Preparation method of wear-resistant cloth adhesive tape

Abstract

The invention belongs to the field of adhesive tape preparation, and relates to a preparation method of a wear-resistant cloth adhesive tape, which comprises the following steps: carrying out nuclear layer polymerization reaction on ethylene and vinyl acetate under the action of an initiator; the preparation method comprises the following steps: carrying out shell polymerization reaction on ethylene and butyl acrylate as well as diacetone acrylamide and vinyl acetate under the action of an initiator, and adding a chain transfer agent and adipic dihydrazide to obtain an ethylene-vinyl acetate copolymer core-shell emulsion; nano aluminum oxide is modified by a silane coupling agent and polyethylene glycol in an ethanol aqueous solution to obtain modified nano aluminum oxide, and the modified nano aluminum oxide is blended with a graphene / silver nanoparticle compound, nano zinc oxide, nano silicon dioxide and a polyester plasticizer to obtain the multifunctional after-finishing agent. After the cotton / polyester blended fabric is pretreated, the cotton / polyester blended fabric is coated with the ethylene-vinyl acetate copolymer core-shell emulsion, the aramid fiber non-woven fabric is attached to the cotton / polyester blended fabric, the aramid fiber non-woven fabric is subjected to compression roller compounding and drying, then the multifunctional after-finishing agent is coated for micro-imprinting, and the wear-resistant cloth adhesive tape is obtained through after-treatment, so that the wear-resistant service life of the adhesive tape is remarkably prolonged.

Description

Technical Field

[0001] This invention belongs to the field of tape preparation technology, specifically relating to a method for preparing abrasion-resistant fabric tape. Background Technology

[0002] In numerous fields such as industrial production, electronic equipment manufacturing, and smart wearables, adhesive tape, as a key material that combines adhesion, protection, and functional conduction, directly impacts the reliability and lifespan of related products. With the increasing demands of modern industry for equipment operational stability, electronic device integration, and intelligent sensing accuracy, traditional adhesive tape has gradually revealed several performance shortcomings: On the one hand, under long-term friction, high-frequency vibration, or harsh environments, its insufficient wear resistance easily leads to substrate damage and functional layer failure, significantly shortening its lifespan; on the other hand, some applications have specific requirements for the conductivity and triboelectric effect response sensitivity of the adhesive tape, while existing products often struggle to simultaneously achieve synergistic optimization of wear resistance, conductivity, and triboelectric performance. Specifically, the wear-resistant layer of traditional adhesive tape often uses a single polymer material, resulting in limited surface scratch resistance and susceptibility to cracking or wear under mechanical stress; the conductive layer often relies on metal foil or ordinary conductive paste, exhibiting problems such as uneven conductivity and weak adhesion to the substrate; and insufficient material matching and interface stability of the triboelectric layer leads to low charge output efficiency and rapid performance degradation. Furthermore, in the existing manufacturing process of multi-layered fabric tapes, the poor compatibility and insufficient molding stability between functional layers further limit the improvement of their overall performance. Chinese patent application CN118620540A discloses a fabric-based waterproof tape and its preparation method. Its technical solution focuses on waterproof performance, primarily addressing the problems of poor waterproofing and insufficient water resistance of fabric-based tapes, but it does not solve the problem of insufficient abrasion resistance.

[0003] To meet the composite performance requirements of "high wear resistance, high conductivity, and high triboelectric response" for cloth tapes in high-end manufacturing, developing a wear-resistant cloth tape through multi-functional layer synergistic design, the adoption of a novel nanocomposite system, and precise process control has become a key direction for solving current technical bottlenecks. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention discloses a method for preparing abrasion-resistant fabric tape, comprising: preparing an ethylene-vinyl acetate copolymer emulsion, wherein the core layer is the reaction of ethylene and vinyl acetate under the initiation of ammonium persulfate; adding a mixture of butyl acrylate, diacetone acrylamide and vinyl acetate to the shell layer, and adding dodecyl mercaptan and adipate dihydrazide for polymerization reaction; after the nano-alumina is modified with silane coupling agent and polyethylene glycol, it is mixed with graphene / silver nanoparticle composite, nano-zinc oxide and other materials in proportion to obtain a multifunctional finishing agent; during composite molding, after the cotton / polyester blended fabric is pretreated, the ethylene-vinyl acetate copolymer emulsion is coated, and then aramid nonwoven fabric is laminated with a pressure roller; after drying, the multifunctional finishing agent is coated again; and abrasion-resistant fabric tape is obtained by micro-embossing and post-treatment.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides a method for preparing abrasion-resistant fabric tape, comprising the following steps:

[0007] Ethylene and vinyl acetate undergo core-shell polymerization under the action of an initiator; ethylene, butyl acrylate, diacetone acrylamide, and vinyl acetate undergo shell-shell polymerization under the action of an initiator, and a chain transfer agent and adipate dihydrazide are added to obtain an ethylene-vinyl acetate copolymer core-shell emulsion.

