A high-toughness, durable polyvinyl chloride tape and method of making the same

Abstract

This invention relates to the field of polymer materials technology, specifically to a high-toughness and durable polyvinyl chloride (PVC) tape and its preparation method, comprising a PVC vinyl material and a pressure-sensitive adhesive layer. The PVC vinyl material comprises the following raw materials in parts by weight: 100 parts PVC resin, 25-35 parts octyl epoxide fatty acid, 8-15 parts additive A, 3-7 parts additive B, 5-10 parts talc, and 0.5-1.5 parts stearic acid. In this invention, additive A uses carboxylated nitrile rubber as the elastomer matrix, combined with additives and naringenin-modified composite liquid, effectively absorbing and dispersing external impact, inhibiting crack propagation, and significantly improving the tape's toughness and tear resistance. Additive B uses chlorinated polyethylene as the matrix, combined with modified corn starch reactant and polyethylene wax. Modified starch strengthens the resin interface compatibility, and polyethylene wax improves processing dispersibility, synergistically enhancing the mechanical strength and durability of the substrate.

Description

Technical Field

[0001] This invention relates to the field of polymer materials technology, specifically to a high-toughness and durable polyvinyl chloride tape and its preparation method. Background Technology

[0002] Polyvinyl chloride (PVC) tape is made by coating a soft PVC film with pressure-sensitive adhesive. It has excellent electrical insulation, flame retardancy, weather resistance, acid and alkali resistance, and moisture resistance. It is flexible, has stable adhesion, and is easy to wrap and apply. It is suitable for insulation of wire and cable joints below 600V, wire harness bundling, line marking, and damage repair. It comes in a variety of colors to distinguish phase sequence and is widely used in electrical home decoration, industrial electrical, automotive wiring harnesses, equipment maintenance, and other scenarios. It is an economical and practical insulation and fixing wrapping material.

[0003] In existing technologies, traditional polyvinyl chloride (PVC) tapes still face significant technical bottlenecks in practical applications. Pure PVC resin itself is relatively hard and lacks toughness, making it prone to brittleness, especially at low temperatures, and exhibiting poor impact resistance. Therefore, this invention provides a high-toughness, durable PVC tape and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to provide a high-toughness and durable polyvinyl chloride tape and its preparation method. The polyvinyl chloride tape prepared by this invention not only has good toughness but also good durability, effectively improving the performance of polyvinyl chloride tape.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] In a first aspect, a high-toughness and durable polyvinyl chloride tape includes a polyvinyl chloride material and a pressure-sensitive adhesive layer, wherein the polyvinyl chloride material comprises the following raw materials in parts by weight: 100 parts polyvinyl chloride resin, 25-35 parts octyl epoxide fatty acid, 8-15 parts additive A, 3-7 parts additive B, 5-10 parts talc and 0.5-1.5 parts stearic acid;

[0007] The raw materials for additive A include carboxylated nitrile rubber, additives, and a compound liquid;

[0008] The raw materials for additive B include chlorinated polyethylene, reactants, and polyethylene wax.

[0009] Further, the additive A is prepared by the following method: carboxylated nitrile rubber and additives are added to a reaction vessel at a mass ratio of 1:(0.8-1.2), stirred at 300-400 rpm for 15-25 min to obtain a mixture, a composite liquid is added to the mixture, and the mixture is stirred at 800-1200 rpm for 1-2 h at 60-80℃, and then spray-dried to obtain additive A. The carboxylated nitrile rubber is selected as XNBR3304, and the amount of composite liquid added is 5-8% of the mass of the carboxylated nitrile rubber.

[0010] Further, the additive is prepared by the following method: Rosin pentaerythritol ester is added to a reaction vessel, and 1-ethyl-3-methylimidazol acetate is added at 120-130℃ under nitrogen protection. The mixture is stirred at 300-400 rpm for 30-60 min, then reacted at 140-150℃ for 3-5 h. After cooling to 80-90℃, an intermediate product is obtained. Ethyl acetate is added to the intermediate product, and the mixture is filtered to obtain a filtrate. The filtrate is distilled under reduced pressure at 50-60℃ for 0.5-1.5 h, and the remaining product after distillation is collected and dried at 60-70℃ for 12-24 h to obtain the additive. The mass of 1-ethyl-3-methylimidazol acetate is 15-25% of the mass of rosin pentaerythritol ester, and the mass of ethyl acetate is 1.5-2.33 times the mass of the intermediate product.

