent is to ensure that the last line of defense of the effectively escape environment such as passageway for fire apparatus, directly influences the life security of people, has
Important role.Due to special working environment and important role, the material of fire resistant doorsets is special, the material of Vehicles Collected from Market fire resistant doorsets
Material mainly includes steel and timber two major classes, and these two types of material costs are high, and density is big, thus there are materials to disappear for fire resistant doorsets in the market
The problems such as consumption is more, and quality is excessive.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art described above, a kind of hollow fire resistant doorsets and its production are provided
Method improves the anti-flammability of fire resistant doorsets, reduces the consumption of making material, mitigates the quality of fire resistant doorsets.
In order to solve the above-mentioned technical problems, the present invention provides a kind of hollow fire resistant doorsets, including door-plate and fire prevention door seal
Side；The door-plate is by steelframe pillar and is set to the fireproof panels of steelframe pillar two sides and forms；The fireproof panel leans on certainly
The nearly steelframe pillar to the direction far from the steelframe pillar is successively made of heat-resisting steel sheet and plate, carbon fiber board and galvanized steel plain sheet；
The airbag apparatus mutually nested with the steelframe pillar is additionally provided between the fireproof panel.
In a preferred embodiment, steel that the steelframe pillar is specifically made of the hollow steel pipe of more equal lengths
Frame, the both ends of the hollow steel pipe abut the fireproof panel for being set to steelframe pillar two sides respectively.
In a preferred embodiment, the steelframe pillar is formed by multiple steelframe unit spliceds；Four hollow steel pipes
One end is welded in a little described steelframe unit of composition；It is mutually staggered up and down between the steelframe unit.
In a preferred embodiment, the central axis of the hollow steel pipe and the fireproof panel for being set to steelframe pillar side
Or the angle of plane is 45 degree where the fireproof panel of the other side.
In a preferred embodiment, the airbag apparatus is the air bag of the triangular prism shape of aluminum alloy material；The air bag
Full of carbon dioxide gas.
In a preferred embodiment, between the heat-resisting steel sheet and plate and carbon fiber board and between carbon fiber board and galvanized steel plain sheet
It is bonded by epoxy resin.
The present invention also provides a kind of production methods of hollow fire resistant doorsets, using above-mentioned hollow fire resistant doorsets, packet
Include following steps:
The heat-resisting steel sheet and plate, carbon fiber board and galvanized steel plain sheet are successively bonded formation fire prevention by step 1 by epoxy resin
Panel；
One end of the hollow steel pipe is all welded in the fireproof panel by step 2, and the other end passes through inorganic ceramic
The Bi-component high-temperature resistant binder and another fireproof panel of material and modified firming agent composition bond；
Airbag apparatus is nested in the gap of the steelframe pillar by step 3；
Step 4 loads onto the fire resistant doorsets edge sealing in the side of the door-plate.
Compared to the prior art, technical solution of the present invention have it is following the utility model has the advantages that
1. current fire resistant doorsets material mainly has steel and two kinds of timber, the heat-barrier materials such as perlite are inside filled out.Although timber can
With regeneration, but the regeneration period is long, processes cumbersome.And with the exhaustion of timber resources, the cost of timber is higher and higher.With this
Meanwhile the timber used needs to carry out the fire prevention processing of chemistry, the fire-retardant processing of timber needs to use chemical material, it is also possible to make
At environmental pollution, people's demand higher and higher to environmental protection is not met.And the refining process of steel is cumbersome, refining process is also
Need to use the non-renewable resources such as coal.Largely use the protection being also unfavorable for while resource to environment.This fire resistant doorsets simultaneously
Inside is engraved structure, makees heat-blocking action without using the heat-insulated material of chemistry using the gaseous environment inside dioxide capsule
Material.This invention substantially reduces the use of steel and avoid the use of timber and heat-barrier material.Guaranteeing fire resistant doorsets fire line
Cost is effectively reduced while energy, has saved the use of resource, and reduce fire resistant doorsets material processing to environment
Pollution.
