CN112322061A - Straw composite material degradable lunch box and preparation process thereof - Google Patents
Straw composite material degradable lunch box and preparation process thereof Download PDFInfo
- Publication number
- CN112322061A CN112322061A CN202011032689.8A CN202011032689A CN112322061A CN 112322061 A CN112322061 A CN 112322061A CN 202011032689 A CN202011032689 A CN 202011032689A CN 112322061 A CN112322061 A CN 112322061A
- Authority
- CN
- China
- Prior art keywords
- parts
- straw
- lunch box
- raw materials
- composite
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Biological Depolymerization Polymers (AREA)
- Wrappers (AREA)
Abstract
The invention discloses a straw composite material degradable lunch box and a preparation process thereof, belonging to the technical field of degradable lunch boxes and comprising the following components in parts by weight: 20-30 parts of starch, 30-40 parts of straw, 5-10 parts of silk fibroin fiber, 20-30 parts of composite biochar, 10-20 parts of polyethylene, 10-20 parts of lignocellulose aerogel, 10-20 parts of polylactic acid and 5-8 parts of a coupling agent. The addition of the composite biochar, the starch and the straw can reduce the use of polyethylene, so that the use of raw materials is reduced, and the environment-friendly effect is achieved; the added lignocellulose aerogel can be mixed with the starch and the straws to be wrapped, so that the water and oil leakage is prevented.
Description
Technical Field
The invention relates to a degradable lunch box and a preparation process thereof, in particular to a straw composite material degradable lunch box and a preparation process thereof, belonging to the technical field of degradable lunch boxes.
Background
The degradable lunch box is tableware which can generate biochemical reaction under the action of natural environment microorganisms and enzymes to cause the appearance to be mildewed to change to the internal quality and finally form carbon dioxide and water.
The existing degradable lunch box has the following defects: the existing degradable lunch box is easy to leak in the using process, which causes the food to spill.
Disclosure of Invention
The invention mainly aims to solve the defects of the prior art and provides a straw composite material degradable lunch box and a preparation process thereof.
The purpose of the invention can be achieved by adopting the following technical scheme:
a straw composite material degradable lunch box comprises the following components in parts by weight: 20-30 parts of starch, 30-40 parts of straw, 5-10 parts of silk fibroin fiber, 20-30 parts of composite biochar, 10-20 parts of polyethylene, 10-20 parts of lignocellulose aerogel, 10-20 parts of polylactic acid and 5-8 parts of a coupling agent.
Preferably, the composition comprises the following components in parts by weight: 20-25 parts of starch, 30-35 parts of straw, 5-8 parts of silk fibroin fiber, 20-25 parts of composite biochar, 15-20 parts of polyethylene, 10-20 parts of lignocellulose aerogel, 10-15 parts of polylactic acid and 5-8 parts of a coupling agent.
Preferably, the composition comprises the following components in parts by weight: 23 parts of starch, 32 parts of straw, 7 parts of silk fibroin fiber, 24 parts of composite biochar, 18 parts of polyethylene, 18 parts of lignocellulose aerogel, 13 parts of polylactic acid and 7 parts of coupling agent.
Preferably, the silk fibroin fibers are degummed in a sodium carbonate solution for 3-4 times during adding.
Preferably, the composite biochar is a mixture formed by mixing and fermenting wheat straws, seed shells, excrement and sludge.
Preferably, the addition ratio of the lignocellulose aerogel to the polylactic acid is 1: 1.
Preferably, the coupling agent is a titanate or a monoalkoxy titanate.
Preferably, the adding ratio of the starch, the straw and the polyethylene is 2:1: 3.
A preparation method of a straw composite material degradable lunch box comprises the following steps:
step 1: taking raw materials of starch, straws, silk fibroin fibers, composite biochar, polyethylene, lignocellulose aerogel, polylactic acid and a coupling agent;
step 2: pulping and mixing the raw materials, and stirring and mixing the mixed raw materials at 80-120 ℃;
and step 3: and (3) feeding the mixed raw materials into a grinding tool forming machine for film pressing, and pressing and forming at 80-95 ℃.
Preferably, in the step 2, the pulped and mixed raw materials are sieved, and the fineness of the sieved raw materials is 100-150 meshes.
