CN111844821A - Preparation method and device of acrylic sheet - Google Patents
Preparation method and device of acrylic sheet Download PDFInfo
- Publication number
- CN111844821A CN111844821A CN202010618124.1A CN202010618124A CN111844821A CN 111844821 A CN111844821 A CN 111844821A CN 202010618124 A CN202010618124 A CN 202010618124A CN 111844821 A CN111844821 A CN 111844821A
- Authority
- CN
- China
- Prior art keywords
- acrylic sheet
- melt
- roller
- cooling
- cured product
- 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
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000155 melt Substances 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000005520 cutting process Methods 0.000 claims abstract description 25
- 239000002904 solvent Substances 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000001125 extrusion Methods 0.000 claims abstract description 20
- 238000007373 indentation Methods 0.000 claims abstract description 20
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 20
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 20
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 11
- 239000003431 cross linking reagent Substances 0.000 claims description 8
- DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 claims description 5
- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 claims description 5
- 238000000465 moulding Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- B29D7/00—Producing flat articles, e.g. films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
- B29K2033/04—Polymers of esters
- B29K2033/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
Abstract
The invention discloses a preparation method and a device of an acrylic sheet, which comprises the following steps: mixing polymethyl methacrylate general-purpose extrusion resin with a solvent to obtain a mixed material; heating the mixed material to obtain a melt; performing indentation cooling on the melt to obtain a solidified substance; and cutting the cured product to obtain the acrylic sheet. The invention also provides a preparation method and a device of the acrylic sheet, which can well simplify the process steps for preparing the acrylic sheet.
Description
Technical Field
The invention relates to the field of acrylic sheet production, in particular to a preparation method and a device of an acrylic sheet.
Background
With the gradual improvement of living standard of people, various decorative materials appear in places such as public places, luxury hotels, shopping malls and the like; the acrylic sheet is popular among people because of the advantages of light weight, low price, easy forming and the like; however, the production process of the existing acrylic sheet is relatively complex, so that the production efficiency of the acrylic sheet is not high.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a preparation method of the acrylic sheet, which can well simplify the process steps for preparing the acrylic sheet.
The invention also provides an acrylic sheet preparation device applying the preparation method.
The preparation method of the acrylic sheet according to the embodiment of the first aspect of the invention comprises the following steps:
mixing polymethyl methacrylate general-purpose extrusion resin with a solvent to obtain a mixed material;
heating the mixed material to obtain a melt;
performing indentation cooling on the melt to obtain a solidified substance;
and cutting the cured product to obtain the acrylic sheet.
The method for preparing the acrylic sheet according to the embodiment of the first aspect of the invention has at least the following beneficial effects: when the acrylic sheet is prepared, firstly, mixing polymethyl methacrylate general-purpose extrusion resin with a solvent to obtain a mixed material; then, heating the mixed material to obtain a melt; then, performing indentation molding on the melt and cooling the melt to obtain a cured substance; and then cutting the cured product into acrylic plates with the same shape and size, so that the preparation steps of the acrylic plates are simplified, and the production efficiency of the acrylic plates is improved.
According to some embodiments of the present invention, the amount of the polymethylmethacrylate general-purpose extrusion resin is 96 parts by weight and the amount of the solvent is 4 parts by weight.
According to some embodiments of the invention, the solvent is a cross-linking agent.
According to some embodiments of the invention, the cross-linking agent comprises ethylene glycol dimethacrylate.
According to some embodiments of the invention, heating the mixture to obtain a melt comprises: the mixture was heated to 230 degrees celsius to obtain a melt.
According to some embodiments of the invention, said subjecting said melt to indentation cooling results in a solidified object comprising:
extruding the melt with a discharge die to a roller;
and (4) performing indentation cooling on the melt by using the roller to obtain a cured product.
According to some embodiments of the invention, the inside of the roller is provided with a cooling circuit for cooling down the roller.
According to some embodiments of the invention, the cutting the cured product to obtain an acrylic sheet comprises: and cutting the cured product by using a cutting tool to obtain the acrylic sheet.
According to the acrylic sheet manufacturing apparatus of the embodiment of the second aspect of the present invention, the acrylic sheet manufacturing method of the first aspect of the present invention is applied. Inferior gram force panel preparation facilities includes:
The mixing component is used for mixing the polymethyl methacrylate general-purpose extrusion resin with a solvent to obtain a mixed material; a heating part for heating the mixture to obtain a melt;
a roller for performing indentation cooling on the melt to obtain a solidified substance;
and the cutting component is used for cutting the cured product to obtain the acrylic sheet.