2. the corrosion resistance and intensity of timber are poor, it be easy to cause performance to decline over time.When being not achieved long
Between the requirement that uses.The present invention is pushed away using steel and novel carbon fibre material, Al alloy composite, performance with the time
It is less to move variation, has the characteristics that durable.And carbon fiber and aluminium alloy are lightweighting materials, are compared to steel and wood
Material, carbon fiber have light weight, the good feature of stability.Meanwhile the sandwich structure that steelframe pillar is formed with fireproof panel is set
Materials'use amount is being effectively reduced in meter, while largely reducing fire resistant doorsets quality, moreover it is possible to guarantee the stabilization of total.This fire prevention
Heat-proof quality in the fire resistant doorsets use process that the air bag for the aluminum alloy material filled with carbon dioxide that door uses effectively guarantees
Stabilization.The internal carbon dioxide gas filled can further prevent the sprawling of the intensity of a fire under extreme conditions simultaneously.Triangle
Stable structure design characteristic can not only guarantee that fire resistant doorsets are integrally indeformable in the use process of fire resistant doorsets usually, adequately
It has ensured its structural stability, extreme condition such as explosion wave etc. can also be resisted in a certain range when fire occurs
Effective energy-absorbing function is played in impact to fire resistant doorsets.Therefore, this fire resistant doorsets has good stability in use and lightweight etc.
Feature.
3. conventional fire door uses steel and timber, fireproof mezzanine uses perlite material.Traditional high-temperature-resistant steel is resistance to
The fiery limit is between 900 degrees Celsius to 1400 degrees Celsius.And carbon fiber under non-oxidizing atmosphere fire endurance temperature up to 3000
Degree Celsius.The propagation for the heat that the gaseous environment of hollow out steelframe and inside air bag effectively obstructs, meanwhile, high temperature carbon dioxide
The release of gas can effectively inhibit flame combustion and barrier flame propagation.With very strong practicability.
Detailed description of the invention
Fig. 1 is the front view of fire resistant doorsets in fire resistant doorsets hollow in the preferred embodiment of the present invention；
Fig. 2 is the sectional view of fire resistant doorsets middle door-plate structure hollow in the preferred embodiment of the present invention；
Fig. 3 is the enlarged fragmentary cross section of fire resistant doorsets middle door-plate structure hollow in the preferred embodiment of the present invention；
Fig. 4 is the structural schematic diagram figure of the door-plate of fire resistant doorsets in fire resistant doorsets hollow in the preferred embodiment of the present invention；
Fig. 5 is airbag apparatus structural schematic diagram in fire resistant doorsets hollow in the preferred embodiment of the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
A kind of hollow fire resistant doorsets, referring to figs. 1 to 4, including door-plate 1 and fire resistant doorsets edge sealing 2；The door-plate 1 is by steelframe branch
Column 12 and the fireproof panel 11 for being set to 12 two sides of steelframe pillar form；The fireproof panel 11 is from close to the steelframe branch
Column 12 to the direction far from the steelframe pillar 12 is successively made of heat-resisting steel sheet and plate 113, carbon fiber board 112 and galvanized steel plain sheet 111；
The airbag apparatus mutually nested with the steelframe pillar 12 is additionally provided between the fireproof panel 11.The heat-resisting steel sheet and plate 113
It is bonded between carbon fiber board 112 and between carbon fiber board 112 and galvanized steel plain sheet 111 by epoxy resin.
Current fire resistant doorsets material mainly has steel and two kinds of timber, inside fills out the heat-barrier materials such as perlite.Although timber can be with
Regeneration, but the regeneration period is long, processes cumbersome.And with the exhaustion of timber resources, the cost of timber is higher and higher.It is same with this
When, the timber used needs to carry out the fire prevention processing of chemistry, and the fire-retardant processing of timber needs to use chemical material, it is also possible to cause
Environmental pollution does not meet people's demand higher and higher to environmental protection.And the refining process of steel is cumbersome, refining process also needs
Use the non-renewable resources such as coal.Largely use the protection being also unfavorable for while resource to environment.Simultaneously in this fire resistant doorsets
Portion is engraved structure, makees heat-blocking action without using chemical heat-barrier material using the gaseous environment inside dioxide capsule.
This invention substantially reduces the use of steel and avoid the use of timber and heat-barrier material.Guaranteeing fire resistant doorsets fire protecting performance
Cost is effectively reduced simultaneously, has saved the use of resource, and reduce pollution of the fire resistant doorsets material processing to environment.
Specifically, the steelframe that the steelframe pillar 12 is specifically made of the hollow steel pipe 1211 of more equal lengths, institute
The both ends for stating hollow steel pipe 1211 abut the fireproof panel 11 for being set to 12 two sides of steelframe pillar respectively.The steelframe pillar
12 are spliced by multiple steelframe units 121；One end of four hollow steel pipes 1211 is welded in a little described steelframe unit of composition
121；It is mutually staggered up and down between the steelframe unit 121.The central axis of the hollow steel pipe 1211 and it is set to steelframe
The angle of the 11 place plane of fireproof panel of the fireproof panel 11 or other side of 12 side of pillar is 45 degree.
