CN111978607A - Production process and method of high-elasticity damping rubber - Google Patents
Production process and method of high-elasticity damping rubber Download PDFInfo
- Publication number
- CN111978607A CN111978607A CN202010960651.0A CN202010960651A CN111978607A CN 111978607 A CN111978607 A CN 111978607A CN 202010960651 A CN202010960651 A CN 202010960651A CN 111978607 A CN111978607 A CN 111978607A
- Authority
- CN
- China
- Prior art keywords
- rubber
- internal mixer
- mixing
- iron powder
- magnetic iron
- 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
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 50
- 238000013016 damping Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000002156 mixing Methods 0.000 claims abstract description 36
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 19
- 239000012190 activator Substances 0.000 claims abstract description 16
- 239000006229 carbon black Substances 0.000 claims abstract description 16
- 239000004014 plasticizer Substances 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 150000003505 terpenes Chemical class 0.000 claims abstract description 13
- 235000007586 terpenes Nutrition 0.000 claims abstract description 13
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 10
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 10
- 229920001194 natural rubber Polymers 0.000 claims abstract description 10
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 20
- 230000003712 anti-aging effect Effects 0.000 claims description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 9
- 229910052717 sulfur Inorganic materials 0.000 claims description 9
- 239000011593 sulfur Substances 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 3
- 150000004996 alkyl benzenes Chemical class 0.000 claims description 3
- 229940077388 benzenesulfonate Drugs 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- XNGIFLGASWRNHJ-UHFFFAOYSA-N o-dicarboxybenzene Natural products OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 3
- -1 phthalic acid ester Chemical class 0.000 claims description 3
- 238000010074 rubber mixing Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 10
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 abstract description 2
- 238000010057 rubber processing Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000003963 antioxidant agent Substances 0.000 abstract 1
- 230000003078 antioxidant effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0856—Iron
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a process for producing high-elasticity damping rubber and a method thereof, wherein the process comprises the steps of raw material preparation, banbury mixer mixing treatment and finished product collection, wherein the raw material preparation comprises natural rubber, carbon black, terpene resin, plasticizer, antioxidant, activator, accelerator, vulcanizing agent and magnetic iron powder, the invention adds magnetic iron powder in the mixing process, the particle diameter of the magnetic iron powder is smaller, the gap between each particle is smaller, because of good optical, magnetic and chemical properties, and because different magnetic attraction exists among the molecular particles of the magnetic iron powder, the molecular particles can generate certain adsorption force before each other, so that the connection between the molecular particles is tighter, the raw materials can be adsorbed more tightly by adding the magnetic iron powder in the rubber processing, the quality, elasticity and strength of the damping rubber are improved, the damping rubber tool processed by the process method has good loss resistance and better performance when in use.
Description
Technical Field
The invention belongs to the technical field of damping rubber, and particularly relates to a production process and a method of high-elasticity damping rubber.
Background
The physical meaning of damping is the attenuation of force, or the dissipation of energy by an object in motion. When an object vibrates by an external force, a reaction force, called a damping force (or shock absorbing force), is generated to attenuate the external force. The ratio of it to the force is called the damping coefficient. The direction of the damping force is usually always opposite to the direction of the speed of the movement. Therefore, the larger the damping coefficient of the material is, the better the damping effect or damping effect thereof is; rubber is an ideal damping material because rubber is a macromolecular material, has a large molecular volume, causes severe internal friction under the action of external force and generates reaction force. In the process of resisting external vibration, the force weakens the amplitude of vibration on one hand, and converts mechanical energy into heat energy on the other hand, so that energy conversion is realized. The material with rubber as main body can be made into various shock-absorbing products, such as shock-absorbing parts on machines, engines, vehicles, ships and airplanes, etc.
The existing damping glue technology has the following problems: the existing damping rubber cannot meet the high-requirement damping requirement in use due to the lower damping coefficient, and the stress is easy to break in use, so that subsequent use is influenced.
Disclosure of Invention
The invention aims to provide a production process and a method of high-elasticity damping rubber, and aims to solve the problems that the existing damping rubber provided in the background art cannot meet the high-requirement damping requirement in use due to low damping coefficient, and is easy to break under stress in use to influence subsequent use.
In order to achieve the purpose, the invention provides the following technical scheme:
the production process comprises the steps of raw material preparation, mixing treatment by an internal mixer and finished product collection, wherein the raw material components in the raw material preparation comprise natural rubber, carbon black, terpene resin, a plasticizer, an anti-aging agent, an activator, an accelerator, a vulcanizing agent and magnetic iron powder, an open mill, an internal mixer and a screw continuous mixing mill can be adopted in the mixing treatment by the internal mixer, and the finished product collection is stored through a collection box.
