CN111662534B - Production method of high-strength luminous magnetic blackboard - Google Patents
Production method of high-strength luminous magnetic blackboard Download PDFInfo
- Publication number
- CN111662534B CN111662534B CN202010571524.1A CN202010571524A CN111662534B CN 111662534 B CN111662534 B CN 111662534B CN 202010571524 A CN202010571524 A CN 202010571524A CN 111662534 B CN111662534 B CN 111662534B
- Authority
- CN
- China
- Prior art keywords
- glue solution
- glue
- mixed
- plate
- blackboard
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/002—Panels; Plates; Sheets
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2275—Ferroso-ferric oxide (Fe3O4)
-
- 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)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a method for producing a high-strength blackboard with luminous magnetic attraction, which can effectively solve the problems of long service life, good effect and teaching quality guarantee of the blackboard, and comprises the following steps: 45-55% of engineering plastic, 10-12% of corundum, 2-4% of fluorescent powder, 0.5-1% of phosphorus powder, 2-3% of magnet powder, 3-5% of cotton fiber, 3-5% of cobalt soap, 2-3% of powdered ink and 18-25% of glue solution; cutting cotton fiber into fiber segments with length of 0.5-1cm, pulverizing the rest raw materials except for glue solution, sieving with 100-120 mesh sieve, and mixing to obtain fine powder; mixing the fiber section, the fine powder and the glue solution together, stirring uniformly to obtain mixed plate slurry, filling the mixed plate slurry into a plate making mold, pressing and shaping, airing until the water content is less than 2%, cutting and polishing to obtain a finished product. The invention has the advantages of rich raw materials, simple preparation method, easy production and preparation, good product quality, long service life, convenient use and good effect.
Description
Technical Field
The invention relates to teaching aids, in particular to a production method of a high-strength luminous magnetic blackboard.
Background
The blackboard is a teaching aid that teaching and student commonly used, the blackboard is mostly made by materials such as wooden for the current teaching, ground glass or iron porcelain, because the problem that exists of material itself, it is wear-resisting, life is short, because the blackboard is wear-resisting, in use still can produce pollutants such as dust, produce harmful effects to teachers and students 'healthy, and the blackboard easily produces the reflection of light or under the not enough condition of light, some students see not clearly the whole condition of writing on the blackboard, both influence the quality of teaching, bring harmful effects for student's eyesight again, therefore, improvement and innovation on the blackboard are imperative.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the invention aims to provide a method for producing a high-strength blackboard with luminous magnetic attraction, which can effectively solve the problems of long service life, good effect and guarantee of teaching quality of the blackboard.
The invention solves the technical scheme that a production method of a high-strength blackboard with luminous magnetic attraction comprises the following steps:
(1) And (3) preparing materials: the ingredients are calculated by the following weight percentage:
45-55% of engineering plastic, 10-12% of corundum, 2-4% of fluorescent powder, 0.5-1% of phosphorus powder, 2-3% of magnet powder, 3-5% of cotton fiber, 3-5% of cobalt soap, 2-3% of powdered ink and 18-25% of glue solution;
the engineering plastic is epoxy resin or polyamide;
the cobalt soap is fatty acid or cobalt naphthenate;
the glue solution comprises the following components in percentage by weight: 45-50% of phenolic resin, 45-50% of neoprene universal adhesive (a commercial product) and 5-8% of isocyanate, wherein the total amount is 100% of the total amount, the phenolic resin, the neoprene universal adhesive and the isocyanate are used as raw materials to prepare mixed adhesive, and the mixed adhesive is diluted by water to obtain adhesive liquid with the mass content of 25-35%;
(2) And (3) raw material treatment: cutting cotton fiber into fiber segments with length of 0.5-1cm, pulverizing the rest raw materials except for glue solution, sieving with 100-120 mesh sieve, and mixing to obtain fine powder;
(3) And preparing materials: mixing the fiber section, the fine powder and the glue solution together, stirring for 15-20 minutes by a stirrer, and uniformly mixing to obtain mixed board slurry;
(4) And die filling: loading the mixed plate slurry into plate-making mould, spreading, pressing at room temp. by using flat press3000-3500kg/cm 2 Pressing for 30-60 minutes under pressure, and shaping;
(5) And cooling: transferring the shaped plate to a flat plate airing rack, and airing at room temperature until the water content is less than 2% to form a solid plate body;
(6) And processing and polishing: the board body is processed and cut into the blackboard with the required size according to the specification, then a plane polishing machine is used for polishing the single surface of the board body, and the finished product is obtained after edge covering decoration.
