High-layering-resistance grinding non-woven fabric

Abstract

The invention relates to the technical field of grinding tool manufacturing, and discloses a high-layering-resistance grinding non-woven fabric which is prepared from pre-reaction ATBN modified phenolic resin, brown fused alumina grinding materials, alcoholysis-resistant titanate coupling agents, hydrophobic fumed silica, polyvinyl butyral and mixed solvents. Wherein the resin is of an interpenetrating network structure formed by pre-reaction grafting of amino-terminated liquid nitrile rubber and phenolic resin. The preparation method of the high-layering-resistance grinding non-woven fabric comprises the steps of PVB premixed liquid preparation, filler modification and dispersion, resin compounding, slurry blending, impregnation programmed heating curing and the like. By constructing a resin interpenetrating network structure and cooperating with interface synergistic modification, the fracture toughness of a binding agent layer and the holding force of the binding agent layer to the abrasive are improved, and the technical problems that a traditional phenolic aldehyde-based abrasive material is large in brittleness and prone to layering and sand falling are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of abrasive manufacturing technology, specifically to a high-resistance delamination abrasive nonwoven fabric. Background Technology

[0002] Abrasive nonwoven fabrics, due to their open-mesh structure and good flexibility, are widely used in the surface grinding and polishing of both metallic and non-metallic materials. In the composition of abrasive nonwoven fabrics, the binder plays a crucial role in bonding the fiber network and holding the abrasive particles. Currently, phenolic resin is widely used in industry as the main binder because it possesses excellent hardness and heat resistance after curing.

[0003] However, conventional phenolic resins, after curing, exhibit high crosslinking density, resulting in brittleness, high internal stress, and poor impact resistance. Under heavy loads or high-speed grinding conditions, this hard and brittle adhesive layer cannot effectively buffer and dissipate mechanical stress, easily leading to brittle fracture at the interface between the resin and the abrasive or fiber matrix. This interfacial failure directly manifests as microcracks in the grinding layer, subsequently causing premature abrasive shedding and material delamination, significantly shortening the service life of the grinding nonwoven fabric and affecting the quality of the processed surface. While existing physical blending toughening modification methods can reduce brittleness to some extent, they often face the problem of poor compatibility between the modifier and the resin matrix, making it difficult to effectively improve the impact fracture resistance while maintaining the resin's high heat resistance and high strength.

[0004] Therefore, this invention proposes a high-resistance delamination abrasion nonwoven fabric to overcome the shortcomings of the prior art. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a high-resistance delamination abrasive nonwoven fabric, which solves the problem that existing phenolic resin-based abrasive nonwoven fabrics, under heavy load and high-speed abrasive conditions, are prone to cracking of the adhesive layer, reduced holding force for abrasives, and delamination and shedding of abrasives, making it difficult to achieve both high strength and high toughness.

[0006] To address the above problems, the present invention provides the following technical solution: In a first aspect, the present invention provides a high-resistance delamination and abrasion-resistant nonwoven fabric, which adopts the following technical solution: A high-resistance delamination abrasive nonwoven fabric is made from the following raw materials in parts by weight: 100 parts by weight of pre-reacted ATBN-modified phenolic resin, wherein the pre-reacted ATBN-modified phenolic resin is an interpenetrating network structure formed by pre-reacting grafting of amino-terminated liquid butadiene-acrylonitrile rubber and phenolic resin, which is used to improve the holding force of the binder layer on the abrasive and the impact resistance of the abrasive nonwoven fabric; 200-300 parts by weight of brown corundum abrasive; 1.0-2.0 parts by weight of alcoholysis-resistant titanate coupling agent; 0.5-2.0 parts by weight of hydrophobic fumed silica; 2.0-5.0 parts by weight of polyvinyl butyral; and 15-30 parts by weight of mixed solvent, wherein the mixed solvent is a mixture of anhydrous ethanol and n-butanol.

[0007] By adopting the above technical solution, phenolic resin is pre-modified using amino-terminated liquid nitrile rubber, and with the synergistic effect of various additives, the overall performance of the abrasive nonwoven fabric is improved. The mechanism of action is as follows: Regarding the toughening and reinforcing mechanism of pre-reactive ATBN-modified phenolic resin: In traditional physical blending modification, the rubber phase and resin phase have poor compatibility and are prone to macroscopic phase separation. This invention utilizes pre-reactive grafting technology. Before the addition of formaldehyde, the terminal amino groups in the terminal amino liquid nitrile rubber undergo nucleophilic substitution reactions with the ortho- or para-active hydrogens on the benzene ring of phenol, forming a graft copolymer precursor. Subsequently, formaldehyde is added for polycondensation, where formaldehyde molecules form methylene bridges connecting the modified phenol and the unmodified phenol. During curing, as the molecular weight increases, the flexible nitrile rubber segments and the rigid phenolic resin segments interpenetrate and entangle, forming a microscopic phase separation structure where the rubber phase is dispersed within the resin matrix. When the nonwoven fabric is subjected to impact loads during grinding, the dispersed rubber phase acts as stress concentration points, inducing crazes and absorbing impact energy. While maintaining the heat resistance and rigidity of the phenolic resin, this improves the fracture toughness of the adhesive layer and inhibits brittle cracking during grinding.

[0008] Regarding the mechanism of interfacial bonding and system stability: Polyvinyl butyral (PVB) molecules contain long branches and hydroxyl groups. These hydroxyl groups form hydrogen bonds with the hydroxyl groups in the phenolic resin, constructing a physical cross-linking network and enhancing the flexibility of the adhesive layer. One end of the alcoholysis-resistant titanate coupling agent chemically bonds to the polar groups on the surface of brown corundum abrasive, while the other end's long-chain organic groups entangle or cross-link with the organic resin, forming a chemical connection between the inorganic abrasive and the organic resin, enhancing the interfacial wettability of the resin to the abrasive. Hydrophobic fumed silica, utilizing its hydrophobic surface groups and high specific surface area, forms a thixotropic three-dimensional network structure in the dispersion system, preventing the sedimentation of high-density abrasives, ensuring uniform coating thickness, and acting as nano-reinforcing particles after curing to improve the wear resistance of the adhesive layer.

