CN112143395A - Double-sided adhesive material and preparation method and application thereof - Google Patents
Double-sided adhesive material and preparation method and application thereof Download PDFInfo
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- CN112143395A CN112143395A CN202011019377.3A CN202011019377A CN112143395A CN 112143395 A CN112143395 A CN 112143395A CN 202011019377 A CN202011019377 A CN 202011019377A CN 112143395 A CN112143395 A CN 112143395A
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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
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/255—Polyesters
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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
- C09J11/08—Macromolecular additives
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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
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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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
-
- 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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- 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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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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
- C09J2433/00—Presence of (meth)acrylic polymer
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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
- C09J2463/00—Presence of epoxy resin
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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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to the technical field of double-sided adhesive tapes, and particularly provides a double-sided adhesive material as well as a preparation method and application thereof. The invention provides a double-sided adhesive material, which comprises a first release film layer, a first adhesive layer, a base material layer, a second adhesive layer and a second release film layer from top to bottom; the substrate layer is a PET transparent film. In the preparation process of the adhesive layer, specific raw materials are selected and the addition amount is controlled, so that the crosslinking density is high, the cohesive force of the fluidity of the adhesive layer can be enhanced, and in the use process, small gaps can be seamlessly bonded, and the bonding is rapid, high and stable in bonding strength. In addition, the components interact with each other, the aging resistance of the adhesive layer at high and low temperatures can be improved, the service life is long, and the adhesive can be better applied to electronic elements, graphite, epoxy sheets, ultrathin foam and stainless steel radiating fins.
Description
Technical Field
The invention relates to the technical field of double-sided adhesive tapes, and particularly provides a double-sided adhesive material as well as a preparation method and application thereof.
Background
With the development of intelligent products towards the trend of multiple functions, small volume and strong performance, in order to save the internal space of the products, the components of the intelligent products become more exquisite, and the gaps between the components become more delicate, which puts more rigorous requirements on the thickness and the adhesive force of the double-sided adhesive tape, and especially needs to be capable of bonding between the tiny gaps.
Therefore, the research and development of a thin double-sided adhesive tape with strong adhesion, durable viscosity, good temperature resistance and long service life is a difficult problem to be solved at present.
Disclosure of Invention
In order to solve the technical problems, the first aspect of the invention provides a double-sided adhesive material, which comprises a first release film layer, a first adhesive layer, a base material layer, a second adhesive layer and a second release film layer from top to bottom; the substrate layer is a PET transparent film.
As a preferred technical scheme of the present invention, the first adhesive layer and the second adhesive layer both comprise the following raw materials in parts by weight: 90-110 parts of acrylic acid adhesive, 30-40 parts of diluent, 0.07-0.09 part of additive and 0.3-0.4 part of curing agent.
As a preferable technical scheme of the invention, the diluent is selected from one or a combination of more of ethyl acetate, petroleum ether, toluene, xylene, butanone and butyl acetate.
As a preferred technical scheme of the invention, the additive is selected from one or a combination of a plurality of biphenyl type epoxy resin, dicyclopentadiene type epoxy resin, alicyclic epoxy resin, heterocyclic type epoxy resin, o-cresol novolac epoxy resin, bisphenol A type epoxy resin and bisphenol F type epoxy resin.
In a preferred embodiment of the present invention, the bisphenol a epoxy resin has a viscosity of 1500 to 2000mPa · s and an epoxy value of 0.8 to 1.
As a preferable technical scheme of the invention, the curing agent is isocyanate curing agent and/or epoxy curing agent.
As a preferable technical scheme of the invention, the isocyanate curing agent is aliphatic polyisocyanate; the aliphatic polyisocyanate has an isocyanate matrix content of 17 to 21% and a viscosity of 300 to 700 mPas at 25 ℃.
