High-strength anti-aging EPE material and preparation method thereof

Abstract

The invention discloses a high-strength anti-aging EPE material and a preparation method thereof, and belongs to the technical field of foaming materials. The high-strength aging-resistant EPE material comprises the following components in parts by weight: 60-80 parts of low-density polyethylene, 30-40 parts of a polyolefin elastomer POE, 2-3 parts of a foaming agent, 3-5 parts of a composite aging-resistant material, 2-3 parts of a compatilizer, 1-3 parts of a lubricant, 1-3 parts of an antistatic agent and 3-5 parts of a nucleating agent. The low-density polyethylene is used as a base material, then the polyolefin elastomer POE is used as a reinforcing material, the flexibility and low-temperature impact resistance of the foaming material are improved, the material has good fracture resistance and deformation resistance under high strength, the composite anti-aging material is introduced, the weather resistance, ultraviolet resistance and oxidation resistance of the EPE material are remarkably improved, and the EPE material is suitable for large-scale production. And the service life of the material is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of foaming materials, and particularly to a high-strength and aging-resistant EPE material and a preparation method thereof. Background Art

[0002] EPE (Expanded Polyethylene), also known as pearl cotton, is a closed-cell foam plastic formed by physically or chemically foaming polyethylene as a base material. It is mainly made from low-density polyethylene (LDPE) as the raw material and extruded through a physical foaming process to form a lightweight, highly elastic, and superior impact-resistant foam material. The density of EPE is usually low. This material can not only provide solutions for product protection and cushioning performance, but also bring comprehensive benefits of reduced load and transportation costs in logistics transportation, and is particularly suitable for occasions with requirements for light weight, flexibility, and high economic performance.

[0003] With the continuous improvement of the performance requirements of modern industry for packaging, protective materials, and building insulation materials, the research and development of high-performance and environmentally friendly aging-resistant EPE (Expanded Polyethylene) materials have received increasing attention. EPE materials have excellent heat insulation, impact resistance, cushioning, and lightweight properties, and are therefore widely used in fields such as electronic device packaging, precision equipment packaging, and building roof protection.

[0004] Chinese Patent Document CN108264679A discloses a tear-resistant EPE and its preparation method, including 70 - 80 parts of matrix material, 10 - 20 parts of foaming agent, 3 - 7 parts of nucleating agent, 1 - 2 parts of anti-shrinkage agent, 1 - 3 parts of antistatic agent, and 1 - 2 parts of performance improvement additives. The matrix material includes LDPE, LLDPE, and ULDPE, and the performance improvement additives include polypropylene fiber, glass fiber, and silicone flame retardant. The EPE material is obtained through mixing, plasticizing, foaming, cooling and forming, cutting and flattening, and stretching and winding. The EPE of the present invention has excellent tensile strength and tear resistance. Although the mechanical properties of the EPE material prepared by this patent have been improved to a certain extent, the patent does not study the aging resistance performance. Traditional EPE materials are easily affected by ultraviolet rays, oxidation, thermal cycling, etc. during long-term use and are extremely prone to aging and deterioration. Therefore, it is necessary to propose a preparation method for high-strength and aging-resistant EPE materials. Summary of the Invention

[0005] The main object of the present invention is to propose a high-strength and aging-resistant EPE material and a preparation method thereof. By improving the formula of the high-strength and aging-resistant EPE material, the mechanical and aging resistance properties of the material are significantly improved.

[0006] To achieve the above object, the present invention provides a high-strength and aging-resistant EPE material, which comprises the following components in parts by weight: 60-80 parts of low-density polyethylene, 30-40 parts of polyolefin elastomer POE, 2-3 parts of foaming agent, 3-5 parts of composite aging-resistant material, 2-3 parts of compatibilizer, 1-3 parts of lubricant, 1-3 parts of antistatic agent, and 3-5 parts of nucleating agent.

[0007] Preferably, the foaming agent is butane.