[0009] Preferably, the raw materials are in the following proportions by weight: 100 parts by weight of pre-reacted ATBN-modified phenolic resin; 250 parts by weight of brown corundum abrasive; 1.5 parts by weight of alcoholysis-resistant titanate coupling agent; 1.2 parts by weight of hydrophobic fumed silica; 3.5 parts by weight of polyvinyl butyral; and 22 parts by weight of mixed solvent. By adopting the above technical solution, this formulation optimizes the synergistic effect of each component, ensuring coating processability while improving the folding resistance and peel strength of the cured abrasive nonwoven fabric, thus balancing the rigidity and toughness of the material.

[0010] Preferably, the pre-reacted ATBN-modified phenolic resin is prepared from chemical raw materials comprising the following parts by weight: 100 parts by weight of phenol; 10.0-15.0 parts by weight of amino-terminated liquid nitrile rubber; 112-130 parts by weight of a 37wt% formaldehyde aqueous solution; and 1.5-2.0 parts by weight of barium hydroxide octahydrate. The pre-reaction temperature of the amino-terminated liquid nitrile rubber with phenol is 80-85°C, and the pre-reaction time is 40-60 min. By adopting the above technical solution, controlling the pre-reaction temperature and time of the amino-terminated liquid nitrile rubber with phenol is used to construct a stable interpenetrating network structure. Temperatures below 80°C or insufficient time result in low grafting rates and poor product compatibility; temperatures above 85°C or excessive time can easily lead to excessive viscosity or localized gelation of the reaction system. Process parameters within this range ensure that end-group grafting is achieved in the molten state of phenol, providing a uniform reaction precursor for the subsequent formaldehyde polycondensation reaction, and maintaining a high level of glass transition temperature and thermal decomposition temperature of the cured product.

[0011] Preferably, the alcoholysis-resistant titanate coupling agent is isopropyltris(dioctylpyrophosphate) titanate with a titanium content of 4.7wt%±0.2wt%. By adopting the above technical solution, this titanate coupling agent exhibits solvent resistance and hydrolysis resistance, maintains structural stability in alcohol solvent systems, ensures continuous modification of the abrasive surface during mixing and coating processes, and maintains the interfacial bonding strength between the resin and the abrasive.

[0012] Preferably, the specific surface area of ​​the hydrophobic fumed silica is 170±20 m². 2 / g, the surface of the hydrophobic fumed silica is chemically modified with dimethyldichlorosilane. By adopting the above technical solution, the dimethyldichlorosilane modification reduces the surface energy of silica, blocks the erosion of the adhesive layer by environmental moisture, and improves the water aging resistance of the abrasive nonwoven fabric; the particles in this specific surface area range are dispersed in the resin matrix, fill micro-defects, and improve the density of the adhesive layer.

[0013] Preferably, the mass ratio of anhydrous ethanol to n-butanol in the mixed solvent is 1:1; the alumina content of the brown fused alumina abrasive is greater than or equal to 95.0%, and the brown fused alumina abrasive is subjected to high-temperature calcination treatment at 1050℃. By adopting the above technical solution, the evaporation rate is adjusted by the compounding of ethanol and n-butanol, avoiding skinning or pinhole defects on the coating surface; the high-temperature calcination treatment removes organic impurities from the surface of the brown fused alumina and reduces microcracks, increases the surface roughness of the abrasive, and enhances the grafting efficiency and mechanical interlocking force of the coupling agent.

[0014] Secondly, the present invention provides a method for preparing a nonwoven fabric with high resistance to delamination and abrasion, using the following technical solution: A method for preparing a high-resistance delamination abrasion-resistant nonwoven fabric includes the following steps: S1. Preparation of premixed solution: Add the mixed solvent to the stirring tank, add polyvinyl butyral, heat to 40-50℃ and keep stirring until the polyvinyl butyral is completely dissolved to obtain a transparent adhesive solution. S2. Filler modification and dispersion: Add alcoholysis-resistant titanate coupling agent and hydrophobic fumed silica sequentially to the transparent adhesive obtained in step S1, and disperse at high speed to obtain a dispersion. S3. Resin compounding: While maintaining stirring, add pre-reacted ATBN-modified phenolic resin to the dispersion obtained in step S2, and stir to mix to obtain the composite material. S4. Coating solution preparation: Add brown corundum abrasive to the composite material obtained in step S3 in batches, and continue stirring to obtain the grinding coating slurry. S5. Impregnation and molding: The abrasive coating slurry is injected into the impregnation tank, and non-woven fabric is selected as the substrate for impregnation treatment. Then it is sent into the drying tunnel for programmed temperature rise and curing. After cooling and cutting, a high anti-delamination abrasive non-woven fabric is obtained.

[0015] By adopting the above technical solution, the preparation process uses stepwise mixing and in-situ modification to promote the microscopic dispersion and binding of each component.

[0016] In step S1, polyvinyl butyral is dissolved preferentially, and the warm solvent is used to promote the expansion of polymer chain segments to form a homogeneous matrix, providing a rheological basis for the suspension and dispersion of powder materials.

[0017] In step S2, the coupling agent and hydrophobic fumed silica are subjected to high-speed shear dispersion before the resin is added. The coupling agent is first activated and adsorbed on the silica surface, preventing the agglomeration of nanoparticles. The steric hindrance effect of the coupling agent is used to stabilize the dispersion system. The low viscosity environment before the addition of high-viscosity phenolic resin is conducive to shear force transmission and improves dispersion efficiency.

[0018] In step S3, a pre-reactive modified resin is introduced for physical mixing to avoid uncontrollable chemical competition reactions in the complex multi-component system and ensure the storage stability of the system.

[0019] In step S5, the programmed temperature rise curing allows the solvent to evaporate in a gradient, preventing coating pores; segmented curing (drying, curing, and post-treatment) ensures that the cross-linking reaction of the phenolic resin proceeds in an orderly manner, allowing the interpenetrating network structure to develop fully, eliminating curing internal stress, and giving the finished abrasive nonwoven fabric dimensional stability.

[0020] Preferably, in step S2, the high-speed dispersion rotation speed is 800–1200 r / min, and the dispersion time is 15–25 min. By employing the above technical solution, this shear strength and time are used to disperse secondary aggregates of inorganic particles. Too low a rotation speed results in insufficient shear force; too high a rotation speed or too long a time can easily lead to excessive solvent evaporation, system temperature rise, or mechanical degradation.

