CN111961414A - Preparation method of substrate-free anisotropic double-sided adhesive tape - Google Patents
Preparation method of substrate-free anisotropic double-sided adhesive tape Download PDFInfo
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- CN111961414A CN111961414A CN202010806357.4A CN202010806357A CN111961414A CN 111961414 A CN111961414 A CN 111961414A CN 202010806357 A CN202010806357 A CN 202010806357A CN 111961414 A CN111961414 A CN 111961414A
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/10—Adhesives in the form of films or foils without carriers
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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
- 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
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- 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
- C09J133/066—Copolymers with monomers not covered by C09J133/06 containing -OH groups
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- C09J143/00—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 containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Adhesives based on derivatives of such polymers
- C09J143/04—Homopolymers or copolymers of monomers containing silicon
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J151/006—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to block copolymers containing at least one sequence of polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J151/04—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to rubbers
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C09J2433/00—Presence of (meth)acrylic polymer
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- C09J2451/00—Presence of graft polymer
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- C09J2493/00—Presence of natural resin
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Abstract
The invention relates to the technical field related to production and processing of double-sided adhesive tapes, and particularly discloses a preparation method of a substrate-free anisotropic double-sided adhesive tape, which comprises the following steps: step 1, a stirrer, a reflux condenser and a constant pressure dropping funnel are arranged on a 1000mL four-neck flask, a water bath kettle is opened, the temperature is raised to 80 ℃, then mixing various monomers, an initiator, an additive and a solvent according to a certain proportion, adding the uniformly mixed solution into a constant-pressure dropping funnel, the preparation method of the substrate-free opposite-nature double-sided adhesive tape has the advantages that the substrate-free opposite-nature double-sided adhesive tape is prepared by the acrylic acid/acrylic acid modified rubber which is thinly coated, the temperature application range is wide (-40-160 ℃), the high and low temperature resistance, the high humidity resistance, the yellowing resistance, the flexibility and the mechanical property are good, the coating can lead the vibrating diaphragm to be light and thin enough without losing performance, effectively improves the frequency response and harmonic distortion performance, the good mechanical property of the vibrating diaphragm can protect the vibrating diaphragm from being damaged by long-term vibration in a high-frequency state, and the good tone quality is kept.
Description
Technical Field
The invention relates to the technical field related to production and processing of double-sided adhesive tapes, and particularly discloses a preparation method of a substrate-free anisotropic double-sided adhesive tape.
Background
The double-sided adhesive tape is a roll-shaped adhesive tape which is prepared by taking paper, cloth and a plastic film as base materials and uniformly coating an elastomer type pressure-sensitive adhesive or a resin type pressure-sensitive adhesive on the base materials, and Chinese patent discloses a preparation method of a silica gel diaphragm adhesive tape and the silica gel diaphragm adhesive tape (No. CN107652911A), wherein 50-70 parts of methyl vinyl silicone rubber, 10-20 parts of fumed silica, 1-5 parts of an additive and 1-5 parts of a cross-linking agent are mixed and coated to prepare the double-sided adhesive tape without the base materials, and finally the silica gel diaphragm adhesive tape is formed. The main purpose is as follows: the production efficiency of the vibrating diaphragm adhesive tape is improved by a coating process method; improve thickness and improve vibrating diaphragm thickness singleness, the poor problem of vibrating diaphragm fidelity effect under the big volume, but mechanical properties such as silicon rubber material tensile strength and tear strength are relatively poor, and thickness can't be attenuate and the cost is higher for the vibrating diaphragm is damaged by deformation easily under some conditions, and the signal distortion, and the vibrating diaphragm fidelity effect is poor under the big volume under the too thick condition of glued membrane
Disclosure of Invention
In view of the shortcomings of the prior art, the present invention is directed to a method for preparing an opposite-nature double-sided adhesive tape without a substrate, so as to solve the problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a preparation method of a non-substrate opposite-nature double-sided adhesive tape comprises the following steps:
step 1: putting a stirrer, a reflux condenser and a constant-pressure dropping funnel on a 1000mL four-neck flask, opening a water bath kettle, raising the temperature to 80 ℃, then mixing various monomers, an initiator, an additive and a solvent in a certain proportion, then adding the uniformly mixed solution into the constant-pressure dropping funnel, adding 1/3 of the mixed solution as a prepolymer from the constant-pressure dropping funnel when the temperature reaches a set temperature, stirring at the speed of 200r/min, starting to drop the rest mixed solution when a reflux phenomenon appears in the four-neck flask, completing the dropping within 2h-3h, performing a heat preservation reaction after completing the dropping, needing to perform 3h-4h, cooling with cold water, and discharging when the temperature is reduced to room temperature to prepare the acrylic glue;
step 2: preparing acrylic modified rubber pressure-sensitive adhesive from acrylic modified rubber, rosin resin, carbon five petroleum resin and an antioxidant in a certain ratio;
and step 3: respectively coating the prepared acrylic glue and the acrylic modified rubber pressure-sensitive adhesive on a single-silicon release film, drying at the temperature of 80-125 ℃ at the machine speed of 15m/min, then laminating the acrylic adhesive layers on the two parts of release films and the acrylic modified rubber pressure-sensitive adhesive layer by a laminating roller, finally rolling, and curing at the temperature of 50 ℃ for 2 days to obtain the non-substrate opposite-sex double-sided adhesive.
Preferably, the release film is a PET release material component, and the sum of the thicknesses of the two adhesive layers is 10 to 40 micrometers.
Preferably, the monomers used for preparing the acrylic acid glue in the step 1 include adhesive monomers, cohesive monomers, modified monomers and temperature-resistant monomers, the adhesive monomers include one or more of butyl acrylate, isooctyl acrylate, 2-ethylhexyl acrylate and ethyl acrylate, the cohesive monomers include one or more of methyl methacrylate, vinyl acetate, styrene and acrylonitrile, the modified monomers include one or more of acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate, polyethylene glycol dimethacrylate and N-hydroxymethyl acrylamide, and the temperature-resistant monomers include one or more of acrylamide, vinyltriethoxysilane and methacrylic acid type liquid isoprene rubber.
Preferably, the cross-linking agent used for preparing the acrylic acid glue in the step 1 comprises one or more of aziridine, aluminum acetylacetonate and diphenylmethane diisocyanate, the solvent used for preparing the acrylic acid glue in the step 1 is ethyl acetate, and the initiator used for preparing the acrylic acid glue in the step 1 is benzoyl peroxide.
Preferably, the mass ratio of each raw material used for preparing the acrylic glue in the step 1 is 100 parts of viscous monomer, 9 to 20 parts of cohesive monomer, 3 to 15 parts of modified monomer, 0.1 to 2.5 parts of temperature-resistant monomer, 0.1 to 1.5 parts of cross-linking agent and 0.1 to 1 part of initiator.
Preferably, the acrylic modified rubber used for preparing the acrylic modified rubber pressure sensitive adhesive in the step 2 is a graft product of acrylic acid and a styrene-butadiene-styrene block polymer, the rosin resin used for preparing the acrylic modified rubber pressure sensitive adhesive in the step 2 comprises one or a mixture of more of hydrogenated rosin resin and common rosin resin, the softening point of the rosin resin is 100-125 ℃, the petroleum resin used for preparing the acrylic modified rubber pressure sensitive adhesive in the step 2 is saturated aliphatic petroleum resin, the softening point of the petroleum resin is 10-80 ℃, and the antioxidant used for preparing the acrylic modified rubber pressure sensitive adhesive in the step 2 is one or a combination of more than one of 1010 and 168.
Preferably, the mass ratio of the raw materials for preparing the acrylic modified rubber pressure-sensitive adhesive in the step 2 is 100 parts of acrylic modified rubber, 50 to 80 parts of rosin resin, 10 to 30 parts of carbon five petroleum resin and 0.1 to 0.5 part of antioxidant.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the preparation method of the substrate-free opposite-nature double-sided tape, the substrate-free opposite-nature double-sided tape is prepared through the thinly coated acrylic acid/acrylic acid modified rubber, the temperature application range is wide (-40-160 ℃), and the substrate-free opposite-nature double-sided tape has excellent high and low temperature resistance, high humidity resistance, yellowing resistance, and good flexibility and mechanical properties;
2. the coating can ensure that the vibrating diaphragm is light and thin enough and has no loss performance, the frequency response and harmonic distortion performance are effectively improved, the good mechanical performance of the vibrating diaphragm can protect the vibrating diaphragm from being damaged by long-term vibration in a high-frequency state, and the good tone quality is kept.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below by taking five sets of constant values as examples within the range of the preparation conditions described therein in combination with the preparation schemes proposed in the schemes of the present invention and analyzing the examples. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the raw material mass ratio of the acrylic acid glue is as follows:
butyl acrylate: isooctyl acrylate: 100 parts of 2-ethylhexyl acrylate (4:2: 2);
methyl methacrylate: vinyl acetate: 9 parts of styrene (2:1: 0.5);
acrylic acid: 6 parts of polyethylene glycol dimethacrylate (1: 1);
0.1 part of aziridine;
0.5 part of benzoyl peroxide;
acrylamide: 0.1 part of vinyl triethoxysilane (1: 1);
the preparation method of the acrylic acid glue comprises the following steps: a stirrer, a reflux condenser and a constant pressure dropping funnel were placed in a 1000mL four-necked flask, and a water bath was opened to raise the temperature to 80 ℃. According to a designed formula, various monomers, an initiator, an additive and a solvent in a certain ratio are mixed, the uniformly mixed solution is added into a constant-pressure dropping funnel, 1/3 of the mixed solution is added into the constant-pressure dropping funnel as a prepolymer after the temperature reaches a set temperature, stirring is carried out at the speed of 200r/min, when a backflow phenomenon occurs in a four-neck flask, the residual mixed solution is started to be dripped, the dripping is completed within 2h-3h, a heat preservation reaction is carried out after the dripping is completed, about 3h-4h is needed, then cooling is carried out by cold water, and the mixed solution is discharged when the temperature is reduced to room temperature.
The acrylic acid modified rubber pressure-sensitive collagen material comprises the following components in percentage by weight:
100 parts of acrylic modified rubber;
80 parts of hydrogenated rosin resin with the softening point of 125 ℃;
10 parts of common petroleum resin with the softening point of 10 ℃;
10100.1 parts of an antioxidant;
the preparation method of the non-substrate opposite sex double-sided adhesive tape comprises the following steps: coating the prepared acrylic acid glue on a release material to obtain a glue thickness of 5 mu m; coating the prepared acrylic acid modified rubber glue on a release material to obtain a glue thickness of 5 mu m; and (3) drying at the temperature of 80-120 ℃, at the machine speed of 15m/min, compounding the acrylic pressure-sensitive adhesive layer on the release material and the acrylic modified rubber adhesive layer through a laminating roller, finally rolling, and curing for 2 days at the temperature of 50 ℃ to obtain the substrate-free opposite-sex double-sided adhesive tape with the adhesive thickness of 10 microns.
Example 2:
the raw material mass ratio of the acrylic acid glue is as follows:
butyl acrylate: isooctyl acrylate: 100 parts of ethyl acrylate (4:1: 1);
methyl methacrylate: 15 parts of vinyl acetate (2: 1);
acrylic acid: polyethylene glycol dimethacrylate: 6 parts of hydroxyethyl acrylate (1: 1);
0.1 part of diphenylmethane diisocyanate;
0.5 part of benzoyl peroxide;
acrylamide: 2 parts of methacrylic acid type liquid isoprene rubber (1: 1);
the preparation method of the acrylic acid glue comprises the following steps: a stirrer, a reflux condenser and a constant pressure dropping funnel were placed in a 1000mL four-necked flask, and a water bath was opened to raise the temperature to 80 ℃. According to a designed formula, various monomers, an initiator, an additive and a solvent in a certain ratio are mixed, the uniformly mixed solution is added into a constant-pressure dropping funnel, 1/3 of the mixed solution is added into the constant-pressure dropping funnel as a prepolymer after the temperature reaches a set temperature, stirring is carried out at the speed of 200r/min, when a backflow phenomenon occurs in a four-neck flask, the residual mixed solution is started to be dripped, the dripping is completed within 2h-3h, a heat preservation reaction is carried out after the dripping is completed, about 3h-4h is needed, then cooling is carried out by cold water, and the mixed solution is discharged when the temperature is reduced to room temperature.
The acrylic acid modified rubber pressure-sensitive collagen material comprises the following components in percentage by weight:
100 parts of acrylic modified rubber;
70 parts of hydrogenated rosin resin with the softening point of 115 ℃;
20 parts of saturated petroleum resin with the softening point of 50 ℃;
10100.5 parts of an antioxidant;
the preparation method of the non-substrate opposite sex double-sided adhesive tape comprises the following steps: coating the prepared acrylic acid glue on a release material to obtain a glue thickness of 10 mu m; coating the prepared acrylic acid modified rubber glue on a release material to obtain a glue thickness of 5 mu m; and (3) drying at the temperature of 80-120 ℃, at the machine speed of 15m/min, compounding the acrylic pressure-sensitive adhesive layer on the release material and the acrylic modified rubber adhesive layer through a laminating roller, finally rolling, and curing for 2 days at the temperature of 50 ℃ to obtain the substrate-free opposite-sex double-sided adhesive tape with the adhesive thickness of 15 microns.
Example 3:
the raw material mass ratio of the acrylic acid glue is as follows:
butyl acrylate: 100 parts of isooctyl acrylate (4: 1);
methyl methacrylate: 20 parts of styrene (2: 1);
hydroxyethyl acrylate: 10 parts of N-methylolacrylamide (1: 1);
diphenylmethane diisocyanate: 1 part of aluminum acetylacetonate (6: 1);
1.0 part of benzoyl peroxide;
2.5 parts of acrylamide;
the preparation method of the acrylic acid glue comprises the following steps: a stirrer, a reflux condenser and a constant pressure dropping funnel were placed in a 1000mL four-necked flask, and a water bath was opened to raise the temperature to 80 ℃. According to a designed formula, various monomers, an initiator, an additive and a solvent in a certain ratio are mixed, the uniformly mixed solution is added into a constant-pressure dropping funnel, 1/3 of the mixed solution is added into the constant-pressure dropping funnel as a prepolymer after the temperature reaches a set temperature, stirring is carried out at the speed of 200r/min, when a backflow phenomenon occurs in a four-neck flask, the residual mixed solution is started to be dripped, the dripping is completed within 2h-3h, a heat preservation reaction is carried out after the dripping is completed, about 3h-4h is needed, then cooling is carried out by cold water, and the mixed solution is discharged when the temperature is reduced to room temperature.
The acrylic acid modified rubber pressure-sensitive collagen material comprises the following components in percentage by weight:
100 parts of acrylic modified rubber;
80 parts of hydrogenated rosin resin with the softening point of 100 ℃;
30 parts of saturated petroleum resin with a softening point of 80 ℃;
antioxidant 1010: 168(1:1)0.5 portion;
the preparation method of the non-substrate opposite sex double-sided adhesive tape comprises the following steps: coating the prepared acrylic acid glue on a release material to obtain a glue thickness of 15 mu m; coating the prepared acrylic acid modified rubber glue on a release material to obtain a glue thickness of 10 mu m; and (3) drying at the temperature of 80-120 ℃, at the machine speed of 15m/min, compounding the acrylic pressure-sensitive adhesive layer on the release material and the acrylic modified rubber adhesive layer through a laminating roller, finally rolling, and curing for 2 days at the temperature of 50 ℃ to obtain the non-substrate opposite-sex double-sided adhesive tape with the adhesive thickness of 25 mu m.
Example 4:
the raw material mass ratio of the acrylic acid glue is as follows:
ethyl acrylate: 100 parts of isooctyl acrylate (3: 1);
20 parts of methyl methacrylate;
hydroxyethyl acrylate: 15 parts of N-hydroxymethyl acrylamide (1: 1);
1.5 parts of aziridine;
0.8 part of benzoyl peroxide;
2.0 parts of vinyl triethoxysilane;
the preparation method of the acrylic acid glue comprises the following steps: a stirrer, a reflux condenser and a constant pressure dropping funnel were placed in a 1000mL four-necked flask, and a water bath was opened to raise the temperature to 80 ℃. According to a designed formula, various monomers, an initiator, an additive and a solvent in a certain ratio are mixed, the uniformly mixed solution is added into a constant-pressure dropping funnel, 1/3 of the mixed solution is added into the constant-pressure dropping funnel as a prepolymer after the temperature reaches a set temperature, stirring is carried out at the speed of 200r/min, when a backflow phenomenon occurs in a four-neck flask, the residual mixed solution is started to be dripped, the dripping is completed within 2h-3h, a heat preservation reaction is carried out after the dripping is completed, about 3h-4h is needed, then cooling is carried out by cold water, and the mixed solution is discharged when the temperature is reduced to room temperature.
The acrylic acid modified rubber pressure-sensitive collagen material comprises the following components in percentage by weight:
100 parts of acrylic modified rubber;
hydrogenated rosin resin: common rosin resins (8:2) with softening points of 50 parts at 100 ℃;
30 parts of saturated petroleum resin with a softening point of 80 ℃;
antioxidant 1010: 168(1:1)0.5 portion.
The preparation method of the non-substrate opposite sex double-sided adhesive tape comprises the following steps: coating the prepared acrylic acid glue on a release material to obtain a glue thickness of 20 mu m; coating the prepared acrylic acid modified rubber glue on a release material to obtain a glue thickness of 20 mu m; and (3) drying at the temperature of 80-120 ℃, and at the machine speed of 15m/min, compounding the acrylic pressure-sensitive adhesive layer on the release material and the acrylic modified rubber adhesive layer through a laminating roller, finally rolling, and curing for 2 days at the temperature of 50 ℃ to obtain the substrate-free opposite-sex double-sided adhesive tape with the adhesive thickness of 40 microns.
Example 5:
the raw material mass ratio of the acrylic acid glue is as follows:
butyl acrylate: 100 parts of 2-ethylhexyl acrylate (4: 1);
15 parts of vinyl acetate;
acrylic acid: 8 parts of N-methylolacrylamide (2: 1);
0.7 part of aziridine;
0.8 part of benzoyl peroxide;
0.5 part of methacrylic acid type liquid isoprene rubber;
the preparation method of the acrylic acid glue comprises the following steps: a stirrer, a reflux condenser and a constant pressure dropping funnel were placed in a 1000mL four-necked flask, and a water bath was opened to raise the temperature to 80 ℃. According to a designed formula, various monomers, an initiator, an additive and a solvent in a certain ratio are mixed, the uniformly mixed solution is added into a constant-pressure dropping funnel, 1/3 of the mixed solution is added into the constant-pressure dropping funnel as a prepolymer after the temperature reaches a set temperature, stirring is carried out at the speed of 200r/min, when a backflow phenomenon occurs in a four-neck flask, the residual mixed solution is started to be dripped, the dripping is completed within 2h-3h, a heat preservation reaction is carried out after the dripping is completed, about 3h-4h is needed, then cooling is carried out by cold water, and the mixed solution is discharged when the temperature is reduced to room temperature.
The acrylic acid modified rubber pressure-sensitive collagen material comprises the following components in percentage by weight:
100 parts of acrylic modified rubber;
hydrogenated rosin resin: common rosin resins (8:2) with softening points of 50 parts at 100 ℃;
20 parts of petroleum resin with the softening point of 10 ℃;
antioxidant 1010: 168(1:1)0.5 portion.
The preparation method of the non-substrate opposite sex double-sided adhesive tape comprises the following steps: coating the prepared acrylic acid glue on a release material to obtain a glue thickness of 20 mu m; coating the prepared acrylic acid modified rubber pressure-sensitive adhesive on a release material to obtain a coating with the thickness of 15 mu m; and (3) drying at the temperature of 80-120 ℃, at the machine speed of 15m/min, compounding the acrylic pressure-sensitive adhesive layer on the release material and the acrylic modified rubber adhesive layer through a laminating roller, finally rolling, and curing for 2 days at the temperature of 50 ℃ to obtain the substrate-free opposite-sex double-sided adhesive tape with the adhesive thickness of 35 mu m.
The finished products obtained in examples 1 to 5 were subjected to performance testing experiments, and the results were as follows:
the data show that the substrate-free anisotropic double-sided adhesive tape can be kept stable at the temperature of-40-160 ℃, and a 160 ℃/1h sample is smooth, has no wrinkles and no yellowing; circulating for 30 times at 80 ℃/1h to-40 ℃/1 h: the sample has no shrinkage on the flat edge; no yellowing; 80 ℃/240 h: the surface is flat, and the edge is not wrinkled, yellowed and slightly warped; -40 ℃/240 h: the middle part is flat, the edge is not wrinkled and yellowed, and the corners are not warped and curled; the paint has excellent high and low temperature resistance, high humidity resistance and yellowing resistance; the substrate-free anisotropic double-sided tape has excellent mechanical properties, the elongation at break of the adhesive film is as high as 400%, the tensile strength is 4.89MPa, the good flexibility and the mechanical properties of the adhesive film can protect the diaphragm from being damaged by long-term vibration in a high-frequency state, and the good tone quality is kept; the damping film can be well attached to a polymer film, and the damping performance of the vibrating film is improved; the peeling force is reduced by less than 15% in 72h under the high-temperature and high-humidity environment of 85 ℃/85%, and the waterproof and moisture-proof performance of the loudspeaker is greatly improved; the thickness of the adhesive layer can reach 10 mu m, so that the vibrating diaphragm is light and thin enough, and the frequency response and harmonic distortion performance are effectively improved.
In conclusion, the preparation method of the substrate-free opposite-sex double-sided tape has the advantages that the substrate-free opposite-sex double-sided tape is prepared through the thin-coated acrylic acid/acrylic acid modified rubber, the temperature application range is wide (-40 ℃ -160 ℃), the high and low temperature resistance, the high humidity resistance and the yellowing resistance are excellent, the flexibility and the mechanical performance are good, the vibrating diaphragm can be made to be thin enough and light without losing performance through coating, the frequency response and the harmonic distortion performance are effectively improved, the good mechanical performance protects the vibrating diaphragm from being damaged due to long-term vibration in a high-frequency state, and the good tone quality is kept.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A preparation method of a non-substrate opposite-nature double-sided adhesive tape is characterized by comprising the following steps:
step 1: putting a stirrer, a reflux condenser and a constant-pressure dropping funnel on a 1000mL four-neck flask, opening a water bath kettle, raising the temperature to 80 ℃, then mixing various monomers, an initiator, an additive and a solvent in a certain proportion, then adding the uniformly mixed solution into the constant-pressure dropping funnel, adding 1/3 of the mixed solution as a prepolymer from the constant-pressure dropping funnel when the temperature reaches a set temperature, stirring at the speed of 200r/min, starting to drop the rest mixed solution when a reflux phenomenon appears in the four-neck flask, completing the dropping within 2h-3h, performing a heat preservation reaction after completing the dropping, needing to perform 3h-4h, cooling with cold water, and discharging when the temperature is reduced to room temperature to prepare the acrylic glue;
step 2: preparing acrylic modified rubber pressure-sensitive adhesive from acrylic modified rubber, rosin resin, carbon five petroleum resin and an antioxidant in a certain ratio;
and step 3: respectively coating the prepared acrylic glue and the acrylic modified rubber pressure-sensitive adhesive on a single-silicon release film, drying at the temperature of 80-125 ℃ at the machine speed of 15m/min, then laminating the acrylic adhesive layers on the two parts of release films and the acrylic modified rubber pressure-sensitive adhesive layer by a laminating roller, finally rolling, and curing at the temperature of 50 ℃ for 2 days to obtain the non-substrate opposite-sex double-sided adhesive.