[0008] Preferably, the preparation method of the composite aging-resistant material comprises the following steps: (1) Montmorillonite is added to an aqueous solution of sodium dodecylsulfonate, heated for reaction, filtered, and the collected solid is washed with water, dried, ground, and then added to absolute ethanol. An ethanol solution of tetrabutyl titanate is dropped into it; after dropping, the reaction is carried out at room temperature, water is added, stirred and left standing, centrifuged, and the solid is collected. The solid is washed and then placed in a muffle furnace for calcination to obtain a montmorillonite-TiO2 composite; (2) The montmorillonite-TiO2 composite is added to a mixed solution of ethanol and water, and then γ-glycidoxypropyltrimethoxysilane is added, heated for reaction, filtered, and the collected solid is washed and dried to obtain a silane-modified composite; (3) The silane-modified composite is added to N,N-dimethylformamide, 3-isopentenyl-2,4,6-trihydroxybenzophenone and p-toluenesulfonic acid are added, and the reaction is carried out by heating. After the reaction is completed, it is filtered, the collected solid is washed and dried and then added to toluene, benzoin dimethyl ether and 11-mercaptoundecyl phosphoric acid are added, and ultraviolet irradiation reaction is carried out. After the reaction is completed, it is filtered, and the solid product is collected, washed and dried to obtain the composite aging-resistant material.

[0009] Preferably, in step (1), the mass ratio of montmorillonite to the ethanol solution of tetrabutyl titanate is 1-2:4-6; the concentration of the ethanol solution of tetrabutyl titanate is 20-50 wt%.

[0010] Preferably, in step (2), the mass ratio of the montmorillonite-TiO2 composite to γ-glycidoxypropyltrimethoxysilane is 10-20:3.5-5.5; the heating temperature is 40-60 °C, and the heating time is 3-5 h.

[0011] In this step, the montmorillonite-TiO2 composite is reacted with γ-glycidoxypropyltrimethoxysilane to introduce epoxy active groups on titanium dioxide, which is beneficial to subsequent reactions.

[0012] Preferably, in the step (3), the mass ratio of the silane-modified composite, 3-isopentenyl-2,4,6-trihydroxybenzophenone, p-toluenesulfonic acid, benzoin dimethyl ether, and 11-mercaptoundecyl phosphonic acid is 30-50:5-10:1-3:0.3-0.5:7-10; the heating reaction temperature is 60-120 °C.

[0013] In this step, the epoxy group on the silane-modified composite undergoes a ring-opening addition reaction with the hydroxyl group on 3-isopentenyl-2,4,6-trihydroxybenzophenone, and a benzophenone group is introduced onto the titanium dioxide. The benzophenone group can absorb ultraviolet light to inhibit photodegradation and release the energy in the form of heat, effectively preventing the degradation of the EPE material caused by photocatalysis and thermal oxidation, and introducing carbon-carbon double bonds. Finally, a thiol-ene addition reaction occurs with 11-mercaptoundecyl phosphonic acid with a flexible long chain under ultraviolet light irradiation to form the composite anti-aging material; the introduction of 11-mercaptoundecyl phosphonic acid can, on the one hand, entangle the composite anti-aging material with the polymer matrix, restricting the free movement of the polyethylene molecular chain, and at the same time making the molecular chain arrangement of the EPE material more uniform. This molecular entanglement and uniform arrangement effectively improve the mechanical properties of the EPE material. On the other hand, the organic sulfide generated by the reaction of 11-mercaptoundecyl phosphonic acid can capture the free radicals generated during the oxidation process, interrupt the chain reaction, and prevent the free radicals from further attacking the polymer molecular chain, thereby reducing the oxidative degradation of the EPE material, and the introduced phosphate group can improve the heat resistance of the material.

[0014] Preferably, the compatibilizer is PE-g-MAH.

[0015] Preferably, the lubricant is one of zinc stearate and calcium stearate.

[0016] Preferably, the antistatic agent is monoglyceride.

[0017] Preferably, the nucleating agent is at least one of heavy calcium carbonate, talc powder, and silica.