[0021] Preferably, in step S5, the programmed temperature curing includes a drying stage, a curing stage, and a post-treatment stage; the drying stage has a temperature of 85–95°C and a time of 30–40 min; the curing stage has a temperature of 105–115°C and a time of 2.0–2.5 h; and the post-treatment stage has a temperature of 120–130°C and a time of 1.0 h. By adopting the above technical solution, the drying stage is used to remove solvents and small molecule volatiles, allowing the adhesive layer to initially take shape; the curing stage promotes the condensation reaction of formaldehyde and phenol at their remaining active sites and the etherification reaction between hydroxymethyl groups, constructing the resin matrix network; the post-treatment stage promotes the reaction of residual free phenols and converts ether bonds into methylene bonds, improving crosslinking density and heat resistance.

[0022] Preferably, the nonwoven fabric is nylon 66 nonwoven fabric with a basis weight of 150 g / m². 2 In step S5, the amount of adhesive applied is controlled by a roller mill. By adopting the above technical solution, nylon 66 fiber exhibits wear resistance, heat resistance, and high compatibility with phenolic resin adhesives; 150g / m² 2 The gram weight provides suitable matrix strength and adhesive space, and when combined with the roller mill to control the amount of adhesive applied, it ensures uniform abrasive distribution and consistent belt thickness, providing stable grinding force.

[0023] This invention provides a nonwoven fabric with high resistance to delamination and abrasion. It has the following beneficial effects: 1. This invention employs a pre-reaction grafting technique between amino-terminated liquid nitrile rubber and phenolic resin to construct an interpenetrating network structure in the curing system. This structure utilizes the flexible segments of the rubber phase to disperse stress in a rigid resin matrix, solving the problems of high brittleness and poor impact resistance in traditional phenolic resin cured products. It improves the mechanical holding force of the binder layer on the abrasive and the overall fracture toughness of the grinding nonwoven fabric, making it less prone to brittle cracking under high-speed, heavy-load grinding conditions.

[0024] 2. This invention introduces a synergistic modification system of an alcoholysis-resistant titanate coupling agent and hydrophobic fumed silica. The coupling agent establishes chemical bonds at the interface between the inorganic abrasive and the organic resin, enhancing the interfacial adhesion strength; the hydrophobic fumed silica imparts thixotropy to the system to prevent the sedimentation of high-density brown corundum and blocks moisture erosion. Combined with the toughening effect of polyvinyl butyral, the two improve the peel strength and water aging resistance of the abrasive layer, effectively preventing delamination and sand shedding of the abrasive nonwoven fabric during use, primarily due to interfacial bonding failure.

[0025] 3. The preparation process of this invention adopts a strategy combining stepwise mixing and dispersion with programmed temperature curing. Stepwise mixing ensures uniform dispersion of micro and nano fillers in the resin matrix, avoiding agglomeration; programmed temperature curing enables stable evaporation of the solvent gradient and orderly progress of the resin crosslinking reaction, reducing the volume shrinkage rate and internal stress during the curing process, and endowing the resulting abrasive nonwoven fabric with excellent dimensional stability and surface smoothness. Attached Figure Description

[0026] Figure 1 This is a schematic diagram comparing the physicochemical properties of the resin of the present invention; Figure 2 This is a schematic diagram illustrating the interfacial bonding strength and fatigue resistance of the present invention; Figure 3 This is a schematic diagram illustrating the environmental stability retention rate of the present invention. Figure 4 This is a schematic diagram of the grinding efficiency versus time curve of the present invention. Detailed Implementation

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] The main raw materials and reagents used in the following examples and comparative examples have the following sources and specifications. Reagents not specifically mentioned are all commercially available analytical grade or higher grade products.

[0029] Amino-terminated liquid nitrile butadiene rubber (ATBN): Amino-terminated butadiene-acrylonitrile copolymer, with an acrylonitrile content of 180±5 g / kg, an amine equivalent (AEW) of 900±50 g / mol, and a Brookfield viscosity (27℃) of 200±50 Pa·s.

[0030] Polyvinyl butyral (PVB): Low viscosity type, acetal degree 76wt%±2wt%, weight average molecular weight (Mw) is 15000 to 25000 g / mol, and the viscosity of 10wt% ethanol solution (20℃) is 20 to 60 mPa·s.

[0031] Alcohololysis-resistant titanate coupling agent: Isopropyl tris(dioctylpyrophosphoryloxy) titanate, CAS No.: 65345-34-8, titanium content 4.7wt%±0.2wt%, acid value (mgKOH / g) is 180±20.

[0032] Hydrophobic fumed silica: Surface chemically modified with dimethyldichlorosilane (DDS), with a specific surface area (BET) of 170±20 m². 2 / g, carbon content 1.0wt%±0.2wt%.

[0033] Pre-reacted ATBN modified phenolic resin: prepared in-house; preparation method detailed in the preparation example below.

[0034] Brown fused alumina abrasive: α-Al2O3 content ≥95.0%, calcined at 1050℃, particle size P100.

[0035] Other common chemical reagents include: phenol, formaldehyde aqueous solution (37wt%), barium hydroxide octahydrate, 2,4,6-tris(dimethylaminomethyl)phenol (DMP-30), γ-aminopropyltriethoxysilane (KH-550), anhydrous ethanol, n-butanol, etc., all of which are commercially available general chemicals.

[0036] Preparation Example 1: This preparation example provides a pre-reacted ATBN-modified phenolic resin A with high rigidity, comprising the following steps: Add 100 parts by weight of phenol and 1.5 parts by weight of barium hydroxide octahydrate to a four-necked reaction flask equipped with an electric stirrer, a reflux condenser and a thermometer. Heat the mixture to 50°C to completely melt the phenol and stir until homogeneous. Subsequently, 10.0 parts by weight of amino-terminated liquid nitrile butadiene rubber (ATBN) was slowly added to the reaction flask, and the temperature was raised to 80°C and kept constant for 60 minutes to allow the ATBN to pre-react with phenol. The temperature was then lowered to 60°C, and 130 parts by weight of formaldehyde aqueous solution (concentration 37wt%) was slowly added dropwise to the reaction flask over 45 minutes, with the material temperature controlled not to exceed 75°C during the addition. After the addition was completed, the temperature was slowly raised to 85°C and refluxed for 100 minutes until a sample was taken and the resin showed obvious turbidity in water. A vacuum device was then connected, and dehydration was carried out under reduced pressure at a vacuum of -0.08 MPa and a temperature of 80°C until the volatile content of the resin was below 8%. Finally, anhydrous ethanol was added to adjust the solid content to 70%±2%, and the mixture was cooled to below 40°C before being discharged to obtain pre-reactive modified resin A.