Preferably, the raw material components comprise 5-25 parts of natural rubber, 0.5-2 parts of carbon black, 0.3-1.5 parts of terpene resin, 0.1-0.3 part of plasticizer, 0.1-1.25 parts of anti-aging agent, 0.1-1.25 parts of activator, 0.1-1.3 parts of accelerator, 0.1-1.5 parts of vulcanizing agent and 0.5-2 parts of magnetic iron powder.
Preferably, the mixing treatment steps of the internal mixer are as follows:
the method comprises the following steps: firstly, selecting a proper internal mixer for standby, checking whether the air pressure, the water pressure and the voltage of the internal mixer meet the process requirements, and checking whether the indication and the record of a temperature measurement system, a timing device and a power system are normal;
step two: accurately weighing the raw materials according to an actual formula, wherein natural rubber adopts solid rubber blocks, carbon black adopts super wear-resistant carbon black, terpene resin, plasticizer adopts phthalic acid ester, anti-aging agent adopts sodium dodecyl sulfate, activator adopts ionic surface activator linear alkyl benzene sulfonate, accelerant adopts triethanolamine, vulcanizing agent adopts sulfur and magnetic iron powder;
step three: turning on a power supply of an internal mixer, preheating the internal mixer, and starting to carry out rubber mixing after preheating for ten minutes;
step four: opening the internal mixer, putting the raw rubber cut into small blocks into the internal mixer from a feeding port, dropping an upper top bolt, and mixing the rubber for two minutes;
step five: adding terpene resin, plasticizer, anti-aging agent, activator, vulcanizing agent and magnetic iron powder, and mixing for two minutes;
step six: adding carbon black, dropping the upper top plug and mixing for three minutes;
step seven: opening the internal mixer, adding the accelerator, and dropping the upper ram bolt for mixing for two minutes;
step eight: rubber discharging, namely measuring the temperature of the rubber material by using a thermometer, and recording the initial temperature of the mixing chamber, the temperature of the mixing chamber and the rubber discharging temperature when the mixing is finished, the maximum power and the rotating speed of a rotor;
step nine: turning on a power switch to enable the open mill to operate, opening a circulating water valve, feeding the rubber material discharged from the internal mixer to an upper wrapping roller of the open mill, adding sulfur serving as a vulcanizing agent when the temperature of the rubber material is reduced to be below 100 ℃, cutting left and right cutters twice respectively, allowing the sulfur to be eaten completely, enabling the surface of the rubber material to be smooth, and cutting the rubber material to be processed into different shapes according to requirements.
Compared with the prior art, the invention provides a production process and a method of high-elasticity damping rubber, and the production process and the method have the following beneficial effects:
according to the invention, the magnetic iron powder is added in the material mixing process, firstly, the particle diameter of the magnetic iron powder is smaller, gaps among particles are smaller, the magnetic iron powder has good optical, magnetic and chemical properties, and different magnetic attraction forces exist among molecular particles of the magnetic iron powder, so that the molecular particles generate certain adsorption force before each other, the connection among the molecular particles is tighter, the magnetic iron powder is added into the raw materials after rubber processing, the adsorption among the raw materials can be tighter, the quality, elasticity and strength of the damping rubber are improved, the damping rubber processed by the process method has good loss resistance and elasticity when in use, the probability of damage during use is smaller, and the performance is better.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that:
a production process and a method of high-elasticity damping rubber comprise raw material preparation, mixing treatment by an internal mixer and finished product collection, wherein the raw material preparation comprises natural rubber, carbon black, terpene resin, plasticizer, anti-aging agent, activator, accelerator, vulcanizing agent and magnetic iron powder, an open mill, an internal mixer and a screw continuous mixing mill can be adopted in the mixing treatment by the internal mixer, and the finished product collection is stored by a collection box; the raw material components comprise 5-25 parts of natural rubber, 0.5-2 parts of carbon black, 0.3-1.5 parts of terpene resin, 0.1-0.3 part of plasticizer, 0.1-1.25 parts of anti-aging agent, 0.1-1.25 parts of activator, 0.1-1.3 parts of accelerator, 0.1-1.5 parts of vulcanizing agent and 0.5-2 parts of magnetic iron powder.
