CN107892889A - A kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker and preparation method thereof - Google Patents

A kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker and preparation method thereof Download PDF

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Publication number
CN107892889A
CN107892889A CN201711230841.1A CN201711230841A CN107892889A CN 107892889 A CN107892889 A CN 107892889A CN 201711230841 A CN201711230841 A CN 201711230841A CN 107892889 A CN107892889 A CN 107892889A
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parts
adhesive tape
double faced
faced adhesive
loudspeaker
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CN107892889B (en
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吴振兴
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XIAMEN GREAT SOUND TECHNOLOGY Co Ltd
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XIAMEN GREAT SOUND TECHNOLOGY Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04—Homopolymers or copolymers of esters
    • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/062—Copolymers with monomers not covered by C09J133/06
    • C09J133/064—Copolymers with monomers not covered by C09J133/06 containing anhydride, COOH or COOM groups, with M being metal or onium-cation
    • 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
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • 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
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/12—Esters of monohydric alcohols or phenols
    • C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • C08F220/1808—C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Inorganic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

The present invention provides a kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker and preparation method thereof, is related to mucilage materialses technical field.The raw material of this double faced adhesive tape includes monomer, tackifying resin, organic solvent, initiator and crosslinking agent, in parts by weight, monomer includes 50 60 parts of Isooctyl acrylate monomers, 10 15 parts of butyl acrylates, 25 parts of Isobutyl methacrylates and 26 parts of acrylic acid, tackifying resin are 22 28 parts, and organic solvent is 80 90 parts, initiator is 0.1 0.5 parts, and crosslinking agent is 0.05 0.4 parts.In addition the invention further relates to the preparation method of this double faced adhesive tape.By from suitable comonomer, function monomer and tackifying resin, polymerisation obtains double faced adhesive tape in the presence of initiator and crosslinking agent, with intensity high, adhesive property strong, high temperature resistant, spreading resistance etc., when being especially applicable in the vibrating diaphragm of loudspeaker, the ultra-wide yupin effect of loudspeaker can be ensured, meet the needs of high definition voice.

Description

A kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker and preparation method thereof
Technical field
The present invention relates to adhesives technical field, and it is more particularly to a kind of for the two-sided of the ultra-wideband diaphragm of loudspeaker Glue.
Background technology
With the progress of science and technology and the development of society, people are to electro-acoustic product, such as by sound device, the high definition voice of loudspeaker The requirement of communication is more and more high.Electro-acoustic element requirement develops towards small-sized, high sensitivity, high tone quality, high-fidelity, ultra-wideband.It is high Clear voice is largely dependent on the vibrating diaphragm performance in electro-acoustic product.In the prior art much to the structure and material performance of vibrating diaphragm Transformed, to obtain the electro-acoustic product of loud sound quality.But the transformation of diaphragm structure and material is complicated, cost is high, changes The DeGrain of kind voice quality.
Inventor, which studies, to be found, the material impact of the voice quality of electro-acoustic element by vibrating diaphragm material and structure.It is existing Diaphragm structure includes top dome portion, ring portion and outstanding edge, and top dome portion is located among vibrating diaphragm, as vibration main body, sets in ring portion week In top dome portion, outstanding edge is located at the edge in ring portion, is fixed on support.Require that vibrating diaphragm possesses in high definition voice call process High sensitivity, high power, the feature of high tone quality, and then covering broadband is realized, thus it requires the top dome portion of vibrating diaphragm needs Enough rigidity are to strengthen frequency range.There are some researches show compound by adhesive by materials such as polyester, polyimide, polyether-ether-ketones Composite is formed together to be used to make vibrating diaphragm, be disclosure satisfy that the rigid demand in vibrating diaphragm top dome portion, can be lifted electro-acoustic element Performance.But in use, adhesive is easily heated to decline strength and stiffness, influences adhesive property.In addition, glue Stick easily produces polarization, product stability is deteriorated, total harmonic distortion, the cut-off of high frequency when big displacement vibration occurs for vibrating diaphragm Frequency reduces, and can not meet the needs of to high definition voice.
The content of the invention
It is an object of the invention to provide a kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker, this double faced adhesive tape has bonding Performance is strong, has the characteristic such as intensity and vibration absorbing performance, fine heat radiation property concurrently, realizes that diaphragm structure covers ultra-wide band loudspeaker.
Another object of the present invention is to provide a kind of preparation method of the double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker, this Preparation method is simple, is easily achieved, and is mass produced suitable for industrialization.