[0037] Preparation Example 2: This preparation example provides a pre-reacted ATBN-modified phenolic resin B with a balance of toughness and strength, comprising the following steps: Add 100 parts by weight of phenol and 1.8 parts by weight of barium hydroxide octahydrate to a four-necked reaction flask equipped with an electric stirrer, a reflux condenser and a thermometer, heat to 52°C to completely melt the phenol and stir evenly. Subsequently, 12.5 parts by weight of amino-terminated liquid nitrile butadiene rubber (ATBN) was slowly added to the reaction flask, and the temperature was raised to 82°C and kept constant for 50 minutes to allow the ATBN to pre-react with phenol. The temperature was then lowered to 60°C, and 121 parts by weight of formaldehyde aqueous solution (concentration 37wt%) was slowly added dropwise to the reaction flask over 50 minutes, with the material temperature controlled not to exceed 75°C during the addition. After the addition was completed, the temperature was slowly raised to 88°C and refluxed for 110 minutes until a sample was taken and the resin showed obvious turbidity in water. A vacuum device was then connected, and dehydration was carried out under reduced pressure at a vacuum of -0.085 MPa and a temperature of 82°C until the volatile content of the resin was below 8%. Finally, anhydrous ethanol was added to adjust the solid content to 70%±2%, and the mixture was cooled to below 40°C before being discharged to obtain pre-reactive modified resin B.

[0038] Preparation Example 3: This preparation example provides a high-toughness pre-reacted ATBN-modified phenolic resin C, comprising the following steps: Add 100 parts by weight of phenol and 2.0 parts by weight of barium hydroxide octahydrate to a four-necked reaction flask equipped with an electric stirrer, a reflux condenser and a thermometer, heat to 55°C to completely melt the phenol and stir evenly. Subsequently, 15.0 parts by weight of amino-terminated liquid nitrile butadiene rubber (ATBN) was slowly added to the reaction flask, and the temperature was raised to 85°C and kept constant for 40 minutes to allow the ATBN to pre-react with phenol. The temperature was then lowered to 60°C, and 112 parts by weight of formaldehyde aqueous solution (concentration 37wt%) was slowly added dropwise to the reaction flask over 60 minutes, with the material temperature controlled not to exceed 75°C during the addition. After the addition was completed, the temperature was slowly raised to 90°C and refluxed for 120 minutes until a sample was taken and the resin showed obvious turbidity in water. A vacuum device was then connected, and dehydration was carried out under reduced pressure at a vacuum of -0.09 MPa and a temperature of 85°C until the volatile content of the resin was below 8%. Finally, anhydrous ethanol was added to adjust the solid content to 70%±2%, and the mixture was cooled to below 40°C before being discharged to obtain pre-reactive modified resin C.

[0039] Example 1: This example provides a high-resistance delamination abrasion-resistant nonwoven fabric, using the resin system of Preparation Example 1. The preparation process includes the following steps: (1) Preparation of premixed solution: Add 15 parts by weight of mixed solvent (anhydrous ethanol and n-butanol in a mass ratio of 1:1) to a stirring tank, turn on the stirring (300 r / min), add 2.0 parts by weight of polyvinyl butyral (PVB), heat to 40°C and stir for 30 minutes until PVB is completely dissolved to form a transparent liquid. (2) Filler modification and dispersion: Add 1.0 parts by weight of alcoholysis-resistant titanate coupling agent and 0.5 parts by weight of hydrophobic fumed silica to the adhesive solution in step (1), increase the stirring speed to 800 r / min, and disperse at high speed for 15 minutes to activate and uniformly disperse the additives. (3) Resin compounding: While keeping the stirring state, add 100 parts by weight of the pre-reaction modified resin A prepared in Preparation Example 1 above, adjust the speed to 400 r / min, and stir for 20 minutes to make the components evenly mixed. (4) Coating liquid preparation: Add 200 parts by weight of brown corundum abrasive (P100) in batches and stir for 30 minutes after the addition is complete to obtain a uniform grinding coating slurry. (5) Impregnation and molding: The above-mentioned grinding and coating slurry is injected into the impregnation tank, and the unit weight is 150g / m³. 2 Nylon 66 nonwoven fabric is used as the base material for impregnation treatment. The amount of adhesive is controlled by a roller mill. Then it is sent into the drying tunnel for programmed temperature curing (drying at 85℃ for 40 minutes, curing at 105℃ for 2 hours, and post-treatment at 120℃ for 1 hour). After cooling and cutting, nonwoven fiber abrasive nonwoven fabric is obtained.

[0040] Example 2: This example provides a high-resistance delamination abrasion-resistant nonwoven fabric, using the resin system of Preparation Example 2. The preparation process includes the following steps: (1) Preparation of premixed solution: Add 22 parts by weight of mixed solvent (anhydrous ethanol and n-butanol in a mass ratio of 1:1) to a stirring tank, turn on the stirring (350 r / min), add 3.5 parts by weight of polyvinyl butyral (PVB), heat to 45°C and stir for 40 minutes until PVB is completely dissolved to form a transparent liquid. (2) Filler modification and dispersion: 1.5 parts by weight of alcoholysis-resistant titanate coupling agent and 1.2 parts by weight of hydrophobic fumed silica were added to the adhesive solution in step (1) in sequence. The stirring speed was increased to 1000 r / min and high-speed dispersion was carried out for 20 minutes. The coupling agent was coated on the surface of the filler by shear force. (3) Resin compounding: While keeping the stirring state, add 100 parts by weight of the pre-reactive modified resin B prepared in Preparation Example 2 above, adjust the speed to 500 r / min, and stir for 30 minutes to make the components evenly mixed. (4) Coating liquid preparation: Add 250 parts by weight of brown corundum abrasive (P100) in batches and stir for 40 minutes after the addition is complete to obtain a uniform grinding coating slurry. (5) Impregnation and molding: The above-mentioned grinding and coating slurry is injected into the impregnation tank, and the unit weight is 150g / m³. 2 Nylon 66 nonwoven fabric is used as the base material for impregnation treatment. The amount of adhesive is controlled by a roller mill. Then it is sent into the drying tunnel for programmed temperature curing (drying at 90℃ for 30 minutes, curing at 110℃ for 2 hours, and post-treatment at 125℃ for 1 hour). After cooling and cutting, nonwoven fiber abrasive nonwoven fabric is obtained.