According to the preparation device of the acrylic sheet, the preparation device at least has the following beneficial effects: when the acrylic sheet is prepared, firstly, a mixing part mixes the polymethyl methacrylate general-purpose extrusion resin and a solvent to obtain a mixed material; heating the mixed material by the heating part to obtain melt; the roller is used for performing indentation molding on the melt and cooling the melt to obtain a cured substance; the cutting component cuts the cured product into acrylic plates with the same shape and size, so that the preparation steps of the acrylic plates are simplified, and the production efficiency of the acrylic plates is improved.
According to some embodiments of the invention, the inside of the roller is provided with a cooling circuit for cooling down the roller.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flowchart illustrating a method for manufacturing acrylic sheets according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating the steps of the indentation cooling in the acrylic sheet manufacturing method according to the first embodiment of the present invention;
fig. 3 is a schematic structural diagram of an acrylic sheet manufacturing apparatus according to a second embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions.
Example one
Referring to fig. 1, a method for manufacturing an acrylic sheet according to a first embodiment of the present invention includes, but is not limited to, the following steps:
and S100, mixing the polymethyl methacrylate general-purpose extrusion resin with a solvent to obtain a mixed material.
In this embodiment, the general-purpose polymethyl methacrylate extrusion resin and the solvent are mixed in this step to obtain a mixed material; the polymethyl methacrylate general-purpose extrusion resin and the solvent are used as preparation materials of the acrylic sheet, and the two are mixed to prepare the acrylic sheet on the premise of preparation of the acrylic sheet.
And step S200, heating the mixed material to obtain melt.
In this example, the mixture obtained in the above step was subjected to heat treatment, so that the polymethyl methacrylate general-purpose extrusion resin was melted, and the polymethyl methacrylate general-purpose extrusion resin and the solvent were chemically reacted to become a melt.
And step S300, performing indentation cooling on the melt to obtain a solidified substance.
In this example, the melt after the chemical reaction is indented to shape and solidify the melt, and during the solidification, the melt is cooled to obtain a solidified material.
And S400, cutting the cured product to obtain the acrylic sheet.
In this example, the cured product obtained in the above-described manner was cut in this step to obtain acrylic sheets having a uniform size.
In this example, the amount of the polymethyl methacrylate general-purpose extrusion resin was 96 parts by weight, and the amount of the solvent was 4 parts by weight. The polymethyl methacrylate general-purpose extrusion resin was set to 96 parts by weight and the solvent was set to 4 parts by weight, so that the properties of the produced acrylic sheet were more excellent.
In this embodiment, the solvent is a crosslinking agent. Wherein the crosslinking agent comprises ethylene glycol dimethacrylate. The solvent is a cross-linking agent, the cross-linking agent comprises ethylene glycol dimethacrylate, the ethylene glycol dimethacrylate and the polymethyl methacrylate general-purpose extrusion resin can perform chemical reaction to generate the acrylic sheet, and the generated acrylic sheet has better performance.
In this embodiment, the heating the mixture to obtain a melt includes: the mixture was heated to 230 degrees celsius to give a melt. In the process of heating the mixed material, the heating temperature is up to 230 ℃, so that the substances in the mixed material can react more thoroughly.
Referring to fig. 2, in step S300, the indentation cooling of the melt to obtain a solidified object includes, but is not limited to, the following steps:
step S310, extruding the melt to a roller by using a discharge die.
In this example, the melt subjected to the reaction treatment in this step is discharged through a discharge die so that the melt reaches the peripheral surface of the roller in preparation for the subsequent molding and curing treatment.
And step S320, performing indentation cooling on the melt by using the roller to obtain a cured product.
In this embodiment, the step uses a roller to perform indentation formation on the melt, and a cooling circuit is disposed inside the roller, so that the melt can be cooled during indentation by the roller, and finally a cured product is obtained.
In this embodiment, a cooling circuit for cooling the roller is disposed inside the roller. The roller is provided with a cooling circuit, so that cold water enters the roller, and the melt is transferred to the roller by hot water, so that the melt is cooled and solidified.
In this embodiment, the cutting the cured product to obtain an acrylic sheet includes: and cutting the cured product by using a cutting tool to obtain the acrylic sheet. And cutting the cured product by using a cutting tool to obtain the acrylic sheet.