The invention has the beneficial technical effects that: according to the straw composite material degradable lunch box and the preparation process, the composite biochar, the starch and the straw are added to reduce the use of polyethylene, so that the use of raw materials is reduced, and the straw composite material degradable lunch box is green and environment-friendly; the added lignocellulose aerogel can be mixed with the starch and the straws to be wrapped, so that the water and oil leakage is prevented.
Detailed Description
In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail with reference to the following examples, but the embodiments of the present invention are not limited thereto.
The straw composite material degradable lunch box that this embodiment provided, by weight, includes: 20-30 parts of starch, 30-40 parts of straw, 5-10 parts of silk fibroin fiber, 20-30 parts of composite biochar, 10-20 parts of polyethylene, 10-20 parts of lignocellulose aerogel, 10-20 parts of polylactic acid and 5-8 parts of a coupling agent.
Comprises the following components in parts by weight: 20-25 parts of starch, 30-35 parts of straw, 5-8 parts of silk fibroin fiber, 20-25 parts of composite biochar, 15-20 parts of polyethylene, 10-20 parts of lignocellulose aerogel, 10-15 parts of polylactic acid and 5-8 parts of a coupling agent.
Comprises the following components in parts by weight: 23 parts of starch, 32 parts of straw, 7 parts of silk fibroin fiber, 24 parts of composite biochar, 18 parts of polyethylene, 18 parts of lignocellulose aerogel, 13 parts of polylactic acid and 7 parts of coupling agent.
And degumming the silk fibroin fibers in a sodium carbonate solution for 3-4 times during adding. The composite biochar is a mixture formed by mixing and fermenting wheat straws, seed shells, excrement and sludge. The addition ratio of the lignocellulose aerogel to the polylactic acid is 1: 1. The coupling agent is titanate or mono-alkoxy titanate. The adding proportion of the starch, the straw and the polyethylene is 2:1: 3.
A preparation method of a straw composite material degradable lunch box comprises the following steps:
step 1: taking raw materials of starch, straws, silk fibroin fibers, composite biochar, polyethylene, lignocellulose aerogel, polylactic acid and a coupling agent;
step 2: pulping and mixing the raw materials, and stirring and mixing the mixed raw materials at 80-120 ℃;
and step 3: and (3) feeding the mixed raw materials into a grinding tool forming machine for film pressing, and pressing and forming at 80-95 ℃.
In the step 2, the pulped and mixed raw materials are sieved, and the fineness of the sieved raw materials is 100-150 meshes.
Example 1:
a straw composite material degradable lunch box comprises the following components in parts by weight: 20 parts of starch, 30 parts of straw, 5 parts of silk fibroin fiber, 20 parts of composite biochar, 10 parts of polyethylene, 10 parts of lignocellulose aerogel, 10 parts of polylactic acid and 5 parts of coupling agent.
A preparation method of a straw composite material degradable lunch box comprises the following steps:
step 1: taking raw materials of starch, straws, silk fibroin fibers, composite biochar, polyethylene, lignocellulose aerogel, polylactic acid and a coupling agent;
step 2: pulping and mixing the raw materials, and stirring and mixing the mixed raw materials at 80-120 ℃;
and step 3: and (3) feeding the mixed raw materials into a grinding tool forming machine for film pressing, and pressing and forming at 80-95 ℃.
Example 2:
a straw composite material degradable lunch box comprises the following components in parts by weight: 22 parts of starch, 32 parts of straw, 6 parts of silk fibroin fiber, 22 parts of composite biochar, 12 parts of polyethylene, 12 parts of lignocellulose aerogel, 12 parts of polylactic acid and 5.5 parts of a coupling agent.
A preparation method of a straw composite material degradable lunch box comprises the following steps:
step 1: taking raw materials of starch, straws, silk fibroin fibers, composite biochar, polyethylene, lignocellulose aerogel, polylactic acid and a coupling agent;
step 2: pulping and mixing the raw materials, and stirring and mixing the mixed raw materials at 80-120 ℃;
and step 3: and (3) feeding the mixed raw materials into a grinding tool forming machine for film pressing, and pressing and forming at 80-95 ℃.