The invention has the advantages of rich raw materials, simple preparation method, easy production and preparation, good product quality, long service life, convenient use and good effect, is a great innovation on blackboards, and has great economic and social benefits.
Detailed Description
The following examples are provided to explain the present invention in detail.
The invention, in its specific implementation, can be given by the following examples.
Example 1
The invention relates to a production method of a high-strength luminous magnetic blackboard, which comprises the following steps:
(1) And (3) preparing materials: the ingredients are calculated by the following weight percentage:
50% of engineering plastic, 11.5% of corundum, 3% of fluorescent powder, 0.5% of phosphorus powder, 2.5% of magnet powder, 4% of cotton fiber, 4% of cobalt soap, 2.5% of powdered ink and 22% of glue solution;
the glue solution comprises the following components in percentage by weight: preparing mixed glue by taking 47.5% of phenolic resin, 47.5% of neoprene universal glue and 5% of isocyanate as raw materials, wherein the total amount of the mixed glue is 100%, and diluting the mixed glue with water to obtain glue solution with the mass content of 30%;
(2) And (3) raw material treatment: cutting cotton fiber into fiber segments with length of 0.5-1cm, pulverizing the rest raw materials except for glue solution, sieving with 100-120 mesh sieve, and mixing to obtain fine powder;
(3) And preparing materials: mixing the fiber section, the fine powder and the glue solution together, stirring for 18 minutes by using a stirrer, and uniformly forming mixed board slurry;
(4) And die filling: loading the mixed plate slurry into plate-making mould, spreading, and leveling at room tempPlate press in 3200kg/cm 2 Pressing for 45 minutes under pressure, and shaping;
(5) And cooling: transferring the shaping plate to a flat plate airing rack, and airing at room temperature until the water content is less than 2% to form a solid plate body;
(6) And processing and polishing: the board body is processed and cut into the blackboard with the required size according to the specification, then a plane polishing machine is used for polishing the single surface of the board body, and the finished product is obtained after edge covering decoration.
Example 2
The invention relates to a production method of a high-strength blackboard with luminous magnetic attraction, which comprises the following steps:
(1) And (3) preparing materials: the ingredients are calculated by the following weight percentage:
47.5 percent of epoxy resin, 12.5 percent of corundum, 2.5 percent of fluorescent powder, 0.8 percent of phosphorus powder, 2.2 percent of magnet powder, 4.5 percent of cotton fiber, 3.3 percent of cobalt naphthenate, 2.7 percent of powdered ink and 24 percent of glue solution;
the glue solution comprises the following components in percentage by weight: preparing mixed glue by taking 47% of phenolic resin, 47% of neoprene universal glue and 6% of isocyanate as raw materials, wherein the total amount of the mixed glue is 100%, and diluting the mixed glue with water to obtain glue solution with the mass content of 26%;
(2) And (3) raw material treatment: cutting cotton fiber into fiber segments with length of 0.5-1cm, pulverizing the rest raw materials except for glue solution, sieving with 100-120 mesh sieve, and mixing to obtain fine powder;
(3) And preparing materials: mixing the fiber section, the fine powder and the glue solution together, stirring for 16 minutes by using a stirrer, and uniformly mixing to obtain mixed board slurry;
(4) And die filling: loading the mixed plate slurry into plate-making mold, spreading, pressing at room temperature with flat press at 3400kg/cm 2 Pressing for 40 minutes under pressure, and shaping;
(5) And cooling: transferring the shaped plate to a flat plate airing rack, and airing at room temperature until the water content is less than 2% to form a solid plate body;
(6) And processing and polishing: the board body is processed and cut into the blackboard with the required size according to the specification, then a plane polishing machine is used for polishing the single surface of the board body, and the finished product is obtained after edge covering decoration.