The mixing treatment steps of the internal mixer are as follows:
the method comprises the following steps: firstly, selecting a proper internal mixer for standby, checking whether the air pressure, the water pressure and the voltage of the internal mixer meet the process requirements, and checking whether the indication and the record of a temperature measurement system, a timing device and a power system are normal;
step two: accurately weighing the raw materials according to an actual formula, wherein natural rubber adopts solid rubber blocks, carbon black adopts super wear-resistant carbon black, terpene resin, plasticizer adopts phthalic acid ester, anti-aging agent adopts sodium dodecyl sulfate, activator adopts ionic surface activator linear alkyl benzene sulfonate, accelerant adopts triethanolamine, vulcanizing agent adopts sulfur and magnetic iron powder;
step three: turning on a power supply of an internal mixer, preheating the internal mixer, and starting to carry out rubber mixing after preheating for ten minutes;
step four: opening the internal mixer, putting the raw rubber cut into small blocks into the internal mixer from a feeding port, dropping an upper top bolt, and mixing the rubber for two minutes;
step five: adding terpene resin, plasticizer, anti-aging agent, activator, vulcanizing agent and magnetic iron powder, and mixing for two minutes;
step six: adding carbon black, dropping the upper top plug and mixing for three minutes;
step seven: opening the internal mixer, adding the accelerator, and dropping the upper ram bolt for mixing for two minutes;
step eight: rubber discharging, namely measuring the temperature of the rubber material by using a thermometer, and recording the initial temperature of the mixing chamber, the temperature of the mixing chamber and the rubber discharging temperature when the mixing is finished, the maximum power and the rotating speed of a rotor;
step nine: turning on a power switch to enable the open mill to operate, opening a circulating water valve, feeding the rubber material discharged from the internal mixer to an upper wrapping roller of the open mill, adding sulfur serving as a vulcanizing agent when the temperature of the rubber material is reduced to be below 100 ℃, cutting left and right cutters twice respectively, allowing the sulfur to be eaten completely, enabling the surface of the rubber material to be smooth, and cutting the rubber material to be processed into different shapes according to requirements.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A production process and a method of high-elasticity damping rubber are disclosed, wherein the process comprises the steps of raw material preparation, mixing treatment by an internal mixer and finished product collection, and is characterized in that: the raw material preparation comprises the raw material components of natural rubber, carbon black, terpene resin, plasticizer, anti-aging agent, activator, accelerator, vulcanizing agent and magnetic iron powder, an open mill, an internal mixer and a screw continuous mixing mill can be adopted in the mixing treatment of the internal mixer, and the finished product is collected and stored through a collection box.
2. The production process and the method of the high-elasticity damping rubber according to claim 1 are characterized in that: the raw material components comprise, by weight, 5-25 parts of natural rubber, 0.5-2 parts of carbon black, 0.3-1.5 parts of terpene resin, 0.1-0.3 part of plasticizer, 0.1-1.25 parts of anti-aging agent, 0.1-1.25 parts of activator, 0.1-1.3 parts of accelerator, 0.1-1.5 parts of vulcanizing agent and 0.5-2 parts of magnetic iron powder.
3. The production process and the method of the high-elasticity damping rubber according to claim 1 are characterized in that: the mixing treatment steps of the internal mixer are as follows:
the method comprises the following steps: firstly, selecting a proper internal mixer for standby, checking whether the air pressure, the water pressure and the voltage of the internal mixer meet the process requirements, and checking whether the indication and the record of a temperature measurement system, a timing device and a power system are normal;
step two: accurately weighing the raw materials according to an actual formula, wherein natural rubber adopts solid rubber blocks, carbon black adopts super wear-resistant carbon black, terpene resin, plasticizer adopts phthalic acid ester, anti-aging agent adopts sodium dodecyl sulfate, activator adopts ionic surface activator linear alkyl benzene sulfonate, accelerant adopts triethanolamine, vulcanizing agent adopts sulfur and magnetic iron powder;
step three: turning on a power supply of an internal mixer, preheating the internal mixer, and starting to carry out rubber mixing after preheating for ten minutes;
step four: opening the internal mixer, putting the raw rubber cut into small blocks into the internal mixer from a feeding port, dropping an upper top bolt, and mixing the rubber for two minutes;
step five: adding terpene resin, plasticizer, anti-aging agent, activator, vulcanizing agent and magnetic iron powder, and mixing for two minutes;
step six: adding carbon black, dropping the upper top plug and mixing for three minutes;
step seven: opening the internal mixer, adding the accelerator, and dropping the upper ram bolt for mixing for two minutes;
step eight: rubber discharging, namely measuring the temperature of the rubber material by using a thermometer, and recording the initial temperature of the mixing chamber, the temperature of the mixing chamber and the rubber discharging temperature when the mixing is finished, the maximum power and the rotating speed of a rotor;
