CN113846513A - Graphene paper basin formula and production process - Google Patents
Graphene paper basin formula and production process Download PDFInfo
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- CN113846513A CN113846513A CN202111119833.6A CN202111119833A CN113846513A CN 113846513 A CN113846513 A CN 113846513A CN 202111119833 A CN202111119833 A CN 202111119833A CN 113846513 A CN113846513 A CN 113846513A
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- pulp board
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/14—Carboxylic acids; Derivatives thereof
- D21H17/15—Polycarboxylic acids, e.g. maleic acid
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/35—Polyalkenes, e.g. polystyrene
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/66—Salts, e.g. alums
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/28—Colorants ; Pigments or opacifying agents
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
The invention relates to the technical field of electroacoustic sound, and discloses a graphene cone formula and a production process, wherein the graphene cone formula comprises the following raw materials in parts by weight: 30-40% of pulp board (EKB), 50-58% of pulp board (northern wood), 2-5% of kapok fiber, 8-12% of direct black and red light 3BG dye, 8-10% of aluminum sulfate, 8-12% of industrial salt, 0.2-1% of graphene, 40-50% of polypropylene raw material, 1-1.5% of lubricant, 4.5-3% of maleic anhydride and 1-0.5% of white oil. According to the graphene cone formula and the production process, graphene is added in the process of manufacturing the loudspeaker cone, and graphite paper consisting of graphene sheets has a plurality of holes, so that the graphite paper is very brittle, however, functionalized graphene is obtained through oxidation, the graphite paper made of the functionalized graphene is extremely firm and tough, the graphene has good toughness and strength, and the added graphene can integrally improve the rigidity of the cone without increasing the weight, and has the purposes of obviously improving low, medium and high frequency tone quality, increasing power and improving sound pressure.
Description
Technical Field
The invention relates to the technical field of electroacoustic sound, in particular to a graphene cone formula and a production process.
Background
The cone is an important core material of the loudspeaker, has irreplaceable positions, and is a satisfactory loudspeaker, and the key point of the design is that the cone is the soul of the whole loudspeaker; the frequency response characteristic of the loudspeaker depends on the performance of the cone, which in turn depends on the material, geometry and processing technology of the cone; the following requirements are often placed on the cone material in the production of cones: 1. the material density is low, the mass is small, the high-frequency characteristic of the loudspeaker is excellent, and the transient characteristic is good; 2. the Young modulus E of the material is large, the rigidity is high, the high-frequency replay frequency can be improved, the cone is light in weight and good in rigidity, and the output sound pressure is high; the rigidity of the cone is improved, the segmentation vibration and the phase distortion of the unit can be reduced, and the frequency response range of the unit is improved; 3. has proper internal resistance, and can inhibit the dividing vibration of the cone.
The loudspeaker is various in types and greatly different in price, audio electric energy enables a cone or a diaphragm to vibrate and resonate (resonate) with surrounding air through electromagnetic, piezoelectric or electrostatic effects to generate sound, the sound transmission definition of the loudspeaker is influenced by cone materials, the cone in the prior art generally has the common defects of small Young modulus, insufficient rigidity, insufficient sound definition and the like, in order to solve the problem of insufficient rigidity, the common method is to add materials such as glass fibers, carbon fibers and the like, but the materials such as the glass fibers, the carbon fibers and the like have certain weight and can lose certain sound pressure level, and therefore the formula and the production process of the graphene cone are provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a graphene cone formula and a production process, which have the advantages of enhancing the rigidity of the cone without increasing the weight and enhancing the sound definition and the like, and solve the problem that in order to solve the problem of insufficient rigidity, glass fibers, carbon fiber and other materials are added in a common way, but the glass fibers, the carbon fiber and other materials have certain weight and can lose certain sound pressure level.
(II) technical scheme
In order to achieve the purposes of enhancing the rigidity of the cone without increasing weight and enhancing sound definition, the invention provides the following technical scheme: the graphene cone formula comprises the following raw materials in parts by weight: 30-40% of pulp board (EKB), 50-58% of pulp board (northern wood), 2-5% of kapok fiber, 8-12% of direct black and red light 3BG dye, 8-10% of aluminum sulfate, 8-12% of industrial salt, 0.2-1% of graphene, 40-50% of polypropylene raw material, 1-1.5% of lubricant, 4.5-3% of maleic anhydride and 1-0.5% of white oil.
Preferably, the water content of the pulp board (EKB) is 12%, the water content of the pulp board (northern wood) is 12%, the water content of kapok fiber is 12%, the water content of direct black-and-red 3BG dye is 0.00%, the water content of aluminum sulfate is 0.00%, and the water content of industrial salt is 0.00%.
Preferably, the pulp board (EKB) and the pulp board (North wood) are both natural-color sulfate softwood pulp or wood boards made of bleached sulfate softwood pulp, and the industrial salt is a mixture of sodium chloride and sodium nitrite.