[0041] Example 3: This example provides a high-resistance delamination abrasion-resistant nonwoven fabric, using the resin system of Example 3. The preparation process includes the following steps: (1) Preparation of premixed solution: Add 30 parts by weight of mixed solvent (anhydrous ethanol and n-butanol in a mass ratio of 1:1) to a stirring tank, turn on the stirring (400 r / min), add 5.0 parts by weight of polyvinyl butyral (PVB), heat to 50°C and stir for 50 minutes to ensure that the high content of PVB is completely dissolved without clumping; (2) Filler modification and dispersion: Add 2.0 parts by weight of alcoholysis-resistant titanate coupling agent and 2.0 parts by weight of hydrophobic fumed silica to the adhesive solution in step (1), increase the stirring speed to 1200 r / min, and disperse at high speed for 25 minutes to ensure that the thixotropic agent is fully dispersed to form a stable network structure. (3) Resin composite: While keeping the stirring state, add 100 parts by weight of the pre-reactive modified resin C prepared in Preparation Example 3 above, adjust the speed to 600 r / min, and stir for 40 minutes to fully homogenize the system; (4) Coating liquid preparation: Add 300 parts by weight of brown corundum abrasive (P100) in batches and stir for 50 minutes after the addition is completed to obtain a uniform grinding coating slurry. (5) Impregnation and molding: The above-mentioned grinding and coating slurry is injected into the impregnation tank, and the unit weight is 150g / m³. 2 Nylon 66 nonwoven fabric is used as the base material for impregnation treatment. The amount of adhesive is controlled by a roller mill. Then it is sent into the drying tunnel for programmed temperature curing (drying at 95℃ for 30 minutes, curing at 115℃ for 2.5 hours, and post-treatment at 130℃ for 1 hour). After cooling and cutting, nonwoven fiber abrasive nonwoven fabric is obtained.

[0042] Comparative Example 1: Compared to Example 2, the difference lies in that the modified resin used did not undergo a pre-reaction step with phenol and ATBN during preparation. Specifically, during resin preparation, phenol, ATBN, formaldehyde, and catalyst were added to the reactor all at once, and the temperature was directly raised to 80°C for reflux reaction. The remaining raw material ratios and subsequent dehydration and solid content adjustment steps were exactly the same as in Example 2. The subsequent coating and curing process for preparing the milled nonwoven fabric was the same as in Example 2.

[0043] Comparative Example 2: Compared with Example 2, the difference is that: in the raw materials for the synthesis of the pre-reaction modified resin B, an equal mass of carboxylated butadiene-acrylonitrile latex was used to replace the amino-terminated liquid butadiene-acrylonitrile rubber (ATBN), and the rest of the preparation process was the same as in Example 2; the subsequent process for preparing the milled nonwoven fabric was the same as in Example 2.

[0044] Comparative Example 3: Compared with Example 2, the difference is that the resin used in step (3) is replaced with commercially available unmodified thermosetting phenolic resin, and in order to balance the solid content and rubber content, 12.5 parts by weight of liquid nitrile rubber (ATBN) is used as a physical toughening agent. It is not pre-reacted with phenol and is directly added to the mixing tank for physical blending. The remaining steps are the same as in Example 2.

[0045] Comparative Example 4: Compared with Example 2, the difference is that in the preparation of the premixed solution in step (1), polyvinyl butyral (PVB) was not added, but an equal amount of mixed solvent was used instead. The remaining steps are the same as in Example 2.

[0046] Comparative Example 5: Compared with Example 2, the difference is that the alcoholysis-resistant titanate coupling agent used in step (2) is replaced with an equal mass of silane coupling agent KH-560, and the remaining steps are the same as in Example 2.

[0047] Test Example 1: Analysis of the basic physicochemical and thermal properties of pre-reactive modified resins Experimental Objective: This test case aims to verify the differences in chemical reaction degree, crosslinking network structure and thermal stability between the amino-terminated liquid nitrile butadiene rubber (ATBN) pre-reaction modified resins (A, B, C) synthesized in Examples 1-3 and the resins prepared without the pre-reaction process (Comparative Example 1) and ordinary commercially available thermosetting phenolic resins (Comparative Example 3).

[0048] The experimental steps are as follows: The free phenol content was determined according to GB / T-30773-2014 standard. 1 g (accurate to 0.0001 g) of the test sample was weighed and dissolved in anhydrous ethanol. A potassium bromate-potassium bromide solution and hydrochloric acid solution were added to initiate the bromination reaction. After standing in the dark, potassium iodide solution was added, and the solution was titrated with sodium thiosulfate standard titrant. The mass fraction of free phenol was calculated.

[0049] Non-volatile matter (solid content) was determined according to GB / T-14074-2006 standard. 1.5g of sample was weighed and placed in an aluminum foil dish, heated at 135℃ in a forced-air drying oven for 60 minutes, then removed and cooled to room temperature in a desiccator before weighing. The percentage of residue by mass was calculated.

[0050] The glass transition temperature was analyzed using differential scanning calorimetry (DSC). 5-10 mg of cured resin powder was placed in an aluminum crucible, and under nitrogen flow protection at a rate of 50 mL / min, the temperature was increased from 30 °C to 250 °C at a rate of 10 °C / min. The heat flow curve was recorded, and the midpoint inflection point temperature was taken as the Tg value.

[0051] Thermal decomposition properties were tested using a thermogravimetric analyzer (TGA). 5-10 mg of cured resin sample was taken and heated from 30 °C to 800 °C at a rate of 20 °C / min under a nitrogen atmosphere. The temperature (Td5) at which the sample mass loss reached 5% was measured.

[0052] The experimental data are summarized in Table 1.

[0053] Table 1: Summary of test data on the physicochemical and thermal properties of different resin systems

[0054] Conclusion: Analysis of Appendix Figure 1 According to the data in Table 1, the free phenol content of the resins obtained in Preparation Examples 1 to 3 was all below 3.0%, while that in Comparative Example 1 was 5.82%. Comparative Example 1 did not employ a pre-reaction process between phenol and ATBN, and the active amino groups of the ATBN molecular chain did not preferentially undergo nucleophilic substitution with phenol, resulting in the presence of unconverted phenol monomers and ungrafted ATBN chains in the reaction system. A pre-reaction process helps improve the reaction conversion rate and reduce small molecule residues.