In order to cooperate the gap of the steelframe pillar 12, with reference to Fig. 5, the airbag apparatus is the triangular prism of aluminum alloy material
The air bag of shape；The air bag is full of carbon dioxide gas.
The corrosion resistance and intensity of timber are poor, be easy to cause performance to decline over time.It is not achieved for a long time
The requirement used.The present invention uses steel and novel carbon fibre material, Al alloy composite, and performance is as time goes by
Change less, has the characteristics that durable.And carbon fiber and aluminium alloy are lightweighting materials, are compared to steel and wood
Material, carbon fiber have light weight, the good feature of stability.Meanwhile the sandwich knot that steelframe pillar 12 and fireproof panel 11 are formed
Materials'use amount is being effectively reduced in structure design, while largely reducing fire resistant doorsets quality, moreover it is possible to guarantee the stabilization of total.This
It is heat-insulated in the fire resistant doorsets use process that the air bag for the aluminum alloy material filled with carbon dioxide that fire resistant doorsets use effectively guarantees
The stabilization of performance.The internal carbon dioxide gas filled can further prevent the sprawling of the intensity of a fire under extreme conditions simultaneously.Three
Angular stable structure design characteristic can not only guarantee that fire resistant doorsets are integrally indeformable in the use process of fire resistant doorsets usually, fill
That divides has ensured its structural stability, can also resist extreme condition such as blast impulse in a certain range when fire occurs
The impact to fire resistant doorsets such as wave, plays effective energy-absorbing function.Therefore, this fire resistant doorsets has good stability in use and light weight
The features such as change.
A kind of production method of hollow fire resistant doorsets, using above-mentioned hollow fire resistant doorsets, comprising the following steps:
Step 1 successively bonds the heat-resisting steel sheet and plate 113, carbon fiber board 112 and galvanized steel plain sheet 111 by epoxy resin
Form fireproof panel 11；
One end of the hollow steel pipe 1211 is all welded in the fireproof panel 11 by step 2, and the other end passes through nothing
The Bi-component high-temperature resistant binder and another fireproof panel 11 of machine ceramic material and modified firming agent composition bond；
Airbag apparatus is nested in the gap of the steelframe pillar 12 by step 3；
Step 4 loads onto the fire resistant doorsets edge sealing 2 in the side of the door-plate 1.
Conventional fire door uses steel and timber, and fireproof mezzanine uses perlite material.Traditional high-temperature-resistant steel fire resisting
The limit is between 900 degrees Celsius to 1400 degrees Celsius.And by fire resistant doorsets obtained by the above method, carbon fiber is in non-oxide ring
Fire endurance temperature is up to 3000 degrees Celsius under border.The heat that the gaseous environment of hollow out steelframe and inside air bag effectively obstructs
It propagates, meanwhile, the release of high temperature carbon dioxide gas can effectively inhibit flame combustion and barrier flame propagation.With very
Strong practicability.
The foregoing is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited to this,
Anyone skilled in the art in the technical scope disclosed by the present invention, using this design carries out the present invention non-
Substantive change belongs to the behavior for invading the scope of the present invention.
Claims (7)
1. a kind of hollow fire resistant doorsets, it is characterised in that including door-plate and fire resistant doorsets edge sealing；The door-plate is by steelframe pillar and sets
It is placed in the fireproof panel composition of steelframe pillar two sides；The fireproof panel is from close to the steelframe pillar to the separate steel
The direction of post setting is successively made of heat-resisting steel sheet and plate, carbon fiber board and galvanized steel plain sheet；Be additionally provided between the fireproof panel with
The mutually nested airbag apparatus of the steelframe pillar.
2. hollow fire resistant doorsets according to claim 1, which is characterized in that the steelframe pillar is specifically by more root long degree phases
Deng hollow steel pipe composition steelframe, the both ends of the hollow steel pipe abut the fire prevention for being set to steelframe pillar two sides respectively
Panel.
3. hollow fire resistant doorsets according to claim 2, which is characterized in that the steelframe pillar is spelled by multiple steelframe units
It connects；One end of four hollow steel pipes is welded in a little described steelframe unit of composition；Between the steelframe unit mutually up and down
It is staggered.