The second aspect of the invention provides a preparation method of the double-sided adhesive material, which at least comprises the following steps:
(1) adding an acrylic acid adhesive and a diluent into a reaction kettle, sequentially adding an additive and a curing agent while stirring, uniformly stirring, and standing for defoaming to obtain the adhesive;
(2) coating an adhesive on the first release layer, drying, and then placing on the surface of the PET transparent film for rolling; coating the adhesive on the second release layer, drying, placing on the reverse side of the PET transparent film for rolling, curing at 50 ℃, and slitting to obtain the PET transparent film.
In a preferred embodiment of the present invention, the coating mode in the step (2) is selected from any one of knife coating, roll coating, gravure coating, dimple coating, slot extrusion coating, spray coating, and die coating.
The third aspect of the invention provides application of the double-sided adhesive material to electronic components, graphite, silty sheets, ultrathin foam and stainless steel radiating fins.
Has the advantages that: the invention provides a double-sided adhesive material and a preparation method and application thereof.A PET transparent film is used as a base material, and in the preparation process of an adhesive layer, specific raw materials are selected and the addition amount is controlled, so that the crosslinking density is high, the cohesive force of the fluidity of the adhesive layer can be enhanced, and in the use process, small gaps can be seamlessly adhered, and the adhesion is rapid, high and stable in adhesion strength. In addition, the components interact with each other, the aging resistance of the adhesive layer at high and low temperatures can be improved, the service life is long, and the adhesive can be better applied to electronic elements, graphite, epoxy sheets, ultrathin foam and stainless steel radiating fins.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the number clearly indicates the singular.
In order to solve the technical problems, the first aspect of the invention provides a double-sided adhesive material, which comprises a first release film layer, a first adhesive layer, a base material layer, a second adhesive layer and a second release film layer from top to bottom; the substrate layer is a PET transparent film.
In a preferred embodiment, the first adhesive layer and the second adhesive layer each comprise the following raw materials in parts by weight: 90-110 parts of acrylic acid adhesive, 30-40 parts of diluent, 0.07-0.09 part of additive and 0.3-0.4 part of curing agent.
In a preferred embodiment, the first adhesive layer and the second adhesive layer each comprise the following raw materials in parts by weight: 100 parts of acrylic acid adhesive, 35 parts of diluent, 0.08 part of additive and 0.36 part of curing agent.
Acrylic acid adhesive
The acrylic adhesives of the present invention are commercially available, including but not limited to the Lode adhesive MX/T6 available from technologies, Inc. of Reid, Beijing.
Diluent
The diluent is selected from one or a combination of more of ethyl acetate, petroleum ether, toluene, xylene, butanone and butyl acetate.
In a preferred embodiment, the diluent is ethyl acetate.
Additive agent
The additive is selected from one or a combination of a plurality of biphenyl type epoxy resin, dicyclopentadiene type epoxy resin, alicyclic epoxy resin, heterocyclic type epoxy resin, o-cresol formaldehyde epoxy resin, bisphenol A type epoxy resin and bisphenol F type epoxy resin.
In a preferred embodiment, the additive is a bisphenol a epoxy resin.
In a more preferred embodiment, the bisphenol A epoxy resin has a viscosity of 1500 to 2000mPa · s and an epoxy value of 0.8 to 1; preferably, the bisphenol a epoxy resin has a viscosity of 1700mPa · s and an epoxy value of 0.96.
In a more preferred embodiment, the bisphenol A epoxy resin is purchased from AFG-90, of Shanghai friendship resin, Inc.
The viscosity of the bisphenol A epoxy resin is obtained by testing GB/T2794-95 at 25 ℃; the epoxy value is measured by HG 2-741.
Curing agent
The curing agent is isocyanate curing agent and/or epoxy curing agent.
In a preferred embodiment, the curing agent is an isocyanate-based curing agent.
In a more preferred embodiment, the isocyanate-based curing agent is an aliphatic polyisocyanate.
In a more preferred embodiment, the aliphatic polyisocyanate has an isocyanate-based content of 17 to 21% and a viscosity of 300 to 700 mPas at 25 ℃; more preferably, the aliphatic polyisocyanate has an isocyanate group content of 18.5 to 19.5% and a viscosity of 400 to 600 mPas at 25 ℃.