step nine: turning on a power switch to enable the open mill to operate, opening a circulating water valve, feeding the rubber material discharged from the internal mixer to an upper wrapping roller of the open mill, adding sulfur serving as a vulcanizing agent when the temperature of the rubber material is reduced to be below 100 ℃, cutting left and right cutters twice respectively, allowing the sulfur to be eaten completely, enabling the surface of the rubber material to be smooth, and cutting the rubber material to be processed into different shapes according to requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010960651.0A CN111978607A (en) | 2020-09-14 | 2020-09-14 | Production process and method of high-elasticity damping rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010960651.0A CN111978607A (en) | 2020-09-14 | 2020-09-14 | Production process and method of high-elasticity damping rubber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111978607A true CN111978607A (en) | 2020-11-24 |
Family
ID=73450699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010960651.0A Pending CN111978607A (en) | 2020-09-14 | 2020-09-14 | Production process and method of high-elasticity damping rubber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111978607A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504353A (en) * | 2011-10-12 | 2012-06-20 | 北京市长城机床附件有限责任公司 | 60-degree natural rubber and production process thereof |
| CN106957462A (en) * | 2017-05-09 | 2017-07-18 | 广德天运新技术股份有限公司 | A kind of utilization waste old production prevents the damping sheets of resonance |
| CN107227023A (en) * | 2016-03-25 | 2017-10-03 | 富士高分子工业株式会社 | Magnetic rheology elastic body composition, its manufacture method and the shock arrester (-tor) for being incorporated with said composition |
| CN107236161A (en) * | 2017-05-31 | 2017-10-10 | 广东工业大学 | A kind of high heat conduction electromagnetic shield rubber and its preparation method and application |
-
2020
- 2020-09-14 CN CN202010960651.0A patent/CN111978607A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504353A (en) * | 2011-10-12 | 2012-06-20 | 北京市长城机床附件有限责任公司 | 60-degree natural rubber and production process thereof |
| CN107227023A (en) * | 2016-03-25 | 2017-10-03 | 富士高分子工业株式会社 | Magnetic rheology elastic body composition, its manufacture method and the shock arrester (-tor) for being incorporated with said composition |
| CN106957462A (en) * | 2017-05-09 | 2017-07-18 | 广德天运新技术股份有限公司 | A kind of utilization waste old production prevents the damping sheets of resonance |
| CN107236161A (en) * | 2017-05-31 | 2017-10-10 | 广东工业大学 | A kind of high heat conduction electromagnetic shield rubber and its preparation method and application |
Non-Patent Citations (3)
| Title |
|---|
| 徐子钦等: "硫化体系对天然橡胶基磁流变弹性体性能的影响", 《合成橡胶工业》 * |
| 程凯等: "不同配合剂对MRE性能的影响", 《信息记录材料》 * |
| 许金楼等: "羰基铁粉/天然橡胶磁流变弹性体的结构与性能", 《合成橡胶工业》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109251379B (en) | Low-filling high-performance tire tread rubber material and tire | |
| CN102731916B (en) | Reclaimed EPDM rubber mixed rubber sealing ring | |
| CN102146172A (en) | Super wear-resistant rubber-plastic conveyer belt | |
| CN109666194A (en) | Wear-resisting ageing-resistant high-strength natural rubber of one kind and the preparation method and application thereof | |
| CN111978607A (en) | Production process and method of high-elasticity damping rubber | |
| CN110272594B (en) | High-wear-resistance high-temperature-resistance rubber and preparation method thereof | |
| CN102993506A (en) | High-strength shock-absorbing rubber plate for factory equipment | |
| CN104072853B (en) | Sheath material for wire and cable | |
| CN108250510A (en) | A kind of high-speed railway rail seal ball-valve of resistance to extremely low temperature rubber and preparation method thereof | |
| CN102700038A (en) | Vertical centrifugal casting technology for high-performance high-molecular sealing drum material | |
| Liu et al. | Application of lignin as antioxidant in styrene butadiene rubber composite | |
| CN110591261B (en) | Pre-dispersed masterbatch of vulcanization crosslinking activator of acrylate rubber and preparation method thereof | |
| CN118580690A (en) | Antiaging agent masterbatch and its preparation method and application | |
| CN114437416A (en) | Vibration damping rubber and preparation method thereof | |
| CN105924708A (en) | Environment-friendly silica gel material | |
| CN105860396A (en) | High-damping rubber and preparation method thereof | |
| CN117567798B (en) | Expansion plugging material and preparation method thereof | |
| CN112409658A (en) | Anti-aging insulating skin and preparation method thereof | |
| CN121343250A (en) | Energy-absorbing and shock-absorbing rubber material for ocean platform and preparation method thereof | |
| CN115558173B (en) | Application of industrial lignin as cutting-resistant functional auxiliary agent in preparation of cutting-resistant tire material | |
| CN112778585B (en) | Positioning node rubber composition and preparation method thereof | |
| CN119639140A (en) | A wide temperature range high damping rubber composite material and preparation method thereof | |
| CN105037791A (en) | Process for producing wear-resistant highly-elastic butyl chloride regenerated rubber | |
| CN104109395A (en) | Cold-resistant and water-resistant rubber material | |
| CN105061875A (en) | Wear-resistant cable material for large power and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201124 |