Quick-adhesive double-sided tape and preparation method thereof
By designing double-sided tapes containing acrylic pressure-sensitive adhesive and interface modifiers on low surface energy materials, and combining precise coating and carrier layer treatment, the bonding problem of traditional tapes on low surface energy materials has been solved, achieving rapid bonding and improved durability, making it suitable for industrial applications in automotive and electronic products.
Patent Information
- Application Number
- CN202510873671.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2025-11-07
AI Technical Summary
Existing technologies struggle to achieve rapid bonding on low surface energy materials. Traditional tapes have insufficient initial tack, lengthy curing cycles, and are prone to phase separation in high temperature and humidity environments, failing to meet the rapid operation requirements of modern production lines.
The double-sided tape design, which contains acrylic pressure-sensitive adhesive, tackifying resin and interface modifier, achieves precise coating through a combination of comma doctor blade and microgravure coating system. Combined with corona treatment or plasma activation of the carrier layer, a nanoscale dispersion system is formed, which improves the wetting ability of the adhesive layer on low surface energy materials.
It enables rapid bonding of low surface energy materials, effectively shortens the bonding formation time, and improves initial tack and durability, making it suitable for automotive sealing strip assembly and electronic product cushioning material fixing.
Smart Images
Figure CN120904818A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of adhesives, in particular to a fast-adhesion double-sided adhesive tape and a preparation method thereof. BACKGROUND
[0002] Low-surface-energy foamed materials (such as PU foam and PE foam) have a surface energy lower than 35 mN / m, and traditional double-sided adhesive tapes need to rely on external pressure assistance and long-term soaking to achieve adhesion. The existing technologies generally have technical bottlenecks such as insufficient initial adhesion and long curing period, and are difficult to meet the rapid operation requirements of modern production lines. In particular, in the dynamic bonding process of automobile assembly lines, conventional adhesive tapes cannot form effective adhesion strength within a 5-second operation window, directly leading to production line rhythm delay and rising rework rate. It is worth noting that traditional tackifying resins are prone to phase separation in high-temperature and high-humidity environments, significantly affecting the durability of the adhesive layer. Although there are schemes in the existing technologies to add nano fillers to improve the initial adhesion, the coating process has the problem of stress concentration caused by uneven thickness of the adhesive layer; and the ultraviolet curing system proposed in another existing technology is limited in practical application due to the poor light transmission of foamed materials. Although these existing technologies solve the problem of bonding of low-surface-energy foamed materials to some extent, there are still some problems and shortcomings. SUMMARY
[0003] In view of the deficiencies of the existing technologies, a first object of the present application is to provide a fast-adhesion double-sided adhesive tape which can effectively solve the technical problem of rapid adhesion of substrates with a surface energy lower than 35 mN / m, and break through the soaking limitation of traditional adhesives on low-surface-energy materials, thereby shortening the effective adhesion formation time.
[0004] A second object of the present application is to provide a preparation method of the fast-adhesion double-sided adhesive tape.
[0005] To achieve the objects of the present application, the present application provides a fast-adhesion double-sided adhesive tape, which comprises a carrier layer and first and second adhesive layers respectively arranged on both sides of the carrier layer; the first and second adhesive layers respectively comprise the following components in mass percentage: 80wt%-93wt% of an acrylate pressure-sensitive adhesive, 5wt%-15wt% of a first tackifying resin, and 2wt%-5wt% of an interfacial modifier; the acrylate pressure-sensitive adhesive has a solid content of 50wt%-60wt%, a glass transition temperature of-45℃--35℃, and a molecular weight distribution of 1-1.5; the interfacial modifier is a silane coupling agent with an amino group pre-dispersed in an ethanol / water mixed solvent to form a nanoscale dispersion system, and the interfacial modifier is mixed with the acrylate pressure-sensitive adhesive and the first tackifying resin.
[0006] In some embodiments of the present application, the silane coupling agent with an amino group is γ-aminopropyl triethoxysilane or N-β-aminoethyl-γ-aminopropyl trimethoxysilane.
[0007] In some embodiments of the present application, the volume ratio of ethanol and water in the ethanol / water mixed solvent is 3:1.
[0008] In some embodiments of the present application, the mass ratio of the silane coupling agent with amino group and the ethanol / water mixed solvent is 1:(1~10).
[0009] In some embodiments of the present application, the first tackifying resin is terpene phenolic resin or hydrogenated rosin glyceride.
[0010] In some embodiments of the present application, the softening point of the terpene phenolic resin is between 105℃ and 120℃.
[0011] In some embodiments of the present application, the acid value of the hydrogenated rosin glyceride is <15 mgKOH / g.
[0012] In some embodiments of the present application, the carrier layer is non-woven fabric or PET film, and the carrier layer is treated by corona or plasma activation.
[0013] In some embodiments of the present application, the power of the corona treatment is 3kW~5kW, and the linear speed is 10m / min~20m / min.
[0014] In some embodiments of the present application, the gas flow of the plasma activation is 10L / h~30L / h, and the treatment time is 30s~60s.
[0015] In some embodiments of the present application, the surface energy of the carrier layer is 45mN / m~55mN / m, the water contact angle is below 30°, and the surface roughness Ra is between 0.8μm and 1.2μm.
[0016] In some embodiments of the present application, the plasma activation is treated by argon / oxygen mixed gas, and the volume ratio of argon and oxygen is 4:1.
[0017] In some embodiments of the present application, the acrylate pressure sensitive adhesive is made from raw materials comprising the following components by mass: soft monomer 70~100 parts; hard monomer 28~30 parts; functional monomer 4~6 parts; initiator 0.1~0.5 parts; solvent 100 parts; second tackifying resin 5~20 parts; crosslinking agent 1~5 parts; and auxiliary agent 0~2 parts.
[0018] In some embodiments of the present application, the soft monomer is a mixture of butyl acrylate and 2-ethylhexyl acrylate; and the mass ratio of butyl acrylate and 2-ethylhexyl acrylate is (65~94):5.
[0019] In some embodiments of the present application, the hard monomer is a mixture of methyl methacrylate and vinyl acetate, and the mass ratio of methyl methacrylate to vinyl acetate is (0.5-2):1.
[0020] In some embodiments of the present application, the functional monomer is a mixture of acrylic acid and hydroxyethyl acrylate, and the mass ratio of acrylic acid to hydroxyethyl acrylate is (4-5):0.5.
[0021] In some embodiments of the present application, the initiator is at least one of azobisisobutyronitrile and azobis(2-methylbutyronitrile).
[0022] In some embodiments of the present application, the solvent is ethyl acetate.
[0023] In some embodiments of the present application, the second tackifying resin is at least one of rosin, terpene resin, and petroleum resin.
[0024] In some embodiments of the present application, the crosslinking agent is a multi-epoxy compound or a multi-functional acrylate.
[0025] In some embodiments of the present application, the auxiliary agent is at least one of an antioxidant and a plasticizer.
[0026] In some embodiments of the present application, the method for preparing the acrylate pressure-sensitive adhesive comprises adding the soft monomer, the hard monomer, the functional monomer, the initiator, and the solvent into a polymerization reactor in batches.
[0027] In some embodiments of the present application, after the polymerization is completed, the second tackifying resin and the auxiliary agent are added, and finally the crosslinking agent is added and stirred until uniform.
[0028] In some embodiments of the present application, the instant-adhesive double-sided adhesive tape further comprises a release layer, which is arranged on the side of the first adhesive layer or the second adhesive layer away from the carrier layer.
[0029] To achieve the second object of the present application, the present application provides a method for preparing the instant-adhesive double-sided adhesive tape according to any one of the above-mentioned embodiments, which comprises the following steps: using a comma doctor blade and microgravure combined coating system to coat the wet adhesive of the first adhesive layer and the second adhesive layer on both sides of the carrier layer, the thickness of the wet adhesive is accurately controlled to be between 80 μm and 120 μm, the coating amount is between 30 g / m² and 50 g / m², the coating speed is between 5 m / min and 15 m / min, the coating gap control precision is ±5 μm, the environmental humidity is maintained at 45%-55% RH, and the coating uniformity CV value is ≤3.5%; after coating, the wet adhesive is gradiently heated, dried, solidified, and aged.
[0030] Compared with the prior art, the present application can achieve the following beneficial effects: The application provides a rapid-adhesion double-sided adhesive tape dedicated to low-surface-energy foamed materials and a preparation method thereof, and the rapid-adhesion double-sided adhesive tape is particularly suitable for industrial scenes such as automobile sealing strip assembly and electronic product cushion material fixing, and can effectively solve the technical problem of rapid adhesion of a substrate with a surface energy lower than 35 mN / m. Specifically, by introducing an innovative interface modification technology, the application successfully and effectively solves the technical problem of rapid adhesion of a substrate with a surface energy lower than 35 mN / m, breaks through the infiltration limitation of traditional adhesives on low-surface-energy materials, and shortens the effective adhesion formation time. BRIEF DESCRIPTION OF DRAWINGS
[0031] Figure 1 is a structural schematic diagram of an embodiment of the rapid-adhesion double-sided adhesive tape of the application. In the diagram, 1 is a release layer, 2 is a first adhesive layer, 3 is a carrier layer, and 4 is a second adhesive layer.
[0032] The application will be further described in detail below in combination with the drawings and specific embodiments. DETAILED DESCRIPTION
[0033] As shown in Figure 1 , the embodiment of the application provides a rapid-adhesion double-sided adhesive tape, which comprises a carrier layer 3 and a first adhesive layer 2 and a second adhesive layer 4 respectively arranged on both sides of the carrier layer 3, and the carrier layer 3 can play a reinforcing role. The outer side of the first adhesive layer 2 or the second adhesive layer 4 away from the carrier layer 3 can be provided with a release layer 1, and the release layer 1 can be release paper, which is convenient for adhesive tape winding.
[0034] The first adhesive layer 2 and the second adhesive layer 4 respectively comprise the following components in mass percentage: 80wt%-93wt% of an acrylate pressure-sensitive adhesive, 5wt%-15wt% of a first tackifying resin, and 2wt%-5wt% of an interface modifier. The compositions of the first adhesive layer 2 and the second adhesive layer 4 can be the same or different, and are preferably the same, which is convenient for adhesive preparation. Relative to a total mass of 100%, the acrylate pressure-sensitive adhesive can be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, etc.; the mass of the first tackifying resin can be 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, etc.; and the interface modifier can be 2%, 3%, 4%, 5%, etc.
[0035] The acrylate pressure-sensitive adhesive has a solid content of 50wt%-60wt%, a glass transition temperature of-45℃--35℃, and a molecular weight distribution of 1-1.5, is prepared by a solution or emulsion polymerization method, and has a molecular weight distribution index PDI strictly controlled in the range of 1-1.5, so as to ensure that the adhesive has both low-temperature flexibility and high-temperature anti-creep performance.
[0036] The interface modifier is a nano-dispersion system of a silane coupling agent with amino groups pre-dispersed in an ethanol / water mixed solvent. The interface modifier is mixed with the acrylate pressure-sensitive adhesive and the first tackifying resin. The silane coupling agent with amino groups and the dispersion system and the mixing method can form a gradient distribution of the anchoring network at the interface between the adhesive layer and the substrate, and the silane coupling agent with amino groups can be enriched at the interface between the adhesive layer and the carrier layer or the adhesive layer and the foaming material, thereby improving the wetting ability of the adhesive tape on the low surface energy material and reducing the bonding time, so as to realize the quick bonding function.
[0037] In some examples, the silane coupling agent with amino groups is γ-aminopropyl triethoxysilane (KH550) or N-β-aminoethyl-γ-aminopropyl trimethoxysilane (KH-792), which can be purchased.
[0038] In some examples, the volume ratio of ethanol to water in the ethanol / water mixed solvent is 3:1, which is conducive to the dispersion of the silane coupling agent with amino groups. In some examples, the mass ratio of the silane coupling agent with amino groups to the ethanol / water mixed solvent is 1:(1~10), for example, 1:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, etc.
[0039] In some examples, the first tackifying resin is a terpene phenolic resin or a hydrogenated rosin glyceride, the softening point of the terpene phenolic resin is between 105°C and 120°C, and the acid value of the hydrogenated rosin glyceride is <15 mgKOH / g. The use of the above tackifying resin can reduce the loss factor tanδ of the adhesive layer in a 60°C environment and improve the long-term stability of the adhesive layer under complex working conditions.
[0040] In some examples, the carrier layer is a non-woven fabric or a PET film, and the carrier layer is subjected to corona treatment or plasma activation. The power of the corona treatment is 3kW~5kW, and the linear speed is 10m / min~20m / min. The gas flow of the plasma activation is 10L / h~30L / h, and the processing time is 30s~60s. After the above treatment, the spreading time of the acrylate adhesive solution on the carrier layer 3 can be shortened, and the processing efficiency can be improved.
[0041] In some examples, the surface energy of the carrier layer is 45mN / m~55mN / m, the water contact angle is 30° or less, and the surface roughness Ra is between 0.8μm and 1.2μm, which further shortens the spreading time and improves the processing efficiency.
[0042] In some examples, the plasma activation is performed using argon / oxygen mixed gas, and the volume ratio of argon to oxygen is 4:1, which further shortens the spreading time and improves the processing efficiency.
[0043] In some examples, the acrylate pressure-sensitive adhesive is made from raw materials including the following components by mass fraction: soft monomer 70-100 parts; hard monomer 28-30 parts; functional monomer 4-6 parts; initiator 0.1-0.5 parts; solvent 100 parts; second tackifying resin 5-20 parts; crosslinking agent 1-5 parts; auxiliary agent 0-2 parts. Among them, the soft monomer can provide adhesion and flexibility, the hard monomer can improve cohesion and heat resistance, the functional monomer can introduce crosslinking sites and polarity, the tackifying resin can improve the initial adhesion and peel force, the crosslinking agent can improve the heat resistance and cohesion, and the auxiliary agent can provide antioxidant properties or flexibility, etc.
[0044] In some examples, the soft monomer can be 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 parts, 77 parts, 78 parts, 79 parts, 80 parts, 81 parts, 82 parts, 83 parts, 84 parts, 85 parts, 86 parts, 87 parts, 88 parts, 89 parts, 90 parts, 91 parts, 92 parts, 93 parts, 94 parts, 95 parts, 96 parts, 97 parts, 98 parts, 99 parts, 100 parts, etc., relative to 100 parts of solvent; the hard monomer can be 28 parts, 29 parts, 30 parts, etc.; the functional monomer can be 4 parts, 5 parts, 6 parts, etc.; the initiator can be 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, etc.; the second tackifying resin can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.; the crosslinking agent can be 1 parts, 2 parts, 3 parts, 4 parts, 5 parts; the auxiliary agent can be 0 parts, 0.5 parts, 1 parts, 1.5 parts, 2 parts, etc.
[0045] In some examples, the soft monomer is a mixture of butyl acrylate and 2-ethylhexyl acrylate; the mass ratio of butyl acrylate to 2-ethylhexyl acrylate is (65-94):5, and 2-ethylhexyl acrylate can improve low-temperature performance.
[0046] In some examples, the hard monomer is a mixture of methyl methacrylate and vinyl acetate, and the mass ratio of methyl methacrylate to vinyl acetate is (0.5-2):1, and vinyl acetate partially replaces methyl methacrylate, which can improve the performance of the adhesive tape.
[0047] In some examples, the functional monomer is a mixture of acrylic acid and hydroxyethyl acrylate, and the mass ratio of acrylic acid to hydroxyethyl acrylate is (4-5):0.5, and acrylic acid can enhance adhesion and reactivity, and hydroxyethyl acrylate contains hydroxyl groups to promote crosslinking.
[0048] In some examples, the initiator is at least one of azobisisobutyronitrile and azobis(2-methylbutyronitrile), and the above initiator can react at 80-95℃.
[0049] In some examples, the solvent is ethyl acetate, which can well dissolve the monomers and the resin.
[0050] In some examples, the second tackifying resin is at least one of rosin, terpene resin, petroleum resin, which can improve the initial tack and the peel force.
[0051] In some examples, the crosslinking agent is a multi-epoxy compound or a multi-functional acrylate, which can improve the strength of the adhesive tape.
[0052] In some examples, the auxiliary agent is at least one of an antioxidant and a plasticizer, which can adjust the flexibility of the adhesive tape.
[0053] In some examples, the preparation method of the acrylate pressure-sensitive adhesive comprises dissolving soft monomers, hard monomers, functional monomers, and initiators in a solvent, adding the soft monomers, hard monomers, functional monomers, and initiators in batches for polymerization, for example, the soft monomers can be polymerized first, and then the hard monomers are added dropwise, and the reaction is carried out after heat preservation; or a batch adding initiator process is adopted, part of the initiator and part of the monomers are added for free heat release reaction, and then the remaining monomers and initiators are added dropwise; after the polymerization is completed, the second tackifying resin is added to significantly improve the adhesion, and if necessary, the auxiliary agent is added, and finally the crosslinking agent is added, and the mixture is stirred uniformly to obtain the acrylate pressure-sensitive adhesive.
[0054] In some examples, the preparation method of the above-mentioned quick-sticking double-sided adhesive tape comprises the following steps: using a comma doctor blade and a micro-gravure combined coating system to coat the wet adhesive of the first adhesive layer and the second adhesive layer on both sides of the carrier layer, the thickness of the wet adhesive is accurately controlled to be between 80 μm and 120 μm, the coating amount is between 30 g / m² and 50 g / m², the coating speed is between 5 m / min and 15 m / min, the coating gap control precision is ± 5 μm, the environmental humidity is maintained at 45%-55% RH, the coating uniformity CV value is ≤3.5%, which is 1.8 times higher than that of the traditional process, and the online laser thickness gauge and the PID closed-loop control system can be used; after coating, the wet adhesive is gradiently heated, dried, solidified, and aged.
[0055] The technical solutions of the present application will be further described in detail through specific examples.
[0056] Example 1 The preparation steps of the adhesive of the present example include: In the reactor, butyl acrylate (BA) 65 parts, 2-ethylhexyl acrylate (2-EHA) 5 parts, azobisisobutyronitrile (AIBN) 0.3 parts, solvent ethyl acetate 50 parts were added, and polymerization was initiated at 85°C. After 3h of reaction, methyl methacrylate (MMA) 25 parts, vinyl acetate (VAc) 3 parts, acrylic acid (AA) 4.5 parts, hydroxyethyl acrylate (HEA) 0.5 parts, azobisisobutyronitrile (AIBN) 0.2 parts, solvent ethyl acetate 50 parts were added, and polymerization was continued at 85°C. After the reaction was completed, petroleum resin 15 parts, crosslinking agent multifunctional acrylate 2 parts were added, and stirred uniformly to obtain an acrylate pressure-sensitive adhesive.
[0057] γ-aminopropyl triethoxysilane (KH550) was pre-dispersed in an ethanol / water (3:1) mixed solvent, ultrasonically dispersed to form a nanoscale dispersion system. The mass ratio of γ-aminopropyl triethoxysilane (KH550) to ethanol / water (3:1) mixed solvent was 1:5.
[0058] 80wt% of the obtained acrylate pressure-sensitive adhesive, 15wt% of terpene phenolic resin (softening point about 110°C), and 5wt% of interfacial modifier were mixed uniformly to obtain an adhesive mixture.
[0059] The preparation steps of the instant adhesive tape are as follows: Step one: PET film was used as the carrier, and argon / oxygen (volume ratio 4:1) mixed gas was used for plasma activation, with a gas flow of 20L / h and a treatment time of 40s. After treatment, the surface energy of the carrier was improved to 50mN / m, the contact angle was optimized to 25°, and the surface roughness Ra value was accurately controlled to 0.8μm. This combination of parameters can shorten the spreading time of the acrylate adhesive solution on the substrate to less than 0.8 seconds, with an efficiency improvement of more than 60% compared to conventional treatment.
[0060] Step two: a comma doctor blade and micro-gravure combined coating system was used to coat the wet adhesive thickness accurately to 100μm, with a coating amount of 40g / m², a coating speed of 10m / min, and a coating gap control accuracy of ±5μm. The environmental humidity was strictly maintained at 50%RH. Through the online laser thickness gauge and PID closed-loop control system, the coating uniformity CV value was ≤3.5%, which was 1.8 times higher than that of the traditional process.
[0061] Step three: after coating, the wet adhesive was kept at 50°C for 1h, 70°C for 1h, and 90°C for 1h for drying, curing and aging. The loss factor tanδ of the obtained adhesive layer in a 60°C environment was 0.30. Atomic force microscopy (AFM) characterization showed that the silane coupling agent with amino groups was gradiently distributed at the interface of the adhesive layer, and the more silane coupling agent was closer to the interface.
[0062] The obtained adhesive tape is adhered to PE foam (surface energy less than 35 mN / m), and the effective bonding time is shortened to less than 30 s.
[0063] Example 2 The preparation steps of the adhesive of the present example include: In a reactor, 80 parts of butyl acrylate (BA), 5 parts of 2-ethylhexyl acrylate (2-EHA), 0.2 parts of azobisisobutyronitrile (AIBN), and 50 parts of solvent ethyl acetate are added, and polymerization is initiated at 85°C. After 3h of reaction, 23 parts of methyl methacrylate (MMA), 7 parts of vinyl acetate (VAc), 5 parts of acrylic acid (AA), 0.5 parts of hydroxyethyl acrylate (HEA), 0.3 parts of azobisisobutyronitrile (AIBN), and 50 parts of solvent ethyl acetate are added, and polymerization is continued at 85°C. After the reaction is completed, 20 parts of rosin resin and 2 parts of crosslinking agent polycyclic epoxy compound are added and stirred uniformly to obtain an acrylate pressure-sensitive adhesive.
[0064] N-β-aminoethyl-γ-aminopropyltrimethoxysilane (KH792) is pre-dispersed in an ethanol / water (3:1) mixed solvent, ultrasonically dispersed, and a nanoscale dispersion system is formed. The mass ratio of γ-aminopropyltriethoxysilane (KH550) to the ethanol / water (3:1) mixed solvent is 1:3.
[0065] The obtained acrylate pressure-sensitive adhesive, 90wt%, terpene phenolic resin (softening point about 110°C), 8wt%, and interfacial modifier, 2wt%, are uniformly mixed to obtain an adhesive mixture.
[0066] The preparation steps of the instant adhesive tape are as follows: Step one: PET film is used as the carrier, and argon / oxygen (volume ratio 4:1) mixed gas is used for plasma activation, with a gas flow rate of 20 L / h and a treatment time of 40 s. After treatment, the surface energy of the carrier is increased to 50 mN / m, the contact angle is optimized to 25°, and the surface roughness Ra value is accurately controlled to 0.8 μm.
[0067] Step two: a comma doctor blade and micro-gravure combined coating system is used, the wet adhesive thickness is accurately controlled at 100 μm, the coating amount is 40 g / m², the coating speed is 10 m / min, the coating gap control precision is ±5 μm, and the environmental humidity is strictly maintained at 50% RH. Through the online laser thickness gauge and PID closed-loop control system, the coating uniformity CV value is ≤3.5%, which is 1.8 times higher than that of the traditional process.
[0068] Step three: after coating, the wet adhesive is dried and cured and aged at 50°C for 1 h, 70°C for 1 h, and 90°C for 1 h. The loss factor tan δ of the obtained adhesive layer in a 60°C environment is 0.35.
[0069] The obtained adhesive tape was adhered to PE foam (surface energy less than 35 mN / m), and the effective bonding formation time was shortened to less than 30 s.
[0070] Comparative Example 1 The preparation method of the adhesive tape of the present comparative example was basically the same as that of Example 2, except that N-β-aminoethyl-γ-aminopropyl trimethoxysilane (KH792) was replaced by KH560. The obtained adhesive tape was adhered to PE foam (surface energy less than 35 mN / m), and the effective bonding formation time was about 2 min.
[0071] Finally, it should be emphasized that the above description is only the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A quick-stick double-sided tape, characterized by The carrier layer and the first and second adhesive layers respectively arranged on both sides of the carrier layer; The first and second adhesive layers respectively comprise the following components by mass percentage: 80wt%-93wt% acrylate pressure-sensitive adhesive, 5wt%-15wt% first tackifying resin, and 2wt%-5wt% interface modifier; The acrylate pressure-sensitive adhesive has a solid content of 50wt%-60wt%, a glass transition temperature of-45℃--35℃, and a molecular weight distribution of 1-1.5; The interface modifier is a nanoscale dispersion system of a silane coupling agent with amino groups pre-dispersed in an ethanol / water mixed solvent, and the interface modifier is mixed with the acrylate pressure-sensitive adhesive and the first tackifying resin.
2. The instant adhesive double-coated tape according to claim 1, wherein The silane coupling agent with amino groups is γ-aminopropyl triethoxysilane or N-β-aminoethyl-γ-aminopropyl trimethoxysilane; The volume ratio of ethanol to water in the ethanol / water mixed solvent is 3:1; The mass ratio of the silane coupling agent with amino groups to the ethanol / water mixed solvent is 1:(1-10).
3. The instant adhesive double-coated tape according to claim 1, wherein The first tackifying resin is terpene phenolic resin or hydrogenated rosin glyceride; The softening point of the terpene phenolic resin is 105℃-120℃; The acid value of the hydrogenated rosin glyceride is <15mgKOH / g.
4. The instant adhesive double-coated tape according to any one of claims 1 to 3, characterized in that The carrier layer is non-woven fabric or PET film, and the carrier layer is subjected to corona treatment or plasma activation; the power of the corona treatment is 3kW-5kW, and the linear speed is 10m / min-20m / min; the gas flow of the plasma activation is 10L / h-30L / h, and the processing time is 30s-60s; And / or, the surface energy of the carrier layer is 45mN / m-55mN / m, the water contact angle is below 30°, and the surface roughness Ra is 0.8μm-1.2μm.
5. The instant adhesive double-coated tape according to claim 4, wherein The plasma activation is performed using argon / oxygen mixed gas, and the volume ratio of argon to oxygen is 4:
1.
6. The instant adhesive double-coated tape according to any one of claims 1 to 3, wherein The acrylate pressure-sensitive adhesive is made from raw materials comprising the following components by mass: soft monomer 70-100 parts; hard monomer 28-30 parts; functional monomer 4-6 parts; initiator 0.1-0.5 parts; solvent 100 parts; second tackifying resin 5-20 parts; crosslinking agent 1-5 parts; and auxiliary agent 0-2 parts.
7. The instant adhesive double-coated tape according to claim 6, wherein The soft monomer is a mixture of butyl acrylate and 2-ethylhexyl acrylate, and the mass ratio of butyl acrylate to 2-ethylhexyl acrylate is (65-94):5; The hard monomer is a mixture of methyl methacrylate and vinyl acetate, and the mass ratio of methyl methacrylate to vinyl acetate is (0.5-2):1; The functional monomer is a mixture of acrylic acid and hydroxyethyl acrylate, and the mass ratio of acrylic acid to hydroxyethyl acrylate is (4-5):0.5; The initiator is at least one of azobis isobutyronitrile and azobis (2-methylbutyronitrile); The solvent is ethyl acetate; The second tackifying resin is at least one of rosin, terpene resin, and petroleum resin; The crosslinking agent is a multi-epoxy compound or a multi-functionality acrylate. The auxiliary agent is at least one of an antioxidant and a plasticizer.
8. The instant adhesive double-coated tape according to claim 6, wherein The preparation method of the acrylate pressure-sensitive adhesive comprises adding the soft monomer, the hard monomer, the functional monomer, the initiator and the solvent into a polymerization reactor in batches; After the polymerization is completed, a second tackifying resin and an auxiliary agent are added, and finally a crosslinking agent is added and stirred and mixed uniformly.
9. The instant-adhesive double-coated tape according to any one of claims 1 to 3, characterized in that A release layer is further included, which is arranged on a side of the first adhesive layer or the second adhesive layer away from the carrier layer.
10. The method of claim 1 to 9, characterized in that The method comprises the following steps: A comma doctor blade and microgravure combined coating system is used to coat the wet adhesive of the first adhesive layer and the second adhesive layer on both sides of the carrier layer, the thickness of the wet adhesive is accurately controlled to be between 80 μm and 120 μm, the coating amount is between 30 g / m² and 50 g / m², the coating speed is between 5 m / min and 15 m / min, the coating gap control precision is ± 5 μm, the environmental humidity is maintained at 45%-55% RH, and the coating uniformity CV value is ≤3.5%; After coating, the wet adhesive is gradiently warmed, dried, cured and aged.