[0055] Glass transition temperature (Tg) data showed that the Tg of ordinary phenolic resin (Comparative Example 3) was 165.8℃, indicating relatively high rigidity. In Preparation Examples 1 to 3, the Tg decreased from 148.5℃ to 136.7℃ with increasing ATBN content. This change indicates that the long-chain flexible nitrile butadiene segments are embedded in the rigid phenolic network, increasing the mobility of molecular chains. The Tg of Comparative Example 1 decreased to 129.4℃. Analysis of its high free phenol content suggests that this was not due to the formation of a toughening network, but rather to incomplete reaction leading to low crosslinking density and the formation of a large amount of low molecular weight oligomers. Low crosslinking density causes the resin to soften during grinding and heating, affecting holding power.

[0056] Regarding the thermal decomposition temperature (Td5), the decomposition temperatures of Preparation Examples 1 to 3 were between 412℃ and 423℃, higher than that of Comparative Example 1 (384℃) and superior to ordinary phenolic resin. The CN chemical bonds formed between the terminal amino groups and the phenolic backbone have high bond energies, and the interpenetrating network structure hinders the dissociation of molecular chains during thermal decomposition. Comparative Example 1, due to the lack of effective chemical bonding, has weak interfacial bonding between the two phases, making it prone to thermal degradation at the interface upon heating, thus reducing its heat resistance. The pre-reaction grafting process introduced flexible segment modification while maintaining the thermal stability of the resin system.

[0057] Test Example 2: Mechanical Properties and Delamination Resistance Test of Abrasive Nonwoven Fabrics Experimental Objective: This test case mainly focuses on characterizing the mechanical properties of the nonwoven fiber abrasive nonwoven fabrics prepared in Examples 1-3 and Comparative Examples 1-5. The tensile load, flexibility, and bonding strength between the coating and the matrix (anti-delamination performance) of the abrasive nonwoven fabrics are investigated to verify the impact of the resin modification process and auxiliary agent system on the service life of the final product.

[0058] The experimental steps are as follows: (1) The test was conducted in accordance with JB / T-7424-2007 "Coated Abrasives - Method for Determination of Tensile Strength and Elongation". The nonwoven fabric to be tested was cut into rectangular specimens of 250mm×50mm along the longitudinal direction. The initial distance between the upper and lower clamps of the electronic universal testing machine was set to 100mm, and the tensile speed was set to 100mm / min. The tensile program was started until the specimen completely broke, and the maximum load (N / 50mm) and elongation at break were recorded. Five samples were tested in parallel for each group, and the arithmetic mean was taken.

[0059] (2) The T-stripping method was used to evaluate the bonding strength between the abrasive layer / bonding layer and the nonwoven fabric matrix. The abrasive nonwoven fabric was cut into 25mm wide samples. The nonwoven fabric and adhesive layer at one end of the sample were pre-peeled by 30mm. The two separated ends were clamped in the upper and lower clamps of the tensile testing machine. The tensile speed was set to 100mm / min for continuous peeling. The average load (N / 25mm) during the peeling process was recorded. This value is the interlayer peel strength.

[0060] (3) Cut a strip of sample with a length of 20 mm × 100 mm and fix it on the folding endurance tester for fatigue resistance testing. Set the radius of the arc axis R = 2.0 mm and the folding frequency to 60 times / minute, and perform 180° reciprocating folds. Continuously observe the sample surface and record the cumulative number of folds until the coating surface shows the first visible crack or peeling occurs.

[0061] The experimental data are summarized in Table 2.

[0062] Table 2: Summary of Mechanical Properties and Delamination Test Data of Finished Abrasive Nonwoven Fabrics

[0063] Conclusion: According to the appendix Figure 2 And the data analysis in Table 2: The interlayer peel strength of Example 2 was 68.7 N / 25 mm, which is higher than that of Comparative Example 3 (physical blend) at 45.8 N / 25 mm. In the physical blend system, microscopic phase separation occurred between the rubber phase and the phenolic resin during curing, resulting in insufficient interfacial bonding. Example 2 established an interpenetrating network structure through chemical pre-reaction, which enhanced the resin cohesion, and the modified resin had better wettability on the nonwoven fabric substrate, thus improving the overall interfacial bonding strength.

[0064] Comparative Example 1 exhibited the lowest interlaminar peel strength (34.2 N / 25 mm) among all groups. This group lacked pre-reaction of phenol and ATBN during preparation, resulting in ineffective grafting structure formation during resin synthesis. The cured product exhibited uneven cross-linking density and defects, making it prone to internal delamination under stress. This demonstrates the necessity of a pre-reaction process for ensuring resin structural uniformity and product anti-delamination performance.

[0065] The alcoholysis-resistant titanate coupling agent used in Example 2 exhibits a higher peel strength than the 52.9 N / 25 mm achieved in Comparative Example 5 using the general-purpose silane coupling agent KH-560. In systems containing alcohol solvents and with high filler content, this titanate coupling agent demonstrates stronger modification effects on inorganic fillers and nylon fiber surfaces, contributing to the formation of stable chemical bonds at the organic-inorganic interface.

[0066] Regarding toughness indicators, Example 3 exhibited an elongation at break of 11.2% and a folding resistance of 1140 cycles, indicating that the introduced flexible segments hindered crack propagation with increasing ATBN content. Comparative Example 2, which used an equal amount of carboxyl-based nitrile butadiene latex instead of ATBN, showed lower peel strength (51.5 N / 25 mm) and folding resistance compared to Example 2. This is attributed to the higher reactivity of the terminal amino groups in the phenolic system compared to the carboxyl groups, resulting in a higher degree of chemical bonding.

[0067] Comparative Example 4, without the addition of polyvinyl butyral (PVB), showed a decrease in folding resistance to 180 cycles and a reduction in tensile strength. This indicates that PVB not only regulates rheology in the system but also participates in coating film formation, providing a flexible skeleton. Relying solely on the resin itself for toughening is insufficient to meet the demands of high-frequency dynamic bending; the composite system of PVB and modified resin exhibits a synergistic effect in maintaining the overall mechanical properties of the abrasive nonwoven fabric.