In a more preferred embodiment, the aliphatic polyisocyanate is purchased from Shinshi 3390 of Wuhanshi Quanxing New materials science and technology, Inc.
The aliphatic polyisocyanate is a clear and transparent liquid at normal temperature, and the solid content is about 90 percent.
The isocyanate group content is a mass of isocyanate (-NCO) groups contained in 100g of a sample, and the test method is not limited.
The second aspect of the present invention provides a method for preparing the double-sided adhesive material, comprising the following steps:
(1) adding an acrylic acid adhesive and a diluent into a reaction kettle, sequentially adding an additive and a curing agent while stirring, uniformly stirring, and standing for defoaming to obtain the adhesive;
(2) coating an adhesive on the first release layer, drying, and then placing on the surface of the PET transparent film for rolling; coating the adhesive on the second release layer, drying, placing on the reverse side of the PET transparent film for rolling, curing at 50 ℃, and slitting to obtain the PET transparent film.
In a preferred embodiment, the method for preparing the double-sided adhesive material comprises the following steps:
(1) adding an acrylic acid adhesive and a diluent into a reaction kettle, stirring for 0.5h at 25-28 ℃ at the speed of 500-;
(2) coating an adhesive on a first release layer in a 1000-grade dust-free workshop, drying, compounding the adhesive on the surface of a PET transparent film by a press roller, and then rolling; coating an adhesive on the second release layer, drying, then compounding the adhesive on the reverse side of the PET transparent film by a press roller, rolling, curing for 72 hours at 50 ℃, and slitting to obtain the PET transparent film.
In a preferred embodiment, the coating manner in the step (2) is selected from any one of knife coating, roll coating, gravure coating, micro-gravure coating, slot extrusion coating, spray coating, and die coating; preferably, the coating mode in the step (2) is micro-concave coating.
The thickness of the first release film layer is 23-50 microns, the thickness of the first adhesive layer is 5-30 microns, the thickness of the base material layer is 5-25 microns, the thickness of the second adhesive layer is 5-30 microns, and the thickness of the second release film layer is 36-75 microns.
The second aspect of the invention provides an application of the double-sided adhesive material, which is applied to electronic components, graphite, silicone sheets, ultrathin foam and stainless steel radiating fins.
According to the invention, bisphenol A epoxy resin with the viscosity of 1500-2000 mPas and the epoxy value of 0.8-1 and aliphatic polyisocyanate with the isocyanate matrix content of 17-21% and the viscosity of 300-700 mPas at 25 ℃ are used as curing agents, so that the crosslinking density is favorably improved, the cohesive force of the fluidity of an adhesive layer can be enhanced, fine gaps can be seamlessly bonded in the using process, and the bonding is rapid, high in bonding strength and stable. In addition, the components interact with each other, the aging resistance of the adhesive layer at high and low temperatures can be improved, the service life is long, and the adhesive can be better applied to electronic elements, graphite, epoxy sheets, ultrathin foam and stainless steel radiating fins.
Examples
In order to better understand the above technical solutions, the following detailed descriptions will be provided with reference to specific embodiments. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention. In addition, the starting materials used are all commercially available, unless otherwise specified.
Example 1
Embodiment 1 of the present invention provides a double-sided adhesive material, which includes, from top to bottom, a first release film layer, a first adhesive layer, a substrate layer, a second adhesive layer, and a second release film layer; the substrate layer is a PET transparent film.
The first adhesive layer and the second adhesive layer both comprise the following raw materials in parts by weight: 90 parts of acrylic acid adhesive, 30 parts of diluent, 0.07 part of additive and 0.3 part of curing agent.
The acrylic adhesive is purchased from the Lode adhesive MX/T6 of science and technology Limited in Beijing Reid.
The diluent is ethyl acetate.