The present invention is solved its technical problem and realized using following technical scheme.
The present invention proposes a kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker, and the raw material of this double faced adhesive tape includes monomer, increased Viscosity resin, organic solvent, initiator and crosslinking agent, in parts by weight, monomer include 50-60 parts Isooctyl acrylate monomer, 10- 15 parts of butyl acrylates, 2-5 parts Isobutyl methacrylate and the acrylic acid of 2-6 parts, tackifying resin is 22-28 parts, organic Solvent is 80-90 parts, and initiator is 0.1-0.5 parts, and institute's crosslinking agent is 0.05-0.4 parts.
The present invention proposes a kind of preparation method of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker, and it comprises the following steps：
S1, take the organic solvent of 1/5-2/5 monomer, 1/5-2/5 initiator and 1/5-2/5 to stir, be warming up to 75 DEG C- 80 DEG C are reacted to obtain the first reactant；
S2, is added dropwise mixed liquor in the first reactant, mixed liquor include remaining monomer, 1/5-2/5 organic solvent with And 1/5-2/5 initiator, remaining initiator is added after completion of dropwise addition, 1.5-3h is incubated, obtains the second reactant；
S3, dissolves the tackifying resin with remaining organic solvent, is then added to the second reactant, adds and hands over after mixing Join agent, the double faced adhesive tape is obtained after being stirred.
The beneficial effect of the double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker of the embodiment of the present invention and preparation method thereof is：
Isooctyl acrylate monomer, butyl acrylate, Isobutyl methacrylate enable to product as sticky comonomer With good adhesive effect.Acrylic acid can play crosslinked action with other monomers, promote polymerisation, add as function monomer Fast polymerization speed, and the stability of product is effectively ensured.Tackifying resin is added simultaneously, makes the polymer and thickening of above-mentioned each monomer Chemical combination bonding occurs for interlaminar resin, and bonding force is more preferable, and further increases cohesive force, heat resistance of product etc..In addition, initiator and The use of crosslinking agent, and in preparation process, using stage feeding polymerization, the performance by specific handling process product is big Big to improve, such as mechanical performance, heat resistance, adhesive property, vibration absorbing performance are greatly improved.Should by obtained double faced adhesive tape The composite of vibrating diaphragm is prepared for loudspeaker, effectively each component can not only be bonded, strengthens the support of composite Intensity and rigidity, additionally it is possible to the performance such as absorbing of further reinforced composite, realize that diaphragm structure covers ultra-wide band loudspeaker, Meets the needs of high definition voice communication.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of embodiment of the present invention Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, therefore be not to be seen as It is the restriction to scope, for those of ordinary skill in the art, on the premise of not paying creative work, can be with root Other related accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the stereogram of vibrating diaphragm in loudspeaker of the embodiment of the present invention；
Fig. 2 is sectional view of the vibrating diaphragm along C-C directions shown in Fig. 1；
Fig. 3 is enlarged drawing at vibrating diaphragm A shown in Fig. 2；
Fig. 4 is enlarged drawing at vibrating diaphragm B shown in Fig. 2.
Icon：1- vibrating diaphragms；1A- basic units；Pasted in 1B-；11- top domes；12- rings；13- hangs side；112- corrugated parts；1A1- One restraint layer；1A2- glue-lines；The restraint layers of 1B1- the 3rd；The restraint layers of 1B2- second；1B3- sound-absorbing particles.
Embodiment
, below will be in the embodiment of the present invention to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer Technical scheme be clearly and completely described.Unreceipted actual conditions person, builds according to normal condition or manufacturer in embodiment The condition of view is carried out.Agents useful for same or the unreceipted production firm person of instrument, it is the conventional production that can be obtained by commercially available purchase Product.
Double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker of the embodiment of the present invention and preparation method thereof is carried out below specific Explanation.
A kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker provided in an embodiment of the present invention, the raw material of this double faced adhesive tape include Monomer, tackifying resin, organic solvent, initiator and crosslinking agent, in parts by weight, it is different that monomer includes 50-60 part acrylic acid Monooctyl ester, 10-15 parts butyl acrylate, 2-5 parts Isobutyl methacrylate and the acrylic acid of 2-6 parts, tackifying resin 22-28 Part, organic solvent is 80-90 parts, and initiator is 0.1-0.5 parts, and institute's crosslinking agent is 0.05-0.4 parts.