Example 3:
a straw composite material degradable lunch box comprises the following components in parts by weight: 24 parts of starch, 34 parts of straw, 6 parts of silk fibroin fiber, 24 parts of composite biochar, 14 parts of polyethylene, 14 parts of lignocellulose aerogel, 14 parts of polylactic acid and 6 parts of coupling agent.
A preparation method of a straw composite material degradable lunch box comprises the following steps:
step 1: starch, straw, silk fibroin fiber, composite biochar, polyethylene, lignocellulose aerogel, polylactic acid and a coupling agent;
step 2: pulping and mixing the raw materials, and stirring and mixing the mixed raw materials at 80-120 ℃;
and step 3: and (3) feeding the mixed raw materials into a grinding tool forming machine for film pressing, and pressing and forming at 80-95 ℃.
Example 4:
a straw composite material degradable lunch box comprises the following components in parts by weight: 23 parts of starch, 32 parts of straw, 7 parts of silk fibroin fiber, 24 parts of composite biochar, 18 parts of polyethylene, 18 parts of lignocellulose aerogel, 13 parts of polylactic acid and 7 parts of coupling agent.
A preparation method of a straw composite material degradable lunch box comprises the following steps:
step 1: taking raw materials of starch, straws, silk fibroin fibers, composite biochar, polyethylene, lignocellulose aerogel, polylactic acid and a coupling agent;
step 2: pulping and mixing the raw materials, and stirring and mixing the mixed raw materials at 80-120 ℃;
and step 3: and (3) feeding the mixed raw materials into a grinding tool forming machine for film pressing, and pressing and forming at 80-95 ℃.
Example 5:
a straw composite material degradable lunch box comprises the following components in parts by weight: 28 parts of starch, 38 parts of straw, 8 parts of silk fibroin fiber, 28 parts of composite biochar, 18 parts of polyethylene, 18 parts of lignocellulose aerogel, 18 parts of polylactic acid and 7 parts of coupling agent.
A preparation method of a straw composite material degradable lunch box comprises the following steps:
step 1: taking raw materials of starch, straws, silk fibroin fibers, composite biochar, polyethylene, lignocellulose aerogel, polylactic acid and a coupling agent;
step 2: pulping and mixing the raw materials, and stirring and mixing the mixed raw materials at 80-120 ℃;
and step 3: and (3) feeding the mixed raw materials into a grinding tool forming machine for film pressing, and pressing and forming at 80-95 ℃.
Example 6:
a straw composite material degradable lunch box comprises the following components in parts by weight: 30 parts of starch, 40 parts of straw, 10 parts of silk fibroin fiber, 30 parts of composite biochar, 20 parts of polyethylene, 20 parts of lignocellulose aerogel, 20 parts of polylactic acid and 8 parts of coupling agent.
A preparation method of a straw composite material degradable lunch box comprises the following steps:
step 1: taking raw materials of starch, straws, silk fibroin fibers, composite biochar, polyethylene, lignocellulose aerogel, polylactic acid and a coupling agent;
step 2: pulping and mixing the raw materials, and stirring and mixing the mixed raw materials at 80-120 ℃;
and step 3: and (3) feeding the mixed raw materials into a grinding tool forming machine for film pressing, and pressing and forming at 80-95 ℃.
In summary, in this embodiment, according to the straw composite degradable lunch box and the preparation process of this embodiment, and the straw composite degradable lunch box and the preparation process of this embodiment, as can be seen from embodiments 1 to 6, the straw composite degradable lunch box prepared in embodiment 4 has the best water-proof and oil-proof effects, and the use of polyethylene can be reduced by adding the composite biochar, starch and straw, which not only reduces the use of raw materials, but also is green and environment-friendly; the added lignocellulose aerogel can be mixed with the starch and the straws to be wrapped, so that the water and oil leakage is prevented.
The above description is only for the purpose of illustrating the present invention and is not intended to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution of the present invention and its conception within the scope of the present invention.
Claims (10)
1. The straw composite material degradable lunch box is characterized by comprising the following components in parts by weight: 20-30 parts of starch, 30-40 parts of straw, 5-10 parts of silk fibroin fiber, 20-30 parts of composite biochar, 10-20 parts of polyethylene, 10-20 parts of lignocellulose aerogel, 10-20 parts of polylactic acid and 5-8 parts of a coupling agent.