The additive is bisphenol A epoxy resin; the bisphenol A epoxy resin is purchased from AFG-90, Shanghai, Kataover resin, Inc.
The curing agent is aliphatic polyisocyanate; the aliphatic polyisocyanate was purchased from Shi Quanxing 3390 of Wuhan Shi Quanxing New materials science and technology GmbH.
The preparation method of the double-sided adhesive material comprises the following steps:
(1) adding an acrylic acid adhesive and a diluent into a reaction kettle, stirring at 26 ℃ at 800r/min for 0.5h, then adding an additive, stirring for 0.1h, then adding a curing agent, continuously stirring for 0.5h, standing for defoaming, and thus obtaining the adhesive;
(2) coating an adhesive on a first release layer in a 1000-grade dust-free workshop, drying, compounding the adhesive on the surface of a PET transparent film by a press roller, and then rolling; coating an adhesive on the second release layer, drying, then compounding the adhesive on the reverse side of the PET transparent film by a press roller, rolling, curing for 72 hours at 50 ℃, and slitting to obtain the PET transparent film.
The coating mode in the step (2) is micro-concave coating.
Example 2
Embodiment 2 of the present invention provides a double-sided adhesive material, which comprises, from top to bottom, a first release film layer, a first adhesive layer, a substrate layer, a second adhesive layer, and a second release film layer; the substrate layer is a PET transparent film.
The first adhesive layer and the second adhesive layer both comprise the following raw materials in parts by weight: 110 parts of acrylic acid adhesive, 40 parts of diluent, 0.09 part of additive and 0.4 part of curing agent.
The acrylic adhesive is purchased from the Lode adhesive MX/T6 of science and technology Limited in Beijing Reid.
The diluent is ethyl acetate.
The additive is bisphenol A epoxy resin; the bisphenol A epoxy resin is purchased from AFG-90, Shanghai, Kataover resin, Inc.
The curing agent is aliphatic polyisocyanate; the aliphatic polyisocyanate was purchased from Shi Quanxing 3390 of Wuhan Shi Quanxing New materials science and technology GmbH.
The preparation method of the double-sided adhesive material comprises the following steps:
(1) adding an acrylic acid adhesive and a diluent into a reaction kettle, stirring at 26 ℃ at 800r/min for 0.5h, then adding an additive, stirring for 0.1h, then adding a curing agent, continuously stirring for 0.5h, standing for defoaming, and thus obtaining the adhesive;
(2) coating an adhesive on a first release layer in a 1000-grade dust-free workshop, drying, compounding the adhesive on the surface of a PET transparent film by a press roller, and then rolling; coating an adhesive on the second release layer, drying, then compounding the adhesive on the reverse side of the PET transparent film by a press roller, rolling, curing for 72 hours at 50 ℃, and slitting to obtain the PET transparent film.
The coating mode in the step (2) is micro-concave coating.
Example 3
Embodiment 3 of the present invention provides a double-sided adhesive material, which comprises, from top to bottom, a first release film layer, a first adhesive layer, a substrate layer, a second adhesive layer, and a second release film layer; the substrate layer is a PET transparent film.
The first adhesive layer and the second adhesive layer both comprise the following raw materials in parts by weight: 100 parts of acrylic acid adhesive, 35 parts of diluent, 0.08 part of additive and 0.36 part of curing agent.
The acrylic adhesive is purchased from the Lode adhesive MX/T6 of science and technology Limited in Beijing Reid.
The diluent is ethyl acetate.
The additive is bisphenol A epoxy resin; the bisphenol A epoxy resin is purchased from AFG-90, Shanghai, Kataover resin, Inc.
The curing agent is aliphatic polyisocyanate; the aliphatic polyisocyanate was purchased from Shi Quanxing 3390 of Wuhan Shi Quanxing New materials science and technology GmbH.