[0011] Further, the composite liquid is prepared by the following method: nano-titanium dioxide powder and anhydrous ethanol are mixed at a mass ratio of 1:(4-6), 0.5% sodium hexametaphosphate by mass of nano-titanium dioxide powder is added, and ultrasonic dispersion is carried out for 20-40 min to obtain nano-titanium dioxide dispersion, which is set aside for use. Naringenin and anhydrous ethanol are mixed at a mass ratio of 1:(6-9) to obtain naringenin ethanol solution. Naringenin ethanol solution is added to nano-titanium dioxide dispersion, and the mixture is reacted at 50-70℃ for 1-2 h. After centrifugation, precipitate is obtained. The precipitate is washed with anhydrous ethanol 2-3 times and dried to obtain modified nano-titanium dioxide powder. Modified nano-titanium dioxide powder and anhydrous ethanol are mixed at a mass ratio of 1:(3-5) to obtain composite liquid, wherein the mass of naringenin is 3-5% of the mass of nano-titanium dioxide powder.

[0012] Further, the additive B is prepared by the following method: chlorinated polyethylene and reactants are added to a reaction vessel at a mass ratio of 1:(0.3-0.6), heated to 100-120°C to melt, polyethylene wax is added, and the mixture is stirred and mixed for 30-50 minutes to obtain a molten mixture. The molten mixture is then transferred to a twin-screw extruder for extrusion and granulation to obtain additive B, wherein the mass of the polyethylene wax is 10-20% of the mass of the chlorinated polyethylene.

[0013] Further, the reaction mixture is prepared by the following method: corn starch and phosphate buffer are mixed at a mass ratio of (1-3):(9-17) to obtain a starch suspension. Pullulanase is added at 50-55℃ and the reaction is carried out for 2-4 hours. The precipitate is obtained by centrifugation. The precipitate is dried and pulverized through a 200-mesh sieve to obtain precipitate powder. The precipitate powder is mixed with pyridine solution at a mass ratio of 1:(3-4) to obtain a starch-pyridine suspension. Itaconic anhydride is added dropwise at 60℃ under nitrogen protection and the reaction is maintained at this temperature for 4-6 hours. After cooling, anhydrous ethanol is added, and the mixture is filtered. The filter residue is washed with anhydrous ethanol 3-5 times and dried to obtain the reaction mixture.

[0014] Further, the pressure-sensitive adhesive layer is prepared by the following method: natural rubber latex is added to a reaction vessel, carboxylated styrene-butadiene latex is added, and the reaction is carried out for 1-2 hours. After the reaction is completed, tackifying resin emulsion and antioxidant 1010 are added, and the mixture is stirred at a speed of 300-400 rpm for 15-25 minutes to obtain the pressure-sensitive adhesive layer. The mass of the carboxylated styrene-butadiene latex is 10-20% of the mass of the natural rubber latex, the mass of the tackifying resin emulsion is 30-50% of the mass of the natural rubber latex, and the mass of antioxidant 1010 is 0.5-1% of the mass of the natural rubber latex.

[0015] Furthermore, the pressure-sensitive adhesive layer is coated on both sides of the polyvinyl chloride material.

[0016] Further, the concentration of the phosphate buffer is 0.01-0.1 mol / L, the mass of pullulanase is 0.1-0.3% of the mass of corn starch, the mass concentration of the pyridine solution is 20-25%, and the mass of itaconic anhydride is 50-60% of the mass of the precipitate powder.

[0017] Secondly, the present invention provides a method for preparing high-toughness and durable polyvinyl chloride tape, comprising the following steps:

[0018] Step 1: Add polyvinyl chloride resin, octyl epoxide fatty acid, additive A, additive B, talc and stearic acid to a high-speed mixer and mix at 80-100℃ for 10-20 minutes to obtain a premix.

[0019] Step 2: Add the premixed material to a twin-screw extruder, melt and plasticize it at 150-180℃, extrude it into a film, and then calender, cool, draw, and wind the extruded film to obtain polyvinyl chloride material;

[0020] Step 3: Apply the pressure-sensitive adhesive layer to both sides of the polyvinyl chloride material, dry it at 80-120℃ for 2-5 minutes, roll it up, and cure the rolled tape at 40-60℃ for 24-48 hours to obtain a high-toughness and durable polyvinyl chloride tape.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In this invention, additive A uses carboxylated nitrile rubber as the elastomer matrix, combined with additives and naringenin-modified composite liquid. The additives are ionic liquid-modified pentaerythritol rosin, which introduces a rigid alicyclic structure and forms hydrogen bonds with the carboxylated nitrile rubber, constructing physical cross-linking points inside the elastomer. At the same time, the polar carboxyl groups in the elastomer molecular chain enhance the compatibility with polyvinyl chloride, forming a flexible continuous phase to absorb impact energy. The composite liquid uses naringenin to modify nano-titanium dioxide, achieving uniform dispersion of inorganic particles through the interaction between phenolic hydroxyl groups and rubber carboxyl groups, forming a hybrid interface between organic and inorganic materials, effectively absorbing and dispersing external force impacts, inhibiting crack propagation, and significantly improving the toughness and tear resistance of the tape.