[0018] The present invention also provides a method for preparing the high-strength anti-aging EPE material, comprising the following steps: Add low-density polyethylene, polyolefin elastomer POE, and a nucleating agent into a foaming extruder, melt and blend them to obtain a mixed material, and then add a foaming agent, a composite anti-aging material, a compatibilizer, a lubricant, and an antistatic agent, and foam for 15-20 min under the conditions of a temperature of 180-200 °C and an inlet pressure of 8-12 MPa. After the foaming is completed, cool, extrude, draw, cut, and shape and wind up to obtain the high-strength anti-aging EPE material.

[0019] Compared with the prior art, the beneficial effects of the present invention are: 1) By using low-density polyethylene as the matrix material and supplemented with polyolefin elastomer POE as the reinforcing material, the flexibility and low-temperature impact resistance of the foamed material are improved, enabling the material to have good anti-fracture and anti-deformation properties under high strength. Moreover, a composite anti-aging material is introduced, significantly enhancing the weather resistance, UV resistance, and antioxidant properties of the EPE material, and extending the service life of the material. 2) By adding a composite anti-aging material, the anti-aging and mechanical properties of the EPE material are significantly improved. The preparation of the composite anti-aging material first involves loading titanium dioxide with montmorillonite, which can improve the dispersibility and stability of titanium dioxide, enhance its UV aging resistance, and increase the contact area for reaction with subsequent reactants. Then, titanium dioxide is surface-treated with γ-glycidoxypropyltrimethoxysilane to introduce epoxy active groups. Subsequently, an epoxy ring-opening addition reaction occurs between the epoxy group and the hydroxyl group on 3-isopentenyloxy-2,4,6-trihydroxybenzophenone under acidic conditions, grafting 3-isopentenyloxy-2,4,6-trihydroxybenzophenone onto titanium dioxide and introducing carbon-carbon double bonds. Finally, a thiol-ene addition reaction occurs between the carbon-carbon double bond on the isopentenyl group and 11-mercaptoundecylphosphonic acid under UV irradiation to form the composite anti-aging material. 3-Isopentenyloxy-2,4,6-trihydroxybenzophenone and 11-mercaptoundecylphosphonic acid are grafted onto titanium dioxide, preventing their migration and volatilization during processing, ensuring the durability and stability of the anti-aging effect, and synergistically improving the anti-aging performance of the EPE material with titanium dioxide. Specific Embodiments

[0020] To avoid redundancy, unless otherwise specified, the items used in the following examples are all commercially available products, and the methods used are all conventional methods unless otherwise specified.

[0021] The sources of some raw materials used in the present invention are as follows: Low-density polyethylene, 2426k from Maoming Petrochemical, with a melt flow rate of 4 g / 10 min.

[0022] Polyolefin elastomer POE, 7447 from Dow Chemical, USA, with a melt flow rate (190 °C / 2.16 kg) of 5 g / 10 min.

[0023] Titanium dioxide, rutile type, model HN-T03, purchased from Hangzhou Hengge Nano Technology Co., Ltd. Example 1

[0024] A preparation method of a high-strength and anti-aging EPE material, comprising the following steps: 70 g of low-density polyethylene, 35 g of polyolefin elastomer POE, and 4.3 g of heavy calcium carbonate were added to a foaming extruder for melt blending to obtain a mixed material. Subsequently, 2.5 g of butane, 4 g of a composite anti-aging material, PE-g-MAH, 2.6 g of calcium stearate, and 2.2 g of monoglyceride were added. Foaming was carried out for 18 min at a temperature of 190 °C and an inlet pressure of 10 MPa. After the foaming was completed, it was cooled, extruded, drawn, cut, shaped, and wound to obtain a high-strength anti-aging EPE material.