Further, in preferred embodiments of the present invention, in parts by weight, Isooctyl acrylate monomer is 53-54 parts, Butyl acrylate is 12-13 parts, and Isobutyl methacrylate is 4-5 parts, acrylic acid is 3-4 parts, tackifying resin be 25-26 parts, Initiator is 0.3-0.5 parts, and crosslinking agent is 0.1-0.2 parts.By the monomer under above-mentioned specific proportioning, resin, initiator, crosslinking agent It polymerize obtained double faced adhesive tape function admirable, when adhesive thickness is 5 microns, adhesion strength reaches more than 1.5kg/in.And can Different gluing of surfaces is adapted to very well.
Further, in preferred embodiments of the present invention, tackifying resin is modified rosin resin or terpene resin.Enter one Step is preferably modified rosin resin.Modified rosin resin can use commercially available prod, can also make by oneself.Such as changed from fumaric acid Property rosin resin, preparation method are：The fumaric acid of 50 parts by weight and the rosin of 15 parts by weight are mixed, under N2 protection, risen Then temperature is warming up to 190~210 DEG C, adds the pentaerythrite and 0.0015 of 8 parts by weight again to 150~170 DEG C of 2~3h of reaction The catalyst of parts by weight, 1~2h of reaction obtain modified rosin resin.The softening point height of modified rosin resin, lighter color, bonding force By force, cohesive force is big, heat resistance is high, ageing-resistant, is combined with the polymer of other monomers, can further improve properties of product.
Further, in preferred embodiments of the present invention, crosslinking agent is praseodynium aluminium, and initiator is benzoyl peroxide Formyl or azodiisobutyronitrile.During using praseodynium aluminium as crosslinking agent, the performance of product greatly improves, such as mechanicalness Energy, heat resistance, environmental stress cracking resistance obtain improving enable to tackifying resin and each monomer to be formed polymer it Between be chemically bonded, be cross-linked to form the network structure of densification, keeping on the basis of product has excellent in toughness, improving product Intensity.
Further, in preferred embodiments of the present invention, the raw material of double faced adhesive tape also includes modified component, according to parts by weight Number meter, modified component include the modified carbon nano-tube of 0.1-0.5 parts.Carbon nanotubes are light, have special mechanics, electricity and Chemical property.Especially CNT has larger damping value, and light weight in itself, can be Nian Jie with compound material seamless. Modified carbon nano-tube is added, can effectively strengthen the intensity of product, meanwhile, CNT has high toughness, sufficiently flexible. Enhancement layer is formed in the composite for forming vibrating diaphragm, meets the rigid demand of the top dome part of vibrating diaphragm, and further improve The shock attenuation result of composite inner.In addition, the heat-conducting effect of CNT enables to product to have excellent heat dispersion, Avoid in use because temperature change causes product bonding force and intensity to be deteriorated.
Further, in preferred embodiments of the present invention, the method for modifying of modified carbon nano-tube is：CNT is soaked Enter and reacted into the alkaline aqueous solution containing dopamine.Further, the concentration of dopamine is 1~3g/L.Alkaline aqueous solution PH value be 7.5~12, the reaction time is 3~7h.
Oxidation-auto polymerization reaction can occur under aqueous basic conditions for dopamine, form strength and attach to carbon nanometer The poly-dopamine functional skin layer of pipe surface.Poly-dopamine functional skin layer has outstanding surface-active, and adhesion is very strong, can Improve the surface property of CNT, enabling to the surface property of CNT is improved, so as to uniformly divide in the product Dissipate, and and other compositions form good combination.
Further, in preferred embodiments of the present invention, organic solvent is from one in toluene, dimethylbenzene, durene Kind is a variety of.
The present invention proposes a kind of preparation method of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker, and it comprises the following steps：
S1, take the organic solvent of 1/5-2/5 monomer, 1/5-2/5 initiator and 1/5-2/5 to stir, be warming up to 75 DEG C- 80 DEG C are reacted to obtain the first reactant；
S2, is added dropwise mixed liquor in the first reactant, mixed liquor include remaining monomer, 1/5-2/5 organic solvent with And 1/5-2/5 initiator, remaining initiator is added after completion of dropwise addition, 1.5-3h is incubated, obtains the second reactant；
S3, tackifying resin is dissolved with remaining organic solvent, is then added to the second reactant, crosslinking is added after mixing Agent, double faced adhesive tape is obtained after being stirred.
Segmentation reaction is carried out by S1 steps and S2 steps, ensures that each component can fully be reacted, forms quality The product of stable homogeneous, polymer internally form the network structure of densification, further enhance intensity.Preferably, in S1 steps, Reaction time is 0.5~1h.