[0068] Test Example 3: Performance Stability Test under High Temperature and Humidity Environments Experimental objective: To verify the retention rate of mechanical properties of the prepared abrasive nonwoven fabric under humid and hot conditions (boiling in water) and high-temperature aging, and to evaluate the influence of resin modification process and auxiliary agent system on the stability of organic-inorganic interface bonding.

[0069] The experimental steps are as follows: (1) Cut the prepared abrasive nonwoven fabrics into rectangular samples of 250mm × 50mm along the longitudinal direction, and prepare 5 parallel samples for each group. Immerse the samples completely in a constant temperature water bath containing boiling distilled water (100℃) and keep them boiling for 2 hours. After treatment, remove the samples, use filter paper to absorb the surface moisture, and let them stand for 1 hour in a standard laboratory environment (23±2℃, humidity 50±5%). Test the tensile load at break of the treated samples according to the JB / T-7424-2007 standard, and calculate the tensile strength retention rate after boiling (tensile strength after boiling / initial tensile strength × 100%).

[0070] (2) Take another set of abrasive nonwoven fabrics and cut them into strips 25 mm wide, 5 in each set. Hang the samples vertically in an electric heating drying oven, set the temperature to 180°C, and perform hot air aging treatment for 4 hours. After the treatment, take out the samples and let them cool naturally at room temperature for 2 hours to eliminate thermal stress. Use the T-type peel method (same as the steps in Test Example 2) to test the interlayer peel strength after aging, and calculate the peel strength retention rate after high temperature aging (peel strength after aging / initial peel strength × 100%).

[0071] The experimental data are summarized in Table 3.

[0072] Table 3: Performance retention data of abrasive nonwoven fabrics under humid and high temperature conditions

[0073] Conclusion: According to the appendix Figure 3 And the data analysis in Table 3: In Example 2, after boiling in water at 100°C for 2 hours, the tensile strength retention rate was 92.3%, which was superior to the 83.2% of Comparative Example 5 (silane coupling agent group). This difference indicates that the alcoholysis-resistant titanate coupling agent selected in this scheme established a more efficient interfacial protection in the solvent-based system. The titanate chemically chelates with the hydroxyl groups on the inorganic filler and fiber surface through solvation, forming a hydrophobic monolayer that blocks moisture penetration to the interface. In contrast, the silane coupling agent KH-560 carries the risk of hydrolysis in high-temperature and high-humidity environments, leading to the loss of some interfacial adhesion during the boiling process.

[0074] In a high-temperature aging test at 180℃ for 4 hours, Example 2 exhibited a peel strength retention rate of 89.4%, demonstrating excellent heat aging resistance. Comparative Example 1 (without pre-reaction) showed a retention rate of only 57.9%, and Comparative Example 3 (physical blend) showed 65.7%. In Comparative Examples 1 and 3, the ATBN component did not form sufficient chemical bonds with the phenolic resin backbone, making it prone to thermal migration or accelerated thermal oxidative degradation at high temperatures, leading to damage to the interfacial bonding layer. Example 2 utilized a pre-reaction process to anchor ATBN segments covalently within a three-dimensional cross-linked network, restricting the microscopic movement and thermal decomposition of the rubber phase and maintaining the structural integrity of the modified resin under high-temperature conditions.

[0075] Comparing the heat resistance of different toughening agents, Comparative Example 2 (carboxylated nitrile rubber latex) exhibited a peel retention rate of 63.3% during aging, lower than Example 2. Carboxylated latex contains numerous unsaturated double bonds, mostly dispersed in the matrix as physical fillers, resulting in weak resistance to heat and oxygen aging, and the adhesive layer easily becomes brittle after high-temperature treatment. Example 2 utilizes an amino-terminated liquid nitrile rubber reacting with phenolic resin, generating CN bonds with higher bond energies, which improves initial strength while ensuring performance stability under harsh thermal environments.

[0076] Test Example 4: Evaluation of Actual Grinding Efficiency and Durability Experimental objective: To evaluate the grinding cutting force, wear resistance and surface quality of abrasive nonwoven fabrics prepared by different resin modification processes under actual working conditions, and to verify the abrasive holding ability and impact resistance of the modified resin system.

[0077] The experimental steps are as follows: (1) A contact wheel belt grinding tester was used for testing. The nonwoven fabrics prepared in the examples and comparative examples were processed into a 2000mm×50mm ring belt and installed on the tester. A serrated rubber wheel with a hardness of 70HA was selected as the contact wheel, and the running linear speed of the grinding belt was set to 25m / s. A 10mm thick 304 stainless steel plate was selected as the standard test workpiece. Before the test, the workpiece was cleaned and accurately weighed (accurate to 0.01g).

[0078] (2) Set the grinding pressure to 30N and adopt constant pressure feed grinding mode. Start the equipment for continuous grinding operation, set the single grinding cycle to 10 minutes, and perform 6 cycles in total, with a total grinding time of 60 minutes. After each cycle, stop the equipment and weigh the residual weight of the stainless steel workpiece and the residual weight of the grinding belt. Record the cumulative material removal of the workpiece and the cumulative wear of the grinding belt.

[0079] (3) Calculate the grinding ratio (G value) based on the test data. The calculation formula is: G = workpiece removal amount / grinding belt wear amount. This value is used to comprehensively evaluate the cutting efficiency and service life of grinding nonwoven fabric.

[0080] (4) After the grinding test, use a surface roughness meter to select 5 different positions on the grinding surface of the workpiece to measure the roughness (Ra), and take the arithmetic mean to evaluate the uniformity of the grinding surface.

[0081] The experimental data are summarized in Table 4.

[0082] Table 4: Test data on constant pressure grinding performance and workpiece surface quality of grinding nonwoven fabric

[0083] Conclusion: According to the appendix Figure 4 And the data analysis in Table 4: The grinding ratio (G-value) of Example 2 was 82.26, and the wear of the abrasive nonwoven fabric was 1.15g, all of which were superior to other groups. Under constant pressure grinding conditions of 30N, the resin binder withstood continuous shear stress and impact load. The interpenetrating network structure formed by the pre-reaction of the amino-terminated nitrile rubber and phenolic resin in Example 2 endowed the binder with high toughness and strength, effectively absorbing grinding impact energy, and providing a stable holding effect on the abrasive, preventing abnormal shedding of abrasive grains before reaching the wear life, thus achieving the best balance between material removal and the wear of the abrasive itself.