[0023] 2. In this invention, additive B uses chlorinated polyethylene as the matrix, combined with modified corn starch reactant and polyethylene wax. The modified starch enhances the interfacial compatibility of the resin, and the polyethylene wax improves the processing dispersibility. The reactant obtains a microcrystalline structure by pullulanase hydrolysis of corn starch, and then introduces unsaturated double bonds and carboxyl active sites through itaconic anhydride esterification modification. During the melt blending process, it crosslinks with chlorinated polyethylene to form a rigid structure with chemical bonds. The flexible chlorinated polyethylene network absorbs impact energy, and the rigid starch micro-regions terminate crack propagation, synergistically improving the mechanical strength and durability of the substrate. This allows the tape to maintain flexibility while possessing excellent tensile strength and anti-aging properties, significantly extending its service life.

[0024] 3. In this invention, the pressure-sensitive adhesive layer adopts a compound system of natural rubber latex and carboxylated styrene-butadiene latex, combined with tackifying resin and antioxidant, to give the tape excellent initial tack, holding power and elastic recovery ability. The introduction of carboxylated styrene-butadiene latex enhances the cohesive strength and polar group density of the adhesive layer, and improves the adhesion to different material surfaces. The tackifying resin adjusts the viscoelasticity to ensure that the tape has good peel strength and anti-rebound performance after wrapping and bonding. At the same time, the design of double-sided coating of pressure-sensitive adhesive layer further expands the applicability of the tape in electrical insulation, wire harness bundling and other scenarios. It has excellent comprehensive performance and broad market prospects. Attached Figure Description

[0025] Figure 1 The present invention provides a flowchart of a high-toughness and durable polyvinyl chloride tape and its preparation method. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that the raw materials used in the following embodiments are all commercially available.

[0028] Example 1:

[0029] Preparation of the additive: Rosin pentaerythritol ester was added to a reaction vessel, and 1-ethyl-3-methylimidazol acetate was added at 120°C under nitrogen protection. The mixture was stirred at 300 rpm for 30 min, and then reacted at 140°C for 3 h. After cooling to 80°C, an intermediate product was obtained. Ethyl acetate was added to the intermediate product, and the mixture was filtered to obtain a filtrate. The filtrate was distilled under reduced pressure at 50°C for 0.5 h, and the remaining product after distillation was collected and dried at 60°C for 12 h to obtain the additive. The mass of 1-ethyl-3-methylimidazol acetate was 15% of the mass of rosin pentaerythritol ester, and the mass of ethyl acetate was 1.5 times the mass of the intermediate product.

[0030] Preparation of the composite solution: Nano-titanium dioxide powder and anhydrous ethanol were mixed at a mass ratio of 1:4. Sodium hexametaphosphate (0.5% by mass of nano-titanium dioxide powder) was added and ultrasonically dispersed for 20 min to obtain a nano-titanium dioxide dispersion. The dispersion was set aside. Naringenin and anhydrous ethanol were mixed at a mass ratio of 1:6 to obtain a naringenin ethanol solution. The naringenin ethanol solution was added to the nano-titanium dioxide dispersion and reacted at 50℃ for 1 h. The precipitate was obtained by centrifugation. The precipitate was washed twice with anhydrous ethanol and dried to obtain modified nano-titanium dioxide powder. The modified nano-titanium dioxide powder and anhydrous ethanol were mixed at a mass ratio of 1:3 to obtain the composite solution. The mass of naringenin was 3% of the mass of the nano-titanium dioxide powder.

[0031] Preparation of Additive A: Carboxylated acrylonitrile rubber and additives were added to a reaction vessel at a mass ratio of 1:0.8 and stirred at 300 rpm for 15 min to obtain a mixture. A composite liquid was added to the mixture and stirred at 800 rpm for 1 h at 60°C. The mixture was then spray-dried to obtain Additive A. The carboxylated acrylonitrile rubber was selected as XNBR3304, and the amount of composite liquid added was 5% of the mass of the carboxylated acrylonitrile rubber.

[0032] Preparation of the reaction mixture: Corn starch and phosphate buffer were mixed at a mass ratio of 1:9 to obtain a starch suspension. Pullulanase was added at 50°C and the reaction was carried out for 2 hours. The precipitate was obtained by centrifugation. The precipitate was dried and pulverized through a 200-mesh sieve to obtain precipitate powder. The precipitate powder was mixed with pyridine solution at a mass ratio of 1:3 to obtain a starch-pyridine suspension. Itaconic anhydride was added dropwise at 60°C under nitrogen protection and the reaction was maintained at this temperature for 4 hours. After cooling, anhydrous ethanol was added, and the mixture was filtered. The filter residue was washed three times with anhydrous ethanol and dried to obtain the reaction mixture.

[0033] The concentration of the phosphate buffer is 0.01 mol / L, the mass of pullulanase is 0.1% of the mass of corn starch, the mass concentration of the pyridine solution is 20%, and the mass of itaconic anhydride is 50% of the mass of the precipitate powder.