[0025] The preparation method of the composite anti-aging material includes the following steps: (1) 15 g of montmorillonite was added to 250 mL of a 25 wt% sodium dodecyl sulfonate aqueous solution, stirred at 70 °C for 8 h, cooled to room temperature after stirring, filtered, and the solid collected was washed with water, dried, ground, and then added to 200 mL of absolute ethanol. A 50 g ethanol solution of 43 wt% tetrabutyl titanate was added dropwise thereto. After the dropwise addition, the reaction was carried out at room temperature for 5 h, 100 g of water was added, stirred for 10 min, and then left to stand for 18 h. The solid was collected by centrifugation, washed with absolute ethanol, and then calcined in a muffle furnace at 500 °C for 2 h to obtain a montmorillonite-TiO2 composite; (2) 14.5 g of the montmorillonite-TiO2 composite was added to 200 mL of a mixed solution of ethanol and water with a volume ratio of 1:1, and then 4 g of γ-glycidoxypropyltrimethoxysilane was added. The reaction was carried out by heating at 50 °C for 3 h, filtered, and the solid collected was washed and dried to obtain a silane-modified composite; (3) 12 g of the silane-modified composite was added to 200 mL of N,N-dimethylformamide, 3 g of 3-isopentenyl-2,4,6-trihydroxybenzophenone and 0.8 g of p-toluenesulfonic acid were added, and the reaction was carried out by heating at 100 °C for 3 h. After the reaction was completed, it was filtered, and the solid collected was washed and dried and then added to 200 mL of toluene. 0.36 g of benzoin dimethyl ether and 3.2 g of 11-mercaptoundecyl phosphonic acid were added, and the ultraviolet light irradiation reaction was carried out under an ultraviolet lamp with a power of 200 W for 10 min. After the reaction was completed, it was filtered, and the solid product collected was washed and dried to obtain the composite anti-aging material. Example 2

[0026] A preparation method of a high-strength anti-aging EPE material includes the following steps: 60 g of low-density polyethylene, 30 g of polyolefin elastomer POE, and 3 g of heavy calcium carbonate were added to a foaming extruder, melted and blended to obtain a mixed material. Subsequently, 2 g of butane, 3 g of a composite anti-aging material, PE-g-MAH, 1 g of calcium stearate, and 1 g of monoglyceride were added. Foaming was carried out for 15 - 20 min under the conditions of a temperature of 180 - 200 °C and an inlet pressure of 8 - 12 MPa. After the foaming was completed, it was cooled, extruded, drawn, cut, shaped and wound to obtain a high-strength anti-aging EPE material.

[0027] The preparation method of the composite anti-aging material includes the following steps: (1) 11 g of montmorillonite was added to 250 mL of a 25 wt% sodium dodecyl sulfonate aqueous solution, stirred at 70 °C for 8 h, cooled to room temperature after stirring, filtered, the solid was collected, washed with water, dried, ground, and then added to 200 mL of absolute ethanol. A 40 g ethanol solution of 50 wt% tetrabutyl titanate was added dropwise thereto. After the dropwise addition, the reaction was carried out at room temperature for 5 h, 100 g of water was added, stirred for 10 min and then left standing for 18 h. The solid was collected by centrifugation, washed with absolute ethanol and then calcined in a muffle furnace at 500 °C for 2 h to obtain a montmorillonite-TiO₂ composite; (2) 10 g of the montmorillonite-TiO₂ composite was added to 200 mL of a mixed solution of ethanol and water with a volume ratio of 1:1, and then 3.5 g of γ-glycidoxypropyltrimethoxysilane was added. The reaction was carried out by heating at 40 °C for 5 h, filtered, and the solid was collected, washed and dried to obtain a silane-modified composite; (3) 6 g of the silane-modified composite was added to 200 mL of N,N-dimethylformamide, 1.2 g of 3-isopentenyl-2,4,6-trihydroxybenzophenone and 0.2 g of p-toluenesulfonic acid were added, and the reaction was carried out by heating at 100 °C for 3 h. After the reaction was completed, it was filtered, the solid was collected, washed and dried, then added to 200 mL of toluene, 0.15 g of benzoin dimethyl ether and 1.4 g of 11-mercaptoundecyl phosphonic acid were added, and the ultraviolet light irradiation reaction was carried out under an ultraviolet lamp with a power of 200 W for 10 min. After the reaction was completed, it was filtered, and the solid product was collected, washed and dried to obtain the composite anti-aging material. Example 3

[0028] A preparation method of a high-strength anti-aging EPE material includes the following steps: 80 g of low-density polyethylene, 40 g of polyolefin elastomer POE, and 5 g of heavy calcium carbonate were added to a foaming extruder, melt-blended to obtain a mixed material, and then 3 g of butane, 5 g of a composite anti-aging material, PE-g-MAH, 3 g of calcium stearate, and 3 g of monoglyceride were added. Foaming was carried out for 15 - 20 min under the conditions of a temperature of 180 - 200 °C and an inlet pressure of 8 - 12 MPa. After the foaming was completed, it was cooled, extruded, drawn, cut, shaped, and wound to obtain a high-strength anti-aging EPE material.

[0029] The preparation method of the composite anti-aging material includes the following steps: (1) 20 g of montmorillonite was added to 250 mL of a 25 wt% sodium dodecyl sulfonate aqueous solution, stirred at 70 °C for 8 h, cooled to room temperature after stirring, filtered, and the collected solid was washed with water, dried, ground, and then added to 200 mL of absolute ethanol. 60 g of a 20 wt% ethanol solution of tetrabutyl titanate was added dropwise thereto. After the addition was completed, the reaction was carried out at room temperature for 5 h, 100 g of water was added, stirred for 10 min, and then left standing for 18 h. The solid was collected by centrifugation, and the solid was washed with absolute ethanol and then calcined in a muffle furnace at 500 °C for 2 h to obtain a montmorillonite-TiO2 composite; (2) 18 g of the montmorillonite-TiO2 composite was added to 200 mL of a mixed solution of ethanol and water with a volume ratio of 1:1, and then 5.5 g of γ-glycidoxypropyltrimethoxysilane was added. The reaction was carried out by heating at 50 °C for 3 h, filtered, and the collected solid was washed and dried to obtain a silane-modified composite; (3) 17 g of the silane-modified composite was added to 200 mL of N,N-dimethylformamide, 4 g of 3-isopentenyl-2,4,6-trihydroxybenzophenone and 1.2 g of p-toluenesulfonic acid were added, and the reaction was carried out by heating at 100 °C for 3 h. After the reaction was completed, it was filtered, and the collected solid was washed and dried and then added to 200 mL of toluene. 0.5 g of benzoin dimethyl ether and 4 g of 11-mercaptoundecylphosphonic acid were added, and the ultraviolet light irradiation reaction was carried out under an ultraviolet lamp with a power of 200 W for 10 min. After the reaction was completed, it was filtered, and the solid product was collected, washed, and dried to obtain the composite anti-aging material.

[0030] Comparative Example 1 A preparation method of a high-strength anti-aging EPE material is similar to that of Example 1, except that 11-mercaptoundecylphosphonic acid was not added during the preparation process of the composite anti-aging material. The specific steps are as follows: 70 g of low-density polyethylene, 35 g of polyolefin elastomer POE, and 4.3 g of heavy calcium carbonate were added to a foaming extruder, melt-blended to obtain a mixed material, and then 2.5 g of butane, 4 g of a composite anti-aging material, PE-g-MAH, 2.6 g of calcium stearate, and 2.2 g of monoglyceride were added. Foaming was carried out for 18 min under the conditions of a temperature of 190 °C and an inlet pressure of 10 MPa. After the foaming was completed, it was cooled, extruded, drawn, cut, shaped, and wound to obtain a high-strength anti-aging EPE material.

[0031] The preparation method of the composite anti-aging material includes the following steps: (1) 15 g of montmorillonite was added to 250 mL of a 25 wt% sodium dodecyl sulfonate aqueous solution, stirred at 70 °C for 8 h, cooled to room temperature after stirring, filtered, the solid was collected, washed with water, dried, ground, and then added to 200 mL of absolute ethanol. A 43 wt% ethanol solution of 50 g of tetrabutyl titanate was added dropwise thereto; after the dropwise addition, the reaction was carried out at room temperature for 5 h, 100 g of water was added, stirred for 10 min, and then left standing for 18 h. The solid was collected by centrifugation, washed with absolute ethanol, and then calcined in a muffle furnace at 500 °C for 2 h to obtain a montmorillonite-TiO₂ composite; (2) 14.5 g of the montmorillonite-TiO₂ composite was added to 200 mL of a mixed solution of ethanol and water with a volume ratio of 1:1, and then 4 g of γ-glycidoxypropyltrimethoxysilane was added. The reaction was carried out by heating at 50 °C for 3 h, filtered, and the solid was collected, washed, and dried to obtain a silane-modified composite; (3) 12 g of the silane-modified composite was added to 200 mL of N,N-dimethylformamide, 3 g of 3-isopentenyl-2,4,6-trihydroxybenzophenone and 0.8 g of p-toluenesulfonic acid were added, and the reaction was carried out by heating at 100 °C for 3 h. After the reaction was completed, it was filtered, and the solid was collected, washed, and dried to obtain the composite anti-aging material.

[0032] Comparative Example 2 A preparation method of a high-strength anti-aging EPE material is similar to that of Example 1, except that 3-isopentenyl-2,4,6-trihydroxybenzophenone was not added during the preparation process of the composite anti-aging material. The specific steps are as follows: 70 g of low-density polyethylene, 35 g of polyolefin elastomer POE, and 4.3 g of heavy calcium carbonate were added to a foaming extruder, melt-blended to obtain a mixed material, and then 2.5 g of butane, 4 g of a composite anti-aging material, PE-g-MAH, 2.6 g of calcium stearate, and 2.2 g of monoglyceride were added. Foaming was carried out for 18 min under the conditions of a temperature of 190 °C and an inlet pressure of 10 MPa. After the foaming was completed, it was cooled, extruded, drawn, cut, shaped, and wound to obtain a high-strength anti-aging EPE material.

[0033] The preparation method of the composite anti-aging material comprises the following steps: (1) Add 15 g of montmorillonite to 250 mL of 25 wt% sodium dodecyl sulfonate aqueous solution, stir at 70 °C for 8 h, cool to room temperature after stirring, filter, collect the solid, wash with water, dry, grind, then add it to 200 mL of absolute ethanol, and dropwise add 50 g of an ethanol solution of 43 wt% tetrabutyl titanate; after the dropping is completed, react at room temperature for 5 h, add 100 g of water, stir for 10 min and then stand for 18 h, centrifuge to collect the solid, and calcine the solid in a muffle furnace at 500 °C for 2 h to obtain a montmorillonite-TiO₂ composite; (2) Add 14.5 g of the montmorillonite-TiO₂ composite to 200 mL of a mixed solution of ethanol and water with a volume ratio of 1:1, then add 4 g of γ-glycidoxypropyltrimethoxysilane, heat and react at 50 °C for 3 h, filter, collect the solid, wash and dry to obtain a silane-modified composite; (3) Add 12 g of the silane-modified composite to 200 mL of N,N-dimethylformamide, add 3 g of 11-mercaptoundecylphosphonic acid and 0.8 g of p-toluenesulfonic acid, heat and react at 100 °C for 3 h, filter after the reaction is completed, collect the solid, wash and dry to obtain the composite anti-aging material.

[0034] Performance test After preparing the high-strength anti-aging EPE materials prepared in Examples 1-3 and Comparative Examples 1-2 into standard specimens, perform performance testing, including tensile strength, elongation at break and ultraviolet aging performance testing; the tests of tensile strength and elongation at break are carried out according to "GB / T6344-2008 Flexible Cellular Plastics - Determination of Tensile Strength and Elongation at Break"; Ultraviolet aging test: Place the specimen in a xenon lamp aging chamber, and carry out an aging experiment at 80 °C for 1200 h continuously. The tensile strength change rate = (tensile strength after ultraviolet aging treatment / original tensile strength of the specimen) × 100%. The test results are shown in Table 1; Table 1 Performance test results of high-strength anti-aging EPE materials

[0035] It can be seen from the experimental results in Table 1 that the high-strength anti-aging EPE material prepared in this application has good mechanical properties and ultraviolet aging resistance.