Further, in preferred embodiments of the present invention, in step S1, it is additionally added catalyst and is reacted, catalyst Including rare earth oxide and Na-X molecular sieves.Further, in step S1, the dosage of catalyst is the 0.03 of all monomer total amounts ~0.06%, catalytic reaction efficiency high, product quality is excellent.Preferably, catalyst is that mass ratio is 1:1:0.3 Y2O3、 Nd2O3With Na-X molecular sieves.Using the catalyst, product rapid polymerization is enabled to, and obtained product has stronger carrying Power.
Further, in preferred embodiments of the present invention, in step S2, mixed liquor also includes modified carbon nano-tube and urged Agent.In step S2, the dosage of catalyst is the 0.03~0.06% of all monomer total amounts.
Further, in step S2, the rate of addition of mixed liquor is 1~3d/s, is stirred continuously during dropwise addition, stirring speed Spend for 80~100rpm/min.It is slowly added dropwise, is stirred continuously simultaneously, effective dispersion products, ensures the homogeneity of polymerisation, enter And the performance of product is got a promotion.
The feature and performance of the present invention are described in further detail with reference to embodiments.
Embodiment 1
A kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker that the present embodiment provides, it is prepared into according to following steps Arrive：
(1) it is on the waiting list following raw material：
Monomer：53 parts of Isooctyl acrylate monomer, 13 parts of butyl acrylate, 5 parts of Isobutyl methacrylate and acrylic acid 3 Part；
Tackifying resin：26 parts of modified rosin resin；
Initiator：0.5 part of azodiisobutyronitrile；
Crosslinking agent：0.2 part of praseodynium aluminium；
Organic solvent：90 parts of toluene；
S1,1/3 monomer, 1/3 initiator and the stirring of 1/3 organic solvent are taken, 75 DEG C is warming up to and is reacted to obtain First reactant；
S2, is added dropwise mixed liquor in the first reactant, and mixed liquor includes remaining monomer, 1/3 organic solvent and 1/3 Initiator, add remaining initiator after completion of dropwise addition, be incubated 1.5h, obtain the second reactant；
S3, tackifying resin is dissolved with remaining organic solvent, is then added to the second reactant, crosslinking is added after mixing Agent, double faced adhesive tape is obtained after being stirred.
Embodiment 2
A kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker that the present embodiment provides, it is prepared into according to following steps Arrive：
(1) it is on the waiting list following raw material：
Monomer：54 parts of Isooctyl acrylate monomer, 12 parts of butyl acrylate, 4 parts of Isobutyl methacrylate and acrylic acid 4 Part；
Tackifying resin：25 parts of modified rosin resin；
Initiator：0.3 part of azodiisobutyronitrile；
Crosslinking agent：0.1 part of praseodynium aluminium；
Organic solvent：81 parts of toluene；
S1,1/3 monomer, 1/3 initiator and the stirring of 1/3 organic solvent are taken, 80 DEG C is warming up to and is reacted to obtain First reactant；
S2, is added dropwise mixed liquor in the first reactant, and mixed liquor includes remaining monomer, 1/3 organic solvent and 1/3 Initiator, add remaining initiator after completion of dropwise addition, be incubated 2h, obtain the second reactant；
S3, tackifying resin is dissolved with remaining organic solvent, is then added to the second reactant, crosslinking is added after mixing Agent, double faced adhesive tape is obtained after being stirred.
Embodiment 3
A kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker that the present embodiment provides, it is prepared into according to following steps Arrive：
(1) it is on the waiting list following raw material：
Monomer：50 parts of Isooctyl acrylate monomer, 15 parts of butyl acrylate, 2 parts of Isobutyl methacrylate and acrylic acid 6 Part；
Tackifying resin：28 parts of modified rosin resin；
Initiator：0.1 part of azodiisobutyronitrile；
Crosslinking agent：0.05 part of praseodynium aluminium；
Organic solvent：90 parts of toluene；
Modified component：0.3 part of modified carbon nano-tube；
Catalyst：Mass ratio is 1:1:0.3 Y2O3、Nd2O3With 0.08 part of Na-X molecular sieves.
S1,1/3 monomer, 1/3 initiator, 1/3 organic solvent and the stirring of 1/2 catalyst are taken, is warming up to 80 DEG C Reacted to obtain the first reactant；
S2, is added dropwise mixed liquor in the first reactant, and mixed liquor includes remaining monomer, 1/3 organic solvent, 1/3 Initiator, modified carbon nano-tube and 1/2 catalyst, remaining initiator is added after completion of dropwise addition, be incubated 2h, it is anti-to obtain second Answer thing；
S3, tackifying resin is dissolved with remaining organic solvent, is then added to the second reactant, crosslinking is added after mixing Agent, double faced adhesive tape is obtained after being stirred.
Embodiment 4
A kind of double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker that the present embodiment provides, it is prepared into according to following steps Arrive：
(1) it is on the waiting list following raw material：
Monomer：60 parts of Isooctyl acrylate monomer, 10 parts of butyl acrylate, 5 parts of Isobutyl methacrylate and acrylic acid 2 Part；
Tackifying resin：22 parts of modified rosin resin；
Initiator：0.5 part of azodiisobutyronitrile；
Crosslinking agent：- 0.4 part of praseodynium aluminium；
Organic solvent：90 parts of toluene；
Modified component：0.5 part of modified carbon nano-tube；
Catalyst：Mass ratio is 1:0.4 Nd2O3With 0.06 part of Na-X molecular sieves.
S1, take 1/3 monomer, 1/3 initiator, 1/3 organic solvent and 1/2 catalyst stirring, be warming up to 75 DEG C- 80 DEG C are reacted to obtain the first reactant；
S2, is added dropwise mixed liquor in the first reactant, and mixed liquor includes remaining monomer, 1/3 organic solvent, 1/3 Initiator, 1/2 catalyst and CNT, remaining initiator is added after completion of dropwise addition, be incubated 1.5-3h, it is anti-to obtain second Answer thing；
S3, tackifying resin is dissolved with remaining organic solvent, is then added to the second reactant, crosslinking is added after mixing Agent, double faced adhesive tape is obtained after being stirred.
Comparative example 1
A kind of double faced adhesive tape for the diaphragm of loudspeaker that this comparative example provides, its preparation method substantially phase with embodiment 1 Together, difference is, the formula of raw material is：
Monomer：30 parts of Isooctyl acrylate monomer, 30 parts of butyl acrylate, 6 parts of Isobutyl methacrylate and acrylic acid 8 Part；
Tackifying resin：26 parts of modified rosin resin；
Initiator：0.5 part of azodiisobutyronitrile；
Crosslinking agent：0.2 part of praseodynium aluminium；
Organic solvent：90 parts of toluene；
Comparative example 2
A kind of double faced adhesive tape for the diaphragm of loudspeaker that this comparative example provides, its preparation method substantially phase with embodiment 1 Together, difference is, the formula of raw material is：
Monomer：1 part of 70 parts of Isooctyl acrylate monomer, 5 parts of butyl acrylate, 1 part of Isobutyl methacrylate and acrylic acid；
Tackifying resin：26 parts of modified rosin resin；
Initiator：0.5 part of azodiisobutyronitrile；
Crosslinking agent：0.2 part of praseodynium aluminium；
Organic solvent：90 parts of toluene；
Comparative example 3
A kind of double faced adhesive tape for the diaphragm of loudspeaker that this comparative example provides, it is identical with the formula of embodiment 1, difference It is in and is prepared in it according to following steps：
S1, take above-mentioned monomer to add in organic solvent, stirring, be warming up to 75 DEG C and reacted to obtain the first reactant；
S2, initiator is added in the first reactant, react 3h, obtain the second reactant；
S3, tackifying resin is added to the second reactant, crosslinking agent is added after mixing, double faced adhesive tape is obtained after being stirred.
Test example
Double faced adhesive tape made from embodiment 1~4 and comparative example 1~3 is applied to vibrating diaphragm, the vibrating diaphragm uses composite, Composite includes layers of two-sided and is located at the polyether-ether-ketone layer on layers of two-sided two sides.Layers of two-sided using embodiment 1~4 with And the double faced adhesive tape that comparative example 1~3 provides.
The high-frequency cut-off frequency of above-mentioned sample is tested, as a result as shown in table 1.
The vibrating diaphragm high-frequency cut-off frequency test table of table 1
Frequency range Comparative example 1 Comparative example 2 Comparative example 3 Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4
20000 95.84 84.51 94.71 98.2 98.24 93.08 94.74
19000 95.7 85.63 94.02 98.52 97.38 99.51 98.74
18000 95.41 86.68 93.87 97.26 96.17 100.44 100.86
17000 93.42 87.69 93.59 95.22 94.66 101.99 101.46
16000 91.24 88.58 92.18 100.01 99.75 101.27 101.7
15000 90.6 89.53 91.44 101.04 100.67 101.14 101.13
14000 90.98 90.35 90.67 102.11 101.63 101.03 101.93
13200 90.49 91.23 90.81 103.02 101.86 100.51 100.74
12500 90.05 92.06 91.37 102.69 102.22 100.44 100.86
11800 89.83 92.91 90.47 102.67 101.24 101.99 101.46
11200 91.19 92.54 89.54 100.01 100.75 102.27 102.7
10600 93.28 92.04 93.22 101.04 100.67 102.14 102.13
10000 91.82 92.76 103.47 102.11 102.63 102.03 102.93
9500 87.12 93.20 104.19 103.02 103.86 100.6 101.63
9000 95.3 94.51 103.79 102.69 103.22 100.75 101.88
8500 103.57 93.89 104.53 102.67 103.24 102.28 102.35
8000 105.7 94.68 103.86 102.13 101.86 102.59 102.98
7500 105.62 94.73 105.01 101.91 101.99 102.55 103.26
7100 105.2 100.64 104.27 102.3 102.52 102.42 103.22
6700 104.91 101 103.13 102.62 102.68 102.36 103.06
6300 105.03 101.33 103.78 102.56 102.53 102.23 102.9
6000 104.78 101.69 102.54 102.51 102.42 101.05 102.63
5600 104.31 102.01 102.06 102.32 102.29 100.93 102.44
5300 103.92 102.22 101.87 102.19 102.15 100.77 102.21
5000 103.48 102.3 101.44 101.96 101.93 100.66 102.01
4750 103.13 102.35 101.29 101.83 101.76 100.58 101.94
4500 102.77 102.37 100.94 101.65 101.56 100.42 101.85
4250 102.44 102.38 100.53 101.51 101.4 100.41 101.74
4000 102.17 102.34 101.04 101.45 101.34 100.57 101.7
As seen from the above table, the double faced adhesive tape that the present embodiment provides can significantly improve the high-frequency cut-off frequency of vibrating diaphragm so that shake Film can cover ultra wide frequency, meet the needs of high definition voice, have wide market application foreground.
The embodiment of the present invention also provides a kind of vibrating diaphragm 1：
Shown in 1~Fig. 4 of reference picture, include using basic unit 1A, vibrating diaphragm made of composite from up-down structure division vibrating diaphragm 1 1 is divided into top dome 11, ring 12 and outstanding side 13 from middle part to edge, and outstanding side 13 is used to be located in frame vibrating diaphragm 1 being fixed on to raise On sound device.Top dome 11, ring 12 and outstanding side 13 all include basic unit 1A parts, and being also sticked at top dome 11 has middle patch 1B.
Composite includes glue-line 1A-2 and is located at the first restraint layer 1A-1 on the glue-line 1A-2 two sides.First constraint Layer 1A-1 is made of polyether-ether-ketone or polyetherimide material, has preferable hardness and rigidity.Glue-line 1A-2 is using above-mentioned Double faced adhesive tape, double faced adhesive tape has good viscosity and the frivolous structure sheaf of rubber like can be formed after binding, have preferable Elasticity.Composite has the characteristics of rigidity is good made from double faced adhesive tape and the first restraint layer 1A-1, can effectively widen loudspeaker High frequency frequency range.Simultaneously also with preferable toughness, there is preferable low frequency bandwidth.
In embodiment, low-limit frequency increases with the increase of the thickness of vibrating diaphragm 1, while also with the weight increase of vibrating diaphragm 1 And increase, the first restraint layer 1A-1 thickness is 5.0um between 20um, can effectively dragging down the limitation of low-limit frequency so that Low-limit frequency is not higher than 60Hz.
In embodiment, vibrating diaphragm 1 is symmetrical structure, and the middle of vibrating diaphragm 1 is top dome 11, and the ring of ring 12 is located at the four of top dome 11 Week, ring 12 are made of frivolous and flexible composite so that ring 12, which has efficiently and quickly absorbs itself, to shake The characteristics of dynamic, the high-frequency upper limit can be effectively improved.
In embodiment, top dome 11 is provided with corrugated part 112, and corrugated part 112 is located at middle patch 1B both sides.It is raised by setting Ring 12, corrugated part 112, it is possible to increase the toughness of vibrating diaphragm 1, improve vibrating diaphragm 1 life-span.And add the area of vibrating diaphragm 1, energy Enough broadbands.
In embodiment, middle patch 1B includes the second restraint layer 1B-2 and the 3rd restraint layer 1B-1, and middle patch 1B improves top dome 11 Rigidity, effectively widen the frequency range of high frequency.Middle patch 1B is combined into using two restraint layers, is easy to set sound-absorbing structure, low to widening Frequent width plays an important role.
In embodiment, the second restraint layer 1B-2 is located on basic unit 1A, and covered with the second restraint layer 1B-2 one side Three restraint layer 1B-1, have die cavity between the 3rd restraint layer 1B-1 and the second restraint layer 1B-2.Sound-absorbing particle is filled with die cavity 1B-3, lowest resonance frequency can be effectively reduced, improve low frequency frequency response, and spread bandwidth.Sound-absorbing particle 1B-3 is using activity Charcoal ball, there is the advantages of sound-absorbing effect is good and in light weight, suitable for vibrating diaphragm 1.And constrained in the 3rd restraint layer 1B-1 and second Cushion is respectively coated on layer 1B-2 opposite faces, improves the service life of activated carbon ball.
In embodiment, the 3rd restraint layer 1B-1 is made of foamed aluminium, and foamed aluminium has through hole so that loudspeaker applications in When in electronic equipment, top dome 11 connects to form pressure release by the 3rd restraint layer 1B-1 with the rear operatic tunes, enables to sound-absorbing particle 1B- 3 effect is more preferably obvious, effectively reduces resonant frequency, improves LF-response.
In embodiment, the second restraint layer 1B-2 is bent to form undulated layer, and the sound-absorbing particle 1B-3 is in wave trough, sound-absorbing The side wall frequent impact of particle 1B-3 and waveform groove, friction, improve sound-absorbing effect.Second restraint layer 1B-2 ripple is wide to be less than ring 12 ripple is wide so that top dome 11 has than 12 more preferable rigidity of ring, is applicable low frequency characteristic.
In embodiment, some thin through holes are offered on the second restraint layer 1B-2 wave trough inwall, coordinate the 3rd restraint layer 1B- 1 uses, and is connected with the rear operatic tunes.The diameter of the thin through hole is less than the diameter of the sound-absorbing particle 1B-3, avoids sound-absorbing particle 1B- 3 are dropped, it is preferred that thin through hole is located at the second restraint layer 1B-2 crest.
Embodiments described above is part of the embodiment of the present invention, rather than whole embodiments.The reality of the present invention The detailed description for applying example is not intended to limit the scope of claimed invention, but is merely representative of the selected implementation of the present invention Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made Every other embodiment, belongs to the scope of protection of the invention.

Claims (10)

  1. A kind of 1. double faced adhesive tape for the ultra-wideband diaphragm of loudspeaker, it is characterised in that
    The raw material of the double faced adhesive tape includes monomer, tackifying resin, organic solvent, initiator and crosslinking agent, in parts by weight, The monomer includes 50-60 parts Isooctyl acrylate monomer, 10-15 parts butyl acrylate, 2-5 parts Isobutyl methacrylate and 2- 6 parts of acrylic acid, the tackifying resin are 22-28 parts, and the organic solvent is 80-90 parts, and the initiator is 0.1-0.5 Part, the crosslinking agent is 0.05-0.4 parts.
  2. 2. the double faced adhesive tape according to claim 1 for the ultra-wideband diaphragm of loudspeaker, it is characterised in that according to parts by weight Meter, the Isooctyl acrylate monomer is 53-54 parts, and the butyl acrylate is 12-13 parts, and the Isobutyl methacrylate is 4- 5 parts, the acrylic acid is 3-4 parts, the tackifying resin is 25-26 parts, the initiator is 0.3-0.5 parts, the crosslinking agent For 0.1-0.2 parts.
  3. 3. the double faced adhesive tape according to claim 1 for the ultra-wideband diaphragm of loudspeaker, it is characterised in that the tackifying resin For modified rosin resin or terpene resin.
  4. 4. the double faced adhesive tape according to claim 1 for the ultra-wideband diaphragm of loudspeaker, it is characterised in that the crosslinking agent is Praseodynium aluminium, the initiator are benzoyl peroxide or azodiisobutyronitrile.
  5. 5. the double faced adhesive tape according to claim 1 for the ultra-wideband diaphragm of loudspeaker, it is characterised in that the double faced adhesive tape Raw material also includes modified component, and in parts by weight, the modified component includes the modified carbon nano-tube of 0.1-0.5 parts.
  6. 6. the double faced adhesive tape according to claim 5 for the ultra-wideband diaphragm of loudspeaker, it is characterised in that the carbon modified is received The method of modifying of mitron is：CNT is immersed in the alkaline aqueous solution containing dopamine and reacted.
  7. 7. the double faced adhesive tape according to claim 6 for the ultra-wideband diaphragm of loudspeaker, it is characterised in that the alkalescence is water-soluble The pH value of liquid is 7.5~12, and the reaction time is 3~7h.
  8. A kind of 8. preparation method of the double faced adhesive tape as claimed in claim 1 for the ultra-wideband diaphragm of loudspeaker, it is characterised in that Comprise the following steps：
    S1, take the 1/5-2/5 monomer, 1/5-2/5 the initiator and 1/5-2/5 organic solvent stirring, rise Temperature is reacted to obtain the first reactant to 75 DEG C -80 DEG C；
    S2, is added dropwise mixed liquor in first reactant, and the mixed liquor includes the remaining monomer, 1/5-2/5 has The initiator of solvent and 1/5-2/5, the remaining initiator is added after completion of dropwise addition, be incubated 1.5-3h, obtain second Reactant；
    S3, the tackifying resin is dissolved with the remaining organic solvent, second reactant is then added to, adds after mixing Enter the crosslinking agent, the double faced adhesive tape is obtained after being stirred.
  9. 9. preparation method according to claim 8, it is characterised in that in step S1, it is additionally added catalyst and is reacted, institute Stating catalyst includes rare earth oxide and Na-X molecular sieves.
  10. 10. preparation method according to claim 9, it is characterised in that in step S2, the mixed liquor also includes carbon modified Nanotube and the catalyst.
CN201711230841.1A 2017-11-29 2017-11-29 A kind of double-sided adhesive and preparation method thereof for the ultra-wideband diaphragm of loudspeaker Active CN107892889B (en)

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CN109714686A (en) * 2018-12-24 2019-05-03 厦门冠音泰科技有限公司 A kind of superlinearity loudspeaker
CN113423045A (en) * 2021-06-09 2021-09-21 歌尔股份有限公司 Loudspeaker diaphragm, loudspeaker diaphragm preparation method and sound production device
CN114921202A (en) * 2022-04-28 2022-08-19 深圳市通泰盈科技股份有限公司 High-temperature-resistant acrylic pressure-sensitive adhesive, preparation method thereof, pressure-sensitive adhesive tape and preparation method thereof
CN117534900A (en) * 2024-01-09 2024-02-09 瑞声光电科技(常州)有限公司 Rubber sound membrane, sound production device and application thereof

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CN106634632A (en) * 2016-11-18 2017-05-10 烟台德邦科技有限公司 Preparation method of UV (Ultraviolet) moisture double cured pressure sensitive adhesive

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CN101899274A (en) * 2009-12-16 2010-12-01 肖方一 Acrylate waterproof adhesive and preparation method and application thereof
CN102391799A (en) * 2011-09-05 2012-03-28 青岛海信电器股份有限公司 Substrate-free pressure-sensitive acrylic thermal conductive adhesive, preparation method and application thereof
WO2016032924A1 (en) * 2014-08-25 2016-03-03 Henkel IP & Holding GmbH Acrylic polymers and their use in transdermal drug delivery
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CN109714686A (en) * 2018-12-24 2019-05-03 厦门冠音泰科技有限公司 A kind of superlinearity loudspeaker
CN113423045A (en) * 2021-06-09 2021-09-21 歌尔股份有限公司 Loudspeaker diaphragm, loudspeaker diaphragm preparation method and sound production device
CN113423045B (en) * 2021-06-09 2022-09-20 歌尔股份有限公司 Vibrating diaphragm for loudspeaker, preparation method of vibrating diaphragm for loudspeaker and sound production device
CN114921202A (en) * 2022-04-28 2022-08-19 深圳市通泰盈科技股份有限公司 High-temperature-resistant acrylic pressure-sensitive adhesive, preparation method thereof, pressure-sensitive adhesive tape and preparation method thereof
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CN117534900A (en) * 2024-01-09 2024-02-09 瑞声光电科技(常州)有限公司 Rubber sound membrane, sound production device and application thereof
CN117534900B (en) * 2024-01-09 2024-04-09 瑞声光电科技(常州)有限公司 Rubber sound membrane, sound production device and application thereof

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