CN107892889B - A kind of double-sided adhesive and preparation method thereof for the ultra-wideband diaphragm of loudspeaker - Google Patents
A kind of double-sided adhesive and preparation method thereof for the ultra-wideband diaphragm of loudspeaker Download PDFInfo
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- CN107892889B CN107892889B CN201711230841.1A CN201711230841A CN107892889B CN 107892889 B CN107892889 B CN 107892889B CN 201711230841 A CN201711230841 A CN 201711230841A CN 107892889 B CN107892889 B CN 107892889B
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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
Abstract
The present invention provides a kind of double-sided adhesive and preparation method thereof for the ultra-wideband diaphragm of loudspeaker, is related to mucilage materials technical field.The raw material of this double-sided adhesive 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, 2-5 parts of Isobutyl methacrylates and 2-6 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.Furthermore the invention further relates to the preparation methods of this double-sided adhesive.By selecting suitable comonomer, function monomer and tackifying resin, polymerization reaction obtains double-sided adhesive under the action of initiator and crosslinking agent,, adhesive property strong, high temperature resistant, spreading resistance high with intensity etc., when being especially applied in the vibrating diaphragm of loudspeaker, the ultra-wide yupin effect that can guarantee loudspeaker, meets the needs of high definition voice.
Description
Technical field
The present invention relates to adhesives technical fields, and in particular to a kind of for the two-sided of the ultra-wideband diaphragm of loudspeaker
Glue.
Background technique
With advances in technology with 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 higher and higher.Electro-acoustic element is required towards small-sized, highly sensitive, high tone quality, high-fidelity, ultra-wideband development.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
It is transformed, to obtain the electro-acoustic product of loud sound quality.But the transformation of diaphragm structure and material is complicated, at high cost, changes
The effect of kind voice quality is unobvious.
Inventor the study found that electro-acoustic element great influence of the voice quality 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, is set in ring portion week
In top dome portion, outstanding edge is located at the edge in ring portion, is fixed on bracket.Vibrating diaphragm is required to have in high definition voice call process
High sensitivity, high power, high tone quality feature, and then realize covering broadband, thus it requires the top dome portion of vibrating diaphragm needs
Enough rigidity are to reinforce bandwidth.Some researches show that the materials such as polyester, polyimide, polyether-ether-ketone are compound by adhesive
Composite material is formed together for making vibrating diaphragm, be can satisfy the rigid demand in vibrating diaphragm top dome portion, is able to ascend electro-acoustic element
Performance.But in use, adhesive, which is easy to be heated, declines strength and stiffness, influences adhesive property.In addition, glue
Stick is easy to produce polarization when big displacement vibration occurs for vibrating diaphragm, and product stability is deteriorated, total harmonic distortion, the cut-off of high frequency
Frequency reduces, and is unable to satisfy the demand to high definition voice.
Summary of the invention
The purpose of the present invention is to provide a kind of double-sided adhesive for the ultra-wideband diaphragm of loudspeaker, this double-sided adhesive has bonding
Performance is strong, has both the characteristics such as intensity and vibration absorbing performance, fine heat radiation property, realizes that diaphragm structure covers ultra-wide band loudspeaker.
Another object of the present invention is to provide a kind of preparation method of double-sided adhesive for the ultra-wideband diaphragm of loudspeaker, this
Preparation method is simple, is easily achieved, and is suitable for industrialization large-scale production.
The present invention solves its technical problem and adopts the following technical solutions to realize.
The present invention proposes that a kind of double-sided adhesive for the ultra-wideband diaphragm of loudspeaker, the raw material of this double-sided adhesive include monomer, increase
Viscosity resin, organic solvent, initiator and crosslinking agent, in parts by weight, monomer include 50-60 parts of Isooctyl acrylate monomers, 10-
15 parts of butyl acrylates, 2-5 parts of Isobutyl methacrylates and 2-6 parts of acrylic acid, 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-sided adhesive for the ultra-wideband diaphragm of loudspeaker comprising following steps:
S1 takes the organic solvent of the monomer of 1/5-2/5, the initiator of 1/5-2/5 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 the initiator of 1/5-2/5, remaining initiator is added after completion of dropwise addition, keeps the temperature 1.5-3h, obtains the second reactant；
S3 dissolves the tackifying resin with remaining organic solvent, is then added to the second reactant, is added and hands over after mixing
Join agent, the double-sided adhesive is obtained after being stirred.
The beneficial effect of the double-sided adhesive 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 polymerization reaction, 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 between resin, bonding force is more preferable, and further increase the cohesive force of product, heat resistance etc..In addition, initiator and
The use of crosslinking agent, and during the preparation process, using stage feeding polymerization, make the performance of product big by specific treatment process
Big raising, such as mechanical performance, heat resistance, adhesive property, vibration absorbing performance are greatly improved.Obtained double-sided adhesive is answered
The composite material of vibrating diaphragm is prepared for loudspeaker, effectively each component can not only be bonded, and enhances the support of composite material
Intensity and rigidity, additionally it is possible to the performances such as the absorbing of composite material are further strengthened, realize that diaphragm structure covers ultra-wide band loudspeaker,
Meets the needs of high definition voice communication.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of embodiment of the present invention
Attached drawing be briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not to be seen as
It is the restriction to range, it for those of ordinary skill in the art, without creative efforts, can be with root
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is the perspective view of vibrating diaphragm in loudspeaker of the embodiment of the present invention；
Fig. 2 is cross-sectional view of the vibrating diaphragm shown in FIG. 1 along the direction C-C；
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 diaphragm；1A- base；It is pasted in 1B-；11- top dome；12- ring；13- hangs side；112- corrugated part；1A1-
One restraint layer；1A2- glue-line；1B1- third restraint layer；The second restraint layer of 1B2-；1B3- sound-absorbing particle.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Double-sided adhesive 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-sided adhesive for the ultra-wideband diaphragm of loudspeaker provided in an embodiment of the present invention, the raw material of this double-sided adhesive include
Monomer, tackifying resin, organic solvent, initiator and crosslinking agent, in parts by weight, monomer include that 50-60 parts of acrylic acid are different
Monooctyl ester, 10-15 part butyl acrylate, 2-5 parts of Isobutyl methacrylates and 2-6 parts of acrylic acid, 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 part, and Isobutyl methacrylate is 4-5 parts, acrylic acid is 3-4 parts, tackifying resin is 25-26 parts,
Initiator is 0.3-0.5 parts, and crosslinking agent is 0.1-0.2 parts.By monomer, resin, the initiator, crosslinking agent under above-mentioned specific proportion
It polymerize obtained double-sided adhesive function admirable, when adhesive thickness is 5 microns, adhesion strength reaches 1.5kg/in or more.And it 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.Into one
Step is preferably modified rosin resin.Modified rosin resin can use commercial product, can also make by oneself.Such as fumaric acid is selected to change
Property rosin resin under the protection of N2, risen the preparation method comprises the following steps: mixing the fumaric acid of 50 parts by weight and the rosin of 15 parts by weight
Then temperature is warming up to 190~210 DEG C to 150~170 DEG C of 2~3h of reaction again, the pentaerythrite and 0.0015 of 8 parts by weight is added
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, in conjunction 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.When using praseodynium aluminium as crosslinking agent, the performance of product is greatly improved, 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 fine and close reticular structure, on the basis of keeping product that there is excellent in toughness, improve product
Intensity.
Further, in preferred embodiments of the present invention, the raw material of double-sided adhesive further includes modified component, according to parts by weight
Number meter, modified component includes 0.1-0.5 parts of modified carbon nano-tube.Carbon nanotubes are light, have special mechanics, electricity and
Chemical property.Especially carbon nanotube itself has biggish damping value, and light weight, can be Nian Jie with compound material seamless.
Modified carbon nano-tube is added, can effectively enhance the intensity of product, meanwhile, carbon nanotube 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 increase
The shock attenuation result of composite inner.In addition, the heat-conducting effect of carbon nanotube enables to product to have excellent heat dissipation performance,
It avoids 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 are as follows: soak carbon nanotube
Enter and is 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 be 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
The surface property for improving carbon nanotube, enables to the surface property of carbon nanotube to be improved, to uniformly divide in the product
It dissipates, and forms good combination with other compositions.
Further, in preferred embodiments of the present invention, organic solvent selects toluene, dimethylbenzene, one in durene
Kind is a variety of.
The present invention proposes a kind of preparation method of double-sided adhesive for the ultra-wideband diaphragm of loudspeaker comprising following steps:
S1 takes the organic solvent of the monomer of 1/5-2/5, the initiator of 1/5-2/5 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 the initiator of 1/5-2/5, remaining initiator is added after completion of dropwise addition, keeps the temperature 1.5-3h, obtains the second reactant；
S3 dissolves tackifying resin with remaining organic solvent, is then added to the second reactant, crosslinking is added after mixing
Agent obtains double-sided adhesive after being stirred.
Segmentation reaction is carried out by S1 step and S2 step, guarantees that each component can sufficiently be reacted, forms quality
The product of stable homogeneous, polymer form fine and close network structure internal, further enhance intensity.Preferably, in S1 step,
Reaction time is 0.5~1h.
Further, it in preferred embodiments of the present invention, in step S1, is additionally added catalyst and is reacted, catalyst
Including rare earth oxide and Na-X molecular sieve.Further, in step S1, the dosage of catalyst is the 0.03 of all monomer total amounts
~0.06%, catalysis reaction efficiency is high, and product quality is excellent.Preferably, catalyst is the Y that mass ratio is 1:1:0.32O3、
Nd2O3With Na-X molecular sieve.Using the catalyst, the product for enabling to product rapid polymerization, and obtaining has stronger carrying
Power.
Further, in preferred embodiments of the present invention, in step S2, mixed liquor further includes modified carbon nano-tube and urges
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 being added dropwise, stirring speed
Degree is 80~100rpm/min.It being slowly added dropwise, is stirred continuously simultaneously, effective dispersion products guarantee the homogeneity of polymerization reaction, into
And the performance of product is got a promotion.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
A kind of double-sided adhesive for the ultra-wideband diaphragm of loudspeaker provided in this embodiment, is prepared into according to following steps
It arrives:
(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, take 1/3 monomer, 1/3 initiator and 1/3 organic solvent stirring, be warming up to 75 DEG C and reacted to obtain
First reactant；
S2, is added dropwise mixed liquor in the first reactant, and mixed liquor includes the organic solvent and 1/3 of remaining monomer, 1/3
Initiator, be added remaining initiator after completion of dropwise addition, keep the temperature 1.5h, obtain the second reactant；
S3 dissolves tackifying resin with remaining organic solvent, is then added to the second reactant, crosslinking is added after mixing
Agent obtains double-sided adhesive after being stirred.
Embodiment 2
A kind of double-sided adhesive for the ultra-wideband diaphragm of loudspeaker provided in this embodiment, is prepared into according to following steps
It arrives:
(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, take 1/3 monomer, 1/3 initiator and 1/3 organic solvent stirring, be warming up to 80 DEG C and reacted to obtain
First reactant；
S2, is added dropwise mixed liquor in the first reactant, and mixed liquor includes the organic solvent and 1/3 of remaining monomer, 1/3
Initiator, be added remaining initiator after completion of dropwise addition, keep the temperature 2h, obtain the second reactant；
S3 dissolves tackifying resin with remaining organic solvent, is then added to the second reactant, crosslinking is added after mixing
Agent obtains double-sided adhesive after being stirred.
Embodiment 3
A kind of double-sided adhesive for the ultra-wideband diaphragm of loudspeaker provided in this embodiment, is prepared into according to following steps
It arrives:
(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 the Y of 1:1:0.32O3、Nd2O3With 0.08 part of Na-X molecular sieve.
S1 takes 1/3 monomer, 1/3 initiator, 1/3 organic solvent and the stirring of 1/2 catalyst, is warming up to 80 DEG C
It is reacted to obtain the first reactant；
S2, is added dropwise mixed liquor in the first reactant, mixed liquor include remaining monomer, 1/3 organic solvent, 1/3
Initiator, modified carbon nano-tube and 1/2 catalyst, be added remaining initiator after completion of dropwise addition, keep the temperature 2h, it is anti-to obtain second
Answer object；
S3 dissolves tackifying resin with remaining organic solvent, is then added to the second reactant, crosslinking is added after mixing
Agent obtains double-sided adhesive after being stirred.
Embodiment 4
A kind of double-sided adhesive for the ultra-wideband diaphragm of loudspeaker provided in this embodiment, is prepared into according to following steps
It arrives:
(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 the Nd of 1:0.42O3With 0.06 part of Na-X molecular sieve.
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, mixed liquor include remaining monomer, 1/3 organic solvent, 1/3
Initiator, 1/2 catalyst and carbon nanotube, be added remaining initiator after completion of dropwise addition, keep the temperature 1.5-3h, it is anti-to obtain second
Answer object；
S3 dissolves tackifying resin with remaining organic solvent, is then added to the second reactant, crosslinking is added after mixing
Agent obtains double-sided adhesive after being stirred.
Comparative example 1
A kind of double-sided adhesive for the diaphragm of loudspeaker that this comparative example provides, the preparation method substantially phase with embodiment 1
Together, the difference is that, the formula of raw material are as follows:
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-sided adhesive for the diaphragm of loudspeaker that this comparative example provides, the preparation method substantially phase with embodiment 1
Together, the difference is that, the formula of raw material are as follows:
Monomer: 70 parts of Isooctyl acrylate monomer, 5 parts of butyl acrylate, 1 part of Isobutyl methacrylate and 1 part of 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-sided adhesive for the diaphragm of loudspeaker that this comparative example provides, it is identical as the formula of embodiment 1, difference
It is in and is prepared in it according to following steps:
S1 takes above-mentioned monomer to be added in organic solvent, and stirring is warming up to 75 DEG C and is reacted to obtain the first reactant；
Initiator is added in S2 in the first reactant, reacts 3h, obtains the second reactant；
Tackifying resin is added to the second reactant, crosslinking agent is added after mixing, obtains double-sided adhesive after being stirred by S3.
Test example
Double-sided adhesive made from Examples 1 to 4 and comparative example 1~3 is applied to vibrating diaphragm, which uses composite material,
Composite material includes layers of two-sided and the polyether-ether-ketone layer for being located at layers of two-sided two sides.Layers of two-sided using Examples 1 to 4 with
And the double-sided adhesive that comparative example 1~3 provides.
The high-frequency cut-off frequency of above-mentioned sample is tested, the results are shown in Table 1.
1 vibrating diaphragm high-frequency cut-off frequency test table of table
| 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, double-sided adhesive provided in this embodiment can significantly improve the high-frequency cut-off frequency of vibrating diaphragm, so that vibration
Film can cover ultra wide frequency, meet the needs of high definition voice, have a vast market application prospect.
The embodiment of the present invention also provides a kind of vibrating diaphragm 1:
Shown in referring to Fig.1~Fig. 4, dividing vibrating diaphragm 1 from up-down structure includes using base 1A made of composite material, vibrating diaphragm
1 is divided into top dome 11, ring 12 and outstanding side 13 from middle part to edge, and outstanding side 13 is raised for setting on the rack to be fixed on vibrating diaphragm 1
On sound device.Top dome 11, ring 12 and outstanding side 13 all include the part base 1A, and being also sticked at top dome 11 has middle patch 1B.
Composite material includes glue-line 1A-2 and the first restraint layer 1A-1 for being located at the two sides the glue-line 1A-2.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-sided adhesive, double-sided adhesive is capable of forming the frivolous structure sheaf of rubber like after having good viscosity and bonding, has preferable
Elasticity.Composite material made from double-sided adhesive and the first restraint layer 1A-1 has the characteristics that rigidity is good, can effectively widen loudspeaker
High frequency bandwidth.Also there is preferable low frequency bandwidth with preferable toughness simultaneously.
In embodiment, low-limit frequency increases with the increase of 1 thickness of vibrating diaphragm, while increasing also with the weight of vibrating diaphragm 1
And increase, the first restraint layer 1A-1 with a thickness of 5.0um between 20um, capable of 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 12 ring of ring is located at the four of top dome 11
Week, ring 12 are made of frivolous and flexible composite material, so that ring 12 has efficiently and quickly absorbs itself vibration
Dynamic feature can effectively improve the high-frequency upper limit.
In embodiment, top dome 11 is equipped with corrugated part 112, and corrugated part 112 is located at the two sides of middle patch 1B.Pass through setting protrusion
Ring 12, corrugated part 112, can be improved the toughness of vibrating diaphragm 1, improve the service life of vibrating diaphragm 1.And increase the area of vibrating diaphragm 1, energy
Enough broadbands.
In embodiment, middle patch 1B includes that the second restraint layer 1B-2 and third restraint layer 1B-1, middle patch 1B improve top dome 11
Rigidity, effectively widens the bandwidth of high frequency.Middle patch 1B is combined into using two restraint layers, low to widening convenient for setting sound-absorbing structure
Frequent width plays an important role.
In embodiment, the second restraint layer 1B-2 is located on base 1A, and is covered in the one side of the second restraint layer 1B-2
There is type chamber between three restraint layer 1B-1, third restraint layer 1B-1 and the second restraint layer 1B-2.Type is intracavitary to be filled with sound-absorbing particle
1B-3 can be effectively reduced lowest resonance frequency, improve low frequency frequency response, and spread bandwidth.Sound-absorbing particle 1B-3 is using activity
Charcoal ball has the advantages that sound-absorbing effect is good and light-weight, suitable for vibrating diaphragm 1.And it is constrained in third restraint layer 1B-1 and second
Buffer layer is respectively coated on layer 1B-2 opposite face, improves the service life of active carbon ball.
In embodiment, third restraint layer 1B-1 is made of foamed aluminium, foamed aluminium have through-hole so that loudspeaker applications in
When in electronic equipment, top dome 11 is connected to form pressure release by third restraint layer 1B-1 with the rear operatic tunes, enables to sound-absorbing particle 1B-
3 effect is more preferably obvious, and resonant frequency is effectively reduced, and improves low frequency response.
In embodiment, the second restraint layer 1B-2 is bent to form undulated layer, and the sound-absorbing particle 1B-3 is set in wave trough, sound-absorbing
The side wall frequent impact of particle 1B-3 and waveform groove, friction, improve sound-absorbing effect.The wave of second restraint layer 1B-2 is wide to be less than ring
12 wave is wide, so that top dome 11 has than the better rigidity of ring 12, is applicable in low frequency characteristic.
In embodiment, several thin through-holes are offered on the wave trough inner wall of the second restraint layer 1B-2, cooperate third restraint layer 1B-
1 uses, and is connected to 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 fall, it is preferred that thin through-hole is located at the wave crest of the second restraint layer 1B-2.