2. The method for preparing non-substrate double-sided adhesive tape with different properties as claimed in claim 1, wherein the release film is a PET release material member, and the sum of the thicknesses of the two adhesive layers is 10 to 40 μm.
3. The method for preparing the non-substrate double-sided adhesive tape with different properties as claimed in claim 1, wherein the monomers used for preparing the acrylic glue in step 1 comprise adhesive monomers, cohesive monomers, modified monomers and temperature-resistant monomers, the viscous monomer comprises one or more of butyl acrylate, isooctyl acrylate, 2-ethylhexyl acrylate and ethyl acrylate, the cohesive monomer comprises one or more of methyl methacrylate, vinyl acetate, styrene and acrylonitrile, the modified monomer comprises one or more of acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate, polyethylene glycol dimethacrylate and N-hydroxymethyl acrylamide, the temperature-resistant monomer comprises one or more of acrylamide, vinyl triethoxysilane and methacrylic acid type liquid isoprene rubber.
4. The method for preparing the non-substrate double-sided adhesive tape with different properties as claimed in claim 1, wherein the cross-linking agent used for preparing the acrylic glue in step 1 comprises one or more of aziridine, aluminum acetylacetonate and diphenylmethane diisocyanate, the solvent used for preparing the acrylic glue in step 1 is ethyl acetate, and the initiator used for preparing the acrylic glue in step 1 is benzoyl peroxide.
5. The method for preparing the non-substrate double-sided adhesive tape with different properties according to claim 3, wherein the raw materials used for preparing the acrylic glue in the step 1 comprise 100 parts of adhesive monomer, 9 to 20 parts of cohesive monomer, 3 to 15 parts of modified monomer, 0.1 to 2.5 parts of temperature-resistant monomer, 0.1 to 1.5 parts of cross-linking agent and 0.1 to 1 part of initiator by mass.
6. The method for preparing the non-substrate opposite-sided adhesive tape according to claim 1, wherein the acrylic modified rubber used for preparing the acrylic modified rubber pressure-sensitive adhesive in the step 2 is a graft product of acrylic acid and a styrene-butadiene-styrene block polymer, the rosin resin used for preparing the acrylic modified rubber pressure-sensitive adhesive in the step 2 comprises one or a mixture of hydrogenated rosin resin and common rosin resin, the softening point of the rosin resin is 100 to 125 ℃, the petroleum resin used for preparing the acrylic modified rubber pressure-sensitive adhesive in the step 2 is saturated aliphatic petroleum resin with the softening point of 10 to 80 ℃, and the antioxidant used for preparing the acrylic modified rubber pressure-sensitive adhesive in the step 2 is one or a combination of more than one of 1010 and 168.
7. The method for preparing the non-substrate double-sided adhesive tape with the opposite characteristic as claimed in claim 1, wherein the raw materials used for preparing the acrylic modified rubber pressure sensitive adhesive in the step 2 comprise, by mass, 100 parts of acrylic modified rubber, 50 to 80 parts of rosin resin, 10 to 30 parts of carbon five petroleum resin and 0.1 to 0.5 part of antioxidant.
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| CN115678448A (en) * | 2022-10-17 | 2023-02-03 | 苏州赛伍应用技术股份有限公司 | Acrylic pressure-sensitive adhesive for blue film of battery cell and resisting heat and humidity aging, and preparation method and application 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115678448A (en) * | 2022-10-17 | 2023-02-03 | 苏州赛伍应用技术股份有限公司 | Acrylic pressure-sensitive adhesive for blue film of battery cell and resisting heat and humidity aging, and preparation method and application thereof |
| CN115678448B (en) * | 2022-10-17 | 2023-11-03 | 苏州赛伍应用技术股份有限公司 | Acrylic acid pressure-sensitive adhesive for cell blue film and humidity and heat aging resistance, and preparation method and application 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 |
| 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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