The preparation method of the double-sided adhesive material comprises the following steps:
(1) adding an acrylic acid adhesive and a diluent into a reaction kettle, stirring at 26 ℃ at 800r/min for 0.5h, then adding an additive, stirring for 0.1h, then adding a curing agent, continuously stirring for 0.5h, standing for defoaming, and thus obtaining the adhesive;
(2) coating an adhesive on a first release layer in a 1000-grade dust-free workshop, drying, compounding the adhesive on the surface of a PET transparent film by a press roller, and then rolling; coating an adhesive on the second release layer, drying, then compounding the adhesive on the reverse side of the PET transparent film by a press roller, rolling, curing for 72 hours at 50 ℃, and slitting to obtain the PET transparent film.
The coating mode in the step (2) is micro-concave coating.
Comparative example 1
Comparative example 1 of the present invention provides a double-sided adhesive material, which is embodied in the same manner as in example 3 except that the additive is added in an amount of 0.15 parts by weight.
Comparative example 2
Comparative example 2 of the present invention provides a double-sided adhesive material, which is similar to example 3 except that the curing agent is 1 part by weight.
Comparative example 3
Comparative example 3 of the present invention provides a double-sided adhesive material, which is similar to example 3 except that the curing agent is 0.1 part by weight.
Comparative example 4
Comparative example 4 of the invention provides a double-sidedAn adhesive material was prepared in the same manner as in example 3, except that the bisphenol A epoxy resin was purchased from Andebao, a company of friendship resin, Inc. of Shanghai
328。
Comparative example 5
The embodiment of the invention is the same as that of the embodiment 3, except that the curing agent is an anionic hydrophilic modified polyisocyanate prepolymer, the isocyanate matrix content of the polyisocyanate prepolymer is 19.5-20.5%, the viscosity at 25 ℃ is 4000-5000 mPa & S, and the double-sided adhesive material is purchased from Shiquan Quanxing S-100TDS of Wuhanshi Quanxing New Material science and technology GmbH.
Comparative example 6
The invention provides a comparative example 6, which is a double-sided adhesive material and is similar to the embodiment 3 in the specific implementation manner, except that the curing agent is an anionic hydrophilic modified polyisocyanate prepolymer, the isocyanate matrix content of the polyisocyanate prepolymer is 16-16.5%, the viscosity of the polyisocyanate prepolymer at 25 ℃ is 200-1000 mPa & S, and the polyisocyanate prepolymer is purchased from Shiquanxing S-208 of Wuhanshi Quanxing new material science and technology company Limited.
Performance testing
1. Adhesion test
The double-sided adhesive materials prepared in the examples and the comparative examples are tested according to GB/T2792-2014, wherein the adhesive force is marked as A when being more than 1200g, the adhesive force is marked as B when being 700-1200 g, and the adhesive force is marked as C when being less than 700 g.
2. Initial adhesion test
The double-sided adhesive materials prepared in examples and comparative examples were tested according to the Rolling ball test method (J.DOW method), wherein the initial adhesion was designated A at > #5, B at #2 to #5, and C at < # 2.
3. Permanent adhesion test
The double-sided adhesive materials prepared in the examples and the comparative examples are according to GB/T4851-2014, 72h/1kg/in2And (6) carrying out testing. WhereinThe permanent adhesive force is marked as A when the permanent adhesive force is less than 2mm, B when the permanent adhesive force is 2-10 mm, and C when the permanent adhesive force is more than 10 mm.
4. Temperature resistance test
The double-sided adhesive materials prepared in the examples and comparative examples were placed at 80 ℃ for 168h according to GB/T4851-2014, 72h/1kg/in2And (6) carrying out testing. Wherein, the adhesive force is marked as A when the adhesive force is less than 5mm, B when the adhesive force is 5-15mm, and C when the adhesive force is more than 15 mm.
5. Aging resistance test
Placing the double-sided adhesive materials prepared in the embodiment and the comparative example at 85 ℃ and 0 ℃ for 30h respectively, detecting the quality condition of the double-sided adhesive material, and recording as qualified if no crack or warping phenomenon exists; otherwise, the test is recorded as unqualified.