[0008] Modified nano-alumina was obtained by modifying nano-alumina in an ethanol aqueous solution with silane coupling agent and polyethylene glycol. The modified nano-alumina was then formulated with graphene / silver nanoparticle composite, nano-zinc oxide, nano-silica, and polyester plasticizer to obtain a multifunctional finishing agent.

[0009] After pretreatment of cotton / polyester blended fabric, an ethylene-vinyl acetate copolymer core-shell emulsion is coated, laminated with aramid nonwoven fabric, dried by roller pressing, coated with a multifunctional finishing agent and micro-embossed, and then post-treated to obtain a wear-resistant fabric tape.

[0010] Preferably, in the core-layer polymerization reaction, the reaction temperature of ethylene and vinyl acetate is 50-60℃, the reaction time is 1-2h, and the mass ratio of ethylene to vinyl acetate is (1-2):1.

[0011] Preferably, the shell polymerization reaction is carried out at 70-80°C and 2.5-3.0 MPa, and the mass ratio of vinyl acetate, butyl acrylate, diacetone acrylamide and ethylene is (40-65):(2-5):1:(12-28).

[0012] Preferably, the initiator is ammonium persulfate, and the amount of ammonium persulfate is 0.5-0.8% of the total monomer mass; the chain transfer agent is dodecyl mercaptan, and the amount of dodecyl mercaptan is 0.1%-0.5% of the total monomer mass; the mass ratio of diacetone acrylamide to adipate dihydrazide is 1:(0.8-1).

[0013] Preferably, the mass ratio of the nano-alumina, silane coupling agent, polyethylene glycol, and ethanol aqueous solution is 10:1:2:90, wherein the volume ratio of ethanol to water in the ethanol aqueous solution is 1:1.

[0014] Preferably, the mass ratio of the modified nano-alumina, graphene and / or silver nanoparticle composite, nano-zinc oxide, nano-silica, and polyester plasticizer is (10-15):(1-2):3:1:(4-5).

[0015] Preferably, the graphene / silver nanoparticle composite is prepared as follows: graphene oxide is dispersed in deionized water, ultrasonically treated for 0.5-1 h, then 0.1 mol / L silver nitrate solution is added, followed by dropwise addition of 0.1 mol / L sodium borohydride solution until the solution turns grayish-black, reacted at 50-60℃ for 1-2 h, and obtained by centrifugation and washing. The mass ratio of graphene oxide, silver nitrate and sodium borohydride is 86:29:1.

[0016] Preferably, the pretreatment of the cotton / polyester blended fabric includes: the cotton / polyester blended fabric is treated with sodium hydroxide solution, then washed and dried, wherein the mass fraction of the sodium hydroxide solution is 10%.

[0017] Preferably, the coating thickness of the ethylene-vinyl acetate copolymer core-shell emulsion is 60-70 μm, and the pressure of the roller composite is 0.3-0.5 MPa.

[0018] Preferably, the drying temperature is 80-90℃ and the drying time is 5-6 minutes.

[0019] Beneficial technical effects:

[0020] In the preparation of the ethylene-vinyl acetate copolymer core-shell emulsion, the diacetone acrylamide and adipate dihydrazide in the shell layer undergo hydrazone crosslinking during drying, enhancing the bonding strength and weather resistance of the ethylene-vinyl acetate copolymer core-shell emulsion. During composite molding, a roller pressure of 0.3-0.5 MPa promotes the full spreading of the ethylene-vinyl acetate copolymer core-shell emulsion between the base fabric and the aramid nonwoven fabric, eliminating interfacial air and allowing the crosslinked ethylene-vinyl acetate copolymer core-shell film to be tightly bonded to the aramid fibers through polar interactions, preventing interlayer delamination of the tape under stress. The nano-alumina in the multifunctional finishing agent, after being modified with a silane coupling agent, introduces organic groups on its surface, which can undergo a coupling reaction with the ester groups in the ethylene-vinyl acetate copolymer core-shell emulsion. Polyethylene glycol modification further improves its dispersibility on the surface of the ethylene-vinyl acetate copolymer core-shell film. The interfacial chemical bonding of the coupling reaction enables the nano-alumina to be uniformly anchored on the surface of the ethylene-vinyl acetate copolymer core-shell film, avoiding the performance fluctuations caused by the agglomeration of nanoparticles in traditional coatings. At the same time, the polyester plasticizer has a similar ester group structure to the ethylene-vinyl acetate copolymer core-shell emulsion, and can enhance the compatibility between the multifunctional finishing agent and the ethylene-vinyl acetate copolymer core-shell layer through molecular chain entanglement, ensuring the continuity of the coating. The cross-linked structure of the ethylene-vinyl acetate copolymer core-shell emulsion provides a rigid substrate for the multifunctional finishing agent. Meanwhile, the nanoparticles in the finishing agent, through a dispersion reinforcement mechanism, form a harder, more wear-resistant layer on the tape surface. When the tape is subjected to friction, the hard particles preferentially bear the load, reducing direct wear on the ethylene-vinyl acetate copolymer core-shell substrate. The layered structure of the graphene / silver nanoparticle composite forms a physical barrier in the coating, preventing wear particles from penetrating inward. Furthermore, the flexibility of the ethylene-vinyl acetate copolymer core layer buffers the impact stress generated by friction, preventing the wear-resistant layer from cracking due to excessive brittleness. Together, these elements form a wear-resistant system with a hard surface layer and a flexible substrate, significantly improving the wear life of the tape. Attached Figure Description

[0021] Figure 1 This is a physical image of a wear-resistant cloth tape product prepared in Example 1.

[0022] Figure 2 This is a picture of a wear-resistant cloth tape product prepared in Example 2.

[0023] Figure 3 This is a schematic diagram of the cross-linking reaction between diacetone acrylamide and adipate dihydrazide. Detailed Implementation

[0024] To make the technical problems, solutions, and beneficial effects of this application clearer, the following detailed description is provided in conjunction with embodiments. However, this should not be construed as limiting the scope of this application to the following embodiments. All other embodiments obtained by those skilled in the art without creative effort, without departing from the above-described methodological spirit, are within the scope of protection of this application.

[0025] In this application, the terminology used is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0026] The singular forms “for,” “a,” “any one,” and “as described” used in this application are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] Furthermore, the terms "first" and "second" appearing in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] The following describes in detail, with reference to different embodiments, a method for preparing abrasion-resistant cloth tape provided in this application.

[0029] Example 1

[0030] A method for preparing abrasion-resistant fabric tape includes the following steps:

[0031] 1. Preparation of ethylene-vinyl acetate copolymer core-shell emulsion

[0032] 1.1. Core-layer polymerization

[0033] Deionized water was added to the reactor, and the stirring speed was set to 300 r / min. Nitrogen gas was purged three times to remove air, and vinyl acetate (VAc) monomer was added. The temperature was raised to 50°C, and ethylene was introduced until the pressure inside the reactor reached 1.5 MPa. Ammonium persulfate (40% of the total amount) was added as initiator, with a mass ratio of ethylene to vinyl acetate of 1.5:1. The reaction was maintained at 55°C and 1.8 MPa for 1.5 h to form a high-ethylene content core layer.

[0034] 1.2. Shell polymerization

[0035] The remaining ammonium persulfate initiator (60% of the total amount) was dissolved in deionized water. A mixture of butyl acrylate, diacetone acrylamide, and vinyl acetate monomers was added dropwise to the reactor over 1.5 hours using a constant-pressure dropping funnel. During the addition, the temperature was gradually increased to 75°C, and ethylene was continuously introduced to maintain a pressure of 2.8 MPa. The mass ratio of vinyl acetate, butyl acrylate, diacetone acrylamide, and ethylene was 50:3:1:20. Dodecyl mercaptan, a chain transfer agent, was added simultaneously. After the addition was complete, the reaction was maintained at this temperature for 1.5 hours, then cooled to below 40°C, and the pressure was reduced before discharging to obtain an emulsion. Adipate dihydrazide was dissolved in deionized water to form an aqueous solution of adipate dihydrazide. The mass ratio of diacetone acrylamide to adipate dihydrazide was 1:0.9. The aqueous solution of adipate dihydrazide was slowly added dropwise to the emulsion at 70°C and 250 rpm with stirring. The mixture was filtered to obtain an ethylene-vinyl acetate copolymer core-shell emulsion with a solid content of 45%. A schematic diagram of the crosslinking reaction between diacetone acrylamide and adipate dihydrazide is shown below. Figure 3 As shown.

[0036] The total amount of ammonium persulfate is 0.5% of the total monomer mass, and the amount of dodecyl mercaptan is 0.1% of the total monomer mass.

[0037] 2. Compound formulation of multifunctional finishing agents

[0038] 2.1. Surface modification of nano-alumina

[0039] Nano-alumina (50 nm particle size) was placed in a plasma treatment instrument (250 W, argon atmosphere) and treated for 5 min. An ethanol-water solution (ethanol to water volume ratio 1:1) was added, and the mixture was ultrasonically dispersed for 25 min. A silane coupling agent, KH550, was added, and the mixture was stirred at 55 °C for 1.5 h. Polyethylene glycol (PEG-400) was added, and the pH was adjusted to 7.3. The reaction was continued for 1.5 h. After centrifugation and drying, the modified nano-alumina was obtained for later use. The mass ratio of nano-alumina, silane coupling agent KH550, polyethylene glycol, and ethanol-water solution was 10:1:2:90.

[0040] 2.2. Preparation of graphene / silver nanoparticle composites

[0041] Graphene oxide was dispersed in deionized water and sonicated for 0.8 h. Silver nitrate solution (0.1 mol / L) was then added, followed by dropwise addition of 0.1 mol / L sodium borohydride solution until the solution turned grayish-black. The reaction was carried out at 55 °C for 1.5 h. After centrifugation and washing, a graphene / silver nanoparticle composite was obtained. The mass ratio of graphene oxide, silver nitrate, and sodium borohydride was 86:29:1.

[0042] 2.3. Blending of Composite Systems

[0043] Modified nano-alumina, graphene / silver nanoparticle composite, nano-zinc oxide (30 nm), and nano-silica (20 nm) were pre-dispersed in deionized water and ultrasonically dispersed for 15 min. Then, a polyester plasticizer was added, and the mixture was stirred at high speed (1500 r / min) for 25 min to obtain a multifunctional finishing agent with a solid content of 35%. The mass ratio of the modified nano-alumina, graphene / silver nanoparticle composite, nano-zinc oxide, nano-silica, and polyester plasticizer was 12:1.5:3:1:4.5, and the mass ratio of graphene to silver nanoparticles in the graphene / silver nanoparticle composite was 86:18.

[0044] 3. Composite molding of wear-resistant fabric tape

[0045] 3.1. Base Fabric Pretreatment

[0046] The cotton / polyester blended fabric is treated with 10% sodium hydroxide solution at 55℃ for 25 minutes, washed with water until neutral, and dried for later use.

[0047] 3.2. Coating Composite Process

[0048] A base fabric is coated with an ethylene-vinyl acetate copolymer core-shell emulsion (65 μm thick), laminated with an aramid nonwoven fabric, and then rolled together using a pressure roller (0.4 MPa) and dried at 85°C for 5.5 min. A multifunctional finishing agent is then coated onto the surface of the composite fabric (aramid nonwoven fabric side), and the two fabrics are pressed together using a micro-embossing roller.

[0049] 3.3. Post-processing

[0050] The finished product is placed in an environment of 25℃ and 60% relative humidity for 48 hours, then cut into 25mm wide rolls to obtain abrasion-resistant fabric tape. Figure 1 As shown.

[0051] Example 2

[0052] A method for preparing abrasion-resistant fabric tape includes the following steps:

[0053] 1. Preparation of ethylene-vinyl acetate copolymer core-shell emulsion

[0054] 1.1. Core-layer polymerization

[0055] Deionized water was added to the reactor, and the stirring speed was set to 300 r / min. Nitrogen gas was purged three times to remove air, and vinyl acetate (VAc) monomer was added. The temperature was raised to 50°C, and ethylene was introduced until the pressure inside the reactor reached 1.5 MPa. Ammonium persulfate (40% of the total amount) was added as the initiator, with a mass ratio of ethylene to vinyl acetate of 1:1. The reaction was maintained at 50°C and 1.5 MPa for 1 hour to form a high-ethylene content core layer.

[0056] 1.2. Shell polymerization

[0057] The remaining ammonium persulfate initiator (60% of the total amount) was dissolved in deionized water. A mixture of butyl acrylate, diacetone acrylamide, and vinyl acetate monomers was added dropwise to the reactor over 1 hour using a constant-pressure dropping funnel. During the addition, the temperature was gradually increased to 70°C, and ethylene was continuously introduced to maintain a pressure of 2.5 MPa. The mass ratio of vinyl acetate, butyl acrylate, diacetone acrylamide, and ethylene was 40:2:1:12. Dodecyl mercaptan, a chain transfer agent, was added simultaneously. After the addition was complete, the reaction was maintained at this temperature for 1 hour, then cooled to below 40°C, and the pressure was reduced before discharging to obtain an emulsion. Adipate dihydrazide was dissolved in deionized water to form an aqueous solution of adipate dihydrazide. The mass ratio of diacetone acrylamide to adipate dihydrazide was 1:0.8. The aqueous solution of adipate dihydrazide was slowly added dropwise to the emulsion at 80°C and 200 rpm with stirring. The mixture was filtered to obtain an ethylene-vinyl acetate copolymer core-shell emulsion with a solid content of 43%. A schematic diagram of the crosslinking reaction between diacetone acrylamide and adipate dihydrazide is shown below. Figure 3 As shown.

[0058] The total amount of ammonium persulfate is 0.6% of the total monomer mass, and the amount of dodecyl mercaptan is 0.3% of the total monomer mass.

[0059] 2. Compound formulation of multifunctional finishing agents

[0060] 2.1. Surface modification of nano-alumina

[0061] Nano-alumina (50 nm particle size) was placed in a plasma treatment instrument (200 W power, argon atmosphere) and treated for 5 min. An ethanol-water solution (ethanol to water volume ratio 1:1) was added, and the mixture was ultrasonically dispersed for 20 min. Then, silane coupling agent KH550 was added, and the mixture was stirred at 50 °C for 1 h. Polyethylene glycol (PEG-400) was added, and the pH was adjusted to 7.0. The reaction was continued for 1 h. After centrifugation and drying, the modified nano-alumina was obtained for later use. The mass ratio of nano-alumina, silane coupling agent KH550, polyethylene glycol, and ethanol-water solution was 10:1:2:90.

[0062] 2.2. Preparation of graphene / silver nanoparticle composites

[0063] Graphene oxide was dispersed in deionized water and sonicated for 0.5 h. Silver nitrate solution (0.1 mol / L) was then added, followed by dropwise addition of 0.1 mol / L sodium borohydride solution until the solution turned grayish-black. The reaction was carried out at 50 °C for 1 h. After centrifugation and washing, a graphene / silver nanoparticle composite was obtained. The mass ratio of graphene oxide, silver nitrate, and sodium borohydride was 86:29:1.

[0064] 2.3. Blending of Composite Systems

[0065] Modified nano-alumina, graphene / silver nanoparticle composite, nano-zinc oxide (30 nm), and nano-silica (20 nm) were pre-dispersed in deionized water and ultrasonically dispersed for 10 min. Then, a polyester plasticizer was added, and the mixture was stirred at high speed (1500 r / min) for 20 min to obtain a multifunctional finishing agent with a solid content of 30%. The mass ratio of the modified nano-alumina, graphene / silver nanoparticle composite, nano-zinc oxide, nano-silica, and polyester plasticizer was 10:1:3:1:4, and the mass ratio of graphene to silver nanoparticles in the graphene / silver nanoparticle composite was 86:18.

[0066] 3. Composite molding of wear-resistant fabric tape

[0067] 3.1. Base Fabric Pretreatment

[0068] The cotton / polyester blended fabric is treated with a 10% sodium hydroxide solution at 50°C for 20 minutes, washed with water until neutral, and then dried for later use.

[0069] 3.2. Coating Composite Process

[0070] A base fabric is coated with an ethylene-vinyl acetate copolymer core-shell emulsion (60 μm thick), laminated with an aramid nonwoven fabric, and then rolled together using a pressure roller (0.3 MPa) and dried at 80°C for 5 min. A multifunctional finishing agent is then coated onto the surface of the composite fabric (aramid nonwoven fabric side), and the two fabrics are pressed together using a micro-embossing roller.

[0071] 3.3. Post-processing

[0072] The finished product is placed in an environment of 25℃ and 60% relative humidity for 48 hours, then cut into 25mm wide rolls to obtain abrasion-resistant fabric tape. Figure 2 As shown.

[0073] Example 3

[0074] A method for preparing abrasion-resistant fabric tape includes the following steps:

[0075] 1. Preparation of ethylene-vinyl acetate copolymer core-shell emulsion

[0076] 1.1. Core-layer polymerization

[0077] Deionized water was added to the reactor, and the stirring speed was set to 300 r / min. Nitrogen gas was purged three times to remove air, and vinyl acetate (VAc) monomer was added. The temperature was raised to 50°C, and ethylene was introduced until the pressure inside the reactor reached 1.5 MPa. Ammonium persulfate (40% of the total amount) was added as the initiator, with a mass ratio of ethylene to vinyl acetate of 2:1. The reaction was maintained at 60°C and 2.0 MPa for 2 hours to form a high-ethylene content core layer.

[0078] 1.2. Shell polymerization

[0079] The remaining ammonium persulfate initiator (60% of the total amount) was dissolved in deionized water. A mixture of butyl acrylate, diacetone acrylamide, and vinyl acetate monomers was added dropwise to the reactor over 2 hours using a constant-pressure dropping funnel. During the addition, the temperature was gradually increased to 80°C, and ethylene was continuously introduced to maintain a pressure of 3.0 MPa. The mass ratio of vinyl acetate, butyl acrylate, diacetone acrylamide, and ethylene was 65:5:1:28. Dodecyl mercaptan, a chain transfer agent, was added simultaneously. After the addition was complete, the reaction was maintained at this temperature for 2 hours, then cooled to below 40°C, and the pressure was reduced before discharging to obtain an emulsion. Adipate dihydrazide was dissolved in deionized water to form an aqueous solution of adipate dihydrazide. The mass ratio of diacetone acrylamide to adipate dihydrazide was 1:1. The aqueous solution of adipate dihydrazide was slowly added dropwise to the emulsion at 75°C and 300 rpm with stirring. The mixture was filtered to obtain an ethylene-vinyl acetate copolymer core-shell emulsion with a solid content of 47%. A schematic diagram of the crosslinking reaction between diacetone acrylamide and adipate dihydrazide is shown below. Figure 3 As shown.

[0080] The total amount of ammonium persulfate is 0.8% of the total monomer mass, and the amount of dodecyl mercaptan is 0.5% of the total monomer mass.

[0081] 2. Compound formulation of multifunctional finishing agents

[0082] 2.1. Surface modification of nano-alumina

[0083] Nano-alumina (50 nm particle size) was placed in a plasma treatment instrument (300 W power, argon atmosphere) and treated for 5 min. An ethanol-water solution (ethanol to water volume ratio 1:1) was added, and the mixture was ultrasonically dispersed for 30 min. Then, silane coupling agent KH550 was added, and the mixture was stirred at 60 °C for 2 h. Polyethylene glycol (PEG-400) was added, and the pH was adjusted to 7.5. The reaction was continued for 2 h. After centrifugation and drying, the modified nano-alumina was obtained for later use. The mass ratio of nano-alumina, silane coupling agent KH550, polyethylene glycol, and ethanol-water solution was 10:1:2:90.

[0084] 2.2. Preparation of graphene / silver nanoparticle composites

[0085] Graphene oxide was dispersed in deionized water and sonicated for 1 hour. Silver nitrate solution (0.1 mol / L) was then added, followed by dropwise addition of 0.1 mol / L sodium borohydride solution until the solution turned grayish-black. The reaction was carried out at 60°C for 2 hours. After centrifugation and washing, a graphene / silver nanoparticle composite was obtained. The mass ratio of graphene oxide, silver nitrate, and sodium borohydride was 86:29:1.

[0086] 2.3. Blending of Composite Systems

[0087] Modified nano-alumina, graphene / silver nanoparticle composite, nano-zinc oxide (30 nm), and nano-silica (20 nm) were pre-dispersed in deionized water and ultrasonically dispersed for 20 min. Then, a polyester plasticizer was added, and the mixture was stirred at high speed (1500 r / min) for 30 min to obtain a multifunctional finishing agent with a solid content of 40%. The mass ratio of the modified nano-alumina, graphene / silver nanoparticle composite, nano-zinc oxide, nano-silica, and polyester plasticizer was 15:2:3:1:5, and the mass ratio of graphene to silver nanoparticles in the graphene / silver nanoparticle composite was 86:19.

[0088] 3. Composite molding of wear-resistant fabric tape

[0089] 3.1. Base Fabric Pretreatment

[0090] The cotton / polyester blended fabric is treated with 10% sodium hydroxide solution at 60℃ for 30 minutes, washed with water until neutral, and dried for later use.

[0091] 3.2. Coating Composite Process

[0092] A base fabric is coated with an ethylene-vinyl acetate copolymer core-shell emulsion (70 μm thickness), laminated with an aramid nonwoven fabric, and then rolled together using a pressure roller (0.5 MPa pressure) and dried at 90°C for 6 min. A multifunctional finishing agent is then coated onto the surface of the composite fabric (aramid nonwoven fabric side), and the two fabrics are pressed together using a micro-embossing roller.

[0093] 3.3. Post-processing

[0094] The finished product is placed in an environment of 25℃ and 60% relative humidity for 48 hours, and then cut into 25mm wide rolls to obtain a wear-resistant fabric tape.

[0095] Comparative Example 1

[0096] A method for preparing abrasion-resistant fabric tape includes the following steps:

[0097] 1. Preparation of ethylene-vinyl acetate emulsion

[0098] Deionized water was added to the reactor, the stirring speed was 300 r / min, nitrogen was purged three times, vinyl acetate was added, the temperature was raised to 60℃, ethylene was introduced to the reactor pressure to 2.0 MPa, ammonium persulfate initiator of 0.8% of total monomer mass was added, and the reaction was maintained at 60℃ and 2.0 MPa for 4 h. Then the temperature was lowered to below 40℃, the pressure was reduced and the material was discharged, and filtered to obtain an ethylene-vinyl acetate emulsion with a solid content of 45%, and the mass ratio of vinyl acetate to ethylene was 3:1.

[0099] 2. Formulation of finishing agents

[0100] Take nano-alumina (particle size 50nm), add it directly to deionized water, and ultrasonically disperse for 30min. Take nano-zinc oxide (30nm) and disperse it separately in deionized water. Mix the above nano-alumina, nano-zinc oxide, and nano-silica, add polyester plasticizer, and stir at high speed (1500r / min) for 30min to obtain a finishing agent with a solid content of 40% (the mass ratio of nano-alumina, nano-zinc oxide, nano-silica, and polyester plasticizer is 15:5:1:5).

[0101] 3. Composite molding of wear-resistant fabric tape

[0102] The cotton / polyester blended fabric is directly washed and dried. A base fabric is coated with a common ethylene-vinyl acetate emulsion (70 μm coating thickness), then laminated with an aramid nonwoven fabric. The lamination is performed using a roller press (0.5 MPa pressure) and dried at 90℃ for 6 minutes. A finishing agent is then applied to the surface of the composite fabric (coating amount 15-20 g / m²). 2 The product is pressed with a micro-embossing roller (pressure 0.3MPa), dried and cured at 120℃ for 10 minutes, and then slit. The finished product is placed in an environment of 25℃ and 60% relative humidity for 48 hours, and then slit into 25mm wide rolls to obtain a wear-resistant fabric tape.

[0103] Comparative Example 2

[0104] A method for preparing abrasion-resistant fabric tape includes the following steps:

[0105] 1. Preparation of vinyl acetate-acrylate copolymer emulsion

[0106] Deionized water was added to the reactor, the stirring speed was 300 r / min, nitrogen was purged three times, a mixture of vinyl acetate and butyl acrylate monomers (mass ratio 7:1) was added, the temperature was raised to 70℃, 0.8% of the total monomer mass of ammonium persulfate was added, the temperature was maintained at 70℃ for 3 h, the temperature was lowered to below 40℃ and the product was discharged, and filtered to obtain a vinyl acetate-acrylate copolymer emulsion with a solid content of 46%.

[0107] 2. Formulation of wear-resistant finishing agents

[0108] Light calcium carbonate (particle size 100nm) and nano silica (20nm) were pre-dispersed in deionized water and sonicated for 20 min. Dibutyl phthalate plasticizer was added and stirred at high speed (1500 r / min) for 30 min to obtain a wear-resistant finishing agent with a solid content of 40% (the mass ratio of light calcium carbonate, nano silica and dibutyl phthalate was 15:4:5).