Example 3
The invention relates to a production method of a high-strength blackboard with luminous magnetic attraction, which comprises the following steps:
(1) And (3) preparing materials: the ingredients are calculated by the following weight percentage:
53 percent of polyamide, 10 percent of corundum, 3.5 percent of fluorescent powder, 1 percent of phosphor powder, 2.9 percent of magnet powder, 3.5 percent of cotton fiber, 4.8 percent of fatty acid, 2.3 percent of powdered ink and 19 percent of glue solution;
the glue solution comprises the following components in percentage by weight: preparing mixed glue by taking 46% of phenolic resin, 46% of neoprene universal glue and 8% of isocyanate as raw materials, wherein the total amount of the mixed glue is 100%, and diluting the mixed glue with water to obtain glue solution with the mass content of 33%;
(2) And (3) raw material treatment: cutting cotton fiber into fiber segments with length of 0.5-1cm, pulverizing the rest raw materials except for glue solution, sieving with 100-120 mesh sieve, and mixing to obtain fine powder;
(3) And preparing materials: mixing the fiber segment, the fine powder and the glue solution together, stirring for 19 minutes by using a stirrer, and uniformly mixing to obtain mixed board slurry;
(4) And die filling: loading the mixed plate slurry into plate-making mold, spreading, and pressing at room temperature with flat press at 3100kg/cm 2 Pressing for 55 minutes under pressure, and shaping;
(5) And cooling: transferring the shaped plate to a flat plate airing rack, and airing at room temperature until the water content is less than 2% to form a solid plate body;
(6) And processing and polishing: the board body is processed and cut into the blackboard with the required size according to the specification, then a plane polishing machine is used for polishing the single surface of the board body, and the finished product is obtained after edge covering decoration.
In the invention, the engineering plastic has strong plasticity resistance, good physical and mechanical properties, good glue solution performance and strong binding force, and the gold steel grit and the cotton fiber further enhance the firmness and the wear resistance, thereby effectively ensuring the use effect of the blackboard, having long service life, and ensuring the clear visibility of the blackboard surface due to the luminescent characteristics of the fluorescent powder and the phosphorus powder under the dark or light irradiation, and ensuring the writing effect due to the action of the powdered ink and no light reflection phenomenon; the magnetic powder is added to make the blackboard have magnetic attraction, when the display picture (paper) is required to be placed on the blackboard, the display picture (paper) can be directly pressed and attached to the blackboard by the magnetic block, the blackboard is very convenient, can be directly used for replacing a white board, and is a great innovation on the blackboard.
Through field application and test, the effect is very good, and the compressive strength of the board surface can reach 3000-3500kg/cm per square centimeter 2 No crack and crack, and shear strength up to 250kg/cm 2 The luminous area can reach more than 80 percent, the visibility is ensured, the sight dead angle is prevented, the blackboard can resist the temperature of minus 50 ℃ to 200 ℃ without deformation, and the service life can be prolonged by more than 5 times compared with the prior blackboard. The invention integrates multiple functions, has stable and reliable performance of raw materials and strong practicability of the production method, can be widely applied to teaching in high-temperature and low-temperature areas, saves the cost, improves the teaching quality and has huge economic and social benefits.
It should be noted that the core of the present invention lies in the raw material composition and the relevant process conditions, especially the raw material composition, and the above-mentioned examples are only for illustrating the specific embodiments of the present invention, but not for limiting the protection scope of the present invention, therefore, all the technical solutions that are substantially the same as or similar to the technical solutions of the present invention, which are made by adopting the composition principles and the process operations of the present invention, belong to the protection scope of the present invention.