According to the technical scheme, when the acrylic sheet is prepared, the polymethyl methacrylate general-purpose extrusion resin and the solvent are mixed to obtain a mixed material; then, heating the mixed material to obtain a melt; then, performing indentation molding on the melt and cooling the melt to obtain a cured substance; and then cutting the cured product into acrylic plates with the same shape and size, so that the preparation steps of the acrylic plates are simplified, and the production efficiency of the acrylic plates is improved.
Example two
Referring to fig. 3, a second embodiment of the present invention provides an acrylic sheet manufacturing apparatus, to which the first embodiment of the present invention is applied. The acrylic sheet manufacturing apparatus 1000 includes, but is not limited to, the following components:
a mixing part 1100 for mixing the polymethyl methacrylate general-purpose extrusion resin with a solvent to obtain a mixed material;
A heating unit 1200 for heating the mixture to obtain a melt;
a roller 1300 for performing indentation cooling on the melt to obtain a cured product;
and the cutting component 1400 is used for cutting the cured product to obtain the acrylic sheet.
Wherein, the inside of running roller 1300 is provided with the cooling circuit that is used for making running roller 1300 cool down. The roller 1300 is provided with a cooling circuit, so that cold water enters the roller and the heat of the melt transferred to the roller 1300 by the hot water is transferred, thereby achieving the effect of cooling and solidifying the melt.
It should be noted that, since the acrylic sheet manufacturing apparatus in the present embodiment is based on the same inventive concept as the acrylic sheet manufacturing method in the first embodiment, the corresponding content in the first method embodiment is also applicable to the present apparatus embodiment, and is not described in detail herein.
According to the scheme, when the acrylic sheet is prepared, firstly, the mixing part 1100 mixes the polymethyl methacrylate general-purpose extrusion resin and the solvent to obtain a mixed material; the heating part 1200 then heats the mixture to obtain a melt; the roller 1300 then performs indentation molding on the melt and performs cooling treatment on the melt to obtain a cured product; the cutting part 1400 cuts the cured product into acrylic boards with the same shape and size, so that the preparation steps of the acrylic boards are simplified, and the production efficiency of the acrylic boards is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A preparation method of an acrylic sheet is characterized by comprising the following steps:
mixing polymethyl methacrylate general-purpose extrusion resin with a solvent to obtain a mixed material;
heating the mixed material to obtain a melt;
Performing indentation cooling on the melt to obtain a solidified substance;
and cutting the cured product to obtain the acrylic sheet.
2. The method for preparing an acrylic sheet according to claim 1, wherein: the amount of the polymethyl methacrylate general-purpose extrusion resin was 96 parts by weight, and the amount of the solvent was 4 parts by weight.
3. The method for preparing an acrylic sheet according to claim 1, wherein: the solvent is a cross-linking agent.
4. The method for preparing an acrylic sheet according to claim 3, wherein: the crosslinking agent comprises ethylene glycol dimethacrylate.
5. The method as claimed in claim 1, wherein the step of heating the mixture to obtain a melt comprises:
the mixture was heated to 230 degrees celsius to obtain a melt.
6. The method for manufacturing acrylic sheet according to claim 1, wherein said subjecting said melt to indentation cooling to obtain a cured product comprises:
extruding the melt with a discharge die to a roller;
and (4) performing indentation cooling on the melt by using the roller to obtain a cured product.
7. The method for preparing an acrylic sheet according to claim 6, wherein: and a cooling loop used for cooling the roller is arranged in the roller.
8. The method for preparing acrylic sheet according to claim 1, wherein the cutting of the cured product to obtain acrylic sheet comprises:
and cutting the cured product by using a cutting tool to obtain the acrylic sheet.
9. The utility model provides an inferior gram force panel preparation facilities which characterized in that includes:
the mixing component is used for mixing the polymethyl methacrylate general-purpose extrusion resin with a solvent to obtain a mixed material;
a heating part for heating the mixture to obtain a melt;
a roller for performing indentation cooling on the melt to obtain a solidified substance;
and the cutting component is used for cutting the cured product to obtain the acrylic sheet.