Embodiments described above is a part of the embodiment of the present invention, instead of all the embodiments.Reality of the invention
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
Claims (10)
1. a kind of double-sided adhesive for the ultra-wideband diaphragm of loudspeaker, which is characterized in that
The raw material of the double-sided adhesive includes monomer, tackifying resin, organic solvent, initiator and crosslinking agent, in parts by weight,
The monomer includes 50-60 parts of Isooctyl acrylate monomers, 10-15 parts of butyl acrylates, 2-5 parts of Isobutyl methacrylates 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；
It is prepared according to following steps:
S1 takes the organic solvent of the monomer of 1/5-2/5, the initiator of 1/5-2/5 and 1/5-2/5 to stir, and rises
Temperature is reacted to obtain the first reactant to 75 DEG C -80 DEG C；
S2, be added dropwise mixed liquor in first reactant, and the mixed liquor includes that the remaining monomer, 1/5-2/5 have
The remaining initiator is added in the initiator of solvent and 1/5-2/5 after completion of dropwise addition, keep the temperature 1.5-3h, obtain second
Reactant；
S3 dissolves the tackifying resin with the remaining organic solvent, is then added to second reactant, adds after mixing
Enter the crosslinking agent, the double-sided adhesive is obtained after being stirred.
2. the double-sided adhesive according to claim 1 for the ultra-wideband diaphragm of loudspeaker, which is characterized in that according to parts by weight
Meter, the Isooctyl acrylate monomer are 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
It is 0.1-0.2 parts.
3. the double-sided adhesive according to claim 1 for the ultra-wideband diaphragm of loudspeaker, which is characterized in that the tackifying resin
For modified rosin resin or terpene resin.
4. the double-sided adhesive according to claim 1 for the ultra-wideband diaphragm of loudspeaker, which is characterized in that the crosslinking agent is
Praseodynium aluminium, the initiator are benzoyl peroxide or azodiisobutyronitrile.
5. the double-sided adhesive according to claim 1 for the ultra-wideband diaphragm of loudspeaker, which is characterized in that the double-sided adhesive
Raw material further includes modified component, and in parts by weight, the modified component includes 0.1-0.5 parts of modified carbon nano-tube.
6. the double-sided adhesive according to claim 5 for the ultra-wideband diaphragm of loudspeaker, which is characterized in that the carbon modified is received
The method of modifying of mitron are as follows: carbon nanotube is immersed in the alkaline aqueous solution containing dopamine and is reacted.
7. the double-sided adhesive according to claim 6 for the ultra-wideband diaphragm of loudspeaker, which is characterized in that the alkalinity is water-soluble
The pH value of liquid is 7.5~12, and the reaction time is 3~7h.
8. a kind of preparation method for the double-sided adhesive of the ultra-wideband diaphragm of loudspeaker as described in claim 1, which is characterized in that
The following steps are included:
S1 takes the organic solvent of the monomer of 1/5-2/5, the initiator of 1/5-2/5 and 1/5-2/5 to stir, and rises
Temperature is reacted to obtain the first reactant to 75 DEG C -80 DEG C；
S2, be added dropwise mixed liquor in first reactant, and the mixed liquor includes that the remaining monomer, 1/5-2/5 have
The remaining initiator is added in the initiator of solvent and 1/5-2/5 after completion of dropwise addition, keep the temperature 1.5-3h, obtain second
Reactant；
S3 dissolves the tackifying resin with the remaining organic solvent, is then added to second reactant, adds after mixing
Enter the crosslinking agent, the double-sided adhesive is obtained after being stirred.
9. preparation method according to claim 8, which is characterized in that in step S1, it is additionally added catalyst and is reacted, institute
Stating catalyst includes rare earth oxide and Na-X molecular sieve.
10. preparation method according to claim 9, which is characterized in that in step S2, the mixed liquor further includes carbon modified
Nanotube and the catalyst.
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| CN109714686B (en) * | 2018-12-24 | 2020-07-17 | 湖北冠音泰科技有限公司 | Super linear loudspeaker |
| 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 |
| CN114921202B (en) * | 2022-04-28 | 2023-09-22 | 深圳市通泰盈科技股份有限公司 | High-temperature-resistant acrylic pressure-sensitive adhesive and preparation method thereof, pressure-sensitive adhesive tape and preparation method 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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