[0034] Preparation of Additive B: Chlorinated polyethylene and reactants are added to a reaction vessel at a mass ratio of 1:0.3, heated to 100°C to melt, polyethylene wax is added, and the mixture is stirred and mixed for 30 minutes to obtain a molten mixture. The molten mixture is then transferred to a twin-screw extruder for extrusion and granulation to obtain Additive B, wherein the mass of the polyethylene wax is 10% of the mass of the chlorinated polyethylene.

[0035] Preparation of pressure-sensitive adhesive layer: Natural rubber latex was added to a reaction vessel, followed by carboxylated styrene-butadiene latex. The reaction was carried out for 1 hour. After the reaction was completed, tackifying resin emulsion and antioxidant 1010 were added. The mixture was stirred at 300 rpm for 15 minutes to obtain the pressure-sensitive adhesive layer. The mass of the carboxylated styrene-butadiene latex was 10% of the mass of the natural rubber latex, the mass of the tackifying resin emulsion was 30% of the mass of the natural rubber latex, and the mass of antioxidant 1010 was 0.5% of the mass of the natural rubber latex.

[0036] The pressure-sensitive adhesive layer is coated on both sides of the polyvinyl chloride material.

[0037] Preparation of raw materials for polyvinyl chloride materials: 100 parts polyvinyl chloride resin, 25 parts octyl ester of epoxy fatty acids, 8 parts additive A, 3 parts additive B, 5 parts talc powder and 0.5 parts stearic acid.

[0038] Preparation of high-toughness and durable polyvinyl chloride tape:

[0039] Step 1: Add polyvinyl chloride resin, octyl epoxide fatty acid, additive A, additive B, talc and stearic acid to a high-speed mixer and mix at 80°C for 10 minutes to obtain a premix.

[0040] Step 2: Add the premixed material to a twin-screw extruder, melt and plasticize it at 150°C, extrude it into a film, and then calender, cool, draw, and wind up the extruded film to obtain polyvinyl chloride material;

[0041] Step 3: Apply the pressure-sensitive adhesive layer to both sides of the polyvinyl chloride material, dry it at 80°C for 2 minutes, roll it up, and cure the rolled tape at 40°C for 24 hours to obtain a high-toughness and durable polyvinyl chloride tape.

[0042] Example 2:

[0043] Preparation of the additive: Rosin pentaerythritol ester was added to a reaction vessel, and 1-ethyl-3-methylimidazol acetate was added at 125°C under nitrogen protection. The mixture was stirred at 400 rpm for 45 min, and then reacted at 145°C for 4 h. After cooling to 85°C, an intermediate product was obtained. Ethyl acetate was added to the intermediate product, and the mixture was filtered to obtain a filtrate. The filtrate was distilled under reduced pressure at 55°C for 1 h, and the remaining product after distillation was collected and dried at 65°C for 18 h to obtain the additive. The mass of 1-ethyl-3-methylimidazol acetate was 20% of the mass of rosin pentaerythritol ester, and the mass of ethyl acetate was twice the mass of the intermediate product.

[0044] Preparation of the composite solution: Nano-titanium dioxide powder and anhydrous ethanol were mixed at a mass ratio of 1:5. Sodium hexametaphosphate (0.5% by mass of nano-titanium dioxide powder) was added, and the mixture was ultrasonically dispersed for 30 min to obtain a nano-titanium dioxide dispersion. The dispersion was then set aside. Naringenin and anhydrous ethanol were mixed at a mass ratio of 1:8 to obtain a naringenin ethanol solution. The naringenin ethanol solution was added to the nano-titanium dioxide dispersion, and the mixture was reacted at 60℃ for 1.5 h. The precipitate was then obtained by centrifugation. The precipitate was washed three times with anhydrous ethanol and dried to obtain modified nano-titanium dioxide powder. The modified nano-titanium dioxide powder and anhydrous ethanol were mixed at a mass ratio of 1:4 to obtain the composite solution. The mass of naringenin was 4% of the mass of the nano-titanium dioxide powder.

[0045] Preparation of Additive A: Carboxylated acrylonitrile rubber and additives were added to a reaction vessel at a mass ratio of 1:1 and stirred at 400 rpm for 20 min to obtain a mixture. A composite liquid was added to the mixture, and the mixture was stirred at 1000 rpm for 1.5 h at 70 °C and then spray-dried to obtain additive A. The carboxylated acrylonitrile rubber was selected as XNBR3304, and the amount of composite liquid added was 7% of the mass of the carboxylated acrylonitrile rubber.

[0046] Preparation of the reaction mixture: Corn starch and phosphate buffer were mixed at a mass ratio of 2:13 to obtain a starch suspension. Pullulanase was added at 52℃ and the reaction was carried out for 3 hours. The precipitate was obtained by centrifugation. The precipitate was dried and pulverized through a 200-mesh sieve to obtain precipitate powder. The precipitate powder was mixed with pyridine solution at a mass ratio of 1:3.5 to obtain a starch-pyridine suspension. Itaconic anhydride was added dropwise at 60℃ under nitrogen protection and the reaction was maintained for 5 hours. After cooling, anhydrous ethanol was added, and the mixture was filtered. The filter residue was washed four times with anhydrous ethanol and dried to obtain the reaction mixture.

[0047] The concentration of the phosphate buffer is 0.05 mol / L, the mass of pullulanase is 0.2% of the mass of corn starch, the mass concentration of the pyridine solution is 22%, and the mass of itaconic anhydride is 55% of the mass of the precipitate powder.

[0048] Preparation of Additive B: Chlorinated polyethylene and reactants are added to a reaction vessel at a mass ratio of 1:0.5, heated to 110°C to melt, polyethylene wax is added, and the mixture is stirred and mixed for 40 minutes to obtain a molten mixture. The molten mixture is then transferred to a twin-screw extruder for extrusion granulation to obtain Additive B, wherein the mass of the polyethylene wax is 15% of the mass of chlorinated polyethylene.

[0049] Preparation of pressure-sensitive adhesive layer: Natural rubber latex was added to a reaction vessel, followed by carboxylated styrene-butadiene latex. The reaction was carried out for 1.5 hours. After the reaction was completed, tackifying resin emulsion and antioxidant 1010 were added. The mixture was stirred at 400 rpm for 20 minutes to obtain the pressure-sensitive adhesive layer. The mass of the carboxylated styrene-butadiene latex was 15% of the mass of the natural rubber latex, the mass of the tackifying resin emulsion was 40% of the mass of the natural rubber latex, and the mass of antioxidant 1010 was 0.8% of the mass of the natural rubber latex.

[0050] The pressure-sensitive adhesive layer is coated on both sides of the polyvinyl chloride material.

[0051] Preparation of raw materials for polyvinyl chloride materials: 100 parts polyvinyl chloride resin, 30 parts octyl epoxide fatty acid, 12 parts additive A, 5 parts additive B, 8 parts talc and 1 part stearic acid.

[0052] Preparation of high-toughness and durable polyvinyl chloride tape:

[0053] Step 1: Add polyvinyl chloride resin, octyl epoxide fatty acid, additive A, additive B, talc and stearic acid to a high-speed mixer and mix at 90°C for 15 minutes to obtain a premix.

[0054] Step 2: Add the premixed material to a twin-screw extruder, melt and plasticize it at 170°C, extrude it into a film, and then calender, cool, draw, and wind up the extruded film to obtain polyvinyl chloride material;

[0055] Step 3: Apply the pressure-sensitive adhesive layer to both sides of the polyvinyl chloride material, dry it at 100℃ for 3 minutes, roll it up, and cure the rolled tape at 50℃ for 36 hours to obtain a high-toughness and durable polyvinyl chloride tape.

[0056] Example 3:

[0057] Preparation of the additive: Rosin pentaerythritol ester was added to a reaction vessel, and 1-ethyl-3-methylimidazol acetate was added at 130°C under nitrogen protection. The mixture was stirred at 400 rpm for 60 min, and then reacted at 150°C for 5 h. After cooling to 90°C, an intermediate product was obtained. Ethyl acetate was added to the intermediate product, and the mixture was filtered to obtain a filtrate. The filtrate was distilled under reduced pressure at 60°C for 1.5 h, and the remaining product after distillation was collected and dried at 70°C for 24 h to obtain the additive. The mass of 1-ethyl-3-methylimidazol acetate was 25% of the mass of rosin pentaerythritol ester, and the mass of ethyl acetate was 2.33 times the mass of the intermediate product.

[0058] Preparation of the composite solution: Nano-titanium dioxide powder and anhydrous ethanol were mixed at a mass ratio of 1:6. Sodium hexametaphosphate (0.5% by mass of nano-titanium dioxide powder) was added and ultrasonically dispersed for 40 min to obtain a nano-titanium dioxide dispersion, which was then set aside. Naringenin and anhydrous ethanol were mixed at a mass ratio of 1:9 to obtain a naringenin ethanol solution. The naringenin ethanol solution was added to the nano-titanium dioxide dispersion and reacted at 70℃ for 2 h. After centrifugation, the precipitate was obtained. The precipitate was washed three times with anhydrous ethanol and dried to obtain modified nano-titanium dioxide powder. The modified nano-titanium dioxide powder and anhydrous ethanol were mixed at a mass ratio of 1:5 to obtain the composite solution, wherein the mass of naringenin was 5% of the mass of the nano-titanium dioxide powder.

[0059] Preparation of Additive A: Carboxylated acrylonitrile rubber and additives were added to a reaction vessel at a mass ratio of 1:1.2 and stirred at 400 rpm for 25 min to obtain a mixture. A composite liquid was added to the mixture, and the mixture was stirred at 1200 rpm for 2 h at 80 °C and then spray-dried to obtain additive A. The carboxylated acrylonitrile rubber was selected as XNBR3304, and the amount of composite liquid added was 8% of the mass of the carboxylated acrylonitrile rubber.

[0060] Preparation of the reaction mixture: Corn starch and phosphate buffer were mixed at a mass ratio of 3:17 to obtain a starch suspension. Pullulanase was added at 55°C and the reaction was carried out for 4 hours. The precipitate was obtained by centrifugation. The precipitate was dried and pulverized through a 200-mesh sieve to obtain precipitate powder. The precipitate powder was mixed with pyridine solution at a mass ratio of 1:4 to obtain a starch-pyridine suspension. Itaconic anhydride was added dropwise at 60°C under nitrogen protection and the reaction was maintained for 6 hours. After cooling, anhydrous ethanol was added, and the mixture was filtered. The filter residue was washed 5 times with anhydrous ethanol and dried to obtain the reaction mixture.

[0061] The concentration of the phosphate buffer is 0.1 mol / L, the mass of pullulanase is 0.3% of the mass of corn starch, the mass concentration of the pyridine solution is 25%, and the mass of itaconic anhydride is 60% of the mass of the precipitate powder.

[0062] Preparation of Additive B: Chlorinated polyethylene and reactants are added to a reaction vessel at a mass ratio of 1:0.6, heated to 120°C to melt, polyethylene wax is added, and the mixture is stirred and mixed for 50 minutes to obtain a molten mixture. The molten mixture is then transferred to a twin-screw extruder for extrusion and granulation to obtain Additive B, wherein the mass of the polyethylene wax is 20% of the mass of chlorinated polyethylene.

[0063] Preparation of pressure-sensitive adhesive layer: Natural rubber latex was added to a reaction vessel, followed by carboxylated styrene-butadiene latex. The reaction was carried out for 2 hours. After the reaction was completed, tackifying resin emulsion and antioxidant 1010 were added. The mixture was stirred at 400 rpm for 25 minutes to obtain the pressure-sensitive adhesive layer. The mass of the carboxylated styrene-butadiene latex was 20% of the mass of the natural rubber latex, the mass of the tackifying resin emulsion was 50% of the mass of the natural rubber latex, and the mass of antioxidant 1010 was 1% of the mass of the natural rubber latex.

[0064] The pressure-sensitive adhesive layer is coated on both sides of the polyvinyl chloride material.

[0065] Preparation of raw materials for polyvinyl chloride materials: 100 parts polyvinyl chloride resin, 35 parts octyl ester of epoxy fatty acids, 15 parts additive A, 7 parts additive B, 10 parts talc and 1.5 parts stearic acid.

[0066] Preparation of high-toughness and durable polyvinyl chloride tape:

[0067] Step 1: Add polyvinyl chloride resin, octyl epoxide fatty acid, additive A, additive B, talc and stearic acid to a high-speed mixer and mix at 100°C for 20 minutes to obtain a premix.

[0068] Step 2: Add the premixed material to a twin-screw extruder, melt and plasticize it at 180°C, extrude it into a film, and then calender, cool, draw, and wind up the extruded film to obtain polyvinyl chloride material;

[0069] Step 3: Apply the pressure-sensitive adhesive layer to both sides of the polyvinyl chloride material, dry it at 120℃ for 5 minutes, roll it up, and cure the rolled tape at 60℃ for 48 hours to obtain a high-toughness and durable polyvinyl chloride tape.

[0070] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain additive A.

[0071] Comparative Example 2 differs from Example 1 in that it does not contain additive B.

[0072] Comparative Example 3 differs from Example 1 in that it does not contain additives A and B, but uses an equal amount of commercially available conventional impact modifier, acrylate copolymer ACR-401.

[0073] Performance testing: The high-toughness and durable polyvinyl chloride tapes prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to performance tests, and the test data are recorded in the table below:

[0074] Table 1

[0075] Testing items Tensile strength (MPa) Elongation at break (%) 180° peel strength (N / cm) Example 1 22.6 328 3.6 Example 2 23.4 346 3.7 Example 3 24.1 352 3.8 Comparative Example 1 16.3 215 2.8 Comparative Example 2 17.9 238 3.1 Comparative Example 3 15.2 187 2.5

[0076] In the performance testing, the tensile strength is determined as follows: Referring to GB / T 30776-2014, the tape is cut into standard-sized specimens and placed on a universal testing machine for tensile testing. The maximum tensile force at break is recorded, and the tensile strength is calculated. The elongation at break is determined as follows: Referring to GB / T 30776-20-14, this is performed simultaneously with the tensile strength test. The gauge length elongation at break is recorded, and the elongation at break is calculated as a percentage (%). The 180° peel strength is determined as follows: Referring to GB / T 2792-2014, the tape is cut into standard-width specimens, attached to a stainless steel test plate, rolled three times with a pressure roller, and after being left to stand for a specified time under standard conditions, placed on a tensile testing machine at a speed of 300 mm / min for a 180° peel test. The peel force is recorded, and the peel strength is calculated. The unit is Newtons per centimeter (N / cm).