Claims (3)
1. A production method of a high-strength blackboard with luminous magnetic attraction is characterized by comprising the following steps:
(1) And (3) preparing materials: the ingredients are calculated by the following weight percentage:
45-55% of engineering plastic, 10-12% of corundum, 2-4% of fluorescent powder, 0.5-1% of phosphorus powder, 2-3% of magnet powder, 3-5% of cotton fiber, 3-5% of cobalt soap, 2-3% of powdered ink and 18-25% of glue solution;
the engineering plastic is epoxy resin or polyamide;
the cobalt soap is cobalt naphthenate;
the glue solution comprises the following components in percentage by weight: 45-50% of phenolic resin, 45-50% of commercially available chloroprene non-benzene all-purpose adhesive and 5-8% of isocyanate, wherein the total amount is 100% and the raw materials are used as raw materials to prepare mixed adhesive, and the mixed adhesive is diluted by water to obtain adhesive liquid with the mass content of 25-35%;
(2) And (3) raw material treatment: cutting cotton fiber into fiber segments with length of 0.5-1cm, pulverizing the rest raw materials except for glue solution, sieving with 100-120 mesh sieve, and mixing to obtain fine powder;
(3) And preparing materials: mixing the fiber segment, the fine powder and the glue solution together, stirring for 15-20 minutes by using a stirrer, and uniformly forming mixed board slurry;
(4) And die filling: loading the mixed plate slurry into plate-making mold, spreading, and pressing at room temperature with flat press at 3000-3500kg/cm 2 Pressing for 30-60 minutes under pressure, and shaping;
(5) And cooling: transferring the shaping plate to a flat plate airing rack, and airing at room temperature until the water content is less than 2% to form a solid plate body;
(6) And processing and polishing: the plate body is processed and cut into the blackboard with required size according to the specification, then a plane polishing machine is used for polishing one side of the plate body, and edge covering decoration is carried out, thus obtaining the finished product.
2. The method for producing a high-strength blackboard with luminous magnetic attraction as claimed in claim 1, characterized by comprising the following steps:
(1) And (3) preparing materials: the ingredients are calculated by the following weight percentage:
50% of engineering plastic, 11.5% of corundum, 3% of fluorescent powder, 0.5% of phosphorus powder, 2.5% of magnet powder, 4% of cotton fiber, 4% of cobalt soap, 2.5% of powdered ink and 22% of glue solution;
the glue solution comprises the following components in percentage by weight: preparing mixed glue by using 47.5% of phenolic resin, 47.5% of chloroprene-free universal glue and 5% of isocyanate, wherein the total amount of the mixed glue is 100%, and diluting the mixed glue by using water to obtain a glue solution with the mass content of 30%;
(2) And (3) raw material treatment: cutting cotton fiber into fiber segments with length of 0.5-1cm, pulverizing the rest raw materials except for glue solution, sieving with 100-120 mesh sieve, and mixing to obtain fine powder;
(3) And preparing materials: mixing the fiber section, the fine powder and the glue solution together, stirring for 18 minutes by using a stirrer, and uniformly forming mixed board slurry;
(4) And die filling: loading the mixed plate slurry into plate-making mould, spreading and storingAt room temperature, the temperature was 3200kg/cm using a flat press 2 Pressing for 45 minutes under pressure, and shaping;
(5) And cooling: transferring the shaping plate to a flat plate airing rack, and airing at room temperature until the water content is less than 2% to form a solid plate body;
(6) And processing and polishing: the plate body is processed and cut into the blackboard with required size according to the specification, then a plane polishing machine is used for polishing one side of the plate body, and edge covering decoration is carried out, thus obtaining the finished product.
3. The method for producing a high-strength blackboard with luminous magnetic absorbability according to claim 1, characterized in that it includes the following steps:
(1) And (3) preparing materials: the ingredients are calculated by the following weight percentage:
47.5 percent of epoxy resin, 12.5 percent of corundum, 2.5 percent of fluorescent powder, 0.8 percent of phosphorus powder, 2.2 percent of magnet powder, 4.5 percent of cotton fiber, 3.3 percent of cobalt naphthenate, 2.7 percent of powdered ink and 24 percent of glue solution;
the glue solution comprises the following components in percentage by weight: preparing mixed glue by taking 47% of phenolic resin, 47% of chloroprene-free universal glue and 6% of isocyanate as raw materials, wherein the total amount of the mixed glue is 100%, and diluting the mixed glue with water to obtain glue liquid with the mass content of 26%;
(2) And (3) raw material treatment: cutting cotton fiber into fiber segments with length of 0.5-1cm, pulverizing the rest raw materials except for glue solution, sieving with 100-120 mesh sieve, and mixing to obtain fine powder;