TABLE 1
As can be seen from the data in Table 1, the double-sided adhesive material prepared by the invention has good adhesive force and initial adhesive force, and excellent permanent adhesive force performance; meanwhile, the heat sink has ideal temperature resistance and aging resistance, has long service life, and can be better applied to electronic elements, graphite, setting films, ultrathin foam and stainless steel heat sinks.
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (10)
1. A double-sided adhesive material is characterized by comprising a first release film layer, a first adhesive layer, a base material layer, a second adhesive layer and a second release film layer from top to bottom; the substrate layer is a PET transparent film.
2. The double-sided adhesive material according to claim 1, wherein the first adhesive layer and the second adhesive layer each comprise the following raw materials in parts by weight: 90-110 parts of acrylic acid adhesive, 30-40 parts of diluent, 0.07-0.09 part of additive and 0.3-0.4 part of curing agent.
3. The double-sided adhesive material as claimed in claim 2, wherein the diluent is selected from one or more of ethyl acetate, petroleum ether, toluene, xylene, methyl ethyl ketone and butyl acetate.
4. The double-sided adhesive material according to claim 2 or 3, wherein the additive is selected from one or more of biphenyl epoxy resin, dicyclopentadiene epoxy resin, alicyclic epoxy resin, heterocyclic epoxy resin, o-cresol novolac epoxy resin, bisphenol A epoxy resin and bisphenol F epoxy resin.
5. The double-sided adhesive material according to claim 4, wherein the bisphenol A epoxy resin has a viscosity of 1500 to 2000 mPas and an epoxy value of 0.8 to 1.
6. The double-sided adhesive material according to claim 2, wherein the curing agent is an isocyanate-based curing agent and/or an epoxy-based curing agent.
7. The double-sided adhesive material according to claim 6, wherein the isocyanate-based curing agent is an aliphatic polyisocyanate; the aliphatic polyisocyanate has an isocyanate matrix content of 17 to 21% and a viscosity of 300 to 700 mPas at 25 ℃.
8. The method for preparing the double-sided adhesive material according to any one of claims 1 to 7, characterized by comprising at least the following steps:
(1) adding an acrylic acid adhesive and a diluent into a reaction kettle, sequentially adding an additive and a curing agent while stirring, uniformly stirring, and standing for defoaming to obtain the adhesive;
(2) coating an adhesive on the first release layer, drying, and then placing on the surface of the PET transparent film for rolling; coating the adhesive on the second release layer, drying, placing on the reverse side of the PET transparent film for rolling, curing at 50 ℃, and slitting to obtain the PET transparent film.
9. The method for preparing a double-sided adhesive material according to claim 8, wherein the coating manner in the step (2) is selected from any one of knife coating, roll coating, gravure coating, dimple coating, slot extrusion coating, spray coating and die coating.
10. The use of the double-sided adhesive material according to any one of claims 1 to 7, wherein the double-sided adhesive material is used for electronic components, graphite, prepreg sheets, ultra-thin foam, and stainless steel heat sinks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011019377.3A CN112143395A (en) | 2020-09-25 | 2020-09-25 | Double-sided adhesive material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011019377.3A CN112143395A (en) | 2020-09-25 | 2020-09-25 | Double-sided adhesive material and preparation method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115433529A (en) * | 2022-09-23 | 2022-12-06 | 江苏伊诺尔新材料科技有限公司 | Shock-absorbing noise-reducing antistatic high-temperature-resistant adhesive tape and preparation method thereof |
| CN115505344A (en) * | 2022-09-23 | 2022-12-23 | 江苏伊诺尔新材料科技有限公司 | High-temperature-resistance blue-shielding double-sided adhesive tape and preparation process thereof |
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| CN115505344A (en) * | 2022-09-23 | 2022-12-23 | 江苏伊诺尔新材料科技有限公司 | High-temperature-resistance blue-shielding double-sided adhesive tape and preparation process thereof |
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