[0077] A comprehensive analysis of the performance test data in the table shows that the high-toughness and durable PVC tapes prepared in Examples 1-3 have significantly better tensile strength, elongation at break, and peel strength than Comparative Examples 1-3. This result indicates that the composite system of additive A and additive B designed in this invention has a synergistic reinforcing effect on PVC materials.

[0078] Additive A uses carboxylated nitrile rubber as the elastomer matrix. By introducing a rigid alicyclic structure through additives, and combining it with the organic-inorganic hybrid interface formed by naringenin-modified nano-titanium dioxide, a structure combining a flexible energy-dissipating network and rigid cross-linking points is constructed inside the substrate. This effectively absorbs and disperses external impacts, improving the toughness and tear resistance of the tape. Additive B uses chlorinated polyethylene as the flexible network matrix and combines itaconic anhydride esterified modified starch reactant to form rigid bio-based microregions, constructing a rigid-flexible interpenetrating network structure. Through the synergistic mechanism of flexible chain segments absorbing energy and rigid microregions terminating crack propagation, the tape is endowed with excellent tensile strength and long-term durability. The two additives design the structure of polyvinyl chloride materials at different scales, forming a multi-level reinforcement system from molecular chain segments to micro-phase regions to macroscopic properties. Its mechanism of action is similar to the rigid-flexible composite structure of collagen fibers and minerals in natural biomaterials. Through multi-scale interface synergy, the contradiction between insufficient toughness and poor durability of traditional polyvinyl chloride tapes is solved.

[0079] Comparative Example 1, lacking additive component A, failed to form an elastomer toughening network and an organic-inorganic hybrid interface structure within the polyvinyl chloride material. This resulted in insufficient energy dissipation under stress, making crack propagation easier. Consequently, its tensile strength and elongation at break were significantly lower than in Example 1. Comparative Example 2, lacking additive component B, lacked an interpenetrating reinforcement structure constructed from chemically cross-linked rigid microregions and a flexible network. This weakened the material's resistance to deformation and mechanical strength, and its performance indicators were also lower than those of the examples. Comparative Example 3 used a commercially available conventional impact modifier to replace the composite system of additives A and B. Since the conventional modifier relied solely on a single elastomer toughening mechanism, it could not achieve a synergistic improvement in rigidity and toughness, and lacked a multi-level interface reinforcement design. Therefore, its overall performance was the worst, with all test data at the lowest level. This fully demonstrates that the additives A and B designed in this invention are not simply physical blends, but rather achieve multiple synergistic effects of elastomer toughening, rigid particle reinforcement, interfacial chemical bonding, and interpenetrating network construction through structural design and functional division of labor.

[0080] By comparing and analyzing the relevant data in the table, it can be seen that the polyvinyl chloride tape prepared by this invention not only has good toughness but also outstanding durability. This indicates that the high-toughness and durable polyvinyl chloride tape provided by this invention has a broader market prospect and is more suitable for widespread application.

[0081] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high-toughness, durable polyvinyl chloride tape, characterized in that, It includes a polyvinyl chloride (PVC) material and a pressure-sensitive adhesive layer. The PVC material comprises the following raw materials in parts by weight: 100 parts polyvinyl chloride resin, 25-35 parts octyl epoxide fatty acid, 8-15 parts additive A, 3-7 parts additive B, 5-10 parts talc, and 0.5-1.5 parts stearic acid. The raw materials for additive A include carboxylated nitrile rubber, additives, and a compound liquid; The raw materials for additive B include chlorinated polyethylene, reactants, and polyethylene wax.

2. The high-toughness, long-wearing polyvinyl chloride tape of claim 1, wherein, Additive A is prepared by the following method: Carboxylated nitrile rubber and additives are added to a reaction vessel at a mass ratio of 1:(0.8-1.2), stirred at 300-400 rpm for 15-25 min to obtain a mixture, a composite liquid is added to the mixture, and stirred at 800-1200 rpm for 1-2 h at 60-80℃, followed by spray drying to obtain additive A. The carboxylated nitrile rubber is selected as XNBR3304, and the amount of composite liquid added is 5-8% of the mass of the carboxylated nitrile rubber.

3. The high-toughness, long-wearing polyvinyl chloride tape of claim 2, wherein, The additive is prepared by the following method: Rosin pentaerythritol ester is added to a reaction vessel, and 1-ethyl-3-methylimidazol acetate is added at 120-130℃ under nitrogen protection. The mixture is stirred at 300-400 rpm for 30-60 min, and then reacted at 140-150℃ for 3-5 h. After cooling to 80-90℃, an intermediate product is obtained. Ethyl acetate is added to the intermediate product, and the mixture is filtered to obtain a filtrate. The filtrate is distilled under reduced pressure at 50-60℃ for 0.5-1.5 h, and the remaining product after distillation is collected and dried at 60-70℃ for 12-24 h to obtain the additive. The mass of 1-ethyl-3-methylimidazol acetate is 15-25% of the mass of rosin pentaerythritol ester, and the mass of ethyl acetate is 1.5-2.33 times the mass of the intermediate product.

4. The high tenacity, durable, polyvinyl chloride tape of claim 2, wherein, The composite liquid is prepared by the following method: nano-titanium dioxide powder and anhydrous ethanol are mixed at a mass ratio of 1:(4-6), and 0.5% sodium hexametaphosphate by mass of nano-titanium dioxide powder is added. The mixture is ultrasonically dispersed for 20-40 min to obtain a nano-titanium dioxide dispersion, which is then set aside. Naringenin and anhydrous ethanol are mixed at a mass ratio of 1:(6-9) to obtain a naringenin ethanol solution. The naringenin ethanol solution is added to the nano-titanium dioxide dispersion, and the mixture is reacted at 50-70℃ for 1-2 h. The mixture is then centrifuged to obtain a precipitate. The precipitate is washed 2-3 times with anhydrous ethanol and dried to obtain modified nano-titanium dioxide powder. The modified nano-titanium dioxide powder is mixed with anhydrous ethanol at a mass ratio of 1:(3-5) to obtain the composite liquid, wherein the mass of naringenin is 3-5% of the mass of the nano-titanium dioxide powder.

5. The high tenacity, durable, polyvinyl chloride tape of claim 1, wherein, Additive B is prepared by the following method: chlorinated polyethylene and reactants are added to a reaction vessel at a mass ratio of 1:(0.3-0.6), heated to 100-120℃ to melt, polyethylene wax is added, and the mixture is stirred for 30-50 minutes to obtain a molten mixture. The molten mixture is then transferred to a twin-screw extruder for extrusion granulation to obtain additive B, wherein the mass of the polyethylene wax is 10-20% of the mass of the chlorinated polyethylene.

6. The high tenacity, durable, polyvinyl chloride tape of claim 5, wherein, The reaction mixture is prepared by the following method: corn starch and phosphate buffer are mixed at a mass ratio of (1-3):(9-17) to obtain a starch suspension. Pullulanase is added at 50-55℃ and the reaction is carried out for 2-4 hours. The precipitate is obtained by centrifugation. The precipitate is dried and pulverized through a 200-mesh sieve to obtain precipitate powder. The precipitate powder is mixed with pyridine solution at a mass ratio of 1:(3-4) to obtain a starch-pyridine suspension. Itaconic anhydride is added dropwise at 60℃ under nitrogen protection and the reaction is maintained at this temperature for 4-6 hours. After cooling, anhydrous ethanol is added, and the mixture is filtered. The filter residue is washed with anhydrous ethanol 3-5 times and dried to obtain the reaction mixture.

7. The high-toughness and durable polyvinyl chloride tape according to claim 1, characterized in that, The pressure-sensitive adhesive layer is prepared by the following method: natural rubber latex is added to a reaction vessel, carboxylated styrene-butadiene latex is added, and the reaction is carried out for 1-2 hours. After the reaction is completed, tackifying resin emulsion and antioxidant 1010 are added, and the mixture is stirred at 300-400 rpm for 15-25 minutes to obtain the pressure-sensitive adhesive layer. The mass of the carboxylated styrene-butadiene latex is 10-20% of the mass of the natural rubber latex, the mass of the tackifying resin emulsion is 30-50% of the mass of the natural rubber latex, and the mass of antioxidant 1010 is 0.5-1% of the mass of the natural rubber latex.

8. The high-toughness and durable polyvinyl chloride tape according to claim 1, characterized in that, The pressure-sensitive adhesive layer is coated on both sides of the polyvinyl chloride material.

9. The high-toughness and durable polyvinyl chloride tape according to claim 6, characterized in that, The concentration of the phosphate buffer is 0.01-0.1 mol / L, the mass of pullulanase is 0.1-0.3% of the mass of corn starch, the mass concentration of pyridine solution is 20-25%, and the mass of itaconic anhydride is 50-60% of the mass of the precipitate powder.

10. The method for preparing the high-toughness and durable polyvinyl chloride tape according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Add polyvinyl chloride resin, octyl epoxide fatty acid, additive A, additive B, talc and stearic acid to a high-speed mixer and mix at 80-100℃ for 10-20 minutes to obtain a premix. Step 2: Add the premixed material to a twin-screw extruder, melt and plasticize it at 150-180℃, extrude it into a film, and then calender, cool, draw, and wind the extruded film to obtain polyvinyl chloride material; Step 3: Apply the pressure-sensitive adhesive layer to both sides of the polyvinyl chloride material, dry it at 80-120℃ for 2-5 minutes, roll it up, and cure the rolled tape at 40-60℃ for 24-48 hours to obtain a high-toughness and durable polyvinyl chloride tape.

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