10. The acrylic sheet manufacturing apparatus according to claim 9, wherein: and a cooling loop used for cooling the roller is arranged in the roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618124.1A CN111844821A (en) | 2020-06-30 | 2020-06-30 | Preparation method and device of acrylic sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618124.1A CN111844821A (en) | 2020-06-30 | 2020-06-30 | Preparation method and device of acrylic sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111844821A true CN111844821A (en) | 2020-10-30 |
Family
ID=72989477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010618124.1A Pending CN111844821A (en) | 2020-06-30 | 2020-06-30 | Preparation method and device of acrylic sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111844821A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58101019A (en) * | 1981-12-11 | 1983-06-16 | Shin Kobe Electric Mach Co Ltd | Manufacture of synthetic resin sheet with transparent part |
| CN101013614A (en) * | 2007-01-12 | 2007-08-08 | 刘津平 | Transparent conducting Composite material, film, board and method of manufacturing the same |
| CN107674357A (en) * | 2017-10-17 | 2018-02-09 | 王新 | Acrylic quartz stone slab and preparation method thereof |
| CN109485780A (en) * | 2018-10-12 | 2019-03-19 | 张金娥 | Acryl plates and its preparation process |
| CN109486012A (en) * | 2018-11-26 | 2019-03-19 | 绍兴臣工新材料科技有限公司 | A kind of building decoration light weight board and preparation method thereof |
-
2020
- 2020-06-30 CN CN202010618124.1A patent/CN111844821A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58101019A (en) * | 1981-12-11 | 1983-06-16 | Shin Kobe Electric Mach Co Ltd | Manufacture of synthetic resin sheet with transparent part |
| CN101013614A (en) * | 2007-01-12 | 2007-08-08 | 刘津平 | Transparent conducting Composite material, film, board and method of manufacturing the same |
| CN107674357A (en) * | 2017-10-17 | 2018-02-09 | 王新 | Acrylic quartz stone slab and preparation method thereof |
| CN109485780A (en) * | 2018-10-12 | 2019-03-19 | 张金娥 | Acryl plates and its preparation process |
| CN109486012A (en) * | 2018-11-26 | 2019-03-19 | 绍兴臣工新材料科技有限公司 | A kind of building decoration light weight board and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 司航: "《有机化工原料 检索工具 第2版》", 31 January 1995, 化学工业出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102140246A (en) | Method for preparing nylon powder for selective laser sintering | |
| CN105778484B (en) | The modified nylon materials and its Method of printing of a kind of 3D printing applied to FDM technology | |
| CN107216155B (en) | PF/PVA double-coated ceramic powder for laser 3D printing/cold isostatic pressing composite molding and preparation method thereof | |
| CN100452248C (en) | Non-mold release agent composite insulator core rod | |
| CN105504565A (en) | Graphene-containing conducting material used for 3D printing and preparation method of graphene-containing conducting material | |
| CN106696252A (en) | Manufacturing method for high polymer material three-dimensional product | |
| CN101486894B (en) | Shape-stabilized phase change material and preparation thereof | |
| CN105111655B (en) | A kind of light guide plate fabrication processing system | |
| CN111844821A (en) | Preparation method and device of acrylic sheet | |
| CN100415820C (en) | Process for preparing teflon expanded sealing plate used for space air vehicles | |
| CN106977875A (en) | A kind of low-temperature catalyzed solidification aldol resin system and preparation method thereof | |
| CN104497343A (en) | Preparation method of polymethacrylimide micro-foaming material and product thereof | |
| CN1858115B (en) | Process for producing hot-press high frequency foam cotton | |
| CN116285338B (en) | Composite magnetic plastic and preparation method thereof | |
| TWI703096B (en) | Treatment method for reuse of waste silica mud | |
| CN108117635A (en) | A kind of compound cellular material of epoxy resin and preparation method thereof | |
| CN217144637U (en) | Uniform foaming forming device for high polymer foam | |
| CN108410129A (en) | Composition of sole mold and manufacturing method thereof | |
| CN103289316B (en) | The preparation method and Super-material antenna of a kind of metamaterial substrate | |
| CN108424601A (en) | The water-solubility PVA of composite fibre melt-processable is sliced and its preparation process | |
| CN103112071A (en) | Automobile interior part and manufacturing method thereof | |
| CN102744897B (en) | Production process for nanometer reinforced PET slabs with high transparency and high weatherability | |
| CN107540810A (en) | A kind of preparation method of bamboo powder foamed plastics | |
| CN114957974A (en) | Engineering plastic material based on modified nylon material and preparation method thereof | |
| CN101177031B (en) | Plastic forming method and device 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 |
Application publication date: 20201030 |
|
| RJ01 | Rejection of invention patent application after publication |