2. The straw composite degradable lunch box of claim 1, comprising the following components in parts by weight: 20-25 parts of starch, 30-35 parts of straw, 5-8 parts of silk fibroin fiber, 20-25 parts of composite biochar, 15-20 parts of polyethylene, 10-20 parts of lignocellulose aerogel, 10-15 parts of polylactic acid and 5-8 parts of a coupling agent.
3. The straw composite degradable lunch box of claim 1, comprising the following components in parts by weight: 23 parts of starch, 32 parts of straw, 7 parts of silk fibroin fiber, 24 parts of composite biochar, 18 parts of polyethylene, 18 parts of lignocellulose aerogel, 13 parts of polylactic acid and 7 parts of coupling agent.
4. The straw composite material degradable lunch box according to claim 1, wherein the silk fibroin fiber is firstly degummed in a sodium carbonate solution for 3-4 times when being added.
5. The straw composite material degradable lunch box of claim 1, wherein the composite biochar is a mixture formed by mixing and fermenting wheat straws, seed shells, excrement and sludge.
6. The straw composite degradable lunch box of claim 1, wherein the addition ratio of the lignocellulose aerogel to the polylactic acid is 1: 1.
7. The straw composite degradable lunch box of claim 1, wherein the coupling agent is titanate or mono-alkoxy titanate.
8. The straw composite degradable lunch box of claim 1, wherein the starch, the straw and the polyethylene are added in a ratio of 2:1: 3.
9. A preparation method of a straw composite material degradable lunch box is characterized by comprising the following steps:
step 1: taking raw materials of starch, straws, silk fibroin fibers, composite biochar, polyethylene, lignocellulose aerogel, polylactic acid and a coupling agent;
step 2: pulping and mixing the raw materials, and stirring and mixing the mixed raw materials at 80-120 ℃;
and step 3: and (3) feeding the mixed raw materials into a grinding tool forming machine for film pressing, and pressing and forming at 80-95 ℃.
10. The preparation method of the straw composite degradable lunch box according to claim 9, wherein in the step 2, the pulped and mixed raw materials are sieved, and the fineness of the sieved raw materials is 100-150 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011032689.8A CN112322061A (en) | 2020-09-27 | 2020-09-27 | Straw composite material degradable lunch box and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011032689.8A CN112322061A (en) | 2020-09-27 | 2020-09-27 | Straw composite material degradable lunch box and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112322061A true CN112322061A (en) | 2021-02-05 |
Family
ID=74303399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011032689.8A Pending CN112322061A (en) | 2020-09-27 | 2020-09-27 | Straw composite material degradable lunch box and preparation process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112322061A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113388163A (en) * | 2021-06-16 | 2021-09-14 | 贵州海跃食品包装有限责任公司 | Starch-based degradable lunch box and forming method thereof |
| CN113603938A (en) * | 2021-07-30 | 2021-11-05 | 宁夏禾易源生物科技有限公司 | Starch-based degradable safe and environment-friendly packaging box and preparation method thereof |
| CN117004094A (en) * | 2023-09-01 | 2023-11-07 | 河南奥尼斯帝新材料有限公司 | Starch-based foaming composition, starch-based foaming product and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229750A (en) * | 2011-06-28 | 2011-11-02 | 刘立文 | Modified polypropylene composite material and preparation technology thereof |
| CN102417687A (en) * | 2011-06-21 | 2012-04-18 | 刘立文 | Modified impact-resistant polystyrene composite material and preparation technique thereof |
| CN104592558A (en) * | 2015-02-04 | 2015-05-06 | 哈尔滨绿环生物降解制品开发有限公司 | Comprehensive resource utilization type photo-biodegradable environment-friendly material and preparation method thereof |
| CN107118434A (en) * | 2017-05-05 | 2017-09-01 | 周瑾 | The process of degradable dinner set is made in a kind of stalk and plastic cement |
| CN107254095A (en) * | 2017-08-02 | 2017-10-17 | 合肥市大卓电力有限责任公司 | Degradable Novel environment-friendlymaterial material of a kind of high mechanical strength and preparation method thereof |
| CN107603174A (en) * | 2017-08-08 | 2018-01-19 | 安徽泰诺塑胶有限公司 | A kind of degradable once plastic cup |
-
2020