4. hollow fire resistant doorsets according to claim 3, which is characterized in that the central axis of the hollow steel pipe be set to
The angle of plane is 45 degree where the fireproof panel of steelframe pillar side or the fireproof panel of the other side.
5. hollow fire resistant doorsets according to claim 4, which is characterized in that the airbag apparatus is the three of aluminum alloy material
The air bag of prism-shaped；The air bag is full of carbon dioxide gas.
6. hollow fire resistant doorsets according to claim 5, which is characterized in that between the heat-resisting steel sheet and plate and carbon fiber board and
It is bonded between carbon fiber board and galvanized steel plain sheet by epoxy resin.
7. a kind of production method of hollow fire resistant doorsets, it is characterised in that using fire prevention hollow described in the claims 6
Door, comprising the following steps:
The heat-resisting steel sheet and plate, carbon fiber board and galvanized steel plain sheet are successively bonded by epoxy resin and form fireproof panel by step 1；
One end of the hollow steel pipe is all welded in the fireproof panel by step 2, and the other end passes through inorganic ceramic material
It is bonded with the Bi-component high-temperature resistant binder of modified firming agent composition and another fireproof panel；
Airbag apparatus is nested in the gap of the steelframe pillar by step 3；
Step 4 loads onto the fire resistant doorsets edge sealing in the side of the door-plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811383308.3A CN109629978A (en) | 2018-11-20 | 2018-11-20 | A kind of hollow fire resistant doorsets and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811383308.3A CN109629978A (en) | 2018-11-20 | 2018-11-20 | A kind of hollow fire resistant doorsets and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109629978A true CN109629978A (en) | 2019-04-16 |
Family
ID=66068432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811383308.3A Pending CN109629978A (en) | 2018-11-20 | 2018-11-20 | A kind of hollow fire resistant doorsets and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109629978A (en) |
Citations (8)
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|---|---|---|---|---|
| JP2008174931A (en) * | 2007-01-17 | 2008-07-31 | Yuki:Kk | Fire door using paulownia member |
| CN105317354A (en) * | 2014-08-05 | 2016-02-10 | 哈尔滨盛世华林科技有限公司 | Manufacturing method of luxurious fireproof and anti-explosion door |
| CN105545186A (en) * | 2016-01-29 | 2016-05-04 | 浙江新伍鑫耐火材料有限公司 | Novel fireproof door structure |
| CN206189774U (en) * | 2016-11-14 | 2017-05-24 | 苏州亨达尔工业材料有限公司 | Plate |
| CN106917575A (en) * | 2017-05-16 | 2017-07-04 | 南通金亿达门业有限公司 | A kind of high-strength fire-retardant door |
| CN206487354U (en) * | 2017-01-18 | 2017-09-12 | 中山市健家建材有限公司 | One kind fire prevention aluminium alloy door |
| CN108331330A (en) * | 2018-04-09 | 2018-07-27 | 江苏森鑫木业有限公司 | A kind of building template |
| CN207750020U (en) * | 2018-01-22 | 2018-08-21 | 桂林电子科技大学 | A kind of fire prevention shock resistance door |
-
2018
- 2018-11-20 CN CN201811383308.3A patent/CN109629978A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008174931A (en) * | 2007-01-17 | 2008-07-31 | Yuki:Kk | Fire door using paulownia member |
| CN105317354A (en) * | 2014-08-05 | 2016-02-10 | 哈尔滨盛世华林科技有限公司 | Manufacturing method of luxurious fireproof and anti-explosion door |
| CN105545186A (en) * | 2016-01-29 | 2016-05-04 | 浙江新伍鑫耐火材料有限公司 | Novel fireproof door structure |
| CN206189774U (en) * | 2016-11-14 | 2017-05-24 | 苏州亨达尔工业材料有限公司 | Plate |
| CN206487354U (en) * | 2017-01-18 | 2017-09-12 | 中山市健家建材有限公司 | One kind fire prevention aluminium alloy door |
| CN106917575A (en) * | 2017-05-16 | 2017-07-04 | 南通金亿达门业有限公司 | A kind of high-strength fire-retardant door |
| CN207750020U (en) * | 2018-01-22 | 2018-08-21 | 桂林电子科技大学 | A kind of fire prevention shock resistance door |
| CN108331330A (en) * | 2018-04-09 | 2018-07-27 | 江苏森鑫木业有限公司 | A kind of building template |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20190416 |