[0084] In Comparative Example 1, the grinding ratio was 15.71, and the wear of the nonwoven fabric was as high as 4.67 g. The interfacial bonding between the non-chemically bonded ATBN and phenolic resin was weak, resulting in a brittle resin layer after curing. Under continuous impact, microcracks formed and propagated within the resin binder, causing the resin layer to peel off in sheets carrying the abrasive particles. This not only reduced cutting efficiency but also created irregular scratches on the workpiece surface from the detached abrasive grains, leading to an increase in the surface roughness Ra value to 0.68 μm.

[0085] The surface roughness of Example 3 was 0.32 μm, the lowest among all groups. The higher ATBN content endowed the resin layer with better flexibility, resulting in better conformability of the abrasive nonwoven fabric under the action of the contact wheel and more uniform abrasive penetration depth. Comparative Example 4, without PVB, had the highest abrasion loss (5.21 g) and the lowest G-value. Lacking the synergistic toughening effect of PVB, the phenolic resin exhibited typical brittleness after curing, unable to adapt to dynamic bending during high-speed operation, leading to brittle fracture of the resin layer and a significant decrease in grinding performance.

[0086] The G-value of Example 2 (titanium ester coupling agent) is higher than that of Comparative Example 5 (silane coupling agent, G-value 45.30). The grinding process generates a large amount of heat. The alcoholysis-resistant titanate coupling agent maintains the chemical stability of the interface between the inorganic filler and the resin matrix under high-temperature conditions, inhibiting interfacial aging failure caused by heat accumulation and ensuring the performance consistency of the abrasive nonwoven fabric during long-term grinding.

[0087] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-resistance delamination abrasion-resistant nonwoven fabric, characterized in that, Made from the following ingredients in parts by weight: 100 parts by weight of pre-reacted ATBN modified phenolic resin, wherein the pre-reacted ATBN modified phenolic resin is an interpenetrating network structure formed by pre-reacting grafting of amino-terminated liquid nitrile rubber and phenolic resin, which is used to improve the binding force of the binder layer on the abrasive and the impact resistance of the abrasive nonwoven fabric. Brown fused alumina abrasive: 200-300 parts by weight; 1.0 to 2.0 parts by weight of alcoholysis-resistant titanate coupling agent; 0.5–2.0 parts by weight of hydrophobic fumed silica; Polyvinyl butyral 2.0 to 5.0 parts by weight; The mixed solvent is 15-30 parts by weight, wherein the mixed solvent is a mixture of anhydrous ethanol and n-butanol.

2. The high-resistance delamination abrasion-resistant nonwoven fabric according to claim 1, characterized in that, The weight parts of the raw materials are: 100 parts by weight of pre-reacted ATBN-modified phenolic resin; 250 parts by weight of brown fused alumina abrasive; 1.5 parts by weight of alcoholysis-resistant titanate coupling agent; 1.2 parts by weight of hydrophobic fumed silica; 3.5 parts by weight of polyvinyl butyral; 22 parts by weight of mixed solvent.

3. The high-resistance delamination abrasion-resistant nonwoven fabric according to claim 1, characterized in that, The pre-reacted ATBN-modified phenolic resin is prepared from chemical raw materials comprising the following parts by weight: 100 parts by weight of phenol; 10.0 to 15.0 parts by weight of amino-terminated liquid nitrile rubber; 112-130 parts by weight of a 37 wt% formaldehyde aqueous solution; 1.5–2.0 parts by weight of barium hydroxide octahydrate; The pre-reaction temperature of the terminal amino liquid nitrile rubber and phenol is 80-85℃, and the pre-reaction time is 40-60 min.

4. The high-resistance delamination abrasion-resistant nonwoven fabric according to claim 1, characterized in that, The alcoholysis-resistant titanate coupling agent is isopropyltris(dioctylpyrophosphate) titanate with a titanium content of 4.7wt%±0.2wt%.

5. The high-resistance delamination abrasion-resistant nonwoven fabric according to claim 1, characterized in that, The specific surface area of ​​the hydrophobic fumed silica is 170±20 m². 2 / g, the surface of the hydrophobic fumed silica is chemically modified with dimethyldichlorosilane.

6. The high-resistance delamination abrasion-resistant nonwoven fabric according to claim 1, characterized in that, The mass ratio of anhydrous ethanol to n-butanol in the mixed solvent is 1:1; the alumina content of the brown fused alumina abrasive is greater than or equal to 95.0%, and the brown fused alumina abrasive is subjected to high-temperature calcination treatment at 1050℃.

7. A method for preparing a high-resistance delamination abrasion-resistant nonwoven fabric according to any one of claims 1-6, characterized in that, Includes the following steps: S1. Add the mixed solvent to the mixing tank, add polyvinyl butyral, heat to 40-50°C and keep stirring until the polyvinyl butyral is completely dissolved to obtain a transparent adhesive solution. S2. Add an alcoholysis-resistant titanate coupling agent and hydrophobic fumed silica sequentially to the transparent adhesive solution and disperse at high speed to obtain a dispersion. S3. While maintaining stirring, add pre-reacted ATBN modified phenolic resin to the dispersion and stir to mix to obtain the composite material; S4. Add brown fused alumina abrasive to the composite material in batches, continue stirring, and obtain a grinding and coating slurry. S5. The abrasive coating slurry is injected into the impregnation tank, and a non-woven fabric is selected as the substrate for impregnation treatment. Then it is sent into the drying tunnel for programmed temperature rise and curing. After cooling and cutting, the high anti-delamination abrasive non-woven fabric is obtained.

8. The method for preparing a high-resistance delamination abrasion-resistant nonwoven fabric according to claim 7, characterized in that, In step S2, the high-speed dispersion rotation speed is 800-1200 r / min, and the dispersion time is 15-25 min.

9. The method for preparing a high-resistance delamination abrasion-resistant nonwoven fabric according to claim 7, characterized in that, In step S5, the programmed temperature curing includes a drying stage, a curing stage, and a post-treatment stage; the temperature of the drying stage is 85-95℃, and the time is 30-40 min; the temperature of the curing stage is 105-115℃, and the time is 2.0-2.5 h; the temperature of the post-treatment stage is 120-130℃, and the time is 1.0 h.

10. The method for preparing a high-resistance delamination abrasion-resistant nonwoven fabric according to claim 7, characterized in that, The nonwoven fabric is nylon 66 nonwoven fabric with a basis weight of 150 g / m². 2 In step S5, the amount of adhesive applied is controlled by a roller mill.

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