[0109] 3. Composite molding of wear-resistant fabric tape

[0110] The cotton / polyester blended fabric was treated in a 50℃ sodium carbonate solution (5% by mass) for 20 min, washed with water until neutral, and dried to obtain the base fabric. The base fabric was coated with a vinyl acetate-acrylate copolymer emulsion (70 μm coating thickness), laminated with a polyester nonwoven fabric, and then rolled using a pressure roller (0.5 MPa pressure) and dried at 80℃ for 8 min. An abrasion-resistant finishing agent was then coated onto the surface of the composite fabric (coating amount 15-20 g / m²). 2 The product is then pressed with a flat roller (pressure 0.3MPa), dried and cured at 110℃ for 12 minutes, and then slit. The finished product is placed in an environment of 25℃ and 60% relative humidity for 48 hours, and then slit into 25mm wide rolls to obtain a wear-resistant fabric tape.

[0111] The tensile strength test involved cutting each abrasion-resistant fabric tape into 25mm wide and 150mm long samples, using a tensile testing machine with a clamping distance of 100mm and a tensile speed of 300mm / min, and recording the maximum force value at which the sample broke. The unwinding force test involved fixing the tape roll on the testing machine and unwinding it at a uniform speed of 30m / min, recording the average force value during the unwinding process, in N. The 180° self-backing peel test involved attaching the adhesive side of the tape sample (25mm wide, 200mm long) to its own backing material, pressing it three times with a 2kg standard roller at a speed of 300mm / min, and then placing it in an environment of 25℃ and 60% humidity for 24 hours. Finally, a 180° peel was performed using a tensile testing machine at a speed of 300mm / min, and the average force value during the peeling process was recorded. The number of uses was determined by fixing the tape sample on a turntable, using a CS-10 grinding wheel with a load of 500g, and rubbing the tape surface at a speed of 60 r / min. The total number of rubs was recorded until the substrate was exposed or the surface coating was damaged. Three samples were tested in each group, and the average value was taken. The overall score for roughness similarity was 3-4 points, with three people giving 4 points, three people giving 3 points, and one person giving 2 points. The overall score for softness similarity was 3-4 points, with three people giving 4 points, and four people giving 3 points.

[0112] Table 1. Test results of abrasion-resistant fabric tape prepared in the examples and comparative examples.

[0113] Fracture strength (N) Unwinding force (N) 180° self-back peel (N) Number of times used feel Example 1 80.47 4.76 3.21 ＞10 soft Example 2 79.86 4.65 3.27 ＞10 soft Example 3 78.22 3.45 2.78 ＞10 soft Comparative Example 1 46.64 2.5 2.24 ＞10 There is a sense of friction Comparative Example 2 41.36 2.24 2.18 ＞10 There is a sense of friction.

[0114] As shown in Table 1, Examples 1 to 3 used ethylene-vinyl acetate copolymer (EVA) core-shell emulsions. The core layer was a high-ethylene content phase (ethylene to vinyl acetate mass ratio 1:1~2:1). The ethylene segments had high crystallinity and flexibility, providing basic strength and tear resistance for the coating. The shell layer introduced butyl acrylate (a flexible monomer), diacetone acrylamide, and adipate dihydrazide. Butyl acrylate improved the flexibility of the emulsion film formation, avoiding brittleness. The ketone group of diacetone acrylamide and the hydrazide group of adipate dihydrazide underwent a crosslinking reaction, significantly improving the cohesiveness of the coating. The EVA emulsion in Comparative Example 1 lacked a core-shell structure, had poor molecular chain uniformity, and lacked a crosslinking system, resulting in weak cohesiveness. The vinyl acetate-acrylate copolymer emulsion in Comparative Example 2 did not contain ethylene (lacking highly crystalline segments) and lacked a crosslinking design, resulting in insufficient mechanical strength. In the ethylene-vinyl acetate copolymer core-shell emulsions of Examples 1 to 3, the butyl acrylate in the shell layer imparts moderate viscosity to the adhesive layer, while the crosslinking system of diacetone acrylamide and adipate dihydrazide prevents excessive viscosity. Simultaneously, the crystallinity of the ethylene segments provides cohesive support, balancing viscosity and cohesive force to ensure stable peel strength. The ethylene-vinyl acetate emulsion of Comparative Example 1 lacks butyl acrylate for viscosity adjustment and is not crosslinked, resulting in low viscosity. The vinyl acetate-acrylate copolymer emulsion of Comparative Example 2 lacks ethylene segments, resulting in insufficient cohesive force and an imbalance in viscosity control, leading to low peel strength. In the multifunctional finishing agents of Examples 1 to 3, nano-alumina was modified with plasma, silane coupling agent KH550, and PEG-400: plasma treatment increased the surface activity of the nanoparticles, silane coupling agent KH550 improved its compatibility with silicone rubber and polyester plasticizer, and PEG-400 further reduced the surface friction coefficient; the layered structure of the graphene-silver nanoparticle composite can fill the coating gaps, making the surface smoother. Both work together to reduce frictional resistance during unwinding and improve the stability of the unwinding force. In Comparative Example 1, the unmodified nano-alumina easily agglomerates to form rough protrusions, resulting in low and unstable unwinding force; Comparative Example 2 used light calcium carbonate, resulting in a rough surface and poor unwinding performance. In the ethylene-vinyl acetate copolymer core-shell emulsions of Examples 1 to 3, the flexibility of the ethylene segments synergistically with the flexibility of butyl acrylate, making the coating itself soft; the polyester plasticizer has good compatibility with the system, further improving flexibility. The modified nano-alumina was uniformly dispersed without agglomerates or protrusions, and PEG-400 reduced the surface friction coefficient, avoiding a rough feel. In Comparative Example 1, the nano-alumina agglomerated to form hard particles, resulting in a rough feel; Comparative Example 2 used dibutyl phthalate, and the light calcium carbonate had large particle size and poor dispersion, resulting in a rough surface and a deteriorated feel.