(3) And preparing materials: mixing the fiber section, the fine powder and the glue solution together, stirring for 16 minutes by using a stirrer, and uniformly mixing to obtain mixed board slurry;
(4) And die filling: loading the mixed plate slurry into plate-making mold, spreading, and pressing at room temperature with plate press at 3400kg/cm 2 Pressing for 40 minutes under pressure, and shaping;
(5) And cooling: transferring the shaping plate to a flat plate airing rack, and airing at room temperature until the water content is less than 2% to form a solid plate body;
(6) And processing and polishing: the board body is processed and cut into the blackboard with the required size according to the specification, then a plane polishing machine is used for polishing the single surface of the board body, and the finished product is obtained after edge covering decoration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571524.1A CN111662534B (en) | 2020-06-22 | 2020-06-22 | Production method of high-strength luminous magnetic blackboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571524.1A CN111662534B (en) | 2020-06-22 | 2020-06-22 | Production method of high-strength luminous magnetic blackboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111662534A CN111662534A (en) | 2020-09-15 |
| CN111662534B true CN111662534B (en) | 2023-01-24 |
Family
ID=72389075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010571524.1A Active CN111662534B (en) | 2020-06-22 | 2020-06-22 | Production method of high-strength luminous magnetic blackboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111662534B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186735A (en) * | 2007-12-14 | 2008-05-28 | 李泉堂 | Blackboard panel and producing method thereof |
| JP2010111073A (en) * | 2008-11-07 | 2010-05-20 | Hitachi Advanced Syst:Kk | Display panel built-in type electronic blackboard |
| CN104589857A (en) * | 2014-11-30 | 2015-05-06 | 陈伟群 | Folding blackboard |
| CN108274928A (en) * | 2018-03-20 | 2018-07-13 | 福州外语外贸学院 | A kind of open air blackboard |
-
2020
- 2020-06-22 CN CN202010571524.1A patent/CN111662534B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101186735A (en) * | 2007-12-14 | 2008-05-28 | 李泉堂 | Blackboard panel and producing method thereof |
| JP2010111073A (en) * | 2008-11-07 | 2010-05-20 | Hitachi Advanced Syst:Kk | Display panel built-in type electronic blackboard |
| CN104589857A (en) * | 2014-11-30 | 2015-05-06 | 陈伟群 | Folding blackboard |
| CN108274928A (en) * | 2018-03-20 | 2018-07-13 | 福州外语外贸学院 | A kind of open air blackboard |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111662534A (en) | 2020-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102363287B (en) | Resin grinding wheel and manufacturing method thereof | |
| CN102713334B (en) | Friction material for brakes | |
| US20200102247A1 (en) | Multilayer artificial stone and preparation method thereof | |
| CN104669131A (en) | Calcium sulfate whisker reinforced resin grinding wheel and preparation method thereof | |
| CN102179775B (en) | Resin abrasive tool for hard alloy and method for preparing resin abrasive | |
| CN102114615B (en) | Rare earth polishing disc | |
| CN111662534B (en) | Production method of high-strength luminous magnetic blackboard | |
| CN107868376A (en) | A kind of wear-resisting acrylic board and its processing method | |
| CN107234553B (en) | A kind of elastic grinding disk and preparation method thereof | |
| WO2021012308A1 (en) | Organic fiber toughened inorganic composite artificial stone panel and preparation method therefor | |
| CN105500468A (en) | Bamboo plastic plywood and processing technology thereof | |
| CN104772693B (en) | It is a kind of to be used to process diamond lap pad of ultra hard ceramic and preparation method thereof | |
| CN111571799A (en) | Method for manufacturing inorganic pattern artificial stone | |
| CN107572965B (en) | Fireproof plate and preparation method thereof | |
| CN107513249A (en) | A kind of macromolecule selfreparing elastic mechanical material and preparation method thereof | |
| CN106607770B (en) | A kind of preparation method of microcrystal fused alumina Ceramic mill disc | |
| US1498270A (en) | Adhesive material | |
| CN107602950A (en) | Foxing strip for rubber shoes adhesion promoting layer rubber and preparation method thereof | |
| US1866287A (en) | Friction elements and method of making | |
| CN112225532A (en) | Honeycomb board applied to house decoration and rock board combined use and production process thereof | |
| CN106047235B (en) | A kind of quartz repair sheets and preparation method thereof | |
| CN111941719A (en) | Production process of printed PVC signboard | |
| CN112296893A (en) | Resin grinding wheel for automatic cutting and preparation method thereof | |
| CN1050030A (en) | Technology of production of magnetic rubber | |
| CN115594457B (en) | Industrial tailing inorganic artificial stone with toughness and artistry 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |