CN108978326B - Sizing agent for loudspeaker drum paper - Google Patents
Sizing agent for loudspeaker drum paper Download PDFInfo
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- CN108978326B CN108978326B CN201810643383.2A CN201810643383A CN108978326B CN 108978326 B CN108978326 B CN 108978326B CN 201810643383 A CN201810643383 A CN 201810643383A CN 108978326 B CN108978326 B CN 108978326B
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- cellulose
- drum paper
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
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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
- 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
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/28—Organic non-cellulose fibres from natural polymers
- D21H13/34—Protein fibres
-
- 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
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/38—Inorganic fibres or flakes siliceous
- D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass fibres
-
- 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
- D21H21/06—Paper forming aids
- D21H21/08—Dispersing agents for fibres
-
- 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
- D21H21/16—Sizing or water-repelling agents
Abstract
The invention discloses a sizing agent for loudspeaker drum paper. The slurry consists of the following components: wood pulp fibers, cotton fibers, natural silk, wool fibers, ballistic fibers, nanocellulose, specialty fibers, glass fibers, fly ash, phenolic resin, hydroxyethyl cellulose, flow and filter aids, dyes, sizing agents, dispersants polyethylene oxide (PEO). The preparation process comprises the following steps: firstly, defibering and dispersing various fibers such as wood pulp fibers, cotton fibers, nano cellulose fibers and the like to prepare mixed fiber pulp, then adding the chemical reagent, papermaking by a papermaking machine, and then preparing by a subsequent conventional preparation method with drum paper to obtain the trumpet drum paper containing nano cellulose. The drum paper prepared by mixing the three fibers has excellent rigidity and softness and higher Young modulus, so that the definition of medium and high audio frequencies of the drum paper is greatly improved, and the service life of the drum paper is prolonged.
Description
Technical Field
The invention relates to the field of pulping and papermaking, in particular to a pulp for loudspeaker drum paper.
Background
At present, materials used as loudspeaker drum paper in the market are generally paper basins, bulletproof cloth basins, aluminum and magnesium metal basins, polypropylene basins, wool fiber basins, ceramic basins and the like. The paper cone has the advantages of being good in rigidity and flexibility, high in internal damping, easy to mix with other materials and the like. The tone expression is mainly the pulp used for the trumpet paper plus other fiber materials or other functional materials, however, the pulp used for the mainstream trumpet paper is also the pulp. Mainly because the cone has the advantages of being good in rigidity and flexibility, high in internal damping, easy to mix with other materials, low in manufacturing cost of slurry and the like. The type of slurry contained within the horn paper generally determines the quality of the horn sound. Most of pulp of the trumpet-shaped drum paper made of paper pulp in the market is mixed with fibers such as softwood pulp, hardwood pulp and the like, but the trumpet-shaped paper made of paper also has the defects of the trumpet-shaped drum paper, and the characteristics that the trumpet-shaped drum paper is easy to damage and the trumpet-shaped drum paper is easy to absorb moisture due to the low Young modulus of the trumpet-shaped drum paper limit the application range of the trumpet-shaped drum paper.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to overcome the above-mentioned drawbacks and deficiencies and to provide a new pulp furnish for drum paper. The sizing agent adopted by the trumpet-shaped drum paper can obviously improve the Young modulus of the drum paper, and the neutral sizing agent added in the trumpet-shaped drum paper changes the prior method that only sizing is carried out on the surface of the paper. The moisture absorption resistance of the paper is enhanced. The drum paper manufactured by the method not only can greatly improve the definition of medium and high audio frequencies of the drum paper, but also can prolong the service life of the drum paper.
The invention is realized by the following technical scheme:
the slurry for the loudspeaker drum paper is prepared by mixing and dispersing the following raw materials in parts by weight: 40-60 parts of wood pulp fiber, 10-25 parts of cotton fiber, 10-20 parts of natural silk, 4-8 parts of wool fiber, 0.1-0.8 part of bulletproof fiber, 0.05-1 part of nano cellulose, 1-3 parts of special fiber, 0.1-0.5 part of glass fiber, 3-5 parts of phenolic resin, 1-3 parts of hydroxyethyl cellulose, 1-3 parts of flow-assisting and filter aid, 2-8 parts of dye, 1-5 parts of sizing agent and 0.5-1 part of dispersant polyethylene oxide (PEO).
Preferably, the material is prepared by mixing and dispersing the following raw materials in parts by weight: 45-55 parts of wood pulp fiber, 16-25 parts of cotton fiber, 10-18 parts of natural silk, 4-6 parts of wool fiber, 0.3-0.8 part of bulletproof fiber, 0.05-0.5 part of nano cellulose, 2-3 parts of special fiber, 0.3-0.5 part of glass fiber, 3.5-4.5 parts of phenolic resin, 1-2 parts of hydroxyethyl cellulose, 2-3 parts of flow aid and filter aid, 2-6 parts of dye, 2-5 parts of sizing agent and 0.5-0.8 part of dispersant polyethylene oxide (PEO).
Preferably, the material is prepared by mixing and dispersing the following raw materials in parts by weight: 50 parts of wood pulp fiber, 20 parts of cotton fiber, 15 parts of natural silk, 5 parts of wool fiber, 0.5 part of bulletproof fiber, 0.5 part of nano-cellulose, 3 parts of special fiber, 0.4 part of glass fiber, 4 parts of phenolic resin, 1.5 parts of hydroxyethyl cellulose, 3 parts of flow-aiding and filter aid, 4 parts of dye, 3 parts of sizing agent and 0.6 part of dispersing agent polyethylene oxide (PEO).
Preferably, the wood pulp fibers are bleached kraft softwood pulp.
Preferably, the nano cellulose is bacterial cellulose and aramid fiber.
Preferably, the sizing agent is an alkyl ketene dimer.
Preferably, the flow and filter aid is guar gum.
Preferably, the special fiber is an aramid fiber.
Preferably, the mass ratio of the bacterial cellulose to the aramid fiber is 1: 2-6.
The components used in the invention are as follows:
bacterial cellulose refers to cellulose synthesized by some microorganisms in certain bacteria under different conditions. The bacterial cellulose belongs to nano cellulose because the diameter of the bacterial cellulose is in the nano level. Bacterial cellulose has the same molecular structural unit as natural cellulose in plants, while bacterial cellulose fiber has many unique properties. The bacterial cellulose has high crystallinity and high polymerization degree; the elastic modulus is several times to more than ten times of that of common plant fibers, and the tensile strength is high. High purity, high crystallinity, high polymerization degree and high molecular orientation, and has excellent mechanical property. After hot pressing treatment, the Young modulus can reach 30 gigapascals, and the Young modulus is 4 times higher than that of the organic synthetic fiber.
The alkyl ketene dimers are formed from higher saturated fatty acids (typically C)14～C18) Reacting with phosphorus trichloride to generate stearic acid acyl chloride, reacting with triethylamine in an ether medium, and deacidifying and polymerizing to obtain a dimer. The alkyl ketene dimer is used for sizing, a precipitator such as alum is not needed to be added, an alkaline filler such as carbonic anhydride can be used, and the dried paper sheet has excellent water resistance and good durability.
Aramid fiber is a novel high-tech synthetic fiber, has super high strength, high modulus and high temperature resistance, acid and alkali resistance, light weight and other excellent properties, and its intensity is 5 ~ 6 times of steel wire, and the modulus is 2 ~ 3 times of steel wire or glass fiber, and toughness is 2 times of steel wire, and weight is only about 1/5 of steel wire, under 560 degrees of temperature, does not decompose, does not melt. The fiber has special strength performance to the strength of the drum paper, and can prolong the service life of the drum paper.
Cationic guar gum is a water-soluble high molecular polymer with the chemical name of guar gum hydroxypropyl trimethyl ammonium chloride. Due to the unique molecular structure characteristics and the nature, the paper pulp quickly becomes a novel environment-friendly papermaking auxiliary agent with excellent performance; meanwhile, the method is widely applied to the fields of food, petroleum, medicine and the like.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts wood pulp, cotton pulp fiber and natural silk as main raw materials. The dispersion molding characteristics of wood pulp, cotton pulp and natural silk are fully utilized, and fibers with high strength and high elastic modulus, such as wool fibers, bulletproof fibers, glass fibers and the like, are added. The main fiber framework of the drum paper has the advantages of thick section, high strength, more turning, good elasticity, mercerization and large cohesive force among fibers. The internal damping performance of the cone is greatly improved, and the high-frequency tone quality fineness and the definition of the high-frequency tone quality of the sound are greatly improved. In addition, the elastic modulus, the moisture absorption resistance and the like of the paper cone are improved by adding the nano-cellulose, the dispersing agent and the sizing agent.
The sizing agent, the dispersing agent and the flow-aiding and filter-aiding agent are added to generate the synergistic enhancement effect with the components of bleached sulfate pulp, cotton pulp, natural silk and the like. The loudspeaker drum paper prepared by the sizing agent and the functional filler has excellent rigidity and softness, higher Young modulus, greatly improved definition of medium and high audio frequencies and prolonged service life.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1
The sizing agent for the loudspeaker drum paper comprises the following raw materials in parts by weight: 50 parts of wood pulp fiber, 20 parts of cotton fiber, 15 parts of natural silk, 5 parts of wool fiber, 0.5 part of bulletproof fiber, 0.5 part of nano-cellulose, 1 part of special fiber, 0.4 part of glass fiber, 4 parts of phenolic resin, 1.5 parts of hydroxyethyl cellulose, 3 parts of flow-aiding and filter-aid agent, 4 parts of dye direct suntan G, 3 parts of sizing agent and 0.6 part of dispersing agent polyethylene oxide (PEO), wherein the nano-cellulose is prepared by mixing bacterial cellulose and aramid fiber according to the mass ratio of 1:2, and the like. Firstly, wood pulp fiber, cotton fiber, natural silk, wool fiber, bulletproof fiber, nano-cellulose, special fiber, glass fiber, phenolic resin and hydroxyethyl cellulose are defibered and dispersed to prepare mixed fiber slurry, then inflow filter aid (guar gum), direct dye-fast black G, sizing agent (alkyl ketene dimer) and dispersant polyethylene oxide (PEO) are added, paper is made through a paper machine, and then the trumpet drum paper containing the nano-cellulose is prepared according to a conventional drum paper preparation method.
Example 2
The sizing agent for the loudspeaker drum paper comprises the following raw materials in parts by weight: 50 parts of wood pulp fiber, 20 parts of cotton fiber, 15 parts of natural silk, 5 parts of wool fiber, 0.5 part of bulletproof fiber, 0.5 part of nano-cellulose, 2 parts of special fiber, 0.4 part of glass fiber, 4 parts of phenolic resin, 1.5 parts of hydroxyethyl cellulose, 3 parts of flow-aiding and filter-aid agent, 4 parts of dye direct suntan G, 3 parts of sizing agent and 0.6 part of dispersing agent polyethylene oxide (PEO), wherein the nano-cellulose is prepared by mixing the following components in a mass ratio of (1): 4 in proportion. Firstly, wood pulp fibers, cotton fibers, natural silk, wool fibers, bulletproof fibers, nano-cellulose, special fibers, glass fibers, phenolic resin and hydroxyethyl cellulose are defibered and dispersed to prepare mixed fiber slurry, then flow-aid and filter aid (guar gum), direct dye-fast black G, sizing agent (alkyl ketene dimer) and dispersant polyethylene oxide (PEO) are added, paper is made through a paper machine, and then the trumpet drum paper containing the nano-cellulose is prepared according to a conventional drum paper preparation method.
Example 3
The sizing agent for the loudspeaker drum paper comprises the following raw materials in parts by weight: 50 parts of wood pulp fiber, 20 parts of cotton fiber, 15 parts of natural silk, 5 parts of wool fiber, 0.5 part of bulletproof fiber, 0.5 part of nano-cellulose, 3 parts of special fiber, 0.4 part of glass fiber, 4 parts of phenolic resin, 1.5 parts of hydroxyethyl cellulose, 3 parts of flow-aiding and filter-aid agent, 4 parts of dye direct suntan G, 3 parts of sizing agent and 0.6 part of dispersing agent polyethylene oxide (PEO), wherein the nano-cellulose is prepared by mixing bacterial cellulose and aramid fiber according to the mass ratio of 1: 6. Firstly, wood pulp fibers, cotton fibers, natural silk, wool fibers, bulletproof fibers, nano-cellulose, special fibers, glass fibers, phenolic resin and hydroxyethyl cellulose are defibered and dispersed to prepare mixed fiber slurry, then flow-aid and filter aid (guar gum), direct dye-fast black G, sizing agent (alkyl ketene dimer) and dispersant polyethylene oxide (PEO) are added, paper is made through a paper machine, and then the trumpet drum paper containing the nano-cellulose is prepared according to a conventional drum paper preparation method.
In order to verify the performance of the cone of the present invention, the tensile strength, burst strength, young's modulus of the cone of each embodiment of the present invention were measured, and the following results were obtained for a horn having a diameter of 120mm and a depth of 80mm, as shown in table 1 below:
TABLE 1
From the above data, it was found that the present invention confirmed that as the proportion of aramid fiber increases, the bursting strength, tensile strength and young's modulus of drum paper are all improved due to the high strength of aramid fiber and the high crystallinity of bacterial cellulose. The proportioning sizing agent not only improves the definition of the medium and high audio frequency of the drum paper sound and the service life of the drum paper. In addition, the internal damping performance of the horn is improved.
Claims (3)
1. The slurry for the loudspeaker drum paper is characterized by being prepared by mixing and dispersing the following raw materials in parts by weight: 40-60 parts of wood pulp fiber, 10-25 parts of cotton fiber, 10-20 parts of natural silk, 4-8 parts of wool fiber, 0.1-0.8 part of bulletproof fiber, 0.05-1 part of nano cellulose, 1-3 parts of special fiber, 0.1-0.5 part of glass fiber, 3-5 parts of phenolic resin, 1-3 parts of hydroxyethyl cellulose, 1-3 parts of flow-assisting and filter aid, 2-8 parts of dye, 1-5 parts of sizing agent and 0.5-1 part of dispersant polyethylene oxide (PEO);
the wood pulp fiber is bleached sulfate softwood pulp;
the nano-cellulose is bacterial cellulose and aramid fiber;
the sizing agent is alkyl ketene dimer;
the flow aid and filter aid is guar gum;
the special fiber is aramid fiber;
the mass ratio of the bacterial cellulose to the aramid fiber in the nano-cellulose is 1: 2-6.
2. The loudspeaker drum paper pulp as claimed in claim 1, which is prepared by mixing and dispersing the following raw materials in parts by weight: 45-55 parts of wood pulp fiber, 16-25 parts of cotton fiber, 10-18 parts of natural silk, 4-6 parts of wool fiber, 0.3-0.8 part of bulletproof fiber, 0.05-0.5 part of nano cellulose, 2-3 parts of special fiber, 0.3-0.5 part of glass fiber, 3.5-4.5 parts of phenolic resin, 1-2 parts of hydroxyethyl cellulose, 2-3 parts of flow aid and filter aid, 2-6 parts of dye, 2-5 parts of sizing agent and 0.5-0.8 part of dispersant polyethylene oxide (PEO).
3. The loudspeaker drum paper pulp as claimed in claim 1, which is prepared by mixing and dispersing the following raw materials in parts by weight: 50 parts of wood pulp fiber, 20 parts of cotton fiber, 15 parts of natural silk, 5 parts of wool fiber, 0.5 part of bulletproof fiber, 0.5 part of nano-cellulose, 3 parts of special fiber, 0.4 part of glass fiber, 4 parts of phenolic resin, 1.5 parts of hydroxyethyl cellulose, 3 parts of flow-aiding and filter aid, 4 parts of dye, 3 parts of sizing agent and 0.6 part of dispersing agent polyethylene oxide (PEO).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810643383.2A CN108978326B (en) | 2018-06-21 | 2018-06-21 | Sizing agent for loudspeaker drum paper |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810643383.2A CN108978326B (en) | 2018-06-21 | 2018-06-21 | Sizing agent for loudspeaker drum paper |
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| CN108978326A CN108978326A (en) | 2018-12-11 |
| CN108978326B true CN108978326B (en) | 2021-07-20 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111294722B (en) * | 2020-03-16 | 2021-04-13 | 广东飞浦声科技有限公司 | Dustproof loudspeaker machining method |
| CN111648162A (en) * | 2020-06-15 | 2020-09-11 | 南京闻乐声学科技有限公司 | Loudspeaker cone paper cone |
| CN111996829B (en) * | 2020-09-08 | 2022-10-04 | 国光电器股份有限公司 | Paper cone containing bulletproof fiber pulp for loudspeaker and preparation method thereof |
| CN113047080A (en) * | 2021-03-31 | 2021-06-29 | 陕西科技大学 | Colored paper and preparation method thereof |
| CN113846513A (en) * | 2021-09-24 | 2021-12-28 | 惠州市柳盛科技有限公司 | Graphene paper basin formula and production process |
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