[0115] The above results demonstrate and describe the basic principles and main features of this application, as well as its advantages.

[0116] Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the equivalents of the appended claims.

Claims

1. A method for preparing abrasion-resistant fabric tape, characterized in that, Includes the following steps: Ethylene and vinyl acetate undergo core-shell polymerization under the action of an initiator; ethylene, butyl acrylate, diacetone acrylamide, and vinyl acetate undergo shell-shell polymerization under the action of an initiator, and a chain transfer agent and adipate dihydrazide are added to obtain an ethylene-vinyl acetate copolymer core-shell emulsion. Modified nano-alumina was obtained by modifying nano-alumina in an ethanol aqueous solution with silane coupling agent and polyethylene glycol. The modified nano-alumina was then formulated with graphene / silver nanoparticle composite, nano-zinc oxide, nano-silica, and polyester plasticizer to obtain a multifunctional finishing agent. After pretreatment of cotton / polyester blended fabric, an ethylene-vinyl acetate copolymer core-shell emulsion is coated, laminated with aramid nonwoven fabric, dried by roller pressing, coated with a multifunctional finishing agent and micro-embossed, and then post-treated to obtain a wear-resistant fabric tape.

2. The method for preparing abrasion-resistant fabric tape according to claim 1, characterized in that, In the core-layer polymerization reaction, the reaction temperature of ethylene and vinyl acetate is 50-60℃, the reaction time is 1-2h, and the mass ratio of ethylene to vinyl acetate is (1-2):

1.

3. The method for preparing abrasion-resistant fabric tape according to claim 1, characterized in that, The shell polymerization reaction is carried out at 70-80℃ and 2.5-3.0MPa, with the mass ratio of vinyl acetate, butyl acrylate, diacetone acrylamide and ethylene being (40-65):(2-5):1:(12-28).

4. The method for preparing abrasion-resistant fabric tape according to claim 1, characterized in that, The initiator is ammonium persulfate, and the amount of ammonium persulfate is 0.5-0.8% of the total monomer mass; the chain transfer agent is dodecyl mercaptan, and the amount of dodecyl mercaptan is 0.1%-0.5% of the total monomer mass; the mass ratio of diacetone acrylamide to adipate dihydrazide is 1:(0.8-1).

5. The method for preparing abrasion-resistant fabric tape according to claim 1, characterized in that, The mass ratio of the nano-alumina, silane coupling agent, polyethylene glycol, and ethanol aqueous solution is 10:1:2:90, wherein the volume ratio of ethanol to water in the ethanol aqueous solution is 1:

1.

6. The method for preparing abrasion-resistant fabric tape according to claim 1, characterized in that, The mass ratio of the modified nano-alumina, graphene and / or silver nanoparticle composite, nano-zinc oxide, nano-silica, and polyester plasticizer is (10-15):(1-2):3:1:(4-5).

7. The method for preparing abrasion-resistant fabric tape according to claim 1, characterized in that, The graphene / silver nanoparticle composite was prepared as follows: graphene oxide was dispersed in deionized water, ultrasonically treated for 0.5-1 h, and then 0.1 mol / L silver nitrate solution was added. 0.1 mol / L sodium borohydride solution was added dropwise until the solution turned grayish-black. The reaction was carried out at 50-60℃ for 1-2 h. After centrifugation and washing, the graphene / silver nanoparticle composite was obtained. The mass ratio of graphene oxide, silver nitrate and sodium borohydride was 86:29:

1.

8. The method for preparing abrasion-resistant fabric tape according to claim 1, characterized in that, The pretreatment of the cotton / polyester blended fabric includes: the cotton / polyester blended fabric is treated with sodium hydroxide solution, then washed and dried, wherein the mass fraction of the sodium hydroxide solution is 10%.

9. The method for preparing abrasion-resistant fabric tape according to claim 1, characterized in that, The coating thickness of the ethylene-vinyl acetate copolymer core-shell emulsion is 60-70 μm, and the pressure of the roller composite is 0.3-0.5 MPa.

10. The method for preparing abrasion-resistant fabric tape according to claim 1, characterized in that, The drying temperature is 80-90℃ and the time is 5-6 minutes.

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