CN111873511A - Environment-friendly degradable sole forming process - Google Patents
Environment-friendly degradable sole forming process Download PDFInfo
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- CN111873511A CN111873511A CN202010734998.3A CN202010734998A CN111873511A CN 111873511 A CN111873511 A CN 111873511A CN 202010734998 A CN202010734998 A CN 202010734998A CN 111873511 A CN111873511 A CN 111873511A
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- sole
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/0009—Producing footwear by injection moulding; Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
- B29D35/122—Soles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of sole production processes, in particular to an environment-friendly degradable sole forming process, which comprises the following steps: the method comprises the following steps: mounting a sole forming mold on a mold frame, enabling the mold to be mounted with an injection molding machine in a matching manner, debugging the working state of the mounting mold, and preparing for forming work; step two: putting the degradable plastic for sole molding into an injection molding machine, melting the plastic through the injection molding machine, starting injection molding, and injecting the plastic into the mold cavity through a main runner, a sub-runner and a pouring channel; step three: and (3) maintaining the pressure and cooling the mold cavity, opening the lower template and the middle template after the sole formed in the mold cavity is shaped, and taking out the formed sole to finish the one-time sole forming work. The formed sole of the invention is degradable, has good quality and has good practical value and popularization value.
Description
Technical Field
The invention relates to the technical field of sole production processes, in particular to an environment-friendly degradable sole forming process.
Background
At present, in the aspect of sole production, traditional sole adopts plastics majority for nondegradable plastics, leads to shoes to wear bad back, and the sole is thrown outward, causes serious rubbish pollution, and these traditional nondegradable plastics are very unfavorable for the environmental protection.
Therefore, the development of the production process of the degradable plastic sole is very urgent in demand and has a difficult task for the modern society with increasingly urgent environmental protection requirements. The invention provides an environment-friendly degradable sole forming process, which provides a forming process for producing degradable plastic soles by reasonably improving and designing the components of sole plastics and a sole preparation process, and effectively solves the defects that soles produced by the prior art are not degradable and have serious environmental pollution.
Disclosure of Invention
The invention aims to provide the following advantages: aiming at the problems existing at present, the environment-friendly degradable sole forming process is provided, the components of sole plastics and the sole preparation process are reasonably improved and designed, the forming process for producing the degradable plastic sole is provided, and the defects that the sole produced by the prior art is not degradable and the environmental pollution is serious are effectively overcome.
In order to achieve the purpose, the invention adopts the technical scheme that:
an environment-friendly degradable sole molding process comprises the following steps:
the method comprises the following steps: mounting a sole forming mold on a mold frame, enabling the mold to be mounted with an injection molding machine in a matching manner, debugging the working state of the mounting mold, and preparing for forming work;
step two: putting the degradable plastic for sole molding into an injection molding machine, melting the plastic through the injection molding machine, starting injection molding, and injecting the plastic into the mold cavity through a main runner, a sub-runner and a pouring channel;
step three: and (3) maintaining the pressure and cooling the mold cavity, opening the lower template and the middle template after the sole formed in the mold cavity is shaped, and taking out the formed sole to finish the one-time sole forming work.
Preferably, in the first step, the forming mold comprises an upper template, a middle template and a lower template; a main runner is arranged at the center of the upper template, penetrates through the middle template and directly abuts against a contact interface between the middle template and the lower template; the two sides of the main runner are symmetrically provided with sub-runners, the transverse sections of the sub-runners are positioned between the contact interfaces of the upper template and the middle template, the longitudinal sections of the sub-runners penetrate through the middle template and directly abut against the contact interfaces between the middle template and the lower template, and the lower ends of the longitudinal sections of the sub-runners are provided with runners communicated with the die cavities on the two sides of the sub-runners; and a mold cavity for forming the sole is arranged between the contact interfaces of the lower template and the middle template.