[0036] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the patent protection scope of the present invention.

Claims

1. A high-strength and anti-aging EPE material, characterized in that, It includes the following components in parts by weight: 60 - 80 parts of low - density polyethylene, 30 - 40 parts of polyolefin elastomer POE, 2 - 3 parts of foaming agent, 3 - 5 parts of composite anti - aging material, 2 - 3 parts of compatibilizer, 1 - 3 parts of lubricant, 1 - 3 parts of antistatic agent, and 3 - 5 parts of nucleating agent.

2. The EPE material according to claim 1, wherein: The foaming agent is butane.

3. The EPE material according to claim 1, characterized in that, The preparation method of the composite anti - aging material includes the following steps: (1) Add montmorillonite into the aqueous solution of sodium dodecyl sulfonate, heat and react, filter, collect the solid, wash it with water, dry it, grind it, then add it into anhydrous ethanol, and dropwise add the ethanol solution of tetrabutyl titanate; after dropping, react at room temperature, add water, stir and let it stand, centrifuge, collect the solid, wash the solid and then place it in a muffle furnace for calcination to obtain the montmorillonite - TiO₂ composite; (2) Add the montmorillonite - TiO₂ composite into the mixed solution of ethanol and water, then add γ - glycidoxypropyltrimethoxysilane, heat and react, filter, collect the solid, wash and dry it to obtain the silane - modified composite; (3) Add the silane - modified composite into N,N - dimethylformamide, add 3 - isopentenyl - 2,4,6 - trihydroxybenzophenone and p - toluenesulfonic acid, heat and react, after the reaction is completed, filter, collect the solid, wash and dry it, then add it into toluene, add benzoin dimethyl ether and 11 - mercaptoundecylphosphonic acid, carry out ultraviolet irradiation reaction, after the reaction is completed, filter, collect the solid product, wash and dry it to obtain the composite anti - aging material.

4. The EPE material according to claim 3, characterized in that: In the step (1), the mass ratio of montmorillonite to the ethanol solution of tetrabutyl titanate is 1 - 2:4 - 6; the concentration of the ethanol solution of tetrabutyl titanate is 20 - 50wt%.

5. The EPE material according to claim 3, characterized in that: In the step (2), the mass ratio of the montmorillonite - TiO₂ composite to γ - glycidoxypropyltrimethoxysilane is 10 - 20:3.5 - 5.5; the heating temperature is 40 - 60°C, and the heating time is 3 - 5h.

6. The EPE material according to claim 3, characterized in that: In the step (3), the mass ratio of the silane - modified composite, 3 - isopentenyl - 2,4,6 - trihydroxybenzophenone, p - toluenesulfonic acid, benzoin dimethyl ether, and 11 - mercaptoundecylphosphonic acid is 30 - 50:5 - 10:1 - 3:0.3 - 0.5:7 - 10; the heating reaction temperature is 60 - 120°C.

7. The EPE material according to claim 1, wherein: The compatibilizer is PE - g - MAH.

8. The EPE material according to claim 1, wherein: The lubricant is one of zinc stearate and calcium stearate.

9. The EPE material according to claim 1, characterized in that: The nucleating agent is at least one of heavy calcium carbonate, talc powder, and silica.

10. A method for preparing the EPE material according to any one of claims 1-9, characterized in that, It includes the following steps: Add low - density polyethylene, polyolefin elastomer POE, and nucleating agent into a foaming extruder, melt - blend them to obtain a mixed material, then add the foaming agent, composite anti - aging material, compatibilizer, lubricant, and antistatic agent, and foam for 15 - 20min under the conditions of a temperature of 180 - 200°C and an inlet pressure of 8 - 12MPa. After the foaming is completed, cool it, extrude, draw, cut, and shape and wind it to obtain the high - strength anti - aging EPE material.

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