Preferably, the graphene is a single-layer carbon atom formed by infiltrating carbon atoms into ruthenium at 1150 ℃ and cooling to 850 ℃, and the graphene may be one of single-layer graphene, few-layer graphene, double graphene or multi-layer graphene.
Preferably, the maleic anhydride is stored in a sealed box, is opened before use to prevent leakage, and has a maximum allowable concentration of 1.0mg/L and a maximum allowable concentration of 0.2mg/m3The storage process is carried out in a cool, dry and well ventilated storehouse.
A graphene cone production process comprises the following steps:
1) taking the pulp board (EKB) and the pulp board (North wood) in parts by mass, adding the EKB and the pulp board into a pulping machine, adding water according to the proportion of (1: 3), and pulping;
2) pulling out the slurry polished in the first step, wherein the water content of the slurry is controlled to be 12-20%, and adding the kapok fiber, the direct black-red light 3BG dye, the aluminum sulfate, the industrial salt, the graphene, the polypropylene raw material, the lubricant, the maleic anhydride and the white oil in parts by weight into the slurry for fully mixing;
3) pouring the fully mixed raw materials in the step two into a loudspeaker cone mould respectively, and performing film pressing forming on the loudspeaker cone mould;
4) baking and solidifying the semi-finished product formed by pressing the film, and polishing the surface of the product after cooling to obtain a loudspeaker cone;
5) and (4) taking the finished loudspeaker cone finished in the step four, and mounting the finished loudspeaker cone on a loudspeaker to detect the product quality.
(III) advantageous effects
Compared with the prior art, the invention provides a graphene cone formula and a production process, and the graphene cone formula has the following beneficial effects:
1. according to the graphene cone paper formula and the production process, graphene is added in the loudspeaker cone paper manufacturing process, the graphene is one of materials with the highest known strength, and has good toughness and can be bent, the theoretical Young modulus of the graphene reaches 1.0TPa, the inherent tensile strength is 130GP, the reduced graphene modified by hydrogen plasma also has good strength, the average modulus can be 0.25TPa, and the graphite paper formed by graphene sheets has a plurality of holes, so that the graphite paper is very brittle, however, the functionalized graphene is obtained through oxidation, the graphite paper made of the functionalized graphene is extremely firm and tough, the graphene has good toughness and good strength, and the addition of the graphene into the loudspeaker cone paper production process can integrally improve the rigidity of the cone paper without increasing the weight, so that the low, medium and high frequency sound quality is obviously improved, The power and sound pressure are increased.
2. This graphite alkene cone formula and production technology, through increase graphite alkene in the formula, reduce polypropylene proportion, in the in-process of carrying out speaker cone manufacturing, the application of polypropylene has been reduced, replace its vacant part for graphite alkene, because the good mechanical strength of graphite alkene, the thickness of reducible cone, make it possible to be thinner, the rigidity is better, thereby reach the requirement of speaker sound basin ideal material, kapok fibre is as a natural cellulose fibre, have big hollow unique structure of thin wall, wherein the void fraction is higher than other current fibre far away, be good thermal-insulated, give sound insulation, cold-proof and buoyancy material, it can effectual the noise of absorbing the speaker, improve the definition and the quality of speaker sound.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 first embodiment is as follows: the graphene cone formula comprises the following raw materials in parts by weight: 30% of pulp board (EKB), 50% of pulp board (northern wood), 5% of kapok fiber, 8% of direct black and red light 3BG dye, 8% of aluminum sulfate, 8% of industrial salt, 0.2% of graphene, 40% of polypropylene raw material, 1.5% of lubricant, 4.5% of maleic anhydride, 1% of white oil, 12% of water content of pulp board (EKB), 12% of water content of pulp board (northern wood), 12% of water content of kapok fiber, 0.00% of water content of direct black and red light 3BG dye, 0.00% of water content of aluminum sulfate and 0.00% of water content of industrial salt.
A graphene cone production process comprises the following steps:
1) taking the pulp board (EKB) and the pulp board (North wood) in parts by mass, adding the EKB and the pulp board into a pulping machine, adding water according to the proportion of (1: 3), and pulping;
2) pulling out the slurry polished in the first step, wherein the water content of the slurry is controlled to be 12-20%, and adding the kapok fiber, the direct black-red light 3BG dye, the aluminum sulfate, the industrial salt, the graphene, the polypropylene raw material, the lubricant, the maleic anhydride and the white oil in parts by weight into the slurry for fully mixing;
3) pouring the fully mixed raw materials in the step two into a loudspeaker cone mould respectively, and performing film pressing forming on the loudspeaker cone mould;
4) baking and solidifying the semi-finished product formed by pressing the film, and polishing the surface of the product after cooling to obtain a loudspeaker cone;
5) and (4) taking the finished loudspeaker cone finished in the step four, and mounting the finished loudspeaker cone on a loudspeaker to detect the product quality.
Example two: the graphene cone formula comprises the following raw materials in parts by weight: 40% of pulp board (EKB), 58% of pulp board (northern wood), 2% of kapok fiber, 12% of direct black and red light 3BG dye, 10% of aluminum sulfate, 12% of industrial salt, 1% of graphene, 50% of polypropylene raw material, 1% of lubricant, 3% of maleic anhydride, 0.5% of white oil, 12% of water content of pulp board (EKB), 12% of water content of pulp board (northern wood), 12% of water content of kapok fiber, 0.00% of water content of direct black and red light 3BG dye, 0.00% of water content of aluminum sulfate and 0.00% of water content of industrial salt.
A graphene cone production process comprises the following steps:
1) taking the pulp board (EKB) and the pulp board (North wood) in parts by mass, adding the EKB and the pulp board into a pulping machine, adding water according to the proportion of (1: 3), and pulping;
2) pulling out the slurry polished in the first step, wherein the water content of the slurry is controlled to be 12-20%, and adding the kapok fiber, the direct black-red light 3BG dye, the aluminum sulfate, the industrial salt, the graphene, the polypropylene raw material, the lubricant, the maleic anhydride and the white oil in parts by weight into the slurry for fully mixing;
3) pouring the fully mixed raw materials in the step two into a loudspeaker cone mould respectively, and performing film pressing forming on the loudspeaker cone mould;
4) baking and solidifying the semi-finished product formed by pressing the film, and polishing the surface of the product after cooling to obtain a loudspeaker cone;
5) and (4) taking the finished loudspeaker cone finished in the step four, and mounting the finished loudspeaker cone on a loudspeaker to detect the product quality.
In the above embodiment:
the kapok fiber is a fruit fiber of several plants in kapok family of malvales, is the finest, lightest, highest hollow degree and warmest fiber material, has the characteristics of mould resistance, softness, water impermeability, heat non-conduction, warmth retention, strong hygroscopicity and the like, is widely applied to various home textile products, and can increase the sound absorption effect of the loudspeaker cone.
After the aluminum sulfate is dissolved in the water, the fine particles and the natural colloidal particles in the water can be coagulated into massive floccules, so that the slurry can be quickly fused.
Graphene is a new material with sp hybridized and connected carbon atoms tightly packed into a single-layer two-dimensional honeycomb lattice structure, and has excellent optical, electrical and mechanical properties, has important application prospect in the aspects of materials science, micro-nano processing, energy, biomedicine, drug delivery and the like, is considered as a future revolutionary material, graphene is one of the materials with the highest known strength, meanwhile, the graphene has good toughness and can be bent, the theoretical Young modulus of the graphene reaches 1.0TPa, the inherent tensile strength is 130GPa, the reduced graphene modified by the hydrogen plasma also has very good strength, the average modulus can be larger than 0.25TPa, the graphite paper consisting of the graphene sheets has a plurality of holes, therefore, the graphite paper is very brittle, however, the functionalized graphene obtained by oxidation is extremely strong and tough when the graphite paper is made of the functionalized graphene.
The polypropylene is colorless, odorless, nontoxic and semitransparent solid matter, is thermoplastic synthetic resin with excellent performance, is colorless and semitransparent thermoplastic light general plastic, and has chemical resistance, heat resistance, electric insulation, high-strength mechanical property, good high-wear-resistance processing performance and the like.
The invention has the beneficial effects that: according to the graphene cone paper formula and the production process, graphene is added in the loudspeaker cone paper manufacturing process, the graphene is one of materials with the highest known strength, and has good toughness and can be bent, the theoretical Young modulus of the graphene reaches 1.0TPa, the inherent tensile strength is 130GP, the reduced graphene modified by hydrogen plasma also has good strength, the average modulus can be 0.25TPa, and the graphite paper formed by graphene sheets has a plurality of holes, so that the graphite paper is very brittle, however, the functionalized graphene is obtained through oxidation, the graphite paper made of the functionalized graphene is extremely firm and tough, the graphene has good toughness and good strength, and the addition of the graphene into the loudspeaker cone paper production process can integrally improve the rigidity of the cone paper without increasing the weight, so that the low, medium and high frequency sound quality is obviously improved, The power and sound pressure are increased.
Furthermore, the graphene is added in the formula, the specific gravity of the polypropylene is reduced, the application of the polypropylene is reduced in the process of manufacturing the loudspeaker cone, the spare part of the polypropylene is replaced by the graphene, and the thickness of the cone can be reduced due to the good mechanical strength of the graphene. The kapok fiber is used as a natural cellulose fiber, has a unique structure with a thin wall and a large hollow cavity, has a hollow rate far higher than other existing fibers, is a good heat insulation, sound insulation, heat preservation and buoyancy material, can effectively absorb noise of the loudspeaker, and improves the definition and quality of the sound of the loudspeaker.
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 (6)
1. The graphene cone formula is characterized by comprising the following raw materials in parts by weight: 30-40% of pulp board (EKB), 50-58% of pulp board (northern wood), 2-5% of kapok fiber, 8-12% of direct black and red light 3BG dye, 8-10% of aluminum sulfate, 8-12% of industrial salt, 0.2-1% of graphene, 40-50% of polypropylene raw material, 1-1.5% of lubricant, 4.5-3% of maleic anhydride and 1-0.5% of white oil.
2. The graphene cone formula according to claim 1, wherein the pulp board (EKB) has a water content of 12%, the pulp board (North wood) has a water content of 12%, the kapok fiber has a water content of 12%, the direct black-and-red 3BG dye has a water content of 0.00%, the aluminum sulfate has a water content of 0.00%, and the industrial salt has a water content of 0.00%.
3. The graphene cone formula according to claim 1, wherein the pulp board (EKB) and the pulp board (North wood) are both natural-color sulfate softwood pulp or a wood board made of bleached sulfate softwood pulp, and the industrial salt is a mixture of sodium chloride and sodium nitrite.
4. The graphene cone formula according to claim 1, wherein the graphene is a single layer of carbon atoms formed by infiltrating carbon atoms into ruthenium at 1150 ℃ and cooling to 850 ℃, and the graphene can be one of single-layer graphene, few-layer graphene, double graphene or multi-layer graphene.
5. The graphene cone formula according to claim 1, wherein the maleic anhydride is stored in a sealed box and is opened before use to prevent leakage, and the maximum allowable concentration of the maleic anhydride is 1.0mg/L and the maximum allowable concentration is 0.2mg/m3The storage process is carried out in a cool, dry and well ventilated storehouse.
6. The graphene cone production process is characterized by comprising the following steps:
1) taking the pulp board (EKB) and the pulp board (North wood) in parts by mass, adding the EKB and the pulp board into a pulping machine, adding water according to the proportion of (1: 3), and pulping;
2) pulling out the slurry polished in the first step, wherein the water content of the slurry is controlled to be 12-20%, and adding the kapok fiber, the direct black-red light 3BG dye, the aluminum sulfate, the industrial salt, the graphene, the polypropylene raw material, the lubricant, the maleic anhydride and the white oil in parts by weight into the slurry for fully mixing;
3) pouring the fully mixed raw materials in the step two into a loudspeaker cone mould respectively, and performing film pressing forming on the loudspeaker cone mould;
4) baking and solidifying the semi-finished product formed by pressing the film, and polishing the surface of the product after cooling to obtain a loudspeaker cone;
5) and (4) taking the finished loudspeaker cone finished in the step four, and mounting the finished loudspeaker cone on a loudspeaker to detect the product quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111119833.6A CN113846513A (en) | 2021-09-24 | 2021-09-24 | Graphene paper basin formula and production process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111119833.6A CN113846513A (en) | 2021-09-24 | 2021-09-24 | Graphene paper basin formula and production process |
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| CN113846513A true CN113846513A (en) | 2021-12-28 |
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| CN202111119833.6A Pending CN113846513A (en) | 2021-09-24 | 2021-09-24 | Graphene paper basin formula and production process |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948211A (en) * | 2017-01-20 | 2017-07-14 | 广西玉林市禹力音响配件有限公司 | A kind of water proof fire retardant cone |
| CN108978326A (en) * | 2018-06-21 | 2018-12-11 | 华南理工大学 | A kind of slurry of loudspeaker drum paper |
| CN109024067A (en) * | 2018-09-18 | 2018-12-18 | 深圳市烽火宏声科技有限公司 | Graphene diffuser and its manufacturing method, loudspeaker |
| CN111910462A (en) * | 2020-08-06 | 2020-11-10 | 国光电器股份有限公司 | Paper cone containing carbon fibers for loudspeaker and preparation method thereof |
-
2021
- 2021-09-24 CN CN202111119833.6A patent/CN113846513A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948211A (en) * | 2017-01-20 | 2017-07-14 | 广西玉林市禹力音响配件有限公司 | A kind of water proof fire retardant cone |
| CN108978326A (en) * | 2018-06-21 | 2018-12-11 | 华南理工大学 | A kind of slurry of loudspeaker drum paper |
| CN109024067A (en) * | 2018-09-18 | 2018-12-18 | 深圳市烽火宏声科技有限公司 | Graphene diffuser and its manufacturing method, loudspeaker |
| CN111910462A (en) * | 2020-08-06 | 2020-11-10 | 国光电器股份有限公司 | Paper cone containing carbon fibers for loudspeaker and preparation method thereof |
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Application publication date: 20211228 |
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