Preferably, the die cavities are arranged in a mode that the left sole and the right sole are arranged in pairs; the number of the mold cavity arrangement pairs is more than or equal to 3; when the mold is opened, the lower mold plate and the middle mold plate are firstly opened by the forming mold, the sub-flow channels are separated from the formed sole, and then the middle mold plate and the upper mold plate are opened to separate the main flow channels and the sub-flow channels.
Preferably, the main runner is in a conical structure, and the large diameter end of the conical structure is arranged towards the direction of the lower template; the cross section of the transverse section of the sub-runner is of a semicircular structure and is arranged in the upper template; the longitudinal section of the sub-runner is arranged inside the middle template and the outer shape of the sub-runner is a conical structure; the small end of the conical diameter of the longitudinal section of the sub-runner is mutually communicated with the outer end of the transverse section of the sub-runner; the diameter of the conical small end of the longitudinal section of the sub-runner is less than or equal to the semicircular width of the transverse section of the sub-runner.
Preferably, runners are symmetrically arranged on two sides of the main runner and the sub-runners; the cross section of the pouring gate is of a semicircular structure or a square structure; the pouring gate is arranged on the middle template.
Preferably, in the second step, the degradable plastic is degradable modified polyethylene; the modified polyethylene comprises the following raw materials in parts by mass: 80-90 parts of polyethylene; 10-15 parts of a plasticizer; 8-10 parts of a stabilizer; 10-15 parts of a compatilizer; 2-3 parts of a cross-linking agent; 1-2 parts of a lubricant.
Preferably, the preparation process of the degradable plastic comprises the following steps: firstly, adding polyethylene plastics into a high-speed mixer for high-speed kneading for 8-10 minutes, when the temperature reaches 70-85 ℃, adding a stabilizer, a compatilizer, a cross-linking agent and a lubricant into the high-speed mixer for high-speed kneading, when the temperature reaches 90-95 ℃, adding a plasticizer into the high-speed mixer, and when the temperature reaches 120-130 ℃, discharging to obtain the modified polyethylene degradable plastics.
Preferably, in the second step, the melting temperature of the injection molding machine is 120-130 ℃; the injection time was 10-12 seconds.
Preferably, in the third step, the pressure maintaining time is 5-8 seconds, and the cooling mode adopts cold water circulation cooling.
When the mold is opened, the first mold opening is to separate the upper template, the middle template and the lower template from each other, and take out the sole inside the mold cavity; then, on the basis of the opened state, the upper template and the middle template are separated again, and the remnants such as the runner and the like are taken out.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
this application is on the one hand through injection mold production mode, carries out a mould multicavity shaping production to the sole, does benefit to and improves sole shaping production efficiency, has better economic value and social.
On the other hand, through the preparation and the adoption of the degradable modified polyethylene plastic, the plastic garbage generated by the shoe sole can be degraded after the shoe sole is worn out, so that the defect that the conventional shoe sole is not degradable is effectively overcome, and the environment is protected.
On the other hand, the process control is relatively simple, the mechanization degree is high, and the produced soles are compact and good in quality, wear-resistant and wear-resistant, and have good practical value and popularization value.
Drawings
FIG. 1 is a schematic side view of a mold cavity of the present invention;
FIG. 2 is a schematic view of the mold cavity and runner arrangement of the present invention;
fig. 3 is a sectional structure diagram of the flow channel of the present invention.
In the figure: 1. mounting a template; 2. a middle template; 3. a lower template; 4. a mold cavity; 5. a main flow channel; 6. a shunt channel; 7. and a pouring channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1, as shown in figures 1-3:
an environment-friendly degradable sole molding process comprises the following steps:
the method comprises the following steps: mounting a sole forming mold on a mold frame, enabling the mold to be mounted with an injection molding machine in a matching manner, debugging the working state of the mounting mold, and preparing for forming work;
step two: putting the degradable plastic for sole molding into an injection molding machine, melting the plastic through the injection molding machine, starting injection molding, and injecting the plastic into the mold cavity 4 through the main runner 5, the sub-runners 6 and the pouring channel 7;
step three: and (3) maintaining the pressure and cooling the mold cavity 4, opening the lower template 3 and the middle template 2 after the sole formed in the mold cavity 4 is shaped, and taking out the formed sole to finish the one-step sole forming work.
Preferably, in the first step, the forming mold comprises an upper template 1, a middle template 2 and a lower template 3; a main runner 5 is arranged at the center of the upper template 1, the main runner 5 penetrates through the middle template 2 and directly abuts against a contact interface between the middle template 2 and the lower template 3; the two sides of the main runner 5 are symmetrically provided with sub-runners 6, the transverse sections of the sub-runners 6 are positioned between the contact interfaces of the upper template 1 and the middle template 2, the longitudinal sections of the sub-runners 6 penetrate through the middle template 2 and are directly abutted against the contact interface between the middle template 2 and the lower template 3, and the lower ends of the longitudinal sections of the sub-runners 6 are provided with runners 7 communicated with the die cavities 4 on the two sides of the sub-runners; and a mold cavity 4 for molding the sole is arranged between the contact interface of the lower template 3 and the middle template 2.
Preferably, the mold cavity 4 is arranged in a manner that the left sole and the right sole are arranged in pairs; the number of the arranged pairs of the mold cavities 4 is more than or equal to 3; when the mold is opened, the lower mold plate 3 and the middle mold plate 2 are firstly opened by the forming mold, the sub-flow channels 6 are separated from the formed sole, and then the middle mold plate 2 and the upper mold plate 1 are opened to separate the main flow channels 5 and the sub-flow channels 6.
Preferably, the main runner 5 is in a conical structure, and the diameter large end of the conical structure is arranged towards the direction of the lower template 3; the cross section of the transverse section of the sub-runner 6 is of a semicircular structure and is arranged in the upper template 1; the longitudinal section of the sub-runner 6 is arranged inside the middle template 2, and the outer shape of the sub-runner is a conical structure; the small diameter end of the cone of the longitudinal section of the sub-runner 6 is mutually communicated with the outer end of the transverse section of the sub-runner 6; the diameter of the conical small end of the longitudinal section of the sub-runner 6 is less than or equal to the semicircular width of the transverse section of the sub-runner 6.
Preferably, runners 7 are symmetrically arranged on two sides of the main runner 5 and the sub-runners 6; the cross section of the pouring gate 7 is of a semicircular structure or a square structure; the pouring channel 7 is arranged on the middle template 2.
Preferably, in the second step, the degradable plastic is degradable modified polyethylene; the modified polyethylene comprises the following raw materials in parts by mass: 80 parts of polyethylene; 10 parts of a plasticizer; 8 parts of a stabilizer; 10 parts of a compatilizer; 2 parts of a crosslinking agent; 1 part of lubricant.
Preferably, the preparation process of the degradable plastic comprises the following steps: firstly, adding polyethylene plastics into a high-speed mixer for high-speed kneading for 8 minutes, when the temperature reaches 70 ℃, putting a stabilizer, a compatilizer, a cross-linking agent and a lubricant into the high-speed mixer for high-speed kneading, when the temperature reaches 90 ℃, putting a plasticizer into the high-speed mixer, and when the temperature reaches 120 ℃, discharging to obtain the modified polyethylene degradable plastics.
Preferably, in the second step, the melting temperature of the injection molding machine is 120 ℃; the injection time was 10 seconds.
Preferably, in the third step, the pressure maintaining time is 5 seconds, and the cooling mode adopts cold water circulation cooling.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
this application is on the one hand through injection mold production mode, carries out a mould multicavity shaping production to the sole, does benefit to and improves sole shaping production efficiency, has better economic value and social.
On the other hand, through the preparation and the adoption of the degradable modified polyethylene plastic, the plastic garbage generated by the shoe sole can be degraded after the shoe sole is worn out, so that the defect that the conventional shoe sole is not degradable is effectively overcome, and the environment is protected.
On the other hand, the process control is relatively simple, the mechanization degree is high, and the produced soles are compact and good in quality, wear-resistant and wear-resistant, and have good practical value and popularization value.
Example 2, as shown in figures 1-3:
an environment-friendly degradable sole molding process comprises the following steps:
the method comprises the following steps: mounting a sole forming mold on a mold frame, enabling the mold to be mounted with an injection molding machine in a matching manner, debugging the working state of the mounting mold, and preparing for forming work;
step two: putting the degradable plastic for sole molding into an injection molding machine, melting the plastic through the injection molding machine, starting injection molding, and injecting the plastic into the mold cavity 4 through the main runner 5, the sub-runners 6 and the pouring channel 7;
step three: keeping the pressure and cooling the die cavity 4, opening the lower template 3 and the middle template 2 after the sole formed in the die cavity 4 is shaped, and taking out the formed sole; and opening the upper template 1 and the middle template 2 for the second time to complete the second die opening, discharging the residual materials of the flow channel and completing the primary sole forming work.
Preferably, in the first step, the forming mold comprises an upper template 1, a middle template 2 and a lower template 3; a main runner 5 is arranged at the center of the upper template 1, the main runner 5 penetrates through the middle template 2 and directly abuts against a contact interface between the middle template 2 and the lower template 3; the two sides of the main runner 5 are symmetrically provided with sub-runners 6, the transverse sections of the sub-runners 6 are positioned between the contact interfaces of the upper template 1 and the middle template 2, the longitudinal sections of the sub-runners 6 penetrate through the middle template 2 and are directly abutted against the contact interface between the middle template 2 and the lower template 3, and the lower ends of the longitudinal sections of the sub-runners 6 are provided with runners 7 communicated with the die cavities 4 on the two sides of the sub-runners; and a mold cavity 4 for molding the sole is arranged between the contact interface of the lower template 3 and the middle template 2.
Preferably, the mold cavity 4 is arranged in a manner that the left sole and the right sole are arranged in pairs; the number of the arranged pairs of the mold cavities 4 is more than or equal to 3; when the mold is opened, the lower mold plate 3 and the middle mold plate 2 are firstly opened by the forming mold, the sub-flow channels 6 are separated from the formed sole, and then the middle mold plate 2 and the upper mold plate 1 are opened to separate the main flow channels 5 and the sub-flow channels 6.
Preferably, the main runner 5 is in a conical structure, and the diameter large end of the conical structure is arranged towards the direction of the lower template 3; the cross section of the transverse section of the sub-runner 6 is of a semicircular structure and is arranged in the upper template 1; the longitudinal section of the sub-runner 6 is arranged inside the middle template 2, and the outer shape of the sub-runner is a conical structure; the small diameter end of the cone of the longitudinal section of the sub-runner 6 is mutually communicated with the outer end of the transverse section of the sub-runner 6; the diameter of the conical small end of the longitudinal section of the sub-runner 6 is less than or equal to the semicircular width of the transverse section of the sub-runner 6.
Preferably, runners 7 are symmetrically arranged on two sides of the main runner 5 and the sub-runners 6; the cross section of the pouring gate 7 is of a semicircular structure or a square structure; the pouring channel 7 is arranged on the middle template 2.
Preferably, in the second step, the degradable plastic is degradable modified polyethylene; the modified polyethylene comprises the following raw materials in parts by mass: 90 parts of polyethylene; 15 parts of a plasticizer; 10 parts of a stabilizer; 15 parts of a compatilizer; 3 parts of a crosslinking agent; and 2 parts of a lubricant.
Preferably, the preparation process of the degradable plastic comprises the following steps: firstly, adding polyethylene plastics into a high-speed mixer for high-speed kneading for 10 minutes, when the temperature reaches 85 ℃, putting a stabilizer, a compatilizer, a cross-linking agent and a lubricant into the high-speed mixer for high-speed kneading, when the temperature reaches 95 ℃, putting a plasticizer into the high-speed mixer, and when the temperature reaches 130 ℃, discharging to obtain the modified polyethylene degradable plastics.
Preferably, in the second step, the melting temperature of the injection molding machine is 130 ℃; the injection time was 12 seconds.
Preferably, in the third step, the pressure maintaining time is 8 seconds, and the cooling mode adopts cold water circulation cooling.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. An environment-friendly degradable sole molding process is characterized in that: the method comprises the following steps:
the method comprises the following steps: mounting a sole forming mold on a mold frame, enabling the mold to be mounted with an injection molding machine in a matching manner, debugging the working state of the mounting mold, and preparing for forming work;
step two: putting the degradable plastic for sole molding into an injection molding machine, melting the plastic through the injection molding machine, starting injection molding, and injecting the plastic into the mold cavity through a main runner, a sub-runner and a pouring channel;
step three: and (3) maintaining the pressure and cooling the mold cavity, opening the lower template and the middle template after the sole formed in the mold cavity is shaped, and taking out the formed sole to finish the one-time sole forming work.
2. The process for molding the environment-friendly degradable sole as claimed in claim 1, wherein the process comprises the following steps: in the first step, the forming die comprises an upper template, a middle template and a lower template; a main runner is arranged at the center of the upper template, penetrates through the middle template and directly abuts against a contact interface between the middle template and the lower template; the two sides of the main runner are symmetrically provided with sub-runners, the transverse sections of the sub-runners are positioned between the contact interfaces of the upper template and the middle template, the longitudinal sections of the sub-runners penetrate through the middle template and directly abut against the contact interfaces between the middle template and the lower template, and the lower ends of the longitudinal sections of the sub-runners are provided with runners communicated with the die cavities on the two sides of the sub-runners; and a mold cavity for forming the sole is arranged between the contact interfaces of the lower template and the middle template.
3. The process for molding the environment-friendly degradable sole as claimed in claim 2, wherein the process comprises the following steps: the die cavities are arranged in a mode that the left sole and the right sole are arranged in pairs; the number of the mold cavity arrangement pairs is more than or equal to 3; when the mold is opened, the lower mold plate and the middle mold plate are firstly opened by the forming mold, the sub-flow channels are separated from the formed sole, and then the middle mold plate and the upper mold plate are opened to separate the main flow channels and the sub-flow channels.
4. The process for molding the environment-friendly degradable sole as claimed in claim 2, wherein the process comprises the following steps: the main runner is of a conical structure, and the large diameter end of the conical structure faces the direction of the lower template; the cross section of the transverse section of the sub-runner is of a semicircular structure and is arranged in the upper template; the longitudinal section of the sub-runner is arranged inside the middle template and the outer shape of the sub-runner is a conical structure; the small end of the conical diameter of the longitudinal section of the sub-runner is mutually communicated with the outer end of the transverse section of the sub-runner; the diameter of the conical small end of the longitudinal section of the sub-runner is less than or equal to the semicircular width of the transverse section of the sub-runner.
5. The process for molding the environment-friendly degradable sole as claimed in claim 2, wherein the process comprises the following steps: runners are symmetrically arranged on two sides of the main runner and the sub-runners; the cross section of the pouring gate is of a semicircular structure or a square structure; the pouring gate is arranged on the middle template.
6. The process for molding the environment-friendly degradable sole as claimed in claim 1, wherein the process comprises the following steps: in the second step, the degradable plastic is degradable modified polyethylene; the modified polyethylene comprises the following raw materials in parts by mass: 80-90 parts of polyethylene; 10-15 parts of a plasticizer; 8-10 parts of a stabilizer; 10-15 parts of a compatilizer; 2-3 parts of a cross-linking agent; 1-2 parts of a lubricant.
7. The process for molding the environment-friendly degradable sole as claimed in claim 6, wherein the process comprises the following steps: the preparation process of the degradable plastic comprises the following steps: firstly, adding polyethylene plastics into a high-speed mixer for high-speed kneading for 8-10 minutes, when the temperature reaches 70-85 ℃, adding a stabilizer, a compatilizer, a cross-linking agent and a lubricant into the high-speed mixer for high-speed kneading, when the temperature reaches 90-95 ℃, adding a plasticizer into the high-speed mixer, and when the temperature reaches 120-130 ℃, discharging to obtain the modified polyethylene degradable plastics.
8. The process for molding the environment-friendly degradable sole as claimed in claim 1, wherein the process comprises the following steps: in the second step, the melting temperature of the injection molding machine is 120-130 ℃; the injection time was 10-12 seconds.
9. The process for molding the environment-friendly degradable sole as claimed in claim 1, wherein the process comprises the following steps: in the third step, the pressure maintaining time is 5-8 seconds, and the cooling mode adopts cold water circulation cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010734998.3A CN111873511A (en) | 2020-07-28 | 2020-07-28 | Environment-friendly degradable sole forming process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010734998.3A CN111873511A (en) | 2020-07-28 | 2020-07-28 | Environment-friendly degradable sole forming process |
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| CN111873511A true CN111873511A (en) | 2020-11-03 |
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| CN202010734998.3A Pending CN111873511A (en) | 2020-07-28 | 2020-07-28 | Environment-friendly degradable sole forming process |
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| WO2005102663A1 (en) * | 2004-03-31 | 2005-11-03 | Lrm Industries, Llc | Thermoplastic molding process and apparatus |
| CN201566097U (en) * | 2009-12-30 | 2010-09-01 | 温岭市东亚塑胶有限公司 | Flow channel structure of plastic mold |
| CN102627846A (en) * | 2012-03-20 | 2012-08-08 | 黎明职业大学 | Sole material and preparation method thereof |
| CN203712982U (en) * | 2014-02-19 | 2014-07-16 | 上海登造实业有限公司 | Improvement structure of hot runner system for injection molding mold |
| US20190366668A1 (en) * | 2018-05-30 | 2019-12-05 | Nike, Inc. | Manufacturing system for a cushioning footwear |
| CN110789044A (en) * | 2019-11-06 | 2020-02-14 | 泉州市顶尖新材料有限责任公司 | Novel double-color EVA (ethylene-vinyl acetate copolymer) foaming sole molding process and molding machine |
| CN210082462U (en) * | 2019-05-08 | 2020-02-18 | 安徽省天和鞋服有限责任公司 | Sole injection molding equipment |
-
2020
- 2020-07-28 CN CN202010734998.3A patent/CN111873511A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005102663A1 (en) * | 2004-03-31 | 2005-11-03 | Lrm Industries, Llc | Thermoplastic molding process and apparatus |
| CN201566097U (en) * | 2009-12-30 | 2010-09-01 | 温岭市东亚塑胶有限公司 | Flow channel structure of plastic mold |
| CN102627846A (en) * | 2012-03-20 | 2012-08-08 | 黎明职业大学 | Sole material and preparation method thereof |
| CN203712982U (en) * | 2014-02-19 | 2014-07-16 | 上海登造实业有限公司 | Improvement structure of hot runner system for injection molding mold |
| US20190366668A1 (en) * | 2018-05-30 | 2019-12-05 | Nike, Inc. | Manufacturing system for a cushioning footwear |
| CN210082462U (en) * | 2019-05-08 | 2020-02-18 | 安徽省天和鞋服有限责任公司 | Sole injection molding equipment |
| CN110789044A (en) * | 2019-11-06 | 2020-02-14 | 泉州市顶尖新材料有限责任公司 | Novel double-color EVA (ethylene-vinyl acetate copolymer) foaming sole molding process and molding machine |
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Application publication date: 20201103 |
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