- 2020-09-27 CN CN202011032689.8A patent/CN112322061A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417687A (en) * | 2011-06-21 | 2012-04-18 | 刘立文 | Modified impact-resistant polystyrene composite material and preparation technique thereof |
| CN102229750A (en) * | 2011-06-28 | 2011-11-02 | 刘立文 | Modified polypropylene composite material and preparation technology thereof |
| CN104592558A (en) * | 2015-02-04 | 2015-05-06 | 哈尔滨绿环生物降解制品开发有限公司 | Comprehensive resource utilization type photo-biodegradable environment-friendly material and preparation method thereof |
| CN107118434A (en) * | 2017-05-05 | 2017-09-01 | 周瑾 | The process of degradable dinner set is made in a kind of stalk and plastic cement |
| CN107254095A (en) * | 2017-08-02 | 2017-10-17 | 合肥市大卓电力有限责任公司 | Degradable Novel environment-friendlymaterial material of a kind of high mechanical strength and preparation method thereof |
| CN107603174A (en) * | 2017-08-08 | 2018-01-19 | 安徽泰诺塑胶有限公司 | A kind of degradable once plastic cup |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113388163A (en) * | 2021-06-16 | 2021-09-14 | 贵州海跃食品包装有限责任公司 | Starch-based degradable lunch box and forming method thereof |
| CN113603938A (en) * | 2021-07-30 | 2021-11-05 | 宁夏禾易源生物科技有限公司 | Starch-based degradable safe and environment-friendly packaging box and preparation method thereof |
| CN117004094A (en) * | 2023-09-01 | 2023-11-07 | 河南奥尼斯帝新材料有限公司 | Starch-based foaming composition, starch-based foaming product and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112322061A (en) | Straw composite material degradable lunch box and preparation process thereof | |
| Singh et al. | A review on management of rice straw by use of cleaner technologies: Abundant opportunities and expectations for Indian farming | |
| Gupta et al. | Biomass conversion of agricultural waste residues for different applications: a comprehensive review | |
| AU9093598A (en) | Method of bioconversion of industrial or agricultural cellulose containing wastes | |
| CN104025909A (en) | Method of culturing biodegradable packaging material through inoculated edible fungus | |
| CN108559564B (en) | Preparation method of waterproof biomass briquette binder | |
| CN106633989B (en) | Using bagasse as fungi based biomass packaging material of major ingredient and preparation method thereof | |
| CN110205873A (en) | A kind of coffee grounds carton material and preparation method thereof | |
| CN100491465C (en) | Preparation method of ramie stem and plastic composite material | |
| CN108503929A (en) | A kind of oyster shell whiting biodegradable plastic and preparation method | |
| CN111074660A (en) | Degradable sugarcane pulp tableware and preparation method thereof | |
| CN102475353A (en) | Tobacco stalk fiber substance as well as preparation method and application thereof | |
| CN103556519B (en) | A kind of biological complex enzyme biochemical agent and for the preparation method of straw biological paper pulp | |
| CN106555360A (en) | A kind of manufacture method of cop tube paper | |
| CN104452467A (en) | Thin natural color food wrapping paper and preparation method thereof | |
| CN106954736B (en) | Method for producing composite microecological active biological feed for ruminant by using waste mushroom residue | |
| CN111574963A (en) | Degradable dust suppressant and preparation method thereof | |
| CN1610783A (en) | Process for producing degradable crops fibre environment protection packaging material and application | |
| CN1127276A (en) | Biological degraded plant fibre package material and producing method | |
| CN107647086A (en) | Method for producing microbial feed additive by adopting multi-strain mixed culture | |
| CN103013608A (en) | Method of preparing solid fuel by softening straws and curing and forming waste fungi bag base material | |
| CN107083719A (en) | A kind of environmentally friendly printing paper and preparation method thereof | |
| CN110001157B (en) | Fungus damage-prevention and anti-collision packaging material and production method thereof | |
| JPS5845918B2 (en) | Anaerobic digestion method for organic waste | |
| CN104562832A (en) | Production method of environment-friendly waterproof paper product |
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 |
Application publication date: 20210205 |
|
| RJ01 | Rejection of invention patent application after publication |